Anti-sparking control circuit and vehicle

Abstract

The utility model relates to the technical field of battery management, and discloses an anti-sparking control circuit and a vehicle, the anti-sparking control circuit comprises a voltage lead-in end, a time delay module, a low-position switch control module and a high-position switch control module; the time delay module is used for charging an internal capacitor through voltage after the voltage leading-in end is externally connected with the voltage; the low-position switch control module is used for being switched on after the charging voltage of the time delay module reaches the starting voltage of the low-position switch control module, so that an internal low-position switch is switched on; the high-position switch control module is used for being connected with a battery management system and enabling an internal high-position switch to be switched on after the low-position switch is switched on so as to convert the level state of an output control signal, and the control signal is used for controlling a discharging switch tube in the battery management system to be switched on, so that ignition is prevented and the battery pack is controlled to discharge. The battery pack is controlled to supply power to the vehicle in a delayed mode, the sparking phenomenon is avoided, and the design thought is simpler, controllable and reliable.

Description

Technical Field

[0001] The present application relates to the field of battery management technology, and in particular to an anti-ignition control circuit and a vehicle. Background Art

[0002] The vehicle includes battery cells, battery management system (BMS), controller system, instrument, frame, etc. The battery cells and battery management system (BMS) form a battery pack (PACK); when the battery pack is assembled on the vehicle, there is a large capacitor inside the controller system. At this time, if the output end of the battery pack is charged, it is very easy to ignite. For intelligent BMS, software delay control can be performed to achieve anti-ignition at the moment of contact, while non-intelligent BMS cannot perform software delay control because of its pure hardware design. For designs in this regard, most of the current situations either do not exist or the control time is short and cannot achieve the ideal effect. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide an anti-ignition control circuit and a vehicle to effectively prevent the instantaneous ignition of a non-intelligent battery pack when it is connected to a vehicle.

[0004] An anti-spark control circuit provided in an embodiment of the present application is applied to a vehicle, wherein the vehicle includes a battery pack, the battery pack includes a battery management system, and the anti-spark control circuit includes a voltage introduction terminal, a delay module, a low-position switch control module, and a high-position switch control module;

[0005] The delay module is used to charge the internal capacitor through the voltage after the voltage introduction end is externally connected to the voltage;

[0006] The low-level switch control module is used to turn on after the charging voltage of the delay module reaches its own turn-on voltage, so that the internal low-level switch is turned on;

[0007] The high-level switch control module is used to connect to the battery management system, and after receiving the low-level switch conduction, it turns on the internal high-level switch to convert the level state of the output control signal. The control signal is used to control the closure of the discharge switch tube in the battery management system, thereby preventing ignition and controlling the discharge of the battery pack.

[0008] In combination with the first aspect, the embodiment of the present application provides a first possible implementation of the first aspect, wherein the delay module includes a first current limiting resistor, a second current limiting resistor, an energy storage capacitor and a voltage stabilizing diode;

[0009] One end of the first current limiting resistor is connected to the voltage introduction end, and the other end of the first current limiting resistor is respectively connected to one end of the energy storage capacitor, one end of the second current limiting resistor and the negative electrode of the voltage zener diode, and the other end of the energy storage capacitor and the other end of the second current limiting resistor are both grounded; the positive electrode of the voltage zener diode is connected to the low-level switch control module.

[0010] In combination with the first aspect, the embodiment of the present application provides a second possible implementation of the first aspect, wherein the high-level switch control module includes a switch unit and a pull-down unit;

[0011] The switch unit is used to connect to the battery management system and control the discharge switch tube of the battery management system to close according to the level state of the control signal;

[0012] The pull-down unit is connected to the switch unit, and is used to keep the control signal in a level-pull-down state when the switch unit is in a non-conducting state.

