A method for starting a proton exchange membrane fuel cell at low temperature

A proton exchange membrane and fuel cell technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of increasing the volume and quality of the battery system, the incomplete reaction of the mixed gas, and the impact on the structure and performance of the battery, etc. Problems, to achieve the effect of fast low-temperature start-up, reduce low-temperature start-up power consumption, and improve utilization
CN108711630BActive Publication Date: 2021-03-16DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2021-03-16

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Abstract

The invention relates to a method for starting a proton exchange membrane fuel cell under a low-temperature state. A mixed gas is introduced to a positive electrode for catalytic pre-heating, a tail gas of the positive electrode is introduced to a negative electrode, so that the mixed gas which does not react generates catalytic reaction in the negative electrode, and the effect of simultaneouslyrising temperatures of the negative electrode and the positive electrode is achieved. The method is improved on the basis of a traditional catalytic cold-starting method, the negative electrode and the positive electrode can simultaneously generate catalytic reaction, heat is provided for the cell, low-temperature starting at -45 DEG C even a lower temperature range can be achieved, fuel can be fully utilized, the starting power consumption of the cell is reduced, and the low-temperature starting time is greatly reduced.
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Description

technical field

[0001] The invention relates to the technical field of fuel cells, in particular to a method for improving the cold start of catalytic reactions of proton exchange membrane fuel cells. Background technique

[0002] Proton exchange membrane fuel cell (PEMFC) can directly convert fuel hydrogen and chemical energy in the air into electrical energy. It has the characteristics of high energy conversion efficiency and no pollution. In our country to achieve the goal of energy saving, emission reduction, low carbon and environmental protection. The proton exchange membrane fuel cell is an extremely complex system, and its application in the automotive field will inevitably face difficulties such as storage and start-up under low temperature conditions. The single-cell structure of PEMFC generally includes an anode catalytic layer, a cathode catalytic layer and a proton exchange membrane. Both the anode catalytic layer and the cathode catalytic layer contain catalys...

Claims

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