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Side edge folding method of lithium ion battery

A lithium-ion battery and battery technology, applied in the field of lithium-ion batteries, can solve the problems of reducing the energy density of the battery, thickening the overall thickness of the battery, etc., and achieve the effects of improving the energy density, saving the size, and improving the reliability.

Inactive Publication Date: 2013-04-03
TIANJIN LISHEN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This way the tape thickens the overall thickness of the battery, reducing the energy density of the battery

Method used

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  • Side edge folding method of lithium ion battery
  • Side edge folding method of lithium ion battery
  • Side edge folding method of lithium ion battery

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] The side folding method of the lithium ion battery of the present invention comprises the following steps,

[0023] 1) Paste the side tape on the upper surface of the side of the lithium-ion battery, wherein, such as figure 1 As shown, the lithium-ion battery has a square structure, which includes a square battery body 10 protruding in the middle, side edges 11 formed on both sides of the battery body 10, and positive pole tabs 12 and negative pole tabs 13 provided on the top of the battery body. The side tape includes a single-sided wrapping tape 20 and a strip-shaped double-sided adhesive 21 pasted on the smooth inner side of the single-sided wrapping tape, wherein the doubl...

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Abstract

The invention discloses a side edge folding method of a lithium ion battery. The side edge folding method comprises the following steps of: 1) adhering a side edge adhesive tape on the upper surface of the side edge of the lithium ion battery; 2) bending the single-side wrapped adhesive tape downwards to the lower surface of the side edge of the lithium ion battery so as to wrap the cross section of the side edge of the battery; 3) rolling the side edge adhesive tape adhered to the upper and lower surfaces of the side edge of the battery so as to eliminate bubbles in the adhesive tape; 4) respectively preheating the upper and lower surfaces of the side edge of the battery by using upper and lower preheating blocks; 5) rotating the lower preheating block so as to vertically bend the side edge of the battery towards a battery body, and adhering a double-surfaced adhesive tape to the side edge of the battery body; and 6) performing hot ironing on the two side surfaces of the battery, and performing the battery side edge treatment after the hot ironing is accomplished. By utilizing the side edge adhesive tape adhering process of the lithium ion battery, the side edge is firmly adhered to the battery body, so that the battery is prevented from opening when being stored and used, and moreover, an aluminum plastic shell is prevented from metal leakage; and not only is the size of the battery in the thickness direction saved, but also the energy density of the battery is increased.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for folding side edges of lithium ion batteries. Background technique [0002] At present, lithium-ion batteries are divided into liquid lithium batteries and polymer lithium batteries. Liquid lithium-ion batteries are mainly coiled with steel and aluminum shells; the energy density of batteries is small, and they are suitable for mobile communications, PDAs, power tools and laptop computers. Polymer lithium-ion batteries are mainly laminated or wound aluminum-plastic flexible packaging, with high energy density, suitable for mobile communications, electric bicycles and electric vehicles that require large-capacity batteries as power sources. [0003] Polymer monomer batteries can meet the needs of this type of power supply through series and parallel connection. Due to the difference in the performance of single cells, the more the number of cells connec...

Claims

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Application Information

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IPC IPC(8): H01M10/058
CPCY02E60/10Y02P70/50
Inventor 张宏芳程君金江敏许岩曹素良张政涛
Owner TIANJIN LISHEN BATTERY
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