Integrated high-pressure control hydrogen fuel cell power device

Abstract

The utility model discloses an integrated high-pressure controlled hydrogen fuel cell power device, which is provided with a fuel cell module, a boosting module, a heater, a water pump, a hydrogen pump and an air compressor pump, the hydrogen pump is connected with a hydrogen pump controller, the air compressor pump is connected with an air compressor pump controller, and the air compressor pump is connected with the fuel cell module. The heater, the water pump, the hydrogen pump controller and the air compressor pump controller are all connected with the negative end of the boosting module; the energy storage unit is arranged, the negative electrode of the energy storage unit is connected with the charging interface, the battery accessory and the all-in-one unit, and the problems that an existing hydrogen fuel cell power device is large in occupied space, heavy in mass, low in power density, high in cost, high in application design difficulty and the like are solved. And meanwhile, the low-voltage self-checking control unit can monitor whether the contact of the contactor has faults such as adhesion or not, so that safety accidents caused by the faults are avoided, and the safety and reliability of the product are improved.

Description

Technical Field

[0001] The utility model relates to a fuel cell power device, in particular to an integrated high-voltage controlled fuel cell power device. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. It has been widely used in stationary power generation, automobiles, and ships. Existing hydrogen fuel cell power plants primarily consist of a fuel cell system and an energy storage system with a certain capacity. The fuel cell system primarily consists of a fuel cell module, a booster module, a heater, a water pump, a hydrogen pump, and an air compressor pump. The hydrogen pump is controlled by a hydrogen pump controller, and the air compressor pump is controlled by an air compressor pump controller. The heater, water pump, hydrogen pump controller, and air compressor pump controller are all connected to the booster module. Controllers, contactors, and other components are also required to control the isolation and switching between the fuel cell system and the energy storage system. Lithium battery systems primarily include energy storage units such as lithium batteries or supercapacitors. The output of the energy storage units connects to charging ports, battery accessories, and all-in-one units. High-voltage distribution boxes, control units, and contactors are also required to switch between various operating modes. The excessive number of high-voltage control components leads to existing hydrogen fuel cell power plants suffering from large space requirements, heavy weight, low power density, high cost, and difficult application design. Summary of the Invention

[0003] The utility model aims to solve the above-mentioned technical problems existing in the prior art and provides an integrated high-pressure controlled hydrogen fuel cell power device.

[0004] The technical solution of the utility model is: an integrated high-pressure controlled hydrogen fuel cell power device, which is provided with a fuel cell module, a boost module, a heater, a water pump, a hydrogen pump and an air compressor pump, wherein the hydrogen pump is connected to the hydrogen pump controller, the air compressor pump is connected to the air compressor pump controller, the heater, water pump, hydrogen pump controller and air compressor pump controller are all connected to the negative end of the boost module; an energy storage unit is provided, the negative pole of the energy storage unit is connected to the charging interface, battery accessories and the all-in-one unit, and is characterized in that: a whole vehicle control unit is provided, the whole The vehicle control unit is directly connected to the energy storage unit, fuel cell module, heater and water pump and is connected to the air compressor pump controller, hydrogen pump controller and boost module through the low-voltage self-test control unit; a high-voltage control unit is provided, which integrates the main positive contactor KM1, the main negative contactor KM2, the pre-charge contactor KM3, the battery accessory contactor KM4, the charging contactor KM5, the fuel cell main positive contactor KM6, the fuel cell main negative contactor KM7, fuses FU1-FU6 and the pre-charge resistor R1, the boost module The positive end of the block is connected to the positive electrode of the energy storage unit through the fuel cell main positive contactor KM6, the parallel main positive contactor KM1 and the pre-charge contactor KM3 in sequence. The pre-charge resistor R1 is connected in series with the charging contactor KM3 branch. The negative end of the boost module is connected to the negative electrode of the energy storage unit through the fuel cell main negative contactor KM7 and the main negative contactor KM2 in sequence. The positive end of the boost module is connected to the air compressor pump controller, hydrogen pump controller, water pump and heater respectively through fuses FU3-FU6. The positive end is connected to the all-in-one unit through the fuel cell main positive contactor KM6 and the fuse FU2. The positive pole of the energy storage unit is connected to the battery accessories through the battery accessory contactor KM4. The positive pole of the energy storage unit is connected to the charging interface through the charging contactor KM5. The low-voltage self-test control unit provides control signals for the main positive contactor KM1, the main negative contactor KM2, the pre-charging contactor KM3, the battery accessory contactor KM4, the charging contactor KM5, the fuel cell main positive contactor KM6 and the fuel cell main negative contactor KM7.

