Intelligent high-voltage power distribution device and power distribution method

Abstract

The application relates to an intelligent high-voltage power distribution device, which comprises a mechanical shell and driving plate modules, a mother plate module, a control plate module, a contactor switching plate module, a collection control plate module, a voltage collection plate module, a contactor combination module and an insulation monitoring module arranged in the mechanical shell; the application can not only monitor the power supply output state and voltage, current parameters and other information of each power equipment, but also can timely grasp the operation condition of the power equipment, realizes relatively complicated high-voltage power distribution logic control, satisfies the intelligent management demand of multi-path high-voltage power distribution, can monitor the operation state of the power equipment and provide overcurrent and overvoltage protection and other functions, can report the state and fault alarm information through a bus, and guarantees the reliable work of the power equipment.

Description

Technical Field

[0001] This invention belongs to the field of intelligent power distribution technology, specifically relating to an intelligent high-voltage power distribution device and power distribution method for use in heavy-duty vehicles. Background Technology

[0002] In recent years, with the development of information technology in special vehicles, the requirements for electrification and intelligence of special vehicles have become increasingly higher, and the power supply needs of various controllers and actuators have become increasingly complex. At present, the high-voltage power distribution devices of special vehicles rely on external electrical control units for control, which cannot guarantee the correctness of control, cannot monitor the status of devices such as relay boxes and fuses in real time, cannot provide timely alarms, have many high and low voltage wiring harnesses inside, are irregularly distributed, are messy inside, and cannot achieve high and low voltage separation. At the same time, the structure of the high-voltage power distribution device is relatively simple, making it difficult to implement more complex logic control and manage high-voltage power distribution branches, thus failing to meet the needs of intelligent power distribution management. Summary of the Invention

[0003] This invention provides an intelligent high-voltage power distribution device and method. The technical problem to be solved is that it can not only monitor the power supply output status and voltage and current parameters of each electrical device, but also keep track of the operating status of the electrical devices in a timely manner, realize relatively complex high-voltage power distribution logic control, and meet the needs of intelligent management of multi-channel high-voltage power distribution.

[0004] To address the above technical problems, this invention provides an intelligent high-voltage power distribution device, characterized by comprising a drive board module, a motherboard module, a control board module, a contactor adapter board module, a data acquisition and control board module, a voltage acquisition board module, a contactor combination module, and an insulation monitoring module. The motherboard module provides power supply and conversion interfaces for the drive board module and the control board module. The control board module enables bus communication, current and voltage monitoring, and sequential power distribution and protection of high-voltage components. The contactor adapter board module provides connection interfaces for the drive board module and the contactor combination module. The data acquisition and control board module is used for data acquisition and processing of the voltage acquisition board module and the current sensor, maintaining a correct linear relationship between DC signal input and output. The voltage acquisition board module is used for high-voltage acquisition and conversion. The contactor combination module is used for power distribution, current and voltage monitoring, and protection of high-voltage components.

[0005] A power distribution method based on an intelligent high-voltage power distribution device is characterized by: power distribution control through a contactor combination module, the control strategy of which includes the following steps:

[0006] When the voltage of the supercapacitor is lower than the voltage of the power battery, the voltage output by the power battery passes through 500A fuse 1, contactor J1, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J8, and 500A fuse 2, and is finally output to the supercapacitor terminal to execute the Buck constant current charging of the circuit, thereby realizing the fast charging of the supercapacitor.

[0007] When the voltage of the supercapacitor is greater than the voltage of the power battery but less than the bus voltage of 900V, the voltage output by the power battery passes through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, and 500A fuse 2, and finally flows into the supercapacitor terminal to execute the constant current charging of the circuit, thereby realizing the boost charging of the supercapacitor to 900V.

[0008] When the supercapacitor voltage is equal to 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, and finally flows into the 1-3 bridge motor driver to execute the constant voltage discharge of the Bus circuit, achieving a constant voltage output of 900V on the bus.

[0009] When the bus voltage is 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, contactor J5, and contactor J10, and finally flows into the generator range extender controller to perform pre-charging of the generator controller and realize the generator start-up.

[0010] When the bus voltage is 900V and the engine is started, the engine, power battery, 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, contactor J5, contactor J10, and contactor J9 form an enhanced hybrid power circuit to realize the hybrid power distribution mode of special vehicles.

[0011] The control strategy of the contactor combination module has two steps as follows:

[0012] When the power battery voltage is 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J1, contactor J4, contactor J5, and contactor J10, and finally flows into the generator range extender controller to perform pre-charging of the generator controller and realize the start of the generator.

