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Fuel cell system and cooling control method thereof

A technology of fuel cell system and fuel cell stack, which is applied in the direction of fuel cells, fuel cell additives, fuel cell components, etc., to prevent damage and realize the effect of power generation process

Active Publication Date: 2011-09-28
DOOSAN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, when the fuel cell system is started or stopped, a large amount of moisture may be supplied to the electrode layer of the fuel cell stack
Furthermore, even when the fuel cell system is driven under rated operating conditions, moisture may be excessively supplied, or it may suffer from moisture starvation
Therefore, the difficulty of this fuel cell system is to stably maintain the performance of power generation

Method used

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  • Fuel cell system and cooling control method thereof
  • Fuel cell system and cooling control method thereof
  • Fuel cell system and cooling control method thereof

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Embodiment Construction

[0030] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit and scope of the present invention.

[0031] figure 1 is a schematic diagram of a fuel cell system according to a first preferred embodiment of the present invention.

[0032] like figure 1 As shown, the fuel cell system 100 of the present preferred embodiment includes a fuel cell stack 110 in which an electrochemical reaction occurs, a fuel processing unit 120 that reforms power generation materials and provides hydrogen to the fuel cell stack 110, by cooperating with a compressor or a blower The oxygen supply unit 130, which supplies oxygen to the fuel cell stack 110, and the voltage converter 140, which converts the DC power generated by the fuel cell stack 110 in...

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Abstract

The present invention relates to a fuel cell system, and to a cooling control method of the fuel cell system. The cooling control method of the fuel cell system includes measuring a voltage generated from the fuel cell stack in accordance with a time variation, and maintaining an internal temperature of the fuel cell stack at a predetermined value in accordance with the measured voltage. The method may further include controlling a cooling water temperature difference. Herein, when the measured voltage is equal to or greater than a predetermined value, the cooling water is normally supplied, and when the measured voltage is less than the predetermined value, a difference between cooling water inlet and outlet temperatures of the fuel cell stack is varied by a controller. The deteriorationof the power generation performance due to the excessive moisture in the fuel cell stack can be prevented and thus the power generation can be effectively realized through the electrochemical reaction.

Description

technical field [0001] The present invention relates to a fuel cell system utilizing a proton exchange membrane fuel cell (PEMFC). In particular, the present invention relates to a fuel cell system and a cooling control method of the fuel cell system, which can generate a stable temperature by effectively removing moisture in electrode layers of the fuel cell stack or efficiently supplying a reaction gas to the fuel cell stack. of electrical energy. Background technique [0002] PEMFC utilizes a proton exchange membrane with hydrogen ion exchange properties as an electrolytic membrane. The PEMFC generates electrical and thermal energy by utilizing an electrochemical reaction between hydrogen-containing fuel gas and oxygen-containing air. The PEMFC has a fast start-up capability and can be designed in a small size. Therefore, the PEMFC has been widely used in various fields such as portable power sources, automobile power sources, and residential thermal power plants. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02
CPCH01M8/04559H01M8/0618H01M8/04156H01M2008/1095H01M8/04768H01M8/04089H01M8/04059H01M8/04358Y02E60/50H01M8/04029H01M8/04
Inventor 赵莹穆金淏硕李尚容洪炳善辛美男
Owner DOOSAN CORP