Overcurrent protection high-side driving circuit device and method and vehicle

Abstract

The invention provides a high-side driving circuit device and method for overcurrent protection and a vehicle, and belongs to the technical field of vehicles. The device comprises a power supply module, an overcurrent protection module, a high-side driving module and a regulation and control module. A regulation and control module is connected with the input end of a high-side driving module, a regulation and control signal is output, on-off of the high-side driving module is controlled according to the regulation and control signal, a driving function is achieved, the high-side driving module is connected with a power module through an overcurrent protection module, the overcurrent protection module detects driving current of a driving power supply, and according to the driving current, on-off of the high-side driving module is controlled. On-off of the driving power supply is controlled, so that on-off of output of the driving power supply to the power supply load is controlled; the over-current protection circuit is constructed by using discrete devices instead of a special high-side driving chip, can trigger the turn-off protection in an over-current scene while realizing the basic function of high-side driving, does not need software monitoring and control, and is high in response speed, high in reliability and low in cost.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a high-side drive circuit device and method for overcurrent protection, and a vehicle. Background Technology

[0002] The automotive electronic environment is complex and variable, with frequent occurrences of load short circuits, inrush currents, and abnormal overloads. In automobiles, due to the extensive grounding of metal components, the probability of a load short circuit to ground is far higher than a short circuit to the power supply. Therefore, when a vehicle load experiences a short circuit to ground, the corresponding device must be driven to disconnect the power supply. Currently, circuit solutions using integrated driver chips are costly. Furthermore, existing driver circuits built with discrete components generally only achieve basic functions and cannot provide short-circuit and overcurrent protection. Summary of the Invention

[0003] The main objective of this application is to provide a high-side drive circuit device and method for overcurrent protection, as well as a vehicle, so as to achieve overcurrent protection while realizing the drive function, thereby reducing costs.

[0004] To achieve the above objectives, one aspect of this application provides a high-side drive circuit device for overcurrent protection, the device comprising: Power module, the power module being used to provide drive power; An overcurrent protection module is provided, the input terminal of which is connected to the power supply module. The overcurrent protection module is used to detect the drive current of the drive power supply and determine the short circuit state based on the drive current in order to control the on / off state of the drive power supply. A high-side drive module, wherein the input terminal of the high-side drive module is connected to the output terminal of the overcurrent protection module, and the output terminal of the high-side drive module is connected to the power supply load, and the high-side drive module is used to output the drive power to the power supply load; A control module is connected to the input terminal of the high-side drive module. The control module is used to output a control signal and control the on / off state of the high-side drive module according to the control signal.

[0005] In some embodiments, the high-side driving module includes: A first driving unit, the driving end of the first driving unit is connected to the control module, and the first driving unit is used to output an on / off signal according to the control signal; The second drive unit has its drive end connected to the output end of the first drive unit, its input end connected to the output end of the overcurrent protection module, and its output end connected to the power supply load. The second drive unit is used to control the on / off state of the drive power supply and the power supply load according to the on / off signal.

[0006] In some embodiments, the overcurrent protection module includes: A sampling unit, the input terminal of which is connected to the power supply module, and the output terminal of which is connected to the power supply load through the high-side drive module, the sampling unit being used to acquire the drive current; An overcurrent control unit is provided, the input of which is connected to the output of the sampling unit, and the output of which is connected to the input of the high-side drive module. The overcurrent control unit is used to determine the short-circuit state based on the drive current in order to control the connection and disconnection between the drive power supply and the high-side drive module.

[0007] In some embodiments, the first driving unit includes: A first current-limiting resistor, one end of which is connected to the control module; The first switching transistor has its driving terminal connected to the other end of the first current-limiting resistor, its source connected to ground, and its drain connected to the driving terminal of the second driving unit. The first pull-down resistor has one end connected to the driving terminal of the first switching transistor, and the other end connected to ground.

