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

Abstract

The invention discloses a fuel cell internal temperature-heat flux-current density synchronous measurement sensor and belongs to the field of fuel cell internal parameter measurement. Each temperature-heat flux-current density synchronous measurement sensor body is disposed on a ridge of a fuel cell flow field plate, comprises ten layers of films and is mainly made by a vacuum evaporation coating method, the first layer is a silicon dioxide insulation layer, the second layer is a top electrode aluminium coating, the third layer is coated with a high molecular polymer humidity-sensing medium, the fourth layer is a bottom electrode aluminium coating, the fifth and sixth layers are a film heat flux meter copper coating and a film heat flux meter nickel coating respectively, 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, heat flux and current density of a fuel cell can be realized, special modification on the structure of the fuel cell flow field plate and the like is not required, and the sensor can be arranged on the fuel cell flow field plate with flow channels of various shapes.

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 humidity, heat flux density and current density, in particular to a fuel cell internal humidity-heat flux density-current density joint measurement sensor. Background technique [0002] The performance of fuel cells is the focus of researchers, and it is most directly related to the electrochemical reactions on the fuel cell membrane electrodes. The electrochemical reaction rate on the membrane electrode of the fuel cell is affected by many factors, such as temperature, concentration of reaction gas, flow rate, humidity, etc. Therefore, monitoring the internal parameters of the fuel cell can help optimize the operation of the fuel cell. conditions and structural parameters to keep the fuel cell running at high performance. [0003] For humidity measurement, the humidity inside the fuel cell can be measured by opening hol...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a sensor that can simultaneously measure the internal humidity, heat flux density and current density of the fuel cell to solve the problem of joint measurement of the internal humidity, heat flux density and current density of the fuel cell

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