A large-capacitance pre-charging control circuit, electronic device and vehicle

Abstract

The application discloses a large-capacitance pre-charging control circuit, electronic equipment and a vehicle. It belongs to the technical field of vehicles. It comprises a main power supply path, a gate switch module, a gate control module, a reference voltage generation module and an MCU. The main power supply path is used for charging a large-capacitance. The gate switch module is used for controlling the on-off of a first MOS tube and a second MOS tube after the end of the pre-charging process. The MCU is used for acquiring the voltage of the large-capacitance, outputting a corresponding pulse signal to the reference voltage generation module according to the voltage of the large-capacitance, and the reference voltage generation module is used for generating a corresponding reference voltage according to the pulse signal. The gate control module is used for controlling the gate voltage of the first MOS tube and the gate voltage of the second MOS tube according to the reference voltage during the pre-charging process, thereby controlling the pre-charging current. The application can adjust the pre-charging current in real time, and achieve the purpose of adjusting the pre-charging time.

Description

Technical Field

[0001] This invention belongs to the field of vehicle technology, specifically relating to a large capacitor pre-charge control circuit, electronic equipment, and vehicle. Background Technology

[0002] Intelligent electric chassis are key automotive components and a major focus of future automotive development, comprising three independent actuators: braking, steering, and suspension. Taking the braking system as an example, the intelligent braking control system includes mechanical-hydraulic components, algorithm control, and an electronic control unit, integrating functional modules such as motor drive, vehicle stability control, and dual-control electronic parking brake, capable of meeting the braking requirements of L3 and above vehicles. The electronic control unit serves as the link between algorithm control and mechanical-hydraulic components, containing key module circuits for power management, motor drive, valve actuation, and signal processing.

[0003] For power supply filtering in motor drives, a large capacitor needs to be connected in parallel on the power supply line to improve power stability and circuit reliability. However, a current surge can occur during the charging process of the large capacitor. The traditional solution is to add a switching transistor or relay to pre-charge the large capacitor and reduce or eliminate the current surge.

[0004] Traditional pre-charge devices can pre-charge the capacitor and eliminate inrush current, but the charging current is not adjustable and the charging speed gradually decreases during the charging process. When fast charging is required, traditional pre-charge devices cannot meet the requirements. Summary of the Invention

[0005] One object of the present invention is to provide a large capacitor precharge control circuit, electronic device and vehicle that can solve the technical problem of non-adjustable charging current in the prior art.

[0006] According to a first aspect of the present invention, a large capacitor precharge control circuit is provided, comprising: a main power supply path, a gate switch module, a gate control module, a reference voltage generation module, and an MCU;

[0007] The main power supply path includes a first MOSFET and a second MOSFET, and the main power supply path is used to charge the large capacitor.

[0008] The first GPIO interface of the MCU is connected to the gate control module and is used to control the conduction state of the gate control module;

[0009] The second GPIO interface of the MCU is connected to the gate switch module and is used to control the conduction state of the gate switch module;

[0010] The sampling interface of the MCU is connected to the main power supply path and is used to obtain the voltage of the large capacitor;

[0011] The PWM interface of the MCU is connected to the reference voltage generation module and is used to output a corresponding pulse signal to the reference voltage generation module according to the voltage of the large capacitor. The reference voltage generation module is used to generate a corresponding reference voltage according to the pulse signal.

[0012] The gate control module is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, and the gate control module is connected to the reference voltage generation module. The gate control module is used to control the gate voltage of the first MOS transistor and the gate voltage of the second MOS transistor according to the reference voltage during the pre-charge process.

[0013] The gate switch module is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, and is used to control the on / off state of the first MOS transistor and the second MOS transistor after the pre-charge process is completed.

[0014] Optionally, the source of the first MOSFET is connected to the source of the second MOSFET, the drain of the first MOSFET is connected to the battery via a fuse, and the drain of the second MOSFET is connected to the large capacitor via an inductor.

[0015] Optionally, the gate switch module includes a first transistor, a second transistor, and a first resistor;

[0016] The first end of the first resistor is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, respectively, and the second end of the first resistor is connected to the collector of the first transistor.

[0017] The base of the first transistor is connected to the collector of the second transistor, and the emitter of the first transistor is connected to the power supply.

[0018] The base of the second transistor is connected to the second GPIO interface of the MCU, and the emitter of the second transistor is grounded.

[0019] Optionally, the first transistor is a PNP transistor, and the second transistor is an NPN transistor.