[0008] In some embodiments, the second driving unit includes: The first voltage divider resistor, one end of which is connected to the output terminal of the first driving unit; The second switching transistor has its driving terminal connected to the other end of the first voltage divider resistor, its emitter connected to the output terminal of the overcurrent protection module, and its collector connected to the power supply load. The second voltage divider resistor has one end connected to the driving terminal of the second switching transistor and the other end of the first voltage divider resistor, and the other end connected to the emitter of the second switching transistor and the output terminal of the overcurrent protection module.

[0009] In some embodiments, the overcurrent control unit includes: A second current-limiting resistor, one end of which is connected to the sampling unit; The third switching transistor has its driving terminal connected to the other end of the second current-limiting resistor, its emitter connected to the power supply module and the sampling unit, and its collector connected to the high-side driving module.

[0010] In some embodiments, the device further includes a filtering module, wherein the input terminal of the filtering module is connected to the output terminal of the high-side drive module, and the output terminal of the filtering module is connected to the power supply load, and the filtering module is used to rectify and filter the drive power supply.

[0011] To achieve the above objectives, another aspect of the embodiments of this application proposes a driving method for an overcurrent protection high-side drive circuit device. The method, applied to one aspect of the embodiments of this application, includes: In response to the vehicle drive command, the control module generates a control signal according to the vehicle drive command and outputs the current control signal to the high-side drive module; wherein, the current control signal is a drive power supply signal; In response to the aforementioned control signal, the high-side drive module outputs drive power to the power supply load; The drive current of the drive power supply is detected. Based on the drive current, the overcurrent protection module determines that the power supply load is in a short circuit state, generates a shutdown signal, and outputs the shutdown signal to the high-side drive module. In response to the shutdown signal, the high-side drive module stops outputting the drive power to the power supply load.

[0012] In some embodiments, the method further includes: In response to a vehicle shutdown command, the control module generates a control signal based on the vehicle shutdown command and outputs the current control signal to the high-side drive module; wherein, the current control signal is a power supply stop signal; In response to the aforementioned shutdown signal, the high-side drive module stops outputting drive power to the power supply load.

[0013] To achieve the above objectives, another aspect of the present application provides a vehicle characterized by including a high-side drive circuit device with overcurrent protection as proposed in one aspect of the present application.

[0014] The embodiments of this application include at least the following beneficial effects: This application provides a high-side drive circuit device and method for overcurrent protection, and a vehicle. This solution connects the high-side drive module to the input terminal of the control module and outputs a control signal. According to the control signal, the on / off state of the high-side drive module is controlled to realize the drive function. The high-side drive module is connected to the power supply module through the overcurrent protection module. The overcurrent protection module detects the drive current of the drive power supply and controls the on / off state of the drive power supply according to the drive current, thereby controlling the on / off state of the output drive power supply to the power supply load. It achieves the basic function of high-side drive without relying on a dedicated high-side drive chip, but is built using discrete components. It can realize the basic function of high-side drive and trigger shutdown protection in overcurrent scenarios. It does not rely on software monitoring and control, has a fast response speed, is simpler, more efficient, more reliable, and has a low cost. It is not constrained by conditions such as chip procurement cycle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the circuit structure of the high-side drive circuit device for overcurrent protection provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structural framework of the high-side drive circuit device for overcurrent protection provided in the embodiments of this application; Figure 3 This is a flowchart of the driving method of the high-side driving circuit device provided in the embodiments of this application.

[0016] Reference numerals: Power supply module 100, overcurrent protection module 200, high-side drive module 300, control module 400, filter module 500, first current limiting resistor R1, first switching transistor Q1, first pull-down resistor R2, second voltage divider resistor R3, first voltage divider resistor R4, second switching transistor Q2, second current limiting resistor R5, third switching transistor Q3. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0018] It is understood that the terms "first," "second," etc., used in this application may be used to describe various concepts herein, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of embodiments of this application, Ethernet signaling information may also be referred to as interface signaling information, and similarly, interface signaling information may also be referred to as Ethernet signaling information. Depending on the context, the words "if" or "when" as used herein may be interpreted as "when," "in response to a determination," or "in the event of a determination."