[0013] When the power battery voltage is 900V and the engine is started, the engine, power battery, 500A fuse 1, contactor J1, contactor J4, contactor J5, contactor J10, and contactor J9 form a simple hybrid power circuit, realizing a simple power distribution mode for special vehicles.

[0014] Beneficial effects: This invention can not only monitor the power supply output status and voltage and current parameters of various electrical devices, but also keep track of the operating status of electrical devices in a timely manner, realize relatively complex high-voltage power distribution logic control, and meet the needs of intelligent management of multi-channel high-voltage power distribution.

[0015] This invention features a simple structure and convenient control. By receiving bus control commands, it controls high-voltage contactors to achieve sequential power distribution and protection for high-voltage components such as the vehicle's first-axle hub drive motor, second-axle hub drive motor, third-axle hub drive motor, hub motor cooling electric pump, water pump and fan, and DC900 / DC28 power converter. It also enables the vehicle to connect to the grid, including the high-voltage generator controller, power battery, supercapacitor, and bidirectional DC-DC converter. Simultaneously, it can monitor the operating status of electrical equipment and provide overcurrent and overvoltage protection functions. Furthermore, it can report status and fault alarm information via the bus, ensuring the reliable operation of the electrical equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the electrical principle of the system of the present invention.

[0017] Figure 2 This is a schematic diagram of the contactor combination module of the present invention.

[0018] Figure 3 This is a schematic diagram of the control board module unit of the present invention.

[0019] Figure 4 This is a schematic diagram of the motherboard module of the present invention.

[0020] Figure 5 This is a schematic diagram of the data acquisition and control board module of the present invention.

[0021] Figure 6 This is a schematic diagram of the voltage acquisition board module of the present invention. Detailed Implementation

[0022] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below.

[0023] The present invention proposes an intelligent high-voltage power distribution device, comprising a mechanical housing and a drive board module, a motherboard module, a control board module, a contactor adapter board module, a data acquisition and control board module, a voltage acquisition board module, a contactor combination module, and an insulation monitoring module disposed within the mechanical housing;

[0024] The drive board module, motherboard module, and control board module are all located in the low-pressure compartment, while the contactor adapter board module, data acquisition and control board module, voltage acquisition board module, contactor combination module, and insulation monitoring module are located in the high-pressure compartment. The low-pressure compartment and the high-pressure compartment are connected by two through-wall aviation connectors.

[0025] The driver board module consists of 12 driver channels. Each driver channel uses opto-isolation and push-pull output circuits to drive PMOS transistors to control the on / off state of the contactor. Opto-isolation is achieved through optocouplers to isolate signals, and the push-pull output circuit can improve the current driving capability.

[0026] The motherboard module consists of a 24V to 12V power conversion circuit, a 24V to 5V power conversion circuit, a 5V to 3.3V linear power supply circuit, a 10-channel IO output drive circuit, and a 24-channel acquisition and conditioning circuit. It mainly provides power supply and conversion interfaces for the driver board module and the control board module.

[0027] The control board module consists of an MCU, a 12-channel AD acquisition circuit, a 22-channel IO output circuit, a 22-channel IO input circuit, an RS232 integrated circuit, a CAN integrated circuit I, a CAN integrated circuit II, and a power supply integrated circuit. It mainly realizes the bus communication for high-voltage distribution boxes, current and voltage monitoring, and the sequential power distribution and protection of high-voltage components.

[0028] The contactor adapter board module consists of 12 drive relay interfaces, mainly providing connection interfaces for the drive board module and the contactor combination module.

[0029] The data acquisition and control board module consists of a 24V to 5V power conversion circuit, a 24V to ±15V power conversion circuit, and a 12-channel analog acquisition conversion isolation circuit. It is mainly responsible for the data acquisition and processing of the voltage acquisition board module and the current sensor, and maintaining the correct linear relationship between DC signal input and output.

[0030] The voltage acquisition board module consists of 6 high-voltage acquisition circuits and leakage current detection circuits, and is mainly responsible for the acquisition and conversion of high voltage.

[0031] The contactor combination module consists of 400A contactors J1-J10, 150A contactors J11-J12, 50A fuse 1, 50A fuse 2, 500A fuse 1, 500A fuse 2, gold resistor 1, gold resistor 2, and current sensors 1-7; it mainly realizes the power distribution strategy, current and voltage monitoring and protection of high-voltage components.

