Battery protection board, battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and provides a battery protection board, a battery and electric equipment. The battery protection board comprises a substrate, a field effect transistor group, a first temperature sensor and a second temperature sensor. The field effect transistor group is arranged on the substrate. The field-effect tube group comprises a charging field-effect tube and a discharging field-effect tube, the first temperature sensor is arranged at the charging field-effect tube and used for collecting the temperature of the charging field-effect tube, and the second temperature sensor is arranged at the discharging field-effect tube and used for collecting the temperature of the discharging field-effect tube. Therefore, the limitation on the relative positions of the charging field-effect tube and the discharging field-effect tube is small, and the arrangement of the charging field-effect tube and the discharging field-effect tube is flexible.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery protection board, a battery, and an electrical device. Background Art

[0002] A battery is a power storage and supply device. A battery may include a battery cell and a battery protection board. The battery protection board may include a charging field effect transistor and a discharging field effect transistor. The charging field effect transistor and the discharging field effect transistor are electrically connected to the battery cell, and can control the charging and discharging of the battery cell.

[0003] In the related art, the battery protection board further includes a temperature sensor disposed between the charging field effect transistor and the discharging field effect transistor. The temperature sensor is used to collect the temperatures of the charging field effect transistor and the discharging field effect transistor to monitor the temperatures of the charging field effect transistor and the discharging field effect transistor.

[0004] However, in the related art, the relative positions of the charging field effect transistor and the discharging field effect transistor are subject to greater restrictions, and the arrangement of the charging field effect transistor and the discharging field effect transistor is not flexible enough. Summary of the Utility Model

[0005] This application provides a battery protection board, a battery, and an electrical device, with less restrictions on the relative positions of the charging field effect transistor and the discharging field effect transistor, and the arrangement of the charging field effect transistor and the discharging field effect transistor can be more flexible.

[0006] In a first aspect of this application, a battery protection board is provided. The battery protection board includes a substrate, a field effect transistor group, a first temperature sensor, and a second temperature sensor. The field effect transistor group is disposed on the substrate. The field effect transistor group includes a charging field effect transistor and a discharging field effect transistor. The first temperature sensor is disposed at the charging field effect transistor, and the first temperature sensor is used to collect the temperature of the charging field effect transistor. The second temperature sensor is disposed at the discharging field effect transistor, and the second temperature sensor is used to collect the temperature of the discharging field effect transistor.

[0007] For the battery protection board provided in this application, the temperatures of the charging field effect transistor and the discharging field effect transistor are monitored by the first temperature sensor and the second temperature sensor respectively, reducing the requirements for the relative positions of the charging field effect transistor and the discharging field effect transistor. The charging field effect transistor and the discharging field effect transistor can be arranged more flexibly, and the arrangement difficulty of the devices on the substrate can be reduced.

[0008] In a possible implementation manner, the substrate includes a first region and a second region, and the first region and the second region are spaced apart in a first direction. The charging field effect transistor and the first temperature sensor are disposed in the first region, and the discharging field effect transistor and the second temperature sensor are disposed in the second region.

[0009] In a possible implementation, multiple groups of field effect transistor groups connected in parallel are provided on a substrate. The charging field effect transistors of each group of field effect transistor groups are all arranged in a first region, and the discharging field effect transistors of each group of field effect transistor groups are all arranged in a second region.

[0010] In a possible implementation, all the charging field effect transistors are arranged in a straight line along a first direction, and all the discharging field effect transistors are arranged in a straight line along the first direction.

[0011] In a possible implementation, the charging field effect transistors and the discharging field effect transistors are arranged in a straight line along a first direction.

[0012] In a possible implementation, the first region includes a first side and a second side opposite to each other along a second direction, and both the first side and the second side extend along the first direction. The distance between one end of the first temperature sensor close to the first side and the first side is greater than the distance between one end of the charging field effect transistor close to the first side and the first side, or the distance between one end of the first temperature sensor close to the second side and the second side is greater than the distance between one end of the charging field effect transistor close to the second side and the second side.

[0013] The second region includes a third side and a fourth side opposite to each other along the second direction, and both the third side and the fourth side extend along the first direction. The distance between one end of the second temperature sensor close to the third side and the third side is greater than the distance between one end of the discharging field effect transistor close to the third side and the third side, or the distance between one end of the second temperature sensor close to the fourth side and the fourth side is greater than the distance between one end of the discharging field effect transistor close to the fourth side and the fourth side. Wherein, the first direction is perpendicular to the second direction.

[0014] In a possible implementation, charging field effect transistors are provided on both sides of the first temperature sensor in the first direction.

[0015] In a possible implementation, discharging field effect transistors are provided on both sides of the second temperature sensor in the first direction.

[0016] In a possible implementation, the size of the first temperature sensor in the second direction is greater than or equal to the size of the first temperature sensor in the first direction. The size of the second temperature sensor in the second direction is greater than or equal to the size of the second temperature sensor in the first direction.

[0017] In a possible implementation, the first region includes a first side and a second side opposite to each other along a second direction, and the first side and the second side extend along a first direction. The distance between one end of the first temperature sensor away from the first side and the first side is less than the distance between one end of the charging field effect transistor close to the first side and the first side, or the distance between one end of the first temperature sensor away from the second side and the second side is less than the distance between one end of the charging field effect transistor close to the second side and the second side.

[0018] The second region includes a third side and a fourth side opposite to each other along the second direction, and both the third side and the fourth side extend along the first direction. The distance between one end of the second temperature sensor away from the third side and the third side is less than the distance between one end of the discharging field effect transistor close to the third side and the third side, or the distance between one end of the second temperature sensor away from the fourth side and the fourth side is less than the distance between one end of the discharging field effect transistor close to the fourth side and the fourth side.

[0019] In a possible implementation, the size of the first temperature sensor in the first direction is greater than or equal to the size of the first temperature sensor in the second direction. The size of the second temperature sensor in the first direction is greater than or equal to the size of the second temperature sensor in the second direction.

[0020] In a possible implementation, the size of the charging field effect transistor in the second direction is greater than or equal to the size of the charging field effect transistor in the first direction. The size of the discharging field effect transistor in the second direction is greater than or equal to the size of the discharging field effect transistor in the first direction. The first direction is the length direction of the substrate.

[0021] In a possible implementation, the first region includes a fifth side, the fifth side is located on one side of the first region in the first direction, and the fifth side extends along the second direction. All the charging field effect transistors are arranged in a straight line along the second direction, the size of the charging field effect transistor in the first direction is greater than or equal to the size of the charging field effect transistor in the second direction, and the distance between one end of the first temperature sensor close to the fifth side and the fifth side is greater than the distance between one end of the charging field effect transistor away from the fifth side and the fifth side.

[0022] The second region includes a sixth side, the sixth side is located on one side of the second region in the first direction, and the sixth side extends along the second direction. All the discharging field effect transistors are arranged in a straight line along the second direction, the size of the discharging field effect transistor in the first direction is greater than or equal to the size of the discharging field effect transistor in the second direction, and the distance between one end of the second temperature sensor close to the sixth side and the sixth side is greater than the distance between one end of the discharging field effect transistor away from the sixth side and the sixth side.

[0023] In a possible implementation, the distance between the first temperature sensor and the charging field effect transistor is less than the distance between the first temperature sensor and the discharging field effect transistor. The distance between the second temperature sensor and the discharging field effect transistor is less than the distance between the second temperature sensor and the charging field effect transistor.

[0024] In a possible implementation, components are arranged between the charging field effect transistor and the discharging field effect transistor, and the components arranged between the charging field effect transistor and the discharging field effect transistor are non-heating components.

[0025] In a possible implementation, the battery protection board further includes a processor, the processor is arranged on the substrate, and both the first temperature sensor and the second temperature sensor are electrically connected to the processor.

[0026] The second aspect of the present application provides a battery, and the battery includes the battery protection board in any of the above embodiments.

[0027] The third aspect of the present application provides an electrical device, and the electrical device includes the battery protection board in any of the above embodiments or the battery in any of the above embodiments. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic diagram of the electrical connection of an electrical device provided by an embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of the electrical connection of another electrical device provided by an embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of a battery protection board provided by an embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of the electrical connection at the first temperature sensor and the second temperature sensor of a battery protection board provided by an embodiment of the present application;

[0033] Figure 5 It is a schematic diagram of another battery protection board provided by an embodiment of the present application;

[0034] Figure 6 It is a schematic diagram of another battery protection board provided by an embodiment of the present application;

[0035] Figure 7 Schematic diagram of a first area of a battery protection board provided by an embodiment of the present application;

[0036] Figure 8 Schematic diagram of a second area of a battery protection board provided by an embodiment of the present application;

[0037] Figure 9 Schematic diagram of another battery protection board provided by an embodiment of the present application;

[0038] Figure 10 Schematic diagram of a first area of another battery protection board provided by an embodiment of the present application;

[0039] Figure 11 Schematic diagram of a second area of another battery protection board provided by an embodiment of the present application.

[0040] Explanation of reference numerals:

[0041] 1, Electrical equipment;

[0042] 10, Battery; 11, Battery cell; 12, Battery protection board; 20, Load; 30, Charging connector;

[0043] 100, Substrate; 110, First area; 111, First side; 112, Second side; 120, Second area; 121, Third side; 122, Fourth side;

[0044] 200, Field effect transistor group; 200a, First field effect transistor group; 200b, Second field effect transistor group; 210, Charging field effect transistor; 210a, First charging field effect transistor; 210b, Second charging field effect transistor; 220, Discharging field effect transistor; 220a, First discharging field effect transistor; 220b, Second discharging field effect transistor;

[0045] 300, First temperature sensor;

[0046] 400, Second temperature sensor;

[0047] 500, Processor;

[0048] 600, Circuit breaker;

[0049] x, First direction; y, Second direction. Detailed implementation manners

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, or the internal connection or interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0053] The terms "first", "second", "third" (if any) in the description, claims, and accompanying drawings of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described herein can be implemented in an order different from those illustrated or described herein.

[0054] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or maintenance tool that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or maintenance tools.

[0055] Figure 1 It is a schematic diagram of the electrical connection of an electrical device provided for the embodiments of this application.

[0056] As Figure 1As shown in the figure, an embodiment of the present application provides an electrical device 1, which includes a battery 10, a load 20, and a charging connector 30. The battery 10 is a rechargeable battery. The battery 10 is electrically connected to the load 20. The battery 10 can be used to store electrical energy and supply power to the load 20. The battery 10 is also electrically connected to the charging connector 30. The charging connector 30 is used to connect to an external power supply device so that the external power supply device can charge the battery 10 through the charging connector 30.

[0057] Exemplarily, the electrical device 1 may include, but is not limited to, rechargeable transportation means, rechargeable transport vehicles, rechargeable household appliances, rechargeable portable mobile terminals, etc.

[0058] For example, the electrical device 1 may include, but is not limited to, vehicles, ships, aircraft, stereos, floor-sweeping robots, mobile phones, tablet computers, laptop computers, e-readers, wearable devices, etc.

[0059] Exemplarily, the battery 10 may include, but is not limited to, lithium-ion batteries, lithium-metal batteries, lithium-polymer batteries, lead-acid batteries, nickel-metal hydride batteries, nickel-manganese-cobalt batteries, lithium-sulfur batteries, lithium-air batteries, nickel-hydrogen batteries, lithium-ion batteries, iron batteries, nano-batteries, etc.

[0060] Figure 2 It is a schematic diagram of the electrical connection of another electrical device provided by the embodiment of the present application.

[0061] As Figure 2 shown, the battery 10 includes a housing (not shown), a battery protection board 12, and a battery cell 11. The battery cell 11 is disposed inside the housing. The battery cell 11 is used for storing and supplying electricity. The housing can play a role in protecting the battery cell 11. The battery protection board 12 may be disposed on the housing. The battery protection board 12 is located between the battery cell 11 and the housing. The battery protection board 12 is electrically connected to the battery cell 11. The battery protection board 12 is also electrically connected to the load 20 and the charging connector 30.

[0062] The battery protection board 12 includes a field-effect transistor group 200. The field-effect transistor group 200 is electrically connected to the battery cell 11. The field-effect transistor group 200 is also electrically connected to the load 20 and the charging connector 30. That is to say, the load 20 and the charging connector 30 are electrically connected to the battery cell 11 through the field-effect transistor group 200. The field-effect transistor group 200 is used to control the charging and discharging of the battery cell 11.

[0063] The field effect transistor group 200 includes a charging field effect transistor 210 and a discharging field effect transistor 220. The load 20 and the charging connector 30 are electrically connected to the charging field effect transistor 210 and the discharging field effect transistor 220. The charging field effect transistor 210 and the discharging field effect transistor 220 are electrically connected to the battery cell 11. That is to say, the load 20 and the charging connector 30 are electrically connected to the battery cell 11 through the charging field effect transistor 210 and the discharging field effect transistor 220. The charging field effect transistor 210 and the discharging field effect transistor 220 are used to control the charging and discharging of the battery cell 11.

[0064] Exemplarily, the source electrode of the discharging field effect transistor 220 is connected to the load 20 and the charging connector 30. The drain electrode of the discharging field effect transistor 220 is connected to the drain electrode of the charging field effect transistor 210. The source electrode of the charging field effect transistor 210 is connected to the battery cell 11. The gate electrode of the charging field effect transistor 210 and the gate electrode of the discharging field effect transistor 220 are electrically connected to the control terminals of the controller. The charging field effect transistor 210 is connected to the charging connector 30 and the load 20 through the discharging field effect transistor 220. The discharging field effect transistor 220 is connected to the battery cell 11 through the charging field effect transistor 210.

