Internal temperature-humidity-heat flow density distribution measuring insertion sheet of fuel cell

Abstract

The invention discloses an internal temperature-humidity-heat flow density distribution measuring insertion sheet of a fuel cell. The internal temperature-humidity-heat flow density distribution measuring insertion sheet of the fuel cell is a measuring device for the internal temperature, the humidity and the heat flow density of the fuel cell. A leaking seam and a rib corresponding to a flow field plate runner and a ridge of the fuel cell are arranged on a conductive base plate, and a temperature-humidity-heat flow density simultaneous detection sensor is distributed on the rib; the temperature-humidity-heat flow density simultaneous detection sensor is manufactured by adopting a vacuum evaporation coating method, and comprises eight layers of films. A lead wire is also manufactured by adopting the vacuum evaporation coating method and used for transmitting an electric signal, and amplifying to form a pin for conveniently connecting with external data acquisition equipment while extending to the edge of the flow field plate. The internal temperature-humidity-heat flow density distribution measuring insertion sheet of the fuel cell can be used for realizing synchronous on-line measurement of the internal temperature distribution, the humidity distribution and the heat flow density distribution of the fuel cell. The device is independent from the fuel cell, and can be adaptive to the fuel cell flow field plates with parallel runners, S-shaped runner, staggered type runners or runners in other shapes without the need of specially modifying the structure of the fuel cell.

Description

technical field [0001] The invention relates to an insert for measuring the temperature-humidity-heat flux density distribution inside a fuel cell, and belongs to the technical field of fuel cell detection. Background technique [0002] Fuel cells are very sensitive to temperature changes. If the structural design of the fuel cell is unreasonable, the internal heat will not be discharged in time, the internal temperature field will be destroyed, and local abnormal high temperature will be caused, which will lead to the failure of the membrane electrode of the fuel cell. Similarly, the humidity inside the fuel cell also has a great impact on its performance. The level of humidity not only affects the proton transfer capability of the proton exchange membrane in the fuel cell, but also affects the amount of water generated inside the fuel cell. If the humidity is not enough, the proton exchange membrane will dry up, and the performance of the fuel cell will be greatly reduced....

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