A fuel cell stack activation method
An activation method and fuel cell technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as time-consuming, reduce activation energy barrier, increase surface area, and shorten activation time
Active Publication Date: 2021-06-18
国鸿氢能科技(嘉兴)股份有限公司
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Problems solved by technology
[0004] The invention provides a fuel cell stack activation method to solve the technical problem that the existing proton exchange membrane fuel cell stack activation process takes a lot of time. By controlling the discharge current, the hydrogen reduction catalyst active point and low The process of strong potential polarization can quickly activate the stack and improve the use and production efficiency of proton exchange membrane fuel cells
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[0031] 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.
[0032] 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.
[0033] 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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The invention discloses a method for activating a stack of a fuel cell, which includes specific steps: loading the stack in sections; respectively preset a first loading load and a first unloading load, and load the stack to the first a loading load; unload the actual load of the electric stack to the first unloaded load; unload the actual load of the electric stack to zero; respectively preset the second loading load and the first air stoichiometric ratio; load the electric stack to the first The second loading load; adjusting the actual air stoichiometric ratio of the stack to the first air stoichiometric ratio; unloading the actual load of the stack to zero. The fuel cell stack activation method provided by the embodiment of the present invention greatly shortens the time by adjusting the discharge current differently and in a targeted manner, as well as reducing the active sites of the catalyst by hydrogen and activating the catalyst at a low potential. The activation time improves the production efficiency of the proton exchange membrane fuel cell.
Description
technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell stack activation method. 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] Since the activity of the fuel cell stack in the electrochemical reaction is very low during the initial operation, it is necessary to activate the stack under certain conditions in advance to ensure the normal initial performance of the fuel cell stack to the greatest extent. In the prior art, the activation method of the...
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IPC IPC(8): H01M8/04223H01M8/04007H01M8/04225H01M8/04302H01M8/04858
CPCH01M8/04037H01M8/04223H01M8/04895H01M8/04225H01M8/04302Y02E60/50Y02P70/50
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