[0019] As used in this application, the terms "at least one", "multiple", "each", "any", etc., "at least one" includes one, two or more, "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the multiples.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0021] Reference Figure 1 and Figure 2 In some embodiments of this invention, an overcurrent protection high-side drive circuit device includes: a power supply module 100, an overcurrent protection module 200, a high-side drive module 300, and a control module 400.

[0022] The power module 100 is capable of providing drive power to supply power to the power supply load. The power module 100 is a DC power module 100, that is, the drive power is a DC power supply.

[0023] The input terminal of the overcurrent protection module 200 is connected to the power supply module 100, and the output terminal of the overcurrent protection module 200 is connected to the power supply load through the high-side drive module 300. The overcurrent protection module 200 can detect the drive current of the drive power supply, determine whether the power supply load is in a short circuit state based on the drive current, and control the on / off state of the drive power supply based on the judgment result, thereby indirectly controlling the on / off state between the drive power supply and the power supply load.

[0024] The control module 400 is connected to the input terminal of the high-side drive module 300. The control module 400 can output a control signal and control the on / off state of the high-side drive module 300 according to the control signal, thereby indirectly controlling the on / off state between the drive power supply and the power supply load, and realizing the high-side drive function.

[0025] The control module 400 can be an MCU, or other microcontrollers or vehicle domain controllers, and is not limited in this application.

[0026] The input terminal of the high-side drive module 300 is connected to the output terminal of the overcurrent protection module 200, which is connected to the drive power supply through the overcurrent protection module 200. The output terminal of the high-side drive module 300 is connected to the power supply load. The high-side drive module 300 can output the drive power supply to the power supply load to supply power.

[0027] This application connects the control module 400 to the input terminal of the high-side drive module 300, outputting a control signal. Based on the control signal, the high-side drive module 300 is switched on and off to achieve the drive function. The high-side drive module 300 is connected to the power supply module 100 through the overcurrent protection module 200. The overcurrent protection module 200 detects the drive current of the drive power supply and controls the switching on and off of the drive power supply based on the drive current, thereby controlling the on / off of the output drive power supply to the power supply load. This achieves the basic functions of high-side drive without relying on a dedicated high-side drive chip, but rather using discrete components. It can trigger shutdown protection in overcurrent scenarios, without relying on software monitoring and control. It has a fast response speed, is simpler, more efficient, more reliable, and lower in cost, and is not constrained by conditions such as chip procurement cycle.

[0028] Reference Figure 1 and Figure 2 In some embodiments of this invention, the high-side driving module 300 includes: a first driving unit and a second driving unit.

[0029] The drive end of the first drive unit is connected to the control module 400, and the first drive unit can output an on / off signal according to the control signal. The drive end of the second drive unit is connected to the output end of the first drive unit, the input end of the second drive unit is connected to the output end of the overcurrent protection module 200, and the output end of the second drive unit is connected to the power supply load. The second drive unit can control the on / off of the drive power supply and the power supply load according to the on / off signal.

[0030] In one embodiment, when the control signal is driving power, the first driving unit is turned on, and the first driving unit outputs a turn-on signal to the second driving unit. The second driving unit turns on according to the turn-on signal, connecting the power module 100 and the power supply load, and supplying driving power to the power supply load.

[0031] In another embodiment, when the control signal is to stop power supply, the first drive unit is turned off, and the first drive unit outputs a turn-off signal to the second drive unit. The second drive unit turns off according to the turn-off signal, and the power module 100 is disconnected from the power supply load, stopping the output of drive power to the power supply load.

[0032] Specifically, the first driving unit includes: a first current-limiting resistor R1, a first switching transistor Q1, and a first pull-down resistor R2. One end of the first current-limiting resistor R1 is connected to the control module 400, the driving terminal of the first switching transistor Q1 is connected to the other end of the first current-limiting resistor R1, the source of the first switching transistor Q1 is connected to ground, the drain of the first switching transistor Q1 is connected to the driving terminal of the second driving unit, one end of the first pull-down resistor R2 is connected to the driving terminal of the first switching transistor Q1, and the other end of the first pull-down resistor R2 is connected to ground.

