New fuel cell end plate structure

A single cell and end plate technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as single cell service life and uneven contact resistance distribution that affect the working efficiency of fuel cells, so as to improve overall performance, improve efficiency, The effect of uniform pressure distribution

Active Publication Date: 2021-08-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the micro-deformation of the components under normal clamping, the pressure distribution on the membrane electrode is high around and low in the middle, and the pressure distribution is not uniform. Therefore, the contact resistance distribution on the membrane electrode is uneven under the working state, making it To a certain extent, it affects the working efficiency of fuel cells and the service life of single cells

Method used

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  • New fuel cell end plate structure
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  • New fuel cell end plate structure

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as Figure 6 The axial side structure diagram of the new single fuel cell end plate is shown, and there are 8 evenly distributed bolt holes around the end plate of the fuel cell end plate, which are connected to other structural components of the fuel cell through connecting bolts. There is a circle of deep grooves on the lower surface of the end plate. The distance from the deep groove to the side of the end plate is the same as the distance from the bolt hole to the side of the end plate. The central part of the lower end surface is provided with a boss whose relative position is the same as the active area of ​​the fuel cell membrane electrode. The position is consistent, the size of the boss is the same as the maximum size of the active area, the height of the boss is consistent with the depth of the deep groove, which...

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Abstract

The invention discloses a novel fuel cell end plate structure, which includes a plate body. Several evenly distributed bolt holes are opened around the top surface of the fuel cell end plate, and are connected with other structural components of the fuel cell through connecting bolts. A circle of deep grooves is provided on the lower end surface of the end plate, and the overall structure of the end plate is left-right symmetrical. The invention rationally utilizes the mechanical conduction of pressure on the structural components, and designs the end plate structure with deep grooves on the lower end surface, so that the clamping load of the bolts distributed around the fuel cell clamping transitions to the middle part of the lower end surface of the end plate, The pressure distribution of the membrane electrode becomes uniform, the internal resistance of the entire fuel cell is reduced, the comprehensive performance of the membrane electrode of the proton exchange membrane fuel cell is improved, and the efficiency of the entire fuel cell is improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a novel fuel cell end plate structure. Background technique [0002] The proton exchange membrane fuel cell is a power generation device that generates electrical energy through the electrochemical reaction of oxygen and hydrogen. It directly converts chemical energy into electrical energy isothermally and electrochemically. Because it does not go through a heat engine process, the energy conversion efficiency is high (40% ~60%), almost no nitrogen oxides and sulfur oxides. [0003] The proton exchange membrane fuel cell is composed of multiple parts stacked on each other. The bipolar plate and the membrane electrode three-in-one assembly are stacked, and the seal is embedded between them. After being pressed by the front and rear end plates, they are fastened with screws. That constitutes a proton exchange membrane fuel cell. The fuel cell end plate is a structural componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0273H01M8/1004
CPCH01M8/0273H01M8/1004Y02E60/50
Inventor 詹志刚杨小凡贺鲁炎向蔚杨小祥余圆
Owner WUHAN UNIV OF TECH
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