Production technology of pole lug of lithium ion battery with high sealing property and electrolyte leakage preventing effect

Abstract

The invention discloses a production technology of a pole lug of a lithium ion battery with high sealing property and electrolyte leakage preventing effect. The production technology comprises the following steps A to H: performing bright rolling and matt rolling on substrate metal material, and electrochemical polishing and passivating; cleaning and drying; cutting the rolled strip-shaped metal conductor into segments; cleaning by ultrasonic waves, and drying; using deionized water to treat, and drying; finally, adhering a strip-shaped macromolecular insulation film onto the section shape metal conductor. The pole lug of the lithium ion battery produced by the production technology has the advantages that because the surface roughness of the metal conductor is increased, the effective contact area between the metal conductor and the macromolecular insulation film is increased, the adhesion force is effectively increased, the metal conductor and the macromolecular insulation film can be more stably adhered, the sealing property of a battery cell is improved, and the welding property of the metal conductor is improved; the surface activity of the metal conductor is reduced, the electrolyte erosion-resistant ability is enhanced, the sealing property of the battery cell is further improved, and the electrolyte leakage of the lithium ion battery is prevented.

Description

technical field [0001] The invention relates to a production process of a lithium ion battery tab, in particular to a production process of a lithium ion battery tab with high sealing and anti-leakage. Background technique [0002] Lithium-based batteries can be divided into lithium batteries and lithium-ion batteries. Among them, lithium-ion batteries are a kind of secondary batteries (rechargeable batteries), which mainly rely on lithium ions to move between the positive and negative electrodes to work; during charging and discharging, Li + intercalation and deintercalation back and forth between the two electrodes; when charging, the Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Nowadays, electrical components such as mobile phones and laptops use lithium-ion batteries, commonly known as lithium batteries. B...

AI Technical Summary

Problems solved by technology

And if the lithium-ion battery is not well sealed, the electrolyte may leak, which will lead to the failure of the battery cell, that is, the battery is scrapped.

In the complete sealing body of aluminum-plastic film packaging bag, other parts are welded by the same non-metallic material, and the welding effect is like a whole. Only the tabs are bonded between metal and non-metal, and the bonding effect is far less than The same material, therefore, the seal of the tab part is the weakest, and once the sealing and bonding interface fails, it will cause the lithium-ion battery to leak and the entire lithium-ion battery will fail, and even fire and other related safety accidents will occur. endanger the safety of users