High-low voltage power distribution device based on special vehicle

Abstract

The invention relates to the technical field of high-low voltage intelligent power distribution, in particular to a high-low voltage power distribution device based on a special vehicle. A mother board module of the device is connected with a power supply and control interface aviation plug through a CY1 interface; the mother board module is connected with a power supply and bus communication interface aviation plug through a CY2 interface; the mother board module is connected with a debugging interface aviation plug through a CY3 interface; the mother board module is connected with the relay combination module through a CY4 interface and a through-wall aviation plug I; the mother board module is connected with the insulation monitoring module and the voltage acquisition board through a CY5 interface and a through-wall aviation plug 2. The high-low voltage power distribution device is applied to vehicles of the same type of a certain special vehicle, can monitor information such as power supply output states and voltage and current parameters of all high-low voltage electric equipment, can also monitor the falling-off of a high-voltage plug and insulation resistance conditions in real time, and can master the operation conditions of the electric equipment in time; complex high-low voltage power distribution logic control is realized, and the intelligent management requirement of multi-path high-low voltage power distribution is met.

Description

Technical Field

[0001] This invention relates to the technical field of high and low voltage intelligent power distribution, and specifically to a high and low voltage power distribution device based on special 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 and low-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 internal high-voltage and low-voltage wiring harnesses, are irregularly distributed, are messy, and cannot achieve high-voltage and low-voltage separation. At the same time, the structure of high-voltage and low-voltage power distribution devices 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] (I) The technical problem to be solved by the present invention

[0004] To address the aforementioned problems in existing technologies, this invention proposes a high- and low-voltage power distribution device for special vehicles. Applied to a similar type of special vehicle, it can not only monitor the power supply output status and voltage and current parameters of various high- and low-voltage electrical equipment, but also monitor high-voltage plug disconnection, insulation resistance, and timely grasp the operating status of electrical equipment. It realizes relatively complex high- and low-voltage power distribution logic control and meets the intelligent management needs of multi-channel high- and low-voltage power distribution.

[0005] (II) Technical Solution of the Invention

[0006] The present invention proposes a high and low voltage power distribution device based on special vehicles, including a drive board module (1), a motherboard module (2), a control board module (3), a voltage acquisition board (4), a contactor combination module, an insulation monitoring module (26), a DC540V / DC28V power converter (47), a through-wall aviation plug one (48), and a through-wall aviation plug two (49).

[0007] The control board module (1), drive board module, and motherboard module (2) are arranged in the low-pressure compartment; the insulation monitoring module, voltage acquisition board module, and contactor combination module are arranged in the high-pressure compartment; and the DC540 / DC28V power converter is arranged in the bottom compartment.

[0008] The drive board module (1) and the control board module (3) are plugged into the motherboard module (2) via onboard connectors;

[0009] The motherboard module (2) is connected to the power supply and control interface connector (37) via the CY1 interface. It is mainly used for the low-voltage system power supply, power distribution request and power distribution completion command status output and reception of the high-voltage distribution box.

[0010] The motherboard module (2) is connected to the power supply and bus communication interface connector (38) via the CY2 interface. 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.

[0011] The motherboard module (2) is connected to the debugging interface connector (39) via the CY3 interface, and is mainly used for program downloading and debugging of the main control board module;

[0012] The motherboard module (2) is connected to the relay combination module via the CY4 interface, through-wall aviation plug one (48); the motherboard module (2) is connected to the insulation monitoring module (26) and voltage acquisition board (4) via the CY5 interface, through-wall aviation plug two (49);

[0013] The DC540V / DC28V power converter and contactor combination module are connected to the low-voltage output positive interface connector (40) and the low-voltage output negative interface connector (41).

