电池单体、隔离膜、电池、用电装置
By designing different particle sizes and thickness distributions in the separator membrane in lithium-ion batteries, the problem of lithium deposition at battery corners was solved, improving battery capacity and electrolyte wetting effect.
CN119890559BActive Publication Date: 2026-07-17JIANGSU CONTEMPORARY AMPEREX TECH LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU CONTEMPORARY AMPEREX TECH LTD
- Filing Date
- 2025-01-23
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Lithium plating at the corners of lithium-ion batteries leads to reduced battery capacity and poor electrolyte wetting.
Method used
The design employs a separator membrane, where the particle size of the first coating facing the negative electrode is larger than that of the second coating facing the positive electrode. Combined with appropriate thickness and areal density, this ensures a suitable gap between the positive and negative electrodes, promotes electrolyte wetting, and resists expansion of the negative electrode.
Benefits of technology
It improves lithium plating at battery corners, enhances battery capacity and electrolyte wetting effect, and maintains an appropriate gap between positive and negative electrode plates.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN119890559B_ABST
Abstract
本申请涉及一种电池单体、隔离膜、电池、用电装置。电池单体包括：隔离膜、负极极片以及正极极片；隔离膜设置在负极极片和正极极片之间；隔离膜包括基膜；基膜包括第一表面和第二表面；第一表面包括第一涂层，第一涂层包括第一颗粒物；第二表面包括第二涂层，第二涂层包括第二颗粒物；第一颗粒物的DV50大于第二颗粒物的DV50；第一涂层朝向负极极片；第二涂层朝向正极极片。使用隔离膜第一表面和第二表面的颗粒物粒径不同的隔离膜，可以使得电池拐角处正负极极片间具有较为合适的间隙，同时有效保持了电池的容量。最终可以实现在电池容量基本不变的前提下，通过使正负极极片间保持合理的间隙达到解决电池拐角处正负极极片析锂的问题。
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