Nondestructive measurement device for contact resistance of fuel cell bipolar plate and carbon paper interface

Abstract

The invention discloses a fuel cell bipolar plate and carbon paper interface contact resistance nondestructive measurement device which comprises a base, a micro resistance meter and a controller, the micro resistance meter and the controller are fixed on the base, and a left clamping device and a right clamping device are respectively arranged above the base. The left clamping device and the right clamping device are both provided with auxiliary fixing mechanisms used for sucking and bulldozing carbon paper, and the left clamping device and the right clamping device clamp the carbon paper, the bipolar plate and the carbon paper and then are connected with the micro-resistance meter in series for contact resistance testing. A surface changing mechanism capable of fixing the bipolar plate and driving the bipolar plate to turn over and change the surface is also arranged between the left clamping device and the right clamping device, the bipolar plate is driven to rotate by 180 degrees through the surface changing mechanism after the first contact resistance test is finished, the contact resistance test is performed again, and the average value of the two test results is taken as the final test result. According to the invention, the test carbon paper can be better protected, and meanwhile, the measurement accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of fuel cell detection, in particular to a non-destructive measurement device for the interface contact resistance between a fuel cell bipolar plate and carbon paper. Background technique [0002] The surface contact resistance of the fuel cell bipolar plate and carbon paper interface is an important parameter to measure the electromagnetic properties of the material. The patent number is CN105572474B, and the patent is named "A Bipolar Plate Whole Plate Contact Resistance Test Device for Proton Exchange Membrane Fuel Cell" The application document mentions a device for measuring the contact resistance between the bipolar plate of the fuel cell and the carbon paper, which fixes the upper body and the lower body with the carbon paper on the upper and lower platens of the press respectively, and the The test parts are placed on the carbon paper on the lower body, and the upper platen of the press moves down to...

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Problems solved by technology

[0004] 1. Carbon paper is expensive, and the material is brittle and fragile. When the device installs the carbon paper on the upper body, it is only fixed under the upper gold-plated copper plate through a small stopper. This clamping and fixing method is easy to make the carbon paper chipping at the edges;

[0005] 2. There are some subtle differences on the surface of each carbon paper, such as surface flatness, which will cause slight changes in the surface contact resistance of the interface between the bipolar plate and the carbon paper, affecting the accuracy of the measurement. device does not solve the problem

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