CN115296377B

CN115296377B - Electronic device

Info

Publication number: CN115296377B
Application number: CN202211210381.7A
Authority: CN
Inventors: 王兴华
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-03-24
Anticipated expiration: 2042-09-30
Also published as: CN115296377A

Abstract

The application discloses electronic equipment belongs to electron technical field. The electronic device includes: the battery module comprises a first circuit board, a battery module, a mainboard and a second circuit board. The first circuit board is provided with a charging interface. The battery module comprises a battery protection plate and a battery core which are connected. The battery protection board is located between the first circuit board and the battery core, and the battery core is located between the battery protection board and the mainboard. The second circuit board is connected between the first circuit board and the main board. The first circuit board or the battery protection board comprises a charging circuit, and the charging circuit is connected between the charging interface and the battery core so as to charge the battery core through the charging interface and the charging circuit. In the electronic device, the charging circuit is arranged on the first circuit board or the battery protection board, so that the charging circuit which is easy to generate heat and the SOC are arranged at different positions of the electronic device. Therefore, heat generated by the electronic equipment can be dispersed, the heat dissipation capacity of the electronic equipment is improved, and the use experience of the electronic equipment is improved.

Description

Electronic device

Technical Field

The present application relates to the field of electronic technologies, and in particular, to an electronic device.

Background

The electronic equipment comprises a small plate, a main board, a flexible circuit board and a battery module. Wherein, be provided with the interface that charges on the platelet, be provided with System On Chip (SOC) on the mainboard.

In the related art, a charging circuit is further arranged on the mainboard. The charging interface on the small plate is connected with the input end of a charging circuit on the main board through a flexible circuit board, and the output end of the charging circuit is connected with the battery module. When the charging interface inputs an electric signal, the electric signal can be input into the battery module through the flexible circuit board and the charging circuit, so that the battery module is charged.

However, since the charging circuit and the SOC which are prone to generate heat are both disposed on the motherboard, this may cause concentrated heat generation and poor heat dissipation capability of the electronic device, thereby affecting the use experience of the electronic device.

Disclosure of Invention

The application provides an electronic equipment, this electronic equipment's dispersion that generates heat, the heat-sinking capability is good to can promote electronic equipment's use and experience. The technical scheme is as follows:

an electronic device, comprising: the battery module comprises a first circuit board, a battery module, a mainboard and a second circuit board. The first circuit board, the main board and the battery protection board all include a Printed Circuit Board (PCB) and an electronic device disposed on the PCB. The first circuit board may be a small board in an electronic device, and generally, the area of the first circuit board is smaller than that of the main board. The first circuit board is provided with a charging interface, and the charging interface can be a Universal Serial Bus (USB) Type-C interface. The battery module comprises a battery protection board and a battery core connected with the battery protection board. The battery core is an electric storage part in the battery module and is used for storing electric energy. The battery protection board is a protection part in the battery module and is used for preventing overvoltage or overcurrent of the battery cell. In the position relation, in this application, the battery protection shield is located between first circuit board and the electric core, and the electric core is located between battery protection shield and the mainboard. The second circuit board is a flexible printed circuit board (FPC). The second circuit board is connected between the first circuit board and the mainboard, so that electric signals can be transmitted between the first circuit board and the mainboard.

One of the first circuit board and the battery protection board is also integrated with a charging circuit. The charging circuit is used for converting direct current/direct current (DC/DC) to an electrical signal, such as boosting or reducing the voltage of the DC electrical signal. The charging circuit is connected between the charging interface and the battery cell. When the battery module of the electronic equipment is charged, the electric signal is input from the charging interface, and is input to the battery cell for electric energy storage after being subjected to DC/DC conversion by the charging circuit. In the electronic device, the charging circuit is arranged on the first circuit board or the battery protection board, so that the charging circuit which is easy to generate heat and the SOC are arranged at different positions of the electronic device. Therefore, heat generated by the electronic equipment can be dispersed, the heat dissipation capacity of the electronic equipment is improved, and the use experience of the electronic equipment is improved. Simultaneously, this electronic equipment sets up the battery protection shield in the battery module in the position that is close to the interface that charges, can make anodal ear and the negative pole ear of electricity core be located the position that is close to the interface that charges like this. Therefore, when the battery module of the electronic equipment is charged, the transmission path of the electric signal can be shortened, and the electric energy loss is reduced.

In some embodiments, the electronic device further comprises a metal bezel and a back cover. For convenience of description, a first direction, a second direction and a third direction are defined herein, and the first direction, the second direction and the third direction are perpendicular to each other. First circuit board, battery module and mainboard are arranged along first direction, and first circuit board, battery module and mainboard all extend along the plane at first direction and third direction place. The second direction is the thickness direction of the first circuit board, the battery module and the main board. In the second direction, first circuit board, battery module and mainboard all press from both sides and locate between metal center and the back lid.

Further, the electronic device may also include a heat spreader material. The soaking material can be a silica gel pad or/and a vacuum chamber soaking plate (VC). The heat spreader material may be located between at least one of the first circuit board, the motherboard, and at least one of the metal bezel and the back cover.

The electronic device of the present application will be described below in terms of two possible implementations, namely, a charging circuit disposed on the first circuit board and a charging circuit disposed on the battery protection board.

In a first possible implementation manner, the charging circuit is disposed on the first circuit board, that is, the first circuit board includes the charging circuit.

The charging circuit comprises a charging chip, a first connector and a first resistor. The input of the charging chip is connected with the charging interface. The output end of the charging chip is connected with the first end of the first connector, the second end of the first connector is connected with the first end of the first resistor, and the second end of the first resistor is connected with the grounding end of the charging chip. The first sampling end of the charging chip is connected with the first end of the first resistor, and the second sampling end of the charging chip is connected with the second end of the first resistor so as to detect the voltage of the first resistor. The charging chip is used for adjusting the output voltage of the output end of the charging chip according to the voltage of the first resistor.

The battery protection board comprises a protection circuit, and the protection circuit comprises a second connector, a second resistor, a protection switch and a protection chip. The first end of the second connector is connected with the first end of the first connector and the positive tab of the battery cell. And the negative pole lug of the battery cell is connected with the first end of the second resistor, and the second end of the second resistor is connected with the first end of the protection switch. The second end of the second connector is connected with the second end of the protection switch and the second end of the first connector. The first sampling end of the protection chip is connected with the first end of the second resistor, the second sampling end of the protection chip is connected with the second end of the second resistor, the output end of the protection chip is connected with the control end of the protection switch, and the protection chip is used for detecting the voltage of the second resistor and controlling the on and off of the protection switch according to the voltage of the second resistor.

In this possible implementation, the electronic device further includes a third circuit board, and the third circuit board is an FPC. The third circuit board is connected between the first circuit board and the battery protection board. That is, the third circuit board is connected between the first connector and the second connector.

In a second possible implementation manner, the battery protection board includes a charging circuit, and the charging circuit includes a charging chip and a third resistor. The input of the charging chip is connected with the charging interface. The output end of the charging chip is connected with the positive tab of the battery cell, the negative tab of the battery cell is connected with the first end of the third resistor, and the second end of the third resistor is connected with the grounding end of the charging chip. The first sampling end of the charging chip is connected with the first end of the third resistor, and the second sampling end of the charging chip is connected with the second end of the third resistor so as to detect the voltage of the third resistor. The charging chip is used for adjusting the output voltage of the output end of the charging chip according to the voltage of the third resistor.

Further, the battery protection board further includes: a protection switch and a protection chip. The first end of the protection switch is connected with the second end of the third resistor, and the second end of the protection switch is connected with the grounding end of the charging chip. The first sampling end of the protection chip is connected with the first end of the third resistor, the second sampling end of the protection chip is connected with the second end of the third resistor, the output end of the protection chip is connected with the control end of the protection switch, and the protection chip is used for detecting the voltage of the third resistor and controlling the on and off of the protection switch according to the voltage of the third resistor. In this embodiment, the charging circuit and the protection circuit may share the third resistor as the sampling resistor. Thus, a resistor can be saved, thereby saving the internal space of the electronic device and saving the cost.