[0005] This utility model integrates high-voltage components such as the high-voltage distribution box, contactors, and fuses of the fuel cell system and energy storage system into a single high-voltage control unit. This not only reduces the number of components used but also the number of high-voltage pre-charge circuits, overcoming the problems of existing hydrogen fuel cell power units, such as large space requirements, heavy weight, low power density, high cost, and difficulty in application design. Furthermore, the low-voltage self-test control unit monitors the contactor for faults such as adhesion, preventing potential safety incidents and improving product safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a schematic diagram of the circuit principle of an embodiment of the present utility model. DETAILED DESCRIPTION

[0007] The utility model is an integrated high-pressure controlled hydrogen fuel cell power device such as Figure 1 As shown, the same as the prior art is that a fuel cell module, a boost module, a heater, a water pump, a hydrogen pump and an air compressor pump are provided. The hydrogen pump is connected to the hydrogen pump controller, the air compressor pump is connected to the air compressor pump controller, and the heater, water pump, hydrogen pump controller and air compressor pump controller are all connected to the negative end of the boost module; an energy storage unit is provided. The embodiment of the utility model adopts a lithium battery system, and a supercapacitor can also be used. The negative pole of the energy storage unit is connected to the charging interface, battery accessories and all-in-one unit. The difference from the prior art is that a whole vehicle control unit is provided, and the whole vehicle control unit is directly connected to the energy storage unit, fuel cell and fuel pump controller. The battery module, heater and water pump are connected and connected to the air compressor pump controller, hydrogen pump controller and boost module through a low-voltage self-test control unit; a high-voltage control unit is provided, which integrates a main positive contactor KM1, a main negative contactor KM2, a pre-charge contactor KM3, a battery accessory contactor KM4, a charging contactor KM5, a fuel cell main positive contactor KM6, a fuel cell main negative contactor KM7, fuses FU1-FU6 and a pre-charge resistor R1. All contactors use high-voltage contactors with contact status feedback function, and the contactors can be replaced with IGBTs. The positive end of the boost module is connected to the positive electrode of the energy storage unit through the fuel cell main positive contactor KM6, the parallel main positive contactor KM1 and the pre-charge contactor KM3 in sequence. The pre-charge resistor R1 is connected in series with the charging contactor KM3 branch. The negative end of the boost module is connected to the negative electrode of the energy storage unit through the fuel cell main negative contactor KM7 and the main negative contactor KM2 in sequence. The positive end of the boost module is connected to the air compressor pump controller, hydrogen pump controller, water pump and heater respectively through fuses FU3-FU6 in sequence. The positive end of the block is connected to the all-in-one unit through the fuel cell main positive contactor KM6 and the fuse FU2; the positive pole of the energy storage unit is connected to the battery accessories through the battery accessory contactor KM4, and the positive pole of the energy storage unit is connected to the charging interface through the charging contactor KM5. The low-voltage self-test control unit provides control signals for the main positive contactor KM1, the main negative contactor KM2, the pre-charging contactor KM3, the battery accessory contactor KM4, the charging contactor KM5, the fuel cell main positive contactor KM6 and the fuel cell main negative contactor KM7.