[0033] The second driving unit includes: a first voltage divider resistor R4, a second voltage divider resistor R3, and a second switching transistor Q2. One end of the first voltage divider resistor R4 is connected to the output terminal of the first driving unit, that is, one end of the first voltage divider resistor R4 is connected to the drain of the first switching transistor Q1. The driving terminal of the second switching transistor Q2 is connected to the other end of the first voltage divider resistor R4, the emitter of the second switching transistor Q2 is connected to the output terminal of the overcurrent protection module 200, and the collector of the second switching transistor Q2 is connected to the power supply load. One end of the second voltage divider resistor R3 is connected to both the driving terminal of the second switching transistor Q2 and the other end of the first voltage divider resistor R4, and the other end of the second voltage divider resistor R3 is connected to both the emitter of the second switching transistor Q2 and the output terminal of the overcurrent protection module 200.

[0034] In one embodiment, when the control signal is the drive power supply, the control signal is high level, the first switch Q1 is turned on, the first voltage divider resistor R4 is connected to ground, one end of the first voltage divider resistor R4 is pulled low to form a conduction signal, the first voltage divider resistor R4 and the second voltage divider resistor R3 divide the voltage, and the voltage difference across the second voltage divider resistor R3 causes the second switch Q2 to turn on. The drive power supply is output to the power supply load through the inactive overcurrent protection module 200 and the turned second switch Q2, and the power supply module 100 is connected to the power supply load to supply drive power.

[0035] In another embodiment, when the control signal is to stop power supply, the control signal is at a low level, the first switch Q1 is turned off, the first voltage divider resistor R4 is not connected to ground, forming a turn-off signal, the first voltage divider resistor R4 and the second voltage divider resistor R3 divide the voltage, the voltage difference across the second voltage divider resistor R3 is insufficient to turn on the second switch Q2, the second switch Q2 is turned off, the drive power cannot be output to the power supply load through the inactive overcurrent protection module 200 and the disconnected second switch Q2, and the drive power supply to the power supply load is stopped.

[0036] In this embodiment, both the first switch Q1 and the second switch Q2 can be MOSFETs, transistors, or high-frequency switches. No restrictions are placed on the type of switch in this embodiment.

[0037] Reference Figure 1 and Figure 2In some embodiments of this invention, the overcurrent protection module 200 includes a sampling unit 210 and an overcurrent control unit.

[0038] The input terminal of sampling unit 210 is connected to power module 100, and the output terminal of sampling unit 210 is connected to the power supply load through high-side drive module 300, that is, through the second switching transistor Q2. Sampling unit 210 can detect the current of drive power supply and obtain drive current.

[0039] The input terminal of the overcurrent control unit is connected to the output terminal of the sampling unit 210, and the output terminal of the overcurrent control unit is connected to the input terminal of the high-side drive module 300. The overcurrent control unit can determine whether the power supply load is in a short-circuit state based on the drive current, and control the on / off state of the drive power supply and the high-side drive module 300 based on the short-circuit result.

[0040] In this embodiment, the specific structure of the sampling unit 210 is not limited. It can be a single sampling resistor or multiple discrete components to form a sampling circuit unit.

[0041] Specifically, the overcurrent control unit includes: a second current-limiting resistor R5 and a third switching transistor Q3.

[0042] One end of the second current-limiting resistor R5 is connected to the sampling unit 210, and the other end of the second current-limiting resistor R5 is connected to the driving terminal of the third switch Q3. The emitter of the third switch Q3 is connected to the power supply module 100 and the sampling unit 210 respectively, and the collector of the third switch Q3 is connected to the high-side driving module 300, that is, connected to the driving terminal of the second switch Q2, the first voltage divider resistor R4 and the second voltage divider resistor R3 respectively.

[0043] In one embodiment, taking the sampling unit 210 with sampling resistor R6 as an example, the output current will abnormally increase due to the short circuit state of the power supply load. When the driving current sampled by the sampling unit 210 is too large, a sufficiently large voltage difference can be formed across the sampling unit 210, causing the third switch Q3 to conduct. When the third switch Q3 conducts, it is considered that the power supply load is in a short circuit state. The conduction of the third switch Q3 causes the voltage difference across the second voltage divider resistor R3 to decrease. The voltage difference across the second voltage divider resistor R3 is insufficient to turn on the second switch Q2, so the second switch Q2 is turned off. The driving power cannot be output to the power supply load through the activated overcurrent protection module 200 and the disconnected second switch Q2, thus stopping the supply of driving power to the power supply load.

