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Soft-pack lithium ion battery tab and manufacturing method thereof

A lithium-ion battery and flexible packaging technology, applied in secondary batteries, battery pack components, circuits, etc., can solve problems such as poor bonding force, bubble wrinkles, uneven fusion, etc., to solve the sealing problem and ensure the sealing performance Effect

Inactive Publication Date: 2019-01-29
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 purpose of the present invention is to provide a flexible packaging lithium-ion battery tab and its manufacturing method, to solve the problem of uneven fusion and poor bonding force in the production of tabs of conductors with a width of more than 100 mm in the prior art proposed in the above background technology , produce bubbles and wrinkles and other undesirable phenomena, and cannot be mass-produced

Method used

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  • Soft-pack lithium ion battery tab and manufacturing method thereof
  • Soft-pack lithium ion battery tab and manufacturing method thereof

Examples

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Embodiment 1

[0035] Embodiment 1: A method for making tabs of soft-packed lithium-ion batteries, comprising the following steps:

[0036] S1. Conductor material preparation; select one of the aluminum strips, copper strips or nickel-plated copper strips with a thickness of 0.3mm and a width of 280mm; put the selected conductor coils into the cutting machine, and cut the required Length; after cutting, the conductor rolls are chamfered at 30° along the widthwise edges; the conductors after chamfering are flattened with a flattening machine;

[0037] S2, PP glue preparation; select PP glue according to the required width;

[0038] S3, PET film preparation; cut the PET film 2 according to the size of the tooling fixture; the cut PET film 2 is punched; it is used to cover the PP glue area without punching, and the rest of the area is punched;

[0039] S4, carry out surface passivation process to the material selected in S1:

[0040] a) degreasing: use sodium hydroxide to prepare an aqueous s...

Embodiment 2

[0057] Embodiment 2: A method for making tabs of soft-packed lithium-ion batteries, comprising the following steps:

[0058] S1. Conductor material preparation; select one of the aluminum strips, copper strips or nickel-plated copper strips with a thickness of 0.4mm and a width of 280mm; put the selected conductor coils into the cutting machine, and cut the required Length; the cut conductor rolls are chamfered at 35°C along the widthwise edge; use a flattening machine to flatten the chamfered conductors;

[0059] S2, PP glue preparation; select PP glue according to the required width;

[0060] S3, PET film preparation; cut the PET film 2 according to the size of the tooling fixture; punch the cut PET film 2; use it to cover the PP glue area without punching, and punch the rest of the area;

[0061] S4, carry out surface passivation process to the material selected in S1:

[0062] a) degreasing: use sodium hydroxide to prepare an aqueous solution according to the mass ratio ...

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Abstract

The invention discloses a soft-pack lithium ion battery tab and a manufacturing method thereof. The soft-pack lithium ion battery tab comprises an electric conductor and insulating layers, wherein theelectric conductor is arranged between the two insulating layers; the electric conductor is one of an aluminum strip, a copper strip or a nickel-plated copper strip, the electric conductor is in a cuboid shape, the width of the electric conductor is D,D greater than or equal to 100 mm, and the edge of the electric conductor is provided with chamfers in the width direction; the chamfers at the twoends of the electric conductor aim at reducing the step head of the fracture surface, so that better fusion of PP and end face is ensured when the two ends of the 280-millimeter width of the electricconductor are thermally compounded with PP glue, and the sealing performance of the battery is ensured; after the surface of the electric conductor is passivated, it can be ensured that the binding force is larger after the PP glue and the electric conductor are fused, and the resistance to HF acid electrolyte corrosion of the battery tab can be improved by 2-3 times than that of a general smalltab. The soft-pack lithium ion battery tab and the manufacturing method thereof solve the sealing problems of air-blowing, liquid leakage and the like caused by corrosion of a high-capacity battery tab, and solve the problem that the battery tabs cannot be produced in batch.

Description

technical field [0001] The invention relates to the technical field of soft-packaged lithium-ion batteries, in particular to a flexible-packaged lithium-ion battery tab and a manufacturing method thereof. Background technique [0002] Flexible packaging lithium-ion batteries are composed of positive and negative electrode materials, positive and negative electrode current collectors, positive and negative electrode tabs, electrolyte, separator, and aluminum-plastic packaging film. Among them, the tabs are metal conductors that lead out the positive and negative currents when the battery is charging and discharging, and need to be connected to an external circuit. The width of the tab conductors used in the existing 3C products of flexible packaging lithium-ion batteries is generally 1.5 to 10 mm wide, including the power flexible packaging lithium-ion batteries currently used in new energy vehicles, and the width of the tab conductors used is generally They are all 20-80 mm...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M10/0525H01M50/531
CPCH01M10/0525H01M50/531Y02E60/10
Inventor 许家明翁永华
Owner 厦门纬达科技股份有限公司