Soft-packed lithium battery lead metal strip and insulation sheet fusion technique

Abstract

The invention discloses a soft-packed lithium battery lead metal strip and insulation sheet fusion technique; a lead metal strip to be processed is placed on a heating fixture for fixing; the lead metal strip is heated through a heating device to respectively attach the two insulation sheets to the two surfaces of the heated lead metal strip; the insulation sheet and the lead metal strip are fusedtogether through a lamination mold; and the fused insulation sheet and the metal strip are cooled and solidified. The soft-packed lithium battery lead metal strip and insulation sheet fusion technique provided by the invention does not damage the outer surface structure of the insulation sheet and improves the production quality.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a fusion process of a tab metal strip and an insulating sheet of a soft-packed lithium battery. Background technique [0002] Lithium-ion battery is a kind of rechargeable battery. Due to its advantages of high working voltage, long cycle life, high specific energy, no memory effect, and small self-discharge, it is widely used in digital products and new energy vehicles and other equipment. When a safety problem occurs between a soft-packed polymer lithium battery and a steel-aluminum case lithium battery, the soft-packed polymer lithium-ion battery will generally blow up and crack, while the steel-aluminum case lithium battery may explode, so the soft-packed polymer lithium battery is more suitable for use. for safety. At the same time, the soft-pack polymer lithium battery is light in weight, highly variable in shape and has a longer cycle life. Therefore, the marke...

AI Technical Summary

Problems solved by technology

[0004] The traditional soft-packed polymer lithium battery tab production process uses a hot flat method to directly pressurize and heat the metal strip and the insulating sheet, and the insulating sheet at the contact part with the metal strip is fused to the metal strip. This process takes a long time to heat, and the high temperature heating mode The heat is directly transferred to the insulating sheet before it is transferred to the metal strip, so that the insulating sheet is in a molten state before it can be fused with the metal strip. This not only takes a long time to produce, but also easily destroys the molecular structure of the surface of the insulating sheet, resulting in subsequent tabs. The fusion of the insulating sheet and the aluminum-plastic film in the aluminum-plastic film package is unstable, resulting in sealing, lithium battery leakage, gas inflation and other quality hazards

Images