Electrode assembly and lithium-ion battery

By designing a second active material layer with high adhesion and high conductivity on the lithium-ion battery electrode, the lithium-ion battery is eliminated during the charging and discharging process, extending the battery life and improving the battery safety.

WO2025113482A1 Publication Date: 2025-06-05JIANGSU TIANHE ENERGY STORAGE CO LTD
6 Cites 1 Cited by

Patent Information

Application Number
PCT/CN2024/134867
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-11-27
Filing Date
2024-11-27
Publication Date
2025-06-05

AI Technical Summary

Technical Problem

During the charging and discharging of Li+, lithium-ion batteries, the lithium-ion battery is caused by repeated embedding and disengagement of Li+ on the pole ear side, resulting in a shortened battery life and an increased risk of battery cell safety.

Method used

An electrode assembly is designed, wherein the electrode sheet includes both sides of the current collector with empty foil areas, and the central surface of the current collector is coated with a coating layer, and the coating layer is composed of a first active material layer and a second active material layer, and the adhesion and conductivity of the second active material layer are higher than that of the first active material layer.

Benefits of technology

By improving the adhesion and conductivity of the electrode side, the overcurrent capability of the lithium-ion battery on the electrode side during charging and discharging is enhanced, the polarization and lithium-ion phenomenon are reduced, and the service life of the battery cell is extended.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

Provided in the present invention are an electrode assembly and a lithium-ion battery. The electrode assembly comprises electrode plates and a separator between the electrode plates, wherein each electrode plate comprises a current collector; the surface in the middle of the current collector is provided with a coating layer; two sides of the current collector are blank foil areas; the coating layer comprises a first active material layer and second active material layers; and the second active material layers are respectively located on two sides of the first active material layer and are close to the blank foil areas, the bonding strength of the second active material layers being greater than the bonding strength of the first active material layer, and the electrical conductivity of the second active material layers being higher than the electrical conductivity of the first active material layer. By means of the present invention, the over-current capacity at a tab side of a lithium-ion battery during charging / discharging can be improved, such that the polarization is reduced the battery is prevented from lithium plating during long-term circulation, and the consumption of an electrolyte is also reduced, and the service life of a battery cell is prolonged.
Need to check novelty before this filing date? Find Prior Art