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A tab of a negative electrode transfer welding aluminum sheet used for flexible package lithium battery and a manufacturing method thereof

A lithium battery and flexible packaging technology, which is applied to battery components, circuits, electrical components, etc., can solve the problems that the overall capacity of the battery pack cannot be increased and the manufacturing cost is high, and achieve the effect of reducing weight and saving production costs

Inactive Publication Date: 2019-01-01
厦门纬达科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a tab for a negative electrode transfer welding aluminum sheet for a soft-packed lithium battery and a manufacturing method thereof, so as to solve the problem that the tab of the prior art proposed in the above-mentioned background technology is used in a large-capacity lithium battery. The overall capacity of the battery pack cannot be increased and the manufacturing cost is high

Method used

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  • A tab of a negative electrode transfer welding aluminum sheet used for flexible package lithium battery and a manufacturing method thereof
  • A tab of a negative electrode transfer welding aluminum sheet used for flexible package lithium battery and a manufacturing method thereof
  • A tab of a negative electrode transfer welding aluminum sheet used for flexible package lithium battery and a manufacturing method thereof

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Embodiment 1

[0045] Embodiment 1: A method for manufacturing tabs of negative electrode transfer welding aluminum sheets for flexible packaging lithium batteries, comprising the following steps:

[0046] S1. Aluminum sheet preparation; select an aluminum sheet with a thickness of 0.2mm and a width of 20mm, put the selected aluminum sheet coil into the cutting machine, and cut the required length; after cutting, the aluminum sheet coil is poured Rounded corner treatment; use a flattening machine to flatten the rounded aluminum sheet;

[0047] S2, nickel-plated copper sheet preparation; select a nickel-plated copper strip with a width of 20mm; cut the nickel-plated copper strip according to the required length;

[0048] S3, PP glue preparation; select PP glue according to the required width;

[0049] S4, PET film preparation; according to the size of the tooling fixture, cut the PET film;

[0050] S5, aluminum sheet surface passivation treatment process;

[0051]a) Degreasing: use sodium ...

Embodiment 2

[0082] Embodiment 2: A method for manufacturing tabs of negative electrode transfer welding aluminum sheets for flexible packaging lithium batteries, comprising the following steps:

[0083] S1. Aluminum sheet preparation; select an aluminum sheet with a thickness of 0.5mm and a width of 100mm, put the selected aluminum sheet coil into the cutting machine, and cut the required length; after cutting, the aluminum sheet coil is poured Rounded corner treatment; use a flattening machine to flatten the rounded aluminum sheet;

[0084] S2, nickel-plated copper sheet preparation; select a copper strip with a width of 100mm; cut the copper strip according to the required length;

[0085] S3, PP glue preparation; select PP glue according to the required width;

[0086] S4, PET film preparation; according to the size of the tooling fixture, cut the PET film;

[0087] S5, aluminum sheet surface passivation treatment process;

[0088] a) degreasing: use sodium hydroxide to prepare an a...

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Abstract

The invention discloses a tab of a negative electrode transfer welding aluminum sheet used for a flexible package lithium battery and a manufacturing method thereof. A nickel-plated copper sheet is arranged between two insulating layers, and one end of the nickel-plated copper sheet is welded and connected with the aluminum sheet. The width of aluminum sheet is the same when the of nickel-plated copper sheet. The insulating layers are PP adhesive layers, and the length of the insulating layers is longer than the width of the nickel-plated copper sheet; the width of the nickel-plated copper sheet is D, D >= 20 mm; the tab of the negative electrode transfer welding aluminum sheet of the invention can reduce the weight of the battery pack, and the reduced weight can be used for redesigning the capacity of the whole battery pack, that is, the reduced weight can be transferred to the capacity of the battery, that is, the capacity of the battery pack or the unit weight of the battery pack isincreased. At the same time, the price cost of sheet metal parts is saved.

Description

technical field [0001] The invention relates to the technical field of soft-packaged lithium-ion batteries, in particular to a tab for a negative-electrode transfer-welded aluminum sheet for a soft-packaged lithium battery and a manufacturing method thereof. Background technique [0002] Tabs are metal conductors that lead out the positive and negative currents when the battery is charging and discharging, and are used to connect to external circuits; soft-packed lithium batteries used in the fields of new energy vehicles, energy storage, and military industry have relatively large monomer capacity, and the used The width of the lugs is generally more than 20 mm. Therefore, when assembling the battery pack, external sheet metal connectors are usually used for perforation, riveting or laser welding for reinforcement. Generally connected with copper sheet metal parts, such a design structure cannot improve the overall weight and manufacturing cost of the battery pack. Conte...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M50/531
CPCH01M50/531Y02E60/10
Inventor 许家明翁永华
Owner 厦门纬达科技股份有限公司