Bus bar assembly and battery pack including the same

By using refractory materials and partition wall structure in the bus bar assembly, the short circuit problem caused by melting the bus bar in the flame is solved, and the insulation and safety of the battery pack are improved.

CN120345111APending Publication Date: 2025-07-18LG ENERGY SOLUTION LTD
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Patent Information

Application Number
CN202480005481.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-08-08
Filing Date
2024-07-25
Publication Date
2025-07-18

AI Technical Summary

Technical Problem

Existing bus bar assembly is prone to melting under the flames inside the battery pack, resulting in the risk of short circuits and explosions, and cannot maintain electrical insulation characteristics.

Method used

The insulating layer is respectively wrapped with the first and second bus bars, and a partition wall is formed at the end through the cap structure. The insulation is maintained using refractory materials such as refractory silicone and mica materials, and the structural stability is enhanced with the glass fiber layer.

Benefits of technology

Even in a flame environment, the insulation characteristics of the bus bar can be maintained, prevent short circuits, and improve the safety and fire resistance of the battery pack.

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Abstract

A bus bar assembly according to an embodiment of the present invention includes: first and second bus bars arranged side by side with each other, in which each of the first and second bus bars includes a body portion and an end portion extending from either end of the body portion and having a through hole defined therein; a first insulating layer surrounding the body portion of the first bus bar; a second insulating layer surrounding the body portion of the second bus bar; and a cap simultaneously surrounding an end portion of the first bus bar and an end portion of the second bus bar adjacent to each other.
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