Protection circuit, drive control device, and vehicle

Abstract

The invention relates to a protection circuit, a drive control device and a vehicle. The protection circuit comprises: a first thermistor having a negative temperature coefficient; the second thermistor has a positive temperature coefficient; wherein the first thermistor and the second thermistor are connected in series to form a series branch, and the series branch is connected in series with a power supply path of a circuit to be protected; the switch module is connected with the series branch in parallel, the switch module is connected with the to-be-protected circuit, and the switch module is used for selecting the short-circuited series branch according to a control signal output by the to-be-protected circuit; wherein the series branch circuit is used for reducing surge current on the power supply access circuit under the condition that the circuit to be protected is powered on through the power supply access circuit and the series branch circuit is not short-circuited by the switch module. The protection circuit provided by the invention can restrain surge current.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a protection circuit, a drive control device and a vehicle. Background Art

[0002] With the development of new energy technologies, new energy vehicles are gradually becoming popular in people's lives.

[0003] At the moment when the motor controller of a new energy vehicle is powered on, a large surge current will be generated on the input line, which may cause irreversible damage to the electronic components on the motor controller. Currently, there are no special protection measures designed for this phenomenon. Summary of the invention

[0004] Based on this, it is necessary to provide a protection circuit, a drive control device and a vehicle that can suppress surge current in response to the above technical problems.

[0005] In a first aspect, the present application proposes a protection circuit, comprising:

[0006] a first thermistor having a negative temperature coefficient;

[0007] A second thermistor having a positive temperature coefficient; wherein the first thermistor and the second thermistor are connected in series to form a series branch, and the series branch is connected in series to a power supply path of the circuit to be protected;

[0008] A switch module, the switch module is connected in parallel with the series branch, the switch module is connected to the circuit to be protected, and the switch module is used to select short-circuit the series branch according to the control signal output by the circuit to be protected; wherein,

[0009] The series branch is used to reduce the surge current on the power supply path when the circuit to be protected is powered on through the power supply path and the series branch is not short-circuited by the switch module.

[0010] In one embodiment, the switch module comprises:

[0011] An optical coupler, wherein the light receiving branch of the optical coupler is connected in parallel with the series branch, the first end of the light emitting branch of the optical coupler is grounded, and the second end of the light emitting branch of the optical coupler is used to receive a control signal output by the circuit to be protected, so as to control the on-off state of the light receiving branch according to the control signal.

[0012] In one embodiment, the protection circuit further includes a fixed value resistor, and the fixed value resistor is connected in parallel with the first thermistor.

[0013] In a second aspect, the present application provides a drive control device, the drive control device comprising:

[0014] A protection circuit as described in any one of the above embodiments;

[0015] A power supply circuit, used for providing a first power supply voltage;

[0016] A drive control circuit, wherein the series branches in the protection circuit are respectively connected to the power supply circuit and the drive control circuit, and the drive control circuit is also connected to the switch module in the protection circuit, and the drive control circuit is used to output a control signal to control the on-off state of the switch module.

[0017] In one embodiment, the control signal includes a first control signal, the protection circuit includes a first protection circuit; and the drive control circuit includes:

[0018] a control module connected to the power supply circuit, used to receive the first power supply voltage, and used to output first state information, wherein the series branch of the first protection circuit is connected in series with a first power supply path between the power supply circuit and the control module;

[0019] The judgment module is connected to the control module and the switch module in the first protection circuit respectively, so as to control the on-off state of the switch module in the first protection circuit according to the first state information.

[0020] In one embodiment, the first state information includes a power state signal and a board temperature state signal; and the control module includes:

[0021] a first control unit, connected to the power supply circuit and the judgment module respectively, for receiving the first power supply voltage and for outputting the power supply status signal;

[0022] The second control unit is connected to the first control unit and the judgment module respectively, and is used to output the board temperature status signal.

