JP2023079050A - WIRELESS POWER SUPPLY WIRING STRUCTURE, WIRELESS POWER SUPPLY WIRING CIRCUIT BOARD, SUBSTRATE ASSEMBLY SHEET, AND POWER SUPPLY SYSTEM - Google Patents

Abstract

The present invention realizes a function of transmitting and receiving power with efficiency and capacity according to the use of power transmission and reception with a thin configuration.
A wiring structure for wireless power receiving and feeding has wiring layers for a plurality of coils formed on one side in a thickness direction of an insulating layer. The thickness of the wiring layer 211 of a part of the coils 21 is different from the thickness of the wiring layer 221 of the remaining coils 22 .
[Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a wiring structure for wireless power supply, a wiring circuit board for wireless power supply, a board assembly sheet, and a power supply system having the wiring structure.

For example, in Patent Document 1, different power transmission coils out of a plurality of power transmission coils are made to exist on different planes, and the central axis of each of the plurality of power transmission coils is aligned with all other power transmission coils out of the plurality of power transmission coils. The coils are placed at a lateral distance from the central axis of the coil, and the coils on different planes are of different sizes and shapes, allowing the electronic device to be placed anywhere on the charging surface while achieving high efficiency or low efficiency. A wireless charging device configured with efficiency charging capability is disclosed.

JP 2018-186699 A

By the way, in the above-described conventional configuration, different power transmission coils among the plurality of power transmission coils are arranged on different planes, so that multiple stages of power transmission coils exist in the thickness direction. As a result, it is extremely difficult to reduce the thickness of the conventional wireless charging device while maintaining the functions of the conventional wireless charging device because the thickness of the wireless charging device is mainly caused by stacking the thickness of the power transmission coils in multiple stages. There is Such a problem can also occur in wireless power receiving devices.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a wiring structure for wireless power receiving/supplying capable of realizing a function of transmitting/receiving power with efficiency and capacity according to the purpose of power transmission/reception in a thin configuration, and a wireless power receiving/supplying structure having the wiring structure. The purpose of the present invention is to provide a wiring circuit board, a board assembly sheet, and a power supply system for a power supply.

The present invention relates to a wiring structure for wireless power receiving and feeding in which wiring layers for a plurality of coils are formed on one side of an insulating layer in the thickness direction,
The wiring layer thickness of some of the plurality of coils is different from the wiring layer thickness of the remaining coils.

According to the above configuration, by forming a wiring layer of a plurality of coils with different thicknesses on one side in the thickness direction of the insulating layer, the function of transmitting and receiving power with efficiency and capacity according to the purpose of power transmission and reception can be achieved. It can be realized with a thin configuration.

In the wiring structure for wireless power receiving/supplying of the present invention, the wiring layers of the plurality of coils have different thicknesses.

According to the above configuration, it is possible to increase the number of functions of transmitting/receiving power with efficiency and capacity according to the application of power transmission/reception by the number of different thicknesses of the wiring layers of the coils.

In the wiring structure for wireless power receiving/supplying of the present invention, the coil centers of the plurality of coils are aligned, and the wiring layers of the respective coils are separated from each other.

According to the above configuration, a plurality of coils having different thicknesses can be arranged at the same location on the same plane.

In the wiring structure for wireless power receiving/supplying of the present invention, a maximum length thickness A and a minimum length thickness B in the wiring layer of the plurality of coils are set so as to have a relationship of A/B=2 to 200. there is

According to the above configuration, the wiring pattern can be easily formed in the manufacturing process.

In the wiring structure for wireless power receiving/supplying of the present invention, the distance between the wiring layers of the plurality of coils is 2 μm to 400 μm.

According to the above configuration, the wiring pattern can be easily formed in the manufacturing process.

According to another aspect of the present invention, there is provided a wired circuit board for wireless power receiving and power supply, comprising the wiring structure for wireless power receiving and power.

According to the above configuration, by forming a wiring layer of a plurality of coils with different thicknesses on one side in the thickness direction of the insulating layer, the function of transmitting and receiving power with efficiency and capacity according to the purpose of power transmission and reception can be achieved. It can be realized with a thin wired circuit board for wireless power receiving/supplying.

The present invention is a substrate assembly sheet, wherein a plurality of coil substrate units having the wiring structure for wireless power receiving and feeding are arranged in the planar direction of the insulating layer.

According to the above configuration, the function of transmitting and receiving power with efficiency and capacity according to the application of power transmission and reception is realized by a thin coil board unit, and by arranging a plurality of coil board units in the planar direction of the insulating layer, A substrate assembly sheet of any size can be easily formed.

