Clamp for detecting compactness of bipolar plate of fuel cell

Abstract

The invention relates to a clamp for detecting the compactness of a bipolar plate of a fuel cell. The clamp comprises a to-be-tested polar plate, and an upper clamp assembly and a lower clamp assemblyfor detecting the to-be-tested polar plate. The upper clamp assembly and the lower clamp assembly are respectively provided with a test gas cabin used for detecting the to-be-tested polar plate. Thetwo test gas cabins form a closed cavity when the upper clamp assembly and the lower clamp assembly are closed; and test gas joints are arranged on the same sides of the upper clamp assembly and the lower clamp assembly. According to the clamp, the to-be-tested polar plate is arranged in the closed cavity formed by the upper clamp assembly and the lower clamp assembly, air is introduced into the gas inlet joints, an air inlet pipe adjusts the pressure of the test gas through a pressure reducing valve, and meanwhile, an air outlet pipe is closed, the test gas enters the test gas cabins, then, the air inlet pipe is closed after the pressure is stable, and whether a pressure gauge changes or not is observed after pressure maintaining for a period of time, so that the detection of the compactness of the bipolar plate is realized.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a fixture for detecting the compactness performance of a bipolar plate of a fuel cell. Background technique [0002] A fuel cell is a device that converts hydrogen fuel and oxidant into electrical energy and reaction products. The internal core component of the device is composed of bipolar plates sandwiched with membrane electrodes. During the operation of the fuel cell stack, the bipolar plates perform the following functions to maintain the best working condition and service life of the fuel cell stack: (1) battery conductor , the cathode and anode are respectively formed on both sides of the plate, and the battery cells are connected in series to form a fuel cell stack; (2) provide reactant gas (mass transfer) to the electrode through the flow channel; (3) coordinate the management of water and heat to prevent cooling Leakage of medium and reaction gas; (4) Provide structur...

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Problems solved by technology

[0004] In order to increase the energy density of the fuel cell stack and reduce the resistance to current and heat conduction, the thickness of the bipolar plate should be as thin as possible under the premise of maintaining a certain mechanical strength and good gas barrier effect, but it is easy to cause the bipolar plate Dense cross, making it permeable to hydrogen, oxygen and water

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