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Multipoint analysis method for fuel cell

A fuel cell and analysis method technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as inability to detect performance conditions

Active Publication Date: 2019-04-23
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a multi-point fuel cell analysis method for the problem that the internal state of the fuel cell is concealed due to the stacking of battery cells, and the performance of each cell cannot be detected.

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  • Multipoint analysis method for fuel cell
  • Multipoint analysis method for fuel cell

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Embodiment Construction

[0071] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0072] The common proton exchange membrane fuel cell structure uses a solid polymer membrane capable of transferring protons as the electrolyte, and the catalyst layers of the cathode and anode sandwich the electrolyte. The catalyst layer and the membrane are collectively called the membrane electrode (Membrane Electrode Assembly, MEA). Oxygen at the cathode and hydrogen at the anode diffuse through the porous gas diffusion layer (GasDiffusion Layer, GDL) to the membrane electrode to undergo oxidation reactions (H 2 —2H + +e - ) and reduction reaction (O 2 +4H + +4e - —2H 2 O). Pro...

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Abstract

The invention relates to a multipoint analysis method for a fuel cell. The multipoint analysis method for the fuel cell comprises the following steps: acquiring base current density of a first singlecell connected with a fuel cell cathode by a gas sampling method; then acquiring potential of a second single cell to obtain transverse current density of a bipolar plate where an anode of a second single cell is positioned; and finally, calculating current density of the second single cell in each second area according to the base current density and the transverse current density. According to the multipoint analysis method for the fuel cell, the current density distribution condition of each single cell can be obtained under the condition of not damaging an internal structure of the fuel cell. The performance condition of each single cell is judged according to the current density distribution condition of each single cell. The multipoint analysis method for the fuel cell is favorable for improving the accuracy of design evaluation of a fuel cell stack and further promotes structure optimization of the fuel cell.

Description

technical field [0001] The present application relates to the field of battery technology, in particular to a multi-point analysis method for fuel cells. Background technique [0002] A fuel cell is an environmentally friendly, high-efficiency, long-life power generation device. Taking the proton exchange membrane fuel cell (PEMFC) as an example, the fuel gas enters from the anode side, the hydrogen atoms lose electrons at the anode and become protons, the protons pass through the proton exchange membrane to the cathode, and the electrons also reach the cathode through the external circuit, and at the cathode Protons, electrons and oxygen combine to form water. The fuel cell converts chemical energy into electrical energy in a non-combustion manner, and its direct power generation efficiency can be as high as 50% or more because it is not limited by the Carnot cycle. [0003] A high-power fuel cell stack is composed of multiple large-area fuel cell cells connected in serie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/378G01R31/389G01R31/392G01R31/396G01R31/385
Inventor 李建秋胡尊严徐梁飞欧阳明高方川胡骏明徐鑫
Owner TSINGHUA UNIV
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