In some embodiments, the battery protection plate may further include an electricity meter. The first end of the fuel gauge is connected with the positive electrode lug of the battery cell, the second end of the fuel gauge is connected with the negative electrode lug of the battery cell and the first end of the third resistor, and the third end of the fuel gauge is connected with the second end of the third resistor. The electricity meter is used for detecting the voltage of the battery cell and the voltage of the third resistor and determining the electric quantity of the battery cell according to the voltage of the battery cell and the voltage of the third resistor. In this embodiment, the charging circuit and the fuel gauge are integrated in the battery protection board. So, at the battery protection shield stage, battery protection shield and electric core equipment form between the battery module promptly, can calibrate the coulometer to can make things convenient for the calibration of coulometer. In addition, because the charging circuit is integrated in the battery protection board, different battery protection boards and different battery cores are combined to obtain the battery modules with different powers and capacities, so that the power normalization of the battery protection board is facilitated, and the reusability of the battery protection board can be improved.

In this possible implementation, the electronic device further includes a fourth circuit board. The fourth circuit board is an FPC. The fourth circuit board is connected between the first circuit board and the battery protection board. What differs from the third circuit board is: the third circuit board is connected between the output end of the charging circuit and the input end of the protection circuit; and the fourth circuit board is connected between the first circuit board and the input end of the charging circuit. In this case, the third circuit board is generally large in width and thickness, while the fourth circuit board is small in width and thickness. Therefore, on one hand, the fourth circuit board is bent; on the other hand, the space occupied by the fourth circuit board is smaller, and the saved space can be used for increasing the volume of the battery cell, so that the capacity of the battery cell for storing electric energy is increased.

Drawings

Fig. 1 is an external view of an electronic device;

fig. 2 is a schematic view of an internal structure of an electronic device in the related art;

fig. 3 is a schematic internal structure diagram of a first electronic device according to an embodiment of the present application;

fig. 4 is a schematic internal structure diagram of a second electronic device provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;

fig. 6 is a schematic cross-sectional structure diagram of a first electronic device provided in an embodiment of the present application;

fig. 7 is a schematic cross-sectional structure diagram of a second electronic device provided in the embodiment of the present application;

fig. 8 is a circuit configuration diagram of a first electronic device according to an embodiment of the present application;

fig. 9 is a circuit configuration diagram of a second electronic device according to an embodiment of the present application;

fig. 10 is a circuit configuration diagram of a third electronic device provided in the embodiment of the present application;

fig. 11 is a circuit configuration diagram of a fourth electronic device according to an embodiment of the present application;

fig. 12 is a circuit configuration diagram of a fifth electronic device according to an embodiment of the present application;

fig. 13 is a circuit configuration diagram of a sixth electronic device according to an embodiment of the present application;

fig. 14 is a circuit configuration diagram of a seventh electronic device according to an embodiment of the present application;

fig. 15 is a circuit configuration diagram of an eighth electronic device according to an embodiment of the present application;

fig. 16 is a circuit configuration diagram of a ninth electronic device according to an embodiment of the present application;

fig. 17 is a circuit configuration diagram of a tenth electronic device according to an embodiment of the present application.

Wherein, the meanings represented by the reference numerals are as follows:

the related technology comprises the following steps:

10. an electronic device;

103. a middle frame;

105. a rear cover;

110. a platelet;

112. a charging interface;

120. a battery module;

122. a battery protection plate;

124. an electric core;

130. a main board;

132. a charging circuit;

140. a flexible circuit board;

150. a battery connecting plate;

the application:

20. an electronic device;

201. a charging circuit;

202. a charging chip;

202a, a first charging chip;

202b, a second charging chip;

204. a first connector;

203. a metal middle frame;

205. a rear cover;

207. soaking the material;

210. a first circuit board;

212. a charging interface;

220. a battery module;

222. a battery protection plate;

2221. a protection circuit;

2222. a second connector;

2224. protecting the chip;

224. an electric core;

2242. a first cell;

2244. a second cell;

230. a main board;

240. a second circuit board;

250. a third circuit board;

260. a fourth circuit board;

270. and (4) an electricity meter.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

It should be understood that reference to "a plurality" in this application means two or more. In the description of this application, "/" indicates an inclusive meaning, for example, A/B may indicate either A or B; "and/or" herein is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, for the convenience of clearly describing the technical solutions of the present application, the terms "first", "second", and the like are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

Before explaining the electronic device provided in the embodiment of the present application in detail, an application scenario thereof is explained.

The electronic equipment comprises a mobile phone, a tablet computer and the like. Taking the electronic device as a mobile phone as an example, fig. 1 is an external schematic view of the electronic device 10. As shown in fig. 1, the electronic device 10 includes a rear cover 105 and a charging interface 112. Here, the rear cover 105 is a cover body that covers the electronic components inside the electronic device 10 at a position facing the display screen in the electronic device 10 when the display screen of the electronic device 10 is the front surface. The internal structure of the electronic device 10 shown in fig. 2 can be observed by removing the rear cover 105 of the electronic device 10. The internal structure of the electronic device 10 shown in fig. 2 is located between the rear cover 105 and the middle frame 103 of the electronic device 10.

As shown in fig. 2, the electronic device 10 includes a small board 110, a battery module 120, a main board 130, a flexible circuit board 140, and a battery connection board 150. The charging interface 112 is provided on the small plate 110. The motherboard 130 has an SOC, which may include a baseband, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), and the like of the electronic device 10. The battery module 120 includes a battery protection plate 122 and a battery core 124 connected together. In the related art, the main board 130 is further provided with a charging circuit 132. The charging interface 112 on the small board 110 is connected to the input terminal of the charging circuit 132 on the main board 130 through the small board 110 and the flexible circuit board 140. The output terminal of the charging circuit 132 is connected to the battery protection plate 122 of the battery module 120 through the battery connection plate 150.

When the battery module 120 of the electronic device 10 is charged, an electrical signal is input from the charging interface 112 and reaches the charging circuit 132 through the small board 110, the flexible circuit board 140 and the main board 130. The charging circuit 132 boosts or lowers the voltage of the input electric signal, and then outputs the electric signal to the battery protection plate 122 of the battery module 120 through the main board 130 and the battery connection plate 150. The electrical signal can enter the battery core 124 through the battery protection plate 122 and be stored, so that the purpose of energy storage is achieved. When the battery module 120 of the electronic device 10 discharges, the electrical signal output by the battery core 124 reaches the motherboard 130 through the battery protection board 122 and the battery connection board 150, so as to supply power to the motherboard 130.

However, at least the following technical problems exist in the related art: 1. when the electronic device 10 is in operation, the charging circuit 132 and the SOC that are prone to heat generation are both disposed on the motherboard 130, which may result in concentrated heat generation and poor heat dissipation of the electronic device 10. Meanwhile, if the electronic device 10 is in a heavy-load scene (e.g., the electronic device 10 is in the charging state and the game mode at the same time), in order to reduce heat generation, the electronic device 10 may reduce the charging speed, which may affect the use experience of the electronic device 10. 2. When the battery module 120 of the electronic device 10 is charged, after the electrical signal is input through the charging interface 112, the electrical signal needs to be sequentially input into the battery module 120 through the small board 110, the flexible circuit board 140, the main board 130, the charging circuit 132 and the battery connecting board 150, and the transmission path is long, which results in large electric energy loss on one hand, and large charging current on the other hand, which is also easy to affect the normal operation of devices such as compass due to electromagnetic induction. 3. The battery connection plate 150 is connected between the output terminal of the charging circuit 132 and the battery module 120. In general, the charging circuit 132 steps down an input electrical signal to output a low-voltage high-current electrical signal to the battery module 120. In this case, in order to transmit the electrical signal with low voltage and high current, the width and thickness of the battery protection plate 122 are large, which wastes the internal space of the electronic device 10, affects the capacity of the battery cell 124 for storing electrical energy, and generates heat seriously.

