CN111835044A - Charging equipment, load equipment and charging system - Google Patents

Abstract

The invention relates to the technical field of electronic device charging, and discloses a charging device, a load device and a charging system. The charging device can adjust the power of the power source to a state that the load device can directly use for charging and output it to the load device, so that the load device can directly use the power to charge the battery of the load device without adjustment after receiving the power from the charging device. In the above manner, the present invention can reduce the power loss caused by the load device adjusting the power from the charging device, and reduce the power loss during the power transmission process, thereby improving the charging efficiency.

Description

Charging equipment, load equipment and charging system

technical field

The present invention relates to the technical field of electronic device charging, in particular to a charging device, a load device and a charging system.

Background technique

With the popularization of TWS (True Wireless Stereo, true wireless stereo) earphones, users' requirements for the battery life of TWS earphones are increasing day by day. In the current charging scheme of TWS earphones, the charging box needs to boost the electric energy to a certain amplitude, and then transmit it to the TWS earphones, receive the electric energy through the built-in charging chip of the TWS earphones and make corresponding adjustments, and then charge the battery of the TWS earphones .

Among them, the transmission of high-amplitude power between the charging box and the TWS headset and the corresponding adjustment of the power by the built-in charging chip of the TWS headset will cause a large power loss, resulting in a low charging efficiency of the current TWS headset charging scheme. .

SUMMARY OF THE INVENTION

In view of this, the main technical problem to be solved by the present invention is to provide a charging device, a load device and a charging system, which can improve the charging efficiency.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a charging device, which includes a charging circuit and a first control circuit. The first input end of the charging circuit is connected to the power supply, and the output end of the charging circuit is connected to a load device independent of the charging device, so as to adjust the power of the power source to a state where the load device can be directly used for charging and output to the load device. The first output end of the first control circuit is connected to the second input end of the charging circuit, which is used to control whether the charging circuit outputs electric energy to the load device or not, and the interactive end of the first control circuit is used to send a communication signal to the load device, so that the load The device uses the communication signal to work, including receiving electrical energy for charging.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a load device, the load device includes a battery, a second switch element and a second control circuit. The input end of the second switch element is used for connecting a charging device independent of the load device, and the output end of the second switch element is connected to the battery. The interactive end of the second control circuit is used to connect to the charging device, and the output end of the second control circuit is connected to the control end of the second switching element, so as to interact with the charging device in communication signals, and use the communication signals to work, including outputting switching signals to the first switching element. The two switching elements are turned on, so that the electric energy from the charging device can directly charge the battery without adjustment.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a charging system, which includes a charging device and a load device.

The charging device includes a charging circuit and a first control circuit. The first input end of the charging circuit is connected to the power supply, and the output end of the charging circuit is connected to a load device independent of the charging device, so as to adjust the power of the power source to a state where the load device can be directly used for charging and output to the load device. The first output end of the first control circuit is connected to the second input end of the charging circuit, which is used to control whether the charging circuit outputs electric energy to the load device or not, and the interactive end of the first control circuit is used to send a communication signal to the load device, so that the load The device uses the communication signal to work, including receiving electrical energy for charging.

The load device includes a battery, a second switching element, and a second control circuit. The input end of the second switch element is used to connect to the output end of the charging circuit of the charging device, and the output end of the second switch element is connected to the battery. The interactive end of the second control circuit is used to connect to the interactive end of the first control circuit of the charging device, and the output end of the second control circuit is connected to the control end of the second switching element, so as to interact with the charging device in communication signals, and use the communication signals The operation includes outputting a switching signal to the second switching element to make it turn on, so that the electric energy from the charging device can directly charge the battery without adjustment.