[0013] In combination with the first aspect, the embodiment of the present application provides a third possible implementation of the first aspect, wherein the switch unit includes a third current limiting resistor, a fourth current limiting resistor, a fifth current limiting resistor and a triode; the pull-down unit includes a pull-down resistor;

[0014] One end of the third current limiting resistor is respectively connected to one end of the fourth current limiting resistor and the base of the transistor, the emitter of the transistor and the other end of the fourth current limiting resistor are connected to a power supply, the collector of the transistor is connected to one end of the pull-down resistor and one end of the fifth current limiting resistor, the other end of the pull-down resistor is grounded, and the other end of the fifth current limiting resistor is connected to the battery management system.

[0015] In combination with the first aspect, the embodiment of the present application provides a fourth possible implementation of the first aspect, wherein the low-level switch control module includes a switch tube and a discharge resistor;

[0016] The gate of the switch tube and one end of the discharge resistor are connected to the anode of the voltage-regulating diode, the source of the switch tube and the other end of the discharge resistor are grounded, and the drain of the switch tube is connected to the other end of the third current-limiting resistor.

[0017] In combination with the first aspect, the embodiment of the present application provides a fifth possible implementation of the first aspect, wherein the delayed on-time calculation relationship of the low-level switch control module is:

[0018]

[0019] Where, t is the delayed on-time of the low-level switch control module, V cis the external voltage, V is the on-state voltage of the voltage-stabilizing diode, R is the sum of the resistances of the first current-limiting resistor and the second current-limiting resistor, C is the capacitance of the energy storage capacitor, and e is a constant.

[0020] In combination with the first aspect, the embodiment of the present application provides a sixth possible implementation of the first aspect, which further includes a port protection module;

[0021] The port protection module is used to guide the transient voltage to the ground when the transient voltage at the voltage introduction terminal is too high.

[0022] In combination with the first aspect, the embodiment of the present application provides a seventh possible implementation of the first aspect, wherein the port protection module includes a transient voltage suppression diode;

[0023] The cathode of the transient voltage suppression diode is grounded, and the anode of the transient voltage suppression diode is connected to the voltage introduction terminal.

[0024] In a second aspect, an embodiment of the present application further provides a vehicle, comprising a battery pack and the anti-ignition control circuit.

[0025] In combination with the first aspect, an embodiment of the present application provides a first possible implementation of the second aspect, wherein the battery pack includes a plurality of battery cells and a battery management system, the plurality of battery cells are connected to the battery management system, and the battery management system is connected to the anti-ignition control circuit.

[0026] The embodiments of the present application have the following beneficial effects:

[0027] An anti-spark control circuit and a vehicle according to an embodiment of the present application are applied to a vehicle, wherein the vehicle includes a battery pack, the battery pack includes a battery management system, and the anti-spark control circuit includes a voltage introduction terminal, a delay module, a low-level switch control module, and a high-level switch control module; the delay module is used to charge the internal capacitor through the voltage after the voltage introduction terminal is externally connected to the voltage; the low-level switch control module is used to turn on after the charging voltage of the delay module reaches its own start-up voltage, so that the internal low-level switch is turned on; the high-level switch control module is used to connect to the battery management system, and after receiving the low-level switch turn-on, the internal high-level switch is turned on to convert the level state of the output control signal, and the control signal is used to control the discharge switch tube in the battery management system to close, thereby preventing the battery pack from being discharged. Based on the above scheme, when a non-intelligent battery pack is assembled into a vehicle, the anti-spark control circuit realizes the delay control of the battery pack to power the vehicle to avoid the occurrence of sparking, and its design idea is simpler, controllable, and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of protection of the present application. In each of the drawings, similar components are numbered similarly.

[0029] Figure 1 A schematic structural diagram of a vehicle provided in an embodiment of the present application is shown;

[0030] Figure 2 A schematic diagram of the structure of the anti-spark control circuit provided in an embodiment of the present application is shown;

[0031] Figure 3 A circuit diagram of an anti-spark control circuit provided in an embodiment of the present application is shown;

[0032] Figure 4 The software simulation waveform diagram provided in the embodiment of the present application is shown;

[0033] Figure 5 An actual circuit test diagram provided by an embodiment of the present application is shown.

