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Flexible package battery lug welding method

A soft-packed battery and tab welding technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of high battery production cost, high welding cost, damage to pre-soldered solder joints, etc., to reduce metal dust pollution, The effect of improving welding effect and saving production cost

Active Publication Date: 2015-03-25
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the final welding spot of the tab covers the pre-welding spot of the tab, ultrasonic welding is performed again on the original pre-welding spot, which will destroy the pre-welding spot and the final welding effect will also deteriorate
In addition, the fully automatic welding process is complicated and the welding cost is high. The whole process requires four ultrasonic welding machines. The equipment cost is high, the energy consumption is large, and the battery production cost is high.

Method used

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  • Flexible package battery lug welding method
  • Flexible package battery lug welding method

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Embodiment

[0028] The present invention adopts the following technical solutions.

[0029] The plan view of the ear end of the laminated flexible package cell is as follows figure 1 As shown, the one on the left is the exposed aluminum tab foil 1 for the positive electrode, and the one on the right is the exposed copper tab foil 2 for the negative electrode. The range is 10mm-50mm, the gap C between the edge of the battery cell and the tab foil material is applicable to the range of 0mm-100mm, and the gap D between the positive and negative tab foil materials is applicable to the range of 20mm-200mm. The applicable range of cell thickness after lamination is 3.0mm-20mm.

[0030] The tab welding method adopts the following steps.

[0031] Firstly, the aluminum sheet and the nickel sheet are respectively fixed on the exposed aluminum tab foil of the positive electrode sheet and the exposed copper tab foil of the negative electrode sheet. Aluminum sheet and nickel sheet have the same str...

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Abstract

The invention discloses a flexible package battery lug welding method. To achieve the purpose, the technical scheme adopted by the invention is that the flexible package battery lug welding method is characterized by comprising the following steps: firstly, respectively fixing positive plate exposed aluminum lug foil and negative plate exposed copper lug foil by using an aluminum piece and a nickel piece, secondly, cutting the positive plate exposed aluminum lug foil and the negative plate exposed copper lug foil, and finally welding an aluminum strip adhesive lug and a nickel strip adhesive lug on the cut positive plate exposed aluminum lug foil and the negative plate exposed copper lug foil in an ultrasonic manner. By adopting the flexible package battery lug welding method, the manufacturing cost of a flexible package battery is reduced, the metal dust pollution caused by ultrasonic vibration is reduced, the pass percent of the battery is increased, the charge / discharge property of the battery is improved, and the welding effect of the battery lugs is improved.

Description

technical field [0001] The invention belongs to the technical field of soft-packaged lithium-ion batteries, and relates to a method for welding tabs of soft-packaged batteries. Background technique [0002] Flexible packaging lithium-ion batteries have high energy density and good safety performance. Flexible packaging batteries in the form of multi-pole tab structure laminations have good electrical conductivity, high rate performance and good cycle performance. They are especially suitable for large-capacity power batteries, especially for power field. [0003] The tab welding process technology of laminated flexible packaging batteries has gradually matured. With the continuous improvement of automation, the welding efficiency has become higher and higher, and the welding technology has continued to improve, but there are still certain problems. At present, tab welding needs to go through Pre-welding, tab cutting, tab final welding, tab shaping and other processes, first...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M50/533H01M50/534H01M50/536
CPCH01M50/531Y02E60/10
Inventor 关成善宗继月张敬捧王勇
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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