An auxiliary structure based on improving the robustness of fuel cell metal plates

Abstract

The invention discloses an auxiliary structure based on the process of improving the robustness of the metal pole plate of a fuel cell, including a positioning hole reinforcement structure arranged on the metal pole plate, an MEA depression suppression structure, a sealing rubber ring lateral slip suppression structure, a sealing Features reinforced structure and undercoating adhesive overflow suppression structure. The reinforced structure of the positioning hole of the metal plate enables the positioning block to withstand the tangential force during the assembly process without deformation; the MEA depression suppression structure is used to reduce the span distance from the gas port to the flow field area, and avoid the concave deformation of the MEA during assembly, which affects the gas flow; the sealant The lateral slip suppression structure of the sealing ring is used to suppress the lateral sliding of the sealing rubber ring during the compression process; the sealing feature strengthening structure is used to increase the strength of the side wall of the sealing groove and improve the structural stability of the assembly process; the primer overflow suppression structure is used In order to increase the accommodation space of the primer and reduce the occurrence of glue overflow. This design can comprehensively improve the structural strength of the metal pole plate and improve the stability of the metal pole plate.

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...

AI Technical Summary

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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