WO2019150530A1 - Power transmitting device and power receiving device - Google Patents

Abstract

The present invention stably performs wireless power feeding even in a combination of a power transmitting device and a power receiving device which correspond to a plurality of wireless power transmission methods. A power transmitting device 104 performs wireless power transmission to a power receiving device mounted on a power transmission stage 213 and corresponding to a first wireless power transmission method or a second wireless power transmission method. The power transmitting device 104 has a first communication recognition unit and a second communication recognition unit. The first communication recognition unit wirelessly communicates with the power receiving device and performs first processing for recognizing whether the power receiving device corresponds to the first wireless power transmission method or not. The second communication recognition unit wirelessly communicates with the power receiving device and performs second processing for recognizing whether the power receiving device corresponds to the second wireless power transmission method or not.

Description

Power transmission device and power reception device

The present invention relates to a power transmission device and a power reception device, and more particularly, to a technology effective for non-contact power transmission and power reception with respect to an information terminal device such as a portable terminal.

As wireless power supply technologies for portable terminals and the like, electromagnetic induction: MI (Magnetic Induction) method and magnetic field resonance: MR (Magnetic Resonance) method have become mainstream. As the electromagnetic induction method, for example, standards such as Qi (registered trademark) and PMA (registered trademark) are known. As the magnetic field resonance method, for example, a standard such as Resonance (A4WP) (registered trademark) is known.

As a power transmission device using this type of wireless power feeding technology, there is one that supports power transmission by the above-described two wireless power feeding technologies, that is, power transmission by an electromagnetic induction method and power transmission by a magnetic field resonance method (for example, see Patent Document 1).

It is described that the power transmission device of Patent Document 1 has a power transmission coil corresponding to the electromagnetic induction method and a power transmission coil corresponding to the electromagnetic induction method.

US Patent Application Publication No. 2015/0115723

In order to improve the convenience for the user, both the power transmission device and the power reception device need to support the above-described three power supply standards, that is, the electromagnetic induction Qi, PMA, and the magnetic resonance resonance. .

For example, when a plurality of power receiving devices are fed by a power transmitting device corresponding to three power feeding standards, the power transmitting device recognizes which power feeding standard each power receiving device supports, and sets the power feeding standard of the power receiving device. It is necessary to perform corresponding wireless power feeding.

However, none of the above-mentioned power supply standards includes a standard for performing wireless power supply by combining different power supply standards. Therefore, even though the power receiving device is an electromagnetic induction method, malfunction such as starting wireless power feeding by the magnetic resonance method or performing wireless power feeding by the electromagnetic induction method to the magnetic resonance method power receiving device. There is a risk of it occurring.

The same problem may occur when the power transmission side is a power transmission device corresponding to either the electromagnetic induction method or the magnetic resonance method, and the power reception side is a power reception device corresponding to the electromagnetic induction method or the magnetic resonance method.

Moreover, in order to improve the efficiency of power feeding, when the power transmitting device and the power receiving device are both compatible with both the electromagnetic induction method and the magnetic resonance method, the wireless power feeding according to which power feeding standard is used when performing wireless power feeding to a plurality of power receiving devices. It is also necessary to consider whether or not

As described above, when a plurality of power supply standards are supported, various combinations of power supply standards and the like occur, and therefore measures to prevent malfunctions at the time of switching between power supply standards are required for both the power transmission device and the power receiving device.

An object of the present invention is to provide a technology capable of stably performing wireless power feeding even in a combination of a power transmitting device and a power receiving device compatible with a plurality of wireless power transmission methods.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.

That is, a typical power transmission device performs wireless power transmission to a power receiving device corresponding to the first wireless power transmission method or the second wireless power transmission method mounted on the charging stand. The power transmission device includes a first communication recognition unit and a second communication recognition unit.

The first communication recognition unit performs a first process of performing wireless communication with the power receiving apparatus and recognizing whether the power receiving apparatus is compatible with the first wireless power transmission method. The second communication recognition unit wirelessly communicates with the power receiving device, and executes a second process for recognizing whether the power receiving device is compatible with the second wireless power transmission method.

In particular, the first processing executed by the first communication recognition unit is preset with a first detection response signal that responds to a first detection signal indicating that the first wireless power transmission method is supported. If the power receiving device does not reply within the first response time, the power receiving device recognizes that it does not support the first wireless power transmission method.

The second processing executed by the second communication recognition unit is preset with a second detection response signal that responds to the second detection signal indicating that the second wireless power transmission method is supported. If the power receiving device does not reply within the second response time, the power receiving device recognizes that it does not support the second wireless power transmission method.

Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

(1) Malfunctions during wireless power feeding can be reduced.

(2) According to the above (1), a highly reliable power transmission device and power reception device can be provided.

3 is an explanatory diagram illustrating an example of a configuration of a power transmission device and a power reception device according to Embodiment 1. FIG. It is explanatory drawing which shows an example of a structure in the power transmission apparatus of FIG. It is explanatory drawing which showed the other example in the charging stand which the power transmission apparatus of FIG. 2 has. FIG. 2 is a block diagram illustrating an example of a configuration in the power receiving device in FIG. 1. It is explanatory drawing at the time of power transmission of the wireless power by the power receiving apparatus and power transmission apparatus of FIG. It is a flowchart which shows an example of the operation | movement at the time of the power transmission of the wireless power by the power receiving apparatus and power transmission apparatus of FIG. It is explanatory drawing at the time of power transmission of the wireless power by the power receiving apparatus and power transmission apparatus of FIG. It is a flowchart which shows an example of the operation | movement at the time of the power transmission of the wireless power by the power receiving apparatus and power transmission apparatus of FIG. It is explanatory drawing which shows an example of a structure in the power transmission apparatus at the time of using the charging stand of FIG. 10 is a flowchart illustrating an example of an operation when wireless power is transmitted by the power receiving device and the power transmission device of FIG. 9. It is a flowchart which shows an example of the operation | movement at the time of the power transmission of the wireless power by the power receiving apparatus and power transmission apparatus of FIG. It is a flowchart which shows an example of the operation | movement at the time of the power transmission of the wireless power by the power transmission apparatus shown to Fig.2 (a). 6 is a flowchart illustrating an example of wireless power transmission in a power receiving device and a power transmission device according to Embodiment 2. FIG. 10 is an explanatory diagram illustrating an example of a power transmission device and a power reception device according to a fourth embodiment. It is a block diagram which shows an example of a structure in the power transmission apparatus of FIG. It is explanatory drawing which shows the other example in the power transmission apparatus of FIG. It is explanatory drawing which shows the other example in the power transmission apparatus of FIG. It is explanatory drawing which shows the other example in the power transmission apparatus of FIG. It is a flowchart which shows an example of the wireless power transmission by the power transmission apparatus of FIG. 20 is a flowchart illustrating another example of the wireless power transmission of FIG. FIG. 10 is an explanatory diagram illustrating an example of a power transmission device and a power reception device according to a fourth embodiment. It is explanatory drawing which shows an example of a structure in the power transmission apparatus of FIG. FIG. 10 is an explanatory diagram illustrating an example of a configuration in a power receiving device and a power transmission device according to a fifth embodiment. FIG. 10 is an explanatory diagram illustrating an example of a configuration of a power transmission device according to a sixth embodiment. It is explanatory drawing which shows an example of a structure in the power receiving apparatus which receives the electric power transmitted from the power transmission apparatus of FIG. FIG. 26 is a flowchart illustrating an example of an operation of wireless power transmission by the power transmission device of FIG. 24 and the power reception device of FIG. 25. FIG. 10 is an explanatory diagram illustrating an example of a configuration of a power transmission device according to a seventh embodiment. It is explanatory drawing which shows an example of a structure in the power receiving apparatus which receives the power transmitted from the power transmission apparatus of FIG. 29 is a flowchart illustrating an example of wireless power transmission / reception processing by the power transmission device of FIG. 27 and the power reception device of FIG. 28. It is a conceptual diagram which shows an example of the power transmission apparatus and power receiving apparatus by this Embodiment 8. FIG. 31 is an explanatory diagram illustrating an example of a configuration of the power receiving device in FIG. 30. FIG. 31 is a flowchart illustrating an example of wireless power transmission processing by the power transmission device and the power reception device of FIG. 30. FIG. It is explanatory drawing which shows an example of the network connection of the power transmission apparatus of FIG.

In all the drawings for explaining the embodiments, the same members are, in principle, given the same reference numerals, and the repeated explanation thereof is omitted.

(Embodiment 1)
Hereinafter, embodiments will be described in detail.

<Configuration example of power transmission device and power reception device>
FIG. 1 is an explanatory diagram illustrating an example of a configuration in the power transmission device 104 and the power reception devices 101, 102, and 103 according to the first embodiment.

1, the power receiving apparatuses 101, 102, and 103 on the power receiving side are shown on the upper side, and the power transmitting apparatus 104 on the power transmitting side is shown on the lower side. The power transmission device 104 transmits power to the power receiving devices 101, 102, and 103 without contact. The power receiving apparatuses 101, 102, and 103 receive the power transmitted from the power transmitting apparatus 104 in a non-contact manner and supply the power to a battery 405 shown in FIG.

The power transmission device 104 on the non-contact power transmission side is compatible with two types of wireless power transmission of MI method and MR method, and in the example of FIG. 1, wireless power transmission of one system, that is, wireless power transmission to one power receiving device. Is possible. The MR method is a first wireless power transmission method, and the MI method is a second wireless power transmission method.

The power transmission device 104 includes a wireless unit 202, a demodulation unit 212, a control unit 203, a power transmission stand 213, an MR system power transmission coil 207, an MI system power transmission coil 211, and the like. The MR power transmission coil 207 is a first power transmission coil, and the MI power transmission coil 211 is a second power transmission coil.

The wireless unit 202 exchanges information wirelessly with an MR power receiving apparatus. The demodulator 212 demodulates the load modulation information applied to the transmission power of the MI method and outputs the demodulated information to the controller 203. The control unit 203 controls the operation of the power transmission device 104.

The power transmission stand 213 is formed of, for example, a rectangular pad, and charging is performed by mounting the power receiving apparatuses 101, 102, and 103 on the power transmission stand 213. An MR transmission coil 207 is provided near the outer periphery of the power transmission stand 213, and an MI transmission coil 211 is provided inside the MR transmission coil 207.

The power receiving apparatus 101 includes an MR system power receiving coil 401 and receives wireless power by the MR system. The power receiving apparatus 102 includes an MI-system power receiving coil 411 and receives wireless power using the MI system.

The power receiving apparatus 103 includes an MR system power receiving coil 401 and an MI system power receiving coil 411, respectively, and receives wireless power by both the MR system and the MI system. These power receiving apparatuses 101, 102, and 103 can receive wireless power from the power transmitting apparatus 104. A detailed configuration of the power receiving apparatuses 101, 102, and 103 will be described later with reference to FIG.

Any one of the power receiving apparatuses 101, 102, and 103 is provided in an information terminal device (not shown) such as a portable telephone device such as a smartphone, headphones, hearing aids, or smart glasses.

For example, when the information terminal device described above is a portable telephone, the portable telephone is provided with, for example, a communication unit, a voice input unit, a voice output unit, a display unit, an operation input unit, and a camera unit.

In addition, when the information terminal device is a glasses-type information terminal, a communication unit, a voice input unit, a voice output unit, an optical display unit, an operation input unit, a camera unit, and the like are provided. When the information terminal device is a terminal such as a headphone or a hearing aid, it includes a communication unit, a voice input unit, a voice output unit, and the like.

<Configuration example of power transmission device>
Next, the configuration of the power transmission device 104 will be described in detail.

FIG. 2 is an explanatory diagram showing an example of the configuration of the power transmission device 104 of FIG.

2A, the power transmission device 104 includes an antenna 201, a radio unit 202, a control unit 203, an MR power supply unit 204, an MI power supply unit 208, matching units 205 and 209, capacitors 206 and 210, and an MR system. Power transmission coil 207, MI power transmission coil 211, demodulation unit 212, object detection unit 214, and memory 217.

