DST are the market leaders in the design and supply of ultra low humidity air systems for battery manufacturing clean rooms.
A dry air supply at 0.05%RH at 20°C (-60°Cdp) can be achieved using our standard D-Max silica gel rotor.
The processes used for manufacturing Lithium ion batteries are very similar to those used in the production of Nickel Cadmium cells and Nickel Metal Hydride cells. The anodes and cathodes in Lithium cells are of similar form and are made by a similar process. There are however some key differences associated with the higher reactivity of the chemicals used in the Lithium cells.
The electrolyte filling and sealing stage of cell manufacture must be carried out in a “dry room” since the electrolyte is highly reactive with moisture. Moisture causes the electrolyte to decompose with the emission of toxic gases.
One of the most commonly used electrolyte materials, Lithium Hexafluoride, forms toxic hydrofluoric acid (HF), Lithium Hydroxide and Hydrogen Gas when exposed to moisture.
Crucially moisture sealed inside the battery can continue to react after the battery is completed, significantly reduces its lifespan.