[0065] Exemplarily, both the charging field effect transistor 210 and the discharging field effect transistor 220 can be metal-oxide semiconductor field effect transistors (MOS-FETs).

[0066] The battery protection board 12 further includes a substrate 100 (as shown below Figure 3 ), and the field effect transistor group 200 is disposed on the substrate 100. That is to say, both the charging field effect transistor 210 and the discharging field effect transistor 220 are disposed on the substrate 100, and the substrate 100 is disposed on the housing.

[0067] Exemplarily, the substrate 100 can be a rigid circuit board or a flexible circuit board.

[0068] In some examples, the battery protection board 12 can further include a circuit breaker 600. The circuit breaker 600 can be disposed on the substrate 100, and the field effect transistor group 200 can be electrically connected to the battery cell 11 through the circuit breaker 600.

[0069] Exemplarily, the source electrode of the charging field effect transistor 210 can be electrically connected to one end of the circuit breaker 600, and the battery cell 11 is electrically connected to the other end of the circuit breaker 600.

[0070] In some examples, the battery protection board 12 can further include a processor 500. The processor 500 can be disposed on the substrate 100.

[0071] Exemplarily, the controller electrically connected to the gates of the charging field-effect transistor 210 and the discharging field-effect transistor 220 can be the processor 500 of the battery protection board 12. That is to say, the gates of the charging field-effect transistor 210 and the discharging field-effect transistor 220 are electrically connected to the control terminals of the processor 500 of the battery protection board 12.

[0072] In the related art, the battery protection board further includes a temperature sensor disposed between the charging field-effect transistor and the discharging field-effect transistor. The temperature sensor is used to collect the temperatures of the charging field-effect transistor and the discharging field-effect transistor to monitor the temperatures of the charging field-effect transistor and the discharging field-effect transistor.

[0073] However, in the related art, to monitor the temperatures of the charging field-effect transistor and the discharging field-effect transistor through one temperature sensor, the charging field-effect transistor and the discharging field-effect transistor need to be centrally arranged. That is to say, the charging field-effect transistor and the discharging field-effect transistor need to be arranged at positions with a small distance. This places great restrictions on the relative positions of the charging field-effect transistor and the discharging field-effect transistor. The arrangement of the charging field-effect transistor and the discharging field-effect transistor is not flexible enough, which will increase the difficulty of arranging devices on the substrate.

[0074] Figure 3 The figure is a schematic diagram of a battery protection board provided by an embodiment of the present application. Among them, the x direction is the first direction, and the y direction is the second direction. The first direction is perpendicular to the second direction. For example, the first direction can be the length direction of the substrate 100. At this time, the second direction is the width direction of the substrate 100. Another example is that the first direction can be the width direction of the substrate 100. At this time, the second direction is the length direction of the substrate 100.

[0075] As Figure 3 shown, based on this, in the embodiment of the present application, the battery protection board 12 further includes a first temperature sensor 300 and a second temperature sensor 400. The first temperature sensor 300 is disposed at the charging field-effect transistor 210. The first temperature sensor 300 is used to collect the temperature of the charging field-effect transistor 210 to monitor the temperature of the charging field-effect transistor 210. The second temperature sensor 400 is disposed at the discharging field-effect transistor 220. The second temperature sensor 400 is used to collect the temperature of the discharging field-effect transistor 220 to monitor the temperature of the discharging field-effect transistor 220.

[0076] In this way, the temperatures of the charging field-effect transistor 210 and the discharging field-effect transistor 220 are monitored through the first temperature sensor 300 and the second temperature sensor 400 respectively, reducing the requirements for the relative positions of the charging field-effect transistor 210 and the discharging field-effect transistor 220. The charging field-effect transistor 210 and the discharging field-effect transistor 220 can be arranged more flexibly, which can reduce the difficulty of arranging devices on the substrate 100.

[0077] In the embodiments of the present application, the temperature of the charging field effect transistor 210 and the temperature of the discharging field effect transistor 220 are monitored by a first temperature sensor 300 and a second temperature sensor 400 respectively, and there may be a relatively large distance between the charging field effect transistor 210 and the discharging field effect transistor 220. By arranging the charging field effect transistor 210 and the discharging field effect transistor 220 separately to increase the distance between the charging field effect transistor 210 and the discharging field effect transistor 220, the mutual influence of the thermal radiation when the charging field effect transistor 210 and the discharging field effect transistor 220 work can be reduced, and thus the temperatures of the charging field effect transistor 210 and the discharging field effect transistor 220 can be lowered. After the temperatures of the charging field effect transistor 210 and the discharging field effect transistor 220 are lowered, the requirements for the type selection of the charging field effect transistor 210 and the discharging field effect transistor 220 can be reduced, which is beneficial to reducing the costs of the charging field effect transistor 210 and the discharging field effect transistor 220.

[0078] In some possible implementation manners, the distance between the first temperature sensor 300 and the charging field effect transistor 210 is less than the distance between the first temperature sensor 300 and the discharging field effect transistor 220. The distance between the second temperature sensor 400 and the discharging field effect transistor 220 is less than the distance between the second temperature sensor 400 and the charging field effect transistor 210.

[0079] In this way, it is convenient to implement the monitoring of the temperature of the charging field effect transistor 210 by the first temperature sensor 300 and the monitoring of the temperature of the discharging field effect transistor 220 by the second temperature sensor 400. The detection result of the first temperature sensor 300 is less affected by the discharging field effect transistor 220, and the detection result of the second temperature sensor 400 is less affected by the charging field effect transistor 210.

[0080] In some possible implementation manners, components are arranged between the charging field effect transistor 210 and the discharging field effect transistor 220, and the components arranged between the charging field effect transistor 210 and the discharging field effect transistor 220 are non-heating components.

[0081] In this way, components are arranged between the charging field effect transistor 210 and the discharging field effect transistor 220, and the arranged components have little influence on the temperatures of the charging field effect transistor 210 and the discharging field effect transistor 220, so that the charging field effect transistor 210 and the discharging field effect transistor 220 are not likely to have overheating problems, the requirements for the type selection of the charging field effect transistor 210 and the discharging field effect transistor 220 can be reduced, and it is beneficial to reducing the costs of the charging field effect transistor 210 and the discharging field effect transistor 220.

[0082] The non-heating components refer to the components that do not generate heat or generate insufficient heat to affect the temperatures of the charging field effect transistor 210 and the discharging field effect transistor 220 when the battery protection board works.