The antenna 201, the radio unit 202, and the control unit 203 constitute a first communication recognition unit, and the MI system power transmission coil 211, the demodulation unit 212, and the control unit 203 constitute a second communication recognition unit. Is done.

2A has a configuration in which an MR power supply unit 204 and an MI power supply unit 208 are provided. When wireless power is supplied by the MR method, the MR power supply unit 204 is set by the control unit 203 at the frequency fr used for the MR method via the matching unit 205 and the capacitor 206 to the MR power transmission coil 207. And output wireless power from the MR system power transmission coil 207.

The matching unit 205 matches the impedance between the preceding stage and the subsequent stage of the matching unit 205 while the power transmission device 104 is transmitting wireless power. The capacitance value of the capacitor 206 is a value that causes series resonance with the inductance value of the MR transmission coil 207 and the frequency fr of the MR transmission power.

The wireless unit 202 exchanges information with the MR power receiving apparatus via the antenna 201 and inputs / outputs information to / from the control unit 203. On the other hand, when wireless power is supplied by the MI method, the MI power supply unit 208 causes the control unit 203 to use the MI method power transmission coil 211 via the matching unit 209 and the capacitor 210 according to the frequency fi used for the MI method. The set electric energy is output and the wireless power is output from the MI system power transmission coil 211.

The matching unit 209 matches the impedance between the preceding stage and the subsequent stage of the matching unit 209 while the power transmission device 104 is transmitting wireless power. The capacitance value of the capacitor 210 is such a value that series resonance is caused by the inductor value of the MI transmission coil 211 and the frequency fi of the MI transmission power.

The demodulator 212 demodulates the load modulation information applied to the transmission power of the MI system and outputs the demodulated information to the controller 203. As shown in FIG. 1, the MR system power transmission coil 207 and the MI system power transmission coil 211 are respectively provided on the power transmission table 213 on which the power receiving device is placed.

The object detection unit 214 detects that an object is placed on the power transmission stand 213, and outputs the detection result to the control unit 203. As a detection technique, for example, detection by a switch that reacts to the weight of a mounted object, detection by a switch that reacts to the contact of an object, detection by an optical sensor or a camera, or reaction from a power receiving device by a beacon described later, It may be anything such as detection of the presence or absence of wireless power consumption.

The memory 217 includes a non-volatile semiconductor memory exemplified as a flash memory, ID information for identifying a power receiving device that transmits power, ID information, and position information of a power receiving device placed on a power transmission stand 213 described later. Stores information associated with. Such information is read from and written to the memory 217 by the control unit 203.

FIG. 2B shows another configuration example of the power transmission device 104 shown in FIG.

In the power transmission device 104 shown in FIG. 2A, the MR power supply unit 204 and the MI power supply unit 208 are provided, but in the case of the power transmission device 104 in FIG. An MR / MI power supply unit 215 for supplying power for the MR system and the MI system is provided.

When supplying wireless power by the MR method, the MR / MI power supply unit 215 outputs the amount of power set by the control unit 203 to the matching unit 216 using the MR method frequency fr. When wireless power is supplied by the MI method, the power amount set by the control unit 203 is output to the matching unit 216 using the MI method frequency fi.

In the MR system, the matching unit 216 feeds power to the MR power transmission coil 207 via the capacitor 206 under the control of the control unit 203 and matches the impedance between the preceding stage and the subsequent stage of the matching unit 216.

In the case of the MI system, power is supplied to the MI system power transmission coil 211 through the capacitor 210 under the control of the control unit 203, and impedances of the preceding stage and the subsequent stage of the matching unit 216 are matched. Therefore, the control unit 203 is also shared.

In addition, since it is the same as that of the power transmission apparatus 104 of Fig.2 (a) about other connection structure, description is abbreviate | omitted.

2A, the MR power supply unit 204 corresponding to the frequency fr of MR transmission power and the MI power supply unit corresponding to the transmission power frequency fi in the case of the MI method. Since 208 is provided, it is possible to provide a power supply unit having an optimum design specialized for a narrow band of each frequency.

Further, according to the power transmission device 104 of FIG. 2B, since it is configured by one MR / MI power supply unit 215, the number of output amplifiers can be smaller than that of FIG. Thus, cost reduction of the power transmission device 104 can be realized.

<Example of charging stand>
FIG. 3 is an explanatory diagram showing another example of the power transmission stand 213 included in the power transmission device 104 of FIG. FIG. 3 shows another arrangement example of the MR system power transmission coil and the MI system power transmission coil provided on the power transmission stand 213.

3 is provided with an MR transmission coil 207 in the vicinity of the outer peripheral portion of the power transmission table 213 in the same manner as the power transmission table 213 in FIG. Inside the MR power transmission coil 207, a plurality of MI power transmission coils 211 are provided in an array.

In the example of FIG. 3, for example, a total of 25 MI-system power transmission coils 211 of 5 rows × 5 columns are arranged, and a total of 25 MI-system power transmission coils 211 are arranged to form a composite coil 301. .

In the power transmission stand 213 in FIG. 1, one MI power transmission coil 211 is arranged inside the MR power transmission coil 207, and the information terminal device placed on the power transmission stand 213 is almost the same size as the power transmission stand 213. I assumed an object.

On the other hand, in FIG. 3, an information terminal device smaller than the power transmission stand 213 is assumed. In the power transmission stand 213 in FIG. 3, beacons described later are sequentially fired to the 25 MI power transmission coils 211, and one coil that responds to the beacons is selected.

According to the configuration of the power transmission stand 213 in FIG. 3, it is possible to charge an information terminal device smaller than the power transmission stand 213 by the MI method. At this time, even if the foreign object is placed on the power transmission stand 213, there is an effect that the foreign object does not generate heat because wireless power is not transmitted from the power transmission coil in the portion where the foreign object is placed.

In addition, when a power receiving apparatus and a foreign object that are compatible with both the MR method and the MI method are placed on the power transmission stand 213, the MR method wirelessly uses the MI method even when the foreign object is detected and wireless transmission is not performed. Electric power can be transmitted.

<Example configuration of power receiving device>
FIG. 4 is a block diagram illustrating an example of the configuration of the power receiving apparatuses 101 to 103 in FIG.

FIG. 4A is a block diagram showing a configuration of the MR power receiving apparatus 101. FIG. 4B is a block diagram illustrating a configuration of the MI-type power receiving apparatus 102. FIG. 4C is a block diagram illustrating a configuration of the power receiving apparatus 103 that supports both the MR method and the MI method.

As shown in FIG. 4A, the power receiving apparatus 101 includes an MR system power receiving coil 401, a capacitor 402, a rectifying unit 403, a DC-DC converting unit 404, a battery 405, a control unit 406, a radio unit 407, an antenna 408, It has a recognition unit 409 and a memory 410.

In the power receiving apparatus 101, the MR system power receiving coil 401 receives MR wireless power. The wireless power received by the MR system power receiving coil 401 is output to the rectifying unit 403 via the capacitor 402.

The capacitance value of the capacitor 402 is a value that causes series resonance with the inductance value of the MR system receiving coil 401 and the frequency fr of the MR system transmission power. The rectification unit 403 rectifies the received power and charges the battery 405 via the DC-DC conversion unit 404. The charge amount of the battery 405 is monitored by a control unit 406 that is a power reception control unit.

The DC-DC converter 404 converts the power rectified by the rectifier 403 into a voltage or a current according to the amount of charge under the control of the controller 406, and outputs the charging power to the battery 405. The battery 405 supplies power to each functional block included in the information terminal device. Here, the power receiving apparatus 101 includes the battery 405. However, the battery 405 may be configured to be included in a portable terminal device or the like in which the power receiving apparatus 101 is provided.

The wireless unit 407 exchanges information such as the charge amount with the power transmission device 104 via the antenna 408 based on the control of the control unit 406. The recognition unit 409 monitors the input power or output power of the rectification unit 403, recognizes the presence or absence of a beacon described later, and outputs it to the control unit 406.

The memory 410 is composed of a nonvolatile memory such as a flash memory, for example, and stores ID information indicating its own power receiving apparatus. The control unit 406 reads and writes information such as the amount of charge of the battery 405 and information on the power transmission device from the wireless unit 407 in the memory 410. Further, the information is displayed on a display unit (not shown).

As shown in FIG. 4B, the power receiving apparatus 102 includes an MI system power receiving coil 411, a capacitor 412, a rectifying unit 403, a DC-DC converting unit 404, a battery 405, a control unit 406, a recognition unit 409, and load modulation. Part 413. In the power receiving apparatus 102, the rectification unit 403, the DC-DC conversion unit 404, the battery 405, the control unit 406, and the recognition unit 409 are the same as those in FIG.

The MI system power receiving coil 411 receives MI system wireless power. The power received by the MI system receiving coil 411 is output to the rectifying unit 403 via the capacitor 412.

The capacitance value of the capacitor 412 is a value that causes series resonance with the inductance value of the MI system receiving coil 411 and the frequency fi of the MI system transmission power. The rectification unit 403 rectifies the received power and charges the battery 405 via the DC-DC conversion unit 404. The charge amount of the battery 405 is monitored by the control unit 406.

The DC-DC converter 404 converts the power rectified by the rectifier 403 into a voltage or a current according to the amount of charge based on the control of the controller 406, and outputs the charging power to the battery 405. The battery 405 supplies power to each functional block included in the mobile terminal device.

The load modulation unit 413 changes the load according to information such as the amount of charge from the control unit 406, changes the wireless power input to the MI system power receiving coil 411, and transmits the information to the power transmission device 104.

The recognition unit 409 monitors the input power or the output power of the rectification unit 403, recognizes the presence or absence of a beacon described later, and outputs it to the control unit 406. The memory 410 is composed of, for example, a nonvolatile memory such as a flash memory, and stores ID information indicating its own power receiving device. The control unit 406 reads and writes information such as the charge amount in the memory 410. Such information may be displayed on a display unit (not shown).

As shown in FIG. 4C, the power receiving apparatus 103 includes an MR system power receiving coil 401, capacitors 402 and 412, a DC-DC converter 404, a battery 405, a controller 406, a radio unit 407, an antenna 408, and a recognition unit. 409, a memory 410, a load modulation unit 413, and a rectification unit 414.

The power receiving device 103 in FIG. 4C corresponds to both the MR method and the MI method, and is a combination of the power receiving device 101 in FIG. 4A and the power receiving device 102 in FIG. 4B. .

The rectifying unit 414 rectifies the received power from the MR system power receiving coil 401 and the MI system power receiving coil 411 and outputs the rectified power to the DC-DC converter 404. The recognizing unit 409 monitors the input power or output power of the rectifying unit 414, recognizes the presence / absence and information of a beacon, which will be described later, and controls system information indicating whether the power is received by the MR system or the MI system The data is output to the unit 406. Further, the information may be displayed on a display unit (not shown).

The frequency fr of the MR transmission power and the frequency fi of the MI transmission power are different. Therefore, in the MR system, the MR system power receiving coil 401 receives power, and in the MI system, the MI system power receiving coil 411 receives power.

The recognizing unit 409 recognizes whether the received power input to the rectifying unit 414 is input from the MR system power receiving coil 401 or the MI system power receiving coil 411, so that the received system is the MR system or the MI system. It may be used as a judgment material.

The control unit 406 recognizes a method in which wireless power is transmitted from the method information output from the recognition unit 409, and exchanges or transmits information with the power transmission device 104 to charge the battery 405. The battery 405 supplies power to each functional block included in the mobile terminal device.

Subsequently, operations of the power receiving apparatuses 101 to 103 and the power transmitting apparatus 104 will be described.

<Operation example of power receiving device and power transmitting device>
FIG. 5 is an explanatory diagram when wireless power is transmitted by the power receiving device 103 and the power transmitting device 104 of FIG. 1. FIG. 6 is a flowchart illustrating an example of an operation when wireless power is transmitted by the power receiving device 103 and the power transmitting device 104 in FIG. 5.

Here, it is assumed that the power transmission device 104 is a power transmission device that transmits wireless power by the MI method, and the power reception device of FIG. 1 that supports the wireless power transmitted from the power transmission device 104 in both the MR method and the MI method. A case of receiving power at 103 will be described.