[0044] When the second switch Q2 is turned off, no current flows through the sampling unit 210, so the third switch Q3 is not turned on and is turned off, causing the second switch Q2 to turn on again.

[0045] In this embodiment, the third switch Q3 can be a MOSFET, a transistor, or a high-frequency switch. No restrictions are placed on the type of switch in this embodiment.

[0046] It should be noted that initially, the second switch Q2 and the third switch Q3 operate in the switching region, alternately turning on and off, creating a hiccuping phenomenon. Based on the characteristics of the switches, eventually, the second switch Q2 and the third switch Q3 will balance and stabilize in the amplification region. The second switch Q2 is not simply in a switching state. This ensures that the second switch Q2 will not be damaged due to exceeding its rated power, thus achieving the overcurrent protection function during short circuits.

[0047] Under normal operating conditions, the current is small, and the voltage difference across the sampling unit 210 will not turn on the third switch Q3, so the overcurrent control unit remains inactive. In other words, the third switch Q3 does not work under normal conditions and remains inactive; it only turns on and becomes active under overcurrent conditions.

[0048] Reference Figure 1 and Figure 2 In some embodiments of this invention, the apparatus further includes a filtering module 500.

[0049] The input terminal of the filter module 500 is connected to the output terminal of the high-side drive module 300, and the output terminal of the filter module 500 is connected to the power supply load. The filter module 500 can perform rectification and filtering on the drive power supply to provide a more stable power supply to the power supply load.

[0050] The filter module 500 can be composed of a single filter capacitor and a single rectifier diode, or it can be composed of other discrete components. This application does not impose any restrictions on the filter module 500.

[0051] In some embodiments of another aspect of the present invention Figure 3 This is an optional flowchart of a driving method for the high-side drive circuit device for overcurrent protection provided in this application embodiment. The driving method for the high-side drive circuit device for overcurrent protection is applied to the high-side drive circuit device for overcurrent protection. Figure 3 The method may include, but is not limited to, steps S100 to S400.

[0052] In step S100, in response to the vehicle drive command, the control module generates a control signal according to the vehicle drive command and outputs the current control signal to the high-side drive module; wherein, the current control signal is the drive power supply signal.

[0053] In step S200, in response to the current control signal, the high-side drive module outputs the drive power to the power supply load.

[0054] In step S300, the drive current of the drive power supply is detected. Based on the drive current, the overcurrent protection module determines that the power supply load is in a short-circuit state, generates a shutdown signal, and outputs the shutdown signal to the high-side drive module.

[0055] In step S400, in response to the shutdown signal, the high-side drive module stops outputting drive power to the power supply load.

[0056] In this embodiment, the control module responds to vehicle drive commands, generates a control signal for drive power supply based on the vehicle drive commands, and sends the current control signal to the high-side drive module. The high-side drive module responds to the current control signal, turns on the power supply module and the power supply load, and supplies drive power to the power supply load.

[0057] Among them, the drive power supply signal is a high-level signal, that is, the current control signal is a high-level signal.

[0058] In one embodiment, the high-side drive module includes: a first current-limiting resistor, a first switching transistor, a first pull-down resistor, a first voltage divider resistor, a second voltage divider, and a second switching transistor. The control module responds to vehicle drive commands, generating a control signal for drive power supply based on the vehicle drive commands. This control signal is sent to the high-side drive module. When the control signal is high, the first switching transistor is turned on. The first voltage divider resistor is connected to ground, and pulling one end of the first voltage divider resistor low creates a conduction signal. The first and second voltage divider resistors divide the voltage, and the voltage difference across the second voltage divider resistor turns on the second switching transistor. The drive power supply is output to the power supply load through an inactive overcurrent protection module and the turned-on second switching transistor, thus connecting the power supply module to the power supply load and supplying drive power to the load.

