Method and system for removing residual water in fuel cell stack

一种燃料电池堆、燃料电池的技术，应用在燃料电池、燃料电池控制、燃料电池助剂等方向，能够解决降低燃料电池燃料效率、破坏气体扩散层、残留水没有充分排放等问题，达到防止发电、提高耐久性、提高燃料效率的效果

Pending Publication Date: 2020-04-21
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when the fuel cell is kept off in a state where the external temperature is extremely low, there is a problem in that the gas diffusion layer (GDL) is destroyed by volume expansion due to freezing of generated water remaining in the fuel cell stack.
[0006] According to such control, residual water in the fuel cell stack is not sufficiently discharged, or when air is excessively supplied, the amount of oxygen supplied to the hydrogen electrode of the fuel cell stack increases or the air compressor is excessively driven, thereby degrading the fuel cell stack. fuel efficiency, etc.

Method used

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  • Method and system for removing residual water in fuel cell stack
  • Method and system for removing residual water in fuel cell stack
  • Method and system for removing residual water in fuel cell stack

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Embodiment Construction

[0033] The specific structural and functional descriptions of the embodiments of the present disclosure disclosed in the specification or this application are only for the purpose of illustrating the embodiments of the present disclosure, and the embodiments according to the present disclosure can be embodied in various forms, and should not be interpreted are limited to the examples given in the specification or in this application.

[0034] In the embodiments according to the present disclosure, various modifications and various forms can be implemented, so that specific embodiments are illustrated and described in detail in the specification or the drawings of this application. However, it should be understood that this is not intended to limit embodiments of the concept according to the present disclosure to the specific forms disclosed, but includes all modifications, equivalents, and substitutions falling within the spirit and technical scope of the present disclosure.

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Abstract

A system and a method for removing residual water in a fuel cell stack are provided. The method includes: blocking, by an air compressor, air supply to a fuel cell stack upon shutting down of fuel cell; measuring a cell voltage of the fuel cell stack while the air supply is blocked; estimating an amount of residual water in the fuel cell stack based on the measured cell voltage of the fuel cell stack; and removing, by a driving controller, the residual water in the fuel cell stack by driving the air compressor based on the estimated amount of water.

Description

technical field [0001] The present disclosure relates to a method and system for removing residual water in a fuel cell stack, and more particularly, to a technique for removing residual water in a fuel cell stack to prevent freezing when a fuel cell is shut down. Background technique [0002] A fuel cell is a power generation device as a battery for directly converting chemical energy generated by oxidation of fuel into electrical energy. A fuel cell is basically the same as a chemical cell in that it uses an oxidation-reduction reaction, but differs from a chemical cell in which a battery reaction is performed in a closed system in that reactants are continuously supplied from the outside and thus reaction products are continuously supplied removed from the system. [0003] In recent years, a fuel cell power generation system has been commercialized, and a reaction product of the fuel cell is pure water, so that development of using it as an energy source for environment-...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04291H01M8/04298H01M8/04313H01M8/04694H01M8/04537H01M8/0432
CPCH01M8/04291H01M8/04298H01M8/04313H01M8/04694H01M8/04559H01M8/0432H01M2250/20H01M8/04179H01M8/04228H01M8/04303H01M8/04589H01M8/04753H01M8/04776H01M8/04828Y02E60/50H01M8/04156H01M8/04492H01M8/04552H01M8/04992H01M8/04955H01M8/04089
Inventor 柳昌锡金成道康敏绣权纯祐李东勋
Owner HYUNDAI MOTOR CO LTD
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