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Bending method for tabs of flexible packaged lithium-ion batteries

A lithium-ion battery, flexible packaging technology, applied in secondary battery manufacturing, battery pack components, circuits, etc., can solve the problems of inability to bend directly, difficult to bend, and easy to protrude the pole ears, so as to improve productivity and The effect of processing cost, easy welding positioning, and material cost saving

Active Publication Date: 2016-08-24
HENAN LI POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current methods of splicing, welding, and tab bending of two rolls of lithium-ion batteries in flexible packaging are basically welding first, then cutting, and finally bending. It is too long to cause material waste. This welding method is not easy to position the welding end of the composite tab at the front. The welding needs to be cut before it can be bent. It cannot be bent directly, and it is difficult to bend. Afterwards, it will affect the appearance of the battery, and in severe cases, the aluminum-plastic film will be pierced, causing the battery to be scrapped

Method used

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  • Bending method for tabs of flexible packaged lithium-ion batteries
  • Bending method for tabs of flexible packaged lithium-ion batteries
  • Bending method for tabs of flexible packaged lithium-ion batteries

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Embodiment Construction

[0018] The method for bending tabs of the flexible packaged lithium-ion battery of the present invention comprises the following steps:

[0019] (1) if figure 1 As shown, the splicing of two winding cores: align the two winding cores of the soft-packed lithium-ion battery together, and fix them with lithium-ion battery special tape 6; keep the two tabs 3 of the first winding core 1 vertical, and place the second winding core The two tabs 4 of 2 are attached to the battery separator 5, bent 90° towards the tab 3 of the first winding core 1, and cling to the tab 3 of the first winding core 1; after bending, the tabs of the first winding core 1 The tab 3 and the tab 4 of the second winding core 2 are combined to form a reserved tab;

[0020] (2) if figure 2 , 4 As shown, the soft-packed composite tab 7 is welded to the spliced ​​winding core: use an ultrasonic welder to weld the welded parts 71 of the two customized soft-packed composite tabs 7 to the two reserved tabs;

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Abstract

The invention provides a method for bending tabs of soft-packed lithium-ion batteries with reduced bending difficulty and material cost, which includes the following steps: (1) splicing two cores; (2) soft-pack composite tabs and splicing Core welding: Use an ultrasonic welder to weld the welded parts of the two custom-made soft-packed composite tabs to the two reserved tabs; (3) Bending the tabs. The method for bending the lugs of the two roll cores of the soft-packed lithium-ion battery of the present invention adopts the method of welding and reserving the lugs before bending, which is easy to weld and position, and easy to bend; The processing is convenient; the welding ends of the tabs of the two cores and the soft-packed composite tabs are short, saving material costs; directly bent after welding without cutting, reducing one process, and improving productivity and processing costs.

Description

technical field [0001] The invention relates to a production method of a lithium-ion battery, in particular to a method for bending tabs of two rolled cores of a soft-packed lithium-ion battery. Background technique [0002] The current methods of splicing, welding, and tab bending of two rolls of lithium-ion batteries in flexible packaging are basically welding first, then cutting, and finally bending. It is too long to cause material waste. This welding method is not easy to position the welding end of the composite tab at the front. The welding needs to be cut before it can be bent. It cannot be bent directly, and it is difficult to bend. Finally, it will affect the appearance of the battery, and in severe cases, the aluminum-plastic film will be punctured, causing the battery to be scrapped. Contents of the invention [0003] The invention provides a method for bending the tabs of two winding cores of a soft-packaged lithium-ion battery, which reduces the bending diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M2/26H01M50/528H01M50/531
CPCH01M10/04H01M50/531Y02E60/10Y02P70/50
Inventor 邬文杰李保鹏张明明侯春霞何炎
Owner HENAN LI POWER SUPPLY