Fuel cell stacks, bipolar plates and gas diffusion layers
A fuel cell stack, gas diffusion layer technology, applied in fuel cells, electrical components, circuits, etc., to achieve good heat dissipation, increased power density, and increased number of effects
Active Publication Date: 2021-03-30
TSINGHUA UNIV
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- Abstract
- Description
- Claims
- 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 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" mentioned in this...
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Abstract
The application relates to a fuel cell stack, a bipolar plate and a gas diffusion layer. The fuel cell stack includes a plurality of first graphite bipolar plates, a plurality of second graphite bipolar plates and a plurality of reaction units arranged in sequence. The first graphite bipolar plate includes air flow channels, hydrogen flow channels and cooling flow channels. At least one second graphite bipolar plate is arranged between two adjacent first graphite bipolar plates. The second graphite bipolar plate includes air flow channels and hydrogen flow channels. A reaction unit is set between any two adjacent bipolar plates. The two adjacent first graphite bipolar plates cool down the middle second graphite bipolar plate. The thickness of bipolar plates without cooling channels is 40% lower than that of bipolar plates with cooling channels. The first graphite bipolar plate is not provided with cooling channels. The first graphite bipolar plate is further thinned. Within a unit volume, the number of single pieces of fuel cells increases, and the output of electric energy increases. The power density of the fuel cell stack is increased, which in turn improves the performance of the fuel cell.
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