A VRLA battery is a short form for “Valve-Regulated Lead-Acid” battery. It is also known as maintenance free or sealed battery. A VRLA battery manufacturer offers this battery for power applications, which conventionally dependent upon wet lead acid or vented cells. These include portable electrical equipment, off-grid power systems and other applications, which need affordable large-scale power storage.
Primarily, there are two kinds of VRLA batteries:
Both the above VRLA types have the same plates, container and pressure-relieving valves.
In an AGM VRLA battery, there is an electrolyte inside the glass mat and not flooding the plates freely. The very thin glass fibers are woven into the rug for maximizing the surface area to hold enough electrolytes to withstand throughout the life of the battery. The separator is not immersed entirely in the electrolyte. As a result, 2 to 10 per cent space will allow the occurrence of oxygen recombination.
The AGM with Deep Cycle Service (DCS) gives the most extended life for service that are deep and frequent. The battery has a positive face formula that enables it to sort out stress, which happens during the recurring charge-discharge cycle. The battery is combined with the grid alloy, which reduces the grid abrasion.
The AGM, which is regulated by the MR (Modular Range) valve, has absorbent separators. The separator is manufactured from a non-woven material that enables the plates to be entirely wet by the electrolytes. It also allows the oxygen produced to pass freely during charging.
The Gel Cell or Gel VRLA battery has a gelified electrolyte. That suggests that sulfuric acid is mixed with fumed silica. It minimizes the spilling, evaporation and corrosion issues that are common to wet-cell batteries. The battery is allowed by gel cell to sustain extreme temperatures, shock and vibration. The gel contains cracks in it for allowing oxygen to travel from positive to the negative plate – thus allowing the oxygen recombination cycle to occur.
The VRLA battery is also utilized in telecom and UPS applications through Lead Acid Batteries supplier. The battery allows necessary infrastructures to work during power outages situations.
Here are key attributes of both kinds of VRLA batteries: