Winding Vs Stacking, Which Works Best For Lithium-Ion ...

These two technologies set up are always related to the below key technical points: Battery cell space utilization, battery cell cycle life, cell manufacturing efficiency and manufacturing investment.

Overview

1. What is Winding Technology?

2. What is Stacking Technology?

3. What technology was used in the lithium-ion battery cell you saw on the market?

4. What are the benefits of lithium-ion battery cell that formed by stacking process?

5. What is the development direction of cylindrical cell, prismatic cell and pouch cell from current scene?

6. How do you comment on these two technical routes if by manufacturing efficiency and yield efficiency?

1. What is Winding Technology?

After slitting the cathode roll, separator and anode roll, the winding process is to winding them by a fixed winding needle in sequence and extruding them into a cylindrical or square shape, then placing them inside a square or cylindrical metal shell. The size of the slitted rolls, the number of coils and other parameters are determined according to the design capacity of the battery cell.

2. What is Stacking Technology?

The stacking process is to cut the cathode and anode sheets into the required size, then stack the cathode sheets, separator and anode sheets into small cell unit, and then stack the small cell unit to form the final single cell.

3. What technology was used in the lithium-ion battery cell you saw on the market?

Pouch cell: Two technology are both adopted, it depends on the cell manufacturer.
Blade cell: Designed and produced by stacking process.
Prismatic cell: Both stacking and winding processes can be used. At present, the main technology direction in China is mainly winding and is transiting to stacking.
Cylindrical cell: As a mature product, it always with the winding process.

4. What are the benefits of lithium-ion battery cell that formed by stacking process?

The stacking process offers higher energy density and better mechanical stability. This makes them more suitable for applications that require longer battery life and higher efficiency. For more details on how stacking technology benefits lithium-ion batteries, View Details.