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A fuel cell stack system and starting method

A fuel cell stack and valve body technology, which is applied to fuel cells, fuel cell groups, circuits, etc., can solve the problems of poor infrared characteristics, uneven temperature rise, and low energy utilization rate of the system, and achieve good infrared characteristics and temperature rise. Uniform, simple scheme effect

Active Publication Date: 2022-05-17
BEIJING MECHANICAL EQUIP INST
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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a fuel cell stack system and start-up method to solve the problems of uneven temperature rise, low energy utilization rate and poor infrared characteristics of the system in the existing auxiliary start-up measures

Method used

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  • A fuel cell stack system and starting method

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Embodiment 1

[0055] During the start-up process of the high-temperature stack, open valve 1, valve 2, valve 3, and valve 4, and close valve 5 and valve 6, so that low-temperature hydrogen and low-temperature air first pass through the normal-temperature stack reaction. The working temperature of the normal-temperature stack is low, and the starting performance is good. After the hydrogen and air react in the normal-temperature stack, the high-temperature stack is heated in the following three ways: (1) Inside the normal-temperature stack, hydrogen reacts electrochemically with the air to output electric energy , supplied to the electric heating plate installed inside and at the end of the high-temperature stack, and the high-temperature stack is heated through the resistance thermal effect; (2) The excess coefficient of hydrogen and air passing through the inside of the normal-temperature stack is large, and after the reaction, the electrochemical reaction The heat generated will heat the r...

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Abstract

The invention relates to a fuel cell stack system and a start-up method, belonging to the technical field of fuel cells, and solves the problems of uneven temperature rise, low energy utilization rate and poor infrared characteristics of the system in the auxiliary start-up measures in the prior art. The fuel cell stack system of the present invention includes a first fuel cell stack and a second fuel cell stack, the operating temperature of the first fuel cell stack is lower than the operating temperature of the second fuel cell stack, and the first fuel cell stack The stack provides heat for start-up of the second fuel cell stack in more than one way. In the starting method of the fuel cell stack of the present invention, the energy generated by the electrochemical reaction of the first fuel cell stack assists the starting of the second fuel cell stack in three ways: air intake, cooling cycle and electric heating. The invention realizes the quick start of the high-temperature battery stack, and the temperature rise of the battery is uniform, the energy utilization rate of the system is significantly improved, and the infrared characteristic is good.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell stack system and a starting method. Background technique [0002] The working temperature of high-temperature proton exchange membrane fuel cells is above 100°C. The higher working temperature makes the electrochemical reaction faster, the water heat management system simpler, the waste heat recovery efficiency higher, and the CO tolerance stronger. energy solutions. [0003] However, the high operating temperature makes its startup process relatively long, which limits its application range. Therefore, auxiliary measures are needed to accelerate the start-up of high-temperature proton exchange membrane fuel cells. There are three main methods in the existing technical solutions: 1) internal resistance heating, increase the internal resistance of the battery, and use the resistance heating effect to speed up its startup process; 2) use the intake burner to pass t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04223H01M8/24H01M8/04302
CPCH01M8/04268H01M8/04302H01M8/24Y02E60/50
Inventor 黄浩李跃华马泽陈鑫凯
Owner BEIJING MECHANICAL EQUIP INST
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