[0023] In one embodiment, the determination module includes:

[0024] An AND gate unit is respectively connected to the first control unit, the second control unit and the switch module in the first protection circuit, and the AND gate unit is used to control the on-off state of the switch module in the first protection circuit according to the power supply state signal and the board temperature state signal.

[0025] In one embodiment, the protection circuit further includes a second protection circuit; the drive control circuit further includes: a communication module and a drive module, the control module is connected to the drive module, and the communication module is connected to the control module and the drive module respectively, wherein:

[0026] The communication module is used to send the second state information of the driving module to the control module;

[0027] The series branch of the second protection circuit is connected in series to a second power supply path between the control module and the drive module. The control module is also connected to the switch module in the second protection circuit to control the on / off state of the switch module in the second protection circuit according to the second state information.

[0028] In one embodiment, the drive control circuit further includes a drive module; the control module further includes:

[0029] a first filtering unit, connected to the power supply circuit and the first control unit respectively, the first control unit receives the first power supply voltage via the first filtering unit, and the first filtering unit is used to filter the first power supply voltage;

[0030] The second filtering unit is connected to the first control unit and the driving module respectively, wherein the first control unit is further used to output a second power supply voltage according to the first power supply voltage, and the second filtering unit is used to filter the second power supply signal.

[0031] In a third aspect, the present application provides a vehicle, comprising the drive control device described in any one of the above embodiments.

[0032] The above-mentioned protection circuit, drive control device and vehicle have a first thermistor, a second thermistor and a switch module, the first thermistor has a negative temperature coefficient, the second thermistor has a positive temperature coefficient, the first thermistor and the second thermistor are connected in series to form a series branch, the series branch is connected in series to the power supply path of the circuit to be protected, the switch module is connected in parallel to the series branch, the switch module is connected to the circuit to be protected, and the switch module is used to select the short-circuit series branch according to the control signal output by the circuit to be protected, wherein the series branch is used to reduce the surge current on the power supply path when the circuit to be protected is powered on through the power supply path and the series branch is not short-circuited by the switch module. In application, by connecting the protection circuit of the present application in series to the power supply path of the motor controller, the surge current on the power supply path of the motor controller can be suppressed to protect the motor controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 is a schematic diagram of the structure of a protection circuit in one embodiment;

[0035] Figure 2 A schematic diagram of the structure of a protection circuit in another embodiment;

[0036] Figure 3 A schematic diagram of the structure of a protection circuit in yet another embodiment;

[0037] Figure 4 is a schematic structural diagram of a drive control device in one embodiment;

[0038] Figure 5 is a schematic structural diagram of a drive control device in another embodiment;

[0039] Figure 6 A schematic diagram of the structure of a drive control device in yet another embodiment;

[0040] Figure 7 is a structural schematic diagram of a drive control device in yet another embodiment;

[0041] Figure 8 FIG. 4 is a schematic diagram of the structure of a drive control device in yet another embodiment. DETAILED DESCRIPTION

[0042] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0044] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0045] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0046] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0047] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0048] In an exemplary embodiment, see Figure 1 The present application provides a protection circuit 1 , which includes: a first thermistor R1 , a second thermistor R2 and a switch module 12 .

[0049] The first thermistor R1 has a negative temperature coefficient, and the second thermistor R2 has a positive temperature coefficient, wherein the first thermistor and the second thermistor are connected in series to form a series branch 11, the series branch 11 is connected in series to the power supply path of the circuit to be protected 2, the switch module 12 is connected in parallel to the series branch 11, the switch module 11 is connected to the circuit to be protected 2, and the switch module is used to select the short-circuit series branch 11 according to the control signal output by the circuit to be protected 2, wherein the series branch 11 is used to reduce the surge current on the power supply path when the circuit to be protected 2 is powered on through the power supply path and the series branch 11 is not short-circuited by the switch module 12.