[0034] Description of main component symbols:

[0035] 100-battery pack; 110-multiple battery cells; 120-battery management system; 200-controller system; 300-anti-sparking control circuit; 310-delay module, 320-low-position switch control module; 330-high-position switch control module; 340-port protection module; 331-switch unit; 332-pull-down unit. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0037] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0038] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present application, are intended only to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0039] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0040] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0041] The embodiment of the present application provides a vehicle, Figure 1 The structure diagram of the vehicle of the embodiment of the present application is shown. For example, the vehicle includes a battery pack 100, a controller system 200 and an anti-spark control circuit 300, wherein the positive pole of the battery pack 100 is connected to the controller system 200, and the controller system 200 is connected to the voltage introduction terminal (DSG_DET) of the anti-spark control circuit 300. The battery pack 100 is used to store and supply the electric energy required by the vehicle. The controller system 200 is used to adjust and control the battery pack 100 in real time according to factors such as the state and load of the battery pack 100, to ensure that the charging and discharging process of the battery pack 100 is in a safe and stable state. At the same time, through the transfer of the controller system 200, the charging and discharging data of the battery pack 100 can also be recorded and analyzed, providing more detailed and accurate data support for the maintenance and management of the battery pack 100. It can be understood that the vehicle can also include other components such as instruments and frames, which are not described here. For example, the instrument is used to display various states and parameters of the vehicle, including vehicle speed, power, mileage, etc., to help the driver understand the operation of the vehicle. The frame constitutes the main structure of the vehicle body and provides support and protection for the vehicle. For example, the above-mentioned vehicle can be a small power vehicle such as an electric bicycle or a baby carriage.

[0042] In one embodiment, the battery pack 100 includes a plurality of battery cells 110 and a battery management system 120, wherein the plurality of battery cells 110 are connected to the battery management system 120, and the battery management system 120 is connected to the anti-spark control circuit 300. The battery management system 120 further includes an analog sampling front end (AFE), a discharge switch tube (DSG MOS) and a charge switch tube (CHG MOS), wherein the discharge switch tube (DSG MOS) is used to control the discharge of the battery pack 100, and the charge switch tube (CHG MOS) is used to control the charge of the battery pack 100. When the controller system 200 manages the discharge of the battery pack 100, the instantaneous discharge of the battery pack 100 is prone to sparking.

[0043] Based on the above vehicle structure, the present application embodiment proposes an anti-spark control circuit 300, which can be used to delay the discharge of the battery pack 100 to prevent the battery pack 100 from instantaneously discharging and sparking. The anti-spark control circuit 300 is described in detail below.

[0044] Please refer to Figure 2 , which is a circuit block diagram of the anti-spark control circuit 300 provided in an embodiment of the present application.

[0045] The anti-ignition control circuit 300 is applied to a vehicle, the vehicle includes a battery pack 100, the battery pack 100 includes a battery management system 120, the anti-ignition control circuit 300 includes a voltage introduction terminal (DSG_DET), a delay module 310, a low-level switch control module 320 and a high-level switch control module 330; specifically, the voltage introduction terminal (DSG_DET), the delay module 310, the low-level switch control module 320 and the high-level switch control module 330 are connected in sequence, the voltage introduction terminal (DSG_DET) is connected to the controller system 200, and the high-level switch control module 330 is connected to the battery management system 120.

[0046] In this embodiment, the delay module 310 is used to charge the internal capacitor through the voltage after the voltage is externally connected to the voltage introduction terminal (DSG_DET); the low-level switch control module 320 is used to be turned on after the charging voltage of the delay module 310 reaches its own turn-on voltage, so that the internal low-level switch is turned on; the high-level switch control module 330 is used to connect to the battery management system 120, and after receiving the low-level switch turn-on, turn on the internal high-level switch to convert the level state of the output control signal. The control signal is used to control the discharge switch tube (DSG MOS) in the battery management system 120 to close, thereby preventing ignition control of the battery pack 100 from discharging.

[0047] The following is a detailed description of each component of the anti-spark control circuit 300. Figure 3 , which is a circuit diagram of the anti-spark control circuit 300 provided in an embodiment of the present application.

