Bipolar plate for hydrogen fuel cell

Abstract

The invention discloses a bipolar plate for a hydrogen fuel cell and relates to the technical field of hydrogen fuel cell design and manufacturing. The bipolar plate for the hydrogen fuel cell comprises an anode plate and a cathode plate, a gap between porous graphite plates of the anode plate and the cathode plate is filled with a fluorine joint filling material; the back surface of the anode plate and the back surface of the cathode plate are coupled to form a cooling flow field; when the back surfaces of the anode plate and the cathode plate are coupled, a first anode branch port and a second anode branch port form a first connecting line, a first cathode branch port and a second cathode branch port form a second connecting line, and the first connecting line and the second connecting line are arranged in a crossed manner; the groove of an anode flow field and the groove of a cooling flow field are arranged in an offset manner; and the groove of the cathode flow field and the groove of the cooling flow field are arranged in an offset manner. According to the bipolar plate for the hydrogen fuel cell, the gap of the porous graphite plates are filled with the fluorine gap filling material, so that the moisture absorption of the graphite plates is reduced, the expansion rate is reduced, the graphite plates are prevented from being broken due to overlarge expansion pressure in a limited space, the initial working efficiency is improved to a great extent, and a proton membrane is prevented from being damaged.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of hydrogen fuel cells, in particular to a bipolar plate for hydrogen fuel cells. Background technique [0002] A hydrogen fuel cell is an environmentally friendly battery with controllable output power that uses hydrogen and oxygen to react chemically with a catalyst to generate electricity and water. The basic principle is the reverse reaction of electrolyzed water. Hydrogen and oxygen are supplied to the anode and cathode respectively. After the hydrogen diffuses outward through the anode and reacts with the catalyst, negative electrons are released to reach the cathode through the external load. As a new type of power source, hydrogen fuel cells have the characteristics of high efficiency, no pollution, no noise, and continuous operation that ordinary fuel cells have, and have the advantages of high power density, low operating temperature, fast start-up, and long service life. ...

AI Technical Summary

Problems solved by technology

However, during the working process, the graphite plate is easy to absorb the moisture contained in the gas, resulting in a high expansion rate, which greatly affects the initial working efficiency of the bipolar plate and increases the probability of destroying the proton membrane.

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