A production process of lithium-ion battery tabs with high sealing and anti-leakage

Abstract

The invention discloses a production process of lithium-ion battery tabs with high sealing and anti-leakage. In the production process, the base metal material is subjected to bright rolling and dull rolling through steps A-H, and then electrochemically polished and polished. passivation, cleaning and drying it, and then cut the strip-shaped metal conductor into sections, ultrasonic cleaning and drying it, and treating it with deionized water and drying it, and finally strip The polymer insulating film is pasted on the segmented metal conductor. The lithium-ion battery tab produced by this process increases the surface roughness of the metal conductor, which increases the effective contact area between the metal conductor and the polymer insulating film, so it can effectively improve the adhesion and make the two bonds more stable, thereby Improve the sealing performance of the battery cell and improve the welding performance of the metal conductor. At the same time, it reduces the surface activity of the metal conductor and enhances its ability to resist electrolyte erosion, thereby further improving the sealing performance of the battery cell and preventing lithium-ion batteries from leaking.

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