The present invention is a power supply system capable of wirelessly supplying power to a power receiving system including a power receiving coil,
a wired circuit board for wireless power supply;
one or more coils out of the plurality of coils by supplying a fluctuating current to the plurality of coils as power feeding coils in the wired circuit board for wireless power feeding and supplying electric power to the power receiving coil; a power supply control unit that selects and supplies a fluctuating current to the selected coil;
It has

According to the above configuration, by forming a wiring layer of a plurality of coils with different thicknesses on one side in the thickness direction of the insulating layer, the function of transmitting and receiving power with efficiency and capacity according to the purpose of power transmission and reception can be achieved. It can be realized by a power feeding system having a thin wiring circuit board for wireless power receiving and feeding.

It is an explanatory view showing a wiring structure for wireless power receiving. It is an explanatory view showing a wiring structure for wireless power receiving. It is an explanatory view showing a wiring structure for wireless power receiving. It is an explanatory view showing a wiring structure for wireless power receiving. It is an explanatory view showing a wiring structure for wireless power receiving. It is an explanatory view showing a wiring structure for wireless power receiving. It is an explanatory view showing a wiring structure for wireless power receiving. FIG. 4 is an explanatory diagram showing a substrate assembly sheet; It is an explanatory view showing a wired circuit board for wireless power supply. It is an explanatory view showing a control board. 3 is a block diagram of a power supply device and a power receiving device; FIG. FIG. 4 is an explanatory diagram of a coil selection table; 10 is a flow chart of power supply use coil selection processing. 6 is a flowchart of power supply processing; 6 is a flowchart of power receiving system processing; FIG. 10 is an explanatory diagram showing the process of selecting a coil to be used for power supply;

(Wiring structure for wireless power receiving)
A first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, in the wiring structure 1 for wireless power receiving/supplying, wiring layers 211 and 221 for a plurality of coils 21 and 22 are formed on one surface of an insulating layer 11 in the thickness direction. The thickness of the wiring layer 211 of some of the coils 21 among the coils 22 is different from the thickness of the wiring layer 221 of the remaining coils 22 . Specifically, when the coil element 200 including two types of coils 21 and 22 with different thicknesses is the minimum unit of the coil assembly 100, the wiring structure 1 for wireless power receiving/supplying is configured such that one coil 21 in the coil element 200 and the thickness of the other coil 22 are different. In this embodiment, a coil assembly 100 in which a plurality of coil elements 200 are arranged on a plane will be described, but the coil assembly 100 is not limited to this, and a plurality of coils having different sizes and thicknesses can be used to form a coil assembly. A body 100 may be formed.

Here, “one surface in the thickness direction of the insulating layer 11 ” may be either the upper surface (front surface) or the lower surface (rear surface) of the insulating layer 11 . In addition, the relationship between the "part" and the "remainder" is not limited to the relationship between the coils 21 and 22 in the coil element 200; The thickness of one coil may be different from the thickness of any one of the other coils. That is, the "remaining coils" may be all the coils excluding the "part", or may be one or more coils excluding the "part". Further, when there is a coil assembly 100 in which coils are arranged in multiple rows and multiple columns, the thickness of the coils in a partial region of the coil assembly 100 and the thickness of the coils in the remaining region excluding a part are different. They may be different. The coil assembly 100 may be in a state in which coils having different thicknesses are arranged in a plurality of divided regions such as three or four regions.

According to the above configuration, the wiring structure 1 for wireless power receiving/supplying has a small resistance value that is inversely proportional to the cross-sectional area of the wiring layer 211 in the coil 21 having a large thickness. Since the coil 22 has a large resistance value inversely proportional to the cross-sectional area of the wiring layer 221, it is difficult for the current to flow. As a result, when a fluctuating current whose magnitude and direction periodically change with the passage of time is supplied to each of the coils 21 and 22, the power transmission and reception efficiency of the coils 21 and 22 will be different. As a result, the wiring structure 1 for wireless power supply/reception can transmit/receive power with efficiency and capability according to the purpose of power transmission/reception by selecting the coils 21 and 22 through which the fluctuating current flows. In addition, since the wiring structure 1 for wireless power reception and power supply has the wiring layers 211 and 221 of the plurality of coils 21 and 22 with different thicknesses formed on one surface of the insulating layer 11 in the thickness direction, it is suitable for power transmission and reception. It is possible to realize the function of transmitting and receiving power with the corresponding efficiency and capacity with a thinner configuration than when multiple coils are stacked in the thickness direction.

(Wiring structure for wireless power receiving: coil element 200)
The coil element 200 has coils 21 and 22 with circular outer shapes. Each of the coils 21 and 22 is formed by spirally forming wiring layers 211 and 221 made of conductive metal by sputtering, plating, or the like. The conductive metals of the coils 21 and 22 are exemplified by copper, silver, gold, nickel, solder, or alloys thereof. Incidentally, the conductive metal of the coils 21 and 22 is preferably copper. Alternatively, the coils 21 and 22 may be formed by spirally forming wiring layers 211 and 221 of core wires coated with an insulating film. Alternatively, one of the coils 21 and 22 may be formed by sputtering, plating, or the like, and the other coil 22 may be formed of a core wire. In this case, the difference in thickness between the coils 21 and 22 can be greatly increased. Moreover, the coils 21 and 22 are not limited to a spiral shape, and may be formed in a ring shape by a single wiring layer 211 and 221 .