[0083] Exemplarily, the substrate 100 includes a first region 110 and a second region 120. The first region 110 and the second region 120 are spaced apart. The charging field effect transistor 210 and the first temperature sensor 300 are disposed in the first region 110, and the discharging field effect transistor 220 and the second temperature sensor 400 are disposed in the second region 120.

[0084] In some possible implementation manners, the first region 110 and the second region 120 are spaced apart in a first direction.

[0085] In this way, when there is sufficient space for arranging devices in the first direction, the first region 110 and the second region 120 can be set by using the size of the substrate 100 in the first direction, which is beneficial to reducing the size of the substrate 100 in the second direction. After the size of the substrate 100 in the second direction is reduced, it is beneficial to increase the size of the battery cell 11, and further the energy density of the battery 10 can be improved. In addition, the cost of the substrate 100 with a smaller size in the second direction is also lower.

[0086] In some possible implementation manners, components are disposed between the first region 110 and the second region 120, and the components disposed between the first region 110 and the second region 120 are non-heating components.

[0087] Figure 4 This is a schematic diagram of the electrical connection at the first temperature sensor and the second temperature sensor of a battery protection board provided by an embodiment of the present application.

[0088] In some possible implementation manners, both the first temperature sensor 300 and the second temperature sensor 400 are electrically connected to the processor 500 of the battery protection board 12.

[0089] In this way, it is convenient to control the battery protection board 12 according to the temperatures collected by the first temperature sensor 300 and the second temperature sensor 400.

[0090] Exemplarily, when the temperature collected by the first temperature sensor 300 is higher than a first threshold or when the temperature collected by the second temperature sensor 400 is higher than a second threshold, the protection mechanism of the battery protection board 12 can be triggered to ensure the safe and stable operation of the battery 10.

[0091] The processor 500 can be used to form corresponding control instructions according to the temperature collected by the first temperature sensor 300 and the first threshold, and the temperature collected by the second temperature sensor 400 and the second threshold. Specifically, the processor 500 can be used to form a control instruction for triggering the protection mechanism of the battery protection board 12 when the temperature collected by the first temperature sensor 300 is higher than the first threshold or when the temperature collected by the second temperature sensor 400 is higher than the second threshold.

[0092] Exemplarily, the processor 500 has a first signal terminal. The first temperature sensor 300 can be a thermistor. One end of the first temperature sensor 300 is grounded, and the other end of the first temperature sensor 300 is electrically connected to the first signal terminal of the processor 500.

[0093] Exemplarily, the first signal terminal can be an analog signal terminal for transmitting analog signals.

[0094] Exemplarily, the processor 500 has a second signal terminal. The second temperature sensor 400 can be a thermistor. One end of the second temperature sensor 400 is grounded, and the other end of the second temperature sensor 400 is electrically connected to the second signal terminal of the processor 500.

[0095] Exemplarily, the second signal terminal can be an analog signal terminal for transmitting analog signals.

[0096] Exemplarily, the first temperature sensor 300 and the second temperature sensor 400 can be disposed on the substrate 100, such that the first temperature sensor 300 and the second temperature sensor 400 are disposed and electrically connected to the processor 500 more conveniently.

[0097] Figure 5 It is a schematic diagram of another battery protection board provided by an embodiment of the present application.

[0098] As Figure 5 shown, in some possible implementation manners, a plurality of groups of field effect transistor groups 200 connected in parallel are provided on the substrate 100. The charging field effect transistors 210 of each group of field effect transistor groups 200 are all disposed in the first region 110, and the discharging field effect transistors 220 of each group of field effect transistor groups 200 are all disposed in the second region 120.

[0099] In this way, the plurality of groups of field effect transistor groups 200 connected in parallel are beneficial to meeting the requirements of charging and discharging of the battery 10 with a relatively high power. In addition, the charging field effect transistors 210 of each group of field effect transistor groups 200 are all disposed in the first region 110, so that all the charging field effect transistors 210 are relatively concentrated, which is beneficial for the first temperature sensor 300 to monitor the temperatures of all the charging field effect transistors 210. The discharging field effect transistors 220 of each group of field effect transistor groups 200 are all disposed in the second region 120, so that all the discharging field effect transistors 220 are relatively concentrated, which is beneficial for the second temperature sensor 400 to monitor the temperatures of all the discharging field effect transistors 220. In addition, the heat radiation generated by each charging field effect transistor 210 is not likely to affect all the discharging field effect transistors 220, and the heat radiation generated by each discharging field effect transistor 220 is not likely to affect all the charging field effect transistors 210.

[0100] Exemplarily, one end of each group of field effect transistor groups 200 is electrically connected to the load 20 and the charging connector 30. For example, the source electrodes of the discharge field effect transistors 220 of each group of field effect transistor groups 200 are electrically connected to the load 20 and the charging connector 30. The other end of each group of field effect transistor groups 200 is electrically connected to the battery cell 11 through a circuit breaker 600. For example, the source electrodes of the charging field effect transistors 210 of each group of field effect transistor groups 200 are electrically connected to the battery cell 11 through a circuit breaker 600.

[0101] Exemplarily, referring to Figure 5 As shown, multiple groups of field effect transistor groups 200 may include a first field effect transistor group 200a and a second field effect transistor group 200b. The first field effect transistor group 200a includes a first charging field effect transistor 210a and a first discharge field effect transistor 220a. The second field effect transistor group 200b includes a second charging field effect transistor 210b and a second discharge field effect transistor 220b. The first charging field effect transistor 210a, the second charging field effect transistor 210b, and the first temperature sensor 300 are disposed in the first region 110. The first discharge field effect transistor 220a, the second discharge field effect transistor 220b, and the second temperature sensor 400 are disposed in the second region 120. The first temperature sensor 300 is configured to monitor the temperatures of the first charging field effect transistor 210a and the second charging field effect transistor 210b. The second temperature sensor 400 is configured to monitor the temperatures of the first discharge field effect transistor 220a and the second discharge field effect transistor 220b.

[0102] In some possible implementation manners, all the charging field effect transistors 210 are arranged in a straight line along the second direction.

[0103] In this way, the size of the first region 110 in the first direction can be made smaller. When the space for arranging devices in the second direction is relatively sufficient, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0104] The first region 110 includes a first side 111 and a second side 112 that are opposite to each other in the second direction. The first side 111 and the second side 112 both extend along the first direction and are both perpendicular to the second direction. The charging field effect transistors 210 and the first temperature sensor 300 are disposed between the first side 111 and the second side 112. Exemplarily, the first side 111 may coincide with the side of the substrate 100, or the first side 111 may not coincide with the side of the substrate 100. Exemplarily, the second side 112 may coincide with the side of the substrate 100, or the second side 112 may not coincide with the side of the substrate 100.

