A proton exchange membrane fuel cell shutdown control system and method
A proton exchange membrane, fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as hydrogen affecting battery life
Active Publication Date: 2020-06-26
浙江高成绿能科技有限公司
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Problems solved by technology
However, the problem that the residual hydrogen in the fuel cell stack and the pipeline after shutdown affects the battery life is not solved
Method used
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Embodiment 1
[0033] like figure 1 Shown is a schematic structural diagram of a 400W proton exchange membrane fuel cell, including a fuel cell stack 3, a blower 6 for supplying air, and an air intake solenoid valve 1 on a hydrogen pipeline 31 of the fuel cell stack. A first three-way solenoid valve 2 is provided between the intake port 311 of the fuel cell stack 3 and the intake solenoid valve 1 . The first through hole of the first three-way solenoid valve 2 is connected to the air inlet 311, the second through hole of the first three-way solenoid valve 2 is connected to the intake solenoid valve 1, and the third through hole of the first three-way solenoid valve 2 The hole is open to the air (for example, can be directly opened to the outside air). The first three-way solenoid valve 2 includes two passages, the first passage communicates with the first through hole and the second through hole, and the second passage communicates with the first through hole and the third through hole, and...
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The invention relates to the technical field of fuel cells, in particular to a proton exchange membrane fuel cell shutdown method. Shutdown steps are as follows: (1) keeping sufficient hydrogen supplyfor an anode side of a fuel cell stack, and keeping sufficient air supply for a cathode side of the fuel cell stack; (2) stopping the hydrogen supply for the anode side; (3) consuming hydrogen in thefuel cell stack by using auxiliary load discharging till the hydrogen in the fuel cell stack is completely consumed, and generating negative pressure in the fuel cell stack; (4) enabling air and residual hydrogen in a hydrogen pipeline to enter a fuel cell together through an air inlet by using the negative pressure for complete reaction, and enabling the air and residual hydrogen in an exhaust pipeline to enter the fuel cell stack together through an exhaust opening for complete reaction; (5) stopping the machine when the reactions end. The proton exchange membrane fuel cell shutdown methodcan effectively prevent the residual hydrogen in the pipelines from being diffused into an anode cavity and being in contact reaction with infiltrated air, and the service life of the fuel cell is prolonged.
Description
technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for shutting down a proton exchange membrane fuel cell. Background technique [0002] According to different electrolytes and structures, fuel cells are divided into alkaline fuel cells, molten carbonate fuel cells, solid oxide fuel cells, phosphoric acid fuel cells, metal air fuel cells and proton exchange membrane fuel cells, among which proton exchange membrane fuel cells are due to It has the advantages of rapid start-up at room temperature, high power density, low operating temperature, and no exhaust emissions. At present, the research on proton exchange membrane fuel cells is deepening, but there are still technical bottlenecks in its commercialization. How to improve the proton exchange membrane fuel cell Lifespan is one of the key issues. There are many factors affecting the life of the fuel cell, among which the residual hydrogen in the fuel cell stack and ...
Claims
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IPC IPC(8): H01M8/04223H01M8/04228
CPCH01M8/04228H01M8/04231Y02E60/50
Inventor 李叶涛侯向理张赫姚宇希
Owner 浙江高成绿能科技有限公司