负极极片、二次电池、电池模块、电池包和用电装置
By designing a multi-layer negative electrode structure, controlling porosity and material parameters, and optimizing the composition of the negative electrode active material, the problem of balancing high capacity and fast charging performance in lithium-ion batteries has been solved, achieving a balance between high capacity and fast charging.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2022-06-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium-ion batteries struggle to balance high battery capacity and fast charging performance simultaneously. High battery capacity often means limited fast charging performance, while improving fast charging performance can reduce battery capacity.
The negative electrode sheet is designed as a multi-layer structure. By controlling parameters such as porosity, particle size, friction coefficient, compressive strength and resistivity of each layer, the porosity ratio of the first negative electrode material layer and the second negative electrode material layer is made to be within the range of 1.11≤Q2/Q1≤1.45. Combined with negative electrode active materials with specific particle size, friction coefficient, compressive strength and resistivity, carbon-based or silicon-based materials are used to optimize the composition and thickness of the material layers.
This technology enables secondary batteries to maintain high battery capacity while significantly shortening charging time and improving charging speed and battery performance.
Smart Images
Figure CN117941092B_ABST