[0014] Furthermore, the contactor combination module includes 400A contactor one J5 (5), 400A contactor two J1 (6), 400A contactor three J2 (7), 400A contactor four J3 (8), 400A contactor five J4 (9), 50A contactor one J16 (10), 50A contactor two J13 (11), 50A contactor three J17 (12), 50A contactor four J14 (13), and 50A contactor… Contactor 5 J15 (14), 50A contactor 6 J18 (15), 50A contactor 7 J11 (16), 50A contactor 8 J12 (17), 400A fuse 1 (18), 400A fuse 2 (19), 400A fuse 3 (20), 400A fuse 4 (21), 400A fuse 5 (22), pre-charge resistor 1 (23), pre-charge resistor 2 (24), pre-charge resistor 3 (25);

[0015] The positive terminal connector (27) of energy storage device 1 is connected to the DC bus via 400A fuse one (18) and 400A contactor one J5 (5); the positive terminal connector (29) of energy storage device 2 is connected to the DC bus via 400A fuse two (19) and 400A contactor three J2 (7); the positive terminal connector (31) of generator is connected to the DC bus via 400A fuse three (20), pre-charge resistor one (23), and 50A contactor four J1. 4(13) is connected to the DC bus; the generator positive terminal connector (31) is connected to the DC bus via 400A fuse three (20) and 400A contactor four J3 (8); the front axle high-voltage load positive terminal connector (33) is connected to the DC bus via 400A fuse four (21), pre-charge resistor two (24), and 50A contactor five J15 (14); the front axle high-voltage load positive terminal connector (33) is connected to the DC bus via 400A fuse four (21), pre-charge resistor two (24), and 50A contactor five J15 (14); The fourth (21) and 400A contactor J4 (9) are connected to the DC bus; the positive terminal connector (42) of the rear axle high-voltage load is connected to the DC bus via the fifth (22) of the 400A fuse, the third (25) of the pre-charge resistor, and the second (11) of the 50A contactor; the positive terminal connector (42) of the rear axle high-voltage load is connected to the DC bus via the fifth (22) of the 400A fuse and the first (5) of the 400A contactor; the high-voltage auxiliary load 1 is connected to... The high-voltage auxiliary load 2 interface connector (44) is connected to the DC bus via a 50A contactor J11 (16); the high-voltage auxiliary load 3 interface connector (45) is connected to the DC bus via a 50A contactor J16 (10); the high-voltage auxiliary load 3 interface connector (45) is connected to the DC bus via a 50A contactor J17 (12); and the DC540V / DC28V power converter is connected to the DC bus via a 50A contactor J18 (15).

[0016] Furthermore, the driver board module (1) mainly consists of 14 driving channels. Each driving channel adopts opto-isolation and push-pull output circuit to drive PMOS transistors to control the on and off of the contactor.

[0017] Furthermore, the motherboard module (2) supports 12V, 5V, and 3.3V power output, 4-channel IO output, and 20-channel IO conditioning and acquisition. It mainly provides power supply and conversion interfaces for the driver board module (1) and the control board module (3). It mainly 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 4-channel IO output drive circuit, and a 20-channel acquisition and conditioning circuit.

[0018] Furthermore, the control board module (3) is used for IO level processing, AD acquisition, logic operation, and bus communication functions. It mainly realizes the bus transmission and reception communication of the high-voltage distribution box, current and voltage monitoring, and the sequential power distribution and protection of high-voltage components. It is mainly composed of an MCU processor, 8-channel AD acquisition circuit, 20-channel IO output circuit, 20-channel IO input circuit, 3-channel CAN integrated circuit, and power integrated circuit.

[0019] Furthermore, the voltage acquisition board module (4) is mainly composed of 4 high-voltage sensor circuits, which are mainly responsible for the acquisition and conversion of high-voltage simulator data.

[0020] The beneficial effects of this invention are:

[0021] (1) Each output of the intelligent high and low voltage power distribution device has a connection and disconnection function. The high voltage output has a soft start function to prevent large current impact from causing arcing and burning when the contactor operates, thus burning out the contactor.

[0022] (2) The control unit of the intelligent high and low 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 communication.

