SEALED MANTENANCE FREE (SMF) BATTERY

Full form of SMF battery – The full form of SMF is Sealed Maintenance Free battery.

What is SMF battery – Definition of SMF battery is given below –

A maintenance-free vehicle battery is one that is not designed to be opened or refilled. It needs charging when battery is discharged or on load. It doesn’t use liquid electrolyte rather a gel type of electrolyte is used in it. As no refilling of water or check specific gravity on regular basis, these batteries are called maintenance free batteries.

Comparison between Lead Acid & Maintenance Free batteries

Lead Acid Battery	Maintenance Free Battery
A liquid form electrolyte is used.	It uses a specialized system, such as a glass mat or gel, to absorb and immobilize the electrolyte,
The liquid electrolyte evaporates, if electrolyte level goes below a certain point it makes battery inoperable.	No evaporation of electrolyte takes place in it.
Refilling is done with distilled water when level of electrolyte goes down due to evaporation.	No refilling is done as no evaporation takes place.
Hydrogen gas is produce during the operation.	No hydrogen gas is produced.
When a conventional battery begins to lose its charge, adding distilled water may revitalize the battery by recovering the plates with electrolyte solution.	When a maintenance-free battery loses its ability to hold a charge, it must be replaced.

Valve Regulated Lead Acid (VRLA) Batteries

Full form VRLA Battery – Valve Regulated Lead Acid Battery.

What is VRLA battery – Definition of VRLA battery is given below –

VRLA Batteries are called Sealed Lead Acid (SLA) batteries. Construction of such batteries is designed to prevent electrolyte loss through evaporation, spillage and gassing which helps to increase the life of the battery and eases maintenance. In other words we can say that no regular additional water is required during operation. In such batteries instead of simple vent caps on the cells to escape the gas, VRLA have pressure valves that open only under extreme conditions.

VRLA batteries are also designed to ensure that oxygen & hydrogen are not generated during operation. This usually involves a catalyst that causes the hydrogen and oxygen to recombine into water. As there is no spillage of the acid electrolyte these batteries are safer than the conventional lead acid batteries. VRLA batteries can be mounted in any orientation.

VRLA batteries are classified into two categories–

Gel Cell,

AGM (Absorbed Glass Mat)

Gel Cell VRLA batteries –

Gel cell add silica dust to the electrolyte which forms a thick gel. Sometimes it is also known as Silicone batteries.

AGM VRLA batteries –

AGM is used in VRLA batteries, the Boron Silicate fiberglass mat acts as the separator between the electrodes and absorbs the free electrolyte which acts like a sponge. In this process, hydrogen and oxygen are recombined which are generated during the charging process. No silica gel is necessary.

Hence, in this way the acid is more readily available to the plates allowing faster reactions between the acid and the plate material allowing higher charge/discharge rates as well as deep cycling. Special features of AGM batteries –

Due to robust construction, it is able to withstand vibration & shock,

The cells will not leak in case of case is cracked because the glass mat is only 92-95% saturated with Sulfuric acid and there is no excess liquid,

It has a very low self-discharge rate of from 1% to 3% per month.

SELECTION OF BATTERIES –

Following point should consider during selection of a battery –

Voltage – voltage of each battery, ex – 12V or 24V or 48V,

Ampere-Hour (AH) – AH capacity such as 100AH or 200AH, 180AH etc,

Type of battery – Lead acid type (tubular) or Sealed Maintenance Free (SMF),

Size of battery – Check the size/dimension of battery according to the requirement.

Warranty – ask for maximum years for warranty of battery,

SEALED MANTENANCE FREE (SMF) BATTERY

Full form of SMF battery – The full form of SMF is Sealed Maintenance Free battery.

What is SMF battery – Definition of SMF battery is given below –

Comparison between Lead Acid & Maintenance Free batteries

Valve Regulated Lead Acid (VRLA) Batteries

Full form VRLA Battery – Valve Regulated Lead Acid Battery.

What is VRLA battery – Definition of VRLA battery is given below –

VRLA batteries are classified into two categories–

Gel Cell VRLA batteries –

AGM VRLA batteries –

SELECTION OF BATTERIES –

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Sealed Maintenance Free (SMF) Battery

SEALED MANTENANCE FREE (SMF) BATTERY

Full form of SMF battery – The full form of SMF is Sealed Maintenance Free battery.

What is SMF battery – Definition of SMF battery is given below –

Comparison between Lead Acid & Maintenance Free batteries

Valve Regulated Lead Acid (VRLA) Batteries

Full form VRLA Battery – Valve Regulated Lead Acid Battery.

What is VRLA battery – Definition of VRLA battery is given below –

VRLA batteries are classified into two categories–

Gel Cell VRLA batteries –

AGM VRLA batteries –

SELECTION OF BATTERIES –

Search Anything

Contact Us

Courtesy

Study Material Web Portal