Insulation structure based on fuel cell

Abstract

The invention relates to an insulation structure based on a fuel cell. The insulation structure comprises a cell body, the cell body comprises a cell stack core, a cell shell, a collector plate, an insulation plate and a lower end plate, the cell stack core, the collector plate, the insulation plate and the lower end plate are located in the cell shell, and the collector plate, the insulation plate and the lower end plate are arranged in sequence; an insulation polyester film is arranged between the insulation plate and the lower end plate, and a plurality of humidity control sheets are arranged on the inner walls of the two sides of the motor shell. Compared with the prior art, the structure has the advantages that the insulation property of the fuel cell stack is improved, the situation of water vapor condensation on the inner wall of the stack shell is avoided, and the risk of insulation failure of the fuel cell is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an insulating structure based on fuel cells. Background technique [0002] The proton exchange membrane fuel cell is a kind of electrochemistry that decomposes anode hydrogen into protons and electrons through a catalyst. device. The introduction of reactants on both sides of the stack, the exhaust of exhaust gas, and the circulation of coolant need to be realized through public pipes. The fuel cell stack uses a sealing ring formed of silicone rubber or EPDM rubber to ensure the overall sealing effect of the stack. , the sealing ring cannot completely guarantee zero leakage, and the overall stack still has water vapor leakage, which means that the insulation effect of the stack will be lower than the design index, which will seriously lead to the failure of the stack insulation. [0003] In the prior art, the insulation is generally enhanced by adding an insulating plate bet...

AI Technical Summary

Problems solved by technology

The introduction of reactants on both sides of the stack, the exhaust of exhaust gas, and the circulation of coolant need to be realized through public pipes. The fuel cell stack uses a sealing ring formed of silicone rubber or EPDM rubber to ensure the overall sealing effect of the stack. , the sealing ring cannot completely guarantee zero leakage, and the overall stack still has water vapor leakage, which means that the insulation effect of the stack will be lower than the design index, which will seriously lead to the failure of the stack insulation

[0003] In the prior art, the insulation is generally enhanced by adding an insulating plate between the current collector plate and the lower end plate. Considering the influence of the volumetric power density of the stack, it cannot be made very thick, so there is still a risk of insulation failure; There is water vapor condensation on the inner wall of the stack shell, which increases the humidity inside the stack and causes the risk of water vapor condensation, which will also lead to insulation failure

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