[0023] (3) Intelligent high and low voltage power distribution devices have high and low voltage isolation and leakage detection functions to ensure the safety of high voltage power use;

[0024] (4) The intelligent high and low voltage power distribution device has a high voltage connector loosening detection function. When the high voltage connector is locked, the two auxiliary points are in the connected state. When the high voltage connector is loose, the two auxiliary points are in the disconnected state.

[0025] (5) The intelligent high and low voltage power distribution device has the function of outputting DC28V power with a power of 7.5kw. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the components of the present invention;

[0027] Figure 2 This is a schematic diagram of the electrical principle of the system of the present invention;

[0028] Figure 3 This is a schematic diagram of the contactor assembly module of the present invention;

[0029] Figure 4 This is a schematic diagram of the main control board module unit of the present invention;

[0030] Figure 5 This is a schematic diagram of the contactor assembly module of the present invention. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] like Figures 1 to 5 As shown, the high and low voltage power distribution device for special vehicles of this invention mainly consists of the following components: drive board module (1), motherboard module (2), control board module (3), voltage acquisition board (4), contactor combination module, insulation monitoring module (26), positive interface connector for energy storage device 1 (27), negative interface connector for energy storage device 1 (28), positive interface connector for energy storage device 2 (29), negative interface connector for energy storage device 2 (30), positive interface connector for generator (31), negative interface connector for generator (32), positive interface connector for front axle high voltage load (33), negative interface connector for front axle high voltage load (34), and interface connector for high voltage auxiliary load 1 (35). Reserved interface connector (36), power supply and control interface connector (37), bus communication interface connector (38), debugging interface connector (39), low voltage output positive interface connector (40), low voltage output negative interface connector (41), rear axle high voltage load positive interface connector (42), rear axle high voltage load negative interface connector (43), high voltage auxiliary load 2 interface connector (44), high voltage auxiliary load 3 interface connector (45), mechanical housing (46), DC540V / DC28V power converter (47), through-wall connector 1 (48), through-wall connector 2 (49).

[0035] The control board module (1), drive board module, and motherboard module (2) are arranged in the low-pressure compartment; the insulation monitoring module, voltage acquisition board module, and contactor combination module are arranged in the high-pressure compartment; and the DC540 / DC28V power converter is arranged in the bottom compartment.

[0036] The drive board module (1) and the control board module (3) are plugged into the motherboard module (2) via onboard connectors;

[0037] The motherboard module (2) is connected to the power supply and control interface connector (37) via the CY1 interface; the motherboard module (2) is connected to the power supply and bus communication interface connector (38) via the CY2 interface; the motherboard module (2) is connected to the debugging interface connector (39) via the CY3 interface; the motherboard module (2) is connected to the relay combination module via the CY4 interface, through-wall connector one (48); the motherboard module (2) is connected to the insulation monitoring module (26) and voltage acquisition board (4) via the CY5 interface, through-wall connector two (49);

[0038] The contactor combination module mainly consists of 400A contactor one J5 (5), 400A contactor two J1 (6), 400A contactor three J2 (7), 400A contactor four J3 (8), 400A contactor five J4 (9), 50A contactor one J16 (10), 50A contactor two J13 (11), 50A contactor three J17 (12), 50A contactor four J14 (13), 50A contactor five J15 (14), and 50A contactor... The device consists of six J18 (15), 50A contactor seven J11 (16), 50A contactor eight J12 (17), 400A fuse one (18), 400A fuse two (19), 400A fuse three (20), 400A fuse four (21), 400A fuse five (22), pre-charge resistor one (23), pre-charge resistor two (24), and pre-charge resistor three (25), which mainly realize the power distribution strategy, current and voltage monitoring and protection of high-voltage components.

[0039] The positive terminal connector (27) of the energy storage device 1 is connected to the DC bus via a 400A fuse (18) and a 400A contactor J5 (5);

[0040] The positive terminal connector (29) of the energy storage device 2 is connected to the DC bus via a 400A fuse 2 (19) and a 400A contactor 3 J2 (7);

[0041] The generator positive terminal connector (31) is connected to the DC bus via a 400A fuse (20), a pre-charge resistor (23), and a 50A contactor (13).

