Battery module and battery pack containing the same

The battery module design with a refrigerant system and venting mechanism addresses cooling and thermal runaway issues, improving efficiency and safety by direct cooling and containing thermal runaway gases, enhancing energy density and stability.

JP7864266B2Active Publication Date: 2026-05-22LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
JP Β· JP
Patent Type
Patents
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Filing Date
2025-02-26
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Conventional battery modules and packs face challenges in cooling efficiency, heat dissipation, and the risk of thermal runaway, which can lead to fire or explosion, and are heavy due to their structure, limiting energy density and stability.

Method used

A battery module design with a refrigerant system featuring expansion members that expand at predetermined temperatures to close refrigerant openings, direct cooling of battery cells, and a venting mechanism to manage thermal runaway gases, enhancing cooling efficiency and preventing gas propagation.

Benefits of technology

Improves cooling efficiency, increases energy density, and enhances stability by preventing thermal runaway gas spread, thus extending battery life and safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

A battery module according to one embodiment of the present invention may include a battery cell stack in which a plurality of battery cells are stacked, a module frame that houses the battery cell stack, an inlet port through which a refrigerant flows into the module frame, an outlet port through which the refrigerant flows out from the module frame, and expansion members disposed at the inlet port and the outlet port, respectively, which expand in volume when they reach a predetermined temperature.
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