[0020] Optionally, the gate control module includes a second resistor, a third resistor, a third transistor, a fourth transistor, and a Zener diode;

[0021] The first end of the second resistor is connected to the reference voltage generation module, and the second end of the second resistor is connected to the first end of the third resistor via the Zener diode;

[0022] The first end of the third resistor is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, the second end of the third resistor is connected to the collector of the third transistor, the emitter of the third transistor is connected to the power supply, and the base of the third transistor is connected to the collector of the fourth transistor.

[0023] The base of the fourth transistor is connected to the first GPIO interface of the MCU, and the emitter of the fourth transistor is grounded.

[0024] Optionally, the third transistor is a PNP transistor, and the fourth transistor is an NPN transistor.

[0025] Optionally, the reference voltage generation module includes a fourth resistor, a fifth resistor, and a seventh capacitor;

[0026] The first end of the fourth resistor is connected to the PWM interface of the MCU, the second end of the fourth resistor is connected to the first end of the second resistor, the first end of the fifth resistor and the first end of the seventh capacitor, and the second end of the fifth resistor and the second end of the seventh capacitor are grounded.

[0027] Optionally, the large capacitor comprises six capacitors connected in parallel.

[0028] According to a second aspect of the present invention, an electronic device is provided, comprising a large capacitor precharge control circuit as described in the first aspect of the present invention.

[0029] According to a third aspect of the present invention, a vehicle is provided, including an electronic device as described in the second aspect of the present invention.

[0030] The beneficial effects of this invention are as follows: This invention can adjust the pre-charge current in real time to achieve the purpose of adjusting the pre-charge time and improving system startup time. The circuit of this invention is flexible in application; by matching different component parameters, it can adapt to different usage scenarios. This invention uses transistors, Zener diodes, resistors, and capacitors to build the circuit, utilizing the existing switching transistors on the controller, achieving large capacitor pre-charging without increasing costs excessively, and requiring few and small additional components, thus not occupying too much PCB board space. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a large capacitor filter.

[0032] Figure 2 This is a schematic diagram of a pre-charging device in the prior art.

[0033] Figure 3 This is a schematic diagram of a large capacitor pre-charge control circuit according to the present invention. Detailed Implementation

[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0035] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0036] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0038] In the specification of this invention, the terms "first" and "second" may explicitly or implicitly include one or more of the same feature. In the description of this invention, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0039] like Figure 1 As shown, for power supply filtering of motor drive, a large capacitor needs to be connected in parallel on the power supply line to improve power supply stability and circuit reliability.

[0040] Under initial conditions, the power input is 0 and the capacitor charge is 0. When the power is connected, due to the capacitor's own charging characteristics, the capacitor is equivalent to a momentary short circuit at the instant the power is connected, resulting in a large current surge, which reduces the lifespan of the power devices in front of the capacitor or damages the power devices.

[0041] like Figure 2 As shown, to address the current surge issue during large capacitor charging when power is connected, the traditional solution is to add a switching transistor or relay to pre-charge the large capacitor, thereby reducing or eliminating the current surge. Taking a relay as an example, initially, the FET3 switch is off, and the capacitor has no charge. During pre-charging, the relay K1 coil is energized, the switch SW1 is closed, and the power supply BAT charges the capacitor through SW1, the current-limiting resistor R6, the switching transistor FET4, and the inductor L2. The charging current is limited by the current-limiting resistor R6, preventing current surges.

[0042] Traditional pre-charging devices can pre-charge the capacitor and eliminate inrush current, but they have the following drawbacks:

[0043] (1) The charging current is not adjustable and the charging speed gradually decreases during the charging process. When fast charging is required, the traditional pre-charging device cannot meet the requirements.

[0044] (2) The FET3 switch may turn on before the relay, which cannot achieve hardware error prevention. When the FET3 turns on before the relay, the power supply directly charges the capacitor without the current limiting device, and the capacitor is short-circuited instantly, resulting in a large current surge.

[0045] (3) Relays or newly added switching transistors are expensive. All major vehicle manufacturers are seeking to reduce the cost of parts. Relays will increase the cost of the current electronic control unit.

[0046] (4) Relays have a large space, and lightweighting and miniaturization are the directions pursued by automotive parts. Relays will occupy the layout space of the electronic control unit, and may meet the space requirements at the expense of performance.

[0047] like Figure 3 As shown, this embodiment introduces a large capacitor precharge control circuit, including: a main power supply path, a gate switch module, a gate control module, a reference voltage generation module, and an MCU (Microcontroller Unit).

[0048] The main power supply path includes a first MOSFET and a second MOSFET, and the main power supply path is used to charge the large capacitor.