[0105] The first region 110 further includes a fifth side, which is located on any one of the opposite sides of the first region 110 in the first direction. The fifth side extends in the second direction and is perpendicular to the first direction. The two ends of the fifth side can be connected to the first side 111 and the second side 112 respectively.

[0106] The second region 120 includes a third side 121 and a fourth side 122 that are opposite to each other in the second direction. Both the third side 121 and the fourth side 122 extend in the first direction and are perpendicular to the second direction. The discharge field effect transistor 220 and the second temperature sensor 400 are disposed between the third side 121 and the fourth side 122. Exemplarily, the third side 121 can coincide with the side of the substrate 100, or the third side 121 can also not coincide with the side of the substrate 100. Exemplarily, the fourth side 122 can coincide with the side of the substrate 100, or the fourth side 122 can also not coincide with the side of the substrate 100.

[0107] The second region 120 further includes a sixth side, which is located on any one of the opposite sides of the second region 120 in the first direction. The sixth side extends in the second direction and is perpendicular to the first direction. The two ends of the sixth side can be connected to the third side 121 and the fourth side 122 respectively.

[0108] The direction perpendicular to the first side 111 from the end of the charging field effect transistor 210 close to the first side 111 is the same as the direction perpendicular to the third side 121 from the end of the discharge field effect transistor 220 close to the third side 121.

[0109] The direction perpendicular to the second side 112 from the end of the charging field effect transistor 210 close to the second side 112 is the same as the direction perpendicular to the fourth side 122 from the end of the discharge field effect transistor 220 close to the fourth side 122.

[0110] In some examples where all the charging field effect transistors 210 are arranged in a straight line in the second direction, the distance between the end of the first temperature sensor 300 close to the fifth side and the fifth side is greater than the distance between the end of the charging field effect transistor 210 far from the fifth side and the fifth side. Thus, the size of the first region 110 in the second direction can be made smaller. In addition, when the number of the charging field effect transistors 210 is large, it is convenient to monitor the temperatures of all the charging field effect transistors 210.

[0111] The fifth side can be the side of the first region 110 close to the second region 120, or the fifth side can also be the side of the first region 110 far from the second region 120.

[0112] In some examples where all the charging field effect transistors 210 are arranged in a straight line along the second direction, the size of the first temperature sensor 300 in the second direction is greater than or equal to the size of the first temperature sensor 300 in the first direction, which can make the size of the first region 110 in the first direction smaller.

[0113] In some examples where all the charging field effect transistors 210 are arranged in a straight line along the second direction, the size of the charging field effect transistor 210 in the first direction is greater than or equal to the size of the charging field effect transistor 220 in the second direction, so as to facilitate arranging a larger number of charging field effect transistors 210 along the second direction.

[0114] In some possible implementation manners, all the discharging field effect transistors 220 are arranged in a straight line along the second direction.

[0115] In this way, the size of the second region 120 in the first direction can be made smaller. When there is sufficient space for arranging devices in the second direction, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0116] In some examples where all the discharging field effect transistors 220 are arranged in a straight line along the second direction, the distance between one end of the second temperature sensor 400 close to the sixth side and the sixth side is greater than the distance between one end of the discharging field effect transistor 220 far from the sixth side and the sixth side. In this way, the size of the second region 120 in the second direction can be made smaller. In addition, when the number of discharging field effect transistors 220 is large, it is convenient to monitor the temperatures of all the discharging field effect transistors 220.

[0117] The sixth side can be the side of the second region 120 close to the first region 110, or the sixth side can also be the side of the second region 120 far from the first region 110.

[0118] In some examples where all the discharging field effect transistors 220 are arranged in a straight line along the second direction, the size of the second temperature sensor 400 in the second direction is greater than or equal to the size of the second temperature sensor 400 in the first direction, which can make the size of the second region 120 in the first direction smaller.

[0119] In some examples where all the discharging field effect transistors 220 are arranged in a straight line along the second direction, the size of the discharging field effect transistor 220 in the first direction is greater than or equal to the size of the discharging field effect transistor 220 in the second direction, so as to facilitate arranging a larger number of discharging field effect transistors 220 along the second direction.

[0120] Figure 6 Schematic diagram of another battery protection board provided by an embodiment of the present application.

[0121] AsFigure 6 As shown, in some possible embodiments, all the charging field effect transistors 210 are arranged in a straight line along the first direction.

[0122] In this way, the size of the first region 110 in the second direction can be made smaller. When there is sufficient space for arranging devices in the first direction, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0123] Exemplarily, the first charging field effect transistor 210a and the second charging field effect transistor 210b are arranged in a straight line along the first direction.

[0124] In some possible embodiments, all the discharging field effect transistors 220 are arranged in a straight line along the first direction.

[0125] In this way, the size of the second region 120 in the second direction can be made smaller. When there is sufficient space for arranging devices in the first direction, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0126] Exemplarily, the first discharging field effect transistor 220a and the second discharging field effect transistor 220b are arranged in a straight line along the first direction.

[0127] In some possible embodiments, the charging field effect transistors 210 and the discharging field effect transistors 220 are arranged in a straight line along the first direction. That is to say, when there are multiple groups of field effect transistor groups 200 connected in parallel on the substrate 100, all the charging field effect transistors 210 and all the discharging field effect transistors 220 are arranged in a straight line along the first direction.

[0128] In this way, the size of the substrate 100 in the second direction can be made smaller. When there is sufficient space for arranging devices in the first direction, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0129] Exemplarily, the first charging field effect transistor 210a, the second charging field effect transistor 210b, the first discharging field effect transistor 220a, and the second discharging field effect transistor 220b are arranged in a straight line along the first direction

[0130] In some possible embodiments, the size of the charging field effect transistor 210 in the second direction is greater than or equal to the size of the charging field effect transistor 210 in the first direction.

[0131] In this way, it is convenient to arrange a relatively large number of charging field effect transistors 210 along the first direction.

[0132] In some examples, the size of each charging field effect transistor 210 in the first direction is the same.

[0133] In some possible embodiments, the size of the discharge field effect transistor 220 in the second direction is greater than or equal to the size of the discharge field effect transistor 220 in the first direction.

[0134] In this way, it is convenient to arrange a relatively large number of discharge field effect transistors 220 in the first direction.

[0135] In some examples, the size of each discharge field effect transistor 220 in the first direction is the same.

[0136] In some examples, the size of the charging field effect transistor 210 in the first direction is the same as the size of the discharge field effect transistor 220 in the first direction.

[0137] In some examples, the size of the charging field effect transistor 210 in the second direction is the same as the size of the discharge field effect transistor 220 in the second direction.

