Electric Vehicle Battery Manufacturing Process

Electrode Process

The active materials are mixed by combining the processed metal oxides with a conductive additive and a binder.

This mixture is called a slurry which is then coated onto metal foil sheets, typically aluminum or copper.

To press the coated electrode materials. Pressing removes excess solvents and improves the density, adhesion.

The machine uses sharp blades or rotary cutters to slice the sheet into narrower strips or ribbons of the desired width.

Notching

Notching refers to the process where reel of electrode is cut into individual sheets with designated dimensions.
Vacuum Drying

Vacuum drying removes moisture from sheets of electrodes to ensure low moisture content in assembled battery cells.
Stacking

The cathode and anode foils are stacked together with a separator material in between to create a jelly roll-like structure.
Tab Welding

Tab welding connects a set electrode foils to tab.
Packaging

The purpose of packaging is to place Jelly roll into formed pouch, fill with electrolyte and seal.
Electrolyte Injection

To help the lithium ions shuttle between the cathode and anode.

Soaking/Pre-Charging

It is the initial charging process performed on a newly assembled battery cell.
Degassing

It is a critical step that helps remove any excess or violate gases that may have accumulated within the battery cells.
Aging

It is a controlled procedures where the battery cells are subjected to specific conditions to simulate their performance over time.
Inspection

In inspection that battery cells undergo final testing to ensure they meet the required performance and quality standards