A sealing structure for a fuel cell membrane electrode
A fuel cell membrane and sealing structure technology, which is applied to fuel cells, circuits, electrical components, etc., can solve problems such as short circuit and bipolar plate contact, and achieve the effects of simple structure setting, short circuit prevention, and convenient disassembly and assembly.
Inactive Publication Date: 2018-12-18
周劲
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- Application Information
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Problems solved by technology
Considering that the membrane electrode is very thin, the interval between the bipolar plates after the stack is assembled is very small, and the bipolar plates between different layers are easily contacted to cause a short circuit
Method used
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Embodiment Construction
[0036] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0037] Such as figure 1 As shown, a fuel cell membrane electrode sealing structure provided by the present invention includes a membrane electrode 1, an elastic sealing ring 3, and a sealing frame 2, the elastic sealing ring 3 is arranged on the periphery of the membrane electrode 1, and the sealing frame 2 is arranged on the elastic sealing ring 3 In the periphery, the membrane electrode 1, the elastic sealing ring 3 and the sealing frame 2 are in the same plane after assembly. A positioning hole 4 is opened on the sealing frame 2 . The outer edges around the sealing frame 2 are tilted outward to form the frame skirt 5 .
[0038] Since the elastic sealing ring 3 is easily deformed under compressive stress when the stack is equipped, the positioning hole 4 cannot be punched on the elastic sealing ring 3, otherwise the positioni...
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Abstract
The invention provides a sealing structure for a fuel cell membrane electrode. The sealing structure comprises a membrane electrode, an elastic sealing ring and a sealing frame; the sealing structureis characterized in that the elastic sealing ring is arranged on the periphery of the membrane electrode; the sealing frame is arranged on the periphery of the elastic sealing ring; the membrane electrode, the elastic sealing ring and the sealing frame are located in the same plane; the outer edge of the periphery of the sealing frame is warped towards the outer side to form a frame skirt; and a positioning hole is also formed in the sealing frame. After a stack is assembled, the frame skirt protects the side surface of a bipolar plate to play an insulating protection role; a short circuit between single cells of a fuel cell stack can be prevented; and meanwhile, the short circuit caused by contact of other metal parts in the stack and the bipolar plate can also be prevented.
Description
technical field [0001] The invention relates to the field of fuel cell manufacturing, in particular to the sealing technology of the fuel cell. Background technique [0002] A proton exchange membrane fuel cell usually refers to a stack composed of membrane electrodes, diffusion layers and bipolar plates alternately stacked and connected in series. The internal core component of the device is the membrane electrode (Membrane Electrode Assembly, referred to as MEA). MEA is composed of a proton exchange membrane and a platinum (or platinum-containing alloy) catalyst supported on carbon powder. The pressure and the proton exchange membrane are bonded as a whole. The diffusion layer is usually composed of carbon paper or carbon cloth, which is attached to both sides of the membrane electrode. The outside of the diffusion layer is a bipolar plate. Bipolar plates have the functions of current collector, flow field plate and gas separator, and are usually composed of conductive...
Claims
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IPC IPC(8): H01M8/0273H01M8/0276
CPCH01M8/0273H01M8/0276Y02E60/50
Inventor 周劲
Owner 周劲