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Quick cold start system and quick cold start method for fuel cell

A fuel cell and cold start technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as long start-up time, achieve the effects of lowering output efficiency, improving structural design, and increasing heating rate

Pending Publication Date: 2020-09-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method first needs to add additional accessories, which increases the complexity, cost, and power consumption of the system, and the startup time is generally longer

Method used

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  • Quick cold start system and quick cold start method for fuel cell
  • Quick cold start system and quick cold start method for fuel cell

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Embodiment

[0027] This embodiment provides a fuel cell rapid cold start system and its control method. The fuel cell rapid cold start system includes a controller and an air subsystem and a hydrogen subsystem respectively connected to the stack 1. The air subsystem includes a back pressure valve 7 and the air filter 2, air compressor 4, intercooler 5 and air intake shut-off valve 6 connected in sequence, the intake air shut-off valve 6 is connected with the air inlet of the electric stack 1, and the back pressure valve 7 is respectively connected with the exhaust pipe 8 and the The air outlet of the electric stack 1 is connected, and the hydrogen subsystem includes a water separator 18, a drain solenoid valve 17, a proportional valve 15 and an ejector 16 connected in sequence, and the ejector 16 is connected with the hydrogen inlet of the electric stack 1, and the water separator 18 are respectively connected to the hydrogen outlet of the electric stack 1, the ejector 16 and the drain sol...

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Abstract

The invention relates to a rapid cold start system and a rapid cold start method for a fuel cell. The system comprises a controller, and an air subsystem and a hydrogen subsystem which are respectively connected with an electric pile; the air subsystem comprises a back pressure valve, an air filter, an air compressor, an intercooler and an air inlet stop valve, wherein the air filter, the air compressor, the intercooler and the air inlet stop valve are sequentially connected. The air subsystem further comprises an air inlet adjusting valve, the air inlet adjusting valve is connected with the air filter and the air compressor, and the controller controls the air inlet adjusting valve. The method comprises the steps that the controller controls the opening degree of the air inlet adjusting valve, so the excess air coefficient is controlled to reduce the external output efficiency of the fuel cell; meanwhile, the compression ratio of the air compressor is adjusted, and the power consumption of the air compressor is increased to increase the air inlet temperature. Compared with the prior art, the method can achieve the rapid cold starting without auxiliary preheating and the success rate of cold starting.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell fast cold start system and a fast cold start method. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of fuel into electrical energy. The fuel cell system has high energy conversion efficiency and is an ideal energy utilization method. There is a broad prospect for commercial application. For a vehicle-mounted fuel cell system, fast cold start performance is required. At present, the main problem of cold start is that during the start-up process of the stack, the water generated in the fuel cell flow channel, the gas diffusion layer and the catalytic layer freezes, causing the reaction to stop, resulting in start-up failure; in addition, there are also parts that freeze during the start-up process and cause the system to start risk of failure. [0003] At present, the methods of cold start are mainly external...

Claims

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Application Information

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IPC IPC(8): H01M8/04223H01M8/04791H01M8/04119H01M8/04007
CPCH01M8/04268H01M8/04253H01M8/04074H01M8/04156H01M8/04798Y02E60/50
Inventor 马天才朱东丛铭
Owner TONGJI UNIV
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