Battery protection board, battery and electric equipment

Abstract

The utility model discloses a battery protection board, a battery and electric equipment, relates to the technical field of power supplies, and is used for realizing a power-off restart control function. In order to solve the problem that power-off restart control is inconvenient in a novel notebook computer at present, the battery protection board is provided, and a switch module is arranged between a power supply output provided by a battery for a host mainboard and a power supply input end of the host mainboard to control on-off of an access. And the switch-on and switch-off of the switch module are controlled by a power-off restart control signal accessed by the controlled end of the switch module, so that the power-off restart of the main board of the host is realized. According to the scheme, the quick turn-off of the host mainboard power supply and the reset control after power failure can be realized without disassembling the host. Moreover, the scheme is simple in structure, does not need to change a system circuit on a main board of the host, can be well suitable for various hosts, and has higher universality.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply technical field especially relates to a battery protection board, battery and electric equipment. BACKGROUND

[0002] Power-off restart is one of important fault recovery mechanisms of computer processing fault. Through power-off restart to computer mainboard, can effectively solve many hardware faults and software faults of computer.

[0003] At present, in the host mainboard of new notebook computer and other computer equipment, usually replace traditional button cell with lithium battery pack with autonomous control protection to power the host mainboard. At this time, lithium battery pack needs to add a pin (Pin) to power the host mainboard to replace the role of button cell.

[0004] But, because this scheme relies on the interface of lithium battery pack single hardware output to power the host mainboard, so the host can not conveniently control the switch of this power supply input, especially in the computer equipment such as notebook computer, the battery that powers the host mainboard is basically built-in in the equipment.

[0005] Therefore, how to provide convenient power-off restart control for new notebook computer becomes a problem to be solved by the technical personnel in the field. INVENTION CONTENTS

[0006] The utility model aims at providing a battery protection board, battery and electric equipment to provide a convenient power-off restart control scheme for new notebook computer.

[0007] To solve the above technical problem, the utility model provides a battery protection board, which comprises: a switch module and a replacement power supply pin.

[0008] The first end of the switch module is connected with the output end of the battery, the second end of the switch module is connected with the power input end of the host mainboard through the replacement power supply pin, and the controlled end of the switch module is connected with the power-off restart control signal.

[0009] In a possible embodiment, the utility model further comprises a control module.

[0010] The output end of the control module is connected with the controlled end of the switch module.

[0011] The power-off restart control signal is provided by the control module.

[0012] In a possible embodiment, the utility model further comprises a host power-off signal receiving pin.

[0013] The host power-off signal receiving pin is connected with the first input end of the control module and receives the host power-off signal sent by the host mainboard.

[0014] In a possible implementation, the system detection pin is further included.

[0015] The system detection pin is connected with a second input end of the control module.

[0016] In a possible implementation, a third input end of the control module is connected with a system management bus of the host mainboard.

[0017] In a possible implementation, the switch module comprises a switch tube.

[0018] The first end of the switch tube is connected with an output end of the battery, the second end of the switch tube is connected with a power input end of the host mainboard through the substitute power pin, and the controlled end of the switch tube is connected with the power-off restart control signal.

[0019] In a possible implementation, the switch module comprises a P-type field effect tube and an N-type field effect tube.

[0020] The source of the P-type field effect tube is connected with the output end of the battery, the drain of the P-type field effect tube is connected with the power input end of the host mainboard through the substitute power pin, and the gate of the P-type field effect tube is connected with the drain of the N-type field effect tube.

[0021] The source of the N-type field effect tube is grounded, and the gate of the N-type field effect tube is connected with the power-off restart control signal.

[0022] In a possible implementation, a current-limiting resistor is further included.

[0023] The current-limiting resistor is arranged between the second end of the switch module and the substitute power pin.

[0024] To solve the above technical problems, the utility model further provides a battery, which comprises the battery protection board.

[0025] To solve the above technical problems, the utility model further provides a power consumption equipment, which comprises the battery protection board.

[0026] The utility model provides a kind of battery protection board, switch module is arranged between the power supply output provided by battery for host mainboard and the power supply input end of host mainboard to control the on-off of this passage, and the conduction of switch module and shutdown is controlled by the power-off restart control signal of switch module controlled end access control.When switch module is off, the passage between battery output end and the power supply input end of host mainboard is shut off, host mainboard has no power input, and the power-off control of host mainboard is realized.And when switch module resumes conduction, the power supply signal of battery output is smoothly accessed by the power supply input end of host mainboard, so as to realize the power-off restart of host mainboard.It can be seen from the above that the battery protection board provided by the utility model provides a convenient power-off restart control scheme for the computer equipment of new notebook computer etc.

