Lithium-ion battery cell and its anode plate

Abstract

The invention discloses an anode plate of a lithium ion cell, comprising an anode current collector and an anode diaphragm coated on the anode current collector; the anode diaphragm is provided with a surface filling layer used for antiflaming; and the surface filling layer is coated with an electron blocking layer with the functions of electron blocking and ion conduction. Compared with the prior art, the anode plate of the lithium ion cell is provided with the electron blocking layer so that an isolating diaphragm does not need to be arranged between a cathode plate and the anode plate when the lithium ion cell is manufactured, thereby effectively avoiding the influence of isolating diaphragm tension to the performance of the cell and simplifying the manufacturing process of the lithium ion cell. In addition, the invention also discloses a lithium ion cell adopting the anode plate.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a lithium ion battery core and its anode pole piece. Background technique [0002] With the development of modern society, various mobile devices, such as camcorders, notebook computers, portable DVDs and digital cameras, have become more and more widely used, and lithium-ion batteries have become more and more popular among people, and have become the preferred choice for mobile devices. The ideal power supply has gradually replaced other traditional batteries even in the fields of aviation, aerospace, navigation, automobiles, and medical equipment. [0003] Existing lithium-ion batteries are generally wound or stacked to obtain lithium-ion batteries, and lithium-ion batteries usually include cathode and anode pole pieces and a separator isolated therein. Wherein, the isolation film is spaced between the adjacent cathode and anode sheets, and plays the role of electronic barrier and ion...

AI Technical Summary

Problems solved by technology

[0005] However, in the manufacturing process of lithium-ion batteries, especially in the automatic winding process, it is difficult to control the tension of the pole piece and the tension of the separator during winding, resulting in inconsistent tightness of the inner and outer rings of lithium-ion batteries. Bardo, anode pole piece or copper foil will break, especially on cylindrical lithium-ion batteries, this effect is more prominent

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