[0048] In one embodiment, the delay module 310 includes a first current limiting resistor R1, a second current limiting resistor R2, an energy storage capacitor C1 and a voltage zener diode ZD1; one end of the first current limiting resistor R1 is connected to the voltage introduction end (DSG_DET), and the other end of the first current limiting resistor R1 is respectively connected to one end of the energy storage capacitor C1, one end of the second current limiting resistor R2 and the negative electrode of the voltage zener diode ZD1, and the other end of the energy storage capacitor C1 and the other end of the second current limiting resistor R2 are both grounded GND; the positive electrode of the voltage zener diode ZD1 is connected to the low-level switch control module 320.

[0049] In this embodiment, the energy storage capacitor C1 is first in a charging state when the battery pack 100 needs to be discharged. The external voltage charges the energy storage capacitor C1 until the voltage of the energy storage capacitor C1 reaches the turn-on voltage of the Zener diode ZD1, and the Zener diode ZD1 is turned on.

[0050] Exemplarily, the delay module 310 is connected to the voltage introduction terminal (DSG_DET) and is used to extend the conduction time of the low-level switch control module 320 and the high-level switch control module 330 when an external voltage is input to the voltage introduction terminal (DSG_DET), thereby extending the closing time of the discharge switch tube (DSG MOS) in the battery management system 120. In the case where the battery pack 100 of the vehicle has no output voltage, only the positive electrode of the battery pack 100 is powered by the high-level drive. In this environment, the positive electrode of the battery pack 100 is first connected to the controller system 200 in the vehicle, and then transferred to the voltage introduction terminal (DSG_DET) by the controller system 200.

[0051] In one implementation, the low-level switch control module 320 includes a switch tube Q1 and a discharge resistor R6; the gate of the switch tube Q1 and one end of the discharge resistor R6 are connected to the positive electrode of the voltage-stabilizing diode ZD1, the source of the switch tube Q1 and the other end of the discharge resistor R6 are grounded GND, and the drain of the switch tube Q1 is connected to the other end of the third current-limiting resistor R3.

[0052] Exemplarily, the switch tube Q1 is used to charge the internal gate capacitor after the voltage regulator diode ZD1 is turned on. When the voltage of the internal gate capacitor reaches the turn-on voltage of the switch tube Q1, the switch tube Q1 is turned on, thereby turning on the triode Q2. The bleeder resistor R6 is used to discharge the induced voltage generated by the excessive voltage, thereby protecting the normal operation of the switch tube Q1 and other circuit components and avoiding failures caused by overvoltage. The bleeder resistor R6 is also used to quickly dissipate the stored energy, accelerate the closing speed of the switch tube Q1, improve the response speed of the switch tube Q1, and reduce the heat generated when the switch tube Q1 is turned off, reducing damage to the switch tube Q1, thereby extending its service life.

[0053] In this embodiment, the high-level switch control module 330 includes a switch unit 331 and a pull-down unit 332. The switch unit 331 is used to connect to the battery management system 120 and control the discharge switch tube (DSG MOS) of the battery management system 120 to close according to the level state of the control signal; the pull-down unit 332 is connected to the switch unit 331 and is used to keep the control signal in a level pull-down state when the switch unit 331 is in a non-conducting state.

[0054] In one embodiment, the switch unit 331 includes a third current limiting resistor R3, a fourth current limiting resistor R4, a fifth current limiting resistor R5 and a transistor Q2; the pull-down unit 332 includes a pull-down resistor R7; one end of the third current limiting resistor R3 is respectively connected to one end of the fourth current limiting resistor R4 and the base of the transistor Q2, the emitter of the transistor Q2 and the other end of the fourth current limiting resistor R4 are connected to the power supply VCC, the collector of the transistor Q2 is connected to one end of the pull-down resistor R7 and one end of the fifth current limiting resistor R5, the other end of the pull-down resistor R7 is grounded GND, and the other end of the fifth current limiting resistor R5 is connected to the battery management system 120.