In the coil element 200, the wiring layers 211 and 221 of the coils 21 and 22 may have different thicknesses. As a result, the wiring structure 1 for wireless power receiving/supplying can increase the function of transmitting/receiving power with efficiency and capacity according to the application of power transmission/reception by the number of the wiring layers 211/221 of the coils 21/22 having different thicknesses. can. In FIG. 1, the coil element 200 includes the coil 21 with a large thickness and the coil 22 with a small thickness. , the minimum thickness coil 22 and the intermediate thickness coil 23 may be used as the coil element 200 . In this case, by energizing the individual coils 21, 22, and 23, power can be transmitted and received with three different efficiencies and capacities. Also, the coil element 200 may be configured to switch the combination of energizing the coils 21, 22, and 23. FIG. For example, the coil element 200 switches between energization of individual coils 21, 22, 23, energization of all coils 21, 22, 23, and energization of a combination of two types of coils 21, 22, 23. may be enabled. In this case, it is possible to fine-tune the efficiency and capacity of power transmission and reception.

In the coil element 200 , the thickness of the wiring layer 211 of some of the coils 21 and 22 may be different from the thickness of the wiring layer 221 of the remaining one or more coils 22 . For example, in FIG. 2, four coils 21, 22, 23, 21 of a maximum thickness coil 21, a minimum thickness coil 22, an intermediate thickness coil 23, and a maximum thickness coil 21 are coil elements. 200 may be used. 1, four coils 21, 22, 21, 22 having two combinations of the coil 21 with the maximum thickness and the coil 22 with the minimum thickness may be used as the coil element 200. FIG. That is, the coil element 200 may include coils 21, 22, and 23 having the same thickness. In this case, by combining various coil elements 200, a coil assembly 100 having a complicated wiring configuration and shape can be easily produced.

In the coil element 200 of FIGS. 1 and 2, all the coils 21, 22, 23 are set to have the same shape and the same size, but at least one coil 21, 22, 23 has a different shape or different size. may be set. For example, as shown in FIG. 3, the coil element 200 may be formed of a large size coil 21 and a small size coil 22 . Further, in coil element 200, coils 21 and 22 may be formed in polygonal shapes including triangular and quadrangular shapes. For example, as shown in FIG. 4, the coil element 200 has the wiring layers 211 and 221 of the coils 21 and 22 formed in a straight line, the corner portions bent at an angle of 90 degrees, and the size of the square from the outside to the inside. It may have a square spiral profile by forming it to shrink.

In addition, in the coil element 200 of FIG. 2, all the coils 21, 22, 23 are arranged linearly with a distance, but the arrangement is not limited to this. For example, some of the coils 21 and 22 may be arranged linearly, and the remaining coils 23 may be arranged in parallel with the coils 21 and 22 so as to be arranged in a plane. Alternatively, the coil element 200 may be such that the coil centers of the coils 21 and 22 are arranged within the coils 21 and 22, and the coils 21 and 22 are electrically non-contact with each other. As a specific example, as shown in FIG. 5, the coil centers of the plurality of coils 21 and 22 may be aligned, and the wiring layers 211 and 221 of the coils 21 and 22 may be separated from each other. In this case, a plurality of coils 21 and 22 having different thicknesses can be arranged at the same location on the same plane. Further, as shown in FIG. 6, the coil centers of the coils 21 and 22 having a quadrangular spiral outer shape are arranged inside the respective coils 21 and 22 so that the coils 21 and 22 are not in electrical contact with each other. As shown, the wiring layers 211 and 221 of the coils 21 and 22 may be separated from each other.

In addition, although the coil element 200 of FIG. 1 has one surface of the insulating layer 11 formed flat, it is not limited to this. For example, as shown in FIG. 7, the coil element 200 (coil assembly 100) has one surface of the insulating layer 11 formed in an uneven shape so that one surfaces of all the coils 21 and 22 are positioned on the same plane. may be Specifically, coil element 200 (coil assembly 100) is formed by forming coil 21 having a large thickness in the concave portion of insulating layer 11 and forming small coil 22 in the convex portion of insulating layer 11. - The upper surface, which is one side of 22, may be flush. In this case, there is no difference between the coils 21 and 22 of the coil element 200 (coil assembly 100) and the coils 21 and 22 of the coil element 200 (coil assembly 100). When calculating the power transmission/reception efficiency and ability of each coil 21 and 22, the influence of the distance difference can be excluded. The insulating layer 11 is made of an insulating material such as synthetic resin such as polyimide resin, polyamideimide resin, acrylic resin, polyethernitrile resin, polyethersulfone resin, polyethylene terephthalate resin, polyethylene naphthalate resin, and polyvinyl chloride resin. It is

