Battery pack and vehicle comprising same

The heat diffusion prevention unit with a mica frame and silicone pad in lithium-ion battery packs addresses thermal runaway by blocking heat transfer and discharging gases, enhancing module stability and safety.

WO2026134512A1PCT designated stage Publication Date: 2026-06-25LG 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
2025-08-05
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Lithium-ion battery modules in battery packs experience thermal runaway issues due to heat accumulation and potential ignition, posing risks of thermal transfer and instability, necessitating effective control of high-temperature gases and foreign substances during such events.

Method used

A heat diffusion prevention unit is implemented between battery modules, comprising a mica frame structure with a silicone blocking pad, creating a discharge path for gases and blocking foreign substances, while maintaining spacing and preventing heat transfer.

Benefits of technology

The solution effectively blocks heat transfer and discharges gases upward, preventing thermal runaway propagation and ensuring module stability, allowing for timely safety measures and reducing secondary accidents.

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Abstract

A battery pack according to an embodiment of the present invention comprises: a plurality of battery modules; and a thermal propagation prevention unit disposed between adjacent battery modules, wherein the thermal propagation prevention unit maintains the spacing between the battery modules, blocks heat transfer, and provides a discharge path so that gas generated during thermal runaway of any one of the battery modules can be discharged upward.
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