Battery module with improved safety

The battery module design with a barrier member and bus bar assembly effectively prevents thermal runaway propagation in lithium secondary batteries by blocking vent gas and flames, improving safety.

JP7828418B2Active Publication Date: 2026-03-11LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-11-05
Publication Date
2026-03-11

AI Technical Summary

Technical Problem

Lithium secondary batteries are vulnerable to thermal runaway propagation when densely packed, leading to potential fires and explosions, which can cause significant damage.

Method used

A battery module design featuring pouch-type cells with a barrier member interposed between cells, protruding to cover the seal and terrace portions, and integrated with a bus bar assembly to prevent vent gas and flames from spreading.

Benefits of technology

Effectively prevents thermal runaway propagation by blocking vent gas and flames between adjacent cells, enhancing safety and reducing the risk of chain reactions.

✦ Generated by Eureka AI based on patent content.

Smart Images

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Patent Text Reader

Abstract

To provide a battery module configured to improve safety by effectively suppressing a thermal runaway event, and a battery pack, a vehicle, and the like including the same.SOLUTION: The present invention discloses a battery module with improved safety in a specific event situation such as thermal runaway. The battery module according to one aspect of the present invention includes: a plurality of pouch-type battery cells each having an accommodation portion and a sealing portion and configured to be stacked on each other; a module case configured to accommodate the plurality of pouch-type battery cells in an inner space thereof; and a barrier member interposed between the accommodation portions of neighboring pouch-type battery cells and configured to have at least one side protrusively extending from a portion between the accommodation portions of the neighboring pouch-type battery cells to a portion between the sealing portions of the neighboring pouch-type battery cells.SELECTED DRAWING: Figure 2
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Citation Information

Patent Citations

  • Insulation sheet and battery pack

    JP2020035645A

  • Apparatus for mitigation of thermal event propagation for battery systems

    WO2020204901A1