Ultrasonic spot welding system and spot welding process of fuel cell membrane electrode assembly

A membrane electrode assembly, fuel cell technology, applied in the field of welding, can solve the problems of catalyst immersion, waste, slow gas delivery and high resistance

Active Publication Date: 2019-12-17
盐城宇昌科技有限公司
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Problems solved by technology

[0004] However, although the hot pressing method is currently the most common method for fabricating membrane exchange components for fuel cells, the hot pressing method may cause structural deformation in the porous catalyst layer and gas diffusion layer, and cause slow gas transport and high electrical resistance, Moreover, the hot pressing method can also lead to a large amount of catalyst immersion into the catalyst-coated gas diffusion layer, resulting in waste

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  • Ultrasonic spot welding system and spot welding process of fuel cell membrane electrode assembly
  • Ultrasonic spot welding system and spot welding process of fuel cell membrane electrode assembly
  • Ultrasonic spot welding system and spot welding process of fuel cell membrane electrode assembly

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[0023] The present invention will be further described below in conjunction with specific examples.

[0024] The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention. The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] The proton exchange membrane fuel cell (PEMFC) is one of the most potential green new energy developed in recent years. The core component of the proton exchange membrane fuel cell is the membrane electrode assembly (MEA). image 3 As shown, the MEA consists of a proton exchange membrane (PEM), a catalyst layer (CL) and a gas diffusion layer ...

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Abstract

The invention discloses an ultrasonic spot welding system for a membrane electrode assembly of a fuel cell and solves the problem of assembly of the membrane electrode assembly of the fuel cell. The ultrasonic spot welding system for the membrane electrode assembly of the fuel cell comprises a driving mechanism, an ultrasonic spot welding mechanism, a clamp mechanism, a carrying seat mechanism, apressure testing mechanism and a data acquisition mechanism, and can carry out ultrasonic spot welding to a gas diffusion layer and a proton exchange membrane of the fuel cell to achieve a novel modeof mechanically interlocking the gas diffusion layer and the proton exchange membrane. The ultrasonic spot welding system for the membrane electrode assembly of the fuel cell is a feasible technologyreplacing hot pressing and has the advantages of lowering the cost of energy sources and shortening the treatment time.

Description

technical field [0001] The invention relates to the field of welding, and more specifically relates to an ultrasonic spot welding system for a membrane electrode assembly of a fuel cell. Background technique [0002] Proton exchange membrane fuel cells (PEMFC) use polymer membranes as solid electrolytes, so they have the characteristics of high energy conversion rate, low-temperature start-up, and no electrolyte leakage. The preferred power source for permanent power stations. [0003] At present, the assembly of membrane electrode assemblies (MEAs) mostly adopts a "sandwich" structure. The more conventional method is to impregnate the binder on the base carbon paper, then spray or brush the gas diffusion layer, then spray the catalyst ink on the gas diffusion layer with a spray gun, and finally assemble the MEA by hot pressing the cathode and anode on both sides of the PEM. . [0004] However, although the hot pressing method is currently the most common method for fabri...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/08B29C65/78H01M8/10
CPCY02E60/50
Inventor 单德芳
Owner 盐城宇昌科技有限公司
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