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Preparation method of wound polymer lithium battery and wound polymer lithium battery

A polymer and lithium battery technology, applied in secondary batteries, battery pack components, circuits, etc., to achieve the effects of rapid absorption, shortening time, and reducing deviation

Active Publication Date: 2017-02-15
HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, prior art still needs to improve and develop

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  • Preparation method of wound polymer lithium battery and wound polymer lithium battery
  • Preparation method of wound polymer lithium battery and wound polymer lithium battery

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] Figure 1 to Figure 2 A wound polymer lithium battery according to the present invention is schematically shown.

[0024] According to one aspect of the present invention, there is provided a method for preparing a wound polymer lithium battery, comprising the steps of:

[0025] (1) Prepare flat positive electrode sheet 003 and negative electrode sheet 002, positive electrode ear 005, negative electrode ear 006 and separator 001;

[0026] (2), such as figure 1 First wind the separator 001 with a winding needle, then place the beginning of the negative electrode sheet 002 between the above-mentioned separators 001, and then put the beginning end of the positive electrode sheet 003, and the negative electrode sheet 002 and the positive electrode sheet 003 are separated by the separator 001 , where an empty foil position is reserved at the beginning an...

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Abstract

The invention discloses a preparation method of a winding polymer lithium battery and a winding polymer lithium battery. The winding polymer lithium battery includes a packaging case and a winding body assembled in the packaging case. The winding The winding body includes a diaphragm, a positive electrode piece, and a negative electrode piece. The positive electrode piece and the negative electrode piece are separated by a diaphragm and wound for a certain number of turns. The positive electrode ear and the negative electrode ear are respectively welded at the ends of the positive electrode piece and the negative electrode piece. The exposed end of the positive electrode tab is perpendicular to the width direction of the positive electrode sheet, and the exposed end of the negative electrode tab is perpendicular to the width direction of the negative electrode sheet. Compared with the internal structure of the winding polymer lithium battery and its positive and negative electrodes in the prior art, the spot welding method and position of the tabs are adjusted, the winding structure of the battery core is changed, and the deviation of the center distance of the tabs is reduced. , The direction of the number of layers of the core is towards the position of the airbag bag, which shortens the time for the electrolyte to enter the core, facilitates the rapid absorption of the electrolyte, and reduces the standing time after injection.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a preparation method of a winding polymer lithium battery and the winding polymer lithium battery. Background technique [0002] Soft-pack lithium-ion batteries have the advantages of light weight and good safety performance, so they are increasingly widely used in mobile electronic devices such as Bluetooth, 2G / 3G mobile phones, notebook computers, tablet computers, cameras, and portable mobile power supplies, especially for their excellent Safety performance makes it increasingly replace liquid aluminum or steel lithium-ion batteries. [0003] Polymer lithium-ion batteries can be customized (any size can be customized) and have high energy density. Although polymer lithium-ion batteries have good safety, the winding mechanism also has certain defects. Injected batteries, the electrode surface directly faces the injection port, the electrolyte needs to bypass the electrode surface and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0587
CPCH01M10/0587H01M50/538Y02E60/10Y02P70/50
Inventor 戈志敏于紫阳
Owner HUIZHOU LIWINON NEW ENERGY TECH CO LTD
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