Battery cell and electric device

By adding an additional venting path to the cell cover assembly, the problem of insulating tape clogging the venting holes was solved, achieving stable venting and anti-bulging effects for the cells.

CN122178028APending Publication Date: 2026-06-09SVOLT ENERGY TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SVOLT ENERGY TECHNOLOGY CO LTD
Filing Date
2026-01-23
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing battery cell structures, the insulating tape on the electrode surface and the vent holes are prone to physical interference, resulting in incomplete venting and causing the battery cell to bulge.

Method used

An additional venting path is added to the cover plate assembly by attaching a liquid injection insert to the side of the main body facing the first plastic part, forming a new venting channel that connects the venting gap, the liquid injection groove, and the liquid injection hole. This ensures that the liquid injection groove is close to the internal air pressure of the cell, and avoids the tape from blocking the venting hole.

Benefits of technology

This effectively avoids the swelling problem caused by incomplete venting of the battery cell, improves venting efficiency and stability, and ensures that the gas in the battery cell is smoothly discharged during the liquid injection and pre-charging stages.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122178028A_ABST
    Figure CN122178028A_ABST
Patent Text Reader

Abstract

This application relates to the field of battery manufacturing technology, and in particular to a battery cell and an electrical device. The battery cell includes a cover plate assembly and a housing. The cover plate assembly includes a cover plate body and a first plastic part. The cover plate body includes a plate main body and an electrolyte injection insert. The electrolyte injection insert is attached to the side of the plate main body facing the first plastic part. The cover plate body has an electrolyte injection hole that penetrates the plate main body and the electrolyte injection insert along the thickness direction. The first plastic part includes an electrolyte injection groove corresponding to and communicating with the electrolyte injection hole. The bottom wall of the electrolyte injection groove has a through-hole for electrolyte flow. The housing is connected to the outer edge of the cover plate body, and there is a venting gap between the housing and the first plastic part. The electrolyte injection insert has a venting channel that connects the venting gap and the electrolyte injection groove. This application solves the problem in existing battery cell structures where the insulating tape on the electrode surface and the electrolyte flow hole below the plastic part of the cover plate easily form physical interference, thereby blocking the venting hole and causing incomplete venting of the battery cell, resulting in battery cell swelling.
Need to check novelty before this filing date? Find Prior Art