[0050] In this embodiment, the protection circuit 1 of the present application can be connected in series to the power supply path of the power supply 3 to the circuit to be protected 2, and the circuit to be protected 2 can be a motor controller. Under normal temperature conditions, when the power supply 3 supplies power to the circuit to be protected 2, at the moment of power-on, since the first thermistor R1 has a negative temperature coefficient, the resistance of the first thermistor R1 is relatively large when the power supply 3 supplies power to the circuit to be protected 2, which can effectively suppress the surge current on the power supply path under normal temperature conditions. Under high temperature conditions, since the second thermistor R2 has a positive temperature coefficient, the resistance of the second thermistor R2 is relatively large at high temperatures, so the second thermistor R2 can suppress the surge current on the power supply path when the power supply 3 supplies power to the circuit to be protected 2 under high temperature conditions.

[0051] When the series branch 11 suppresses the surge current during power-on and the circuit state returns to normal, the switch module can short-circuit the series branch 11 according to the control signal output by the circuit to be protected 2 to completely eliminate the influence of the resistance values ​​of the first thermistor R1 and the second thermistor R2 on the operation of the circuit to be protected 2. When an abnormality occurs in the circuit to be protected 2, such as overcurrent, the switch module 12 can also conduct the series branch 11 according to the control signal output by the circuit to be protected 2, so that the first thermistor R1 and the second thermistor R2 protect the circuit to be protected 2.

[0052] The above protection circuit has a first thermistor, a second thermistor and a switch module, the first thermistor has a negative temperature coefficient, the second thermistor has a positive temperature coefficient, the first thermistor and the second thermistor are connected in series to form a series branch, the series branch is connected in series to the power supply path of the circuit to be protected, the switch module is connected in parallel to the series branch, the switch module is connected to the circuit to be protected, and the switch module is used to select the short-circuit series branch according to the control signal output by the circuit to be protected, wherein the series branch is used to reduce the surge current on the power supply path when the circuit to be protected is powered on through the power supply path and the series branch is not short-circuited by the switch module. In application, by connecting the protection circuit of the present application in series to the power supply path of the motor controller, the surge current on the power supply path of the motor controller can be suppressed to protect the motor controller.

[0053] In an exemplary embodiment, see Figure 2 The switch module 12 includes an optical coupler Q1. The light receiving branch of the optical coupler Q1 is connected in parallel with the series branch 11, the first end of the light emitting branch of the optical coupler Q1 is grounded, and the second end of the light emitting branch of the optical coupler Q1 is used to receive a control signal output by the circuit to be protected 2, so as to control the on-off state of the light receiving branch according to the control signal.

[0054] It can be understood that the second end of the light-emitting branch of the optical coupler Q1 is connected to the circuit to be protected 2, and is used to receive the control signal output by the circuit to be protected 2. When the circuit to be protected 2 is powered on, the circuit to be protected 2 can send a control signal to the optical coupler Q1 according to whether its own working state is normal. If there is an abnormality in the circuit to be protected 2, the light-emitting branch can not emit light according to the control signal, so that the light-receiving branch of the optical coupler Q1 is disconnected, and the first thermistor R1 and the second thermistor R2 continue to work, so that the first thermistor R1 and the second thermistor R2 protect the circuit to be protected 2. If the circuit to be protected 2 operates normally, the light-emitting branch can emit light according to the control signal to turn on the light-receiving branch of the optical coupler Q1, and the first thermistor R1 and the second thermistor R2 are short-circuited to completely eliminate the influence of the resistance values ​​of the first thermistor R1 and the second thermistor R2 on the operation of the circuit to be protected 2. At the same time, since the first thermistor R1 and the second thermistor R2 are short-circuited and are not working, the first thermistor R1 and the second thermistor R2 can slowly return to their original states. When the circuit to be protected 2 is powered on again or the circuit to be protected 2 is abnormal, the first thermistor R1 and the second thermistor R2 can continue to realize the protection function on the basis of the original state.

