A narrow channel ultra-thin metal composite bipolar plate

Abstract

The application relates to an ultra-thin metal composite bipolar plate with a narrow flow channel, and relates to the field of bipolar plates. The bipolar plate includes an anode plate for communicating with hydrogen, and a cathode arranged at intervals on one side of the anode plate for communicating with oxygen plate, two membrane electrodes placed between the anode and cathode plates, a proton exchange membrane abutting between the two membrane electrodes, a plurality of connections between the anode and cathode plates for connecting the two The side of the cathode plate and the anode plate close to each other is provided with a plurality of flow channels; the connection mechanism includes a plug-in rod arranged between the cathode plate and the anode plate, and a plug-in rod disposed between the plug-in rod and the cathode plate. A snap-fit ​​assembly for fixing the plug-in rod on the cathode plate, and a pressing assembly arranged between the plug-in rod and the anode plate for pressing and fixing the cathode plate and the anode plate; the cathode plate and the anode plate are evenly An installation hole is opened, and the insertion rod is located in the installation hole. The present application has the effect of facilitating the fixation and removal of the bipolar plate.

Description

technical field [0001] The present application relates to the field of bipolar plates, in particular to a narrow channel ultra-thin metal composite bipolar plate. Background technique [0002] At present, the bipolar plate, also known as the collector plate, is one of the important components of the fuel cell. It has the characteristics of separating the fuel and the oxidant and has high electrical conductivity. The bipolar plate materials can be roughly divided into three types: carbon materials, metal materials and metal materials. Composite material with carbon. [0003] At present, the bipolar plate includes an anode plate, a cathode plate, and a flow channel opened on the two plates. The anode plate is used to communicate oxygen in the air, the cathode is used to communicate hydrogen, and the bipolar plate is used to prevent the gas chamber in the battery. Hydrogen and oxygen are connected in series, and a current path is established between the cathode and anode in se...

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Problems solved by technology

[0003] At present, the bipolar plate includes an anode plate, a cathode plate, and flow channels opened on the two plates. The anode plate is used to communicate with oxygen in the air, the cathode is used to communicate with hydrogen, and the bipolar plate is used to prevent the gas in the battery gas chamber. Hydrogen and oxygen are connected together, and a current path is established between the negative and positive electrodes in series. Hydrogen and oxygen are evenly distributed to the reaction layer of the electrode for electrode reaction. The product is water, which is environmentally friendly and pollution-free. It maintains a certain mechanical strength and good gas barrier. Under the premise of the effect, the thickness of the bipolar plate should be as thin as possible to reduce the conduction resistance to current and heat. However, the cathode plate and the anode plate are usually connected by welding, which requires high welder skills. When the plate is overhauled and maintained, it is difficult to separate the cathode plate from the anode plate, which causes certain troubles to the overhaul

[0004] In view of the related technologies mentioned above, the inventor believes that there is a defect that the cathode plate and the anode plate in the bipolar plate are inconvenient to disassemble.

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