[0055] Exemplarily, when the switch tube Q1 is not turned on, the transistor Q2 is not turned on, and the pull-down resistor R7 keeps the state of the control signal unchanged; when the switch tube Q1 is turned on, the transistor Q2 is turned on, and the state of the control signal is changed to close the discharge switch tube (DSG MOS). The pull-down resistor R7 is used to pull down the holding level of the control signal when the battery pack 100 does not need to be discharged, thereby avoiding interference from circuits and electrical noise.

[0056] Further optionally, the anti-spark control circuit further includes a port protection module 340. Specifically, the voltage introduction terminal (DSG_DET), the port protection module 340, the delay module 310, the low-level switch control module 320 and the high-level switch control module 330 are connected in sequence, and the port protection module 340 is used to guide the transient voltage to the ground when the transient voltage at the voltage introduction terminal (DSG_DET) is too high.

[0057] In one implementation, the port protection module 340 includes a transient voltage suppressor diode TVS5; a cathode of the transient voltage suppressor diode TVS5 is grounded GND, and an anode of the transient voltage suppressor diode TVS5 is connected to a voltage introduction terminal (DSG_DET).

[0058] It can be understood that when the battery pack 100 is not assembled on the vehicle and does not need to be discharged, the pull-down resistor R7 keeps the control signal in the pull-down state. At this time, the discharge switch tube (DSG) of the battery management system 120 MOS) is turned off, and the battery pack 100 has no output; when the battery pack 100 is installed in the vehicle and needs to be discharged, the voltage introduction terminal (DSG_DET) inputs an external voltage. Due to the existence of the energy storage capacitor C1, the voltage zener diode ZD1 will not be turned on at the moment when the battery pack 100 needs to be discharged, so the switch tube Q1 and the transistor Q2 cannot be turned on either; the voltage charges the energy storage capacitor C1 through the first current limiting resistor R1, and when the voltage of the energy storage capacitor C1 is charged to the turn-on voltage of the voltage zener diode ZD1, the voltage zener diode ZD1 starts to be turned on, and after the voltage zener diode ZD1 is turned on, it charges the internal gate capacitance of the switch tube Q1, and when the turn-on voltage of the switch tube Q1 is reached, the switch tube Q1 and the transistor Q2 are turned on, and at this time, the level state of the control signal is converted, and the battery management system 120 controls the discharge switch tube (DSGMOS) to be turned on.

[0059] Exemplarily, the delayed discharge time of the battery pack 100 is specifically determined by the parameters of the first current limiting resistor R1 , the second current limiting resistor R2 , the energy storage capacitor C1 and the voltage stabilizing diode ZD1 .

[0060] For example, in one implementation, the delayed on time calculation formula of the low-level switch control module is:

[0061]

[0062] Where, t is the delayed on time of the low-level switch control module 320, V c is the external voltage, V is the on-state voltage of the voltage-stabilizing diode ZD1, R is the sum of the resistances of the first current-limiting resistor R1 and the second current-limiting resistor R2, C is the capacitance of the energy storage capacitor C1, and e is a constant.

[0063] It can be understood that the principle of the anti-spark control circuit 300 to extend the discharge time of the battery pack 100 is to use the time relationship between the energy storage capacitor C1 and the voltage To realize hardware delay, the delay time can be adjusted by adjusting the parameters of the first current limiting resistor R1, the second current limiting resistor R2, the energy storage capacitor C1 and the voltage stabilizing diode ZD1.

[0064] by Figure 3 Take the circuit design shown in the figure as an example and verify it through software simulation. The results are as follows Figure 4As shown in the simulation waveform, it can be seen from the simulation waveform that when the voltage input terminal (DSG_DET) is found to input an external voltage, the battery pack 100 has no voltage output; at this time, the energy storage capacitor C1 is charging, and after the voltage stabilizing diode ZD1 is turned on, the gate of the switch tube Q1 begins to have voltage; after the switch tube Q1 and the transistor Q2 are turned on, the level state of the control signal is converted, and the discharge switch tube (DSG MOS) is closed, so that the battery pack 100 has voltage output. And, as Figure 5 As shown, through actual circuit testing, the discharge delay time of the battery pack 100 can be extended to seconds.

