Archives

Direct leak testing of filled lithium-ion cells for the 3C market

Lithium-ion cells can be differentiated according to the shape of their housing. On the one hand there are cells with rigid, stable housings. These include round and button cells. The other category is made up of cells with a soft, bag-like exterior: pouch cells. All these cell types have two damage mechanisms in common: If electrolyte escapes from the cell, its capacity is reduced – the battery life is shortened. And when moisture from the air enters the cell, the electrolyte can react with water to form hydrofluoric acid - leading to further leaks in the cell's case and further reducing its lifespan.