As shown in FIG. 1, the maximum length thickness A and the minimum length thickness B in the wiring layers 211 and 221 of the plurality of coils 21 and 22 are set so as to have a relationship of A/B=2 to 200. preferably. Further, as shown in FIGS. 4 and 6, it is preferable that the distances C1, C2, C3 between the wiring layers 211, 221 of the plurality of coils 21, 22 are 2 μm to 400 μm. The reason for this is that when a photosensitive resist is used in the manufacturing process, it is easier to form a resist pattern if the wiring width and the resist width are close to each other. In addition, when wiring is formed by plating, the distance between wirings (resist width), which is the distance between wirings C1, C2, and C3, and the height of a wiring such as Cu to be formed, which is the wiring height (thickness A B) ( This is because the closer the resist height is, the easier it is to form wiring.

(Wiring structure for wireless power supply: coil assembly 100, coil substrate unit 400)
The coil assembly 100 is formed by arranging the coil elements 200 illustrated in FIGS. 1 to 7 in a planar direction. The coil assembly 100 can be applied to both a power feeding system (power feeding device) and a power receiving system (power receiving device). For example, FIG. 1 shows a state in which the coil assembly 100 is applied to the coil substrate unit 400. As shown in FIG. Thus, the coil substrate unit 400 has the wiring structure 1 for wireless power receiving/supplying by including the coil assembly 100 .

The coil substrate unit 400 has a coil assembly 100 on which the power receiving device 500 can be mounted. It is configured to select the coils 21 and 22 in the coil assembly 100 and apply the electric current to the selected coils 21 and 22 .

In addition, the coil board unit 400 has connection terminals and magnets on the side surfaces (end surfaces in the plane direction), so that the terminals are electrically connected and coupled by physically contacting each other while attracting each other due to the attractive force of the magnets. made possible. Accordingly, as shown in FIG. 8, for example, a plurality of coil substrate units 400 can be arranged in the planar direction of the insulating layer 11 to form a substrate aggregate sheet 600. As shown in FIG. In other words, the substrate assembly sheet 600 is formed by arranging a plurality of coil substrate units 400 in the planar direction of the insulating layer 11 . As a result, the substrate assembly sheet 600 can be easily changed to any size and shape by connecting and disconnecting the coil substrate units 400, and has the function of transmitting and receiving power with efficiency and capacity according to the purpose of power transmission and reception. can be realized by the thinned coil substrate unit 400 .

The coil substrate unit 400 can be applied to power the power receiving device 500 such as a smart phone while being placed on a desk or the like. In addition, the coil substrate unit 400 is applied to wallpaper capable of supplying power to a wall-mounted power receiving device 500 such as a wall clock 5001, and floor building materials capable of supplying power to a floor-mounted power receiving device 500 such as an indirect illuminator 5002. good too. Furthermore, the coil substrate unit 400 may be used as a power supply mechanism for a smart phone, a car navigation device, or the like by being attached to a vehicle interior structure such as a windshield or a center console of an automobile. The power supply mechanism of the vehicle interior structure may be formed by embedding a coil in a material so as to form the wiring structure 1 for wireless power reception and power supply at the manufacturing stage of the vehicle interior structure.

Also, the coil assembly 100 can be applied to the power receiving mechanism of the power receiving device 500 . Note that the coil assembly 100 may be formed as part of the housing of the power receiving device 500 or a control board. A mobile device is exemplified as the power receiving device 500 . Portable devices include both “handheld” and “wearable” devices. Specifically, mobile devices include portable computers (laptops, notebook computers, tablet PCs, etc.), cameras, audio equipment/AV devices (portable music players, IC recorders, portable DVD players, etc.), calculators (pocket computers, calculators), game machines, computer peripherals (mobile printers, mobile scanners, mobile modems, etc.), dedicated information devices (electronic dictionaries, electronic notebooks, electronic books, portable data terminals, etc.), mobile communication terminals, voice communication terminals (mobile phones , PHS, satellite phone, third-party radio, amateur radio, specified low-power radio, personal radio, citizen radio, etc.), data communication terminals (mobile phones, PHS (feature phones, smartphones), pagers, etc.), broadcasting receivers (television/radio), portable radio, portable television, 1seg, other equipment (wristwatch, pocket watch), hearing aid, handheld GPS, security buzzer, flashlight/penlight, battery pack, and the like. Moreover, the "hearing aid" can be exemplified by an ear-hook type hearing aid, an earhole type hearing aid, and a spectacle type hearing aid. Also, the mobile device may have an IoT (Internet of Things) function.