The beneficial effects of the present invention are: different from the prior art, the present invention provides a charging device and a load device, wherein the load device is independent of the charging device, that is, the charging device and the load device are independent individuals. The charging device can adjust the power of the power source to a state where the load device can be directly used for charging and output it to the load device, so that the load device can directly charge the battery of the load device without adjustment after receiving the power from the charging device. That is to say, the charging device adjusts the power to a state where the load device can be directly used for charging, so that the load device can be directly used to charge the battery without any further adjustment, thereby reducing the load caused by the load device adjusting the power from the charging device. power loss. In addition, since the charging device adjusts the electric energy to a state where the load device can be directly used for charging, it can avoid the transmission of high-amplitude electric energy between the charging device and the load device, and reduce the electric energy loss during the transmission process. Thus, the charging efficiency is improved.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort. in:

FIG. 1 is a schematic structural diagram of an embodiment of a charging device of the present invention;

2 is a schematic structural diagram of another embodiment of the charging device of the present invention;

3 is a schematic structural diagram of an embodiment of a load device of the present invention;

4 is a schematic structural diagram of another embodiment of the load device of the present invention;

5 is a schematic structural diagram of an embodiment of the charging system of the present invention;

FIG. 6 is a schematic structural diagram of another embodiment of the charging system of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second" and the like in the present invention are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

Please refer to FIG. 1 , which is a schematic structural diagram of an embodiment of a charging device of the present invention.

In order to solve the technical problem of low charging efficiency between a charging device and a load device in the prior art, an embodiment of the present invention provides a charging device 1, the charging device 1 includes: a charging circuit 11 and a first control circuit 12. The first input terminal 111 of the charging circuit 11 is connected to the power source 13, and the output terminal 112 of the charging circuit 11 is used to connect to a load device independent of the charging device 1, so as to adjust the power of the power source 13 to a state where the load device can be directly used for charging and output to the load device. The first output terminal 121 of the first control circuit 12 is connected to the second input terminal 113 of the charging circuit 11 for controlling whether the charging circuit 11 outputs electric energy to the load device or not, and the interactive terminal 122 of the first control circuit 12 is used to supply the load device Sending a communication signal, so that the load device works by using the communication signal, including receiving electric energy for charging. Details are described below.

In the traditional design, the charging device boosts the electric energy to a certain amplitude, and then transmits it to the load device, receives the electric energy through the built-in charging chip of the load device and makes corresponding adjustments, and then charges the battery of the load device. Among them, in order to ensure that the electric energy provided by the charging device to the load device can meet the use of the load device, the voltage value of the electric energy needs to be boosted to a higher amplitude, such as 5V, which is usually higher than the amplitude required for charging the load device, so that Avoid that the voltage value of the electrical energy does not reach the amplitude required to charge the load device. Correspondingly, the adjustment of the electrical energy by the load device is usually in the form of step-down. This leads to the transmission of high-amplitude electrical energy between the charging device and the load device, and the corresponding adjustment of the electrical energy by the built-in charging chip of the load device, which will result in a large power loss, resulting in a large power loss between the traditional charging device and the load device. charging efficiency is low.

In view of this, an embodiment of the present invention provides a charging device 1 capable of improving charging efficiency, which will be described in detail below.

Please refer to FIGS. 1-2. FIG. 2 is a schematic structural diagram of another embodiment of the charging device of the present invention.

In one embodiment, the charging device 1 includes a charging circuit 11 . The first input terminal 111 of the charging circuit 11 is connected to the power source 13 , and the output terminal 112 of the charging circuit 11 is used to connect to a load device independent of the charging device 1 . The charging circuit 11 can adjust the electric energy of the power source 13 to a state where the load device can be directly used for charging and output it to the load device. That is, the charging circuit 11 can adjust the electric energy provided by the power source 13 and then output it to the load device, including adjusting the voltage value of the electric energy and the like. In this way, the charging circuit 11 can adjust the power according to the demand, so that the load device can directly use it to charge the battery without any further adjustment, thereby reducing the power loss caused by the load device adjusting the power from the charging device 1 . Moreover, since the charging device 1 can adjust the electric energy to the required state (that is, the voltage value of the electric energy can be adjusted to be directly used for the battery charging of the load device without adjustment), instead of boosting the voltage to a value higher than that required for charging the load device Amplitude (which requires the load device to step down to the voltage value required for battery charging), can avoid the transmission of higher amplitude power between the charging device 1 and the load device, reducing the power loss during the transmission process, Thus, the charging efficiency is improved.

It should be noted that the charging circuit 11 of the charging device 1 adjusts the electric energy to a corresponding state according to the set charging scheme, so that the load device can be directly used for charging the load device without adjustment. The charging scheme of the charging device 1 may be fast charging schemes such as constant voltage charging and constant current to constant voltage charging in the current charging technology field, which are within the understanding of those skilled in the art, and will not be repeated here.

