Preparation method of bipolar plate of fuel cell

A fuel cell and bipolar plate technology, which is applied to fuel cells, fuel cell components, circuits, etc., can solve the problems of large thickness, easy damage and high cost of bipolar plates, and achieve volume power density improvement, cost saving, The effect of high yield

Active Publication Date: 2022-03-15
HAIDRIVER (SHANGHAI) ENERGY TECH CO LTD
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a fuel cell bipolar plate to solve the problems of large thickness, heavy weight, easy damage, and high cost of the bipolar plate processed by the existing method

Method used

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  • Preparation method of bipolar plate of fuel cell
  • Preparation method of bipolar plate of fuel cell
  • Preparation method of bipolar plate of fuel cell

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Embodiment

[0030] see figure 1 , 2 , the process flow of the fuel cell bipolar plate preparation method provided in this embodiment is as follows figure 1 As shown, the fuel cell bipolar plate 101 prepared by the fuel cell bipolar plate preparation method of this embodiment is as follows figure 2 As shown, the method includes the following steps in turn:

[0031] S1. Simultaneously carry out groove pre-rolling of the cathode flow field and anode flow field on both sides of the flexible graphite coil 020. The pre-rolling adopts the first rolling die 010 in the figure, and the initial thickness of the flexible graphite coil 020 is 1.5 -3.0mm, the thickness of the flexible graphite coil 020 after pre-rolling is reduced to 1.2-1.6mm, and the maximum depth of the grooves of the anode flow field and the cathode flow field formed by the pre-rolling of the flexible graphite coil 020 is 0.3 -0.5mm.

[0032] S2. Simultaneously carry out the second groove rolling of the cathode flow field and ...

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Abstract

The invention provides a preparation method of a bipolar plate of a fuel cell. The method comprises the following steps: synchronously carrying out groove pre-rolling of a cathode flow field and an anode flow field on two surfaces of a flexible graphite coiled material; synchronously carrying out secondary groove rolling of a cathode flow field and an anode flow field on two surfaces of the pre-rolled flexible graphite coiled material; cutting an oxidant inlet / outlet, a fuel inlet / outlet and a cooling liquid inlet / outlet of the flexible graphite coiled material subjected to secondary rolling, and cutting the flexible graphite coiled material into a bipolar plate shape to obtain a flexible graphite bipolar plate; carrying out vacuum treatment on the flexible graphite bipolar plate, discharging air in a graphite material, then carrying out resin infiltration on the whole plate, and then cleaning and curing the infiltrated bipolar plate; and carrying out synchronous attachment of an anode reinforcing sheet and a cathode reinforcing sheet on the cleaned and cured flexible graphite bipolar plate to obtain a finished product of the fuel cell bipolar plate. According to the preparation method, automatic operation can be adopted, the quality is stable and controllable, and the yield is high; and the produced bipolar plate is thin, light, high in strength, not easy to damage and relatively low in overall cost.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing a fuel cell bipolar plate. Background technique [0002] The bipolar plate is one of the core components of the proton exchange membrane fuel cell (PEMFC). Its main function is to transport gas through the flow field on the surface, collect and conduct the current, heat and water generated by the reaction. According to the functional requirements of the bipolar plate, and considering that the electrochemical reaction environment of PEMFC is acidic, there are high requirements for the thickness, electrical conductivity, air tightness, mechanical properties, and corrosion resistance of the bipolar plate. In PEMFC, the bipolar plate is the heaviest and thickest part, which determines the volume and weight of the PEMFC. It is difficult to process a bipolar plate with a thickness of less than 2mm in the existing technology. Moreover, due to the unreasonable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0202H01M8/0213
CPCH01M8/0202H01M8/0213Y02E60/50
Inventor 朱维谢佳平沈军任致行赵小震
Owner HAIDRIVER (SHANGHAI) ENERGY TECH CO LTD
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