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Method for forming surface microstructure of fuel cell metal cathode plate

A metal cathode and fuel cell technology, applied in battery electrodes, structural parts, circuits, etc., can solve the problems of inability to meet the requirements of forming accuracy and high requirements for pore processing on the surface of metal cathode plates, and achieve low cost, small size, and accurate size control. Effect

Active Publication Date: 2019-05-21
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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AI Technical Summary

Problems solved by technology

[0004] However, the forming of the three-dimensional flow field has high requirements for the processing of the pores on the surface of the metal cathode plate, and the current rolling or stamping processing methods cannot meet the forming accuracy requirements

Method used

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  • Method for forming surface microstructure of fuel cell metal cathode plate
  • Method for forming surface microstructure of fuel cell metal cathode plate
  • Method for forming surface microstructure of fuel cell metal cathode plate

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and embodiment the present invention is described in detail, and embodiment is as follows:

[0021] refer to figure 2 As shown, the present invention is molded on the surface of the metal cathode plate of the fuel cell such as figure 1 The three-dimensional flow field pore microstructure method shown includes the following steps:

[0022] Step 1, according to the pore shape and size of the three-dimensional flow field on the surface of the target metal cathode plate, determine the specification of the prefabricated gear roller for processing.

[0023] Step 2, design the specific structure of the prefabricated gear roller.

[0024] Step 3. According to the principle of micro-rolling forming, 200μm grade prefabricated gear rollers are processed: NSK 200μm high-speed milling cutter is used to select the main direction of roller forming by indexing through the technology of variable direction grooving, and milling directly o...

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Abstract

The invention discloses a method for forming a surface microstructure of a fuel cell metal cathode plate. The method firstly accurately designs the roller of the mechanical and electrical system by using a piezoelectric brake loading material micro-deformation method, and then completes the research and development work of the 200[mu]m-class micro-groove device to obtain a mechanical structure anda servo control system conforming to the electromechanical precision thereof. The invention proposes a method for processing pores of a double-layer cathode plate and proposes a processing method fora roller capable of suppressing pores of 200[mu]m, and finally combines a mechanical micro-rolling method with real-time piezoelectric braking to single-roll form a 200[mu]m-class surface pore microstructure, which has high production efficiency, accurate dimensional control and easy preparation of metal surface texture in large quantities.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a method for forming the pore microstructure on the surface of a metal cathode plate of a fuel cell. Background technique [0002] At present, the metal cathode plates of fuel cells all use a single-layer structure. The pressure difference between the inlet and outlet of the flow field of the cathode plate is too low, and most of the gas flows out from the outlet, resulting in low efficiency of the reaction gas infiltrating into the reaction membrane, which reduces the power density. It is not ideal to process protrusions in the middle. [0003] Toyota Corporation of Japan has proposed a figure 1 In the double-layer 3D "tile-like" flow field structure shown, the fluid flows through the interlayer cavity, where the direction of the arrow is the flow direction of the reaction gas, and a part of it flows to the pores, that is, enters the reaction membrane. After the...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 张奥潘建欣吴桐杨军何书默
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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