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

A current density and fuel cell technology, applied in fuel cells, fuel cell additives, circuits, etc., to achieve the effects of easy production, simple structure, and wide application range

Active Publication Date: 2015-03-11
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 distri

Method used

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

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] refer to figure 1 As shown, the fuel cell internal humidity-heat flux-current density distribution measuring insert of the present invention includes a conductive substrate 1, a leak 2, a rib 3, a humidity-heat flux-current density joint measurement sensor 4, a lead wire 5, a lead Foot 6, positioning hole 7; leakage 2 and rib 3 are arranged on the conductive substrate 1, which is the same as the flow channel and ridge on the flow field plate of the fuel cell under test in shape and size, and the positions correspond to each other. Humidity-heat flux-current density joint measurement sensor 4 is arranged on it; one end of lead wire 5 is connected to humidity-heat flux-current density joint measurement sensor 4, and the other end extends to the edge of conductive substrate 1 for transmitting humidity-heat flux density - the electrical signal generated by the curr...

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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...

Claims

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Application Information

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IPC IPC(8): H01M8/04
CPCH01M8/04067H01M8/04492H01M8/04701H01M8/04746H01M8/04791H01M8/04828Y02E60/50
Inventor 郭航王政叶芳马重芳
Owner BEIJING UNIV OF TECH
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