Battery cell, battery device, and electric device

By setting a first part and a second part of different thickness on the outer wall of the battery cell, the problem of emission of emissions during thermal runaway of the battery cell is solved, and the reliability and energy density of the battery cell are improved.

CN224708928UActive Publication Date: 2026-09-01CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202521403925.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-04
Publication Date
2026-09-01
Estimated Expiration
2035-07-04

AI Technical Summary

Technical Problem

In the event of thermal runaway, high-temperature and high-pressure emissions from existing battery cells can easily melt and be ejected through the outer casing near the pressure relief mechanism, leading to thermal runaway of adjacent battery cells and affecting reliability.

Method used

A first part and a second part of different thickness are provided on the outer wall of the battery cell. The first part is located on the side of the pressure relief mechanism and is thicker than the second part, which delays the melting time of the first part and reduces the risk of emission.

Benefits of technology

It slows down the melting time of the wall at the connection of the pressure relief mechanism, reduces the risk of thermal runaway of adjacent battery cells, and improves the reliability and energy density of battery cells.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides a battery monomer, a battery device and a power utilization device. The battery monomer comprises a shell, a pressure relief mechanism and an electrode assembly. The shell has a first wall, and the pressure relief mechanism is arranged on the first wall. The first wall comprises a first part and a second part. The thickness of the first part is greater than the thickness of the second part. The first part is located on the side of the pressure relief mechanism and is connected with the pressure relief mechanism. The first direction intersects the thickness of the first wall. The electrode assembly is accommodated in the shell. The battery monomer provided by the application is beneficial to delaying the time for the complete melting of the first part connected with the pressure relief mechanism, reducing the risk of the emission in the battery monomer being emitted to the adjacent battery monomer through the first wall which is completely melted, thereby causing a larger range of thermal runaway, and thus the reliability of the battery monomer is improved.
Need to check novelty before this filing date? Find Prior Art