Fuel cell stack, bipolar plate, and gas diffusion layer
A fuel cell stack and gas diffusion layer technology, applied in fuel cells, electrical components, circuits, etc., to achieve the effects of increased power output, increased quantity, and good heat dissipation
Active Publication Date: 2020-05-05
TSINGHUA UNIV
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- Application Information
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Problems solved by technology
[0004] Based on this, it is necessary to provide a fuel cell stack, bipolar plate and gas diffusion layer for the problem of how to improve the performance of the fuel cell
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[0049] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.
[0050] The serial numbers numbered for components in this document, such as "first", "second", etc., are only used to classify the described objects and do not have any sequence or technical meaning. The "connection" and "connection" mention...
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Abstract
The invention relates to a fuel cell stack, a bipolar plate and a gas diffusion layer. The fuel cell stack comprises a plurality of first graphite bipolar plates, a plurality of second graphite bipolar plates and a plurality of reaction units which are arranged in sequence. Each first graphite bipolar plate comprises an air flow channel, a hydrogen flow channel and a cooling flow channel. At leastone second graphite bipolar plate is arranged between two adjacent first graphite bipolar plates. Each second graphite bipolar plate comprises an air flow channel and a hydrogen flow channel. A reaction unit is arranged between any two adjacent bipolar plates. Two adjacent first graphite bipolar plates are used for cooling the second graphite bipolar plate in the middle. The thickness of the bipolar plate without the cooling flow channel is reduced by 40% compared with that of the bipolar plate with the cooling flow channel. Each first graphite bipolar plate is not provided with a cooling flow channel. Each first graphite bipolar plate is further thinned. In unit volume, the number of single fuel cells is increased, and the electric energy yield is increased. The power density of the fuelcell stack is increased, so that the performance of the fuel cells is improved.
Description
technical field [0001] This application relates to the field of new energy technologies, in particular to a fuel cell stack, a bipolar plate and a gas diffusion layer. Background technique [0002] A fuel cell is an energy conversion device that directly converts chemical energy into electrical energy. It has the characteristics of high efficiency, low noise, and environmental friendliness, and has great development potential and application prospects. The three main components that make up a fuel cell are membrane electrodes, bipolar plates, and gas diffusion layers. [0003] Membrane electrodes consist of a proton exchange membrane and catalyst layers on both sides. The catalyst layer is the place where the electrochemical reaction takes place. The hydrogen gas undergoes an oxidation reaction at the anode catalyst layer. Oxygen undergoes a reduction reaction at the cathode catalyst layer and simultaneously produces water. Bipolar plates are generally made of metal or g...
Claims
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IPC IPC(8): H01M8/0258H01M8/0267H01M8/241H01M8/2457
CPCH01M8/0258H01M8/0267H01M8/241H01M8/2457H01M8/0213H01M8/04089H01M8/1004H01M8/2465Y02E60/50
Inventor 徐领李建秋徐梁飞胡尊严刘慧泽王志娜欧阳明高
Owner TSINGHUA UNIV