Shunting device of fuel cell stack

Abstract

The invention provides a shunting device of a fuel cell stack, which is suitable for the fuel cell stack and comprises an inlet buffer tank, a stack inlet valve group, a stack inlet pipeline group, an outlet buffer tank, a stack outlet valve group and a stack outlet pipeline group, wherein an inlet end of the stack inlet pipeline group penetrates through the stack inlet valve group and is connected with an outlet end of the inlet buffer tank, and an outlet end of the stack inlet pipeline group is connected with inlet ends of single cells of the fuel cell stack; and an inlet end of the stack outlet pipeline group is connected with outlet ends of the single cells of the fuel cell stack, and an outlet end of the stack outlet pipeline group penetrates through the stack outlet valve group and is connected with an inlet end of the outlet buffer tank. According to the shunting device of the fuel cell stack, first reactant passages of the single cells of the fuel cell stack can be independently controlled, when the single cells break down, the corresponding stack inlet valves and the corresponding stack outlet valves can be adjusted to close the broken-down single cells, normal operation of other single cells is not affected, and the overall performance of the fuel cell stack is slightly affected.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a flow splitting device for a fuel cell stack. Background technique [0002] The working principle of a fuel cell is to convert chemical energy into electricity by reacting the incoming fuel with oxygen. Generally, the gas source of the fuel cell stack is evenly distributed into each battery cell through the common cavity of the fuel inlet, passes through the flow channel in the battery and participates in the reaction, and the remaining gas flows out of the stack from the common cavity of the fuel cell stack outlet. [0003] At present, due to the influence of various factors, during the actual operation of fuel cell stacks on the market, abnormal operation of a single battery or several battery cells (such as low voltage, etc.) often occurs. If it is too long, it will easily lead to irreversible attenuation of the overall performance of the fuel cell stack, and even lead to...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the influence of various factors, during the actual operation of fuel cell stacks on the market, abnormal operation of a single battery or several battery cells (such as low voltage, etc.) often occurs. If it is too long, it will easily lead to irreversible attenuation of the overall performance of the fuel cell stack, and even lead to the scrapping of the entire battery stack. Heap" overhaul process

This maintenance process requires secondary disassembly and assembly of the fuel cell stack as a whole, which is complex and costly, and the secondary disassembly process will cause certain damage to the fuel cell stack as a whole, thus affecting the overall performance of the fuel cell stack

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