[0059] The overcurrent protection module detects the drive current of the power supply. Based on the drive current, it determines that the power supply load is in a short-circuit state. The overcurrent protection module generates a shutdown signal and outputs the shutdown signal to the high-side drive module. The high-side drive module responds to the shutdown signal and stops outputting drive power to the power supply load.

[0060] In one embodiment, the overcurrent protection module includes a sampling unit and a third switching transistor. Because the power supply load is in a short-circuit state, the output current will abnormally increase. When the driving current sampled by the sampling unit is too large, a sufficiently large voltage difference can be formed across the sampling unit, causing the third switching transistor to conduct. When the third switching transistor is conducting, the power supply load is considered to be in a short-circuit state. The conduction of the third switching transistor causes the voltage difference across the second voltage divider resistor to decrease. The voltage difference across the second voltage divider resistor is insufficient to turn on the second switching transistor, causing it to turn off. The driving power cannot be output to the power supply load through the activated overcurrent protection module and the disconnected second switching transistor, thus stopping the supply of driving power to the power supply load.

[0061] In some embodiments of another aspect of the present invention, the driving method further includes: In response to the vehicle shutdown command, the S500 control module generates a control signal based on the vehicle shutdown command and outputs the current control signal to the high-side drive module; wherein, the current control signal is a power supply stop signal.

[0062] S600, in response to the current shutdown signal, the high-side drive module stops outputting drive power to the power supply load.

[0063] In this embodiment, the control module responds to the vehicle shutdown command by generating a control signal to stop power supply and sending the current control signal to the high-side drive module. The high-side drive module responds to the current control signal by not connecting the power module to the power supply load, thus stopping the supply of drive power.

[0064] In one embodiment, the high-side drive module includes: a first current-limiting resistor, a first switching transistor, a first pull-down resistor, a first voltage divider resistor, a second voltage divider, and a second switching transistor. The control module responds to vehicle drive commands, generating a control signal for drive power supply based on the vehicle drive commands. This control signal is sent to the high-side drive module. When the control signal is low, the first switching transistor is turned off. The first voltage divider resistor is not connected to ground, forming a turn-off signal. The first and second voltage divider resistors divide the voltage. The voltage difference across the second voltage divider resistor is insufficient to turn on the second switching transistor, causing it to turn off. The drive power supply cannot be output to the load through the inactive overcurrent protection module and the disconnected second switching transistor, thus stopping the supply of drive power to the load.

[0065] This application connects a control module to the input of a high-side drive module, outputting a control signal. Based on the control signal, the high-side drive module is switched on and off to achieve the drive function. The high-side drive module is connected to the power supply module through an overcurrent protection module. The overcurrent protection module detects the drive current of the power supply and controls the switching on and off of the power supply based on the drive current, thereby controlling the on / off state of the output drive power supply to the power supply load. This achieves the basic functions of high-side drive without relying on a dedicated high-side drive chip, but rather using discrete components. It can trigger shutdown protection in overcurrent scenarios, without relying on software monitoring and control. It has a fast response speed, is simpler, more efficient, more reliable, and lower in cost, and is not constrained by conditions such as chip procurement cycle.

[0066] This invention also provides a vehicle including the high-side drive circuit device for overcurrent protection described in the above embodiments.

[0067] The vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck. It can also be a commercial vehicle, such as a van, bus, small truck, or large semi-trailer. The vehicle must have an electric motor capable of outputting power or acting as a generator to store mechanical energy. When the vehicle is a new energy vehicle, it can be a hybrid or a pure electric vehicle.

[0068] Since the vehicle applies all the technical solutions of the above-mentioned device, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

Claims

1. A high-side drive circuit device for overcurrent protection, characterized in that, The circuit includes: Power module, the power module being used to provide drive power; An overcurrent protection module is provided, the input terminal of which is connected to the power supply module. The overcurrent protection module is used to detect the drive current of the drive power supply and determine the short circuit state based on the drive current in order to control the on / off state of the drive power supply. A high-side drive module, wherein the input terminal of the high-side drive module is connected to the output terminal of the overcurrent protection module, and the output terminal of the high-side drive module is connected to the power supply load, and the high-side drive module is used to output the drive power to the power supply load; A control module is connected to the input terminal of the high-side drive module. The control module is used to output a control signal and control the on / off state of the high-side drive module according to the control signal.

