Fireproof busbar cap and battery pack equipped with same

The fire-resistant bus bar cap with a ceramicized silicone body and protective layer addresses the issue of insulation failure in battery packs by forming a ceramic structure that maintains insulation and shape during high-temperature fires, preventing short circuits and flame spread.

JP7828465B2Active 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
2023-10-24
Publication Date
2026-03-11

AI Technical Summary

Technical Problem

Conventional bus bar caps in battery packs fail to maintain insulating and airtight properties at high temperatures, leading to short circuits and flame spread during fires due to their soft rubber composition.

Method used

A fire-resistant bus bar cap featuring a ceramicized silicone cap body and a protective layer, made from a specific silicone resin and metal oxide mixture, which maintains insulation and shape even at high temperatures by forming a ceramic structure.

Benefits of technology

The cap effectively prevents short circuits and flame spread by maintaining thermal and electrical insulation, while also providing mechanical support and protection from external forces.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

A fireproof bus bar cap according to the present invention is a bus bar cap for covering a bus bar and an electrical connection part coupled to the bus bar, the bus bar cap having an insertion space for a fastening member for fastening the bus bar and the electrical connection part therebetween, the bus bar cap including a fireproof silicone cap body which is ceramicized at high temperature, and a protective layer which covers the fireproof silicone cap body. Also, a battery pack according to the present invention includes the fireproof bus bar cap.
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Citation Information

Patent Citations

  • Battery tray, battery pack and electric automobile

    CN214124043U

  • Busbar connecting piece

    CN215770643U

  • Composition changeable to ceramic at high temperature

    JP1982047765A

  • Connecting structure for battery

    JP1998064507A

  • Battery module and battery unit

    JP2014130779A