Fuel cell current density distribution nondestructive testing device and method

Abstract

The invention discloses a fuel cell current density distribution nondestructive testing device and method, the fuel cell current density distribution nondestructive testing device comprises three magnetic field acquisition units, the output ends of the three magnetic field acquisition units are connected with one end of a data transmission module, and the other end of the data transmission module is connected with a computer; the three magnetic field acquisition units and the MEA of the fuel cell are arranged on the same plane, and two of the three magnetic field acquisition units are respectively arranged on two sides of the fuel cell; the rest magnetic field acquisition unit is arranged at the end part of the fuel cell and is far away from the gas inlet end of the fuel cell; according to the invention, the magnetic field acquisition units are arranged on the two sides and the end portion of the fuel cell respectively, the magnetic field intensity of the position where the magnetic field acquisition units are located is obtained through the magnetic field acquisition units, and then the current density distribution result of the fuel cell is calculated through the computer according to the obtained magnetic field intensity; the detection device is simple in structure, does not need an external power supply, and does not need to modify a fuel cell; and a current density distribution result calculated by using an electromagnetic inversion algorithm is high in precision.

Description

Technical field [0001] The present invention belongs to the technical field of fuel cells, and more particularly to a fuel cell current density distribution lossless detection device and method. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is one of the most striking energy conversion devices, mainly for fixing and mobile applications, such as fixed power generation, small portable applications and automotive power supply, etc. The electrochemical reaction is uniformly distributed, which can affect the distribution of current density distribution of various regions of the fuel cell. [0003] At present, the method of measuring the current density distribution of the proton exchange membrane fuel cell includes a sub-battery method, a divided flow channel method, and an infrared sensor disposed outside the battery to indirectly measuring the current distribution; wherein the sub-battery method, The production process is complex, the processing is difficu...

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Problems solved by technology

[0005] Aiming at the technical problems existing in the prior art, the present invention provides a fuel cell current density distribution non-destructive detection device and method to solve the difficulty in operation and use of the existing fuel cell current density distribution measurement process and the need to modify the fuel cell , the technical problem of poor adaptability of the measuring device

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