[0027] The utility model provides a kind of battery and electric equipment, with the above battery protection board, effect is same. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model, the drawings needed in the embodiments will be simply introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and for ordinary skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0029] Figure 1 The structural diagram of the battery protection board provided by the utility model is shown in the figure;

[0030] Figure 2 The structural diagram of another battery protection board provided by the utility model is shown in the figure;

[0031] Figure 3 The hardware control schematic diagram of a new notebook computer provided by the utility model is shown in the figure;

[0032] Wherein, 10-battery protection board, 11-switch module, 12-control module, 13-current limiting resistor, 20-battery. DETAILED DESCRIPTION

[0033] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0034] The core of the present application is to provide a battery protection board, a battery and an electric device.

[0035] In order to enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] The traditional old notebook computer generally installs a button cell on the computer motherboard to provide power input, thereby ensuring the normal operation of the notebook computer. However, with the development of technology, the current new notebook computer usually uses a lithium battery pack with autonomous protection control to replace the button cell as the power supply of the computer motherboard. The implementation scheme is to add a special pin (Pin) for the host motherboard power supply in the original interface of the lithium battery pack and the notebook computer, thereby replacing the function of the button cell.

[0037] However, the above scheme relies on the interface of the lithium battery pack for the power supply of the host motherboard, so the host cannot conveniently control the switch of the power supply input. Especially in today's computer devices such as notebook computers, the battery for the power supply of the host motherboard is basically built-in the device, and it is difficult to manually disconnect the physical connection between the lithium battery pack and the host motherboard. Therefore, how to realize a simple and convenient host power-off restart control has become a key problem in deploying a computer host fault recovery mechanism in the field.

[0038] To solve the above problems, the present application provides a battery protection board 10, as shown in the figure, comprising: a switch module 11 and a replacement power pin. Figure 1

[0039] Among them, the first end of the switch module 11 is connected with the output end of the battery 20, the second end of the switch module 11 is connected with the power input end of the host motherboard through the replacement power pin, and the controlled end of the switch module 11 is connected with the power-off restart control signal.

[0040] ​It should be noted that the battery 20 is a power supply for the host mainboard, and the specific type and model of the battery 20 are not limited in the embodiment. For example, in the host power supply scene of a new notebook computer, the battery 20 can be a lithium battery pack, and further can be a lithium battery pack with self-protection function. Similarly, the host mainboard is the host mainboard of the new notebook computer. However, it should be noted that the host mainboard of the new notebook computer is powered by the lithium battery pack, which is only one application scenario of the battery protection board 10 provided by the utility model. The battery protection board 10 provided by the utility model can also be applied to other scenarios in which the host mainboard is powered by the battery 20, so as to realize power-off restart control based on electrical signals by controlling the switch module 11.

[0041] In addition, the switch module 11 realizes the function of controlling the on-off between the two ends of the switch module 11, and the switch module 11 controls the on-off based on the power-off restart control signal connected to the controlled end. The switch function can be realized by a common electronic switch, such as a switch tube, a relay, etc. The specific type, model and specification of the switch module 11 are not limited in the embodiment, and a suitable electronic switch can be selected as the switch module 11 according to the actual circuit needs (such as the needs of voltage, current, power level and other parameters of the power output).

[0042] Secondly, the alternative power supply pin is a pin specially used for powering the host mainboard. The pin is connected to the power input end of the host mainboard, which is equivalent to the extension of the output end of the battery 20, but the on-off of the extension path between the output end of the battery 20 and the alternative power supply pin is controlled by the switch module 11.

[0043] In addition, the power-off restart control signal connected to the controlled end of the switch module 11 can be issued by any device convenient for engineers to control, or can be issued by a device capable of detecting whether the host system needs to be powered off and restarted. In several possible implementation scenarios, the power-off restart control signal can be realized by an integrated circuit (chip) arranged inside the device (such as a new notebook computer), can be realized by an upper computer or other debugging device connected to the switch module 11 outside the engineering personnel (generally, a debugging interface needs to be reserved outside the device), or can be directly or indirectly output by the host mainboard, and the embodiment does not limit this.