[0042] The generator positive terminal connector (31) is connected to the DC bus via a 400A fuse three (20) and a 400A contactor four J3 (8);

[0043] The front axle high voltage load positive terminal connector (33) is connected to the DC bus via a 400A fuse (21), a pre-charge resistor (24), and a 50A contactor J15 (14).

[0044] The front axle high-voltage load positive terminal connector (33) is connected to the DC bus via 400A fuse four (21) and 400A contactor five J4 (9);

[0045] The rear axle high voltage load positive terminal connector (42) is connected to the DC bus via a 400A fuse (22), a pre-charge resistor (25), and a 50A contactor (11).

[0046] The positive terminal connector (42) of the high voltage load of the rear axle is connected to the DC bus via a 400A fuse (22) and a 400A contactor J5 (5);

[0047] The high-voltage auxiliary load 1 interface connector (35) is connected to the DC bus via a 50A contactor J11 (16);

[0048] The high-voltage auxiliary load 2 interface connector (44) is connected to the DC bus via a 50A contactor J16 (10);

[0049] The high-voltage auxiliary load 3 interface connector (45) is connected to the DC bus via a 50A contactor J17 (12);

[0050] The DC540V / DC28V power converter is connected to the DC bus via a 50A contactor J18(15);

[0051] The DC540V / DC28V power converter and contactor combination module are connected to the low-voltage output positive interface connector (40) and the low-voltage output negative interface connector (41).

[0052] The driver board module (1) is mainly composed of 14 driving channels. Each driving channel adopts opto-isolation and push-pull output circuit to drive PMOS transistor to control the on and off of the contactor. Opto-isolation is achieved by using optocouplers to isolate the signal. The push-pull output circuit can improve the current driving capability and drive the load capacity up to 20A.

[0053] The motherboard module (2) supports 12V, 5V, and 3.3V power output, 4-channel IO output, and 20-channel IO conditioning and acquisition. It mainly provides power supply and conversion interface for the driver board module (1) and the control board module (3). It mainly 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 4-channel IO output drive circuit, and a 20-channel acquisition and conditioning circuit.

[0054] The control board module (3) is used for IO level processing, AD acquisition, logic operation, 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 the sequential power distribution and protection of high voltage components. It is mainly composed of MCU processor, 8-channel AD acquisition circuit, 20-channel IO output circuit, 20-channel IO input circuit, 3-channel CAN integrated circuit, and power integrated circuit.

[0055] The control board module (3) uses a high-performance ARM Cortex-M4 series processor, which supports 8-channel AD acquisition, 20-channel IO output, 20-channel IO input, and 3-channel CAN bus.

[0056] The voltage acquisition board module (4) is mainly composed of 4 high voltage sensor circuits, which are mainly responsible for the acquisition and conversion of high voltage simulator.

[0057] The system power supply and control interface connector (37) is connected to the motherboard module (2) CY1 interface, mainly used for the low-voltage system power supply, power distribution request and power distribution completion command status output and reception of the high-voltage distribution box.

[0058] The bus interface connector (38) is connected to the CY2 interface of the motherboard module (2) and the control board module (3), and 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.

[0059] The debugging interface connector (39) is connected to the CY3 interface of the motherboard module (2) and the control board module (3), and is mainly used for program downloading and debugging of the main control board module.

[0060] Energy storage devices 1 and 2 are connected to the contactor combination module and are mainly responsible for providing the 540V high-voltage power supply to the contactor combination module.

[0061] The DC540V / DC28V power converter (47) is connected to a low-voltage load and is mainly responsible for converting DC540V (400V-700V) DC voltage into DC voltage that meets the needs of the user's downstream equipment. The output voltage / power is 28V / 7500W, and it has overvoltage protection, overcurrent protection, short circuit protection and overtemperature protection functions.

