An auxiliary structure based on a manufacturing process for improving the robustness of a fuel cell metal polar plate

Abstract

An auxiliary structure based on a manufacturing process for improving the robustness of a fuel cell metal polar plate is disclosed, and the auxiliary structure includes a positioning hole reinforcingstructure arranged on the metal electrode plate, a MEA depression inhibiting structure, a sealant ring lateral slip inhibiting structure, a sealing feature reinforcing structure, and a primer overflowinhibiting structure. A metal electrode plate position hole reinforcing structure enables a positioning block to withstand a tangential force in the assembly process without deformation; The MEA concave restraining structure is used to reduce the span distance between the air inlet and the flow field area, avoid the concave deformation during MEA assembly, and affect the gas flow. A lateral slipinhibit structure of the sealant ring is use for inhibiting lateral slip of the sealant ring during compression; The sealing feature reinforcing structure is used for increasing the strength of the side wall of the sealing groove and improving the structural stability of the assembly process; The overflow inhibiting structure of the primer is used for increasing the accommodation space of the primer and reducing the occurrence of the overflow. The design can improve the structural strength and stability of the metal plate comprehensively.

Description

technical field [0001] The invention relates to the technical field of vacuum coating equipment, in particular to an auxiliary structure based on a process for improving the robustness of a metal plate of a fuel cell. Background technique [0002] The basic working principle of fuel cells is to generate electricity through the electrochemical reaction of hydrogen and oxygen. Since the overall process achieves zero emissions, fuel cells have become an important part of the current new energy. The battery plate is an important part of the fuel cell as a carrier of the reaction medium and transmission of electric energy. The traditional plate is made of graphite, but due to the large volume and mass of graphite, it limits the application of fuel cells in compact spaces, such as environment such as cars. Due to its good mass-to-power ratio and volume-to-power ratio, metal plates gradually replace graphite plates as the main source of fuel cell plates. [0003] The existing met...

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Problems solved by technology

For example, see figure 1 , different from the graphite plate solid structure 1', the metal plate is mostly a grooved shell, see the metal plate grooved shell structure 2' in the figure, its own rigidity is low, and it is necessary to introduce a structural rigidity enhancement design; Also, see figure 2 , due to the thick base material of the graphite plate, the positioning hole structure 3' of the graphite plate does not need structural assistance, and the positioning hole structure 4' of the metal plate is processed according to the graphite plate. The positioning hole of the metal plate matched with the auxiliary structure has poor rigidity and is prone to deformation so that it cannot be positioned accurately; see image 3 , for the preparation and positioning of the sealing rubber ring 7', due to the inclination angle of the side wall after the metal plate is stamped and formed, the sealing groove structure 6' of the metal plate is greatly changed compared with the sealing groove structure 5' of the graphite plate , in order to prevent the slippage of the sealing rubber ring 7', it is also necessary to change the original design

To sum up, due to the particularity of the preparation process, the metal plate is quite different from the graphite plate in terms of characteristic structure, so the original design concept for the graphite plate cannot be applied to the robust manufacturing of the metal plate. Cheng craft

[0004] After searching the literature of the existing technology, it is found that there are few related patents on the auxiliary structure for improving the robustness of the fuel cell metal plate manufacturing process

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