Fuel cell stack assembly method

Abstract

A fuel cell stack assembly method comprises the following steps: fixing an external locating tool for stack assembly on a pressure applying device, sequentially putting stack components into the external locating tool and piling up the stack components, enabling the pressure applying device to apply pressure to the piled stack components in the external locating tool to the set pressure value, respectively fastening integrated packaging side plates at the periphery of a stack for packaging at the pressure value, removing the pressure of the pressure applying device and the external locating tool, taking out the packaged stack, and completing the assembly. The fuel cell stack assembly method has the benefits that the fuel cell stack requiring large assembly force can be assembled only through simple operation, so that the assembly efficiency of the fuel cell stack is remarkably improved; external locating guarantees the alignment of the fuel cell stack components so as to be good for guaranteeing the quality of the stack; the packaging plates at the periphery of the stack does not deform easily when bearing the assembly force of the stack, so as to be good for guaranteeing the composite design value of the fastening force after the assembly of the stack, and the assembly force is applied at the periphery of the stack by the packaging plate compared with a screw or a bundling belt, the assembly force is better uniformly distributed.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to an assembly method of a proton exchange membrane fuel cell stack. Background technique [0002] In the prior art, the fuel cell stack assembly method is usually tightened after pressurization. Generally, after pressing the end plate, collector plate and multi-section single cells, they are directly welded together by ultrasonic microwave. Its shortcomings are: 1) When the stack fails, it can only destroy the package, which is not convenient for maintenance and increases the cost; 2) When the internal components of the stack are aging or the operating conditions of the stack are changed, the assembly force is reduced, and there is no improvement method , stack life is difficult to guarantee. [0003] To provide a practical, efficient and accurate fuel cell stack assembly method is an urgent technical problem to be solved in stack assembly. Contents of the invention [0004...

AI Technical Summary

Problems solved by technology

Its shortcomings are: 1) When the stack fails, it can only destroy the package, which is not convenient for maintenance and increases the cost; 2) When the internal components of the stack are aging or the operating conditions of the stack are changed, the assembly force is reduced, and there is no improvement method , the life of the stack is difficult to guarantee

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