[0138] In some examples, the size of the charging field effect transistor 210 in the first direction is the same as the size of the charging field effect transistor 210 in the second direction. The size of the discharge field effect transistor 220 in the first direction is the same as the size of the discharge field effect transistor 220 in the second direction. For example, the size of the charging field effect transistor 210 in the first direction and the size of the charging field effect transistor 210 in the second direction can both be 3.3 mm, and the size of the discharge field effect transistor 220 in the first direction and the size of the discharge field effect transistor 220 in the second direction can both be 3.3 mm.

[0139] Exemplarily, the first direction is the length direction of the substrate 100, and the second direction is the width direction of the substrate 100. In this way, it is beneficial to reduce the width of the substrate 100. When there is sufficient space for arranging devices in the length direction of the substrate 100, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0140] Figure 7 It is a schematic diagram of the first region of a battery protection board provided by an embodiment of the present application.

[0141] Such as Figure 7As shown, in some possible embodiments, the distance between the end of the first temperature sensor 300 away from the first side 111 and the first side 111 is less than the distance between the end of the charging field effect transistor 210 close to the first side 111 and the first side 111, or the distance between the end of the first temperature sensor 300 away from the second side 112 and the second side 112 is less than the distance between the end of the charging field effect transistor 210 close to the second side 112 and the second side 112. The first temperature sensor 300 is located between the first side 111 and the end of the charging field effect transistor 210 close to the first side 111, or the first temperature sensor 300 is located between the second side 112 and the end of the charging field effect transistor 210 close to the second side 112.

[0142] In this way, when the number of charging field effect transistors 210 is large, it is convenient to arrange the first temperature sensor 300 at a position with a higher temperature in the first area 110, facilitating the first temperature sensor 300 to monitor the temperatures of all the charging field effect transistors 210.

[0143] Exemplarily, a part of the first temperature sensor 300 is located between the first side 111 and the end of the first charging field effect transistor 210a close to the first side 111, and a part of the first temperature sensor 300 is located between the first side 111 and the end of the second charging field effect transistor 210b close to the first side 111. In this way, the arrangement between the first charging field effect transistor 210a and the second charging field effect transistor 210b can be made more compact, which is beneficial to reducing the size of the first area 110 in the first direction.

[0144] In some examples where the first temperature sensor 300 is located between the first side 111 and the end of the charging field effect transistor 210 close to the first side 111, the size of the first temperature sensor 300 in the first direction is greater than or equal to the size of the first temperature sensor 300 in the second direction.

[0145] In this way, the size of the first area 110 in the second direction can be made smaller. When there is sufficient space for arranging devices in the first direction, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0146] Such as Figure 7As shown, at this time, along the second direction, the distance between the first temperature sensor 300 and the first side 111 is G1, the width of the first temperature sensor 300 is W1, the distance between the first temperature sensor 300 and the end of the charging field effect transistor 210 close to the first side 111 is G2, the length of the charging field effect transistor 210 is L1, the distance between the end of the charging field effect transistor 210 close to the second side 112 and the second side 112 is G3, and the width of the substrate 100 at the first region 110 is W2. At this time, W2 = G1 + W1 + G2 + L1 + G3.

[0147] Exemplarily, L1 can be 3.3 mm, W1 can be 0.5 mm, G2 can be 0.4 mm, G3 can be 0.5 mm, G1 can be 0.5 mm. At this time, W2 can be 5.2 mm.

[0148] Figure 8 It is a schematic diagram of the second region of a battery protection board provided by an embodiment of the present application.

[0149] As Figure 8 shown, in some possible implementation manners, the distance between the end of the second temperature sensor 400 far from the third side 121 and the third side 121 is less than the distance between the end of the discharge field effect transistor 220 close to the third side 121 and the third side 121, or the distance between the end of the second temperature sensor 400 far from the fourth side 122 and the fourth side 122 is less than the distance between the end of the discharge field effect transistor 220 close to the fourth side 122 and the fourth side 122. The second temperature sensor 400 is located between the third side 121 and the end of the discharge field effect transistor 220 close to the third side 121. Or, the second temperature sensor 400 is located between the fourth side 122 and the end of the discharge field effect transistor 220 close to the fourth side 122.

[0150] In this way, when the number of the discharge field effect transistors 220 is large, it is convenient to arrange the second temperature sensor 400 at a position with a higher temperature in the second region 120, which is convenient for the second temperature sensor 400 to monitor the temperatures of all the discharge field effect transistors 220.

[0151] In addition, when the charging field effect transistors 210 and the discharge field effect transistors 200 are linearly distributed along the first direction, the orientations of the end of the charging field effect transistor 210 close to the first temperature sensor 300 and the end of the discharge field effect transistor 220 close to the second temperature sensor 400 in the second direction are the same, which can make the size of the substrate 100 in the second direction smaller. When the space for arranging devices in the first direction is relatively sufficient, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0152] Exemplarily, a part of the second temperature sensor 400 is located between the third side 121 and one end of the first discharge field effect transistor 220a close to the third side 121, and a part of the second temperature sensor 400 is located between the third side 121 and one end of the second discharge field effect transistor 220b close to the third side 121. In this way, the arrangement between the first discharge field effect transistor 220a and the second discharge field effect transistor 220b can be made relatively compact, which is conducive to reducing the size of the second region 120 in the first direction.

[0153] In some examples where the second temperature sensor 400 is located between the third side 121 and one end of the discharge field effect transistor 220 close to the third side 121, the size of the second temperature sensor 400 in the first direction is greater than or equal to the size of the second temperature sensor 400 in the second direction.

[0154] In this way, the size of the second region 120 in the second direction can be made smaller. When there is sufficient space for arranging devices in the first direction, it is conducive to increasing the size of the battery cell 11, improving the energy density of the battery 10, and reducing the cost of the substrate 100.

[0155] As Figure 8 shown, at this time, along the second direction, the distance between the second temperature sensor 400 and the third side 121 is G4, the width of the second temperature sensor 400 is W3, the distance between the second temperature sensor 400 and one end of the discharge field effect transistor 220 close to the third side 121 is G5, the length of the discharge field effect transistor 220 is L2, the distance between one end of the discharge field effect transistor 220 close to the fourth side 122 and the fourth side 122 is G6, and the width of the substrate 100 at the second region 120 is W4. At this time, W4 = G4 + W3 + G5 + L2 + G6.

[0156] Exemplarily, L2 can be 3.3 mm, W3 can be 0.5 mm, G5 can be 0.4 mm, G4 can be 0.5 mm, G6 can be 0.5 mm. At this time, W4 can be 5.2 mm, and W2 is equal to W4.

[0157] As Figure 6 shown, in some possible implementation manners, the first temperature sensor 300 and the second temperature sensor 400 are arranged in a straight line along the first direction.

[0158] In this way, when the first temperature sensor 300 is arranged on the side of the charging field effect transistor 210 in the second direction and the second temperature sensor 400 is arranged on the side of the discharge field effect transistor 220 in the second direction, the size of the substrate 100 in the second direction can be made smaller. When there is sufficient space for arranging devices in the first direction, it is conducive to increasing the size of the battery cell 11, improving the energy density of the battery 10, and reducing the cost of the substrate 100.