[0032] The system power supply and control interface connector is connected to the motherboard module CY1 interface. It is mainly used for the low-voltage system power supply of the high-voltage distribution box, the status output of power distribution request and power distribution completion instructions, and the reception and forwarding of system CAN information data.

[0033] The precharge control interface connector signal is connected sequentially through the motherboard module CY2 interface, control board module, drive board module, CY4 interface, through-wall connector 2, contactor adapter board template, contactor combination module, and wiring compartment 2. It is mainly used to control the precharge of the 1-3 bridge motor driver and collect the precharge completion status, while controlling the power distribution of the 1-3 bridge motor driver and auxiliary load equipment.

[0034] The DC / DC power supply and control interface connector is connected to the motherboard module CY2 interface, control board module, drive board module, CY4 interface, through-wall connector 2, contactor adapter board template, contactor combination module, and wiring compartment. It mainly performs charging logic processing for high-power DC-DC, power battery, and supercapacitor, as well as CAN bus data communication for high-power DC-DC.

[0035] The FlexRay bus interface connector is connected to the CY2 interface of the motherboard module and the control board module. It is mainly used to receive control commands from the vehicle terminal and send data such as current and voltage of the high-voltage distribution box.

[0036] The debugging interface connector connects to the CY3 interface of the motherboard module and the control board module, and is mainly used for program downloading and debugging of the control board module.

[0037] The third wiring compartment is connected to the contactor combination module and is mainly responsible for providing the 900V power supply to the contactor combination module and controlling the power distribution of the water pump fan and resistors.

[0038] The vehicle terminal sends a power distribution request command through the FlexRay bus interface connector, which then reaches the control board module through the CY2 interface of the motherboard module. After receiving the power distribution request command, the control board module outputs it through the driver board module, which then passes through the through-wall connector 2 and the contactor adapter module to reach the contactor combination module. The contactor combination module outputs the power to the wiring compartment 1 and wiring compartment 2 through the high-voltage power distribution strategy, thus completing the power-on of the high-voltage electrical equipment.

[0039] After the contactor combination module completes power distribution, the load's operating voltage is converted from high voltage to 0-4.5V analog voltage by the voltage acquisition board module. The acquisition control board module transmits the 0-4.5V analog voltage to the control board module for processing through a subtraction operational amplifier isolation circuit. The control board module then sends the processed voltage data to the flexray bus interface connector through the CY2 interface of the motherboard module.

[0040] After the contactor combination module completes power distribution, the load's operating current is directly transmitted from the 0-4.5V analog voltage to the control board module via the acquisition and control board module through the subtraction operational amplifier isolation circuit. The control board module then sends the processed voltage data to the flexray bus interface connector via the CY2 interface of the motherboard module.

[0041] High-power DC / DC operating mode data is sent to the control board module via the CAN connector of the DC / DC power supply and control interface. The control board module reads the data from the CAN receive buffer via the MCU, converts the data into a level signal according to the bus protocol, and controls the output of the drive board module through the level signal. The output signal is connected to the contactor combination module to complete the power distribution of the high-voltage load equipment.

[0042] like Figure 2 As shown, when the intelligent high-voltage power distribution device is in pre-charge mode, the control board module drives the relay of the motherboard module through IO signals, outputting a high-level signal to the pre-charge control interface connector through the CY2 interface of the motherboard module. The 1-3 bridge motor driver receives the high level and begins pre-charge. After the driver completes pre-charge, the 1-3 bridge motor driver outputs a high level. The high level output by the 1-3 bridge motor driver flows into the CY2 interface of the motherboard module through the pre-charge control interface connector. After the control board module receives the high-level data from the CY2 interface, it converts the level data into CAN bus data and sends it to the vehicle terminal. This realizes the function of controlling the pre-charge of the 1-3 bridge motor driver and collecting the pre-charge completion status.

[0043] like Figure 2 As shown, the insulation monitoring module's CAN bus connects to the motherboard module's CY5 interface via the acquisition control board module and through-wall connector 1. When the control board module receives CAN bus data from the insulation monitoring module via the CY5 interface, it processes the data using the CAN-to-Flexray conversion and then sends the data to the vehicle terminal for display. This enables real-time monitoring of insulation data under high-voltage conditions and ensures personnel safety.