2. The high-side drive circuit device for overcurrent protection according to claim 1, characterized in that, The high-side driving module includes: A first driving unit, the driving end of the first driving unit is connected to the control module, and the first driving unit is used to output an on / off signal according to the control signal; The second drive unit has its drive end connected to the output end of the first drive unit, its input end connected to the output end of the overcurrent protection module, and its output end connected to the power supply load. The second drive unit is used to control the on / off state of the drive power supply and the power supply load according to the on / off signal.

3. The high-side drive circuit device for overcurrent protection according to claim 1, characterized in that, The overcurrent protection module includes: A sampling unit, the input terminal of which is connected to the power supply module, and the output terminal of which is connected to the power supply load through the high-side drive module, the sampling unit being used to acquire the drive current; An overcurrent control unit is provided, the input of which is connected to the output of the sampling unit, and the output of which is connected to the input of the high-side drive module. The overcurrent control unit is used to determine the short-circuit state based on the drive current in order to control the connection and disconnection between the drive power supply and the high-side drive module.

4. The high-side drive circuit device for overcurrent protection according to claim 2, characterized in that, The first driving unit includes: A first current-limiting resistor, one end of which is connected to the control module; The first switching transistor has its driving terminal connected to the other end of the first current-limiting resistor, its source connected to ground, and its drain connected to the driving terminal of the second driving unit. The first pull-down resistor has one end connected to the driving terminal of the first switching transistor, and the other end connected to ground.

5. The high-side drive circuit device for overcurrent protection according to claim 2, characterized in that, The second drive unit includes: The first voltage divider resistor, one end of which is connected to the output terminal of the first driving unit; The second switching transistor has its driving terminal connected to the other end of the first voltage divider resistor, its emitter connected to the output terminal of the overcurrent protection module, and its collector connected to the power supply load. The second voltage divider resistor has one end connected to the driving terminal of the second switching transistor and the other end of the first voltage divider resistor, and the other end connected to the emitter of the second switching transistor and the output terminal of the overcurrent protection module.

6. The high-side drive circuit device for overcurrent protection according to claim 3, characterized in that, The overcurrent control unit includes: A second current-limiting resistor, one end of which is connected to the sampling unit; The third switching transistor has its driving terminal connected to the other end of the second current-limiting resistor, its emitter connected to the power supply module and the sampling unit, and its collector connected to the high-side driving module.

7. The high-side drive circuit device for overcurrent protection according to claim 1, characterized in that, The device further includes a filtering module, the input of which is connected to the output of the high-side drive module, and the output of which is connected to the power supply load. The filtering module is used to rectify and filter the drive power supply.

8. A driving method for a high-side drive circuit device with overcurrent protection, characterized in that, The method, applied to a high-side drive circuit device for overcurrent protection according to any one of claims 1 to 7, comprises: In response to the vehicle drive command, the control module generates a control signal according to the vehicle drive command and outputs the current control signal to the high-side drive module; wherein, the current control signal is a drive power supply signal; In response to the aforementioned control signal, the high-side drive module outputs drive power to the power supply load; The drive current of the drive power supply is detected. Based on the drive current, the overcurrent protection module determines that the power supply load is in a short circuit state, generates a shutdown signal, and outputs the shutdown signal to the high-side drive module. In response to the shutdown signal, the high-side drive module stops outputting the drive power to the power supply load.

9. The driving method of the high-side drive circuit device for overcurrent protection according to claim 8, characterized in that, The method further includes: In response to a vehicle shutdown command, the control module generates a control signal based on the vehicle shutdown command and outputs the current control signal to the high-side drive module; wherein, the current control signal is a power supply stop signal; In response to the aforementioned shutdown signal, the high-side drive module stops outputting drive power to the power supply load.

10. A vehicle, characterized in that, A high-side drive circuit device comprising overcurrent protection as described in any one of claims 1 to 7.

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