Lithium battery

A technology for lithium batteries and separators, applied in the field of lithium batteries, can solve the problems of battery quality influence, poor spacing between tabs, etc., to achieve the effect of improving product yield and production efficiency, and stabilizing output products

Active Publication Date: 2021-03-26
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of the battery will be affected by the core pulling of the winding core and the poor spacing of the tabs

Method used

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Embodiment Construction

[0065] The present invention will be described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the present invention in detail, for the convenience of explanation, the accompanying drawings showing the structure of the device will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it should not be limited here. The protection scope of the present invention. It should be noted that the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0066] There is friction between objects in contact with each other. The friction between objects includes dynamic friction and static friction. Static friction exists between two contact surfaces that are stationary to each other, and kinetic friction exists between two contact surfaces that are relatively movi...

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Abstract

The invention discloses a lithium battery which comprises a roll core and tabs, the roll core is formed by stacking and winding an inner diaphragm, a first pole piece, an outer diaphragm and a secondpole piece, and the polarity of the first pole piece is opposite to that of the second pole piece; the inner-layer diaphragm is located on the innermost layer of the roll core, the inner-layer diaphragm and the outer-layer diaphragm are respectively provided with a clamping section, a first straight section connected with the clamping section and located behind the clamping section, and a tail fitting section exceeding the tail end of the first pole piece, the first straight section is located in front of the first pole piece, and the tail fitting section is the tail end of the diaphragm. Theclamping section, the first straight section and the tail fitting section of the inner-layer diaphragm are respectively fitted with the clamping section, the first straight section and the tail fitting section of the outer-layer diaphragm; and the surface friction coefficient of the first straight section of the inner-layer diaphragm is 0.1-0.4. The diaphragm with a specific surface friction coefficient is used, so that the diaphragm is matched with a winding needle material, the production problems of core pulling, poor spacing and the like caused by the diaphragm material can be avoided, andthe product yield and the production efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a lithium battery. Background technique [0002] The lithium battery includes a battery cell and tabs arranged on the battery cell. The battery cell includes a diaphragm, a positive electrode sheet and a negative electrode sheet. The diaphragm is one of the key materials of the lithium battery, which is arranged between the positive and negative electrode sheets of the battery. Isolate the positive and negative plates to prevent short circuit of the battery. At present, the separators used in lithium batteries are generally polyolefin products with a porous structure, such as PE separators, PP separators, PP / PE / PP three-layer separators, etc. Inorganic particles, such as alumina, boehmite, magnesia, etc., are coated on one side or both sides of the substrate diaphragm, and on this basis, the diaphragm is coated with pure glue or glue and ceramic particl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M10/0525H01M50/403H01M50/457
CPCH01M10/0525H01M10/0587Y02P70/50Y02E60/10H01M10/052H01M50/105H01M10/0409H01M50/417H01M50/406H01M50/461H01M50/489H01M50/463H01M50/446H01M50/443H01M50/451H01M50/434
Inventor 赵君义邹浒
Owner ZHUHAI COSMX BATTERY CO LTD
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