Popularity of VRLA battery is on the rise

VRLA battery depends on security valve controls venting which is one-way venting, which don’t need any maintenance in use. For the recent years, because of its small volume, light weight, good sealing, no leakage, no pollution, good high rate discharges, maintenance free, and so on features, VRLA batteries are widely used by many professional department of electric power system.

The charge voltage setting on VRLA is generally lower than SLA. Heat is a killer of VRLA. Many stationary batteries are kept in shelters with no air conditioning. Every 8°C (15°F) rise in temperature cuts the battery life in half. A VRLA battery, which would last for 10 years at 25°C (77°F), will only be good for 5 years if operated at 33°C (95°F). Once damaged by heat, no remedy exists to improve capacity.

The cell voltages of a VRLA battery must be harmonized as close as possible. Applying an equalizing charge every 6 months brings all cells to similar voltage levels. This is done by increasing the cell voltage to 2.50V/cell for about 2 hours. During the service, the battery must be kept cool and careful observation is needed. Limit cell venting. Most VRLA vent at 0.3 Bar (5 psi). Not only does escaping hydrogen deplete the electrolyte, it is highly flammable.

Water permeation, or loss of electrolyte, is a concern with sealed lead acid batteries. Adding water may help to restore capacity but a long-term fix is uncertain. The battery becomes unreliable and requires high maintenance.

Here are some common features of VRLA battery as following.

1. High rate sealing: electrolyte like Gel is absorbed in the high porosity isolated plate, which is not able to flow, so it can be placed in upright.

2. No antimony lead alloy plate, less self-discharging.

3. Positive and negative plate is fully covered by the isolated plate, and effective materials are not able to fall off, and it has longer life span.

4. The volume of VRLA battery is smaller than the old-fashioned one, but its capacity is much higher.

5. No electrolyte is required in the transport way, meanwhile, it doesn’t produce acid mist, gas, with less maintenance when using.

6. Less internal resistance, good self-discharging with high current.

VRLA batteries don’t pollute the equipment and environment, which can be used along with electrical devices, so you don’t need a special room to place and maintain it, meaning less maintenance. Besides, you can use the folded battery rack to install it, which occupies a little space to save the investment cost of power source system.

In a word, VRLA batteries’ features create super advantage condition for telecommunication, electrical power, information, finance and so on modern science management. Because water filling and proportion testing is no required, and it only needs to inspect the change of voltage and capacity of charging and discharging. And it is able to realize the microprocessor control with no person watching. VRLA batteries are widely used in telecommunication, electrical power system, emergency lighting, automation control system, fire and security alarm system, solar energy, wind energy system, computer backup power source, portable instruments, medical system equipment, electrical power vehicles, electrical tools and so on.

If you want to know more about VRLA battery, you can visit LEOCH International, which is a professional battery manufacturer of lead acid battery. The site is http://www.leoch.com