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Bipolar plate and fuel cell

A bipolar plate, a pair of technology, used in fuel cells, circuits, electrical components, etc., can solve problems such as water accumulation

Inactive Publication Date: 2021-05-11
SHANGHAI ELECTRICGROUP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a bipolar plate, which can be used to solve the problem of water accumulation under the ridge of the gas diffusion layer, thereby achieving the effect of improving the water transmission process under the ridge of the gas diffusion layer

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  • Bipolar plate and fuel cell
  • Bipolar plate and fuel cell
  • Bipolar plate and fuel cell

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Can refer to Figure 4 , the discharge of water inside the fuel cell is through the capillary pressure or hydrophobicity of the micropores in the gas diffusion layer 30, and the generated water is transported from the catalyst coating film 20 to the gas diffusion layer 30, and then passes through the gas pair in the flow channel 11. Purging of the gas diffusion layer 30 expels water to the outside of the cell. However, the part directly based on the ga...

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Abstract

The present application relates to the technical field of fuel cells, and discloses a bipolar plate and a fuel cell, the bipolar plate comprises: a bipolar plate body, one side of the bipolar plate body is provided with a plurality of flow channels arranged along a first direction, a protrusion portion is arranged between every two adjacent flow channels to form a ridge portion, and the extension direction of the ridge portion is perpendicular to the first direction; a first groove is formed in the surface of one side, deviating from the bottom of the runner, of at least one part of the ridge part, at least one end of the first groove communicates with the flow channel adjacent to the ridge part, and the extending direction of the first groove is not perpendicular to the first direction; a second groove is formed in the surface of one side, deviating from the bottom of the flow channel, of at least one part of the multiple ridges provided with the first grooves, the extending direction of the second groove is consistent with the extending direction of the ridges, and the second groove is communicated with at least one first groove. The bipolar plate disclosed by the invention can be used for solving the problem of water accumulation under the gas diffusion layer ridge, so that the effect of improving the water transmission process under the gas diffusion layer ridge is achieved.

Description

technical field [0001] The present application relates to the technical field of fuel cells, in particular to a bipolar plate and a fuel cell. Background technique [0002] The structural composition of the fuel cell generally includes the catalyst coating membrane placed in the innermost layer, and the cathode and anode gas diffusion layers, bipolar plates, etc. located on both sides of it in turn. Among them, both the gas diffusion layer and the bipolar plate have the functions of distributing, transporting gas and water management, that is, regulating the two-phase transport process of water and gas during the operation of the battery. [0003] Generally, a bipolar plate is composed of flow channels and ridges arranged alternately. When the battery is assembled, in order to reduce the contact resistance, the gas diffusion layer and the ridges need to be in close contact. Compared with that, the compression deformation of the gas diffusion layer above the ridge is larger,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0258
CPCH01M8/0258Y02E60/50
Inventor 李晓琳杨敏张亚伟朱星烨季文姣
Owner SHANGHAI ELECTRICGROUP CORP
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