[0049] The first GPIO (General Purpose Input Output) interface of the MCU is connected to the gate control module and is used to control the conduction state of the gate control module.

[0050] The second GPIO interface of the MCU is connected to the gate switch module and is used to control the conduction state of the gate switch module.

[0051] The MCU's sampling interface is connected to the main power supply path and is used to obtain the voltage of the large capacitor.

[0052] The PWM (Pulse Width Modulation) interface of the MCU is connected to the reference voltage generation module and is used to output a corresponding pulse signal to the reference voltage generation module according to the voltage of the large capacitor. The reference voltage generation module is used to generate a corresponding reference voltage according to the pulse signal.

[0053] The gate control module is connected to the gate of the first MOS transistor and the gate of the second MOS transistor. The gate control module is also connected to the reference voltage generation module. The gate control module is used to control the gate voltage of the first MOS transistor and the gate voltage of the second MOS transistor according to the reference voltage during the pre-charge process.

[0054] The gate switch module is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, and is used to control the on / off state of the first MOS transistor and the second MOS transistor after the pre-charge process is completed.

[0055] This scheme utilizes the characteristic of a MOS (metal-oxide-semiconductor) transistor operating in the saturation region. When the gate-source voltage difference Vgs of the MOS transistor is greater than the turn-on voltage Vth, and the drain-source voltage difference Vds is greater than Vgs-Vth, the drain current Id is independent of Vds and determined by Vgs. Therefore, the voltage between the gate and source of MOS switches FET1 and FET2 in the power supply path can be controlled, thereby controlling the current flowing through FET1 and FET2, and thus achieving the purpose of controlling the precharge current. Figure 3 As shown, the power supply path includes a first MOSFET FET1 and a second MOSFET FET2.

[0056] During the pre-charge process, the MCU monitors the voltage of the large capacitor in real time and outputs a corresponding pulse signal to the reference voltage generation module based on the voltage of the large capacitor. This adjusts the reference voltage generated by the reference voltage generation module and controls the gate voltage of the MOS switch in the power supply path through the gate control module, thereby controlling the pre-charge current.

[0057] During the pre-charge process, the MCU controls the gate control module to turn on and simultaneously controls the gate switch module to turn off, allowing the gate control module to control the gate voltage of the first MOSFET FET1 and the second MOSFET FET2, thereby controlling the pre-charge current.

[0058] After the pre-charge process is completed, the MCU controls the gate control module to turn off and turns on the gate switch module. The gate switch module turns on the first MOSFET FET1 and the second MOSFET FET2, allowing the power supply path to work normally.

[0059] Specifically, the MCU's first and second GPIO interfaces can output high or low levels. When a high level is output, the corresponding module is turned on. When a low level is output, the corresponding module is turned off.

[0060] During the pre-charge process, the MCU's first GPIO interface outputs a high level, turning on the gate control module. Simultaneously, during the pre-charge process, the MCU's second GPIO interface outputs a low level, turning off the gate switching module.

[0061] After pre-charging is complete, the MCU's first GPIO interface outputs a low level, turning off the gate control module. Simultaneously, after pre-charging is complete, the MCU's second GPIO interface outputs a high level, turning on the gate switching module.

[0062] In this embodiment, the source of the first MOSFET FET1 is connected to the source of the second MOSFET FET2, the drain of the first MOSFET FET1 is connected to the battery via a fuse Fuse1, and the drain of the second MOSFET FET2 is connected to the large capacitor via an inductor L1. Figure 3 As shown, the large capacitor includes six capacitors C1-C6 connected in parallel.

[0063] like Figure 3 As shown, in this embodiment, the gate switch module includes a first transistor Q1, a second transistor Q2, and a first resistor R1.

[0064] The first end of the first resistor R1 is connected to the gate of the first MOSFET FET1 and the gate of the second MOSFET FET2, respectively. The second end of the first resistor R1 is connected to the collector of the first transistor Q1. The base of the first transistor Q1 is connected to the collector of the second transistor Q2, and the emitter of the first transistor Q1 is connected to the power supply VCP. The base of the second transistor Q2 is connected to the second GPIO interface of the MCU, and the emitter of the second transistor Q2 is grounded.

[0065] The first transistor Q1 is a PNP transistor, and the second transistor Q2 is an NPN transistor.

[0066] like Figure 3 As shown, the second GPIO interface of the MCU is... Figure 3 The GPIO2 interface of the MCU can output a high or low level. During the precharge process, the MCU's GPIO2 interface outputs a low level, and the first transistor Q1 and the second transistor Q2 are turned off. After the precharge process is completed, the MCU's GPIO2 interface outputs a high level, and the first transistor Q1 and the second transistor Q2 are turned on, providing a turn-on voltage to the first MOSFET FET1 and the second MOSFET FET2.