[0044] like Figure 2-3 As shown, when the vehicle terminal sends a power distribution request command for "enhanced hybrid mode", the command signal enters through the FlexRay bus interface connector, reaches the control board module through the CY2 interface of the motherboard module, and after receiving the power distribution request command, the control board module outputs it through the drive board module, passes through the through-wall connector 2 and the contactor adapter module, and reaches the contactor combination module. Through the control strategy 1 of the contactor combination module, the wiring compartment 1 and wiring compartment 2 are output to complete the power-on of the high-voltage electrical equipment.

[0045] A smart high-voltage power distribution method based on a smart high-voltage power distribution device includes the following steps:

[0046] Control strategy 1 for contactor combination module:

[0047] When the voltage of the supercapacitor is lower than the voltage of the power battery, the voltage output from the power battery passes through 500A fuse 1, contactor J1, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J8, and 500A fuse 2, and is finally output to the supercapacitor terminal to execute the Buck constant current charging of the circuit, thereby realizing the rapid charging of the supercapacitor.

[0048] When the voltage of the supercapacitor is greater than the voltage of the power battery but less than the bus voltage of 900V, the voltage output from the power battery flows through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, and 500A fuse 2, and finally flows to the supercapacitor terminal to execute the constant current charging of the circuit, thereby realizing the boost charging of the supercapacitor to 900V.

[0049] When the supercapacitor voltage is equal to 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, and finally flows into the 1-3 bridge motor driver to execute the constant voltage discharge of the Bus circuit, achieving a constant voltage output of 900V from the bus.

[0050] When the bus voltage is 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, contactor J5, and contactor J10, and finally flows into the generator range extender controller to perform pre-charging of the generator controller and realize the generator start-up.

[0051] When the bus voltage is 900V and the engine is started, the engine, power battery, 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, contactor J5, contactor J10, and contactor J9 form an enhanced hybrid power circuit to realize the hybrid power distribution mode of special vehicles.

[0052] like Figure 2-3As shown, when the vehicle terminal sends a power distribution request command for "simple hybrid mode", the command signal enters through the FlexRay bus interface connector, reaches the control board module through the CY2 interface of the motherboard module, and after receiving the power distribution request command, the control board module outputs through the drive board module, passes through the through-wall connector 2 and the contactor adapter module, and reaches the contactor combination module. Through the control strategy 2 of the contactor combination module, the wiring compartment 1 and wiring compartment 2 are output to complete the power supply of the high-voltage electrical equipment.

[0053] Control strategy 2 for contactor combination module:

[0054] When the power battery voltage is 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J1, contactor J4, contactor J5, and contactor J10, and finally flows into the generator range extender controller to perform pre-charging of the generator controller and realize the generator start-up.

[0055] When the power battery voltage is 900V and the engine is started, the engine, power battery, 500A fuse 1, contactor J1, contactor J4, contactor J5, contactor J10, and contactor J9 form a simple hybrid power circuit, realizing a simple power distribution mode for special vehicles.

[0056] This invention features a simple structure and convenient control. By receiving bus control commands, it controls high-voltage contactors to achieve sequential power distribution and protection for high-voltage components such as the vehicle's first-axle hub drive motor, second-axle hub drive motor, third-axle hub drive motor, hub motor cooling electric pump, water pump and fan, and DC900 / DC28 power converter. It also enables the vehicle-wide grid connection of the high-voltage generator controller, power battery, supercapacitor, and bidirectional DC-DC converter. Simultaneously, it monitors the operating status of electrical equipment and provides overcurrent and overvoltage protection. Furthermore, it reports status and fault alarm information via the bus, ensuring reliable operation of the electrical equipment.

[0057] The intelligent high-voltage power distribution unit supports two power modes, including enhanced hybrid power (generator + battery + capacitor) mode and simple hybrid power (generator + battery) mode.

[0058] Each output of the intelligent high-voltage power distribution device has a connection and disconnection function, and the high-voltage output has a soft start function to prevent large current surges from causing arcing and burning problems when the contactor operates, thus burning out the contactor.

[0059] The control unit of the intelligent high-voltage power distribution device monitors the status of each input and output of the power distribution, samples the voltage and current in real time, and uploads the monitoring status through CAN bus and FlexRay bus communication.

[0060] Intelligent high-voltage power distribution devices have high and low voltage isolation and leakage detection functions to ensure the safety of high-voltage electricity use;

[0061] The control board module's MCU processor uses a 2-bit floating-point DSP28335 processor, supporting 12-channel AD acquisition, 22-channel IO output, 22-channel IO input, 1-channel 232 bus, 2-channel CAN bus, and 1-channel FlexRay bus.