[0062] The intelligent high and low voltage power distribution device has the function of outputting DC28V power with a power of 7.5kw.

[0063] The methods for intelligent high and low voltage power distribution devices to achieve power distribution control and equipment operation status monitoring are as follows:

[0064] 1. For example Figure 1-5 As shown, the vehicle terminal sends a power distribution request command through the CAN bus interface connector, and reaches the control board module (3) through the CY2 interface of the motherboard module (2). After receiving the power distribution request command, the control board module (3) outputs it to the CY4 interface through the drive board module (1), and reaches the contactor combination module through the through-wall connector (48). The contactor combination module outputs it to the load interface through the high voltage power distribution strategy to complete the power-on of the high voltage electrical equipment.

[0065] 2. For example Figure 1-5 As shown, after the contactor combination module completes the power distribution, the working voltage of the load is converted from high voltage to 0-4.5V analog voltage by the voltage acquisition board (4). The voltage acquisition board (4) transmits the 0-4.5V analog voltage to the control board module (3) through the through-wall aviation plug 2 (49) for processing. The control board module (3) sends the processed voltage data to the bus interface aviation plug through the CY2 interface of the motherboard module (2).

[0066] The method for real-time monitoring of insulation data in high-voltage environments using intelligent high and low voltage power distribution devices is as follows:

[0067] like Figure 1-5 As shown, the CAN bus of the insulation monitoring module (26) is connected to the CY5 interface of the motherboard module (2) through the through-wall connector 2 (49). When the main control board module (3) receives the CAN bus data of the insulation monitoring module (26) from the CY5 interface, the main control board module (3) reads the data received and buffered by the CAN integrated circuit 1 through the MCU processor, and sends the data to the vehicle terminal for display through the CY2 interface. This realizes real-time monitoring of insulation data under high voltage environment and ensures the safety of personnel.

[0068] The method for detecting high-voltage load connector detachment in intelligent high and low voltage power distribution devices is as follows:

[0069] like Figure 1-5 As shown, when the high-voltage load connector is disconnected, the connector auxiliary contact is in the open state. The level signal enters the motherboard module (2) CY4 interface through the contactor combination module and the through-wall connector (48). The main control board module (3) collects and converts the data of the motherboard module (2) CY4 interface, and sends the converted data to the vehicle terminal for alarm display through the CY2 interface.

[0070] The method for implementing the drive contactor combination module in intelligent high and low voltage power distribution equipment is as follows:

[0071] like Figure 1-5 As shown, when the vehicle system outputs a high-level power distribution request command, it enters through the power supply and control interface connector (37), and after passing through the CY 1 interface of the motherboard module (2), it performs level conversion. The converted TTL level reaches the control board module (3). The control board module (3) performs logic conversion on the collected level to enable the output of the drive board module (1). It reaches the contactor combination module through the through-wall connector (48), and outputs to the load equipment through the control strategy 1 of the contactor combination module to complete the power-on of the high-voltage electrical equipment.

[0072] Control strategy 1 is as follows:

[0073] (1) When the high and low voltage power distribution device receives the power distribution request command, the energy storage device 1 outputs 540V voltage through 400A fuse one (18) and closes 400A contactor two J1 (6) to the DC bus. The energy storage device 2 outputs 540V voltage through 400A fuse two (19) and closes 400A contactor three J2 (7) to the DC bus, providing 540V high voltage to the DC bus and enhancing the load-carrying capacity of the DC bus.

[0074] (2) When there is a 540V high voltage on the DC bus, close the 50A contactor 2 J13 (11), 50A contactor 4 J14 (13), and 50A contactor 5 J15 (14) to precharge the generator, the front axle high voltage load, and the rear axle high voltage load controller. After all precharging is completed, disconnect the 50A contactor 2 J13 (11), 50A contactor 4 J14 (13), and 50A contactor 5 J15 (14), and close the 400A contactor 4 J3 (8), 400A contactor 5 J4 (9), 400A contactor 1 J5 (5), 50A contactor 7 J11 (16), 50A contactor 8 J12 (17), 50A contactor 1 J16 (10), 50A contactor 3 J17 (12), and 50A contactor 6 J18 (15) to start the generator and supply power to the front axle high voltage load and the rear axle high voltage load.