Therefore, the power transmission device 104 shown in FIG. 5 has a configuration in which the MR power supply unit 204, the matching unit 205, the capacitor 206, and the MR power transmission coil 207 are removed from the configuration of the power transmission device 104 in FIG. It has become. In the example of FIG. 5, the power transmission device 104 can charge one system of MI systems, that is, one power receiving device.

6, first, when the power transmission process of the power transmission device 104 is started (step S601), the object detection unit 214 detects that an object is placed on the power transmission stand 213 (step S602).

The control unit 203 receives the detection signal from the object detection unit 214, controls the MI power supply unit 208, and responds to the second response request from the MI transmission coil 211 via the matching unit 209 and the capacitor 210. A certain MI-type beacon is fired (step S603). Here, the MI system beacon indicates a unique wireless power pattern indicating the MI system while supplying wireless power to the MI power receiving apparatus.

When the power receiving process by the power receiving apparatus 103 compatible with the multiple systems starts (step S621), the power receiving apparatus 103 receives the wireless power from the power transmitting apparatus 104 by the MI system power receiving coil 411, and the rectifying unit 414 via the capacitor 412. To enter.

Then, the battery 405 is charged via the DC-DC converter 404 and power is supplied to each functional block of the mobile terminal device having the power receiving device 103 (step S622). At this time, priority is given to power supply to the control unit 406 and the recognition unit 409 in particular.

Upon receiving the power supply, the recognizing unit 409 recognizes the MI system beacon, which is a unique wireless power pattern indicating the wireless power MI system input to the rectifying unit 414, and recognizes the MI system in the control unit 406. Is notified (step S623).

At this time, if the recognition unit 409 cannot recognize the MI-type beacon or the MR-type beacon, there is a possibility that the power receiving apparatus 103 is placed in another power transmission apparatus that does not support the wireless power transmission system. Therefore, the power receiving apparatus 103 displays an abnormality on a display unit (not shown) (step S630).

Upon receiving the MI method recognition notification from the recognition unit 409, the control unit 406 recognizes that the power transmission device 104 is an MI wireless power transmission method, and determines the power receiving device 103 as an operation for the MI method (Step S406). S624). That is, only the blocks shown in FIG. 4B are used.

The control unit 406 controls the load modulation unit 413 to change the load based on information indicating that the power receiving apparatus 103 has recognized the MI beacon (step S625).

The power transmission device 104 continues to wait for the determined response time Ti for the MI beacon response from the object placed on the power transmission stand 213. The response time Ti is a second response time. As for the MI beacon response, the control unit 203 confirms the output from the load modulation demodulation unit 212 (step S604).

If there is no MI beacon response even after waiting for the response time Ti, it is determined that the object placed on the power transmission stand 213 is not a MI-system power receiving device and is recognized as a foreign object (step S610).

The power transmission device 104 performs an abnormal display on a display unit (not shown) or the like (step S611). The control unit 406 controls the load modulation unit 413 to change the load based on information corresponding to the ID information assigned to the power receiving device stored in the memory 410 of the power receiving device 103 (step S626).

When the control unit 203 confirms the MI beacon response within the response time Ti, the control unit 203 recognizes that the object placed on the power transmission stand 213 is a power receiving device compatible with the MI method, and confirms ID information from the power receiving device. (Step S605).

The ID information includes identification information for identifying the power transmission device 104, charging information indicating the capacity to be charged, and the like. The ID information is stored in the memory 217 after the control unit 203 confirms the output from the demodulation unit 212 for load modulation.

The control unit 203 identifies and recognizes the charging capacity of each power transmission device or battery from the ID information, and controls the MI power supply unit 208 to control the MI power supply unit 208 via the matching unit 209 and the capacitor 210. The MI system power transmission coil 211 starts MI system power transmission (step S606).

The power receiving apparatus 103 receives the wireless power from the power transmitting apparatus 104 by the MI system power receiving coil 411 and rectifies it by the rectifying unit 414 via the capacitor 412. Then, charging of the battery 405 is started via the DC-DC converter 404 (step S627).

The control unit 406 monitors the amount of charge of the battery 405 and the state of charge of the battery 405, and controls the load modulation unit 413 based on information corresponding to the state of charge to change the load (step S628).

Check the charging status from the power receiving device 103. For the information corresponding to the charging status, the control unit 203 confirms the output from the demodulation unit 212 for load modulation (step S607). Based on the information corresponding to the charging status, the control unit 203 determines whether charging is in progress or charging is complete (step S608). In addition, the control unit 203 determines an abnormal state based on information indicating that the information corresponding to the charging state is not received or information indicating an abnormality from the power receiving apparatus 103.

When charging, the control unit 203 checks the amount of charge of the power receiving device 103 or the amount of charge required by the power receiving device 103, and controls the MI power supply unit 208 to adjust the amount of power to be wirelessly transmitted ( Step S609). Thereafter, the process returns to step S607.

When it is determined that the control unit 203 is in an abnormal state and no information corresponding to the charging state arrives, it is determined that the power receiving device 103 has been removed from the power transmission stand 213 during charging. In the case of information indicating an abnormality from the power receiving apparatus 103, the abnormality of the power receiving apparatus 103 is recognized (step S612). Information from the object detection unit 214 can also be used for recognition when the power receiving apparatus 103 is removed from the power transmission stand 213 during charging.

The control unit 203 controls the MI power supply unit 208 to stop wireless power transmission (step S613). When the power receiving apparatus 103 recognizes an abnormality, the abnormality is displayed on a display unit (not shown). When the charging state is the charging completion, the load modulation unit 413 is controlled with information corresponding to the charging completion to change the load (step S629).

When information corresponding to the end of charging arrives from the power receiving apparatus 103, the control unit 203 controls the MI power supply unit 208 to stop wireless power transmission and display power transmission completion on a display unit (not shown) or the like (step S614). . The control unit 406 controls the DC-DC conversion unit 404 to stop charging the battery 405, and the charging operation of the power receiving apparatus 103 ends (step S631).

Subsequently, a case will be described in which wireless power is transmitted from the MR power transmission apparatus 104 and received by the power reception apparatus 103 that supports a plurality of systems. Here, the power transmission device 104 is capable of one-system MR charging.

FIG. 7 is an explanatory diagram when wireless power is transmitted by the power receiving apparatus 103 and the power transmitting apparatus 104 of FIG. FIG. 8 is a flowchart illustrating an example of an operation when wireless power is transmitted by the power receiving device 103 and the power transmitting device 104 in FIG. 7.

When the power transmission process of the power transmission device 104 is started (step S641), the object detection unit 214 detects that an object is placed on the power transmission table 213 (step S642). The control unit 203 receives the detection signal from the object detection unit 214, controls the MR power supply unit 204, and makes a first response request from the MR power transmission coil 207 via the matching unit 205 and the capacitor 206. An MR beacon is fired (step S643). Here, the MR system beacon indicates a unique wireless power pattern indicating the MR system while supplying wireless power to the MR power receiving apparatus.

The power reception processing start of the power receiving apparatus 103 starts (step S661). The power receiving device 103 receives the wireless power from the power transmitting device 104 by the MR power receiving coil 401, inputs the wireless power to the rectifying unit 414 via the capacitor 402, and charges the battery 405 via the DC-DC converting unit 404. Electric power is supplied to each functional block (step S662). At this time, priority is given to power supply to the control unit 406 and the recognition unit 409 in particular.

The recognizing unit 409 receives the power supply, recognizes the MR beacon that is a unique wireless power pattern indicating the MR method of the wireless power input to the rectifying unit 414, and recognizes the MR method in the control unit 406. Notification is made (step S663).

At this time, if the recognition unit 409 cannot recognize the MI-type beacon or the MR-type beacon, there is a possibility that the power receiving apparatus 103 is mounted on another power transmission apparatus that does not support the wireless power transmission system. Therefore, the power receiving apparatus 103 corresponding to the plurality of methods displays an abnormality on a display unit (not shown) or the like (step S670).

Upon receiving the MR method recognition notification from the recognition unit 409, the control unit 406 recognizes that the power receiving apparatus 103 is an MR wireless power transmission system, and determines the power receiving apparatus 103 as an MR system operation (step) S664). That is, only the functional blocks shown in FIG.

The control unit 406 controls the wireless unit 407 to transmit information indicating that the power receiving apparatus 103 has recognized the MR beacon from the antenna 408 (step S665). The power transmission device 104 continues to wait for the determined response time Tr for the MR beacon response from the object placed on the power transmission stand 213 (step S644). The response time Tr is a first response time. The control unit 203 confirms the output of the MR beacon response received by the antenna 201 and demodulated by the radio unit 202.

If there is no MR beacon response even after waiting for the response time Tr, it is determined that the object placed on the power transmission stand 213 is not an MR-type power receiving device and is recognized as a foreign object (step S650). The power transmission device 104 performs an abnormal display on a display unit (not shown) or the like (step S651).

The control unit 406 controls the wireless unit 407 to transmit information corresponding to the ID information assigned to the power receiving device stored in the memory 410 of the power receiving device 103 from the antenna 408 (step S666).

When the control unit 203 confirms the MR beacon response that is the first detection response signal within the time of the response time Tr, the control unit 203 recognizes that the object placed on the power transmission stand 213 is an MR-system power receiving device. Then, ID information from the power receiving apparatus 103 is confirmed (step S645).

The ID information includes identification information for identifying the power transmission device 104, charging information indicating the capacity to be charged, and the like. The ID information is received by the antenna 201 and the output demodulated by the wireless unit 202 is confirmed by the control unit 203 and stored in the memory 217.

The control unit 203 identifies and recognizes the individual power transmission devices and charging capacities with the ID information of the power receiving device 103, controls the MR power supply unit 204, and uses the matching unit 205 and the capacitor 206 for the MR system. MR power transmission is started from the power transmission coil 207 (step S646).

The power receiving device 103 receives the wireless power from the power transmitting device 104 by the MR system power receiving coil 401, rectifies it by the rectifying unit 414 through the capacitor 402, and charges the battery 405 through the DC-DC converting unit 404. Start (step S667).

The control unit 406 monitors the amount of charge to the battery 405 and the state of charge of the battery of the DC-DC conversion unit 404, controls the wireless unit 407 with information corresponding to the state of charge, and communicates from the antenna 408 (step). S668).

Check the charging status from the power receiving device 103. The information corresponding to the charging state is received by the antenna 201 and the control unit 203 confirms the output demodulated by the wireless unit 202 (step S647).

The control unit 203 determines whether charging is in progress or charging is complete based on information corresponding to the charging status (step S648). Further, the abnormal state is determined based on information indicating that the information corresponding to the charging status is not received or information indicating abnormality from the power receiving apparatus.

If charging is in progress, the charging amount of the power receiving device 103 or the charging amount required by the power receiving device 103 is confirmed, and the control unit 203 controls the MR power supply unit 204 to adjust the amount of power to be wirelessly transmitted ( Step S649). Thereafter, the process returns to step S647.

When it is determined that the control unit 203 is in an abnormal state and no information corresponding to the charging state arrives, it is determined that the power receiving apparatus 103 has been removed from the power transmission stand 213 during charging (step S652). In the case of information indicating an abnormality from the power receiving apparatus 103, the abnormality of the power receiving apparatus 103 is recognized. Note that information from the object detection unit 214 can also be used for recognition when the power receiving apparatus 103 is removed from the power transmission stand 213 during charging.

The control unit 203 controls the MR power supply unit 204 to stop wireless power transmission, and when the power receiving apparatus 103 recognizes an abnormality, displays the abnormality on a display unit (not shown) or the like (step S653). When the charging state is the charging completion, the wireless unit 403 is controlled with information corresponding to the charging completion and transmitted from the antenna 408 (step S669).

When information corresponding to the end of charging arrives from the power receiving apparatus 103, the control unit 203 controls the MR power supply unit 204 to stop wireless power transmission, and displays power transmission completion on a display unit (not shown) (step). S654).

The control unit 406 controls the DC-DC conversion unit 404 to stop the charging of the battery 405, and the charging operation of the power receiving apparatus 103 ends (step S671).

