Battery pack case, battery pack including same, method for cooling battery pack, and vehicle including same

By using a bimetallic component with a blocking member in the battery pack housing, the problem of reduced cooling performance during thermal runaway events is solved, improving the safety and reliability of the battery pack, extending the cooling effect of the coolant, and enhancing the overall performance of the vehicle.

CN122374892APending Publication Date: 2026-07-10LG ENERGY SOLUTION LTD
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Patent Information

Application Number
CN202580007350.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-09-09
Filing Date
2025-08-26
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing battery pack casings exhibit reduced cooling performance during thermal runaway events, leading to safety and reliability issues, and there is room for improvement in the cooling methods for battery packs in vehicles.

Method used

The system employs a blocking component, including a bimetallic part, which utilizes the difference in thermal expansion coefficients of different metals to automatically close the cooling channel in the event of thermal runaway, preventing coolant from flowing into the runaway battery cell assembly and extending the cooling effect of the coolant.

Benefits of technology

It improves the safety and reliability of the battery pack casing, extends the cooling performance of the coolant, ensures the cooling effect of other battery cell components in the event of thermal runaway, and enhances the overall safety and performance of the vehicle.

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Abstract

According to an exemplary embodiment of the present invention, a battery pack case is provided. The battery pack case includes: a bottom plate intersecting a first direction; a cooling channel in the bottom plate and including a sub-flow path and a main flow path for supplying cooling water to the sub-flow path; and a blocking member inside the sub-flow path, in which the blocking member may include a bimetal portion including a first metal and a second metal, the first metal and the second metal being arranged in a second direction crossing the first direction and having different thermal expansion coefficients.
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