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A multilayer composite bipolar plate with flow channels, its production method and application

A multi-layer composite, bipolar plate technology, applied in the field of electrochemistry, can solve the problems of poor bending resistance, low conductivity and low strength, and achieve high bending resistance, good conductivity and high tensile strength. Effect

Active Publication Date: 2022-05-13
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a multi-layer composite bipolar plate with flow channels for the problems of low strength, poor bending resistance and low conductivity of the existing bipolar plate of the liquid flow energy storage battery. The board has the advantages of good structural stability, good bending resistance, high conductivity and high current density

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  • A multilayer composite bipolar plate with flow channels, its production method and application
  • A multilayer composite bipolar plate with flow channels, its production method and application

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Effect test

Embodiment 1

[0044] This embodiment discloses a multilayer composite bipolar plate with flow channels such as figure 1 As shown, it includes 10 stacked pole plate units, the pole plate unit includes carbon paper and a carbon-plastic composite layer 3 (original plate plane) coated on one side of the carbon paper, and the multi-layer composite has a flow channel The outer wall of the bipolar plate is a carbon-plastic composite layer; the polar plate unit is provided with a flow channel 4 (concavity). The multi-layer composite bipolar plate with a flow channel is provided with an electrolyte inlet 1 and an outlet 2, and the liquid inlet 1 is communicated with the outlet 2 through the flow channel 4;

[0045] The thickness of the plate unit is 1mm; the thickness of the carbon-plastic composite layer is 0.05mm, and the flow channel is a plurality of rectangular grooves arranged in parallel on the carbon-plastic composite layer, the length, width and depth of which are 0.05mm respectively ×0.02...

Embodiment 2

[0061] This embodiment discloses a multilayer composite bipolar plate with flow channels such as figure 2 As shown, it includes 20 stacked pole plate units, the pole plate unit includes carbon paper and a carbon-plastic composite layer 3 (original plate plane) coated on one side of the carbon paper, and the multi-layer composite has a flow channel The outer wall of the bipolar plate is a carbon-plastic composite layer; the polar plate unit is provided with a flow channel 4 (concavity). The flow channel 4 communicates with the electrolyte inlet 1 and outlet 2 through the common flow channel 5 where the electrolyte collects;

[0062] The thickness of the plate unit is 1.5mm; the thickness of the carbon-plastic composite layer is 0.5mm, and the flow channel is a plurality of rectangular grooves arranged in parallel on the carbon-plastic composite layer, and its length, width and depth are respectively 0.05 mm×0.02mm×0.1mm.

[0063] The carbon-plastic composite layer of the pla...

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Abstract

The present invention provides a multilayer composite bipolar plate with flow channels, its production method and application, the multilayer composite bipolar plate with flow channels includes 2-100 stacked plate units, the The plate unit includes carbon paper and a carbon-plastic composite layer coated on one side of the carbon paper. The outer wall of the multi-layer composite bipolar plate with a flow channel is a carbon-plastic composite layer; the plate unit is provided with a flow channel . The material described in the present invention can withstand various inorganic acid corrosion, and the organic material coated on the surface and the way of cutting first and then coating make it easy to laminate and hot press, and easy to process the electrolyte flow channel, and the electrolyte charge and discharge cycle The data show that it can withstand high current density operation, and its flexible characteristics make it more resistant to stretching and bending. Poor technical problem with tolerating high current densities.

Description

technical field [0001] The invention relates to electrochemical technology, in particular to a multilayer composite bipolar plate with flow channels, its production method and application. Background technique [0002] As one of the important components and key materials of the vanadium battery stack, the bipolar plate is used as a current collector for charge and discharge and a separator of the positive and negative electrode solutions. It is required to have high mechanical strength, high electrical conductivity, and excellent durability. Corrosive, while having a low cost to ensure its engineering application. [0003] At present, the vanadium battery bipolar plates that have been studied more include: carbon, corrosion-resistant metals and conductive plastics. Corrosion-resistant metals are expensive and do not have the prospect of large-scale application for the time being; carbon-based bipolar plates (such as graphite, glassy carbon, etc.) are easily corroded during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0213H01M8/0228H01M8/0221H01M8/0258
CPCY02E60/50
Inventor 高新亮宋明明邹振龙阎成友李洋全成龙刘阳郭大源曹永强
Owner DALIAN RONGKE ENERGY STORAGE GRP CO LTD