液流电池用双极板、液流电池以及电池堆

By optimizing the surface roughness of the bipolar plates and the electrolyte inlet and outlet structures of the flow battery, and eliminating the flow channel design, the problems of electrolyte flow dead zones and leakage were solved, achieving high power density and low cost electrochemical performance improvement.

CN116936837BActive Publication Date: 2026-07-17GUONENG SCIENTIFIC & TECHNOLOGICAL ACHIEVEMENTS TRANSFORMATION (BEIJING) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUONENG SCIENTIFIC & TECHNOLOGICAL ACHIEVEMENTS TRANSFORMATION (BEIJING) CO LTD
Filing Date
2022-03-31
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing bipolar plate designs for flow batteries suffer from numerous dead zones in electrolyte flow, and their electrochemical performance needs improvement. Furthermore, electrolyte leakage is a common problem during assembly.

Method used

Design a bipolar plate for flow batteries with a surface roughness Ra of 0.05-12.5μm. The electrolyte inlet and outlet are structured as a straight cylindrical section and an expansion/contraction section of a specific shape. The traditional flow channel structure is eliminated. The surface roughness is improved by methods such as sanding, spraying carbon powder or activated carbon layer. The material is selected from graphite/polymer composite materials, etc.

Benefits of technology

It improves the power density of flow batteries, simplifies the manufacturing process, reduces costs, and reduces the risk of electrolyte leakage during assembly, exhibiting excellent electrochemical performance.

✦ Generated by Eureka AI based on patent content.

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Abstract

本发明涉及液流电池领域，具体涉及一种液流电池用双极板、液流电池以及电池堆，该双极板上设置有电解液进口部和电解液出口部，且所述双极板不设置电解液流道，所述双极板的表面粗糙度Ra为0.05‑12.5μm；其中，沿电解液的流动方向，所述电解液进口部依次分为第一直筒段和扩径段；所述电解液出口部依次分为缩径段和第二直筒段。本发明提供的液流电池用双极板，具有制备性能优异、工艺简单、成本低和环境友好的优点；将本发明提供的双极板组装成液流电池，电池表现出优异的电化学性能。
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Citation Information

Patent Citations

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