As shown in FIG. 9, the coil assembly 100 can be applied to a wired circuit board 300 for wireless power supply. The wired circuit board 300 for wireless power supply/reception has a configuration in which coil elements 200 are coil elements 21 and 22 formed in a rectangular spiral shape, and the coil elements 200 are arranged in two rows and two columns. Power supply layers 212 and 222 that are connected to the terminals of the coils 21 and 22 and that supply the coils 21 and 22 with fluctuating currents are preferably formed on the other side of the insulating layer 11 . In this case, the wiring paths can be simplified by separating the coils 21 and 22 and the power supply layers 212 and 222 on one side and the other side of the insulating layer 11 .

Also, as shown in FIG. 10 , the coil assembly 100 may be part of a control board 301 that controls a power receiving device 500 such as a hearing aid 700 having a secondary battery 504 . In this case, since the control board 301 includes the power receiving mechanism of the wiring structure 1 for wireless power receiving/power supply, the control board 301 can be formed as a thin flexible printed wiring board. The coil assembly 100 of the control board 301 and the wired circuit board 300 for wireless power supply/reception may be formed of any coil element 200 (wiring structure 1 for wireless power supply/reception) shown in FIGS.

(Power supply device 800)
Next, a case will be described in which the wired circuit board 300 for wireless power supply and reception provided with the coil assembly 100 of the wiring structure 1 for wireless power supply and reception is applied to a power supply device 800 (power supply system).

As shown in FIG. 11 , the power supply device 800 is a power supply system capable of wirelessly supplying power to a power receiving device 500 (power receiving device system) having a power receiving coil 501 . The power supply device 800 supplies a fluctuating current to the wired circuit board for wireless power supply 300 and the plurality of power supply coils 310 on the wired circuit board for wireless power supply 300, and supplies electric power to the power receiving coil 501. and a power supply control unit 810 that selects one or more power supply coils 310 from among the plurality of power supply coils 310 and supplies a fluctuating current to the selected power supply coils 310 .

The power supply control unit 810 is provided between the power supply control circuit 801 , the variable current output unit 802 that outputs a variable current, and the variable current output unit 802 and the wired circuit board for wireless power supply 300 . It has a coil switching unit 803 for switching between energization and stoppage of energization of the fluctuating current. The power supply control circuit 801 can control the coil switching section 803 . Then, the power supply control circuit 801 supplies a fluctuating current to the plurality of power supply coils 310 using the coil switching unit 803 and supplies electric power to the power reception coil 501 , thereby selecting one or more power supply coils 310 from among the plurality of power supply coils 310 . It is possible to execute a power supply use coil selection process of selecting the power supply coil 310 and a power supply process of supplying a fluctuating current to the selected power supply coil 310 .

Specifically, the power supply control circuit 801 includes a calculation unit 8011 that executes a control program including a coil selection process for power supply use and a power supply process, and a coil selection table used for executing the coil selection process for power supply use and the power supply process. It has a storage unit 8012 that stores data, a control program, and the like, and a communication unit 8013 that enables wireless communication with the power receiving apparatus 500 .

(Power supply device 800: coil selection table)
As shown in FIG. 12, the coil selection table has the coil number, coil position, power receiving voltage, power receiving system ID, and power feeding mode as table items. The “coil number” is a unique number assigned to each feeding coil 310. For example, if the coil assembly 100 is formed of 400 feeding coils 310, the coil numbers 0000 to 0399 are assigned to the feeding coils 310. are assigned respectively. "Coil position" indicates the position (Xi, Yi) in the coil assembly 100 where the feeding coil 310 is arranged when the coil assembly 100 is indicated by the horizontal axis (X axis) and the vertical axis (Y axis). It is a thing. For example, when the coil position is (00, 00), the feed coil 310 arranged at the lower end of the left end in the figure in the coil assembly 100 is identified. Further, when the coil position is (19, 19), the feeding coil 310 arranged at the upper end of the right end of the coil assembly 100 in the drawing is specified.

“Received voltage” is the voltage included in the received power voltage information transmitted from the power receiving device 500 in the process of selecting a coil to be used for power supply. 0 V is indicated by a blank. The “power receiving system ID” is identification information specific to the power receiving device 500 and enables the power receiving device 800 to identify the power receiving device 500 when there are a plurality of power receiving devices 500 . For example, when the power receiving system ID is ID001, the power receiving device 500 of the smart phone is specified, when the power receiving system ID is ID002, the power receiving device 500 of the hearing aid is specified, and when the power receiving system ID is ID003, the power receiving device of the wristwatch is specified. A device 500 is identified.