Based on the above problem, the embodiment of the application provides an electronic device, and this electronic device generates heat dispersedly, and the heat-sinking capability is good to can promote electronic device's use and experience.

The electronic device provided by the embodiments of the present application is explained in detail below. In the embodiment of the present application, the relationship between two devices includes a positional relationship and a connection relationship. It is to be understood that, in the embodiments of the present application, when it is described that the a device is "located" between the B device and the C device, that is, the positional relationship between the devices is described. For example, when it is described that the battery protection plate is located between the first circuit board and the battery cell, that is, in a positional relationship, the battery protection plate is sandwiched between the first circuit board and the battery cell. When it is described that an a device is connected to a B device or an a device is connected between a B device and a C device, a connection relationship between the devices is described. Herein, the connection refers to an electrical connection, that is, a connection between two or more (including two) devices through a wire or a wireless connection, so as to transmit an electrical signal. For example, when the charging circuit is connected between the charging interface and the battery cell, that is, in the circuit structure, the charging interface is connected to the battery cell through the charging circuit, so that an electrical signal input by the charging interface can be output to the battery cell through the charging circuit.

Fig. 3 and fig. 4 are schematic diagrams of internal structures of two different electronic devices 20 provided in the embodiment of the present application. As shown in fig. 3 and 4, the electronic device 20 includes a first circuit board 210, a battery module 220, a main board 230, and a second circuit board 240.

The first circuit board 210 includes a PCB and electronic devices disposed on the PCB. The PCB is used to provide electrical connection relationship for the electronic devices, so that electrical signals can be transmitted between a plurality of electronic devices disposed on one PCB. Generally, the electronic devices disposed on the first circuit board 210 may include, for example, a Microphone (MIC), a speaker, a charging interface 212, and the charging interface 212 may be a USB Type-C interface, a Micro USB interface, or a lightning interface.

Fig. 5 is a schematic structural diagram of a battery module 220 according to an embodiment of the present disclosure. As shown in fig. 5, the battery module 220 includes a battery cell 224 and a battery protection plate 222. The battery cell 224 is an electricity storage portion in the battery module 220, and is used for storing electric energy. Cell 224 typically has a positive tab and a negative tab. In the drawings of the present application, the positive tab of the cell 224 is denoted by a "+" symbol, and the negative tab of the cell 224 is denoted by a "-" symbol. The battery protection plate 222 is a protection part in the battery module 220. The battery protection board 222 also includes a PCB and electronics disposed on the PCB. Generally, at least a portion of the electronic devices in the battery protection board 222 are connected through the PCB to form a battery protection circuit. When the battery module 220 of the electronic device 20 is charged, the electrical signal may be input to the electric core 224 through the battery protection circuit and stored, so as to achieve the purpose of storing energy. When the battery module 220 of the electronic device 20 discharges, the electrical signal output by the battery cell 224 may be output to the motherboard 230 through the battery protection circuit, so as to supply power to the motherboard 230. In this process, the battery protection circuit may prevent the voltage input or output from the battery cell 224 from being too high (i.e., overvoltage), and may also prevent the current input or output from the battery cell 224 from being too high (i.e., overcurrent).

The main board 230 also includes a PCB and electronic devices disposed on the PCB. In general, the first circuit board 210 may be a small board in the electronic device 20. When the first circuit board 210 is a small board, the area of the main board 230 is larger than that of the first circuit board 210, that is, the PCB area of the main board 230 is larger than that of the first circuit board 210, and the electronic devices in the main board 230 are more. In some other embodiments, which are not shown, the area of the first circuit board 210 relative to the main board 230 may also be larger, which is not limited herein. The electronic devices disposed on the motherboard 230 may include, for example, an SOC (i.e., a baseband, a CPU, a GPU, and the like of the electronic device 20), a radio frequency module (including a power amplifier and a radio frequency antenna for radio frequency), a memory, a touch processor, a sensor, a camera, a speaker, and the like.

The second circuit board 240 is an FPC, which is a flexible printed circuit board made of Polyimide (PI) or Polyester (PET) film as a base material. The second circuit board 240 is connected between the first circuit board 210 and the main board 230 so that transmission of electrical signals between the first circuit board 210 and the main board 230 is possible. Generally, the second circuit board 240 may be used to transmit both power and communication signals. In some embodiments, the second circuit board 240 supports an integrated circuit bus (I2C) communication mode.

In a positional relationship, the battery protection plate 222 is located between the first circuit board 210 and the cells 224, and the cells 224 are located between the battery protection plate 222 and the main board 230. Specifically, in the embodiment of the present application, for convenience of description, the first direction Y, the second direction Z, and the third direction X are defined herein, and the first direction Y, the second direction Z, and the third direction X are perpendicular to each other two by two. As shown in fig. 3 and 4, the first circuit board 210, the battery module 220, and the main board 230 are arranged along the first direction Y, and the first circuit board 210, the battery module 220, and the main board 230 all extend along a plane in which the first direction Y and the third direction X are located. The second direction Z is a thickness direction of the first circuit board 210, the battery module 220, and the main board 230.

The charging circuit 201 is disposed on the first circuit board 210 or the battery protection board 222, that is, one of the first circuit board 210 and the battery protection board 222 is integrated with the charging circuit 201. The charging circuit 201 is used for DC/DC conversion of an electrical signal, such as boosting or reducing a DC electrical signal. In some specific embodiments, the charging circuit 201 is configured to step down the dc electrical signal, such as converting 20V dc into 10V and outputting the 10V dc. In the embodiment shown in fig. 3, the charging circuit 201 is disposed on the first circuit board 210, and is connected between the charging interface 212 and the battery cell 224. In this case, when the battery module 220 of the electronic device 20 is charged, an electrical signal is input from the charging interface 212, subjected to DC/DC conversion by the charging circuit 201, and then input to the electric cell 224 for electric energy storage. In the embodiment shown in fig. 4, the charging circuit 201 is disposed on the battery protection board 222 and connected between the charging interface 212 and the battery cell 224. In this case, when the battery module 220 of the electronic device 20 is charged, an electric signal is also input from the charging interface 212, subjected to DC/DC conversion by the charging circuit 201, and then input to the battery cell 224 for electric energy storage.

In the electronic device 20, the charging circuit 201 is provided on the first circuit board 210 or the battery protection board 222, and the charging circuit 201 and the SOC, which are likely to generate heat, are provided at different positions of the electronic device 20. In this way, the heat generated by the electronic device 20 can be dispersed, so that the heat dissipation capability of the electronic device 20 is improved, and the use experience of the electronic device 20 is improved. Meanwhile, when the electronic device 20 is in a heavy-load scene, the charging speed is not reduced in order to reduce heat generation. In the electronic device 20, the battery protection plate 222 of the battery module 220 is disposed at a position close to the charging interface 212, so that the positive electrode tab and the negative electrode tab of the battery cell 224 can be positioned close to the charging interface 212. Thus, when the battery module 220 of the electronic device 20 is charged, the transmission path of the electrical signal can be shortened, so as to reduce the power consumption, and the influence of the charging current on the normal operation of the devices such as the compass can be reduced, i.e., the current interference can be reduced. The charging circuit 201 is disposed on the first circuit board 210 or the battery protection board 222, so as to improve the utilization rate of the main board 230.

In some embodiments, the electronic device 20 may further include a third circuit board 250 or a fourth circuit board 260 based on two possible implementations that the charging circuit 201 is disposed on the first circuit board 210 and the charging circuit 201 is disposed on the battery protection board 222.