Optionally, the charging circuit 11 may be a DC-DC charging circuit, specifically a DC-DC Charging chip, etc., which can adjust the electric energy according to a set charging scheme.

The charging device 1 and the load device are independent entities, respectively, and the load device can be separated from the charging device 1 and exist independently to perform corresponding work. For example, the load device may be a TWS headset, etc., and the charging device 1 may be a charging box corresponding to the TWS headset, or the like. The user takes out the TWS earphones, so that the TWS earphones are separated from the charging box to realize their earphone function, and when the TWS earphones need to be charged, the TWS earphones are put back into the charging box for charging. Of course, the application environment of the charging device 1 and the load device is not limited to the charging box and the TWS earphone, which is not limited here.

The charging device 1 also includes a first control circuit 12 . The first output terminal 121 of the first control circuit 12 is connected to the second input terminal 113 of the charging circuit 11 for controlling whether the charging circuit 11 outputs power to the load device or not. Specifically, the first control circuit 12 inputs a corresponding signal to the second input terminal 113 of the charging circuit 11 through its first output terminal 121, indicating whether the charging circuit 11 outputs power to the load device. The interaction terminal 122 of the first control circuit 12 is used to interact with the load device with a communication signal, so that the load device works by using the communication signal, including the work content of receiving the above-mentioned electric energy for charging.

It should be noted that the linkage work between the charging device 1 and the load device needs to be realized by means of the interaction of communication signals. This includes the linkage work of the charging device 1 charging the load device, specifically including the interaction of the communication signal between the interactive end 122 of the first control circuit 12 of the charging device 1 and the load device, sending a communication signal indicating that the load device is to be charged, and sending a communication signal indicating that the load device is to be charged. After receiving the communication signal indicating confirmation fed back by the load device (ie, communication signal interaction), the first control circuit 12 of the charging device 1 controls the charging circuit 11 to output electric energy to the load device, and the load device uses the exchanged communication signal to know the charging The device 1 is about to output power to it, and is ready to receive the power (that is, the load device works by using the communication signal), so that the charging device 1 can charge the load device. Of course, the linkage work between the charging device 1 and the load device can also include the exchange of the remaining power information of both parties, the pairing work between the charging device 1 and the load device before charging (for example, the pairing of the TWS headset and the charging box), etc. It is realized by means of communication signal interaction, which is not limited here.

Proceed to Figure 1-2. In one embodiment, the charging device 1 further includes a first common terminal 14, and the first common terminal 14 is used to connect the load device. Specifically, the first common terminal 14 is electrically connected to the corresponding terminal on the load device (specifically, it may be in physical contact to achieve electrical connection), and is used for power transmission and communication signal interaction between the charging device 1 and the load device. . The output terminal 112 of the charging circuit 11 and the interaction terminal 122 of the first control circuit 12 are commonly connected to the first common terminal 14 .

That is to say, the power and communication signals of the charging device 1 are transmitted to the load device through the same terminal (ie, the first common terminal 14 ). In the traditional design, the power and communication signals of the charging device need to be transmitted to the load device through different terminals, which results in a more complex circuit structure of the traditional charging device and a large number of terminals, which is not conducive to the simplification of the structure of the charging device and the reduction in size. change. In this embodiment, the electric energy and the communication signal of the charging device 1 are transmitted to the load device through the same terminal, which can reduce the number of terminals of the charging device 1 and simplify the circuit structure of the charging device 1, which is beneficial to the simplification of the structure and the size of the charging device 1. downsize. Especially for TWS earphones and their corresponding charging boxes, a charging box with a smaller volume (ie, the charging device 1 ) can undoubtedly meet the user's requirements for the volume of the charging box to the greatest extent, so as to facilitate the user to carry it with him.

For the case that one charging device 1 corresponds to multiple load devices, for example, one charging box charges at least two TWS earphones, etc., the charging device 1 can design the first common terminal 14 corresponding to each load device, so as to conduct signal interaction with each load device. .

