A battery cell, a battery device, and an electric device

By adding a positive lithium replenishing agent to the positive active layer of the battery cell and using a low-lithium-consumption first graphite material in the negative active layer, combined with silicon-based materials, the problem of excessively rapid consumption of active lithium ions during battery cell cycling is solved, thereby improving the battery's cycle life, storage life, and dynamic performance.

CN122136427APending Publication Date: 2026-06-02CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Filing Date
2025-01-21
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing battery cells consume active lithium ions too quickly during cycling, resulting in shortened cycle life and storage life. This is especially true in high-energy-density batteries, where the loss of positive electrode active sites and the consumption of negative electrode active lithium are severe.

Method used

By adding a positive electrode lithium replenishing agent to the positive electrode active layer and using a low-lithium-consumption first graphite material in the negative electrode active layer, combined with silicon-based materials, the battery structure is optimized to increase the number of active lithium ions and reduce the consumption of active lithium in the negative electrode.

Benefits of technology

It improves the cycle life and storage life of individual battery cells, while enhancing dynamic performance, increasing battery energy density, and reducing negative electrode volume expansion.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122136427A_ABST
    Figure CN122136427A_ABST
Patent Text Reader

Abstract

This application provides a battery cell, a battery device, and an electrical device. The battery cell of this application includes a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive current collector and one or more single-layer or multi-layer positive active layers located on at least one side of the positive current collector. The negative electrode includes a negative current collector and one or more single-layer or multi-layer negative active layers located on at least one side of the negative current collector. At least one positive active layer includes a positive active material and a positive lithium supplement agent. The positive active material includes lithium nickel cobalt manganese oxide material, wherein the molar ratio of Ni in the total Ni, Co, and Mn elements is 0.8:1–0.97:1. At least one negative active layer includes a silicon-based material and a first graphite material, the first graphite material having a powder OI value of 3.7–7.5. The cycle life and storage life of the battery cell of this application are improved.
Need to check novelty before this filing date? Find Prior Art