Specifically, in a first possible implementation manner, as shown in fig. 3, when the charging circuit 201 is disposed on the first circuit board 210, the electronic device 20 may further include a third circuit board 250. The third circuit board 250 is an FPC and is connected between the first circuit board 210 and the battery protection plate 222 so that transmission of an electrical signal between the first circuit board 210 and the battery protection plate 222 is possible. That is, at least a portion of the third circuit board 250 is connected between the output terminal of the charging circuit 201 and the battery protection plate 222.

When the battery module 220 of the electronic device 20 is charged, an electrical signal is input from the charging interface 212 and reaches the charging circuit 201 through the first circuit board 210. The charging circuit 201 performs DC/DC conversion on the input electrical signal, and then outputs the electrical signal to the battery protection board 222 of the battery module 220 through the first circuit board 210 and the third circuit board 250. The electrical signal may enter the electrical core 224 through the battery protection board 222 and be stored, thereby achieving the purpose of energy storage. When the battery module 220 of the electronic device 20 discharges, the electrical signal output by the battery cell 224 reaches the motherboard 230 through the battery protection board 222, the third circuit board 250, the first circuit board 210, and the second circuit board 240, so as to supply power to the motherboard 230. It can be seen that, when the battery module 220 of the electronic device 20 is charged, the transmission path of the electrical signal can be shortened, thereby reducing power consumption and current interference. In this embodiment, although the transmission path of the electrical signal during the discharging of the battery module 220 of the electronic device 20 is increased, the performance of the electronic device 20 is improved as a whole because the current during the discharging of the battery module 220 of the electronic device 20 is small and the discharge impedance is only about 10 milliohms (m Ω) after the transmission path is increased.

In a second possible implementation manner, as shown in fig. 4, when the charging circuit 201 is disposed on the battery protection board 222, the electronic device 20 may further include a fourth circuit board 260. The fourth circuit board 260 is an FPC and is connected between the first circuit board 210 and the battery protection plate 222 so that transmission of an electrical signal between the first circuit board 210 and the battery protection plate 222 is possible. What differs from the third circuit board 250 is: the third circuit board 250 is connected between the output terminal of the charging circuit 201 and the input terminal of the protection circuit 2221; the fourth circuit board 260 is connected between the first circuit board 210 and the input terminal of the charging circuit 201.

When the battery module 220 of the electronic device 20 is charged, an electrical signal is input from the charging interface 212, and reaches the charging circuit 201 on the battery protection board 222 through the first circuit board 210 and the fourth circuit board 260. The charging circuit 201 performs DC/DC conversion on the input electrical signal, and then outputs the electrical signal to the electrical core 224, thereby achieving the purpose of energy storage. When the battery module 220 of the electronic device 20 discharges, the electrical signal output by the battery cell 224 reaches the motherboard 230 through the battery protection board 222, the fourth circuit board 260, the first circuit board 210, and the second circuit board 240, so as to supply power to the motherboard 230. It can be seen that, in this possible implementation manner, the transmission path of the electrical signal can also be shortened when the battery module 220 of the electronic device 20 is charged, so as to reduce the power consumption and reduce the current interference. As described above, the charging circuit 201 is configured to input a high-voltage, low-current electrical signal, and to step down the input electrical signal, thereby outputting a low-voltage, high-current electrical signal. In this case, the width and thickness of the fourth circuit board 260 connected between the first circuit board 210 and the input terminal of the charging circuit 201 are small. Thus, on the one hand, bending of the fourth circuit board 260 is facilitated; on the other hand, the space occupied by the fourth circuit board 260 is smaller, and the saved space can be used for increasing the volume of the battery cell 224, so that the capacity of the battery cell 224 for storing electric energy is increased; in yet another aspect, heat generation and charge loss may be reduced.

Fig. 6 is a schematic cross-sectional structure diagram of an electronic device 20 according to an embodiment of the present disclosure, in which a cross section is perpendicular to a plane formed by the first direction Y and the third direction X. That is, the cross section is a plane formed by the first direction Y and the second direction Z. As shown in fig. 6, in some embodiments, the electronic device 20 further includes a metal bezel 203 and a back cover 205. In the second direction Z, the first circuit board 210, the battery module 220, and the main board 230 are sandwiched between the metal middle frame 203 and the rear cover 205. In some specific embodiments, the first circuit board 210, the battery protection board 222, and the ground GND on the main board 230 of the electronic device 20 may be connected to the metal middle frame 203. In this way, when the battery module 220 of the electronic device 20 is charged, the metal middle frame 203 can be used for reflowing. In the embodiment of the present application, the first circuit board 210, the battery module 220, and the main board 230 may be disposed without overlapping each other along the second direction Z. The second circuit board 240 may be located between the battery module 220 and the metal middle frame 203, or between the battery module 220 and the rear cover 205, which is not limited. In some specific embodiments, when the electronic device 20 further includes a display screen and a touch panel, the display screen and the touch panel may be located on a side of the metal middle frame 203 away from the back cover 205, which are not described in detail again.

Further, fig. 7 is a schematic cross-sectional structure diagram of another electronic device 20 provided in the embodiment of the present application, where a cross-sectional direction is the same as the cross-sectional direction in the embodiment shown in fig. 6. As shown in fig. 7, a heat spreader material 207 may also be included in the electronic device 20. The soaking material 207 may be a silicone gasket or VC. The heat spreader material 207 may be located between at least one of the first circuit board 210, the motherboard 230, and at least one of the metal bezel 203, the back cover 205. That is, the soaking material 207 may be located between the first circuit board 210 and the metal middle frame 203, between the first circuit board 210 and the back cover 205, between the main board 230 and the metal middle frame 203, or between the main board 230 and the back cover 205. In other embodiments, the soaking material 207 may also be located between at least one of the battery cell 224 and the battery protection plate 222 and at least one of the metal middle frame 203 and the back cover 205, which will not be described in detail.

The circuit structure of the electronic device 20 provided in the embodiment of the present application will be described in detail below in terms of two possible implementations, i.e., the charging circuit 201 is disposed on the first circuit board 210, and the charging circuit 201 is disposed on the battery protection board 222.

In a first possible implementation manner, as shown in fig. 3, the internal structure of the electronic device 20 is that the charging circuit 201 is disposed on the first circuit board 210, that is, the first circuit board 210 includes the charging circuit 201.

Fig. 8 is a circuit configuration diagram of an electronic device 20 according to an embodiment of the present application. As shown in fig. 8, when the charging circuit 201 is disposed on the first circuit board 210, the charging circuit 201 includes a charging chip 202, a first connector 204, and a first resistor R1.

Specifically, the first connector 204 may be a connection socket, a contact or a port for connection, or the like. The first resistor R1 is a sampling resistor. The charging chip 202 is used for DC/DC conversion of an electrical signal, and may include at least one of a buck converter (buck) circuit, a boost converter (boost) circuit, a boost-buck converter (boost-buck) circuit, and a switched capacitor circuit therein. The charging chip 202 has an input terminal, an output terminal, a first sampling terminal, a second sampling terminal, and a ground terminal. The input of charging chip 202 is connected to charging interface 212. The output terminal of the charging chip 202 is connected to the first terminal of the first connector 204, the second terminal of the first connector 204 is connected to the first terminal of the first resistor R1, and the second terminal of the first resistor R1 is connected to the ground terminal of the charging chip 202. The ground terminal of the charging chip 202 is connected to the ground GND. The first sampling end of the charging chip 202 is connected to the first end of the first resistor R1, and the second sampling end of the charging chip 202 is connected to the second end of the first resistor R1 to detect the voltage of the first resistor R1. In some specific embodiments, as shown in fig. 8, the charging circuit 201 may further include an Over Voltage Protection (OVP) device. The OVP device is connected between the charging interface 212 and the input terminal of the charging chip 202. When the voltage of the electric signal input by the charging interface 212 is too large, the OVP device can be automatically disconnected to play a role of overvoltage protection.