In addition, when the power transmission from the power transmission device 104 stops before the charging is completed, the power receiving device 103 determines that it has been removed from the power transmission stand 213, and returns to the process of step S621 or the process of step S661.

As described above, in the case of charging by the MI method, the power receiving apparatus 103 can be charged by the operation flow shown in FIG. 6, and in the case of charging by the MR method, the power receiving apparatus 103 by the operation flow shown in FIG. Can be charged.

Therefore, even the power receiving apparatus 103 compatible with a plurality of systems that supports both the MR system and the MI system can be easily charged.

FIG. 9 is an explanatory diagram showing an example of the configuration of the power transmission device 104 when the power transmission stand 213 of FIG. 3 is used.

In the example of FIG. 9, the power transmission device 104 uses the power transmission stand 213 shown in FIG.

In this case, the power transmission device 104 has the power transmission stand 213 in FIG. 3 as shown in FIG. Also, two systems of MI power supply unit 208, matching unit 209, capacitor 210, and demodulation unit 212 are prepared. These systems are identified by subscripts a and b.

FIG. 10 is a flowchart illustrating an example of an operation in wireless power transmission by the power receiving device 103 and the power transmission device 104 in FIG. 9.

Basically, it is the same processing as FIG. 6 described above, except that the number and positions of the power receiving apparatuses 103 are confirmed by repeating the processing in step S801, the processing in step S603, and the processing in step S604. In addition, the processes of step S603 to step S613 are performed between the process of step S801 and the process of step S802 by the number of confirmed times. Hereinafter, in the flowcharts, the process steps having the same numbers as the other figures are the same as the process steps in the corresponding figure.

For confirmation of the number and position of the power receiving apparatuses 103, for example, the number of MI beacons is confirmed by the number of MI system power transmission coils 211 constituting the combined coil 301 by using the a system on the power transmission side. Then, the number of power receiving devices responding to the MI beacons placed on the power transmission stand 213 and the position of the MI system coil 211 corresponding to the number are investigated. In the example of FIG. 7, MI beacons are confirmed for 25 coils.

Thereafter, the position of the power receiving apparatus 103 and the ID information are associated with each other, and each power receiving apparatus 103 is charged. Information indicating the position of the coil to be charged is displayed on a display unit (not shown).

If the number of power receiving apparatuses 103 is equal to or less than the number of power transmission systems included in the power transmission apparatus 104, charging is performed in parallel. When the object detection unit 214 detects that the number of power receiving devices has increased from the middle, the process returns to step S801. As described above, according to the example of FIGS. The number of power receiving devices corresponding to the maximum number of coils can be charged. Therefore, convenience for the user can be improved.

FIG. 11 is a flowchart illustrating an example of an operation when wireless power is transmitted by the power receiving apparatus 103 and the power transmitting apparatus 104 of FIG.

FIG. 11 shows an example in which MR transmission is applied to a plurality of systems. In this case, the output of the MR power supply unit 204 is increased so as to correspond to a plurality of power receiving devices.

The basic operation is the same as the processing in FIG. When there are a plurality of power receiving devices, ID information and charging information of each power receiving device are associated, and wireless power transmission and charging control of the power receiving device are performed from the power transmitting device 104 for each power receiving device.

Information exchange is performed via the wireless units 202 and 407, respectively. In addition, the charge status confirmation that is the process of step S648 is a constant in which the total charge status is greater than the amount of power being transmitted in consideration of both the individual charge status and the total charge status of all power receiving devices. If it is less than the amount, it is considered that there is a foreign object and power transmission is stopped.

According to the example of FIG. 11, charging can be performed corresponding to a plurality of power receiving devices with the same configuration as that of one power receiving device. Also in this case, convenience can be improved.

FIG. 12 is a flowchart illustrating an example of an operation at the time of wireless power transmission by the power transmission device 104 illustrated in FIG.

FIG. 12 shows an operation flow when wireless power is transmitted by a combination of the multi-system power receiving apparatus 103 and the multi-system power transmission apparatus 104 of FIG.

First, when the power transmission process of the power transmission device 104 is started (step S1001), the object detection unit 214 detects that an object is placed on the power transmission table 213 (step S1002).

It is confirmed whether or not the object placed on the power transmission stand 213 is an MI-type power receiving device (step S603). Upon receiving the detection signal from the object detection unit 214, the control unit 203 controls the MI power supply unit 208 to emit an MI system beacon from the MI system power transmission coil 211 via the matching unit 209 and the capacitor 210. Here, the MI system beacon indicates a unique wireless power pattern indicating the MI system while supplying wireless power to the MI power receiving apparatus.

The power transmission device 104 confirms the MI beacon response emitted from the object placed on the power transmission stand 213 (step S604). For the MI beacon response, the control unit 203 confirms the output from the load modulation demodulation unit 212. If there is no MI beacon response, the process proceeds to step S1003. If there is an MI beacon response, the process proceeds to step S605.

If there is an MI beacon response, it recognizes that the object placed on the power transmission stand 213 is a power receiving apparatus compatible with the MI method, and confirms ID information from the power receiving apparatus (step S605). The ID information includes identification information for identifying the power transmission device, charging information indicating the capacity to be charged, and the like. Thereafter, the process proceeds to step S1004.

If there is no MI beacon response in the process of step S604, it is confirmed whether or not the determined response time Ti has been reached (step S1003). If it is not time, the process returns to step S603, and if the time has passed, the process proceeds to step S643.

When the MI-type power transmission process starts (step S1004), the same processes as in steps S606 to S614 in FIG. 6 are performed. Note that the processing in steps S610 to S614 in FIG. 6 excludes the processing in steps S610 and S611.

If there is no MI beacon response during the response time Ti, it is determined that the object placed on the power transmission stand 213 is not an MI-type power receiving device (step S643). Then, it is confirmed whether or not the object placed on the power transmission stand 213 is an MR power receiving device.

The control unit 203 controls the MR power supply unit 204 to emit an MR system beacon from the MR system power transmission coil 207 via the matching unit 205 and the capacitor 206. The MR beacon indicates a unique wireless power pattern indicating the MR method while supplying wireless power to the MR power receiving apparatus.

The power transmission device 104 confirms the MR beacon response emitted from the object placed on the power transmission stand 213 (step S644). The control unit 203 confirms the output received by the antenna 201 and demodulated by the radio unit 202 from the MR beacon response. If there is no MR beacon response, the process proceeds to step S1005. If there is an MR beacon response, the process proceeds to step S645.

If there is an MR beacon response, it recognizes that the object placed on the power transmission stand 213 is a power receiving apparatus compatible with the MR system, and confirms ID information from the power receiving apparatus (step S645). The ID information includes identification information for identifying the power transmission device 104, charging information indicating the capacity to be charged, and the like. Thereafter, the process proceeds to step S1006.

If there is no MR beacon response in the process of step S644, it is confirmed whether or not the determined response time Tr has been reached (step S1006). If the predetermined response time has not been reached, the process returns to step S643, and if the time has passed, the process proceeds to step S1007.

If there is an MR beacon response, MR type power transmission processing is started (step S1006). This is the same processing as the processing of steps S646 to S654 except for the processing of steps S650 and S651 in FIG.

If there is no MR beacon response during the response time Tr, it is determined that the object placed on the power transmission stand 213 is not an MR power receiving device (step S1007). Further, when the process proceeds to step S643, it is determined that the power receiving apparatus is not an MI type power receiving apparatus. That is, the object placed on the power transmission stand 213 is an object that does not support either the MI method or the MR method, and the control unit 203 determines that a foreign object has been placed.

As described above, according to the processing flow shown in FIG. 10, power can be transmitted to both the MR power receiving apparatus 101 in FIG. 1 and the MI power receiving apparatus 102 in FIG. In the case of the power receiving apparatus 103 in FIG.

Note that if the order of the MI method confirmation processing, which is the processing of steps S603, S604, and S1003 in FIG. 12, and the MR method confirmation processing that is the processing of steps S643, S644, and S1005 in FIG. It is obvious that the power receiving apparatus 103 corresponding to the system can be made to determine the power transmission system in the MR system.

Whether the MI method confirmation processing or the MR method confirmation processing is performed first may be performed from the confirmation processing of the shorter response time Ti and response time Tr, for example. Further, in the case where the MI-type power transmission coil has the configuration of the composite coil 301 shown in FIG. 3, in order to determine the power transmission coil to be used, a maximum time of Ti × 25 (the number of power transmission coils constituting the composite coil) is required. For this reason, it is conceivable that the time is compared with the time of Tr and the confirmation process is performed for the shorter time.

As described above, the power transmission apparatus 104 that can perform power feeding satisfactorily even when various methods such as non-contact power feeding by the MR method, non-contact power feeding by the MI method, and non-contact power feeding corresponding to both the MR method and the MI method are mixed. In addition, power receiving apparatuses 101 to 103 can be provided.

(Embodiment 2)
<Operation example of power receiving device and power transmitting device>
In the second embodiment, an operation in wireless power transmission by a combination of a power receiving apparatus 103 compatible with a plurality of systems and a power transmission apparatus 104 compatible with a plurality of systems will be described.

FIG. 13 is a flowchart illustrating an example of wireless power transmission in the power receiving device 103 and the power transmitting device 104 according to the second embodiment.

Here, the power transmission apparatus 104 corresponding to a plurality of systems is configured as shown in FIG. 2A of the first embodiment.

First, when the power transmission process of the power transmission device 104 starts (step S1101), the object detection unit 214 detects that an object is placed on the power transmission table 213 (step S1002).

Subsequently, the MI method confirmation process described in FIG. 12 is executed (step S1008). Information on presence / absence of MI beacon and ID information when there is a beacon response are stored in the memory 217 (step S1102). The information on the presence / absence of the MI beacon indicates whether there is a response to the MI beacon or whether the response time Ti has been exceeded.

When there is a MI-type beacon response, the power receiving apparatus 103 has determined the power transmission method for the MI method, and therefore stops the MI-type power transmission for a certain period of time (step S1103). Alternatively, if there is a stop beacon indicating power transmission stop, the power receiving apparatus 103 that has been determined to be in the MI system is returned to the initial state by transmitting the stop beacon.

Then, the MR method confirmation process described with reference to FIG. 12 is executed (step S1009). Information on presence / absence of MR beacon and ID information when there is a beacon response are stored in the memory 217 (step S1104). The information on the presence / absence of the MR beacon indicates whether there is an MR beacon response or the response time Tr has not been exceeded.

When there is an MR beacon response, the power receiving apparatus 103 corresponding to the plurality of methods has determined the power transmission method in the MR method, and therefore stops the MR method power transmission for a certain period of time (step S1105). Alternatively, the power receiving apparatus 103 that has been determined to be in the MR system is returned to the initial state by transmitting a stop control command indicating power transmission stop from the wireless unit 202 to the power receiving apparatus 103 that supports multiple systems via the antenna 201.

The control unit 203 reads the information from the memory 217 and confirms whether or not there is a MI or MR beacon response (step S1106). If there is a beacon response only for the MI system, the process proceeds to step S1108, and if there is a beacon response for only the MR system, the process proceeds to step S1109. If there is no beacon response, the process proceeds to step S1110. If there is a beacon response in both the MI and MR systems, the process proceeds to step S1111 (step S1107).

If the charging capacity of the power receiving apparatus is greater than the capacity that can be supplied by the power transmitting apparatus, supply disable processing is performed here.

If there is a beacon response for only the MI system, it is determined that the MI system power receiving apparatus 102 is placed on the power transmission stand 213, and the process of FIG. 6 is performed (step S1108). When there is a beacon response only in the MR system, it is determined that the MR power receiving apparatus 101 is placed on the power transmission stand 213, and the process of FIG. 8 is performed (step S1109).

If there is no beacon response, it is determined that the object placed on the power transmission stand 213 is a foreign object, wireless power is not transmitted, and a foreign object is displayed on a display unit (not shown) or the like (step S1110).

If there is a beacon response in both the MI method and the MR method, it is determined that the power receiving apparatus 103 corresponding to both the MR method and the MI method is placed on the power transmission stand 213 (step S1111).