[0159] Figure 9 This is a schematic diagram of another battery protection board provided by an embodiment of the present application. Figure 10 This is a schematic diagram of the first region of another battery protection board provided by an embodiment of the present application.

[0160] As Figure 9 、 Figure 10 shown, in some possible implementation manners, the distance between one end of the first temperature sensor 300 close to the first side 111 and the first side 111 is greater than the distance between one end of the charging field effect transistor 210 close to the first side 111 and the first side 111.

[0161] In this way, the size of the first region 110 in the second direction can be made smaller. When the space for arranging devices in the first direction is relatively sufficient, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0162] The distance between one end of the first temperature sensor 300 close to the second side 112 and the second side 112 is greater than the distance between one end of the charging field effect transistor 210 close to the second side 112 and the second side 112.

[0163] In this way, the size of the first region 110 in the second direction can be made smaller. When the space for arranging devices in the first direction is relatively sufficient, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0164] In some examples where the distance between one end of the first temperature sensor 300 close to the first side 111 and the first side 111 is greater than the distance between one end of the charging field effect transistor 210 close to the first side 111 and the first side 111, and the distance between one end of the first temperature sensor 300 close to the second side 112 and the second side 112 is greater than the distance between one end of the charging field effect transistor 210 close to the second side 112 and the second side 112, charging field effect transistors 210 are provided on both sides of the first temperature sensor 300 in the first direction.

[0165] In this way, it is convenient for the first temperature sensor 300 to monitor the temperatures of multiple charging field effect transistors 210 more accurately.

[0166] Exemplarily, in the first direction, the first temperature sensor 300 is disposed between the first charging field effect transistor 210a and the second charging field effect transistor 210b.

[0167] In some examples where the distance between one end of the first temperature sensor 300 close to the first side 111 and the first side 111 is greater than the distance between one end of the charging field effect transistor 210 close to the first side 111 and the first side 111, and the distance between one end of the first temperature sensor 300 close to the second side 112 and the second side 112 is greater than the distance between one end of the charging field effect transistor 210 close to the second side 112 and the second side 112, the size of the first temperature sensor 300 in the second direction is greater than or equal to the size of the first temperature sensor 300 in the first direction.

[0168] In this way, the first temperature sensor 300 occupies less space of the substrate 100 in the first direction, which is beneficial to reducing the size of the first region 110 in the first direction.

[0169] Such as Figure 10 shown, at this time, along the second direction, the distance between the first side 111 and one end of the charging field effect transistor 210 close to the first side 111 is G7, the length of the charging field effect transistor 210 is L1, the distance between the second side 112 and one end of the charging field effect transistor 210 close to the second side 112 is G8, and the width of the substrate 100 at the first region 110 is W5, and W5 = G7 + L1 + G8.

[0170] Exemplarily, L1 can be 3.3 mm, and both G7 and G8 can be 0.5 mm. At this time, W5 can be 4.3 mm, and W5 is less than W2.

[0171] Figure 11 It is a schematic diagram of the second region of another battery protection board provided by the embodiment of the present application.

[0172] Such as Figure 11 shown, and referring to Figure 9 , in some possible implementation manners, the distance between one end of the second temperature sensor 400 close to the third side 121 and the third side 121 is greater than the distance between one end of the discharging field effect transistor 220 close to the third side 121 and the third side 121.

[0173] In this way, the size of the second region 120 in the second direction can be made smaller. When there is sufficient space for arranging devices in the first direction, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0174] The distance between one end of the second temperature sensor 400 close to the fourth side 122 and the fourth side 122 is greater than the distance between one end of the discharging field effect transistor 220 close to the fourth side 122 and the fourth side 122.

[0175] In this way, the size of the second region 120 in the second direction can be made smaller. When there is sufficient space for arranging devices in the first direction, it is beneficial to increase the size of the battery cell 11, improve the energy density of the battery 10, and reduce the cost of the substrate 100.

[0176] In some examples where the distance between one end of the second temperature sensor 400 close to the third side 121 and the third side 121 is greater than the distance between one end of the discharge field effect transistor 220 close to the third side 121 and the third side 121, and the distance between one end of the second temperature sensor 400 close to the fourth side 122 and the fourth side 122 is greater than the distance between one end of the discharge field effect transistor 220 close to the fourth side 122 and the fourth side 122, the discharge field effect transistors 220 are provided on both sides of the second temperature sensor 400 in the first direction.

[0177] In this way, it is convenient for the second temperature sensor 400 to accurately monitor the temperatures of multiple discharge field effect transistors 220.

[0178] Exemplarily, in the first direction, the second temperature sensor 400 is disposed between the first discharge field effect transistor 220a and the second discharge field effect transistor 220b.

[0179] In some examples where the distance between one end of the second temperature sensor 400 close to the third side 121 and the third side 121 is greater than the distance between one end of the discharge field effect transistor 220 close to the third side 121 and the third side 121, and the distance between one end of the second temperature sensor 400 close to the fourth side 122 and the fourth side 122 is greater than the distance between one end of the discharge field effect transistor 220 close to the fourth side 122 and the fourth side 122, the size of the second temperature sensor 400 in the second direction is greater than or equal to the size of the second temperature sensor 400 in the first direction.

[0180] In this way, the second temperature sensor 400 occupies less space of the substrate 100 in the first direction, which is beneficial to reducing the size of the second region 120 in the first direction.

[0181] As Figure 11 shown, at this time, along the second direction, the distance between the third side 121 and one end of the discharge field effect transistor 220 close to the third side 121 is G9, the length of the discharge field effect transistor 220 is L2, the distance between the fourth side 122 and one end of the discharge field effect transistor 220 close to the fourth side 122 is G10, and the width of the substrate 100 at the second region 120 is W6, and W6 = G9 + L2 + G10.

[0182] Exemplarily, L2 can be 3.3 mm, and both G9 and G10 can be 0.5 mm. At this time, W6 can be 4.3 mm, and W6 is equal to W5.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery protection board (12), characterized in that: It comprises a substrate (100), a field effect tube group (200), a first temperature sensor (300) and a second temperature sensor (400); The field effect tube group (200) is arranged on the substrate (100); The field effect tube group (200) comprises a charging field effect tube (210) and a discharging field effect tube (220); The first temperature sensor (300) is arranged at the charging field effect tube (210), and the first temperature sensor (300) is used to collect the temperature of the charging field effect tube (210); The second temperature sensor (400) is arranged at the discharge field effect tube (220), and the second temperature sensor (400) is used to collect the temperature of the discharge field effect tube (220).