[0067] like Figure 3 As shown, in this embodiment, the gate control module includes a second resistor R2, a third resistor R3, a third transistor Q3, a fourth transistor Q4, and a Zener diode Z1.

[0068] The first end of the second resistor R2 is connected to the reference voltage generation module, and the second end of the second resistor R2 is connected to the first end of the third resistor R3 via the Zener diode Z1.

[0069] The first end of the third resistor R3 is connected to the gate of the first MOSFET FET1 and the gate of the second MOSFET FET2, respectively. The second end of the third resistor R3 is connected to the collector of the third transistor Q3. The emitter of the third transistor Q3 is connected to the power supply VCP. The base of the third transistor Q3 is connected to the collector of the fourth transistor Q4.

[0070] The base of the fourth transistor Q4 is connected to the first GPIO interface of the MCU, and the emitter of the fourth transistor Q4 is grounded.

[0071] The third transistor Q3 is a PNP transistor, and the fourth transistor Q4 is an NPN transistor.

[0072] like Figure 3 As shown, the voltage at the first end of the second resistor R2 is the reference voltage Vref, the voltage regulation voltage of the Zener diode Z1 is Vz1, and the gate voltage of the first MOSFET FET1 and the second MOSFET FET2 is Vg. When the third transistor Q3 and the fourth transistor Q4 are turned on, the gate voltage of the first MOSFET FET1 and the second MOSFET FET2 can be calculated as Vg = (R2*VCP + R3*Vz1 + R3*Vref) / (R2 + R3).

[0073] In the initial state, the MCU's GPIO1 and GPIO2 interfaces output a low level, the MCU's PWM interface outputs a low level, the MCU detects that the V12M voltage is 0V through the ADC interface, the first transistor Q1 and the second transistor Q2 are turned off, the third transistor Q3 and the fourth transistor Q4 are turned off, and at this time the first MOSFET FET1 and the second MOSFET FET2 are turned off.

[0074] Once the pre-charge process begins, the MCU's GPIO1 interface outputs a high level, and the third transistor Q3 and the fourth transistor Q4 are turned on. At this time, the gate voltage Vg can be calculated according to the above formula.

[0075] The MCU monitors the voltage of the large capacitor, V12M, in real time via the ADC interface. Based on different FET (Field Effect Transistor) parameters and varying charging current requirements, the MCU adjusts the duty cycle of its PWM output in real time. This adjusts the reference voltage Vref, thereby controlling the gate voltage Vg, which in turn controls the Vgs voltage of FET1 and FET2, ultimately controlling the current flowing through FET1 and FET2, and consequently, the charging current of C1-C6.

[0076] Based on the above formula for calculating the gate voltage Vg, this solution can be adapted to different application scenarios by matching different parameters. For example, adjusting the resistance values ​​of the second resistor R2 and the third resistor R3 can also adjust the regulated voltage Vz1 of the Zener diode Z1.

[0077] Since the MCU monitors the large capacitor voltage in real time via the ADC interface, it can determine whether to end the pre-charge based on the large capacitor voltage. When the large capacitor voltage reaches the set threshold voltage, the pre-charge ends, the MCU's GPIO1 interface outputs a low level, turning off the third transistor Q3 and the fourth transistor Q4. At the same time, the MCU's GPIO2 interface outputs a high level, turning on the first transistor Q1 and the second transistor Q2, providing the turn-on voltage to the first MOSFET FET1 and the second MOSFET FET2.

[0078] In this embodiment, the reference voltage generation module includes a fourth resistor R4, a fifth resistor R5, and a seventh capacitor C7. The first terminal of the fourth resistor R4 is connected to the PWM interface of the MCU, and the second terminal of the fourth resistor R4 is connected to the first terminal of the second resistor R2, the first terminal of the fifth resistor R5, and the first terminal of the seventh capacitor C7. The second terminals of the fifth resistor R5 and the second terminal of the seventh capacitor C7 are grounded.

[0079] The circuit of this invention is flexible in application and can be adapted to different usage scenarios by matching different component parameters. This invention uses transistors, Zener diodes, resistors, and capacitors to build the circuit, and utilizes the existing switching transistors on the controller to achieve large capacitor pre-charging without increasing costs. Moreover, the added components are few and small, and do not occupy too much PCB (Printed Circuit Board) space.

[0080] This embodiment describes an electronic device, including a large capacitor pre-charge control circuit as described in any embodiment of the present invention.

