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Low-temperature starting method of fuel cell stack

A fuel cell stack and low-temperature technology, which is applied to fuel cells, circuits, electrical components, etc., can solve the problems of increasing the complexity of the system structure and improving energy consumption, and achieve the effect of rapidly heating the stack and increasing energy consumption

Active Publication Date: 2020-10-02
国鸿氢能科技(嘉兴)股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a low-temperature start-up method of a fuel cell stack to solve the technical problem that the existing low-temperature start-up method of the fuel cell will increase the complexity of the system structure and increase energy consumption. control, which can effectively realize the normal start-up of the fuel cell at low temperature

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  • Low-temperature starting method of fuel cell stack

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Embodiment Construction

[0030] 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 creative efforts fall within the protection scope of the present invention.

[0031] In the description of the present application, it should be understood that the terms "first", "second", "third", etc. Indicates the number of technical characteristics. Thus, a feature defined by "first", "second", "third", etc. may expressly or implicitly include one or more of that feature.

[0032] It should be noted that, unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly underst...

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Abstract

The invention discloses a low-temperature starting method of a fuel cell stack. The low-temperature starting method comprises the following specific steps of respectively introducing a reaction gas into a hydrogen cavity and an air cavity of the stack; running a first preset discharge step to enable a reaction region to be filled with the reaction gas, and starting a sensitive period through the stack; operating a second preset discharging step for multiple times to achieve the purpose of quickly preheating the stack; and operating the third preset discharging step for multiple times to finishthe normal starting process of the stack. According to the low-temperature starting method of the fuel cell stack, the current density of the discharge current is effectively controlled for multipletimes, the waste heat of the stack is utilized to the maximum extent at stages under the condition that the single stack is not reversed in polarity, the proportion of external output energy is adjusted, an additional auxiliary heating device is not added, energy consumption does not need to be increased, and the normal starting of a fuel cell in a low-temperature state is achieved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a low-temperature start-up method for a fuel cell stack. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy. It is not limited by the Carnot cycle effect. It uses fuel and oxygen as raw materials; there are no mechanical transmission parts, so there is no noise pollution, and the harmful emissions are Very little gas. Proton exchange membrane fuel cell has attracted more and more attention in recent years because of its low-temperature start-up, simple structure, and easy operation. [0003] Start the fuel cell at low temperature, because the water generated by the cathode of the battery will freeze due to the low temperature and cannot be removed from the battery. The accumulated ice will damage the internal structure of the fuel cell, resulting in the failure of the fuel cell at low temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04089H01M8/04223H01M8/04225H01M8/04302H01M8/04858
CPCH01M8/04089H01M8/04268H01M8/04895H01M8/04225H01M8/04302Y02E60/50
Inventor 崔士涛邓存柏瞿丽娟陈允至黄志华
Owner 国鸿氢能科技(嘉兴)股份有限公司
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