[0044] In addition, the specific form of the power-off restart control signal is not limited in the embodiment, and is generally required to be adaptively set according to the control needs of the switch module 11. The controlled signals of common electronic switches are mainly voltage signals and current signals. In addition, in order to meet the control needs of the two kinds of on-off states of the switch module 11, the power-off restart control signal at least needs to have two different signal states. For example, for the voltage signal as the power-off restart control signal, it can be realized by the voltage signals of two different voltage levels of high level and low level. It also needs to be explained that for the continuous change of the signal quantity of the analog signal, the boundary between the two signal states of the power-off restart control signal can be the threshold value of the electronic switch triggering the on-off state change.

[0045] Based on the above-provided battery protection board 10, the output end of the battery 20 can be extended, and an additional path controlled by the switch module 11 is added between the output of the battery 20 and the input of the host mainboard. When the power-off restart is needed, the switch module 11 is first controlled to be turned off, so that the path between the output end of the battery 20 and the power input end of the host mainboard is broken, and the host mainboard is powered off. Then, the switch module 11 is controlled to be turned on, so that the path between the output end of the battery 20 and the power input end of the host mainboard is connected, and the host mainboard is powered on again, thereby realizing the power-off restart control.

[0046] Based on the above control scheme, the power-off restart control of the host mainboard can be realized only by outputting a specific power-off restart control signal when needed, thereby solving the hardware failure and software failure in the notebook computer application, and the control is convenient and easy to realize. In the implementation process of the power-off control, the host can realize complete power-off reset effect by the hardware circuit structure inside the notebook computer. When the notebook computer has a Basic Input Output System (BIOS) damage or error setting failure, the power supply can be completely removed and then restored to restore the factory settings, so that the host can be restored to normal behavior, without the need for on-site disassembly and maintenance by the after-sales engineer, thereby realizing more convenient power-off restart control.

[0047] On the other hand, it has been explained in the above embodiment that the utility model is not limited to the power-off restart control signal, which can be provided by an integrated circuit (chip) arranged inside the notebook computer, can be provided by an external host computer or a debugging device, or can be directly or indirectly provided by the host. The embodiment provides a possible implementation scheme of the power-off restart control signal, as shown in Figure 2 The battery protection board 10 further comprises a control module 12.

[0048] The output end of the control module 12 is connected with the controlled end of the switch module 11, and the power-off restart control signal is provided by the control module 12.

[0049] It should be noted that the control module 12 in the embodiment only needs to be able to generate a control signal for controlling the switching state of the switching module 11. This function can be realized by a single-chip microcomputer, a processor, or other integrated circuits (chips), and the embodiment does not limit this. In addition, when selecting a suitable control module 12, the control needs of the switching module 11 should be considered to ensure that the power-off restart control signal output by the control module 12 can control the switching module 11 as needed.

[0050] In addition, in a possible embodiment, when the battery protection board 10 provided in the embodiment is applied to the application scenario of supplying power to the mainboard of a new notebook computer by a lithium battery pack, as shown in FIG. 6, the control module 12 can specifically be a battery software control integrated circuit (IC) of the lithium battery pack. That is, the battery software control IC in the lithium battery pack is reused as the control module 12 to realize the embodiment, without the need to introduce a new controller, thereby reducing the cost and making the scheme easier to implement. Without the need to change the original system circuit or externally connect a special circuit (i.e., an additional control module 12), the scheme can adapt to various host computers to achieve convenient power-off restart control. Figure 3

[0051] As described above, the embodiment provides an implementation scheme, which internally builds a control module 12 for generating a power-off restart control signal in a battery protection board 10 to realize the power-off restart control process entirely inside a device (such as a notebook computer), thereby avoiding the inconvenience of disassembling the shell of the device for power-off restart control.

[0052] In addition, on the basis of the above embodiment in which the control module 12 built in the battery protection board 10 is the provider of the power-off restart control signal, the above embodiment does not require how the control module 12 outputs a specific power-off restart control signal at a suitable time to realize the power-off restart of the mainboard of the host computer. However, in actual applications, it is generally more desirable that the control module 12 can automatically realize the judgment of the need of the host computer for power-off restart, thereby avoiding the inconvenience caused by the introduction of other devices or control signals. In view of this, the embodiment provides a further implementation scheme, as shown in FIG. 7, in which the above battery protection board 10 further includes a host computer power-off signal receiving pin. Figure 2

[0053] The host computer power-off signal receiving pin receives the host computer power-off signal sent by the mainboard of the host computer and is connected to the first input end of the control module 12.

