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A method for forming the surface microstructure of a fuel cell metal cathode plate

A metal cathode and fuel cell technology, which is applied to battery electrodes, structural parts, circuits, etc., can solve the problems of high pore processing requirements on the surface of metal cathode plates, unable to meet the requirements of forming accuracy, and achieve low cost, small volume, and size control. precise effect

Active Publication Date: 2021-08-24
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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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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  • A method for forming the surface microstructure of a fuel cell metal cathode plate
  • A method for forming the surface microstructure of a fuel cell metal cathode plate
  • A method for forming the surface microstructure of a 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 molding method for the surface microstructure of the metal cathode plate of a fuel cell. First, the precision design of the rollers of the mechanical and electrical system is carried out by using the micro-deformation method of the piezoelectric brake loading material, and then the research and development of the 200μm-level micro-groove equipment is completed. , to obtain a mechanical structure and a servo control system that meet its electromechanical precision; the present invention proposes a method for processing the pores of the double-layer cathode plate, and proposes a processing method for rolling heads that can suppress 200 μm-level pores, and finally the mechanical micro-rolling processing method Combined with real-time piezoelectric braking, the 200μm-level surface pore microstructure can be formed by one-time rolling, with high production efficiency, precise size control, and easy preparation of metal surface textures 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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Patent Type & Authority Patents(China)
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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