Clean Room

A clean room is a space where the concentration of particles, microbes, and other contaminants is precisely regulated.

In the case of batteries there are a number of levels of cleanliness used depending on the material, component and manufacturing stage.

Clean rooms are classified according to the number and size of particles permitted per volume of air.

Clean rooms for battery manufacturing usually use the following classes of cleanness ISO 8, ISO7, and ISO6 per ISO 14644-1 standard or equivalent classes 100,000; 10,000; and 1,000 per FS209E standard. These classes belong to the middle class of cleanliness.

OperationISO ClassFederal Standard 209E
Electrode Coating5100
Cell Assembly5 or 6100 to 1,000
Module Assembly7 or 810,000 to 100,000
Pack Assembly7 or 810,000 to 100,000

References

  1. Clean Room atmosphere requirements for battery production, Afry
  2. ISO 14644-1:2015Cleanrooms and associated controlled environments. Part 1: Classification of air cleanliness by particle concentration, ISO
  3. FS209E and ISO Cleanroom Standards, Terra Universal