[0075] like Figure 1-5 As shown, the debugging interface connector (39) enters the control board module (3) through the CY3 interface of the motherboard module (2) to realize the simulation and download of the software program.

[0076] The intelligent high and low voltage power distribution device supports two power modes, including silent mode and simple hybrid mode;

[0077] The silent mode is: after the system is powered on, the main contactor closes to connect energy storage device 1 and energy storage device 2 to the input branch of the high and low voltage power distribution device, providing high voltage power to the DC bus and completing the high voltage power-on process.

[0078] The simplified hybrid power mode is as follows: After the system is powered on, the main contactor closes to connect energy storage device 1 and energy storage device 2 to the input branch of the high and low voltage power distribution device. Then, the pre-charge contactor is energized, and the current slowly charges the capacitor of the generator controller through a pre-charge resistor. When the capacitor voltage is close to the voltage of the energy storage device, the generator main contactor is energized again and the pre-charge contactor is disconnected, thus smoothly completing the high voltage power-on process.

[0079] This invention features a simple structure and convenient control. By receiving bus control or power distribution request instructions, it controls a high-voltage contactor to achieve sequential power distribution and protection for components such as the front axle hub drive motor, rear axle hub drive motor, high-voltage fan, brake pump station, winch, and DC540V / DC28V power converter. It also completes the grid connection of the entire vehicle, including the high-voltage generator controller, power battery 1, and power battery 2. 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.

[0080] This invention has been successfully installed on a special vehicle in China, and the system has been integrated and informatized along with the vehicle as it passed the initial acceptance test.

Claims

1. A high and low voltage power distribution device based on a special vehicle, characterized by, The drive board module (1), the mother board module (2), the control board module (3), the voltage acquisition board (4), the contactor combination module, the insulation monitoring module (26), the DC 540V / DC 28V power converter (47), the wall through connector I (48), and the wall through connector II (49) are included. The control board module (1), the drive board module, and the mother board module (2) are arranged in the low-voltage cabin; the insulation monitoring module, the voltage acquisition board module, and the contactor combination module are arranged in the high-voltage cabin; and the DC 540 / DC 28V power converter is arranged in the bottom cabin. The drive board module (1) and the control board module (3) are plugged into the mother board module (2) through the on-board connector. The mother board module (2) is connected with the power supply and control interface connector (37) through the CY1 interface, and is mainly used for the low-voltage system power supply, power distribution request, and state output and reception of the power distribution completion instruction of the high-voltage distribution box. The mother board module (2) is connected with the power supply and bus communication interface connector (38) through the CY2 interface, and is mainly used for receiving the control instruction of the vehicle-mounted terminal and sending the current and voltage data of the high-voltage distribution box. The mother board module (2) is connected with the debugging interface connector (39) through the CY3 interface, and is mainly used for program downloading and debugging of the main control board module. The mother board module (2) is connected with the CY4 interface, the wall through connector I (48), and the relay combination module; and the mother board module (2) is connected with the CY5 interface, the wall through connector II (49), the insulation monitoring module (26), and the voltage acquisition board (4). The DC 540V / DC 28V power converter is connected with the contactor combination module, the low-voltage output positive interface connector (40), and the low-voltage output negative interface connector (41).

2. A high-low voltage power distribution device based on a special vehicle as claimed in claim 1, wherein, The contactor combination module includes a 400A contactor I J5 (5), a 400A contactor II J1 (6), a 400A contactor III J2 (7), a 400A contactor IV J3 (8), a 400A contactor V J4 (9), a 50A contactor I J16 (10), a 50A contactor II J13 (11), a 50A contactor III J17 (12), a 50A contactor IV J14 (13), a 50A contactor V J15 (14), a 50A contactor VI J18 (15), a 50A contactor VII J11 (16), a 50A contactor VIII J12 (17), a 400A fuse I (18), a 400A fuse II (19), a 400A fuse III (20), a 400A fuse IV (21), a 400A fuse V (22), a pre-charge resistor I (23), a pre-charge resistor II (24), and a pre-charge resistor III (25). The positive terminal of the energy storage device 1 is connected to the DC bus through a 400A fuse 1 (18), a 400A contactor 1 J5 (5) and a DC bus; the positive terminal of the energy storage device 2 is connected to the DC bus through a 400A fuse 2 (19), a 400A contactor 3 J2 (7) and a DC bus; the positive terminal of the generator is connected to the DC bus through a 400A fuse 3 (20), a pre-charge resistor 1 (23), a 50A contactor 4 J14 (13) and a DC bus; the positive terminal of the generator is connected to the DC bus through a 400A fuse 3 (20), a 400A contactor 4 J3 (8) and a DC bus; the positive terminal of the front bridge high-voltage load is connected to the DC bus through a 400A fuse 4 (21), a pre-charge resistor 2 (24), a 50A contactor 5 J15 (14) and a DC bus; the positive terminal of the front bridge high-voltage load is connected to the DC bus through a 400A fuse 4 (21), a 400A contactor 5 J4 (9) and a DC bus; the positive terminal of the rear bridge high-voltage load is connected to the DC bus through a 400A fuse 5 (22), a pre-charge resistor 3 (25), a 50A contactor 2 J13 (11) and a DC bus; the positive terminal of the rear bridge high-voltage load is connected to the DC bus through a 400A fuse 5 (22), a 400A contactor 1 J5 (5) and a DC bus; the high-voltage auxiliary load 1 is connected to the DC bus through a 50A contactor 7 J11 (16); the high-voltage auxiliary load 2 is connected to the DC bus through a 50A contactor 1 J16 (10); the high-voltage auxiliary load 3 is connected to the DC bus through a 50A contactor 3 J17 (12); and the DC 540V / DC 28V power converter is connected to the DC bus through a 50A contactor 6 J18 (15).

3. A high-low voltage power distribution device based on a special vehicle according to claim 1 or 2, characterized in that, The drive board module (1) is mainly composed of 14 drive channels, each drive channel adopts an optoelectronic isolation and push-pull output circuit, and a PMOS tube is used to realize the on-off of the contactor.

4. A high-low voltage power distribution device based on a special vehicle as claimed in claim 3, wherein, The mother board module (2) supports 12V, 5V and 3.3V power output, 4-way IO output and 20-way IO conditioning and collection, mainly provides power supply and conversion interface for the drive board module (1) and the control board module (3), and is mainly composed of a 24V-to-12V power conversion circuit, a 24V-to-5V power conversion circuit, a 5V-to-3.3V linear power circuit, a 4-way IO output drive circuit and a 20-way collection and conditioning circuit.

5. A high-low voltage power distribution device based on a special vehicle according to claim 1 or 4, characterized in that, The control board module (3) is used for IO level processing, AD collection, logic operation and bus communication function, mainly realizes bus transceiving communication, current and voltage monitoring and sequence power distribution and protection of high-voltage power distribution box, and is mainly composed of an MCU processor, an 8-way AD collection circuit, a 20-way IO output circuit, a 20-way IO input circuit, a 3-way CAN integrated circuit 1 and a power integrated circuit.

6. A high-low voltage power distribution device based on a special vehicle as claimed in claim 5, wherein, The voltage collection board module (4) is mainly composed of 4-way high-voltage sensor circuits, and is mainly responsible for high-voltage simulator collection and conversion.

