Safe lithium ion battery coil core and lithium ion battery

Abstract

The invention discloses a safe lithium ion battery coil core and a lithium ion battery containing the safe lithium ion battery coil core. The safe lithium ion battery coil core is formed by winding anegative plate, a positive plate and a diaphragm stacked between the negative plate and the positive plate, wherein an electrode plate on the outer side of the safe lithium ion battery coil core is the negative plate; the tail end of the negative plate on the outer side of the safe lithium ion battery coil core is a blank tail end without a negative active layer; a negative tab is electrically connected to the surface, which deviates from the inner side of the safe lithium ion battery coil core, of the blank tail end; a temperature-resistant insulating layer is bound to the surface, which faces the inner side of the safe lithium ion battery coil core, of the blank tail end; and the temperature-resistant insulating layer and the negative tab are in negative correspondence at an electric connection point on the surface of the blank tail end. The safe lithium ion battery coil core and the lithium ion battery with the same disclosed by the invention have high safety and excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a safe lithium-ion battery winding core and a lithium-ion battery. Background technique [0002] With the continuous development of modern electronic information technology, lithium-ion batteries have become an indispensable chemical power source for modern electronic information products due to their high energy density and long cycle life. However, as the capacity or energy density of the battery cell is getting higher and higher, the battery cell will be destroyed without prediction, which will cause the battery cell to burn. For example, when an electronic product is broken by a foreign object or the side of the cell is squeezed, the cell burns. Therefore, to a certain extent, it is increasingly difficult for existing batteries to meet customers' requirements for safe use of electronic products. [0003] In order to solve this problem, at present, the safety p...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a safe lithium-ion battery winding core and a lithium-ion battery containing the safe lithium-ion battery winding core, to solve the problem that the existing lithium-ion battery is not safe or reassured Technical issues that adversely affect battery chemistry when it comes to safety

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