As also shown in fig. 8, in this embodiment, the battery protection board 222 includes a protection circuit 2221. The protection circuit 2221 includes a second connector 2222, a second resistor R2, a protection switch Q1, and a protection chip 2224.

Specifically, the second connector 2222 may also be a connection socket, a contact, a port, or the like for connection. The second connector 2222 is for connection with the first connector 204. For example, the second connector 2222 may be connected with the first connector 204 through the third circuit board 250 to achieve connection between the first circuit board 210 and the battery protection plate 222, that is, connection between the output terminal of the charging circuit 201 and the battery protection plate 222. A first end of the second connector 2222 is connected to the first end of the first connector 204 and the positive electrode tab of the battery cell 224, and the negative electrode tab of the battery cell 224 is connected to the first end of the second resistor R2. The second resistor R2 is a sampling resistor. A second end of the second resistor R2 is connected to a first end of the protection switch Q1. A second terminal of the second connector 2222 is connected to a second terminal of the protection switch Q1 and a second terminal of the first connector 204. The protection chip 2224 has a first sampling terminal, a second sampling terminal, and an output terminal. A first sampling end of the protection chip 2224 is connected to a first end of the second resistor R2, a second sampling end of the protection chip 2224 is connected to a second end of the second resistor R2, and an output end of the protection chip 2224 is connected to a control end of the protection switch Q1. In some embodiments, as shown in fig. 8, the protection switch Q1 may be a Metal Oxide Semiconductor (MOS) field effect transistor.

When the battery module 220 of the electronic device 20 is charged, the charging circuit 201 and the protection circuit 2221 operate, and an electrical signal is input from the charging interface 212 and reaches the charging chip 202 through the OVP device. The charging chip 202 performs DC/DC conversion on the electrical signal, and then outputs the electrical signal to the first end of the first connector 204. The electrical signal output from the first end of the first connector 204 is input to the positive tab of the battery cell 224 from the first end of the second connector 2222 via the third circuit board 250, so as to charge the battery cell 224, thereby achieving the purpose of storing energy. The negative electrode tab of the battery cell 224 is connected to the second end of the first connector 204 through the second resistor R2, the turned-on protection switch Q1, and the second end of the second connector 2222. The second terminal of the first connector 204 is connected to the ground GND through the first resistor R1, thereby forming a charging loop. When the charging chip 202 is in operation, the voltage of the first resistor R1 may be detected, and the magnitude of the voltage output from the output terminal of the charging chip 202, that is, the magnitude of the voltage output from the first connector 204, may be adjusted according to the voltage of the first resistor R1. When the protection chip 2224 is operating, the voltage of the second resistor R2 may also be detected, and the current of the electrical signal flowing through the second resistor R2 (i.e., the current of the second resistor R2) may be obtained according to the voltage of the second resistor R2. When the voltage of the second resistor R2 is greater than the preset voltage threshold, or/and the current of the second resistor R2 is greater than the preset current threshold, the protection chip 2224 may control the protection switch Q1 to turn off, so as to stop charging, and prevent the voltage or the current input by the battery cell 224 from being too high.

When the battery module 220 of the electronic device 20 is charged, the electric signal input from the charging interface 212 may also be directly output to the motherboard 230 through the second circuit board 240, so as to supply power to the motherboard 230. In this embodiment, the first end of the first connector 204 may also be connected to the motherboard 230 through the second circuit board 240. In this way, when the battery module 220 of the electronic device 20 discharges, the electrical signal output by the battery cell 224 may sequentially reach the motherboard 230 through the first end of the second connector 2222 on the battery protection board 222, the third circuit board 250, the first end of the first connector 204 on the first circuit board 210, and the second circuit board 240, so as to supply power to the motherboard 230. When the battery module 220 of the electronic device 20 discharges, the protection chip 2224 operates to detect the voltage of the second resistor R2, and obtain the current of the electrical signal flowing through the second resistor R2 (i.e., the current of the second resistor R2) according to the voltage of the second resistor R2. When the voltage of the second resistor R2 is greater than the preset voltage threshold, or/and the current of the second resistor R2 is greater than the preset current threshold, the protection chip 2224 may control the protection switch Q1 to turn off, so as to stop discharging, and prevent the voltage or the current output by the battery cell 224 from being too high.

It is understood that fig. 8 is only one example of a possible implementation manner of the electronic device 20 provided in the embodiment of the present application, in which the "charging circuit 201 is disposed on the first circuit board 210". In some other embodiments, the electronic device 20 may also include a plurality of charging chips 202 and a plurality of third circuit boards 250 in its circuit structure. Cell 224 may also have multiple positive and negative tabs.

For example, fig. 9 to 11 are circuit configuration diagrams of three different electronic devices 20 provided in the embodiment of the present application. As shown in fig. 9 to 11, when the charging circuit 201 is disposed on the first circuit board 210, the charging circuit 201 may include two charging chips and two first connectors.

Specifically, the two charging chips are a first charging chip 202a and a second charging chip 202b, respectively. The two first connectors are a connector A1 and a connector A2, respectively. The first charging chip 202a and the second charging chip 202b are connected in parallel, that is, the input terminal of the first charging chip 202a and the input terminal of the second charging chip 202b are both connected to the charging interface 212. The output terminal of the first charging chip 202a is connected to the first terminal of the connector A1, and the output terminal of the second charging chip 202b is connected to the first terminal of the connector A2. The second end of the connector A1 and the second end of the connector A2 are both connected to the ground GND through the first resistor R1. The ground terminal of the first charging chip 202a and the ground terminal of the second charging chip 202b are both connected to the ground GND. A first sampling end of the first charging chip 202a and a first sampling end of the second charging chip 202b are both connected with a first end of the first resistor R1; the second sampling terminal of the first charging chip 202a and the second sampling terminal of the second charging chip 202b are both connected to the second terminal of the first resistor R1. OVP devices may be respectively connected between the input terminal of the first charging chip 202a, the input terminal of the second charging chip 202b, and the charging interface 212.

In this embodiment, the protection circuit 2221 may also include two second connectors. The two second connectors 2222 are a connector B1 and a connector B2, respectively.

As shown in fig. 9, when cell 224 includes two positive tabs and one negative tab, the first end of connector B1 is connected to the first end of connector A1 and one positive tab of cell 224. A first end of the connector B2 is connected to a first end of the connector A2 and to the other positive tab of the cell 224. The negative electrode tab of the battery cell 224 is still connected to the second end of the connector B1 and the second end of the connector B2 through the second resistor R2 and the protection switch Q1. The second end of the connector B1 is connected to the second end of the connector A1, and the second end of the connector B2 is connected to the second end of the connector A2. A first sampling end of the protection chip 2224 is connected to a first end of the second resistor R2, a second sampling end of the protection chip 2224 is connected to a second end of the second resistor R2, and an output end of the protection chip 2224 is connected to a control end of the protection switch Q1.

When the battery module 220 of the electronic device 20 is charged, the electric signal is input through the charging interface 212 and reaches the first charging chip 202a and the second charging chip 202b through the OVP device, respectively. The first charging chip 202a performs DC/DC conversion on the electrical signal, and then outputs the electrical signal to the first end of the connector A1. The electrical signal output from the first end of the connector A1 may be input from the first end of the connector B1 to one positive tab of the battery cell 224 via the third circuit board 250. The second charging chip 202b outputs the electrical signal to the first end of the connector A2 after DC/DC converting the electrical signal. The electrical signal output by the first end of the connector A2 may be input to the other positive electrode tab of the battery cell 224 from the first end of the connector B2 through the third circuit board 250, so as to charge the battery cell 224, thereby achieving the purpose of energy storage. The first charging chip 202a and the second charging chip 202b may respectively adjust the magnitude of the output voltage according to the voltage of the first resistor R1.

