A Better Life with Batteries – How to Make a Battery Step.2 Cell Assembly: Pouch-Type Battery 1 (Lamination & Stacking)

The battery assembly process brings together electrodes, separators, and electrolytes. And it requires different manufacturing orders and techniques by the battery shape. Let’s start with how the pouch battery is assembled!

Technology for Layering Battery Materials

To insert battery materials into the electrode pockets of a pouch case, a Mono-Cell is first required. A Mono-Cell is the basic unit cell of a battery, consisting of an electrode and two separators, arranged in a stacked structure like separator-central electrode-separator-outer electrode.

The Lamination & Stacking method is applied to this mono-cell. First, lamination is performed to align and bond the cathode, anode, and separator. Then, through stacking, mono-cells are repeatedly layered. Next, by stacking half-cells, which consist of two separators and an anode, a stack-cell is formed, where the cathode and anode are alternately stacked with separators in between.

Technology for Maximizing Space Efficiency and Enhancing Energy Density

The Lamination & Stacking method is a technology that maximizes space efficiency inside the pouch case, thereby increasing energy density. The stacking method, which involves layering battery cells one by one, requires a high level of technical expertise. By utilizing Lamination & Stacking, cell misalignment is minimized, and there are no empty spaces within the battery cell, resulting in improved energy performance. Thanks to this method, LG Energy Solution produces a wide range of pouch-type batteries, from ultra-slim batteries less than 2mm thick to long cells.

We’ve explored the Lamination & Stacking method in the assembly of pouch-type batteries. Next time, we’ll delve into how the packaging process is carried out!

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