[0081] This embodiment describes a vehicle that includes an electronic device as described in the above embodiments of the present invention.

[0082] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention.

[0083] Those skilled in the art will recognize that the modules and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0084] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described apparatus and equipment can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0085] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0086] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of the embodiments of the present invention, depending on actual needs.

[0087] In addition, the functional modules in the embodiments of the present invention can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0088] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0089] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0090] It should be understood that the sequence numbers of the steps in the invention's content and embodiments do not absolutely imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The foregoing description of embodiments of this disclosure has been provided for illustrative and descriptive purposes. The foregoing description is not exhaustive and is not intended to limit this disclosure to the exact form disclosed. Various modifications and variations may exist based on the foregoing teachings, or various modifications and variations may be derived from the practice of this disclosure. These embodiments were chosen and described to illustrate the principles of this disclosure and its practical application, so that those skilled in the art can utilize this disclosure in various implementations and modifications suitable for the specific purpose of the concept.

Claims

1. A large capacitor pre-charge control circuit, characterized in that, include: Main power supply path, gate switch module, gate control module, reference voltage generation module, and MCU; The main power supply path includes a first MOSFET and a second MOSFET, and the main power supply path is used to charge the large capacitor. The first GPIO interface of the MCU is connected to the gate control module and is used to control the conduction state of the gate control module; The second GPIO interface of the MCU is connected to the gate switch module and is used to control the conduction state of the gate switch module; The sampling interface of the MCU is connected to the main power supply path and is used to obtain the voltage of the large capacitor; The PWM interface of the MCU is connected to the reference voltage generation module and is used to output a corresponding pulse signal to the reference voltage generation module according to the voltage of the large capacitor. The reference voltage generation module is used to generate a corresponding reference voltage according to the pulse signal. The gate control module is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, and the gate control module is connected to the reference voltage generation module. The gate control module is used to control the gate voltage of the first MOS transistor and the gate voltage of the second MOS transistor according to the reference voltage during the pre-charge process. The gate switch module is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, and is used to control the on / off state of the first MOS transistor and the second MOS transistor after the pre-charge process is completed.

2. The large capacitor pre-charge control circuit according to claim 1, characterized in that, The source of the first MOSFET is connected to the source of the second MOSFET, the drain of the first MOSFET is connected to the battery via a fuse, and the drain of the second MOSFET is connected to the large capacitor via an inductor.

3. The large capacitor pre-charge control circuit according to claim 1, characterized in that, The gate switch module includes a first transistor, a second transistor, and a first resistor; The first end of the first resistor is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, respectively, and the second end of the first resistor is connected to the collector of the first transistor. The base of the first transistor is connected to the collector of the second transistor, and the emitter of the first transistor is connected to the power supply. The base of the second transistor is connected to the second GPIO interface of the MCU, and the emitter of the second transistor is grounded.

4. The large capacitor pre-charge control circuit according to claim 3, characterized in that, The first transistor is a PNP transistor, and the second transistor is an NPN transistor.

5. The large capacitor pre-charge control circuit according to claim 1, characterized in that, The gate control module includes a second resistor, a third resistor, a third transistor, a fourth transistor, and a Zener diode; The first end of the second resistor is connected to the reference voltage generation module, and the second end of the second resistor is connected to the first end of the third resistor via the Zener diode; The first end of the third resistor is connected to the gate of the first MOS transistor and the gate of the second MOS transistor, the second end of the third resistor is connected to the collector of the third transistor, the emitter of the third transistor is connected to the power supply, and the base of the third transistor is connected to the collector of the fourth transistor. The base of the fourth transistor is connected to the first GPIO interface of the MCU, and the emitter of the fourth transistor is grounded.

6. The large capacitor pre-charge control circuit according to claim 5, characterized in that, The third transistor is a PNP transistor, and the fourth transistor is an NPN transistor.

7. A large capacitor pre-charge control circuit according to claim 5, characterized in that, The reference voltage generation module includes a fourth resistor, a fifth resistor, and a seventh capacitor; The first end of the fourth resistor is connected to the PWM interface of the MCU, the second end of the fourth resistor is connected to the first end of the second resistor, the first end of the fifth resistor and the first end of the seventh capacitor, and the second end of the fifth resistor and the second end of the seventh capacitor are grounded.

8. The large capacitor pre-charge control circuit according to claim 1, characterized in that, The large capacitor comprises six capacitors connected in parallel.

9. An electronic device, characterized in that, Includes a large capacitor precharge control circuit as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes an electronic device as described in claim 9.

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