[0055] In an exemplary embodiment, see Figure 3 The protection circuit 1 further includes a fixed value resistor R3, which is connected in parallel with the first thermistor R1.

[0056] In the application, since the resistance of the first thermistor R1 is too large in a low temperature environment and may affect the startup of the circuit, a certain value resistor R3 can be connected in parallel at both ends of the first thermistor R1 to effectively reduce the resistance of the first thermistor R1 in a low temperature state, so that the first thermistor R1 can also play a role in suppressing surge current in a low temperature environment without affecting the startup.

[0057] In an exemplary embodiment, the present application provides a drive control device, see Figure 4 The drive control device includes: a protection circuit 1, a power supply circuit 4 and a drive control circuit 5 as in any one of the above embodiments.

[0058] The power supply circuit 4 is used to provide a first power supply voltage. The series branch 11 in the protection circuit 1 is connected to the power supply circuit 4 and the drive control circuit 5 respectively, and the drive control circuit 5 is also connected to the switch module 12 in the protection circuit 1. The drive control circuit 5 is used to output a control signal to control the on-off state of the switch module.

[0059] Specifically, the power supply circuit 4 can be equivalent to the power supply 3 in the aforementioned embodiment, and the drive control circuit 5 can be a motor controller, that is, equivalent to the circuit to be protected 2 in the aforementioned embodiment. The protection circuit 1 of the present application can protect the drive control circuit 5 when the drive control circuit 5 is powered on and abnormal, and short-circuit after the drive control circuit 5 operates normally, without affecting the operation of the drive control circuit 5.

[0060] In an exemplary embodiment, see Figure 5 The control signal includes a first control signal, the protection circuit 1 includes a first protection circuit 1 - 1 , and the drive control circuit 5 includes a control module 51 and a judgment module 52 .

[0061] The control module 51 is connected to the power supply circuit 4, and is used to receive the first power supply voltage and output the first state information, wherein the series branch 11-1 of the first protection circuit 1-1 is connected in series to the first power supply path between the power supply circuit 1 and the control module 51. The judgment module 52 is respectively connected to the control module 51 and the switch module 12 in the first protection circuit 1-1 to control the on-off state of the switch module in the first protection circuit according to the first state information.

[0062] Specifically, the first protection circuit 1-1 includes a first thermistor R1-1, a second thermistor R2-1 and a switch module 12-1. The first thermistor R1-1 and the second thermistor R2-1 form a series branch 11-1. The switch module 12-1 includes an optical coupler Q1-1. The first protection circuit 1-1 also includes a fixed resistor R3-1, which is connected in parallel with the first thermistor R1-1.

[0063] The first status information includes a power status signal and a board temperature status signal, the control module 51 includes a first control unit 511 and a second control unit 512 , and the judgment module includes an AND gate unit 521 .

[0064] The first control unit 511 is connected to the power supply circuit 4 and the judgment module 52 respectively, and is used to receive the first power supply voltage and output the power supply status signal. The second control unit 512 is connected to the first control unit and the judgment module respectively, and is used to output the board temperature status signal. The AND gate unit 521 is connected to the first control unit 511, the second control unit 512 and the switch module 12-1 in the first protection circuit 11 respectively, and the AND gate unit is used to control the on-off state of the switch module 12-1 in the first protection circuit 1-1 according to the power supply status signal and the board temperature status signal.

