电池单体、电池和用电装置
By setting a lithium replenishment layer on the negative electrode, lithium ions are slowly released by forming an electrical circuit using the voltage difference. This solves the problems of low coulombic efficiency and poor cycle performance in the first cycle of lithium-ion battery cells, improves battery performance, and reduces the risk of lithium plating.
CN116936732BActive Publication Date: 2026-07-17CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2022-04-08
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing lithium-ion battery cells have low coulombic efficiency in the first week of formation, poor cycle performance and storage performance, and are subject to lithium plating and short circuit risks.
Method used
A lithium replenishment layer is set on the negative electrode. The standard electrode potential of lithium against hydrogen is lower than the potential of the negative electrode active material layer, forming an electrical circuit to slowly release lithium ions and prevent lithium ions from diffusing into the negative electrode active material layer.
Benefits of technology
It improves the initial coulombic efficiency, cycle performance, and storage performance of individual battery cells, reduces the risk of lithium plating, and ensures battery safety.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116936732B_ABST
Abstract
本申请涉及一种电池单体、电池和用电装置。电池单体包括正极极片和负极极片。负极极片包括包括负极集流体、设置于负极集流体的至少一个表面上的负极活性物质层以及补锂层，负极活性物质层包括第一部和与第一部连接的第二部，第一部凸出于正极极片，第二部与正极极片相对设置，补锂层设置于第一部的背离负极集流体的至少部分表面。根据本申请实施例的负极极片能够提高电池单体的首次库伦效率、循环性能和存储性能。
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