[0054] ​​It should be noted that for the host of many devices such as notebook computers, self-checking of the running state is a common protection function. That is, in most scenarios that can be applied by the utility model, the host motherboard as a power-off restart control object generally has the ability to judge whether it needs to be restarted (self-checking ability). Moreover, after the host completes self-checking, it will generally output the self-checking result through certain means. In particular, for such a basic protection function as power-off restart, to ensure reliability, the host will generally output a host power-off signal directly through a specific pin or port to represent whether the host needs to be restarted.

[0055] For example, in one possible example, the host will continuously output a continuous high level as a host power-off signal when working normally. At this time, the control module 12 receiving the high level signal knows that the host does not need to be restarted, keeps the switch module 11 on, and ensures normal power supply of the host motherboard. At another time, the host system self-checking finds that the host has a fault that has interfered with normal work and needs to be restarted to attempt to repair the fault, and the host will output a continuous low level signal. At this time, the control module 12 receiving the low level signal knows that the host needs to be restarted, and controls the switch module 11 to first turn off and then turn on, thereby realizing power-off restart of the host motherboard.

[0056] It should be noted that the above example takes a voltage signal as the implementation form of the host power-off signal, and the high and low levels are also possible forms representing two different states of the host power-off signal, and do not limit the host power-off signal in the above example. For other forms of host power-off signals such as current signals, the scheme provided in the embodiment is also applicable, as long as the control module 12 can normally identify different states of the host power-off signal.

[0057] To this end, the embodiment takes the port of the control module 12 to be led out and directly connected to the host power-off signal sent by the host motherboard, and realizes detection of whether the host needs to be restarted by using the self-checking ability of the host. This way greatly reduces the requirements on the control module 12, making the control module 12 have a wider selection space in selection, and the implementation cost and difficulty are more flexible and controllable. At the same time, based on the Pin directly connected to the host output host power-off signal, compared with the scheme of communicating with the host to know when to restart, it is more reliable and can have a self-powered restart effect without time difference, ensuring the advantages of power-off restart in timeliness and reliability.

[0058] Further, based on the above embodiment, the control module 12 can provide the host shutdown signal provided by the host as a basis for detecting whether the host needs to be powered off and restarted. However, one of the prerequisites for accurately implementing this solution is that the host is normally in place, that is, the host can normally output the corresponding host shutdown signal according to its own running state.

[0059] To this end, the embodiment further provides a further implementation scheme, as shown in Figure 2 The battery protection board 10 further includes a system detection pin.

[0060] The system detection pin is connected to the in-place signal sent by the host mainboard and connected to the second input end of the control module 12.

[0061] That is, in this embodiment, the control module 12 first determines whether the host is in place based on whether the in-place signal sent by the host mainboard is received, and if the host is in place, it can determine whether to power off and restart the host mainboard according to the received host shutdown signal. Avoids the false triggering of power-off and restart of the host when the host is not in place in a specific scenario, and ensures the accuracy and reliability of the power-off and restart control.

[0062] Similarly, for the above embodiment, the host shutdown signal sent by the host is accessed to serve as a basis for determining whether power-off and restart control is needed. Another prerequisite for accurately implementing this solution is that the control module 12 and the host can normally communicate (specifically, the transmission of the host shutdown signal), in other words, the host output host shutdown signal can be correctly recognized by the control module 12.

[0063] To this end, the embodiment further provides a further implementation scheme, as shown in Figure 2 The third input end of the control module 12 is connected to the system management bus of the host mainboard.

[0064] Specifically, in this embodiment, the control module 12 is connected to the system management bus (SMBUS) of the host mainboard, thereby communicating with the host. The host system and the control module 12 can read the flag bit of the power-off and restart function to determine whether they are compatible with each other. If compatible, the subsequent power-off and restart control based on the host shutdown signal can be performed, ensuring the reliability and accuracy of the power-off and restart implementation.

[0065] Further, when the host in place detection scheme of the embodiment is combined with the last embodiment, the initialization sequence can be specifically: the control module 12 first communicates with the host system through the SMBUS to detect whether they are compatible; if compatible, the control module 12 further judges whether the host is in place by reading the in-place signal of the host; if the above conditions are all met, it indicates that the host can output the correct host shutdown signal based on its own state, and the host shutdown signal can also be normally recognized by the control module 12; and then based on the host shutdown signal, the control module 12 can determine when to perform power-off restart control.