The “power supply mode” indicates the degree of power supplied to the power receiving device 500, and includes a high speed mode M1 for charging with large power, a low speed mode M2 for charging with small power, a stop mode for stopping power supply, and the like. Note that the stop mode is indicated by a blank. The power feeding mode is set based on the operating state and charging state of power receiving device 500 . For example, when the operation state of the power receiving device 500 is the sleep state in which only the minimum operations are performed, the low speed mode M2 is set. Further, when the charging state of the power receiving device 500 is the discharging state, the high speed mode M1 is set, and when the power receiving device 500 is almost fully charged, the low speed mode M2 is set.

As a result, by referring to the table data of each table item in the coil selection table, it is possible to determine whether or not to energize each feeding coil 310 with a varying current, and to determine how much the varying current should be applied. can do. For example, power supply coil 310 with coil number 0000 is placed at coil position (00, 00), and the voltage in the power supply use coil selection process is less than the detection threshold of 0.03 V. It can be seen that the receiving coils 501 are not arranged to face each other. Note that the detection threshold is a value set in advance for determining whether or not the power receiving device 500 exists. As a result, it is determined that power supply coil 310 with coil number 0000 is not to be used for power supply to power receiving device 500, and supply of the fluctuating current is stopped.

On the other hand, for example, the power supply coil 310 with the coil number 0002 is arranged at the coil position (00, 02), and the voltage in the power supply use coil selection process is equal to or higher than the detection threshold value of 2.3 V. It can be seen that the power receiving coils 501 of the power receiving device 500 having the identification number are arranged to face each other. It can also be seen that the power receiving device 500 is in an operating state or charging state that requires power supply corresponding to the high speed mode M1. As a result, power supply coil 310 with coil number 0002 is determined to be used for power supply to power receiving apparatus 500 with ID001, and a fluctuating current is supplied with power corresponding to high speed mode M1.

(Power receiving device 500)
As shown in FIG. 11, the power receiving device 500 includes a power receiving coil 501 that receives an electromagnetic wave from a power feeding coil 310 of the power feeding device 800 and converts it into a fluctuating current, and a rectifying unit that converts the fluctuating current of the power receiving coil 501 into a direct current. 502, a charging unit 503 that charges the secondary battery 504 using a direct current, a voltage conversion unit 505 that transforms the discharge current of the secondary battery 504 to a predetermined drive voltage, and drive components that operate with the power of the drive voltage. 506. The power receiving device 500 also includes a control unit 507 , a voltage detection unit 508 , and a communication unit 509 . The communication unit 509 enables wireless communication with the communication unit 8013 of the power supply device 800 . The voltage detection unit 508 detects the voltage rectified by the rectification unit 502 and can transmit it to the power supply device 800 via the communication unit 509 as received voltage information. The control unit 507 can execute the power receiving system selection process of FIG. Information on the power supply mode can be transmitted from the communication unit 509 to the power supply apparatus 800 based on the state.

Note that the secondary battery 504 is not particularly limited as long as it is rechargeable, and various secondary batteries 504 including all-solid-state batteries can be used according to the type of the power receiving device 500 . For example, when the power receiving device 500 is a portable device, the secondary battery 504 is preferably a lithium ion battery. In this case, the nominal voltage of the lithium-ion battery is in the range of 3.6 V to 3.7 V, which exceeds the nominal voltage of the air battery or nickel-metal hydride battery 504, 1.2 V to 1.4 V. . In addition, the battery voltage of the lithium ion battery exhibits a discharge characteristic in which the battery voltage drops from about 4.2 V to about 2.7 V as it discharges. , the portable device 2 can be driven for a longer period of time than when the air battery or the nickel-hydrogen secondary battery 504 is used.

(Operation of power supply device 800)
FIG. 13 is a flow chart of power supply use coil selection processing for selecting the power supply coil 310 to be supplied with the fluctuating current in the power supply device 800 .

Specifically, first, the calculation unit 8011 regards the power supply coil 310 to which the fluctuating current is applied as the "power supply coil", and removes the "power supply use coil" from the power supply coil 310, and converts the power supply coil 310 into the "power supply coil". extracted as "supply target coil". That is, by removing the “feeding coil” that is the feeding coil 310 that is wirelessly feeding the power receiving device 500 from the feeding coils 310, the feeding coil 310 that is not feeding wirelessly is designated as the “supply target coil”. be done. As a result, power receiving devices 500 that are being supplied with power are excluded from search targets, so that power receiving devices 500 that are newly placed on coil assembly 100 can be detected using power feeding coils 310 whose number is reduced. It has become. (S11).

Next, the feeding coil 310 is selected from among the coils to be supplied (S12), and a fluctuating current is supplied (energized) to the selected feeding coil 310 (S13). Power receiving voltage reception processing is executed to receive power receiving voltage information and power receiving system ID information from the power receiving device 500 . If the received power voltage information is not received within the predetermined time, it is determined that the received power voltage information of 0V has been received (S14). Then, the power receiving voltage and the power receiving system ID are stored as table data (Xi, Yi, V, ID) in association with the selected coil number n and coil position (Xi, Yi) of the power feeding coil 310 (S15).

