Plug-in piece for measuring internal humidity and heat flux density distribution of fuel battery

Abstract

The invention discloses a plug-in piece for measuring internal humidity and heat flux density distribution of a fuel battery. The plug-in piece is a device for measuring the internal humidity distribution and heat flux density distribution of the fuel battery, wherein a leak and a rib corresponding to a flow field plate passage and a ridge of the fuel battery are arranged on a conductive substrate, and a humidity and heat flux density joint measurement sensor is arranged on the rib; and the humidity and heat flux density joint measurement sensor is manufactured by adopting a vacuum evaporation coating method and comprises eight layers of films. A lead is also manufactured by adopting the vacuum evaporation coating method, is used for transmitting electric signals, and is expanded to form a pin when extending to the edge of a flow field plate so as to facilitate connection between the lead and external data acquisition equipment. By adopting the plug-in piece disclosed by the invention, the internal humidity distribution and heat flux density distribution of the fuel battery can be measured online synchronously; and the plug-in piece can be used as an independent component to be arranged in the fuel battery, is simple in structure and wide in application range, and can be matched to fuel battery flow field plates in the shape of a parallel flow passage, a snakelike flow passage, an alternative form flow passage or other flow passages.

Description

technical field [0001] The invention relates to an insert for measuring the humidity-heat flux distribution inside a fuel cell, belonging to the technical field of fuel cell detection. Background technique [0002] The uneven electrochemical reaction rate on the surface of the membrane electrode inside the fuel cell will lead to the uneven internal temperature field. If the structural design of the fuel cell is unreasonable, the heat generated during the operation of the fuel cell will not be discharged in time, which will cause The abnormal rise of the internal temperature of the fuel cell may even cause the membrane electrode to fail. [0003] Humidity is also an important factor affecting the performance of the fuel cell. It not only affects the proton conduction of the proton exchange membrane of the fuel cell, but also affects the amount of water in the reaction product inside the fuel cell, and at the same time affects the heat and mass transfer of the fuel cell. If t...

AI Technical Summary

Problems solved by technology

However, most researchers have only conducted measurement research on a single parameter of heat flux or humidity inside the fuel cell. The measurement of heat flux mostly adopts the method of implanting sensors inside the fuel cell, but the sensor is bulky and requires special modification of the fuel cell. , thereby increasing the complexity of the measurement work; for humidity measurement, the main method is to implant a commercial humidity sensor by transforming the fuel cell or use an etching process to make a humidity sensor for measurement, which increases the complexity of the measurement work and increases the cost. There is a certain damage to the structure of the fuel cell, affecting the stability of its performance

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