Roll core and lithium ion battery
A core, peel strength technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as sticking, and achieve the effects of avoiding the wrinkling of adhesive tape, improving drop safety, and improving production efficiency
Pending Publication Date: 2021-12-31
ZHUHAI COSMX BATTERY CO LTD
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- Abstract
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- Claims
- Application Information
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Problems solved by technology
[0004] The invention provides a winding core, which is used to solve the problems caused by pasting double-sided hot-melt adhesive paper
Method used
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[0037] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the implementation of the present invention. example, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] Those skilled in the art know that the winding core refers to the battery core prepared by the winding process of the positive electrode sheet, separator and negative electrode sheet, which includes the wound positive electrode sheet, separator and negative electrode sheet, and the winding core is ready after injection and packaging. Lithium ion batteries are avail...
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Abstract
The invention provides a roll core and a lithium ion battery. The first aspect of the invention provides a roll core, and the roll core comprises pole pieces formed by winding from inside to outside, wherein the pole piece located on the outermost layer of the roll core comprises a current collector and a first adhesive layer arranged on at least part of the surface, deviating from the winding center, of the current collector; the pole piece located on the inner layer of the winding core comprises a current collector and a second adhesive layer arranged on at least part of the surface, deviating from the winding center, of the current collector, and the tail end, away from the winding center, of the pole piece on the outermost layer is bonded with the pole piece on the inner layer through the second adhesive layer. According to the roll core provided by the invention, the first adhesive layer and the second adhesive layer are arranged on the surface of the current collector, so that on the basis of playing a bonding role, the problems existing in bonding of double-sided hot melt adhesive paper are avoided, and the preparation efficiency and the falling safety of the lithium ion battery are improved.
Description
technical field [0001] The invention relates to a winding core and a lithium ion battery, and relates to the technical field of secondary batteries. Background technique [0002] Lithium-ion batteries have become the main source of power for consumer electronics and electric vehicles due to their many advantages. With the increasing demand of people, lithium-ion batteries are gradually developing towards fast charging, long life, high energy density and high safety. [0003] At present, in order to improve the drop safety of lithium-ion batteries, a layer of double-sided hot-melt adhesive paper is usually pasted between the bare cell and the aluminum-plastic film, so that the bare cell and the aluminum-plastic film are pasted and fixed together. The beneficial effect brought by this method is to prevent the displacement of the bare cell relative to the aluminum-plastic film when it falls, which will cause the diaphragm at the head and tail of the bare cell to fold after the...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01M10/0587H01M10/0525H01M4/66
CPCH01M10/0587H01M10/0525H01M4/66Y02E60/10Y02P70/50
Inventor 盛东辉何伊彭宁
Owner ZHUHAI COSMX BATTERY CO LTD