Fuel cell internal humidity-heat flux density-current density distribution measurement insert

Abstract

A fuel cell internal humidity-heat flux density-current density distribution measurement insert is a fuel cell internal humidity-heat flux density-current density distribution measurement device, a leakage seam and a rib which are corresponding to a fuel cell flow field plate flow passage and ridge are arranged on a conductive substrate, and a humidity-heat flux density-current density combined measurement sensor is arranged on the rib; the humidity-heat flux density-current density combined measurement sensor is prepared by vacuum evaporation coating method, and comprises ten layers of thin films. A leading wire is also prepared by the vacuum evaporation coating method, is used to transmit electrical signals, and extends to the flow field plate edge to form a lead foot by magnifying to facilitate connecting with external connection data acquisition equipment. The fuel cell internal humidity-heat flux density-current density distribution measurement insert realizes the synchronous online measurement of fuel cell internal humidity distribution, heat flux density distribution and current density distribution without special transformation of a fuel cell structure, and is suitable for a fuel cell flow field plate with a parallel flow passage, a serpentine flow passage, an interleaved flow passage or a flow passage with other shape.

Description

technical field [0001] The invention relates to an insertion piece for measuring the distribution of humidity-heat flux density-current density inside a fuel cell, and belongs to the technical field of fuel cell detection. Background technique [0002] The electrochemical reaction rate on the membrane electrode of the fuel cell determines the performance of the fuel cell. However, the electrochemical reaction rate on the surface of the membrane electrode is not exactly the same, which leads to the difference in the temperature field and current density distribution inside the fuel cell. At the same time , the difference in temperature and humidity in the area inside the fuel cell will aggravate the difference in the electrochemical reaction rate. [0003] By monitoring the distribution of humidity, heat flux and current density inside the fuel cell, it is helpful to find the best fuel cell operating parameters and structural design solutions to improve the performance of the...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a device capable of joint measurement of the internal humidity distribution, heat flux density distribution and current density distribution of the fuel cell to solve the problem of synchronous online measurement of the fuel cell internal humidity distribution, heat flux density distribution and current density distribution

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