[0008] The working process is as follows:

[0009] 1. Low voltage power-on self-test status

[0010] After receiving the startup information from the vehicle control unit, the low-voltage self-test control unit enters a self-test state, checking the status of the lithium battery system, boost module, hydrogen pump controller, and air compressor controller. If the self-test is normal, the low-voltage self-test control unit controls the main negative contactor KM2, pre-charge contactor KM3, fuel cell main positive contactor KM6, and fuel cell main negative contactor KM7 in the high-voltage control unit to close and pre-charge. After pre-charging is complete, contactor KM3 is opened and the main positive contactor KM1 is closed, and the high voltage of the entire device is powered on.

[0011] 2. Startup status

[0012] When the self-test is completed, the air compressor controller, hydrogen pump controller, water pump, boost module, fuel cell module and other components are controlled to start and discharge to the all-in-one / lithium battery system; when battery accessories are required to assist in starting, the battery accessory contactor KM4 must be closed before starting the control.

[0013] 3. Shutdown state

[0014] ① Fuel cell system shutdown: After the low-voltage self-test control unit controls the shutdown of various components in the fuel cell system, the fuel cell main positive contactor KM6 and the fuel cell main negative contactor KM7 are disconnected, and the lithium battery system provides power supply, and the device operates normally;

[0015] ② The device is shut down. After the low-voltage self-test control unit controls each component in the device to shut down, the main positive contactor KM1, the main negative contactor KM2, the fuel cell main positive contactor KM6, and the fuel cell main negative contactor KM7 are disconnected, and the entire device is shut down.

[0016] 4. Fault status

[0017] When a fuel cell system fails, the low-voltage self-test control unit will control the fuel cell system to shut down, disconnect the fuel cell main positive contactor KM6 and the fuel cell main negative contactor KM7, cut off the faulty components, and the lithium battery system will provide power to ensure the normal operation of the device.

[0018] 5. Charging status

[0019] The entire device only needs to close the charging contactor KM5 and the main negative contactor KM2 to charge the lithium battery system through the charging interface.

Claims

1. An integrated high-pressure controlled hydrogen fuel cell power device, comprising a fuel cell module, a boost module, a heater, a water pump, a hydrogen pump, and an air compressor pump, wherein the hydrogen pump is connected to a hydrogen pump controller, the air compressor pump is connected to an air compressor pump controller, and the heater, water pump, hydrogen pump controller, and air compressor pump controller are all connected to the negative terminal of the boost module; an energy storage unit is provided, the negative electrode of the energy storage unit is connected to a charging port, a battery accessory, and an all-in-one unit, and is characterized in that: A vehicle control unit is provided, which is directly connected to the energy storage unit, fuel cell module, heater and water pump and is connected to the air compressor pump controller, hydrogen pump controller and boost module through a low-voltage self-test control unit; a high-voltage control unit is provided, which integrates a main positive contactor KM1, a main negative contactor KM2, a pre-charge contactor KM3, a battery accessory contactor KM4, a charging contactor KM5, a fuel cell main positive contactor KM6, a fuel cell main negative contactor KM7, fuses FU1-FU6 and a pre-charge resistor R1. The positive end of the boost module is connected to the positive electrode of the energy storage unit in turn through the fuel cell main positive contactor KM6, the parallel main positive contactor KM1 and the pre-charge contactor KM3. The charging contactor KM3 branch is connected in series with the pre-charge resistor R1. The negative end of the boost module It is connected to the negative pole of the energy storage unit through the fuel cell main negative contactor KM7 and the main negative contactor KM2 in sequence. The positive end of the boost module is connected to the air compressor pump controller, hydrogen pump controller, water pump and heater respectively through fuses FU3-FU6. The positive end of the boost module is connected to the all-in-one unit through the fuel cell main positive contactor KM6 and fuse FU2. The positive pole of the energy storage unit is connected to the battery accessories through the battery accessory contactor KM4. The positive pole of the energy storage unit is connected to the charging interface through the charging contactor KM5. The low-voltage self-test control unit provides control signals to the main positive contactor KM1, the main negative contactor KM2, the pre-charging contactor KM3, the battery accessory contactor KM4, the charging contactor KM5, the fuel cell main positive contactor KM6 and the fuel cell main negative contactor KM7.

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