Next, it is determined whether or not all the supply target coils have been selected (S16). If all of the supply target coils have not been selected (S16: NO), the process is re-executed from S12, and the received voltage and the like in the power supply coil 310 selected from the next supply target coils are detected and stored. On the other hand, if all the coils to be supplied are selected (S16: YES), the power supply coil 310 corresponding to the received voltage equal to or higher than the predetermined detection threshold is selected as the power supply coil (S17), and the selected power supply coil is selected. The power feeding process used is executed (S17).

As shown in FIG. 14, when the power feeding process is executed, it is determined whether or not there is a coil used for power feeding (S21). If there is no coil to be used for power supply (S21: NO), this process is terminated and re-executed from S11. On the other hand, if there is a coil to be used for power supply ( S<b>21 : YES), power supply start processing is executed to start power supply to the power receiving device 500 and power supply start information is transmitted to the power receiving device 500 . In addition, in the table item of the power supply mode associated with each power supply use coil (power supply coil 310), if table data of some power supply mode is stored, the power fluctuation current corresponding to the stored power supply mode is supplied to the power supply coil. On the other hand, if the power supply mode table data is not stored, the minimum initial power fluctuation current is supplied. Then, the power supply mode information, the power receiving system ID information, and the power supply stop information are received from the power receiving device 500 (S22).

If no information is received from the power receiving device 500 within the predetermined time (S23: NO), this process is terminated and re-executed from S11. On the other hand, if the information from the power receiving device 500 is received within the predetermined time (S23: YES), it is determined whether or not the received information is power supply stop information (S24). If it is power supply stop information (S24: YES), the power supply use coil corresponding to the power receiving system ID is released, and wireless power supply to the power receiving device 500 that transmitted the power supply stop information is stopped (S25). Then, this process is terminated and re-executed from S11.

On the other hand, if it is not power supply stop information (S24: NO), it is determined whether or not power supply mode information has been received (S26). If the power supply mode information is not received (S26: NO), this process is terminated and re-executed from S11. On the other hand, if the power supply mode information is received (S26: YES), the power supply use coil that transmitted the power supply mode information is selected. That is, the information in the table item of the power supply mode associated with the power supply use coil of the power receiving system ID that transmitted the power supply mode information is updated to the received power supply mode (S27). Then, the selected coil to be used for power feeding (power feeding coil 310) is supplied (energized) with the updated fluctuating current in the power feeding mode (S28). After that, this process is terminated and re-executed from S11.

(Operation of power receiving device 500)
FIG. 15 is a flowchart of a power receiving system selection process for causing the power receiving device 500 to select the power feeding coil 310 to be used for power feeding to the power feeding device 800 .

Specifically, first, the calculation unit of the control unit 507 determines whether or not the secondary battery 504 is being charged (S31). If the secondary battery 504 is not being charged (S31: NO), S35 is executed. On the other hand, if the secondary battery 504 is being charged (S31: YES), the transmission of the power receiving voltage information used for selecting the power feeding coil 310 is stopped (S32). It is determined whether power is being supplied (S33). If power is not being supplied (S33: NO), S35 is executed. On the other hand, if power is being supplied (S33: YES), the power receiving voltage information and the power receiving system ID information are transmitted (S34), and then S35 is executed.

In S35, it is determined whether or not power supply start information has been received (S35), and if power supply start information has not been received (S35: NO), S37 is executed. On the other hand, if power supply start information has been received (S35: YES), power receiving system ID information and power supply mode information are transmitted based on the current state of charge of the secondary battery 504 (S36), and S37 is executed. In S37, it is determined whether or not to change the power feeding mode, for example, when the secondary battery 504 is almost fully charged and the power for charging the secondary battery 504 is to be reduced (S37). If the power supply mode is not to be changed (S37: NO), S39 is executed. On the other hand, if the power supply mode is to be changed (S37: YES), the power receiving system ID information and the power supply mode information are transmitted (S38), and S39 is executed.

In S39, it is determined whether or not to stop power supply, for example, when the secondary battery 504 is fully charged and it is desired to stop charging the secondary battery 504 (S39). If the power supply is not to be stopped (S39: NO), the process is re-executed from S31. On the other hand, if the power supply is to be stopped (S39: YES), the power receiving system ID information and the power supply stop information are transmitted (S40), and the process is re-executed from S31.

(Modified Example of Operation of Power Supply Device 800)
In the feed coil selection process of FIG. 13 , when the feed coil 310 is selected as the feed coil from among the coils to be fed, all the feed coils 310 are set as the coil to be fed, but the present invention is not limited to this. Instead, for example, the coil element 200 may be the coil to be supplied. In this case, since the coil element 200 includes a plurality of coils 21 and 22, it is possible to reduce the amount of processing when selecting the coils to be used for power supply and to select the coils to be used for power supply in a short time.