Further, the charging device 1 further includes a first switching element 15 . The control terminal 151 of the first switch element 15 is connected to the second output terminal 123 of the first control circuit 12 , the first terminal 152 of the first switch element 15 is connected to the interactive terminal 122 of the first control circuit 12 , and the second output terminal 122 of the first switch element 15 is connected. The two terminals 153 are connected to the output terminal 112 of the charging circuit 11 . The second output terminal 123 of the first control circuit 12 is used to input a corresponding switching signal to the control terminal 151 of the first switching element 15 to control the connection between the first terminal 152 and the second terminal 153 of the first switching element 15 The electrical connection between the first control circuit 12 and the first common terminal 14 is controlled. Wherein, the interaction terminal 122 of the first control circuit 12 is used to perform communication signal interaction with the load device.

Optionally, the first switching element 15 may be a MOS transistor (metal-oxide-semiconductor field effect transistor) or the like.

In this embodiment, since the power and communication signals of the charging device 1 share the first common terminal 14 for transmission, and the first common terminal 14 cannot transmit power and communication signals at the same time, it is necessary to time-division the transmission of power and communication signals control. Specifically, the electrical connection between the interactive terminal 122 of the first control circuit 12 and the first common terminal 14 is selectively turned on or off through the first switching element 15 to switch the working mode of the first common terminal 14 , that is, The first common terminal 14 is switched to the working mode of transmitting electric power, or switched to the working mode of transmitting communication signals. Wherein, when the first switching element 15 is turned on, the electrical connection between the interactive terminal 122 of the first control circuit 12 and the first common terminal 14 is turned on, and the first common terminal 14 is used for communicating with the load device for communication signal interaction, At this time, the charging circuit 11 does not output power; and when the first switching element 15 is disconnected, the electrical connection between the interactive terminal 122 of the first control circuit 12 and the first common terminal 14 is disconnected, and the charging circuit 11 outputs Electric energy, the first common terminal 14 is used for outputting electric energy to the load device.

Further, the input end 124 of the first control circuit 12 is connected to the power supply 13 for providing the first control circuit 12 with electrical energy required for its normal operation. In addition, the first control circuit 12 may be an MCU (Microcontroller Unit, micro control unit) and other components integrated with a logic control circuit, for controlling the charging circuit 11, the first switching element 15 and interacting with the load device.

Proceed to Figure 1-2. In one embodiment, the charging device 1 further includes a level control circuit 16 . The level control circuit 16 is respectively connected to the interactive terminal 122 and the second output terminal 123 of the first control circuit 12, so that the level of the first control circuit 12 and the control circuit in the load device are matched, so as to avoid the signal caused by the level mismatch Interaction exceptions, etc.

As can be seen from the above, the charging device provided by the present invention can adjust the electric energy of the power source to a state where the load device can be directly used for charging and output it to the load device, so that the load device does not need to adjust the electric energy after receiving the electric energy from the charging device. , which can directly charge the battery of the load device, reduce the power loss caused by the load device adjusting the power from the charging device, and avoid the transmission of high-amplitude power between the charging device and the load device, reducing the power consumption. Power loss during transmission, thereby improving charging efficiency. Since the charging efficiency of the charging device is improved, the charging device with the same amount of power allows more load devices to be charged.

Please refer to FIG. 3 , which is a schematic structural diagram of an embodiment of a load device of the present invention.

In order to solve the technical problem of low charging efficiency between the charging device and the load device in the prior art, an embodiment of the present invention provides a load device 2, the load device 2 includes: a battery 21, a second switch element 22 and the second control circuit 23. The input terminal 221 of the second switching element 22 is used to connect a charging device independent of the load device 2 , and the output terminal 222 of the second switching element 22 is connected to the battery 21 . The interactive terminal 231 of the second control circuit 23 is used to connect to the charging equipment, and the output terminal 232 of the second control circuit 23 is connected to the control terminal 223 of the second switching element 22 to communicate with the charging equipment and use the communication signal to work. It includes outputting a switching signal to the second switching element 22 to turn it on, so that the electric energy from the charging device can directly charge the battery 21 without adjustment. Details are described below.

Please refer to FIGS. 3-4. FIG. 4 is a schematic structural diagram of another embodiment of the load device of the present invention.

In one embodiment, the load device 2 includes a battery 21 and a second switching element 22 . The input terminal 221 of the second switching element 22 is used to connect a charging device independent of the load device 2 , and the output terminal 222 of the second switching element 22 is connected to the battery 21 . That is, when the second switching element 22 is turned on, the electric energy from the charging device can reach the battery 21 through the second switching element 22 to charge the battery 21 of the load device 2 . Since the second switching element 22 does not have the function of adjusting the power, the power from the charging device can be directly used to charge the battery 21 without adjustment.