[0066] On the other hand, the specific implementation of the switch module 11 is not limited in the above embodiments, and the switch module 11 can be realized by any electronic switch with switching function and controlled by an electrical signal. For the specific implementation of the switch module 11, the embodiment also provides a possible implementation scheme, and the above switch module 11 specifically includes: a switch tube.

[0067] The first end of the switch tube is connected with the output end of the battery 20, the second end of the switch tube is connected with the power input end of the host mainboard through the replacement power supply pin, and the controlled end of the switch tube is connected with the power-off restart control signal.

[0068] That is, in the embodiment, the switch tube is used as the switch module 11 to realize the above functions. The switch tube as a common electronic switch, its opening and cutoff are responsive to the electrical signal input from the controlled end. The switch tube can also be distinguished as a triode, a field effect tube (MOS tube), etc. The triode can be further divided into PNP type triode and NPN type triode, and the MOS tube can be further divided into P type MOS tube and N type MOS tube, etc. The embodiment does not limit this.

[0069] For example, when the switch tube is a triode, based on the size relationship between the voltage between the base and the emitter and the conduction threshold voltage, the triode has different opening or cutoff states. At this time, the power-off restart control signal can be a voltage signal with different voltage levels. Similarly, the conduction and cutoff of the MOS tube are related to the voltage relationship among the source, the drain and the gate of the MOS tube, which is the device characteristics of the MOS tube, and the embodiment does not make too much description here.

[0070] The embodiment realizes the above functions of the switch module 11 through the switch tube, and the circuit structure is simple and easy to realize, so that when the switch module 11 is added between the output end of the battery 20 and the power input end of the host mainboard to control the on-off of the path, it will not bring too high cost, implementation difficulty and too large floor area, which is suitable for the development trend of thin and light notebook computers and the demand for economic benefits.

[0071] On the other hand, the embodiment also provides another possible implementation scheme of the switch module 11, such asFigure 3 As shown, the switch module 11 specifically includes: a P-type field effect transistor (Q1) and an N-type field effect transistor (Q2).

[0072] The source of the P-type field effect transistor is connected with the output end of the battery 20, the drain of the P-type field effect transistor is connected with the power input end of the host mainboard through the substitute power supply pin, and the gate of the P-type field effect transistor is connected with the drain of the N-type field effect transistor.

[0073] The source of the N-type field effect transistor is grounded, and the gate of the N-type field effect transistor is connected with the power-off restart control signal.

[0074] It should be noted that the PMOS and NMOS mentioned above are only electrical elements used in the most basic scheme of the switch module 11 in the embodiment. For example, Figure 3 As shown, other supporting electrical elements such as pull-up resistors R2 and R3 can also be used in actual applications, and the embodiment does not limit this.

[0075] In the embodiment, the switch module 11 is realized by a set of cooperating PMOS and NMOS. When the NMOS is used as a low-side switch (lower transistor), the source is directly grounded, and the gate is applied with a positive voltage to turn on. When the PMOS is used as a high-side switch (upper transistor), the source is connected with the power supply, and the gate is pulled down to be lower than the power supply voltage to turn on, without the need of an additional boost circuit. Therefore, the cooperation of PMOS and NMOS can optimize the driving complexity, power consumption, cost and performance through complementary characteristics, which is a more efficient electronic switch scheme.

[0076] On the other hand, on the basis of the above embodiment, the embodiment further provides a further implementation scheme, as shown in Figure 3 As shown, the battery protection board 10 further includes a current limiting resistor 13.

[0077] The current limiting resistor 13 is arranged between the second end of the switch module 11 and the substitute power supply pin. In Figure 3 The current limiting resistor 13 is the resistor R1.

[0078] In the embodiment, the current limiting resistor arranged between the power supply output end and the host mainboard power supply input end limits the current size on the path, protects the safety of the circuit in the path and the circuits before and after the path, and thus guarantees the reliability of the power-off restart control function realized by the battery protection board 10 from another aspect.

[0079] In addition, it should be noted that, Figure 3A hardware control schematic diagram applied to a new notebook computer scene is provided in the scheme provided by the embodiment and the above-mentioned embodiments. The software control IC is a battery software control chip of the lithium battery pack. The hardware power IC is a hardware power circuit of the lithium battery pack for realizing power supply output. The output end of the hardware power IC corresponds to an end of the lithium battery pack which is additionally led out for supplying power to the host mainboard. In addition, when the software control IC is used as the control module 12, a host shutdown signal receiving pin, a system detection pin, and a pin for connecting with a system management bus can also be led out. For the Figure 3 Other circuit parts related to the application of the lithium battery pack in the embodiment are all conventional schemes in the current notebook computer application. The embodiment will not be described here.

