A single cell and a battery pack

By setting a recessed area inside the battery casing and combining it with the arc-shaped design of the connector and sealant layer, the problem of space reduction caused by the sealing structure of the battery injection hole is solved, thereby improving battery capacity and structural stability and enhancing the product competitiveness of the battery pack.

CN224304773UActive Publication Date: 2026-05-29CHINA AVIATION LITHIUM BATTERY RES INST CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA AVIATION LITHIUM BATTERY RES INST CO LTD
Filing Date
2025-05-09
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In the prior art, the sealing structure of the battery injection hole reduces the internal space of the battery casing, affecting the battery capacity. This is especially true in battery packs with a large number of batteries arranged in an array, which reduces the product's range and competitiveness.

Method used

An injection hole is set in the recessed area and fixed to the shell by a connector. Combined with the sealant layer, an arc-shaped part is formed to reduce the space occupied by the sealant layer in the axial direction, while maintaining the sealing effect and improving the battery capacity.

Benefits of technology

While maintaining a tight seal, the clearance height inside the battery casing was increased, improving battery capacity, ensuring the stability and sealing of the battery structure, and preventing the sealant layer from overflowing and affecting the flatness of the installation.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224304773U_ABST
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Abstract

The application discloses a single battery and a battery pack, the single battery comprising a shell, a connecting piece and a sealing adhesive layer, the shell being provided with a recessed area, the bottom surface of the recessed area being provided with a liquid injection hole; the connecting piece is riveted with the shell to seal the liquid injection hole; the connecting piece comprises a first connecting part and a second connecting part, the first connecting part being at least partially arranged in the liquid injection hole, and the second connecting part being connected to the recessed area; the sealing adhesive layer is arranged between the second connecting part and the recessed area, an arc-shaped part being formed between the outer wall surface of the recessed area and the hole wall of the liquid injection hole, the sealing adhesive layer being at least partially located between the arc-shaped part and the first connecting part, and the radius range of the arc-shaped part being 0.1mm-2mm. The application seals the liquid injection hole by the connecting piece combined with the sealing adhesive layer, and sets the arc-shaped part with a certain radius range, so as to provide a setting space for the sealing adhesive layer and maintain sealing, and meanwhile, the space occupation of the sealing structure in the direction perpendicular to the liquid injection hole is reduced, the depth requirement of the recessed area is reduced, and the accommodation space in the shell is improved.
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