Battery cell and battery module comprising same

The battery cell design with a supporter structure addresses gas entrapment and thickness unevenness by collecting gas in a pocket and compensating for thickness variations, ensuring improved safety and performance.

WO2026127258A1PCT designated stage Publication Date: 2026-06-18LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Filing Date
2025-07-28
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Gas trapping between electrodes and uneven thickness distribution in electrode assemblies of battery cells lead to safety issues such as lithium deposition and electrode displacement, necessitating a solution to prevent gas entrapment and compensate for thickness differences.

⚗Method used

A battery cell design featuring a supporter with contact portions overlapping the electrode assembly edges and a support portion forming a pocket to collect generated gas, while compensating for thickness variations by varying the overlap lengths of contact portions to match electrode material sliding patterns.

🎯Benefits of technology

Prevents gas entrapment and compensates for thickness differences, thereby preventing defects like lithium deposition and enhancing battery performance and safety by collecting gas in a pocket and maintaining even pressure within the cell.

✦ Generated by Eureka AI based on patent content.

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    Figure KR2025011182_18062026_PF_FP_ABST
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Abstract

A battery cell according to one embodiment of the present invention may comprise: an electrode assembly in which electrodes and separators are alternately interposed; an exterior member having an accommodation part in which the electrode assembly is accommodated; and a supporter for supporting the accommodation part from the inner side. The supporter can comprise: a pair of contact parts that are in contact with opposing inner surfaces of the exterior member, each of the contact parts at least partially overlapping an edge part of the electrode assembly in the thickness direction of the electrode assembly; and a support part which connects the pair of contact parts, and which is spaced a predetermined interval apart from the circumference of the electrode assembly such that a pocket is defined between the electrode assembly and the support part.
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