As shown in fig. 10, when cell 224 includes only one positive tab and one negative tab, the first end of connector B1 is connected to the first end of connector A1 and the positive tab of cell 224. A first end of connector B2 is connected to a first end of connector A2, and is also connected to the positive tab of cell 224. The negative electrode tab of the battery cell 224 is still connected to the second end of the connector B1 and the second end of the connector B2 through the second resistor R2 and the protection switch Q1. The second end of the connector B1 is connected to the second end of the connector A1, and the second end of the connector B2 is connected to the second end of the connector A2. A first sampling end of the protection chip 2224 is connected to a first end of the second resistor R2, a second sampling end of the protection chip 2224 is connected to a second end of the second resistor R2, and an output end of the protection chip 2224 is connected to a control end of the protection switch Q1. When the battery module 220 of the electronic device 20 is charged, an electrical signal output from the first end of the connector A1 may be input from the first end of the connector B1 to the positive electrode tab of the electric core 224 through the third circuit board 250; the electrical signal output by the first end of the connector A2 may be input to the positive tab of the battery cell 224 from the first end of the connector B2 through the third circuit board 250, so as to charge the battery cell 224, thereby achieving the purpose of storing energy.

As shown in fig. 11, when there are two battery cells 224, i.e., a first battery cell 2242 and a second battery cell 2244, in the electronic apparatus 20. The first cell 2242 and the second cell 2244 may be connected in series, i.e., the positive tab of the first cell 2242 is connected to the negative tab of the second cell 2244. In this case, the first end of the connector B1 is connected to the first end of the connector A1 and the positive electrode tab of the second cell 2244. The first end of the connector B2 is connected to the first end of the connector A2, and is also connected to the positive tab of the second cell 2244. The negative electrode tab of the first battery cell 2242 is connected to the second end of the connector B1 and the second end of the connector B2 through the second resistor R2 and the protection switch Q1. The second end of the connector B1 is connected to the second end of the connector A1, and the second end of the connector B2 is connected to the second end of the connector A2. A first sampling end of the protection chip 2224 is connected to a first end of the second resistor R2, a second sampling end of the protection chip 2224 is connected to a second end of the second resistor R2, and an output end of the protection chip 2224 is connected to a control end of the protection switch Q1. When the battery module 220 of the electronic device 20 is charged, an electrical signal output from the first end of the connector A1 may be input from the first end of the connector B1 to the positive electrode tab of the second battery cell 2244 through the third circuit board 250; the electrical signal output by the first end of the connector A2 may be input to the positive tab of the second cell 2244 from the first end of the connector B2 via the third circuit board 250, so as to charge the first cell 2242 and the second cell 2244, thereby achieving the purpose of energy storage.

It is understood that, in the embodiments shown in each of fig. 9 to 11, the two third circuit boards 250 may be in the form of one FPC, or may be in the form of two FPCs, which is not limited herein. In addition, in the embodiments shown in fig. 9 to fig. 11, the first end of the connector A2 or/and the first end of the connector A1 may be further connected to the motherboard 230 through the second circuit board 240, so that when the battery module 220 of the electronic device 20 discharges, the electrical signal output by the positive tab of the battery cell 224 may be output to the motherboard 230.

In a second possible implementation manner, the internal structure of the electronic device 20 is as shown in fig. 4, and the charging circuit 201 is disposed on the battery protection board 222, that is, the battery protection board 222 includes the charging circuit 201.

Fig. 12 is a circuit configuration diagram of another electronic device 20 provided in the embodiment of the present application. As shown in fig. 12, when a charging circuit (not shown) is disposed on the battery protection board 222, the charging circuit includes the charging chip 202 and the third resistor R3.

Specifically, the third resistor R3 is a sampling resistor. The charging chip 202 is used for DC/DC conversion of an electrical signal, and may include at least one of a buck circuit, a boost-buck circuit, and a switched capacitor circuit therein. The charging chip 202 has an input terminal, an output terminal, a first sampling terminal, a second sampling terminal, and a ground terminal. The input of charging chip 202 is connected to charging interface 212. In this embodiment, since the charging circuit is disposed on the battery protection board 222, the input terminal of the charging chip 202 can be connected to the charging interface 212 on the first circuit board 210 through the fourth circuit board 260 and the first circuit board 210. The output end of the charging chip 202 is connected to the positive tab of the battery cell 224, the negative tab of the battery cell 224 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the ground end of the charging chip 202. The ground terminal of the charging chip 202 is also connected to the ground GND. The first sampling terminal of the charging chip 202 is connected to the first terminal of the third resistor R3, and the second sampling terminal of the charging chip 202 is connected to the second terminal of the third resistor R3, so as to detect the voltage of the third resistor R3. In some specific embodiments, as shown in fig. 12, the charging circuit may further include an OVP device. The OVP device is connected between the input terminal of the charging chip 202 and the fourth circuit board 260. When the voltage of the electric signal input by the charging interface 212 is too large, the OVP device can be automatically disconnected to play a role of overvoltage protection.

When the battery module 220 of the electronic device 20 is charged, the charging circuit operates, and an electrical signal is input from the charging interface 212 and reaches the charging chip 202 through the first circuit board 210, the fourth circuit board 260 and the OVP device. After the charging chip 202 performs DC/DC conversion on the electrical signal, the electrical signal is output to the positive tab of the electrical core 224, so as to charge the electrical core 224, thereby achieving the purpose of energy storage. The negative electrode tab of the battery cell 224 is connected to the ground GND through the third resistor R3, so as to form a charging loop. When the charging chip 202 operates, the voltage of the third resistor R3 may also be detected, and the magnitude of the voltage output from the output end of the charging chip 202, that is, the magnitude of the voltage input to the positive electrode tab of the electrical core 224, is adjusted according to the voltage of the third resistor R3. In this embodiment, when the battery module 220 of the electronic device 20 is charged, the electrical signal input from the charging interface 212 can also be directly output to the motherboard 230 through the first circuit board 210 and the second circuit board 240, so as to supply power to the motherboard 230. The positive tab of the electric core 224 may be connected to the first circuit board 210 through the fourth circuit board 260, and then connected to the main board 230 through the second circuit board 240. In this way, when the battery module 220 of the electronic device 20 discharges, the electrical signal output by the battery cell 224 may sequentially reach the motherboard 230 through the battery protection board 222, the fourth circuit board 260, the first circuit board 210, and the second circuit board 240, so as to supply power to the motherboard 230.

Further, the battery protection board 222 may further include a protection circuit (not shown). As shown in fig. 13, the protection circuit includes a protection switch Q1, a protection chip 2224, and a third resistor R3.

Specifically, the second end of the third resistor R3 may be connected to the ground terminal of the charging chip 202 through the protection switch Q1. That is, the first terminal of the protection switch Q1 is connected to the second terminal of the third resistor R3, and the second terminal of the protection switch Q1 is connected to the ground terminal of the charging chip 202. The protection chip 2224 has a first sampling terminal, a second sampling terminal, and an output terminal. A first sampling end of the protection chip 2224 is connected to a first end of the third resistor R3, a second sampling end of the protection chip 2224 is connected to a second end of the third resistor R3, and an output end of the protection chip 2224 is connected to a control end of the protection switch Q1. In some specific embodiments, as shown in fig. 13, the protection switch Q1 may be a MOS field effect transistor.

When the charging module of the electronic device 20 is charging, the protection chip 2224 also operates in addition to the charging circuit. When the protection chip 2224 operates, the voltage of the third resistor R3 may be detected, and the current of the electrical signal flowing through the third resistor R3 (i.e., the current of the third resistor R3) may be obtained according to the voltage of the third resistor R3. When the voltage of the third resistor R3 is greater than the preset voltage threshold, or/and the current of the third resistor R3 is greater than the preset current threshold, the protection chip 2224 may control the protection switch Q1 to turn off, so as to stop charging, and prevent the voltage or current input by the battery cell 224 from being too high. When the battery module 220 of the electronic device 20 discharges, the protection chip 2224 operates to detect the voltage of the third resistor R3, and obtain the current of the electrical signal flowing through the third resistor R3 (i.e., the current of the third resistor R3) according to the voltage of the third resistor R3. When the voltage of the third resistor R3 is greater than the preset voltage threshold, or/and the current of the third resistor R3 is greater than the preset current threshold, the protection chip 2224 may control the protection switch Q1 to turn off, so as to stop discharging, and prevent the voltage or the current output by the battery cell 224 from being too high. In this embodiment, the charging circuit and the protection circuit share the third resistor R3 as a sampling resistor. In this way, a resistor can be saved, thereby saving internal space and cost of the electronic device 20.

