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Fuel cell cold start anode purging device and purging method

A technology of fuel cells and fuel cell stacks, applied in fuel cells, circuits, electrical components, etc., can solve problems such as hydrogen waste, achieve the effects of reducing operating costs, improving life, and ensuring stable output

Active Publication Date: 2019-08-16
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a fuel cell cold start anode purging device, which effectively solves the problem of hydrogen waste during the purging process and ensures the stable output of fuel cell stack performance

Method used

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  • Fuel cell cold start anode purging device and purging method

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Embodiment 1

[0043] In a typical embodiment of the present invention, such as figure 1 As shown, a fuel cell cold-start anode purge device includes a nitrogen purge system connected to the hydrogen circulation system. The nitrogen purge system uses nitrogen purge. The system includes a nitrogen tank 9 and a second solenoid valve 10 connected in sequence. , the second decompression valve 11 , the second flow meter 12 , the second flow meter 12 is connected with the first integrated temperature, pressure and humidity sensor 13 in the hydrogen circulation system, and further connected with the inlet of the fuel cell stack 14 .

[0044] The nitrogen purge system also includes a second temperature-pressure-humidity integrated sensor 15 and a three-way valve 17, the second temperature-pressure-humidity integrated sensor 15 is connected to the inlet of the three-way valve 17, the three-way valve 17 is a three-way solenoid valve, and the three-way solenoid The inlet of the valve is connected to th...

Embodiment 2

[0052] A fuel cell cold-start anode purging method, using the fuel cell cold-start anode purging device described in Embodiment 1, comprising the following content:

[0053] When the fuel cell is shut down, it can immediately switch to the nitrogen purge system, the first solenoid valve in the hydrogen circulation system is closed, the second solenoid valve in the nitrogen purge system is opened, and the nitrogen purge system is turned on; The cooling water of the fuel cell heat dissipation system heats the fuel cell stack. When the temperature of the cooling water reaches the set value, the nitrogen purge system is turned on; after being released from the nitrogen tank, the nitrogen flows through the second solenoid valve and the second pressure reducing valve. , the second flow meter, the first temperature-pressure-humidity integrated sensor, the purged fuel cell stack, and the second temperature-pressure-humidity integrated sensor reach the three-way solenoid valve 17, and t...

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Abstract

The invention discloses a fuel cell cold start anode purging device and a purging method, which solve the problem of hydrogen waste in fuel cell purging in the prior art, and have the beneficial effect of ensuring stable output of fuel cell stack performance. The fuel cell cold start anode purging device comprises a nitrogen purging system and a pressure release valve. The nitrogen purging systemcomprises a nitrogen container, wherein the nitrogen container can be connected with a fuel cell stack inlet; a fuel cell stack outlet can be connected to an inlet of a three-way valve, and an outletof the three-way valve is communicated with a gas-liquid separator and a liquid storage tank; the gas-liquid separator is connected with an ejector or a circulating pump; the pressure release valve isarranged in a gas circulation system; a pressure release valve inlet can be connected with the fuel cell stack inlet; and a fuel cell stack outlet is communicated with the external environment through a liquid storage tank.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell cold-start anode purge device and a purge method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Proton exchange membrane fuel cell (PEMFC) has the advantages of environmental protection, high energy density, high power generation efficiency, and fast start-up speed, and is considered to be one of the most potential future vehicle power sources. In practical applications, due to the low output power of a single-chip PEMFC, multiple single cells are connected in series to meet the user's demand for power or voltage in the form of a battery stack. [0004] When the PEMFC is shut down, it is required that there should be no liquid water in the stack, otherwise the membrane electrode may be damaged after freezing in a low temperature environ...

Claims

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Application Information

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IPC IPC(8): H01M8/04119H01M8/04223H01M8/04225H01M8/04228H01M8/04302H01M8/04303
CPCH01M8/04156H01M8/04253H01M8/04225H01M8/04228H01M8/04302H01M8/04303Y02E60/50
Inventor 白书战李国祥张国栋刘洪建王桂华闫伟胡玉平孙强周博孺
Owner SHANDONG UNIV
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