Fuel cell internal temperature-humidity-heat flux-current density synchronous measurement sensor

Abstract

The invention discloses a fuel cell internal temperature-humidity-heat flux-current density synchronous measurement sensor and belongs to the field of fuel cell internal parameter measurement. Temperature-humidity-heat flux-current density synchronous measurement sensor bodies are mainly made by a vacuum evaporation coating method, each temperature-humidity-heat flux-current density synchronous measurement sensor body comprises tenth layers of films, the first layer is a silicon dioxide insulation layer, the second layer is a bottom electrode aluminium coating, the third layer is coated with a high molecular polymer humidity-sensing medium, the fourth layer is coated with a top electrode aluminium coating by evaporation, the fifth and sixth layers are covered with a copper coating and a nickel coating by evaporation, the seventh layer is a silicon dioxide protection layer, the eighth layer is a thick silicon dioxide heat resistance layer, and the ninth and tenth layers are a current density measurement copper coating and a current density measurement gold coating respectively. Synchronous measurement of internal temperature, humidity, heat flux and current density of a fuel cell is realized, the sensor can be arranged on a fuel cell flow field plate with flow channel of various shapes, and multi-parameter measurement of single or multiple positions inside the fuel cell is realized.

Description

technical field [0001] The invention belongs to the field of fuel cell internal parameter measurement, and relates to the measurement of fuel cell internal temperature, humidity, heat flux density and current density, in particular to a fuel cell internal temperature-humidity-heat flux density-current density joint measurement sensor. Background technique [0002] Due to the small internal space and compact structure of the fuel cell, the measurement of its internal parameters has always been a relatively difficult problem. Most researchers realize the measurement of a certain parameter by making special modifications to the fuel cell. For the measurement of multiple parameters, it is necessary to disassemble and assemble the fuel cell many times or make a variety of special test fuel cells, which brings a lot of trouble to the measurement work. [0003] Such as temperature measurement, most of them measure the temperature by implanting thermocouples and thermal resistors in...

AI Technical Summary

Problems solved by technology

The current density measurement methods mainly include sub-cell method, membrane electrode method, magnetic ring group method, etc. The transformation of fuel cells is relatively complicated and inconvenient to use

If the traditional method is used to measure the temperature, humidity, heat flux density and current density inside the fuel cell, it will be necessary to carry out very complicated modifications to the fuel cell, or to disassemble the fuel cell multiple times and implant different sensors for measurement, which will make The workload becomes very large, which is not conducive to the stability of fuel cell performance

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