It is understood that fig. 13 is only one example of possible implementations that "the charging circuit is disposed on the battery protection board 222" in the electronic device 20 provided in the embodiment of the present application. In some other embodiments, a plurality of charging chips 202 may be included in the circuit structure of electronic device 20. Cell 224 may also have multiple positive and negative tabs.

For example, fig. 14 to 16 are circuit configuration diagrams of three different electronic devices 20 provided in the embodiment of the present application. As shown in fig. 14 to 16, when the charging circuit is disposed on the battery protection plate 222, the charging circuit may include two charging chips.

Specifically, the two charging chips are a first charging chip 202a and a second charging chip 202b, respectively. The first charging chip 202a and the second charging chip 202b are connected in parallel, that is, the input end of the first charging chip 202a and the input end of the second charging chip 202b are connected to the charging interface 212 on the first circuit board 210 through the fourth circuit board 260 and the first circuit board 210. The ground terminal of the first charging chip 202a and the ground terminal of the second charging chip 202b are both connected to the ground GND. A first sampling end of the first charging chip 202a and a first sampling end of the second charging chip 202b are both connected with a first end of the third resistor R3; the second sampling terminal of the first charging chip 202a and the second sampling terminal of the second charging chip 202b are both connected to the second terminal of the third resistor R3. OVP devices may be respectively connected between the input terminal of the first charging chip 202a, the input terminal of the second charging chip 202b, and the fourth circuit board 260.

As shown in fig. 14, when the battery cell 224 includes two positive electrode tabs and one negative electrode tab, the output terminal of the first charging chip 202a is connected to one positive electrode tab of the battery cell 224, and the output terminal of the second charging chip 202b is connected to the other positive electrode tab of the battery cell 224. The negative electrode tab of the battery cell 224 is still connected to the ground GND through the third resistor R3 and the protection switch Q1. A first sampling end of the protection chip 2224 is connected to a first end of the third resistor R3, a second sampling end of the protection chip 2224 is connected to a second end of the third resistor R3, and an output end of the protection chip 2224 is connected to a control end of the protection switch Q1.

When the battery module 220 of the electronic device 20 is charged, the electric signal is input from the charging interface 212, and reaches the first charging chip 202a and the second charging chip 202b through the first circuit board 210, the fourth circuit board 260, and the OVP device. After the first charging chip 202a performs DC/DC conversion on the electrical signal, the electrical signal is output to a positive tab of the electrical core 224; after the second charging chip 202b performs DC/DC conversion on the electrical signal, the electrical signal is output to the other positive tab of the electrical core 224, so as to charge the electrical core 224, thereby achieving the purpose of energy storage. The first charging chip 202a and the second charging chip 202b may adjust the magnitude of the output voltage according to the voltage of the third resistor R3, respectively.

As shown in fig. 15, when cell 224 includes only one positive electrode tab and one negative electrode tab, the output terminal of first charge chip 202a and the output terminal of second charge chip 202b may both be connected to the positive electrode tab of cell 224. The negative electrode tab of the battery cell 224 is still connected to the ground GND through the third resistor R3 and the protection switch Q1. A first sampling end of the protection chip 2224 is connected to a first end of the third resistor R3, a second sampling end of the protection chip 2224 is connected to a second end of the third resistor R3, and an output end of the protection chip 2224 is connected to a control end of the protection switch Q1. When the battery module 220 of the electronic device 20 is charged, the electrical signal output by the first charging chip 202a and the electrical signal output by the second charging chip 202b can be input to the positive tab of the electric core 224, so as to charge the electric core 224, thereby achieving the purpose of energy storage.

As shown in fig. 16, when there are two battery cells 224, i.e., a first battery cell 2242 and a second battery cell 2244, in the electronic apparatus 20. The first cell 2242 and the second cell 2244 may be connected in series, i.e., the positive tab of the first cell 2242 is connected to the negative tab of the second cell 2244. In this case, the output terminal of the first charging chip 202a and the output terminal of the second charging chip 202b may both be connected to the positive tab of the second cell 2244. The negative electrode tab of the first battery cell 2242 is connected with a ground wire GND through a third resistor R3 and a protection switch Q1. A first sampling end of the protection chip 2224 is connected to a first end of the third resistor R3, a second sampling end of the protection chip 2224 is connected to a second end of the third resistor R3, and an output end of the protection chip 2224 is connected to a control end of the protection switch Q1. When the battery module 220 of the electronic device 20 is charged, the electric signal output by the first charging chip 202a and the electric signal output by the second charging chip 202b can be input into the positive electrode ear of the second battery cell 2244, so that the first battery cell 2242 and the second battery cell 2244 are charged, and the energy storage purpose is achieved.

Fig. 17 is a circuit configuration diagram of another electronic device 20 provided in the embodiment of the present application. As shown in fig. 17, the battery protection board 222 may further have an electricity meter 270 integrated therein. A first end of the fuel gauge 270 is connected to the positive tab of the cell 224, a second end of the fuel gauge 270 is connected to the negative tab of the cell 224 and a first end of the third resistor R3, and a third end of the fuel gauge 270 is connected to a second end of the third resistor R3. When the electricity meter 270 operates, the voltage of the battery cell 224 and the voltage of the third resistor R3 may be detected, and the electric quantity of the battery cell 224 may be determined according to the voltage of the battery cell 224 and the voltage of the third resistor R3. In this embodiment, the charging circuit and the fuel gauge 270 are integrated into the battery protection board 222. Therefore, at the stage of the battery protection board 222, namely, the battery protection board 222 and the battery core 224 are assembled to form the battery module 220, the electricity meter 270 can be calibrated, so that the calibration of the electricity meter 270 can be facilitated. In addition, since the charging circuit is integrated in the battery protection board 222, different battery protection boards 222 and different battery cores 224 are combined to obtain the battery modules 220 with different powers and capacities, which is beneficial to power normalization of the battery protection board 222 and can improve reusability of the battery protection board 222. In this embodiment, the battery protection board 222 may be a system in a package (SIP), so that the heat spreader 207 may be disposed between the battery protection board 222 and the metal middle frame 203 and between the battery protection board 222 and the rear cover 205 in the electronic device 20, thereby facilitating sufficient heat dissipation.

It is understood that, in the embodiments illustrated in each of fig. 12 to 17, two first circuit boards 210 and two fourth circuit boards 260 are illustrated for the convenience of understanding the charging path and the discharging path of the battery module 220 of the electronic device 20. Indeed, in the embodiment shown in each of fig. 12 to 17, the two first circuit boards 210 may be in the form of one PCB; the two fourth circuit boards 260 may be in the form of one FPC or two FPCs, which is not limited herein.

In summary, the electronic device 20 provided in the embodiment of the present application has at least the following advantages:

for the embodiment in which the charging circuit 201 is disposed on the first circuit board 210, 1, the charging circuit 201 that easily generates heat and the SOC are disposed at different positions of the electronic device 20. In this way, the heat generated by the electronic device 20 can be dispersed, so that the heat dissipation capability of the electronic device 20 is improved, and the use experience of the electronic device 20 is improved. Meanwhile, when the electronic device 20 is in a heavy-load scene, the charging speed is not reduced in order to reduce heat generation. 2. The battery protection plate 222 in the battery module 220 is disposed near the charging interface 212, so that the positive tab and the negative tab of the battery cell 224 are located near the charging interface 212. In this way, when the battery module 220 of the electronic device 20 is charged, the transmission path of the electrical signal can be shortened, so as to reduce the power consumption, and the influence of the charging current on the normal operation of the compass and other devices, i.e. the current interference, can also be reduced. The charging circuit 201 is disposed on the first circuit board 210 or the battery protection board 222, so as to improve the utilization rate of the main board 230.