For the MI method and MR method, information such as the charging amount of the power receiving device is obtained as the charging information in FIGS. 6 and 8, respectively, and the charging amount required by the power receiving device and the ability to transmit wireless power from the power transmitting device 104 Compared with the above, transmission efficiency that can be calculated from the amount of power transmitted from the power transmission device 104 and the amount of charge, etc., wireless power can be transmitted and transmitted.

As described above, according to the processing flow of FIG. 13, when charging the power receiving apparatus 103 that supports a plurality of systems, it is possible to select and charge a system with better transmission efficiency. Thereby, charging time can be shortened.

(Embodiment 3)
<Configuration example of power transmission device and power reception device>
FIG. 14 is an explanatory diagram showing an example of the power transmitting device 104 and the power receiving devices 101 to 103 according to the fourth embodiment.

In this case, the power transmission device 104 includes three power transmission tables 213a, 213b, and 213c. The power transmission bases 213a, 213b, and 213c are provided with MI system power transmission coils 211a, 211b, and 211c and MR system power transmission coils 207a, 207b, and 207c, respectively.

In the example of FIG. 14, a total of three MI or MR power receiving devices can be charged. On the power transmission tables 213a, 213b, and 213c, one power receiving device is mounted. The antenna 201 and the radio unit 202 used in the MR system perform communication for three systems.

<Configuration example of power transmission device>
FIG. 15 is a block diagram illustrating an example of the configuration of the power transmission device 104 in FIG.

15 includes a configuration having a plurality of power transmission systems. Here, the power transmission apparatus includes the MR power supply unit 204, the MI power supply unit 208, the matching units 205 and 209, the capacitors 206 and 210, and the MR power transmission coil 207 shown in FIG. , An MI transmission coil 211, an object detection unit 214, and a demodulation unit 212.

As described above, the power transmission device 104 in FIG. 15 can charge up to a total of three power reception devices, and therefore the power transmission device 104 in FIG. 15 has a configuration in which three power transmission devices, that is, three power transmission devices are provided. Each system is indicated by subscripts a, b, and c.

<Other configuration examples of the power transmission device>
FIG. 16 is an explanatory diagram illustrating another example of the power transmission device 104 in FIG. 15.

16 also has a configuration having a plurality of power transmission systems. In this case, the power transmission device 104 includes the capacitors 206 and 210, the MR power transmission coil 207, the MI power transmission coil 211, the object detection unit 214, and the MR / MI power supply in FIG. A plurality of power transmission systems each including a unit 215 and a demodulation unit 212; In the example of FIG. 16, it has three power transmission systems, and each system is shown by subscript a, b, c.

<Configuration example of power transmission device>
FIG. 17 is an explanatory diagram illustrating another example of the power transmission device 104 in FIG. 16.

The power transmission device 104 in FIG. 17 includes the MR power supply unit 204 and the MI power supply unit 208 in FIG. 2A of the first embodiment as one system, respectively. The power amount of each system in each system is adjusted. Here again, the respective systems are indicated by subscripts a, b and c.

<Other configuration examples of the power transmission device>
FIG. 18 is an explanatory diagram illustrating another example of the power transmission device 104 in FIG.

The power transmission apparatus 104 shown in FIG. 18 has the MR / MI power supply unit 215 shown in FIG. 2B as one system, and an adjustment unit 1301 newly provided for each system uses each system power amount. Is to adjust. Here again, the respective systems are indicated by subscripts a, b and c.

<Operation example of power transmission device>
FIG. 19 is a flowchart illustrating an example of wireless power transmission by the power transmission device 104 of FIG.

The processing flow in FIG. 19 is based on the processing flow in FIG. 12 of the first embodiment, and shows processing for a plurality of power receiving apparatuses.

As described above, one power receiving device is mounted on each of the power transmission stands 213a to 213c in FIG. Therefore, the processing from steps S1002 to S1007 in FIG. 12 may be executed in the power transmission bases 213a, 213b, and 213c, respectively (steps S1000a, S1000b, and S1000c).

Here, in the case of the power transmission device 104 shown in FIG. 14, the operation of detecting whether the MI method or the MR method is performed independently. At the same time, when the power receiving devices are placed on the power transmission bases 213a, 213b, and 213c, the method detection processing is performed on each power receiving device.

However, when power is transmitted from the power transmission bases 213a, 213b, and 213c at the same time, or an MR recognition signal is output, they may interfere with each other and erroneously detect the power receiving device. .

Therefore, the power transmission bases 213a, 213b, and 213c do not perform the detection operation at the same time but perform the detection operation at different timings. Such control is performed by the control unit 203.

As described above, according to the processing flow of FIG. 19, the same effect as in the case of FIG. 12 can be obtained independently in each system. In addition, when a plurality of power receiving devices are simultaneously mounted on the power transmission bases 213a, 213b, and 213c, the timing of the method detection processing is shifted, so that the detection signals do not interfere with each other and the power receiving devices can be accurately operated. It is possible to detect, and failure to charge can be reduced.

<Other operation examples of power transmission device>
FIG. 20 is a flowchart illustrating another example of the wireless power transmission of FIG.

The flowchart of FIG. 20 shows processing for a plurality of power receiving devices by the power transmitting device 104 of FIG. 14, and is based on the processing flow of FIG.

Similarly, since one power receiving apparatus is mounted on each of the power transmission tables 213a, 213b, and 213c, the processes from steps S1002 to S1105 in FIG. 13 are performed as the power transmission tables 213a, 213b, and 213c. Each step may be executed (steps S1100a, s1100b, s1100c).

And the control part 203 reads from the memory 217 and confirms the presence or absence of the beacon response of each system MI system and MR system (step S1502). First, in each system, when there is a beacon response only in the MI method, there is a beacon response only in the MR method, there is no beacon response, and there is a beacon response in both the MI method and the MR method. Classify.

If there is no beacon response, the object placed on each of the power transmission stands 213a, 213b, 213c is judged as a foreign object, and wireless power is not transmitted only at the judged power transmission stands 213a, 213b, 213c, not shown. Display foreign objects on the display.

If there is a beacon response for only the MI method or the MR method, confirm that the charging capacity can supply power based on the ID information. When the charging capacity of the power receiving apparatus is greater than or equal to the capacity that can be supplied by the power transmitting apparatus 104, supply disable processing is performed. When power supply is possible, the transmission system is determined by the system that has determined the beacon response in the processes of steps S1503a, S1503b, and S1503c.

When there is a beacon response in both the MI method and the MR method, it is determined that the power receiving apparatuses 103 corresponding to both the MR method and the MI method are mounted on the power transmission bases 213a, 213b, and 213c, respectively. .

For the MI method and MR method, information such as the charging amount of the power receiving device is obtained as the charging information described with reference to FIGS. 6 and 8, and the charging amount required by the power receiving device and the wireless power from the power transmitting device 104 are obtained. And the transmission efficiency that can be calculated from the amount of power transmitted from the power transmission device 104 and the amount of charge.

In particular, when the MR power supply unit 204 and the MI power supply unit 208 are separated as in the configuration of the power transmission device 104 shown in FIG. 17, the MR system or MI system power supply of all systems. Sum the amount.

Then, the power transmission method of the power receiving apparatus 103 corresponding to both the MR method and the MI method is selected and transmitted so that both the MR power supply unit 204 and the MI power supply unit 208 do not have excessive power supply. Wireless power transmission is possible within a range that does not cause excessive power supply, and a method with high transmission efficiency is selected to perform power transmission processing.

As described above, according to the processing flow of FIG. 20, when power is supplied to the multi-system power receiving apparatus 103, the power supply of the MR power supply unit 204 and the MI power supply unit 208 is not excessive, and the transmission efficiency is increased. A good method can be selected. Thereby, it can charge efficiently.

In addition, according to the power transmission device 104 of FIG. 15, since all systems have the MR power supply unit 204 and the MI power supply unit 208, an optimum design specialized for the narrow band of each frequency. It can be set as the electric power supply part.

In addition, according to the power transmission device 104 of FIG. 16, by using the MR / MI power supply unit 215 that combines MR power supply and MI power supply, the number of output amplifiers to be used can be reduced. Thereby, the circuit configuration of the MR / MI power supply unit 215 can be simplified. As a result, cost reduction of the power transmission device 104 can be realized.

17, the MR power supply unit 204 and the MI power supply unit 208 can be configured in one system, so that the power transmission device 104 can be made cost.

According to the power transmission device 104 of FIG. 18, the power transmission device 104 can be configured with one system of the MR / MI power supply unit 215, so that the power transmission device 104 can be provided at a lower cost than the power transmission device 104 of FIG. 16. Can do.

In the power transmission device 104 of FIG. 14, the object detection unit 214 is provided for each of the power transmission bases 213a, 213b, and 213c. However, the number of the object detection unit 214 may be one.

In that case, since there is no beacon response in the system where no object is placed, wireless power transmission does not occur in that system. When there is no beacon response in all systems, foreign matter detection and abnormality display may be performed.

(Embodiment 4)
<Configuration example of power transmission device and power reception device>
FIG. 21 is an explanatory diagram showing an example of the power transmitting device 104 and the power receiving devices 101 to 103 according to the fourth embodiment.

21 is different from FIG. 14 of the third embodiment in the number of MR system power transmission coils 207. In the power transmission device 104 in FIG. 14, the MR power transmission coil 207 is provided in each of the power transmission tables 213 a, 213 b, and 213 c, but in the power transmission device 104 in FIG. 213a, 213b, and 213c are provided. The MI system power transmission coils 211a, 211b, and 211c are provided on the power transmission tables 213a, 213b, and 213c, respectively.

The power transmission device 104 corresponds to a plurality of power reception devices, and in the example of FIG. 21, three MI-type power reception devices can be charged. The MR system can charge the MR power receiving apparatus until the power supply amount of the MR power supply unit 204 shown in FIG.

<Configuration example of power transmission device>
FIG. 22 is an explanatory diagram illustrating an example of the configuration of the power transmission device 104 in FIG. 21.

The power transmission device 104 in FIG. 22 has a configuration in which the MR power supply unit 204, the matching unit 205, the capacitor 206, and the MR power transmission coil 207 are one system in the power transmission device 104 shown in FIG. 15 of the third embodiment. Consists of. Other configurations are the same as those in FIG.

The processing flow of wireless power transmission by the power transmitting device 104 in FIG. 22 is basically the same as the flowchart in FIGS. 19 and 20, but the MR power receiving device 101 and the power receiving device compatible with both the MR method and the MI method. 103 may be placed anywhere on the power transmission tables 213a, 213b, and 213c.

For example, the power receiving apparatus 101 and the power receiving apparatus 103 may be mounted on the power transmission stand 213a, and at this time, the power receiving apparatuses 101 and 103 are detected by any one of the object detection units 214a, 214b, and 214c.

Since the MR power supply system is one system as described above, the processing from steps 603 to S605 in FIG. 12 which is the MI confirmation processing of each system and the processing from steps 1008 to S1103 in FIG. 13 which is the MI system processing. After the above process is completed, the processes from steps S643 to S654 in FIG. 12, which are MR confirmation processes, are performed.

Alternatively, first, when an object is detected by any of the object detection units 214a, 214b, and 214c, MR confirmation processing and MR confirmation processing are performed, and then MI confirmation processing and MI method processing are performed in each system. It may be.

It is conceivable to process the shorter response time Ti or response time Tr first. However, in the case of the power transmission apparatus 104 corresponding to the plurality of systems in FIG. 22, when a foreign object is detected by the MR system, power transmission of wireless power is stopped, and all the MR system power receiving apparatuses 101 and the plurality of systems selected from the MR system are selected. The power reception of the corresponding power receiving apparatus 103 stops.

Therefore, by first performing the MI confirmation processing S and the MI method processing, the multi-system power receiving apparatus 103 can be operated by the MI method, and the influence of the wireless power transmission stoppage by the MR method is minimized. be able to.

As described above, according to the power transmission device 104 in FIG. 22, the MR power receiving device 101 or the multi-system power receiving device 103 corresponding to each of the MR method and the MI method can be charged regardless of the location on the power transmission stand 213. It can be performed. Thereby, the convenience for the user can be further improved.