[0080] On the other hand, in addition to the battery protection board provided in the above-mentioned embodiments, the embodiment also provides a possible embodiment corresponding to the battery. Specifically, the embodiment provides a battery including the battery protection board provided in any of the above-mentioned embodiments.

[0081] Since the embodiment of the battery part corresponds to the embodiment of the battery protection board part, the embodiment of the battery part is described in the description of the embodiment of the battery protection board part, which will not be described here.

[0082] The battery provided in the embodiment includes the battery protection board provided in any of the above-mentioned embodiments, which can bring the same technical effects as the battery protection board in the above-mentioned embodiments. In particular, when the battery provided in the embodiment is used as a power supply of a notebook computer or the like, the power-off restart control of the host in the notebook computer can be conveniently realized due to the battery protection board included in the battery, and the control effect of self-power-off and reset without time difference can be realized. Moreover, the battery provided in the embodiment is an integrated device which integrates the original battery and the battery pack provided in the above-mentioned embodiments, which is more convenient for the construction and deployment of the notebook computer system structure and is suitable for the development trend of the miniaturization and thinning of the notebook computer.

[0083] On the other hand, the embodiment also provides an embodiment corresponding to an electric device. The electric device provided in the embodiment includes the battery provided in the above-mentioned embodiments, which can bring the same technical effects as the battery.

[0084] Similarly, since the embodiment of the electric device part corresponds to the embodiment of the battery part, and the embodiment of the battery part corresponds to the embodiment of the battery protection board part, the embodiment of the electric device part is described in the description of the embodiment of the battery protection board part, which will not be described here.

[0085] The battery protection plate, the battery and the electric equipment provided by the utility model are introduced in detail. The embodiments in the specification are described in a progressive manner, and each embodiment mainly explains the difference from other embodiments. The same or similar parts between the embodiments can be understood by referring to each other. It should be pointed out that, for ordinary skilled in the art, without departing from the principle of the utility model, the utility model can be improved and modified in many ways, and these improvements and modifications also fall within the protection scope of the utility model.

[0086] It should also be noted that in the specification, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A battery protection plate, characterized in that, The battery protection board comprises: a switch module and a substitute power supply pin; wherein a first end of the switch module is connected with an output end of a battery, a second end of the switch module is connected with a power input end of a host mainboard through the substitute power supply pin, and a controlled end of the switch module is connected with a power-off restart control signal.

2. The battery protection plate of claim 1, wherein, Further comprising: a control module; an output end of the control module is connected with the controlled end of the switch module; the power-off restart control signal is provided by the control module.

3. The battery protection plate of claim 2, wherein, Further comprising: a host power-off signal receiving pin; wherein the host power-off signal receiving pin is connected with a host power-off signal sent by the host mainboard and connected with a first input end of the control module.

4. The battery protection plate of claim 3, wherein, Further comprising: a system detection pin; wherein the system detection pin is connected with an in-place signal sent by the host mainboard and connected with a second input end of the control module.

5. The battery protection plate of claim 4, wherein, a third input end of the control module is connected with a system management bus of the host mainboard.

6. The battery protection plate according to any one of claims 1 to 5, characterized in that, The switch module comprises: a switch tube; 7. The battery protection plate according to any one of claims 1 to 5, characterized in that, wherein a first end of the switch tube is connected with an output end of the battery, a second end of the switch tube is connected with a power input end of the host mainboard through the substitute power supply pin, and a controlled end of the switch tube is connected with the power-off restart control signal. The switch module comprises: a P-type field effect tube and an N-type field effect tube; 8. The battery protection plate of claim 1, wherein, wherein a source of the P-type field effect tube is connected with an output end of the battery, a drain of the P-type field effect tube is connected with a power input end of the host mainboard through the substitute power supply pin, and a gate of the P-type field effect tube is connected with a drain of the N-type field effect tube; a source of the N-type field effect tube is grounded, and a gate of the N-type field effect tube is connected with the power-off restart control signal. Further comprising:

9. A battery, characterized by a current-limiting resistor; the current-limiting resistor is arranged between the second end of the switch module and the substitute power supply pin.

10. An electric device, characterized by The battery protection board comprises: the battery protection board according to any one of claims 1 to 8. The battery protection board comprises: the battery protection board according to claim 9.

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