In this way, the power loss caused by the load device 2 adjusting the power from the charging device can be reduced; and the voltage value of the power does not need to be pre-adjusted to be higher than the amplitude required for charging the load device 2 (just adjust to the load device 2). Amplitude required for charging), can avoid the transmission of electric energy with higher amplitude between the charging device and the load device 2, reduce the electric energy loss during the electric energy transmission process, and thus improve the charging efficiency.

In addition, the load device 2 omits the built-in charging chip required in the traditional design, and instead the second switch element 22 directly receives electric energy for charging, which can reduce the cost of the load device 2 . Although the charging device needs to correspondingly increase the circuit for adjusting the power, because the charging device is usually designed to correspond to multiple load devices 2 to charge the multiple load devices 2 at the same time (for example, the charging box usually corresponds to at least two TWS earphones, etc.), wherein The cost saved by the load device 2 will be far greater than the cost added by the charging device adding a circuit for adjusting the power.

Optionally, the second switching element 22 may be a MOS transistor (metal-oxide-semiconductor field effect transistor) or the like.

The load device 2 also includes a second control circuit 23 . The interactive terminal 231 of the second control circuit 23 is used to connect to the charging equipment, and the output terminal 232 of the second control circuit 23 is connected to the control terminal 223 of the second switching element 22 to communicate with the charging equipment and use the communication signal to work. It includes outputting a switch signal to the second switch element 22 to make it turn on, so that the electric energy from the charging device can directly charge the battery 21 without adjustment.

Specifically, the interaction terminal 231 of the second control circuit 23 is used to perform communication signal interaction with the charging device after the charging device is connected, so as to realize the linkage operation between the charging device and the load device 2 . It includes the linkage work of the charging device charging the load device 2, specifically including the communication signal interaction between the load device 2 and the charging device through the interaction terminal 231 of the second control circuit 23 for the charging operation, which may include the load device 2 and the charging device. pairing, the charging device instructs the load device 2 to charge it, and the load device 2 feeds back information indicating confirmation and other communication signal interaction processes; The terminal 223 inputs the corresponding switching signal to the second switching element 22 so that the second switching element 22 is turned on (that is, the load device 2 works with the communication signal), so that the electric energy from the charging device can reach the load device 2 through the second switching element 22 The battery 21 is directly charged without adjustment.

Proceed to Figure 3-4. In one embodiment, the load device 2 further includes a second common terminal 24, and the second common terminal 24 is used to connect the charging device. Specifically, the second common terminal 24 is electrically connected to a corresponding terminal on the charging device (ie, the above-mentioned first common terminal), and is used for power transmission and communication signal interaction between the charging device and the load device 2 . The input terminal 221 of the second switching element 22 and the interaction terminal 231 of the second control circuit 23 are commonly connected to the second common terminal 24 .

That is to say, the power and communication signals of the load device 2 interact with the charging device through the same terminal (ie, the second common terminal 24 ). In the traditional design, the power and communication signals of the load device need to interact with the charging device through different terminals, which results in a more complex circuit structure of the traditional load device and a large number of terminals, which is not conducive to the simplification of the structure of the load device and the reduction in size. change. In this embodiment, the power and communication signals of the load device 2 interact with the charging device through the same terminal, which can reduce the number of terminals of the load device 2 and simplify the circuit structure of the load device 2, which is beneficial to the simplification of the structure and the size of the load device 2. downsize. Especially for TWS earphones and their corresponding charging boxes, a TWS earphone with a smaller volume (ie, the load device 2 ) can undoubtedly meet the user's requirements for the volume of the TWS earphone to the greatest extent, so as to be convenient for the user to wear and carry.

For the case that one charging device corresponds to multiple load devices 2, for example, one charging box charges at least two TWS earphones, etc., the above charging device is designed with multiple first common terminals, and the second common terminal 24 of the load device 2 is connected to the charging device. The corresponding first common terminal is electrically connected to perform signal interaction with the charging device.

Optionally, the second control circuit 23 may be an element integrated with a logic control circuit, such as an MCU (Microcontroller Unit, a micro control unit), a CPLD (Complex Programmable Logic Device, a complex programmable logic device), and is used to control the second switching element. 22 and interact with charging devices.