Also. Since one MR MR power supply unit 204 can be configured, there is an effect that the number of output amplifiers can be reduced, and cost reduction can be realized.

FIG. 22 shows an example in which the object detection unit 214 is provided in each of the power transmission bases 213a, 213b, and 213c. However, there is only one object detection unit 214, and the object detection unit 214 is placed on the charging base. The detected object may be detected.

In this case, a system in which no object is placed does not have a beacon response, so wireless power transmission does not occur in that system. When there is no beacon response in all systems, foreign matter detection and abnormality display may be performed.

(Embodiment 5)
<Configuration example of power receiving device and power transmitting device>
FIG. 23 is an explanatory diagram showing an example of the configuration of power reception devices 101 to 103 and power transmission device 104 according to the fifth embodiment.

23, the power transmission device 104 corresponds to a plurality of power reception devices, and the power transmission stand 213 has the same configuration as that of FIG. 3 of the first embodiment. In the example of FIG. 23, two MI-type power receiving devices can be charged. In the MR method, the MR-type power receiving device until the power supply amount of the MR power supply unit 204 is maximized as in FIG. Can be charged.

In this case, the power transmission device 104 includes an MR power supply unit 204, MI power supply units 208a and 208b, matching units 205, 209a, and 209b, capacitors 206, 210a, and 210b, and demodulation units 212a and 212b, as illustrated. Have

As described above, since the power transmission device 104 in FIG. 23 can charge two MI-type power reception devices, the MI power supply unit 208b and the matching unit 209b are added to the configuration of the power transmission device 104 in FIG. The capacitor 210b and the demodulator 212b are the same as those newly provided.

As described with reference to FIG. 9, the power transmission device 104 is located at any position on the power transmission stand 213 where the MI power reception device 101 or the multi-system power reception device 103 corresponding to both the MR method and the MI method is placed. It is possible to transmit the wireless power by selecting the MI-system power transmission coil 211 corresponding to the above.

23. The processing flow of wireless power transmission by the power transmission device 104 in FIG. 23 is basically the same as that in FIGS.

As described above, according to the power transmission device 104 of FIG. 23, any power reception device of the MR power reception device 101, the MI power reception device 102, and the power reception device 103 compatible with both the MR method and the MI method can be used. The battery can be charged satisfactorily regardless of the position where it is placed.

In addition, in the power transmission stand 213 in FIG. 23, the composite coil 301 including a plurality of MI system power transmission coils is used. However, for example, the position of the MI system power receiving apparatus 102 is searched and the power transmission coil is moved to transmit wireless power. A movable power transmission coil may be used.

(Embodiment 6)
<Configuration example of power transmission device and power reception device>
FIG. 24 is an explanatory diagram illustrating an example of a configuration of the power transmission device 104 according to the sixth embodiment. FIG. 25 is an explanatory diagram illustrating an example of a configuration of the power receiving device 103 that receives power transmitted from the power transmitting device 104 in FIG. 24.

The power transmission device 104 in FIG. 24 has a configuration in which a correspondence recognition unit 1901 is newly provided in the configuration of the power transmission device 104 in FIG. The correspondence recognition unit 1901 recognizes the multi-system correspondence information output from the correspondence identification unit 2001 included in the power receiving apparatus 103 in FIG.

The power receiving apparatus 103 in FIG. 25 outputs correspondence information indicating that the power receiving apparatus 103 itself supports both systems to the power receiving apparatus 103 that supports both the MR system and the MI system. The unit 2001 is newly provided.

<Operation example of power transmitting device and power receiving device>
FIG. 26 is a flowchart illustrating an example of an operation of wireless power transmission by the power transmission device 104 of FIG. 24 and the power reception device 103 of FIG.

When the power transmission process by the power transmission apparatus 104 starts (step S2101), the object detection unit 214 detects that an object is placed on the power transmission table 213 (step S2102).

Subsequently, the control unit 203 receives the detection signal from the object detection unit 214 and confirms whether or not the object placed on the power transmission stand 213 supports a plurality of systems by controlling the wireless unit 202 ( Step S2103).

The control unit 203 receives the multi-system correspondence information at the wireless unit 202 via the antenna 201, recognizes the multi-system correspondence of the power receiving apparatus 103 based on the recognition result of the correspondence recognition unit 1901, and performs the process of step S1008. Move on. If it cannot be recognized for a certain period of time, the process proceeds to step S1001 or step S1101.

When the power receiving process of the power receiving apparatus 103 starts (step S2121), the wireless unit 407 receives the confirmation result by the process of step 2103 via the antenna 408. The control unit 406 confirms from the received confirmation result that the power transmitting apparatus 104 recognizes that it supports a plurality of systems (step S2122).

Then, the control unit 406 transmits the ID information read from the memory 217 from the wireless unit 407 via the antenna 408. At this time, if the battery 405 does not have enough power to operate the wireless unit 407 and the control unit 406, the multi-system correspondence information cannot be transmitted to the power transmitting apparatus 104. In the process of step S2103, steps S1008 to S1008 in FIG. The process proceeds to S1103 and steps S1009 to S1105.

Subsequently, MI method confirmation processing is executed (step S1008). This MI method confirmation processing is processing from steps S603 to S605 in FIG. When the MI beacon responds (step S2123), the power receiving apparatus 103 is returned to the initial state without determining the power transmission method. Alternatively, MR beacon response is prepared.

The control unit 203 stores in the memory 217 the presence or absence of an MI beacon indicating whether there is an MI beacon response and no MI beacon response even if the response time Ti is exceeded, and ID information when there is a beacon response (step S1102). ).

At this time, ID information has already been obtained from the power receiving apparatus 103 having the correspondence identifying unit 2001, and is associated with the multi-system correspondence information. Therefore, here, the process is performed by the power receiving apparatus without the correspondence identifying unit 2001.

Subsequently, MR method confirmation processing is executed (step S1009). This MR method confirmation processing is processing from steps S643 to S645 in FIG. When an MR beacon response is made (step S2124), a request from the power transmission device 104 is waited without determining the power transmission method.

The control unit 203 stores in the memory 217 the presence / absence of an MR beacon indicating whether there is an MR beacon response or whether the response time Tr has been exceeded, and ID information when there is a beacon response (step S1104).

At this time, since the ID information has already been obtained from the power receiving apparatus 103 having the correspondence identifying unit 2001, it is associated with the multi-system correspondence information. Therefore, here, the processing is performed by the power receiving apparatus without the multi-system identification unit 2001. The control unit 203 reads the information from the memory 217 and confirms whether or not there is a beacon response of each system MI method and MR method (step S1106).

Thereafter, in each system, when there is a beacon response only for the MI method, when there is a beacon response only for the MR method, when there is a beacon response for both the MI method and the MR method, and when there are multiple beacons according to the plural method correspondence information. A classification is made when the system correspondence is recognized (step S2104).

If there is a beacon response for only the MI method or the MR method, confirm that the charging capacity can supply power based on the ID information. If the charging capacity of the power receiving apparatus is greater than or equal to the capacity that can be supplied by the power transmitting apparatus 104, supply disable processing is performed here. When the power can be supplied, the system having the beacon response is determined by each system, and the process proceeds to the power transmission process.

When there is a beacon response in both the MI method and the MR method, it is determined that the power receiving apparatus 103 corresponding to both the MR method and the MI method is placed on the power transmission stand 213. At this time, the determined number of power receiving apparatuses 103 includes the number of power receiving apparatuses whose multi-system support is recognized by the multi-system support information. If the number is the same, all of the power receiving apparatuses are recognized to support the plurality of systems by the plurality of systems support information.

If the number of power receiving devices 103 determined is large, there is a power receiving device 103 that does not support multi-system support information. In this case, first, control information for determining a power receiving method is transmitted from the power transmitting device 104 to the power receiving device 103 by the wireless unit 202 and the wireless unit 407 to the power receiving device 103 that has been recognized as supporting the plural methods by the multiple method supporting information.

In addition, in the example of FIG. 24, the positional relationship of the power receiving apparatus that is recognized as compatible with the plurality of systems can be grasped from the position of the coil that transmits power by the MI method and the information about the plurality of systems. Detailed control information is transmitted from the power transmission apparatus 104 to the power receiving apparatus 103 whose multi-system support information is recognized by the multi-system support information from the wireless unit 202 via the antenna 201 and received by the wireless unit 407 via the antenna 408. Therefore, the power receiving apparatus can be controlled even when charging is performed by the MI method.

Using the control technique described above, as with the process of FIG. 20, for the MI method and MR method, information such as the charge amount of the power receiving device is obtained as the charging information of FIGS. 6 and 8, and the power receiving device is required. And a transmission efficiency that can be calculated from the amount of power transmitted from the power transmission device 104 and the amount of charge.

When the MR power supply unit 204 and the MI power supply unit 208 are separated as in the configurations of the power receiving apparatus 103 and the power transmission apparatus 104 in FIG. 23, the power supply for each MR system or MI system of all systems is provided. Sum the amount. Then, in order to prevent both the MR power supply unit 204 and the MI power supply unit 208 from having an excessive power supply, the system determination of the power receiving apparatus 103 in which the plurality of system support information is recognized based on the plurality of system support information is performed.

Subsequently, the power transmission method of the power receiving apparatus 103 that supports both the MR method and the MI method is selected and transmitted. Then, a power transmission process is performed by selecting a method capable of wireless power transmission and transmission and having high transmission efficiency within a range that does not cause excessive power supply.

Thereby, the power receiving apparatus 103 determines the power transmission method (step S2125). Power transmission is started in each power transmission system by the power transmission method determined in step S2104 (step S2106).

The charging of the battery 405 is started by the power receiving method of each system (step S2127). The power transmitting apparatus 104 checks the charging status from each power receiving apparatus (steps S2107 and S2128).

The control unit 203 determines whether charging is in progress or the end of charging based on the information corresponding to the charging status (step S2108). Further, the abnormal state is determined based on information indicating that the information corresponding to the charging status is not received or information indicating abnormality from the power receiving apparatus.

When charging, the control unit 203 checks the charge amount of the power receiving device or the charge amount required by the power receiving device, and controls the MR power supply unit 204 or the MI power supply unit 208 to perform wireless power transmission. The amount is adjusted (step S2109). Thereafter, the process returns to step S2107.

When it is determined that the control unit 203 is in an abnormal state and no information corresponding to the charging state arrives, it is determined that the power receiving device has been removed from the power transmission stand 213 during charging (step S2112). In the case of information indicating an abnormality from the power receiving device, the abnormality of the power receiving device is recognized. Note that information from the object detection unit 214 can also be used for recognition when the power receiving device is removed from the power transmission stand 213 during charging.

The control unit 203 controls the MR power supply unit 204 or the MI power supply unit 208 to stop wireless power transmission, and when the power receiving apparatus recognizes an abnormality, displays the abnormality on a display unit (not shown) or the like (step) S2113). When the charging status is charging completion, information corresponding to charging completion is transmitted to the power transmission device 104 (step S2129).

When the information corresponding to the end of charging arrives from the power receiving apparatus in each system, the control unit 203 controls the MR power supply unit 204 or the MI power supply unit 208 to stop wireless power transmission and illustrates the completion of power transmission. It displays on the display part etc. which do not (step S2114).

The controller 406 controls the DC-DC converter 404 to stop charging the battery 405. Thereby, the charging operation of the power receiving apparatus is completed (step S2131).

As described above, according to the processing flow of FIG. 26, between the power transmission apparatus 104 and the power receiving apparatus 103 corresponding to the multiple system correspondence information, the MI system end process that is the process of step S <b> 1103 of FIG. 13 and the process of step S <b> 1105 of FIG. The MR system termination process, which is a process, becomes unnecessary, and information can be exchanged or controlled between the power transmitting apparatus and the power receiving apparatus using a unique protocol.

Thereby, the processing time of beacon response can be shortened. Also. The power receiving apparatus 103 can grasp the positional relationship between the MI power transmission coil and the response power receiving apparatus by the MI beacon response.

It should be noted that it is obvious that the same effect can be obtained even if a correspondence recognition unit 1901 is newly provided in the power transmission device 104 of FIGS. 15 and 22.

