Device and method for non-destructive detection of fuel cell current density distribution

A fuel cell and current density technology, applied in current density measurement, measurement device, measurement of electricity and other directions, can solve the problems of difficult use, poor adaptability of the measurement device, etc., to achieve convenient production and use, simple structure and improved accuracy. Effect

CN113740746BActive Publication Date: 2022-05-20XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-05-20

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Abstract

The invention discloses a fuel cell current density distribution non-destructive detection device and method, comprising three magnetic field acquisition units, the output ends of the three magnetic field acquisition units are all connected to one end of a data transmission module, and the other end of the data transmission module is connected to a computer The three magnetic field acquisition units are arranged on the same plane as the MEA of the fuel cell, and two of the magnetic field acquisition units are respectively arranged on both sides of the fuel cell; The gas end is set; the present invention sets magnetic field acquisition units on both sides and ends of the fuel cell respectively, uses the magnetic field acquisition unit to obtain the magnetic field strength at the location, and then uses the computer to calculate the current density distribution result of the fuel cell according to the obtained magnetic field strength The structure of the detection device is simple, no external power supply is required, and the fuel cell does not need to be modified; the accuracy of the current density distribution calculated by using the electromagnetic inversion algorithm is high.
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Description

technical field

[0001] The invention belongs to the technical field of fuel cells, and in particular relates to a device and method for non-destructive detection of fuel cell current density distribution. Background technique

[0002] Proton exchange membrane fuel cell (PEMFC) is one of the most attractive energy conversion devices, mainly used in stationary and mobile applications, such as: stationary power generation, small portable applications, and power supply for automobiles; due to the interface on both sides of the proton exchange membrane The uniform distribution degree of the electrochemical reaction can affect the current density distribution in each area of ​​the fuel cell, and there is often an uneven phenomenon.

[0003] At present, the methods for measuring the current density distribution of a proton exchange membrane fuel cell include the sub-cell method, the split flow channel method, and the indirect measurement of the current distribution by using an infr...

Examples

Embodiment Construction

[0045] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the following specific examples will further describe the present invention in detail. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] as attached Figure 1-5 As shown, the present invention provides a fuel cell current density distribution non-destructive detection device, including a magnetic field acquisition unit 1, a data transmission module 2 and a computer 3; the output ends of the three magnetic field acquisition units 1 are respectively connected to one end of the data transmission module 2 , the other end of the data transmission module 2 is connected to the computer 3; three magnetic field acquisition units 1 are arranged on the same plane as the membrane electrode assembly MEA44 of the fuel cell 4, wherein two magnetic fiel...