2. The battery protection board (12) according to claim 1, characterized in that: The substrate (100) comprises a first region (110) and a second region (120), wherein the first region (110) and the second region (120) are arranged at intervals in a first direction; The charging field effect tube (210) and the first temperature sensor (300) are arranged in the first area (110), and the discharging field effect tube (220) and the second temperature sensor (400) are arranged in the second area (120).

3. The battery protection board (12) according to claim 2, characterized in that: The substrate (100) is provided with a plurality of groups of field effect tube groups (200) connected in parallel with each other; The charging field effect tube (210) of each field effect tube group (200) is arranged in the first area (110), and the discharging field effect tube (220) of each field effect tube group (200) is arranged in the second area (120).

4. The battery protection board (12) according to claim 3, characterized in that: All the charging field effect tubes (210) are arranged in a straight line along the first direction, and all the discharging field effect tubes (220) are arranged in a straight line along the first direction.

5. The battery protection board (12) according to claim 4, characterized in that: The charging field effect tube (210) and the discharging field effect tube (220) are arranged in a straight line along the first direction.

6. The battery protection board (12) according to claim 4, characterized in that: The first region (110) comprises a first side edge (111) and a second side edge (112) which are opposite to each other along a second direction, and the first side edge (111) and the second side edge (112) both extend along the first direction; The distance between one end of the first temperature sensor (300) close to the first side (111) and the first side (111) is greater than the distance between one end of the charging field effect tube (210) close to the first side (111) and the first side (111), or the distance between one end of the first temperature sensor (300) close to the second side (112) and the second side (112) is greater than the distance between one end of the charging field effect tube (210) close to the second side (112) and the second side (112); The second region (120) comprises a third side edge (121) and a fourth side edge (122) which are opposite to each other along the second direction, and the third side edge (121) and the fourth side edge (122) both extend along the first direction; The distance between one end of the second temperature sensor (400) close to the third side (121) and the third side (121) is greater than the distance between one end of the discharge field effect tube (220) close to the third side (121) and the third side (121), or the distance between one end of the second temperature sensor (400) close to the fourth side (122) and the fourth side (122) is greater than the distance between one end of the discharge field effect tube (220) close to the fourth side (122) and the fourth side (122); The first direction is perpendicular to the second direction.

7. The battery protection board (12) according to claim 6, characterized in that: The charging field effect transistor (210) is provided on both sides of the first temperature sensor (300) in the first direction; The discharge field effect tube (220) is disposed on both sides of the second temperature sensor (400) in the first direction.

8. The battery protection board (12) according to claim 6, characterized in that: The size of the first temperature sensor (300) in the second direction is greater than or equal to the size of the first temperature sensor (300) in the first direction; The size of the second temperature sensor (400) in the second direction is greater than or equal to the size of the second temperature sensor (400) in the first direction.

9. The battery protection board (12) according to claim 4, characterized in that: The first region (110) comprises a first side edge (111) and a second side edge (112) opposite to each other along a second direction, and the first side edge (111) and the second side edge (112) extend along the first direction; The distance between an end of the first temperature sensor (300) away from the first side (111) and the first side (111) is smaller than the distance between an end of the charging field effect tube (210) close to the first side (111) and the first side (111), or the distance between an end of the first temperature sensor (300) away from the second side (112) and the second side (112) is smaller than the distance between an end of the charging field effect tube (210) close to the second side (112) and the second side (112); The second region (120) comprises a third side edge (121) and a fourth side edge (122) which are opposite to each other along the second direction, and the third side edge (121) and the fourth side edge (122) both extend along the first direction; The distance between an end of the second temperature sensor (400) away from the third side (121) and the third side (121) is smaller than the distance between an end of the discharge field effect tube (220) close to the third side (121) and the third side (121), or the distance between an end of the second temperature sensor (400) away from the fourth side (122) and the fourth side (122) is smaller than the distance between an end of the discharge field effect tube (220) close to the fourth side (122) and the fourth side (122); The first direction is perpendicular to the second direction.

10. The battery protection board (12) according to claim 9, characterized in that: The size of the first temperature sensor (300) in the first direction is greater than or equal to the size of the first temperature sensor (300) in the second direction; The size of the second temperature sensor (400) in the first direction is greater than or equal to the size of the second temperature sensor (400) in the second direction.

11. The battery protection board (12) according to claim 2, characterized in that: The size of the charging field effect tube (210) in the second direction is greater than or equal to the size of the charging field effect tube (210) in the first direction; The size of the discharge field effect tube (220) in the second direction is greater than or equal to the size of the discharge field effect tube (220) in the first direction; Wherein, the first direction is the length direction of the substrate (100).

12. The battery protection board (12) according to claim 3, characterized in that: The first region (110) comprises a fifth side edge, the fifth side edge is located on one side of the first region (110) in the first direction, and the fifth side edge extends along the second direction; All of the charging field effect tubes (210) are arranged in a straight line along the second direction, the size of the charging field effect tubes (210) in the first direction is greater than or equal to the size of the charging field effect tubes (210) in the second direction, and the distance between an end of the first temperature sensor (300) close to the fifth side and the fifth side is greater than the distance between an end of the charging field effect tube (210) away from the fifth side and the fifth side; The second region (120) comprises a sixth side edge, the sixth side edge is located on one side of the second region (120) in the first direction, and the sixth side edge extends along the second direction; All of the discharge field effect tubes (220) are arranged in a straight line along the second direction, the size of the discharge field effect tubes (220) in the first direction is greater than or equal to the size of the discharge field effect tubes in the second direction, and the distance between an end of the second temperature sensor (400) close to the sixth side and the sixth side is greater than the distance between an end of the discharge field effect tube (220) away from the sixth side and the sixth side.

13. The battery protection board (12) according to any one of claims 1 to 12, characterized in that: Also included is a processor (500); The processor (500) is arranged on the substrate (100); The first temperature sensor (300) and the second temperature sensor (400) are both electrically connected to the processor (500).

14. The battery protection board (12) according to any one of claims 1 to 12, characterized in that: The distance between the first temperature sensor (300) and the charging field effect tube (210) is smaller than the distance between the first temperature sensor (300) and the discharging field effect tube (220); The distance between the second temperature sensor (400) and the discharge field effect tube (220) is smaller than the distance between the second temperature sensor (400) and the charge field effect tube (210).

15. The battery protection board (12) according to any one of claims 1 to 12, characterized in that: Components are arranged between the charging field effect tube (210) and the discharging field effect tube (220), and the components arranged between the charging field effect tube (210) and the discharging field effect tube (220) are non-heat-generating components.

16. A battery (10), characterized in that: It comprises a battery protection plate (12) as described in any one of claims 1 to 15.

17. An electrical device (1), characterized in that: It comprises a battery protection plate (12) as described in any one of claims 1 to 15 or a battery (10) as described in claim 16.

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