Water jacket tightness detection device and method for bipolar plate of fuel cell

Abstract

The invention provides a water jacket tightness detection device and method for a bipolar plate of a fuel cell. The device comprises a gas source, a reducing valve, a pressure gauge, a testing end plate, a press and a separating clip, wherein an air inlet and an air outlet which are communicated with the inlet and outlet of the water jacket of the tested bipolar plate and an upper testing end plate positioning hole corresponding to the positioning hole of the tested bipolar plate are formed on the upper testing end plate, and the air outlet end is connected with a stop valve; the air inlet is connected with the reducing valve and the gas source, and the pressure gauge is connected between the air inlet and the reducing valve; a separating clip inlet, a separating clip outlet and a separating clip positioning hole are formed on the separating clip, and a positioning pin passes through the positioning hole; and the testing end plate clamps the tested bipolar plate, and is arranged between an upper die and a lower die of the press. The testing method comprises: introducing testing gas to a tested component and preserving pressure; and determining the air tightness of the tested component according to pressure changes in the tested component during the pressure preserving period. The method and the device have the advantages of wide measurement range, low device cost and strong interference resistance, and are simple and stable in operation.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a proton exchange membrane fuel cell bipolar plate water cavity detection technology. Background technique [0002] The bipolar plate is a key component of the proton exchange membrane fuel cell (PEMFC) battery pack. In the fuel cell, it mainly plays the role of collecting current, conducting electricity, separating oxidant and reducing agent, and guiding the flow of oxidant and reducing agent on the electrode surface of the battery. Therefore, its quality directly determines the output power and service life of the battery stack. However, the research on bipolar plates at home and abroad mainly focuses on the design of materials and flow fields, especially on the matrix materials. The purpose is to reduce the cost of PEMFC, reduce the volume of the battery, and further improve the efficiency of the battery. However, little research has been done on methods or devices for per...

AI Technical Summary

Problems solved by technology

However, the current status is that in the field of fuel cells, most of the air-tightness detection technologies involve fuel cell stacks and bipolar plate materials, but there are few reports on the air-tightness detection technology of the bipolar plate water cavity.

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