Adhesive and manufacturing method thereof, separator, electrode plate, electrode assembly, battery cell, battery, and power consumption device

A polyacrylate copolymer and ceramic core adhesive enhances adhesion and hardness, addressing poor adhesion issues in conventional battery adhesives, improving cycle performance and safety.

JP7725724B2Active Publication Date: 2025-08-19CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
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Patent Information

Application Number
JP2024520581
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2023-01-04
Filing Date
2023-06-02
Publication Date
2025-08-19
Estimated Expiration
2043-06-02

AI Technical Summary

Technical Problem

Conventional battery adhesives exhibit poor adhesion performance and low hardness, leading to ineffective adhesion of battery components, which deteriorates cycle performance and poses safety issues.

Method used

A coating layer comprising a polyacrylate copolymer and a ceramic core is applied to the separator, enhancing adhesion, cold-press adhesive strength, and hardness, while reducing electrochemical impedance.

Benefits of technology

The adhesive improves the cycle performance and safety of batteries by providing strong adhesion and reducing impedance, thereby improving the dynamic performance of lithium-ion batteries.

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Patent Text Reader

Abstract

This application discloses an adhesive and its manufacturing method, a separator, a plate, an electrode assembly, a battery cell, a battery, and a power consumption device, and relates to the field of battery technology. The adhesive includes a coating layer and a core disposed within the coating layer, where the coating layer includes a polyacrylate-based copolymer, and the core includes a ceramic. When the adhesive is applied to a separator and used in a battery, it has strong adhesion, improves the cold press adhesion of the battery core and the hardness of the battery core, reduces the electrochemical impedance, and improves the cycle performance of the battery.
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Citation Information

Patent Citations

  • Ceramic membrane, application of ceramic membrane to battery and battery comprising ceramic membrane

    CN103035866A

  • A preparation method of a coating modified ceramic separator for lithium ion battery

    CN109192903A

  • Diaphragm slurry, preparation method and application thereof

    CN112259913A

  • Core / shell type fine particle and lithium secondary battery including the fine particle

    JP2006182925A

  • An aqueous composition used for improving a separator for a lithium-ion battery, an improved separator, and a battery

    JP2017525100A