AGM stands for Absorbent Glass Mat. In the battery separator industry, AGM separator usually refers to a glass fiber separator used in VRLA lead-acid batteries.
It is placed between positive and negative plates to prevent direct contact while helping retain electrolyte inside the battery.
Definition
AGM separator is a glass fiber battery separator
AGM separator is designed for valve-regulated lead-acid battery structures where electrolyte is retained in a porous glass fiber mat. It works as both a physical separator and an electrolyte-retention material inside the battery.
Battery Function
It helps separate plates and retain electrolyte
Inside a VRLA lead-acid battery, the separator needs to keep positive and negative plates apart while supporting electrolyte distribution. A suitable separator is connected with assembly process, internal resistance and long-term battery performance.
Key Parameters
Thickness alone is not enough for selection
Buyers should also consider width, basis weight, acid absorption behavior, electrical resistance, porosity and mechanical strength. These parameters should match the battery design and production process.
Thickness
Connected with plate design, compression and assembly requirements.
Width or sheet size
Confirmed according to roll feeding, cutting or direct assembly needs.
Basis weight
Reviewed with separator structure and electrolyte-retention expectations.
Acid absorption
Discussed according to battery application and test requirements.
Electrical resistance
Confirmed with battery performance targets and test conditions.
Mechanical strength
Important for roll handling, cutting and assembly processes.
