Even small amounts of moisture in the air can compromise the quality of the finished battery. The generally accepted dew point for lithium battery production is -40°C (< 1% relative humidity), although this may drop further due to new battery chemistries which may be more moisture sensitive.
The lower the dew point, the lower the water vapour content in the air. Even small amounts of moisture in the air can compromise the quality of the finished battery.
Munters pioneered desiccant dehumidifier technology, and our innovative solutions are used in lithium-ion battery production facilities worldwide – helping to maintain optimal climate conditions with long-lasting performance, all the while saving energy.
The optimal way to achieve the best dry room is through desiccant rotor dehumidification. Desiccant rotors use heated reactivation air to continuously regenerate the rotor after moisture is adsorbed from the process air.
Once regenerated, the desiccant wheel rotates back to the process area for further moisture adsorption. But, to achieve low dew points, the system should add a purge section to capture any residual moisture in the wheel and to recover heat to improve the systems’ energy efficiency.
As countries look to reduce or ban vehicle-related emissions, some as early as 2030, battery manufacturers need to increase capacity and capability when it comes to producing lithium-ion batteries for electric vehicles.