Proceed to Figure 3-4. In one embodiment, the load device 2 also includes a tank circuit 25 . The input end of the energy storage circuit 25 is used to connect the charging device, and the output end of the energy storage circuit 25 is connected to the input end 233 of the second control circuit 23 . Wherein, the energy storage circuit 25 is used for receiving the electric energy from the charging device and storing it for the second control circuit 23 to work.

Specifically, when the charging device attempts to interact with the load device 2 with a communication signal, the charging device transmits a communication signal to the load device 2 , and the electrical energy of the communication signal can charge the energy storage circuit 25 for the second control circuit 23 to work. . Moreover, when the charging device outputs electrical energy to the load device 2, the electrical energy can also charge the energy storage circuit 25, thereby enabling the second control circuit 23 to work normally.

Further, the tank circuit 25 includes a one-way conduction element 251 and a capacitor 252 . The input end of the one-way conducting element 251 is used to connect to the charging device, and the output end of the one-way conducting element 251 is connected to the input end 233 of the second control circuit 23 . The positive electrode of the capacitor 252 is connected between the output end of the one-way conducting element 251 and the input end 233 of the second control circuit 23, the negative electrode of the capacitor 252 is grounded, and the capacitor 252 is used to receive the electrical energy from the charging device and store it for use. The second control circuit 23 operates. Among them, the one-way conduction element 251 is used to prevent current backflow.

Alternatively, the one-way conduction element 251 may be a diode or the like. The unidirectional conduction characteristic of the diode is used to limit the current flow and prevent the current from being reversed. The cost of the diode as the one-way conduction element 251 is low, which is beneficial to reduce the cost of the load device 2 .

It can be seen from the above that the load device provided by the present invention can directly charge the battery of the load device without adjustment after receiving the electric energy from the charging device, thereby reducing the problem caused by the load device adjusting the electric energy from the charging device. The power loss can be avoided, and the power transmission of higher amplitude between the charging device and the load device can be avoided, the power loss during the power transmission process is reduced, and the charging efficiency is improved. Since the charging efficiency of the charging device is improved, the charging device with the same amount of power allows more load devices to be charged.

Please refer to FIG. 5 , which is a schematic structural diagram of an embodiment of a charging system of the present invention.

In one embodiment, the charging system includes a charging device 1 and a load device 2 . The charging device 1 is used to charge the load device 2 . The charging system may be a system composed of a TWS headset and a charging box, and the like.

The charging apparatus 1 includes a charging circuit 11 and a first control circuit 12 . The first input terminal 111 of the charging circuit 11 is connected to the power source 13, and the output terminal 112 of the charging circuit 11 is used to connect to the load device 2 independent of the charging device 1, so as to adjust the power of the power source 13 so that the load device 2 can be directly used for charging state and output to load device 2. The first output terminal 121 of the first control circuit 12 is connected to the second input terminal 113 of the charging circuit 11 for controlling whether the charging circuit 11 outputs power to the load device 2 or not, and the interactive terminal 122 of the first control circuit 12 is used to supply the load The device 2 sends out a communication signal, so that the load device 2 uses the communication signal to work, including receiving electric energy for charging.

The load device 2 includes a battery 21 , a second switching element 22 and a second control circuit 23 . The input terminal 221 of the second switching element 22 is used to connect to the output terminal 112 of the charging circuit 11 of the charging device 1 , and the output terminal 222 of the second switching element 22 is connected to the battery 21 . The interactive terminal 231 of the second control circuit 23 is used to connect to the interactive terminal 122 of the first control circuit 12 of the charging device 1 , and the output terminal 232 of the second control circuit 23 is connected to the control terminal 223 of the second switching element 22 to connect with the charging device 1 . 1. Interact with communication signals, and use the communication signals to work, including outputting a switch signal to the second switch element 22 to turn it on, so that the electric energy from the charging device 1 can directly charge the battery 21 without adjustment.

It should be noted that the specific circuit structures and working principles of the charging device 1 and the load device 2 have been described in detail in the above embodiments, and will not be repeated here. For the TWS earphone and the charging box, the charging device 1 can charge at least two load devices 2, including at least two load devices 2, left and right earphones, and the circuit structures of the left and right earphones are the same. FIG. 6 shows a situation where the charging device 1 charges a plurality of load devices 2 .

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A charging device, wherein the charging device comprises: A charging circuit, a first input terminal of the charging circuit is connected to a power source, and an output terminal of the charging circuit is used to connect to a load device independent of the charging device, so as to adjust the power of the power source to a level that the load device can The state is directly used for charging and output to the load device; a first control circuit, the first output end of the first control circuit is connected to the second input end of the charging circuit, and is used to control whether the charging circuit outputs electric energy to the load device or not, the first control circuit The interaction terminal is used to interact with the load device with a communication signal, so that the load device works by using the communication signal, including receiving the electric energy for charging. 2 . The charging device according to claim 1 , wherein the charging device further comprises a first common terminal, and the output terminal of the charging circuit and the interactive terminal of the first control circuit are commonly connected to the first common terminal. 3 . A common terminal, the first common terminal is used for connecting the load device. 3 . The charging device according to claim 2 , wherein the charging device further comprises a first switching element, the control end of the first switching element is connected to the second output end of the first control circuit, and the 3 . The first end of the first switch element is connected to the interactive end of the first control circuit, the second end of the first switch element is connected to the output end of the charging circuit, and the first switch element is used to control the The electrical connection between the interactive end of the first control circuit and the first common terminal is turned on and off. 4 . The charging device according to claim 1 , wherein the charging device further comprises a level control circuit, and the level control circuit is respectively connected to the interactive terminal and the second output terminal of the first control circuit. 5 . 5. The charging device of claim 1, wherein the charging circuit is a DC-DC charging circuit. 6. A load device, characterized in that the load device comprises: Battery; a second switch element, the input end of the second switch element is used to connect to a charging device independent of the load device, and the output end of the second switch element is connected to the battery; A second control circuit, the interactive end of the second control circuit is used to connect to the charging device, and the output end of the second control circuit is connected to the control end of the second switching element to communicate with the charging device The signals are exchanged, and the communication signal is used to work, including outputting a switch signal to the second switch element to make it turn on, so that the electric energy from the charging device can directly charge the battery without adjustment. 7 . The load device according to claim 6 , wherein the load device further comprises a second common terminal, and the input end of the second switch element and the interactive end of the second control circuit are commonly connected to the The second common terminal is used to connect the charging device. 8 . The load device according to claim 6 , wherein the load device further comprises an energy storage circuit, the input end of the energy storage circuit is used to connect the charging device, and the output end of the energy storage circuit is used to connect the charging device. 9 . Connected to the input end of the second control circuit, the energy storage circuit is used for receiving the electric energy from the charging device and storing it for the second control circuit to work. 9. The load device according to claim 8, wherein the energy storage circuit comprises a one-way conduction element and a capacitor; The input end of the one-way conduction element is used to connect to the charging device, and the output end of the one-way conduction element is connected to the input end of the second control circuit; The anode of the capacitor is connected between the output end of the one-way conducting element and the input end of the second control circuit, the cathode of the capacitor is grounded, and the capacitor is used to receive the electric energy from the charging device and It is stored for the operation of the second control circuit. 10. A charging system, wherein the charging system comprises a charging device and a load device; The charging equipment includes: A charging circuit, a first input terminal of the charging circuit is connected to a power source, and an output terminal of the charging circuit is used to connect to the load device independent of the charging device, so as to adjust the power of the power source to the load The device can be directly used for charging and output to the load device; a first control circuit, the first output end of the first control circuit is connected to the second input end of the charging circuit for controlling whether the charging circuit outputs electric energy to the load device or not, the first control circuit The interactive terminal is used to interact with the load device with communication signals, so that the load device works by using the communication signals, including receiving the electric energy for charging; The load equipment includes: Battery; a second switch element, the input end of the second switch element is used to connect to the output end of the charging circuit of the charging device, and the output end of the second switch element is connected to the battery; A second control circuit, the interactive end of the second control circuit is used to connect to the interactive end of the first control circuit of the charging device, and the output end of the second control circuit is connected to the control of the second switching element terminal, to interact with the charging device with a communication signal, and use the communication signal to work, including outputting a switch signal to the second switching element to turn it on, so that the electric energy from the charging device is directly supplied to the charging device without adjustment. The battery is charged.

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