High
technology often entails working under very precisely controlled environmental
conditions. Lithium or high energy batteries are a classic example
of a product where production is not possible in the absence of efficient
dehumidification.
Dehumidification, or moisture
control, has proven itself to be an important factor in the control
of the environment so as to produce higher quality products in greater
volume.
The need for dryness
Lithium is highly
hygroscopic by nature. Its affinity for water and its instability
in the presence of water makes the production of lithium batteries
impossible without efficient moisture control. Its reaction with
even small amounts of water vapour can reduce its shelf life and
performance.
Thus, very dry environment with strictly controlled moisture in
manufacturing and assembling area is a must for final quality and
longer life of Lithium Batteries.
The Solution
Desiccant dehumidification can maintain dewpoints
to very low levels, such .as -400F, consistently. However, the manufacturing
areas of the batteries house man and machines, and a suitable working
environment needs to be created for them.
Factors to Control in Lithium Battery Rooms
- Moisture Load Inside Controlled space
- Moisture level in Lithium Battery Processing
areas should correspond to less than (-) 28ºC dewpoint or
moisture content of 0.25 grams of water vapour per kg. of dry
air.
- Room Temperature should be at comfort levels
of around 25ºC and -28 to -35ºC dewpoint. (1-2 Gr/Lb/0.14
to 0.39 g/kg)
- Room temperature also needs to be kept slightly
warm, so that workers working in the processing area are comfortable.
- Air changes in the room should be 50 to 75 air
changes per hour with minimum fresh air introduced for positive
room pressurisation and ventilation for workers
Bry-Air specialises in designing and manufacturing
desiccant battery at less than (-) 28ºC dewpoint, or moisture content
of 0.25 grams of water vapour per kg of dry air. |