(Embodiment 7)
<Configuration example of power transmission device and power reception device>
FIG. 27 is an explanatory diagram showing an example of the configuration of the power transmission device 2201 according to the seventh embodiment. FIG. 28 is an explanatory diagram illustrating an example of a configuration of the power receiving device 2311 that receives power transmitted from the power transmitting device 2201 of FIG.

FIG. 27 assumes a power transmission technique based on a new method (hereinafter referred to as a third method) different from the power transmission based on the MI method and the power transmission based on the MR method described in the first to sixth embodiments.

27 (a) and 27 (b) show examples corresponding to the power transmission technology based on the MI method and the MR method and the third method described above. Moreover, the power transmission apparatus 2201 illustrated in FIG. 27C illustrates an example corresponding to only the third method.

In the power transmission device 2201 in FIG. 27A, a new functional block corresponding to the third method is provided in the configuration of the power transmission device 104 in FIG. New functional blocks are a third method power supply unit 2213, a matching unit 2214, a capacitor 2215, a third method correspondence recognition unit 2211, and a power transmission coil 2212.

27 (b) has a configuration in which the power transmission coil 2212 and the third system power supply unit 2213 are removed from the configuration of the power transmission device 2201 in FIG. 27 (a). In addition, the power transmission device 2201 in FIG. 27C has a configuration in which only a new functional block corresponding to the third method is left from the power transmission device in FIG.

The third method correspondence recognition unit 2211 indicates to the power receiving device that the power transmission device 2201 is compatible with the third method and recognizes the power receiving device compatible with the third method.

In FIG. 27A, a newly provided power transmission coil 2212 is a power transmission coil corresponding to the third power transmission method. The third method power supply unit 2213 receives the control of the amount of power supplied from the control unit 203, and the frequency fn defined by the third method in the power transmission coil 2212 via the matching unit 2214 and the capacitor 2215. Then, the power amount set by the control unit 203 is output. Then, wireless power is output from the power transmission coil 2212.

The matching unit 2214 matches the impedance between the preceding stage and the subsequent stage of the matching unit 2214 while the power transmission device 2201 transmits wireless power.

The capacitance value of the capacitor 2215 is a value that causes series resonance at the inductance value of the power transmission coil 2212 for the third system and the frequency fn of the transmission power of the third system. In the third method, either the wireless unit 202, the transmission system of the antenna 201, or the transmission system using the demodulation unit 212 may be used for transmission with the power receiving apparatus.

As described above, according to the power transmission device 2201 of FIG. 27A, power transmission can be performed using the optimal power transmission coil for all of the MI method, the MR method, and the third method. Thereby, it is possible to improve the power transmission efficiency in any of the MI system, MR system, and third system.

The power transmission device 22012 in FIG. 27B is configured to be shared with the MI power transmission coil 211 or the MR power transmission coil 207 without providing a third power transmission coil.

For example, when the frequency fn of the transmission power of the third system is close to the frequency fi of the MI system, the MI system power transmission coil 211 is shared. Alternatively, when the frequency fn of the transmission power of the third system is close to the frequency fr of the MR system, the MR power transmission coil 207 is shared.

In some cases, in the MI method or MR method and the third method, the capacitance value of the capacitor 210 or the capacitor 206 is changed by the control unit 203 so that the inductor value or MR of the MI method power transmission coil 211 is changed. The resonance frequency determined by the inductor value of the system power transmission coil 207 may be switched between fi and fn, or fr and fn, respectively.

According to the power transmission device 2202 of FIG. 27B, since the number of new power transmission coils and functional blocks corresponding to the third method can be reduced, cost reduction and space saving of the power transmission device 2201 can be achieved. Can be realized.

The power transmission device 2203 in FIG. 27C has a configuration that supports only power transmission by the third new method as described above. In the power transmission device 2201 in FIG. 27C, the transmission system of the wireless unit 202 and the antenna 201 is used for transmission with the power receiving device.

The third method power supply unit 2213 receives the control of the amount of power supplied from the control unit 203 and supplies the third new method power transmission coil 2212 to the third method via the matching unit 2214 and the capacitor 2215. The amount of power set by the control unit 203 is output at the frequency fn. Then, wireless power is output from the power transmission coil 2212 for the third method. The capacitance value of the capacitor 2215 is a value that causes series resonance at the inductance value of the third system power transmission coil 2212 and the frequency fn of the third system power transmission power.

According to the power transmission device 2201 of FIG. 27 (c), the power transmission device 2201 corresponding to the third method can be provided at low cost because it is configured with only functional blocks corresponding to the third method.

FIG. 28 is an explanatory diagram illustrating an example of a configuration of the power receiving device 2231 that receives the power transmitted from the power transmitting device 2201 of FIG.

The power receiving apparatus 2231 in FIG. 28A is provided with a new functional block corresponding to the third method in the configuration of the power receiving apparatus 103 in FIG. The new functional blocks are a third system correspondence identifying unit 2303, a capacitor 2302, and a third system power receiving coil 2301.

28 (b) has a configuration in which the capacitor 2302 and the third system power receiving coil 2301 are removed from the power receiving device 2311 of FIG. 8 (a). The power receiving device 2311 in FIG. 28C has a configuration in which only a new functional block corresponding to the third method is left from the power transmitting device in FIG.

The third method correspondence identifying unit 2303 which is a correspondence recognition unit stores third method correspondence information indicating to the power transmission device that the power receiving device 2311 is compatible with the third method.

In the power receiving device 2311 shown in FIG. 28 (a), the third system power receiving coil 2301 is a power receiving coil corresponding to the third power transmission system.

The rectifying unit 2302 rectifies the power received by the MR system power receiving coil 401, the MI system power receiving coil 411, and the third system power receiving coil 2301, and outputs the rectified power to the DC-DC converter 404.

The recognition unit 409 monitors the input power or output power of the rectification unit 414 and recognizes the presence or absence of a beacon and the type of beacon indicating the MR method, the MI method, or the third method. Then, the system information indicating which power is received by the MR system, the MI system, or the third system is output to the control unit 406.

The control unit 406 recognizes a method in which wireless power is transmitted from the method information output from the recognition unit 409, and thereafter uses the function block of the recognized method to exchange information or information with the power transmission apparatus. The battery 405 is charged by transmission.

The battery 405 supplies power to a functional block included in a mobile terminal device including the power receiving device 2311. The capacitance value of the capacitor 2302 is a value that causes series resonance at the inductance value of the third system power transmission coil 2301 and the frequency fn of the third system power transmission power. In the third method, either a transmission system using the radio unit 407 and the antenna 408 or a transmission system using the load modulation unit 413 may be used for transmission with the power transmission apparatus.

As described above, according to the power receiving device 2311 of FIG. 28A, the power receiving coil having the optimum configuration can be used for all of the MI method, the MR method, and the third method. Thereby, power reception efficiency can be improved.

The power receiving device 2311 of FIG. 23B is not provided with a new power receiving coil for the third system, but is shared by the MI system power receiving coil 411 or the MR system power receiving coil 401.

For example, when the frequency fn of the transmission power of the third system is close to the frequency fi of the MI system, the MI-system power receiving coil 411 can be shared. When the frequency fn is close to the MR frequency fr, the MR power receiving coil 401 can be shared.

In some cases, the control unit 406 changes the capacitance value of the capacitor 412 or the capacitor 402 by the MI method or MR method and the third method, respectively, so that the inductor value of the MI method receiving coil 411 or the MR method is used. The resonance frequency determined by the inductor value of the power receiving coil 401 may be switched between the frequency fi and the frequency fn, or between the frequency fr and the frequency fn.

As described above, according to the power receiving device 2311 of FIG. 28B, it is possible to suppress the addition of new components such as a new power receiving coil and a functional block. Thereby, the power receiving device 2311 corresponding to the third method can be reduced in cost and space.

The power receiving device 2311 in FIG. 28 (c) is an example corresponding only to the third type of power transmission. The power receiving device 2311 in FIG. 28C is a combination with the power transmission terminal 2203 in FIG. 27C, and uses the transmission system of the radio unit 407 and the antenna 408 for transmission with the power transmission device 2203.

The wireless power of the third system received by the third system power receiving coil 2301 is output to the rectifying unit 403 via the capacitor 2302. The capacitance value of the capacitor 2302 is a value that causes series resonance at the inductance value of the third system power receiving coil 2301 and the frequency fn of the transmission power of the third system.

The rectification unit 403 rectifies the received power and charges the battery 405 via the DC-DC conversion unit 404. The battery 405 supplies power to a functional block included in a mobile terminal device including the power receiving device 2311.

As described above, according to the power receiving device 2311 of FIG. 28C, a power receiving device corresponding to the third method can be provided at low cost.

27 and 28 show the configurations of the power transmitting device and the power receiving device corresponding to the power transmission of the third method, respectively. However, in the power transmission processing with the configurations shown in FIGS. As a process of this method, a process equivalent to the MI system confirmation process S1008 which is the process of step S1008 in FIG. 13 and the MR system confirmation process which is the process of step S1009 may be newly added.

At this time, since the third method is later, there is a possibility that the method is superior to the previous one, so the processing of the third method may be performed first. In the case of the power transmission process shown in FIGS. 27B and 27B, the MI-type beacon response that is the process in step S1008 in FIG. 13 or the MR-type beacon response that is the process in step S1009 is shown in FIG. In this case, a beacon response of the third method can also be detected.

<Operation example of power transmitting device and power receiving device>
FIG. 29 is a flowchart illustrating an example of wireless power transmission / reception processing by the power transmission device 2201 of FIG. 27 and the power reception device 2311 of FIG.

In FIG. 29, the third method correspondence recognition unit 2211 and the correspondence identification unit 2303 are used to recognize that wireless power is transmitted preferentially by the third method, and the wireless power is transmitted by the third method. The processing flow in the case of transmission is shown. The same symbols as those in FIG. 26 indicate the same processes.

When the power transmission process of the power transmission device 2201 starts (step S2401), the object detection unit 214 detects that an object is placed on the power transmission table 213 (step S2402).

The control unit 203 receives the detection signal from the object detection unit 214 and checks whether or not the object placed on the power transmission stand 213 is compatible with the third method (step S2403). When the correspondence information of the third method is received by the wireless unit 202 via the antenna 201, the third method correspondence recognition unit 2211 recognizes that the power receiving device 2311 is compatible with the third method.

The recognition result is output to the control unit 203. Thereby, the control part 203 moves to the power transmission process by a 3rd system. When it cannot recognize for a certain fixed time, it transfers to the beacon response process of FIG. 5 which is a normal process.

When the power receiving process by the power receiving apparatus 2311 starts (step S2421), the wireless unit 407 receives a confirmation request as to whether or not the third method is supported via the antenna 408. Then, the control unit 406 obtains the third method correspondence information from the third method correspondence identifying unit 2303, and transmits the third method correspondence information from the wireless unit 407 via the antenna 408 (step S242).

Subsequently, the control unit 406 transmits the ID information read from the memory 217 from the wireless unit 407 via the antenna 408. Thereafter, a power receiving process according to the third method is performed.

At this time, if the battery 405 does not have enough power to operate the wireless unit 407 and the control unit 406, the third method correspondence information cannot be transmitted to the power transmission device. In the process of step S2403, FIG. The process proceeds to steps S1008 to S1103 and steps S1009 to S1105.

As described above, according to the power transmission / reception processing of FIG. 29, since it is possible to recognize that the transmission device 2201 and the receiving end 2311 support the third method without a beacon response, the processing protocol unique to the third method is used. It is possible to move in a short time.

(Embodiment 8)
<Configuration example of power transmission device and power reception device>
FIG. 30 is a conceptual diagram illustrating an example of a power transmission device 2501 and a power reception device 2500 according to the eighth embodiment.

FIG. 30 shows a usage example of the power receiving device and the power transmitting device corresponding to the wireless power transmission of the third method by the processing of the flowchart of FIG. 29 of the seventh embodiment.

30, the power transmission device 2501 transmits wireless power to the three power reception devices 2500, respectively. At this time, wireless power transmission control is performed from the power receiving device 2500 to the power transmission device 2501.

<Example configuration of power receiving device>
FIG. 31 is an explanatory diagram illustrating an example of a configuration of the power receiving device 2500 of FIG.

A power receiving device 2500 shown in FIG. 31 is based on the power receiving device 2311 in FIG. 28C, and has a configuration in which a terminal usage information unit 2601 is newly provided in the power receiving device 2311 in FIG. . The terminal usage information unit 2601 stores terminal usage information. Note that it is obvious that the terminal usage information unit 2601 can be provided in the power receiving device 2311 in FIGS. 28A and 28B.

<Operation example of power transmitting device and power receiving device>
FIG. 32 is a flowchart illustrating an example of wireless power transmission processing by the power transmission device 2501 and the power reception device 2500 of FIG. Note that the same reference numerals as those in FIG. 29 indicate the same processes.

When the power receiving process of the power receiving apparatus 2500 starts (step S2701), the control unit 406 confirms that the power transmitting apparatus 2501 is compatible with the third method (step S2422). The power receiving apparatus 2500 exchanges information with the wireless unit 407 and performs information sharing (step S2702).

Here, the information exchange refers to, for example, the number of power receiving devices corresponding to the third method charged by the power transmitting device 2501 and the respective power receiving devices. In the example of FIG. 30, there are three power receiving apparatuses 2500.

Then, information exchange of terminal usage information of each power receiving device 2500 is performed. The terminal usage information includes charging information, schedule information, usage information, and the like. The charging information indicates a remaining charge amount of the battery 405 included in each power receiving device 2500. The schedule information is information on usage time such as every day, every week, every month when using the mobile terminal device having the power receiving device. The usage information is information such as future usage predictions of mobile terminal devices, e-mail information, and the like estimated from schedule information such as a scheduler.

The terminal usage information is stored in the terminal usage information unit 2601, and the control unit 406 updates it according to the usage status of the power receiving apparatus as needed. In FIG. 32, information exchange is shown as peer-to-peer, but any communication method may be used. Further, it may be performed via the power transmission device 2501.

Each power receiving device 2500 exchanges opinions such as charging priority, power transmission amount, and charging policy of power transmission time based on the terminal usage information (step S2703). The charging policy is determined by this exchange of opinions (step S2704). This opinion exchange may be performed by any method, for example, performed between the artificial intelligence software included in the control unit 406 of the power receiving apparatus 2500, giving priority to the latest version of the artificial intelligence software, or determining a majority decision.

The power receiving device 2500 instructs the power transmitting device to use the determined charging policy as power receiving policy information (step S2705). At this time, any power receiving apparatus may instruct, and in the process of step S2703, opinions are exchanged including this instruction method.

Each power receiving apparatus updates the situation as needed, and returns to the process of step S2702 (step S2706). By this. Information is always shared between the power receiving devices. If any abnormality is detected during charging, the power transmission device stops power transmission (steps S2707 and S2708).

Further, when charging is completed, the power transmission device 2501 is informed that power transmission has been completed, and an instruction to stop power transmission is given (step S2709).

As described above, according to the wireless power transmission process of FIG. 32, the power transmission apparatus 2501 is controlled from the power receiving apparatus 2500, so that the scale of software that controls the power transmission apparatus 2501 can be reduced.

In addition, it is possible to upgrade the software for wireless charging of the power receiving device 2500 at any time by a portable terminal device having the power receiving device 2500 or the like. Thereby, efficient wireless charging can always be performed by the latest control.

<Connection example of power transmission equipment>
FIG. 33 is an explanatory diagram illustrating an example of a network connection of the power transmission device 2501 of FIG.

33, a plurality of power transmission devices 2501 are connected to a power transmission management server 2801 via a network 2802. The network 2802 is a communication line such as an Internet line. Although FIG. 33 shows an example in which three power transmission devices 2501 are connected to the network 2802, the number of power transmission devices connected to the network 2802 is not particularly limited.

The connection between the power transmission apparatus 2501 and the network 2802 is made by a wireless communication technology such as WiFi (registered trademark). Alternatively, a wired connection may be used. The power transmission management server 2801 manages the power transmission devices 2501 connected to the network 2802, and can pass information such as the usage status of each power transmission device 2501.

For example, when a certain power transmission device 2501 exceeds the number that can be charged, and when another power transmission device 2501 is in a chargeable state, such a situation is displayed on the power transmission device 2501. Alternatively, it may be displayed on the power receiving device via communication between the power receiving device and the power transmitting device.

Of course, the information of the power transmission management server 2801 can be displayed on another information terminal or the like via the network 2802. Further, all power transmission devices that can transmit power from the amount of supplied power may be displayed.

Further, the power transmission management server 2801 can collect additional information such as which power receiving device is charged in which time zone in each power transmission device 2501. By accumulating such information, it is possible to notify a user who is regularly charged when he / she forgets to charge.

Or, it is possible to analyze information such as how many times the battery of which power receiving device has repeatedly charged. In that case, it is possible to inform the user of an appropriate battery replacement time. Thereby, a user's convenience can be improved.

As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

Note that the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.

Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. . In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 101 Power receiving apparatus 102 Power receiving apparatus 103 Power receiving apparatus 104 Power transmission apparatus 201 Antenna 202 Radio | wireless part 203 Control part 204 MR power supply part 205 Matching part 206 Capacitor 207 MR system power transmission coil 208 MI power supply part 209 Matching part 210 Capacitor 211 MI System power transmission coil 212 Demodulation unit 213 Power transmission stand 214 Object detection unit 215 MR / MI power supply unit 216 Matching unit 217 Memory 301 Synthetic coil 401 MR system power reception coil 402 Capacitor 403 Rectification unit 403 Radio unit 404 DC-DC conversion unit 405 Battery 406 Control unit 407 Radio unit 408 Antenna 409 Recognition unit 410 Memory 411 Power receiving coil for MI system 411 Power receiving coil 412 Capacitor 413 Load modulation unit 414 Rectification unit

Claims (17)

A power transmission device that performs wireless power transmission to a power receiving device corresponding to the first wireless power transmission method or the second wireless power transmission method mounted on a power transmission stand,
A first communication recognition unit that performs a first process of performing wireless communication with the power receiving device and recognizing whether the power receiving device is compatible with the first wireless power transmission method;
A second communication recognition unit that performs a second process of performing wireless communication with the power receiving device and recognizing whether the power receiving device is compatible with the second wireless power transmission method;
A power transmission device. The power transmission device according to claim 1,
The first processing executed by the first communication recognition unit is preset with a first detection response signal that responds to a first detection signal indicating that the first wireless power transmission method is supported. Recognizing that the power receiving device does not support the first wireless power transmission method when the power receiving device does not reply within the first response time to be
The second processing executed by the second communication recognition unit is preset with a second detection response signal that responds to a second detection signal indicating that the second wireless power transmission method is supported. A power transmitting device that recognizes that the power receiving device does not support the second wireless power transmission method when the power receiving device does not reply within the second response time. The power transmission device according to claim 2,
A control unit that controls operations of wireless power transmission according to the first wireless power transmission method and wireless power transmission according to the second wireless power transmission method;
The control unit is configured such that the power receiving apparatus supports both the first wireless power transmission method and the second wireless power transmission method by the first communication recognition unit and the second communication recognition unit. A power transmission device that stops wireless power transmission according to the first wireless power transmission method and the second wireless power transmission method for a preset time when recognized. The power transmission device according to claim 3, wherein
The first communication recognition unit or the second communication recognition unit obtains charging information indicating a capacity to be charged from the power receiving device when receiving the first detection response signal or the second detection response signal. And
The control unit is configured to transmit the first wireless power transmission based on the acquired charging information during a period in which wireless power transmission by the first wireless power transmission method and the second wireless power transmission method is stopped. A power transmission device that selects any one of the transmission method and the second wireless power transmission method and transmits the wireless power to the power receiving device. The power transmission device according to claim 4, wherein
The control unit exceeds a power supply capability of the power transmission device when wireless power transmission is performed to the plurality of power receiving devices corresponding to both the first wireless power transmission method and the second wireless power transmission method. A power transmission device that controls wireless power so that it does not exist. The power transmission device according to claim 1,
The first wireless power transmission method is a magnetic field resonance method,
The second wireless power transmission method is a power transmission device that is an electromagnetic induction method. The power transmission device according to claim 6, wherein
The power transmission stand is
A first power transmission coil for performing power transmission by the first wireless power transmission method;
A second power transmission coil for performing power transmission by the second wireless power transmission method;
Have
The second power transmission coil is a power transmission device provided inside the first power transmission coil. The power transmission device according to claim 6, wherein
The power transmission stand includes a plurality of power transmission coils having a pair of a first power transmission coil that performs power transmission according to the first wireless power transmission method and a second power transmission coil that performs power transmission according to the second wireless power transmission method. Have a group,
Each said 2nd power transmission coil is a power transmission apparatus each provided inside the said 1st power transmission coil. The power transmission device according to claim 8, wherein
The first communication recognizing unit and the second communication recognizing unit sequentially execute the first process and the second process for each power transmission coil group. The power transmission device according to claim 3, wherein
A correspondence recognizing unit for recognizing multi-system correspondence information transmitted from the power receiving device;
The control unit recognizes that the power receiving apparatus is compatible with both the first wireless power transmission method and the second wireless power transmission method based on a recognition result by the correspondence recognition unit,
The multi-system correspondence information is information indicating that the power receiving apparatus is compatible with both the first wireless power transmission system and the second wireless power transmission system. The power transmission device according to claim 3, wherein
A recognition unit for recognizing correspondence information transmitted from the power receiving device;
The correspondence information is information indicating that the power receiving device is compatible with a third wireless power transmission method,
The control unit is a power transmission device that recognizes that the power receiving device is compatible with the third wireless power transmission method based on a recognition result by the recognition unit. The power transmission device according to claim 11, wherein
The said control part is a power transmission apparatus which controls the charge priority with respect to the said several power receiving apparatus, the amount of power transmission, and power transmission time based on the charging policy information transmitted from the said power receiving apparatus. A power receiving device that receives power transmitted from a power transmitting device that performs wireless power transmission,
A first communication unit that wirelessly communicates with the power transmission device and receives a first response request from the power transmission device;
A second communication unit that wirelessly communicates with the power transmission device and receives a second response request from the power transmission device;
When the first response request is received, the power receiving device generates a first detection signal indicating that the power receiving device is compatible with the first wireless power transmission method and transmits the first detection signal from the first communication unit to the power transmitting device. Transmitting and generating a second detection signal indicating that the power receiving apparatus is compatible with the second wireless power transmission method when receiving the second response request, and generating the second detection signal from the second communication unit. A power reception control unit for transmitting to the power transmission device;
A power receiving device. The power receiving device according to claim 13.
A correspondence identifying unit that stores multi-system correspondence information indicating that the power receiving apparatus is compatible with both the first wireless power transmission system and the second wireless power transmission system;
The power reception control unit reads the multi-method correspondence information stored in the correspondence identification unit based on a request from the power transmission device, and reads the read multi-type correspondence information from the first communication unit to the power transmission. A power receiving device that transmits to a device. The power receiving device according to claim 13.
A third method correspondence identifying unit that stores new method correspondence information indicating that the power receiving device is compatible with a third wireless power transmission method;
When receiving a request from the power transmission device, the power reception control unit reads the new method correspondence information stored in a third method correspondence identifying unit, and reads the read new method correspondence information from the first communication unit. A power receiving device that transmits to a power transmitting device. The power receiving device according to claim 15,
Having a terminal usage information section for storing terminal usage information;
The terminal usage information includes a remaining charge, a usage time of a mobile terminal device including the power receiving device, and a predicted use of the mobile terminal device estimated.
The power reception control unit is configured to share the terminal usage information among a plurality of the power receiving devices by transmitting the terminal usage information to the other power receiving devices. The power receiving device according to claim 16, wherein
The power reception control unit generates, based on the shared terminal usage information, charging policy information that is information charging for controlling charging priority, power transmission amount, and power transmission time for the plurality of power receiving devices, and A power receiving device that transmits charging policy information to the power transmitting device.

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