Three-in-one vehicle-mounted DCDC integrated power supply

Abstract

The invention relates to a three-in-one vehicle-mounted DCDC integrated power supply. The three-in-one vehicle-mounted DCDC integrated power supply has the advantages that the fuel cell controller, the fuel cell air compressor and the fuel cell engine of a vehicle-mounted fuel cell system are connected with three DC / DC converters, the three DC / DC converters share a same integrated port to be connected with a power battery and can simultaneously provide three power supplies of different power levels and different voltage ranges, the power supplies work synergistically and operate stably to satisfy different-power use requirements, overall vehicle wiring harness arrangement and assembling are facilitated, and the three-in-one vehicle-mounted DCDC integrated power supply is simple in structure, low in space occupation, capable of achieving wiring, convenient to control and operate, low in cost and capable of satisfying integrated design and intelligent control requirements.

Description

technical field [0001] The invention relates to a three-in-one vehicle-mounted DCDC integrated power supply. Background technique [0002] As the problem of environmental pollution becomes more and more prominent, traditional petroleum energy can no longer meet the power demand of the current automobile industry. Fuel cells with superior performance are widely considered to be the best choice for future electric vehicle energy solutions; fuel cells are a kind of energy that will exist in The chemical energy in the fuel and oxidant is directly converted into a power generation device for electric energy. The fuel of the hydrogen fuel cell is hydrogen and oxygen, and the reaction product is only water. Therefore, the hydrogen fuel cell vehicle has achieved zero emission and zero pollution in the true sense. [0003] Due to the low output voltage of hydrogen fuel cells, large fluctuations, and relatively soft output characteristics; if the fuel cell is used as a direct drive po...

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Problems solved by technology

[0003] Due to the low output voltage of hydrogen fuel cells, large fluctuations, and relatively soft output characteristics; if the fuel cell is used as a direct drive power source for electric vehicles, a DC-DC converter with relatively hard output characteristics must be connected after the fuel cell. The fuel cell and the DC-DC converter form a unified power supply to supply power to the vehicle. The output of the fuel cell is an unstable DC low voltage, which needs to be converted into a stable high voltage by the DC / DC power supply and stored in the power battery. The fuel cell system starts The power battery needs to provide 12V auxiliary power to the fuel cell controller in advance, and the high voltage output by the power battery needs to be converted into 12V direct current by DC / DC power supply to provide power for the fuel cell controller, and the fuel cell controller has After power-on, it is also necessary to provide a working voltage of 300V to 375V for the air compressor of the fuel cell. Various power demand parameters are different. The fuel cell DC / DC converter in the prior art cannot meet various power demands at the same time, and the integration degree is not high. High, need to set converters separately for various power demands, 3 different power demands need 3 converter products, the whole vehicle layout space is crowded, installation and wiring are inconvenient

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