Valve Regulated Lead Acid (VRLA) Batteries Advantage:

What is Batteries-

A container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.

Types of Batteries:-

Nickel Cadmium (NiCd) — mature and well understood but relatively low in energy density. The NiCd is used where long life, high discharge rate and economical price are important. Main applications are two-way radios, biomedical equipment, professional video cameras and power tools. The NiCd contains toxic metals and is environmentally unfriendly.

Nickel-Metal Hydride (NiMH) — has a higher energy density compared to the NiCd at the expense of reduced cycle life. NiMH contains no toxic metals. Applications include mobile phones and laptop computers.

Lead Acid — most economical for larger power applications where weight is of little concern. The lead acid battery is the preferred choice for hospital equipment, wheelchairs, emergency lighting and UPS systems.

Lithium Ion (Li‑ion) — fastest growing battery system. Li‑ion is used where high-energy density and lightweight is of prime importance. The technology is fragile and a protection circuit is required to assure safety. Applications include notebook computers and cellular phones.

Lithium Ion Polymer (Li‑ion polymer) — offers the attributes of the Li-ion in ultra-slim geometry and simplified packaging. Main applications are mobile phones.

Valve Regulated Lead Acid (VRLA) Batteries are popularly termed as maintenance free lead acid batteries. Each cell in VRLA battery will have a value (automating operating) to allow the gas to escape if developed by the over charging the cells and to hinder the entrance of oxygen from the air into the cell

These VRLA batteries are also called sealed lead acid batteries and also recombinant batteries. Oxygen which evolve during discharging at the positive plate of the battery recombine with the hydrogen which  evolve at the negative plate of the cell to from water. This results in prevention of the water loss and unlike flooded batteries water is not needed to be added periodically. The valve present in VRLA cell acts as a safety valve which opens when the concentration of hydrogen gas inside the battery increases dangerously high. Some of the advantages of VRLA cell is listed below:

Advantages:

• VRLA battery is maintenance free and no periodic water refilling is not required
• Reduced demand on ventilation
• The capacity range of VRLA battery is high (12000 Ah)
• VRLA batteries will have longer life. Life span of this batteries will be around 10 years
• Feasibility for float charge operation with the same voltage of the cells, to continue in using existing charging equipment
• VRLA batteries are economical