Energy storage elements and energy storage devices

By optimizing the container structure to match the shape of the electrode body and setting through terminals inside the container, the problems of volumetric energy density and terminal connection efficiency in non-aqueous electrolyte batteries are solved, realizing a high-energy-density and low-resistance energy storage element.

CN122095477APending Publication Date: 2026-05-26GS YUASA INT LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GS YUASA INT LTD
Filing Date
2024-10-17
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

There is a gap between the inner wall of the container and the wound electrode body in existing non-aqueous electrolyte batteries, which leads to a reduction in volumetric energy density and makes it difficult to connect the terminals efficiently.

Method used

Design a container structure such that its inner surface follows the shape of the curved and flat portions of the electrode body, and configure terminals to protrude from the inner surface of the container in a direction that extends through the outer surface, thereby reducing the remaining space inside the container, and facilitating electrical connection by setting terminals within the notches.

Benefits of technology

It improves the volumetric energy density of energy storage components, simplifies the connection between terminals and busbars, reduces resistance, and improves output performance.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN122095477A_ABST
    Figure CN122095477A_ABST
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Abstract

An energy storage element includes: an electrode body wound with electrode plates; a container housing the electrode body; and a pair of terminals disposed in the container. The electrode body has a flat shape having a pair of opposing curved portions and a flat portion connecting the pair of curved portions. The container includes: a pair of curved wall portions, each opposite to the pair of curved portions; and flat wall portions, each opposite to two sides of the flat portion of the electrode body. The pair of curved wall portions are a first curved wall portion and a second curved wall portion. The inner surfaces of the first curved wall portion and the second curved wall portion are curved along the curved shape of the curved portion of the electrode body. The inner surface of the flat wall portion is flat along the flat shape of the flat portion of the electrode body. The pair of terminals are disposed in one or more wall portions constituting the container, extending from the second curved wall portion towards the first curved wall portion in a direction that extends from the inner surface of the container to the outer surface, and protruding in the direction from the second curved wall portion towards the first curved wall portion.
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