13, the coil assembly 100 is divided into a plurality of regions, and based on the total received voltage of the plurality of power feeding coils 310 present in each region, the power receiving device 500 is placed in which region. After determining if it exists, it may be executed. Even in this case, it is possible to reduce the amount of processing when selecting the coils to be used for power supply, and to select the coils to be used for power supply in a short time.

As a specific example, as shown in FIG. 16, the entire coil assembly 100 is divided into a first area A1, a second area A2, a third area A3, and a fourth area A4. Then, the fluctuating current is applied to all the power supply coils 310 existing in the first area A1, and the voltage of the fluctuating current that changes depending on the presence or absence of the power receiving device 500 is detected. After performing such area detection processing on the first area A1, the second area A2, the third area A3, and the fourth area A4, the second area A2 in which the voltage has decreased significantly is extracted. Note that the region extraction may be performed based on the received power voltage information and the power receiving system ID information transmitted from the power receiving device 500 .

Next, the second area A2 is divided into a first area A21, a second area A22, a third area A23, and a fourth area A24. Then, the fluctuating current is applied to all the power supply coils 310 existing in the first area A21, and the voltage of the fluctuating current that changes depending on the presence or absence of the power receiving device 500 is detected. After performing such area detection processing on the first area A21, the second area A22, the third area A23, and the fourth area A24, the first area A22 in which the voltage has greatly decreased is extracted. After that, in the extracted first area A22, the feed use coil selection process of FIG. 13 is executed.

In FIG. 16, the coil assembly 100 is divided into four sections, and the area detection process is repeated twice. . 16 illustrates a case where one power receiving device 500 is placed on the coil assembly 100, a plurality of power receiving devices 500 may be placed on one region, or a plurality of power receiving devices 500 may be placed on one region. may be respectively placed in the areas of

In the above detailed description, the characteristic parts have been mainly described so that the present invention can be understood more easily. It can also apply to morphology, and its scope should be interpreted as broadly as possible. Moreover, the terms and usage used in this specification are used to describe the present invention precisely, and are not used to limit the interpretation of the present invention. In addition, it is believed that those skilled in the art can easily conceive of other configurations, systems, methods, etc. included in the concept of the present invention from the concept of the invention described herein. Therefore, the claims should be considered to include equivalent configurations within the scope of the technical idea of the present invention. In addition, in order to fully understand the object and effects of the present invention, it is desirable to fully consider the documents already disclosed.

1 Wiring structure for wireless power supply 100 Coil assembly 11 Insulating layer 200 Coil element 201 Coil element 21 Coils 211 and 221 Wiring layers 212 and 222 Power supply layer 22 Coil 23 Coil 300 Wired circuit board for wireless power supply 301 Control board 310 Power supply coil 400 coil substrate unit 500 power receiving device 501 power receiving coil 600 substrate assembly sheet 800 power feeding device

Claims (8)

A wiring structure for wireless power supply and reception in which a wiring layer of a plurality of coils is formed on one side in the thickness direction of an insulating layer,
A wiring structure for wireless power receiving and supplying, wherein a thickness of a wiring layer of some of the plurality of coils is different from a thickness of a wiring layer of the remaining coils. 2. The wiring structure for wireless power reception and power supply according to claim 1, wherein the wiring layers of the plurality of coils have different thicknesses. 3. The wiring structure for wireless power receiving and supplying according to claim 1, wherein the coil centers of the plurality of coils are aligned, and the wiring layers of the respective coils are separated from each other. 3. A maximum length thickness A and a minimum length thickness B of the wiring layer of the plurality of coils are set so as to have a relationship of A/B=2 to 200. The wiring structure for wireless power receiving and supplying according to any one of 1. 5. The wiring structure for wireless power reception and power supply according to claim 1, wherein the distance between the wiring layers of the plurality of coils is 2 μm to 400 μm. A wired circuit board for wireless power receiving and supplying, comprising the wiring structure for wireless power receiving and supplying according to any one of claims 1 to 5. 6. A substrate assembly sheet, wherein a plurality of coil substrate units having the wiring structure for wireless power reception and power supply according to any one of claims 1 to 5 are arranged in a planar direction of the insulating layer. A power supply system capable of wirelessly supplying power to a power receiving system including a power receiving coil,
A wired circuit board for wireless power supply according to claim 6;
one or more coils out of the plurality of coils by supplying a fluctuating current to the plurality of coils as power feeding coils in the wired circuit board for wireless power feeding and supplying electric power to the power receiving coil; a power supply control unit that selects and supplies a fluctuating current to the selected coil;
A power supply system comprising:

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