[0062] The control board module is the core of the intelligent high-voltage power distribution device. It is used for data acquisition and processing, logic operations, bus communication and other functions. It mainly realizes the bus transmission and reception communication of the high-voltage distribution box, current and voltage monitoring, and sequential power distribution and protection of high-voltage components.

[0063] The driver board module supports 12 high-side drives. Each drive channel adopts opto-isolation and push-pull output circuits to drive PMOS transistors to control the on / off state of the contactor. The drive load capacity can reach 20A.

[0064] The motherboard module supports 12V, 5V, and 3.3V power outputs, 10 IO outputs, and 24 IO conditioning and acquisitions, mainly providing power supply and conversion interfaces for the driver board module and the control board module.

[0065] The data acquisition and control board module supports 5V and ±15V power output and 12-channel analog-to-analog conversion. It is mainly responsible for data acquisition and processing of the voltage acquisition board module and current sensor, maintaining the correct linear relationship between DC signal input and output.

[0066] The voltage acquisition board module supports 6-channel high voltage acquisition and leakage current detection functions, and is mainly responsible for high voltage acquisition and conversion.

[0067] The contactor combination module supports 7 channels of 400A load, 2 channels of 150A load, and 7 channels of current sensors, mainly realizing the power distribution strategy, current and voltage monitoring and protection of high-voltage components.

[0068] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An intelligent high-voltage power distribution device, characterized in that: The system includes a drive board module, a motherboard module, a control board module, a contactor adapter board module, a data acquisition and control board module, a voltage acquisition board module, a contactor combination module, and an insulation monitoring module. The motherboard module provides power supply and conversion interfaces for the drive board and control board modules. The control board module enables bus communication, current and voltage monitoring, and sequential power distribution and protection of high-voltage components. The contactor adapter board module provides connection interfaces for the drive board and contactor combination modules. The data acquisition and control board module is used for data acquisition and processing from the voltage acquisition board module and current sensor, maintaining the correct linear relationship between DC signal input and output. The voltage acquisition board module is used for high-voltage acquisition and conversion. The contactor combination module is used for power distribution, current and voltage monitoring, and protection of high-voltage components. The system power supply and control interface connector is connected to the motherboard module CY1 interface; the precharge control interface connector is connected to the motherboard module CY2 interface; the DC / DC power supply and control interface connector is connected to the motherboard module CY2 interface. The vehicle terminal sends a power distribution request command through the FlexRay bus interface connector, which then reaches the control board module through the CY2 interface of the motherboard module. After receiving the power distribution request command, the control board module outputs it through the driver board module, which then passes through the through-wall connector 2 and the contactor adapter module to reach the contactor combination module. The contactor combination module outputs the power to the wiring compartment 1 and wiring compartment 2 through the high-voltage power distribution strategy to complete the power supply of the high-voltage electrical equipment. After the contactor combination module completes power distribution, the load's operating voltage is converted from high voltage to 0-4.5V analog voltage by the voltage acquisition board module. The acquisition control board module transmits the 0-4.5V analog voltage to the control board module for processing through the subtraction operational amplifier isolation circuit. The control board module sends the processed voltage data to the flexray bus interface connector through the CY2 interface of the motherboard module. After the contactor combination module completes power distribution, the load's operating current is directly transmitted from the 0-4.5V analog voltage to the control board module through the subtraction operational amplifier isolation circuit. The control board module then sends the processed voltage data to the flexray bus interface connector through the CY2 interface of the motherboard module. High-power DC / DC operating mode data is sent to the control board module via the CAN of the DC / DC power supply and control interface connector. The control board module reads the data from the CAN receive buffer via the MCU, converts the data into a level signal according to the bus protocol, and controls the output of the drive board module through the level signal. The output signal is connected to the contactor combination module to complete the power distribution of the high-voltage load equipment. The insulation monitoring module's CAN bus is connected to the CY5 interface of the motherboard module via the acquisition control board module and through-wall connector 1.

2. The intelligent high-voltage power distribution device according to claim 1, characterized in that: The drive board module, motherboard module, control board module, contactor adapter board module, data acquisition and control board module, voltage acquisition board module, contactor combination module, and insulation monitoring module are all housed within the mechanical housing.

3. The intelligent high-voltage power distribution device according to claim 1, characterized in that: The drive board module, motherboard module, and control board module are all located in the low-pressure compartment, while the contactor adapter board module, data acquisition and control board module, voltage acquisition board module, contactor combination module, and insulation monitoring module are located in the high-pressure compartment.

