Box cover assembly, battery pack and electric device

By using an insulating barrier composed of insulating fireproof boards and tape in the battery pack cover assembly, the problems of high-temperature burning and arcing of the cover during thermal runaway are solved, thereby improving the reliability and service life of the battery pack.

CN121566035BActive Publication Date: 2026-07-14JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
Filing Date
2025-12-09
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing battery pack cover assemblies are prone to softening or ignition due to high temperatures during thermal runaway, and their insufficient conductivity or insulation performance can lead to arcing, reducing the reliability of the battery pack.

Method used

The box cover assembly is made of insulating fireproof board and insulating fireproof tape. The insulating fireproof tape covers the transition area and overlaps with the insulating fireproof board to form a continuous insulating barrier, thereby enhancing the insulating and fireproof performance of the box cover.

Benefits of technology

It effectively prevents the cover from being burned by high temperature or broken by high voltage, increases the insulation and fire protection range, improves the reliability and service life of the battery pack, prevents the spread of flames, and enhances insulation strength.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121566035B_ABST
    Figure CN121566035B_ABST
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Abstract

The application relates to a box cover assembly, a battery pack and an electric device, which comprises a box cover, an insulating fireproof plate and an insulating fireproof tape. The inner surface of the box cover comprises a fixed edge area, a battery protection area and a transition area arranged around the battery protection area. The battery protection area is located on the inner side of the fixed edge area, and the two are arranged staggered in the thickness direction of the box cover. The fixed edge area is connected to the battery protection area through at least part of the transition area. The insulating fireproof plate is connected to the box cover and covers the battery protection area. The transition area is bonded with the insulating fireproof tape, and the insulating fireproof tape comprises a first overlapping part located in the battery protection area. The first overlapping part overlaps with the insulating fireproof plate and is continuously arranged along the four peripheral edges of the insulating fireproof plate. The technical scheme of the application can prolong the service life of the box cover and improve the reliability of the battery pack.
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Citation Information

Patent Citations

  • Electronic equipment and battery thereof

    CN118263591A

  • Soft package battery module capable of preventing thermal runaway

    CN214411321U