With regard to the arrangement in which the charging circuit 201 is provided to the battery protection board 222, 1, the charging circuit 201 that easily generates heat and the SOC are provided at different positions of the electronic device 20. In this way, the heat generated by the electronic device 20 can be dispersed, so that the heat dissipation capability of the electronic device 20 is improved, and the use experience of the electronic device 20 is improved. Meanwhile, when the electronic device 20 is in a heavy-load scene, the charging speed is not reduced in order to reduce heat generation. 2. The battery protection plate 222 in the battery module 220 is disposed near the charging interface 212, so that the positive tab and the negative tab of the battery cell 224 are located near the charging interface 212. Thus, when the battery module 220 of the electronic device 20 is charged, the transmission path of the electrical signal can be shortened, so as to reduce the power consumption, and the influence of the charging current on the normal operation of the devices such as the compass can be reduced, i.e., the current interference can be reduced. The charging circuit 201 is disposed on the first circuit board 210 or the battery protection board 222, so as to improve the utilization rate of the main board 230. 3. The fourth circuit board 260 has a smaller width and thickness than the third circuit board 250. Thus, on the one hand, bending of the fourth circuit board 260 is facilitated; on the other hand, the space occupied by the fourth circuit board 260 is smaller, and the saved space can be used for increasing the volume of the battery cell 224, so that the capacity of the battery cell 224 for storing electric energy is increased; in yet another aspect, heat generation and charge loss may be reduced. 4. The charging circuit 201 and the protection circuit 2221 share the third resistor R3 as a sampling resistor. In this way, a resistor can be saved, thereby saving internal space and cost of the electronic device 20. 5. The charging circuit 201 and the fuel gauge 270 are integrated in the battery protection board 222. Therefore, at the stage of the battery protection board 222, namely, the battery protection board 222 and the battery core 224 are assembled to form the battery module 220, the electricity meter 270 can be calibrated, so that the calibration of the electricity meter 270 can be facilitated. In addition, because the charging circuit 201 is integrated in the battery protection board 222, different battery protection boards 222 and different battery cores 224 are combined to obtain the battery modules 220 with different powers and capacities, which is beneficial to power normalization of the battery protection boards 222 and can improve reusability of the battery protection boards 222. 6. The battery protection board 222 may be packaged in an SIP manner, so that the soaking material 207 may be disposed between the battery protection board 222 and the metal middle frame 203 and between the battery protection board 222 and the rear cover 205 in the electronic device 20, thereby facilitating sufficient heat dissipation.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. An electronic device, comprising: the battery module comprises a first circuit board, a battery module, a mainboard and a second circuit board;

the first circuit board is provided with a charging interface;

the battery module comprises a battery protection board and a battery cell connected with the battery protection board, the battery protection board is positioned between the first circuit board and the battery cell, and the battery cell is positioned between the battery protection board and the mainboard;

the second circuit board is connected between the first circuit board and the mainboard;

the first circuit board or the battery protection board comprises a charging circuit, and the charging circuit is connected between the charging interface and the battery core so as to charge the battery core through the charging interface and the charging circuit;

the charging circuit comprises a charging chip and a sampling resistor, wherein the input end of the charging chip is connected with the charging interface, the output end of the charging chip is connected with the positive electrode lug of the battery cell, the first end of the sampling resistor is connected with the negative electrode lug of the battery cell, and the second end of the sampling resistor is connected with the grounding end of the charging chip;

the first sampling end of the charging chip is connected with the first end of the sampling resistor, and the second sampling end of the charging chip is connected with the second end of the sampling resistor so as to detect the voltage of the sampling resistor; the charging chip is used for adjusting the output voltage of the output end of the charging chip according to the voltage of the sampling resistor.

2. The electronic device of claim 1, wherein the first circuit board includes the charging circuit, the sampling resistor is a first resistor, the charging circuit further includes a first connector;

the output end of the charging chip is connected with the first end of the first connector, the first end of the first connector is connected with the positive lug of the battery cell, the second end of the first connector is connected with the negative lug of the battery cell and the first end of the first resistor, and the second end of the first resistor is connected with the grounding end of the charging chip;

a first sampling end of the charging chip is connected with a first end of the first resistor, and a second sampling end of the charging chip is connected with a second end of the first resistor so as to detect the voltage of the first resistor; the charging chip is used for adjusting the output voltage of the output end of the charging chip according to the voltage of the first resistor.

3. The electronic device of claim 2, wherein the battery protection board includes a protection circuit including a second connector, a second resistor, a protection switch, and a protection chip;

the first end of the second connector is connected with the first end of the first connector and the positive lug of the battery cell;

the negative pole lug of the battery cell is connected with the first end of the second resistor, and the second end of the second resistor is connected with the first end of the protection switch;

the second end of the second connector is connected with the second end of the protection switch and the second end of the first connector;

the first sampling end of the protection chip is connected with the first end of the second resistor, the second sampling end of the protection chip is connected with the second end of the second resistor, the output end of the protection chip is connected with the control end of the protection switch, the protection chip is used for detecting the voltage of the second resistor and controlling the on and off of the protection switch according to the voltage of the second resistor.

4. The electronic device of claim 2, wherein the electronic device further comprises: a third circuit board; the third circuit board is connected between the first circuit board and the battery protection board.

5. The electronic device of claim 1, wherein the battery protection board includes the charging circuit, the sampling resistor is a third resistor;

the negative electrode tab of the battery cell is connected with the first end of the third resistor, and the second end of the third resistor is connected with the grounding end of the charging chip;

the first sampling end of the charging chip is connected with the first end of the third resistor, and the second sampling end of the charging chip is connected with the second end of the third resistor so as to detect the voltage of the third resistor; the charging chip is used for adjusting the output voltage of the output end of the charging chip according to the voltage of the third resistor.

6. The electronic device of claim 5, wherein the battery protection board further comprises: a protection switch and a protection chip;

the first end of the protection switch is connected with the second end of the third resistor, and the second end of the protection switch is connected with the grounding end of the charging chip;

the protection chip's first sample end with the first end of third resistance is connected, the protection chip's second sample end with the second end of third resistance is connected, the protection chip's output with protection switch's control end is connected, the protection chip is used for detecting the voltage of third resistance, and the basis voltage control of third resistance protection switch's switching on and turn-off.

7. The electronic device of claim 5, wherein the battery protection board further comprises: an electricity meter; the first end of the electricity meter is connected with the positive tab of the battery cell, the second end of the electricity meter is connected with the negative tab of the battery cell and the first end of the third resistor, and the third end of the electricity meter is connected with the second end of the third resistor; the electricity meter is used for detecting the voltage of the battery cell and the voltage of the third resistor, and determining the electric quantity of the battery cell according to the voltage of the battery cell and the voltage of the third resistor.

8. The electronic device of claim 5, wherein the electronic device further comprises: a fourth circuit board; the fourth circuit board is connected between the first circuit board and the battery protection board.

9. The electronic device of any of claims 1-8, further comprising: a metal middle frame and a rear cover;

the first circuit board, the battery module and the mainboard are arranged along a first direction;

in a second direction perpendicular to the first direction, the first circuit board, the battery module and the main board are all clamped between the metal middle frame and the rear cover.

10. The electronic device of claim 9, wherein the electronic device further comprises: and the heat soaking material is positioned between at least one of the first circuit board and the mainboard and at least one of the metal middle frame and the rear cover.