7. A high-low voltage power distribution device based on a special vehicle as claimed in claim 6, wherein, The method for realizing power distribution control and equipment operation state monitoring of the intelligent high-low voltage power distribution device is as follows: (1) The vehicle terminal sends the power distribution request command through the CAN bus interface, enters through the CY2 interface of the motherboard module (2) to the control board module (3), and after the control board module (3) receives the power distribution request instruction, it is output to the CY4 interface through the drive board module (1), and through the wall through the first plug-in (48) to the contactor combination module, and the contactor combination module outputs to the load interface through the high-voltage power distribution strategy, and the power-on of the high-voltage electrical equipment is completed. (2) After the contactor combination module completes power distribution, the working voltage of the load is converted into 0-4.5V analog voltage by the voltage acquisition board (4), and the voltage acquisition board (4) transmits the 0-4.5V analog voltage to the control board module (3) through the wall through the second plug-in (49) for processing, and the control board module (3) sends the processed voltage data to the bus interface plug-in through the CY2 interface of the motherboard module (2).

8. A high-low voltage power distribution device based on a special vehicle as claimed in claim 6, wherein, The method for realizing real-time monitoring of insulation data in a high-voltage environment by the intelligent high-low voltage power distribution device is as follows: The insulation monitoring module (26) CAN bus is connected to the CY5 interface of the motherboard module (2) through the wall through the second plug-in (49), and when the main control board module (3) receives the CAN bus data of the insulation monitoring module (26) transmitted through the CY5 interface, the main control board module (3) reads the data received by the CAN integrated circuit 1 buffer through the MCU processor, and sends the data to the vehicle terminal through the CY2 interface for display, thereby realizing real-time monitoring of insulation data in a high-voltage environment.

9. A high-low voltage power distribution device based on a special vehicle as claimed in claim 6, wherein, The method for realizing high-voltage load connector loosening monitoring by the intelligent high-low voltage power distribution device is as follows: When the high-voltage load connector is detached, the auxiliary contact of the connector is in an open state, and the level signal enters the CY4 interface of the motherboard module (2) through the contactor combination module and the wall through the first plug-in (48), and the main control board module (3) collects and converts the data of the CY4 interface of the motherboard module (2), and sends the converted data to the vehicle terminal through the CY2 interface for alarm display.

10. The high-low voltage power distribution device based on a special vehicle according to claim 6, characterized in that, The method for realizing the drive contactor combination module by the intelligent high-low voltage power distribution device is as follows: When the vehicle system outputs a power distribution request high-level instruction, it enters through the power supply and control interface plug-in (37), and after passing through the CY1 interface of the motherboard module (2), it is converted to TTL level, and the converted TTL level reaches the control board module (3), and the control board module (3) converts the collected level to logic, enabling the output of the drive board module (1), and through the wall through the first plug-in (48) to the contactor combination module, through the control strategy 1 of the contactor combination module to the load equipment, completing the power-on of the high-voltage electrical equipment; The control strategy 1 is as follows: (1) When the high-low voltage power distribution device collects the power distribution request command, the energy storage device 1 outputs 540V voltage through the 400A fuse 1 (18), and closes the 400A contactor 2 J1 (6) to the DC bus. The 400A fuse 2 (19) outputs 540V voltage through the 400A fuse 2 (19), and closes the 400A contactor 3 J2 (7) to the DC bus, providing 540V high voltage for the DC bus, and enhancing the load capacity of the DC bus. (2) When the DC bus has 540V high voltage, close 50A contactor two J13(11), 50A contactor four J14(13), 50A contactor five J15(14), realize the pre-charge of the generator, front axle high voltage load, rear axle high voltage load controller. When all the pre-charge is completed, open 50A contactor two J13(11), 50A contactor four J14(13), 50A contactor five J15(14), close 400A contactor four J3(8), 400A contactor five J4(9), 400A contactor one J5(5), 50A contactor seven J11(16), 50A contactor eight J12(17), 50A contactor one J16(10), 50A contactor three J17(12), 50A contactor six J18(15), realize the start of the generator, power supply of the front axle high voltage load, the rear axle high voltage load.

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