[0065] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0066] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0067] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0068] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. An anti-spark control circuit, characterized in that: Applied to a vehicle, the vehicle includes a battery pack, the battery pack includes a battery management system, the anti-ignition control circuit includes a voltage introduction terminal, a delay module, a low-level switch control module and a high-level switch control module; The delay module is used to charge the internal capacitor through the voltage after the voltage introduction end is externally connected to the voltage; The low-level switch control module is used to turn on after the charging voltage of the delay module reaches its own turn-on voltage, so that the internal low-level switch is turned on; The high-level switch control module is used to connect to the battery management system, and after receiving the low-level switch conduction, it turns on the internal high-level switch to convert the level state of the output control signal. The control signal is used to control the closure of the discharge switch tube in the battery management system, thereby preventing ignition and controlling the discharge of the battery pack.

2. The anti-spark control circuit according to claim 1, characterized in that: The delay module includes a first current limiting resistor, a second current limiting resistor, an energy storage capacitor and a voltage stabilizing diode; One end of the first current limiting resistor is connected to the voltage introduction end, and the other end of the first current limiting resistor is respectively connected to one end of the energy storage capacitor, one end of the second current limiting resistor and the negative electrode of the voltage zener diode, and the other end of the energy storage capacitor and the other end of the second current limiting resistor are both grounded; the positive electrode of the voltage zener diode is connected to the low-level switch control module.

3. The anti-spark control circuit according to claim 2, characterized in that: The high-position switch control module includes a switch unit and a pull-down unit; The switch unit is used to connect to the battery management system and control the discharge switch tube of the battery management system to close according to the level state of the control signal; The pull-down unit is connected to the switch unit, and is used to keep the control signal in a level-pull-down state when the switch unit is in a non-conducting state.

4. The anti-spark control circuit according to claim 3, characterized in that: The switch unit includes a third current limiting resistor, a fourth current limiting resistor, a fifth current limiting resistor and a triode; the pull-down unit includes a pull-down resistor; One end of the third current limiting resistor is respectively connected to one end of the fourth current limiting resistor and the base of the transistor, the emitter of the transistor and the other end of the fourth current limiting resistor are connected to a power supply, the collector of the transistor is connected to one end of the pull-down resistor and one end of the fifth current limiting resistor, the other end of the pull-down resistor is grounded, and the other end of the fifth current limiting resistor is connected to the battery management system.

5. The anti-spark control circuit according to claim 4, characterized in that: The low-level switch control module includes a switch tube and a discharge resistor; The gate of the switch tube and one end of the discharge resistor are connected to the anode of the voltage-regulating diode, the source of the switch tube and the other end of the discharge resistor are grounded, and the drain of the switch tube is connected to the other end of the third current-limiting resistor.

6. The anti-spark control circuit according to claim 2, characterized in that: The calculation formula of the delayed on time of the low-position switch control module is: Where, t is the delayed on-time of the low-level switch control module, V c is the external voltage, V is the on-state voltage of the voltage-stabilizing diode, R is the sum of the resistances of the first current-limiting resistor and the second current-limiting resistor, C is the capacitance of the energy storage capacitor, and e is a constant.

7. The anti-spark control circuit according to claim 1, characterized in that: Also included is a port protection module; The port protection module is used to guide the transient voltage to the ground when the transient voltage at the voltage introduction terminal is too high.

8. The anti-spark control circuit according to claim 7, characterized in that: The port protection module includes a transient voltage suppression diode; The cathode of the transient voltage suppression diode is grounded, and the anode of the transient voltage suppression diode is connected to the voltage introduction terminal.

9. A vehicle, characterized in that: It comprises a battery pack and an anti-spark control circuit as claimed in any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The battery pack includes a plurality of battery cells and a battery management system, the plurality of battery cells are connected to the battery management system, and the battery management system is connected to the anti-ignition control circuit.

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