Secondary battery and electric device
By using seals composed of glue and metal layers in secondary batteries, defects caused by stress during welding sealing are solved, sealing and safety are improved, and the loss of energy density is reduced.
CN119674377APending Publication Date: 2025-03-21NINGDE AMPEREX TECHNOLOGY LTD
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Patent Information
- Application Number
- CN202411958281.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-28
- Publication Date
- 2025-03-21
AI Technical Summary
Technical Problem
Existing secondary batteries generate stress during welding sealing, resulting in defects such as cracks in the weld, affecting sealing.
Method used
A seal consisting of a glue layer and a metal layer is used. The glue layer is bonded to the shell. The metal layer is located on the back of the glue layer. The water barrier of the metal layer is better than that of the glue layer, which improves the sealing property and thins the seal to reduce energy density loss.
Benefits of technology
It improves the sealing of the secondary battery, reduces the risk of liquid leakage failure, and reduces the loss of energy density. At the same time, it can relieve pressure in time when thermal runaway occurs, improving safety.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a secondary battery and electric equipment. The secondary battery comprises a shell, an electrode assembly and a sealing element, the shell comprises a first shell body and a second shell body, and the first shell body and the second shell body are connected in the first direction and jointly form a containing cavity. The containing cavity is filled with electrolyte, and the electrode assembly is arranged in the containing cavity. The sealing piece is arranged on the periphery of the first shell and the periphery of the second shell in a surrounding mode and seals the connecting position of the first shell and the second shell. The sealing piece comprises an adhesive layer and a metal layer, the adhesive layer is bonded with the first shell and the second shell, and the metal layer is arranged on the side, away from the first shell and the second shell, of the adhesive layer. And the bonding stability of the sealing element and the shell can be improved through the adhesive layer. Through the metal layer, the sealing performance of the sealing element on the first shell and the second shell is improved. And moreover, compared with the sealing element only comprising the adhesive layer, the sealing element comprising the metal layer can make the whole sealing element thinner under the same sealing requirement, thereby being beneficial to reducing the loss of the energy density of the secondary battery.
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