Fuel cell system and performance improvement method of fuel cell system
A fuel cell system and fuel cell technology, applied in the direction of fuel cells, fuel cell control, fuel cell grouping, etc., can solve the problems of electrode catalyst performance degradation, etc.
Inactive Publication Date: 2020-04-10
TOYOTA JIDOSHA KK
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Problems solved by technology
[0003] When the electrode catalyst of the cathode of a single fuel cell is used, an oxide film is formed on the surface of the electrode catalyst, which causes performance deterioration of the electrode catalyst
Method used
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Embodiment Construction
[0042] refer to figure 1 , the fuel cell system A includes a fuel cell stack 10 . The fuel cell stack 10 includes a stacked body including a plurality of individual fuel cells 2 stacked in a stacking direction. Each of the individual fuel cells 2 of the stack includes: a membrane electrode gas diffusion layer assembly 20 ; and separators (not shown) arranged on opposite sides of the membrane electrode gas diffusion layer assembly 20 . The membrane electrode gas diffusion layer assembly 20 includes: an electrolyte membrane; and an anode and a cathode arranged on opposite sides of the electrolyte membrane.
[0043] The anode of one single fuel cell 2 is electrically connected to the cathode of another single fuel cell 2 adjacent to the single fuel cell 2 on the first side of the stack through the separator, and the cathode of the single fuel cell 2 is electrically connected through the separator. The anode of another individual fuel cell 2 adjacent to the individual fuel cell ...
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A fuel cell system and a performance improvement method of the fuel cell system are disclosed. The fuel cell system includes: a processing unit configured to perform an activation process of temporarily reducing a cathode potential of a single fuel cell to a target potential for a duration time at a processing frequency; a cationic impurity amount estimating unit configured to estimate an amount of cationic impurities included in an electrolyte membrane of the single fuel cell; and a process degree determining unit configured to determine, when the amount of cationic impurities is large, a degree of the activation process which is higher than that determined when the amount of cationic impurities is small by performing at least one action among actions of changing conditions of the activation process, the actions including an action of reducing the target potential, an action of increasing the duration time, and an action of increasing the processing frequency. The processing unit performs the activation process to the determined degree.
Description
technical field [0001] The invention relates to a fuel cell system and a method for improving the performance of the fuel cell system. Background technique [0002] There is known a fuel cell system configured to perform, for a sustained period of time, an activation process that temporarily lowers the cathode potential of at least one individual fuel cell in the fuel cell system to a target potential to improve the individual fuel cells. Performance of an electrode catalyst in a battery (for example, refer to the Japanese translation of the publication of PCT Application No. 2003-536232 (JP-A-2003-536232)). [0003] When the electrode catalyst of the cathode of a single fuel cell is used, an oxide film is formed on the surface of the electrode catalyst, which causes performance degradation of the electrode catalyst. In the activation process described above, by temporarily lowering the cathode potential in a single fuel cell, the electrode catalyst is reduced, the oxide fi...
Claims
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IPC IPC(8): H01M8/24H01M8/04298H01M8/04694H01M8/04858
CPCH01M8/04298H01M8/04694H01M8/04858H01M8/04873H01M8/24Y02E60/50
Inventor 城森慎司
Owner TOYOTA JIDOSHA KK