[0065] It can be understood that the drive control circuit 5 is a motor controller, which includes a control board and a drive board. The control board has a first control unit 511 and a second control unit 512. The first control unit 511 can be a power chip, and the second control unit 512 can be an MCU. After the drive control circuit 5 is powered on, the first control unit 511 can output a power status signal according to the power status, and the second control unit 512 can output a board temperature status signal according to the temperature of the control board. For example, when the power status is normal, the power status signal is a high-level signal, and when the power status is abnormal, the power status signal is a low-level signal; when the temperature of the control board is normal, the board temperature status signal is a high-level signal, and when the temperature of the control board is abnormal, the board temperature status signal is a low-level signal. When the power status signal and the board temperature status signal received by the AND gate unit are both high-level signals, the AND gate unit 521 will send a high-level first control signal to the switch module 12-1, that is, the optical coupler Q1-1, to short-circuit the first thermistor R1-1 and the second thermistor R2-1; when the power status is abnormal and / or the temperature of the control board is abnormal, the AND gate unit 521 sends a low-level first control signal to the optical coupler Q1-1, so that the first thermistor R1-1 and the second thermistor R2-1 continue to work to protect the control module 1.

[0066] In an exemplary embodiment, the protection circuit 1 also includes a second protection circuit 1-2; the drive control circuit 5 also includes: a communication module 53 and a drive module 54, the control module 51 and the drive module 54 are connected, and the communication module 53 is respectively connected to the control module 51 and the drive module 54.

[0067] Among them, the communication module 53 is used to send the second status information of the driving module 54 to the control module 51, the series branch of the second protection circuit 1-2 is connected in series in the second power supply path between the control module 51 and the driving module 54, and the control module 51 is also connected to the switch module in the second protection circuit 1-2 to control the on-off state of the switch module in the second protection circuit according to the second status information.

[0068] Specifically, the second protection circuit 1-2 includes a first thermistor R1-2, a second thermistor R2-2 and a switch module 12-2. The first thermistor R1-2 and the second thermistor R2-2 form a series branch 11-2. The switch module 12-2 includes an optical coupler Q1-2. The second protection circuit 1-2 also includes a fixed resistor R3-2, which is connected in parallel with the first thermistor R1-2.

[0069] In the application, the motor controller also includes a driving board, namely, a driving module 54. The communication module is connected to the driving module 54 and the second control unit 512 in the control module 51, respectively, so as to send the second state information of the driving module 54 to the control module 51. The first control unit 511 is also used to output a second power supply voltage according to the first power supply voltage to power the driving module 54. When the first control unit 511 powers the driving module 54, there may also be a surge current. Therefore, in the present application, a second protection circuit 1-2 is set between the first control unit 511 and the driving module 54, so that the first thermistor R1-2 and the second thermistor R2-2 suppress the surge current. When the driving module 54 is powered on, the driving module 54 can send its own second state information to the second control unit 512 through the communication module 53. The second control unit 51 2 can determine whether the driving module 54 is in a normal working state according to the second state information. When the driving module 54 is in a normal working state, the light-emitting branch of the optical coupler Q1-2 is controlled to emit light, so that the light-receiving branch of the optical coupler Q1-2 is turned on, and the first thermistor R1-2 and the second thermistor R2-2 are short-circuited; when the driving module 54 is in an abnormal working state, the light-emitting branch of the optical coupler Q1-2 is controlled not to emit light, so that the light-receiving branch of the optical coupler Q1-2 is disconnected, and the first thermistor R1-2 and the second thermistor R2-2 continue to work.

[0070] In an exemplary embodiment, see Figure 8 The control module 51 also includes a first filtering unit 513 and a second filtering unit 514 .

[0071] The first filter unit 513 is connected to the power supply circuit and the first control unit respectively, and the first control unit receives the first power supply voltage through the first filter unit 513, and the first filter unit 513 is used to filter the first power supply voltage. The second filter unit 514 is connected to the first control unit 511 and the driving module 54 respectively, wherein the first control unit 511 is also used to output the second power supply voltage according to the first power supply voltage, and the second filter unit 514 is used to filter the second power supply signal.

[0072] In the application, the first filter unit 513 may include components such as filter capacitors, voltage clamping circuits, common mode inductors, etc., and may also include a reverse protection circuit for preventing reverse interference, which may be implemented using a diode or a PMOS tube. The second filter unit 514 may include, but is not limited to, a high-side switch, an LC filter circuit, etc.

