A separator, a secondary battery, and an electric device

CN120914452BActive Publication Date: 2026-10-27HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202511191959.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-25
Publication Date
2026-10-27
Estimated Expiration
2045-08-25

AI Technical Summary

Technical Problem

[0003]本申请的目的在于解决现有技术中二次电池的热稳定性较差导致的安全性不足的问题而提出了一种隔膜、二次电池和用电装置

Benefits of technology

[0023]本申请提供的一种隔膜通过在至少一侧表面引入包括陶瓷颗粒和微胶囊颗粒的功能涂层，具体地，微胶囊颗粒的核层包括赤藓糖醇，壳层包括三聚氰胺树脂和纳米二氧化硅，能够有效的提升隔膜的吸收热量的能力以及传导热量的能力，后续应用于二次电池的制备中时，将该功能涂层设置在朝向正极极片侧，得到的二次电池具有良好的热稳定性。

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Abstract

The application discloses a diaphragm, a secondary battery and an electric device, and belongs to the technical field of batteries. The diaphragm provided by the application comprises a porous base material and a functional coating arranged on at least one side surface of the porous base material, wherein the functional coating comprises ceramic particles and microcapsule particles; the microcapsule particles are in a core-shell structure and comprise a core layer and a shell layer; the core layer comprises erythritol, and the shell layer comprises melamine resin and nano-silicon dioxide. The diaphragm provided by the application can effectively improve the heat absorption capacity and heat conduction capacity of the diaphragm by introducing the ceramic particles and the microcapsule particles into the coating, and the secondary battery obtained by applying the diaphragm in the subsequent preparation of the secondary battery has good thermal stability.
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Citation Information

Patent Citations

  • Phase change microcapsule, diaphragm, pole piece, battery and electric device

    CN115966839A

  • Method for controlling temperature inside lithium battery electric core

    WO2012167470A1