New fuel cell end plate structure

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...

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

Images