[0073] In an exemplary embodiment, the present application provides a vehicle, and the vehicle includes the driving control device of any one of the above embodiments.

[0074] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0075] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A protection circuit, characterized in that: include: a first thermistor having a negative temperature coefficient; A second thermistor having a positive temperature coefficient; wherein the first thermistor and the second thermistor are connected in series to form a series branch, and the series branch is connected in series to a power supply path of the circuit to be protected; A switch module, the switch module is connected in parallel with the series branch, the switch module is connected to the circuit to be protected, and the switch module is used to select short-circuit the series branch according to the control signal output by the circuit to be protected; wherein, The series branch is used to reduce the surge current on the power supply path when the circuit to be protected is powered on through the power supply path and the series branch is not short-circuited by the switch module.

2. The protection circuit according to claim 1, characterized in that: The switch module comprises: An optical coupler, wherein the light receiving branch of the optical coupler is connected in parallel with the series branch, the first end of the light emitting branch of the optical coupler is grounded, and the second end of the light emitting branch of the optical coupler is used to receive a control signal output by the circuit to be protected, so as to control the on-off state of the light receiving branch according to the control signal.

3. The protection circuit according to claim 1, characterized in that: The protection circuit further includes a fixed-value resistor, which is connected in parallel with the first thermistor.

4. A drive control device, characterized in that: The drive control device comprises: The protection circuit according to any one of claims 1 to 3; A power supply circuit, used for providing a first power supply voltage; A drive control circuit, wherein the series branches in the protection circuit are respectively connected to the power supply circuit and the drive control circuit, and the drive control circuit is also connected to the switch module in the protection circuit, and the drive control circuit is used to output a control signal to control the on-off state of the switch module.

5. The drive control device according to claim 4, characterized in that: The control signal includes a first control signal, the protection circuit includes a first protection circuit; and the drive control circuit includes: a control module connected to the power supply circuit, used to receive the first power supply voltage, and used to output first state information, wherein the series branch of the first protection circuit is connected in series with a first power supply path between the power supply circuit and the control module; The judgment module is connected to the control module and the switch module in the first protection circuit respectively, so as to control the on-off state of the switch module in the first protection circuit according to the first state information.

6. The drive control device according to claim 5, characterized in that: The first status information includes a power status signal and a board temperature status signal; the control module includes: a first control unit, connected to the power supply circuit and the judgment module respectively, for receiving the first power supply voltage and for outputting the power supply status signal; The second control unit is connected to the first control unit and the judgment module respectively, and is used to output the board temperature status signal.

7. The drive control device according to claim 6, characterized in that: The judging module comprises: An AND gate unit is respectively connected to the first control unit, the second control unit and the switch module in the first protection circuit, and the AND gate unit is used to control the on-off state of the switch module in the first protection circuit according to the power supply state signal and the board temperature state signal.

8. The drive control device according to claim 5, characterized in that: The protection circuit also includes a second protection circuit; the drive control circuit also includes: a communication module and a drive module, the control module is connected to the drive module, and the communication module is connected to the control module and the drive module respectively, wherein, The communication module is used to send the second state information of the driving module to the control module; The series branch of the second protection circuit is connected in series to a second power supply path between the control module and the drive module. The control module is also connected to the switch module in the second protection circuit to control the on / off state of the switch module in the second protection circuit according to the second state information.

9. The drive control device according to claim 6, characterized in that: The drive control circuit further includes a drive module; the control module further includes: a first filtering unit, connected to the power supply circuit and the first control unit respectively, the first control unit receives the first power supply voltage via the first filtering unit, and the first filtering unit is used to filter the first power supply voltage; The second filtering unit is connected to the first control unit and the driving module respectively, wherein the first control unit is further used to output a second power supply voltage according to the first power supply voltage, and the second filtering unit is used to filter the second power supply signal.

10. A vehicle, characterized in that: The vehicle comprises the drive control device according to any one of claims 4-9.

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