• Battery separator is used as a porous piece of fabric which is positioned between the positive and negative electrodes in a
  1. Liquid electrolyte,
  2. A gel electrolyte or
  3. A molten salt battery.
• The main function of this separator is to put a stop to physical contact of the positive and negative electrodes while helping as an electrolyte basin to permit free ionic transport.
• This separator can be classified into two part according to its structure such as
  1. Micro porous and
  2. Non-woven.
• An ideal battery separator should have the properties of
  1. High porosity,
  2. Small mean pore diameter,
  3. Oxidation resistance,
  4. Puncture resistance,
  5. Thermal dimensional stability and
  6. Freedom from harmful chemical contaminants,
  7. Favorable voltage characteristics,
  8. Retardation of antimony transfer,
  9. Electrochemical compatibility and
  10. Prevention of dendrite growth.

Raw Material:

• The main raw materials used for the above process are PVC, PE, glass mats normally of wool.

Technology:

• The absorbent glass mats (AGM) are manufactured by
• Dry-laid process,
• Wet-laid process,
• Spun-bond process or
• Melt-blown process
• All these processes consist of three steps:
• Making fabric webs,
• Bonding webs and
• Post-treatment
• Normally in major machine manufacturer designs their machine where web making & web bonding took place simultaneously.

Application

• Industrial batteries
• Automotive batteries

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