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Tab connection method for cylindrical battery cell and pretreatment clamp

A connection method and pretreatment technology, applied to battery pack parts, circuits, electrical components, etc., can solve problems such as position error, easy short circuit on end face, difficult sealing, etc.

Active Publication Date: 2016-03-16
安徽国研新能电芯技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve this goal, this patent designs a pretreatment fixture before cell welding, pre-compressing and shrinking the cell before welding, on the one hand, it solves the problem of easy short circuit in end face welding, on the other hand, it solves the problem of sealing caused by position correspondence error difficult question

Method used

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  • Tab connection method for cylindrical battery cell and pretreatment clamp
  • Tab connection method for cylindrical battery cell and pretreatment clamp
  • Tab connection method for cylindrical battery cell and pretreatment clamp

Examples

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example 1

[0025] The coated positive electrode sheet is cut into 120mm wide, the negative electrode sheet is cut into 125mm wide, and 20mm current collectors are reserved at both ends as tabs, and the order of negative electrode, separator, and positive electrode is used for winding. The core is polished into scales on the winding machine, and the pretreatment fixture is used to set the pressing height to 5mm, the necking angle to 5 degrees, the groove width to 4mm, and the groove depth to 3mm. The cell pretreatment fixture is made according to the set parameters such as Figure 7 , Figure 8 shown.

example 2

[0027] The coated positive electrode sheet is cut into 120mm wide, the negative electrode sheet is cut into 125mm wide, and 15mm current collectors are reserved at both ends as tabs, and the order of negative electrode, separator, and positive electrode is used for winding. The core is polished into scales on the winding machine, and the pretreatment fixture is used to set the pressing height to 5mm, the necking angle to 5 degrees, the groove width to 4mm, and the groove depth to 3mm.

example 3

[0029] The coated positive electrode sheet is cut into 120mm wide, the negative electrode sheet is cut into 125mm wide, and 10mm current collectors are reserved at both ends as tabs, and the order of negative electrode, separator, and positive electrode is used for winding. The core is polished into scales on the winding machine, and the pretreatment fixture is used to set the pressing height to 5mm, the necking angle to 5 degrees, the groove width to 4mm, and the groove depth to 3mm.

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Abstract

The invention discloses a connection method for a cylindrical battery cell and a pretreatment clamp for the cell before welding. In a manner of continuously coating tabs reserved at two ends of a pole piece, the pole piece is wound into two tips of the cell; the two tips are integrally led out as the tabs; the wound cell is treated by the cell pretreatment clamp; the positive tab is welded to an aluminum battery case; the negative tab is welded to a copper battery case; and finally the copper battery case is connected with the aluminum battery case by a mechanical method. According to the treatment mode, on one hand, the operational complexity can be lowered; and on the other hand, the extra load of a battery can be reduced and the side reaction of the battery is reduced. The connection method and the pretreatment clamp are of great significance to development of the cylindrical battery.

Description

technical field [0001] This patent relates to a method for connecting tabs of battery cells and a pretreatment fixture. Specifically, on the one hand, the two ends of the cell are welded on the battery case as tabs by using a through-welding method to increase the stability of the tabs. The ability to withstand large currents reduces the complexity of the process, and at the same time reduces all substances in the battery except the battery core, reduces the possibility of side reactions, and increases the energy density of the battery. On the other hand, the cell pretreatment fixture is designed to pre-press the ends of the positive current collector and the negative current collector respectively, and to press out grooves on the end faces, so that the welded copper cover and aluminum cylinder can be accurately installed in their positions At the same time, compacting the connection between the battery cell and the battery case is conducive to realizing the welding between th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/26H01M50/536H01M50/538
CPCH01M50/531Y02E60/10
Inventor 米国民韩文月
Owner 安徽国研新能电芯技术有限公司
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