4. The intelligent high-voltage power distribution device according to claim 3, characterized in that: The low-pressure chamber and the high-pressure chamber are connected by a through-wall connector.

5. The intelligent high-voltage power distribution device according to claim 1, characterized in that: The system power supply and control interface connector is used for low-voltage system power supply, power distribution request and power distribution completion command status output, and receiving and forwarding system CAN information data; the precharge control interface connector is used to control the precharge of 1-3 bridge motor drivers and collect the precharge completion status, and at the same time control the power distribution of 1-3 bridge motor drivers and auxiliary load equipment; the DC / DC power supply and control interface connector is used for charging logic processing of high-power DC-DC, power battery and supercapacitor and CAN bus data communication of high-power DC-DC.

6. The intelligent high-voltage power distribution device according to claim 1, characterized in that: When the intelligent high-voltage power distribution device is in pre-charge mode, the control board module drives the relay of the motherboard module through the IO signal, and outputs a high-level signal to the pre-charge control interface connector through the CY2 interface of the motherboard module. The 1-3 bridge motor driver collects the high level and starts pre-charge. After the driver completes the pre-charge, the 1-3 bridge motor driver outputs a high level. The high level output by the 1-3 bridge motor driver flows into the CY2 interface of the motherboard module through the pre-charge control interface connector. After the control board module collects the high-level data of the CY2 interface, it converts the level data into CAN bus data and sends it to the vehicle terminal.

7. The intelligent high-voltage power distribution device according to claim 1, characterized in that: When the control board module receives CAN bus data from the insulation monitoring module via the CY5 interface, it processes the data by converting CAN to Flexray and then sends the data to the vehicle terminal for display via Flexray.

8. The intelligent high-voltage power distribution device according to claim 1, characterized in that: When the vehicle terminal sends a power distribution request command for "enhanced hybrid mode", the command signal enters through the FlexRay bus interface connector, reaches the control board module through the CY2 interface of the motherboard module, and after receiving the power distribution request command, the control board module outputs it through the drive board module, passes through the through-wall connector 2 and the contactor adapter module, and reaches the contactor combination module. The control strategy 1 of the contactor combination module outputs wiring compartment one and wiring compartment two to complete the power supply of the high-voltage electrical equipment.

9. A power distribution method based on the intelligent high-voltage power distribution device according to any one of claims 1-8, characterized in that: The control strategy for power distribution control using contactor combination modules follows these steps: When the voltage of the supercapacitor is lower than the voltage of the power battery, the voltage output by the power battery passes through 500A fuse 1, contactor J1, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J8, and 500A fuse 2, and is finally output to the supercapacitor terminal to execute the Buck constant current charging of the circuit, thereby realizing the fast charging of the supercapacitor. When the voltage of the supercapacitor is greater than the voltage of the power battery but less than the bus voltage of 900V, the voltage output by the power battery passes through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, and 500A fuse 2, and finally flows into the supercapacitor terminal to execute the constant current charging of the circuit, thereby realizing the boost charging of the supercapacitor to 900V. When the supercapacitor voltage is equal to 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, and finally flows into the 1-3 bridge motor driver to execute the constant voltage discharge of the Bus circuit, achieving a constant voltage output of 900V on the bus. When the bus voltage is 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, contactor J5, and contactor J10, and finally flows into the generator range extender controller to perform pre-charging of the generator controller and realize the generator start-up. When the bus voltage is 900V and the engine is started, the engine, power battery, 500A fuse 1, contactor J6, gold resistor 2 / contactor J2, high-power DC / DC converter, gold resistor 1 / contactor J7, contactor J3, 500A fuse 2, supercapacitor terminal, contactor J4, contactor J5, contactor J10, and contactor J9 form an enhanced hybrid power circuit to realize the hybrid power distribution mode of special vehicles.

10. The power distribution method according to claim 9, characterized in that: The control strategy of the contactor combination module has two steps as follows: When the power battery voltage is 900V, the voltage output from the power battery passes through 500A fuse 1, contactor J1, contactor J4, contactor J5, and contactor J10, and finally flows into the generator range extender controller to perform pre-charging of the generator controller and realize the start of the generator. When the power battery voltage is 900V and the engine is started, the engine, power battery, 500A fuse 1, contactor J1, contactor J4, contactor J5, contactor J10, and contactor J9 form a simple hybrid power circuit, realizing a simple power distribution mode for special vehicles.

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