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A kind of auxiliary system of fuel cell and shutdown cathode fast purging method

An auxiliary system and fuel cell technology, which is applied to fuel cells, circuits, electrical components, etc., can solve the problems of corrosiveness of the catalytic layer and carbon carrier, and achieve the effect of facilitating normal startup, less modification, and facilitating integration.

Active Publication Date: 2022-02-18
河南豫氢动力有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once hydrogen and air exist on both sides of the stack membrane, an open circuit voltage (>1V) will be generated, which is corrosive to the catalytic layer and carbon carrier of the fuel cell stack.

Method used

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  • A kind of auxiliary system of fuel cell and shutdown cathode fast purging method
  • A kind of auxiliary system of fuel cell and shutdown cathode fast purging method

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] see Figure 1-2 , the present invention provides a technical solution: a fuel cell auxiliary system and shutdown cathode fast purging device, including: air filter 1, air flow meter 2, air compressor 3, intercooler 4, air bypass valve 5 , humidifier 6, stack air-in temperature sensor 7, stack empty humidity sensor 8, air back pressure valve 9, stack 10, stack water outlet temperature sensor 11, water pump 12, electric three-way valve 13, heat dissipatio...

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Abstract

The invention discloses a fuel cell auxiliary system and a fast cleaning method for cathodes during shutdown, comprising: an air filter, an air flow meter, an air compressor, an intercooler, an air bypass valve, a humidifier, and a stack air inlet temperature sensor, electric stack empty humidity sensor, air back pressure valve, electric stack, electric stack water outlet temperature sensor, water pump, electric three-way valve, radiator, voltage sensor, AC impedance, current sensor, auxiliary system and shutdown of the present invention The cathodic purging method requires few changes to the system, and the components are simple, which is favorable for integration. When the fuel cell is shut down, the battery stack can be quickly dried up to facilitate the next normal startup, and it can play an important role in the field of fuel cell vehicles.

Description

technical field [0001] The invention relates to the technical field of fuel cell systems, in particular to a fuel cell auxiliary system and a method for quickly purging cathodes during shutdown. Background technique [0002] When the fuel cell system is running, the stack generates water on the cathode side through an electrochemical reaction. When the fuel cell system is shut down, the water on the cathode side of the stack needs to be blown dry to avoid flooding of the stack at the next startup and ensure normal startup. [0003] When the fuel cell system is applied on the vehicle, the vehicle is generally not equipped with nitrogen, so the stack is usually purged with air. Once hydrogen and air exist on both sides of the stack membrane, an open circuit voltage (>1V) will be generated, which is corrosive to the catalytic layer and carbon support of the fuel cell stack. Therefore, it is necessary to load current on the busbar of the stack during shutdown to reduce the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04228H01M8/04303H01M8/04119
CPCH01M8/04228H01M8/04303H01M8/04179Y02E60/50
Inventor 汪飞杰张洋谷军张靖罗欣郭彪
Owner 河南豫氢动力有限公司
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