leochbattery

The attributes of higher density and equipment compatibility have the valve regulated lead acid battery (VRLA battery) emerging as the technology of choice for standby applications in telecommunications. There is now a general trend away from the concentration of power plant in the controlled environments of central office towards a much great geographical decentralization of power and back-up batteries. However, decentralized power plant is often installed in less controlled operating environments and the thermal behavior of VRLA batteries used for backup power purposes under varied ambient conditions is of concern. Telstra operates battery-backed power plant in varied climatic conditions throughout Australia. It is therefore important to understand the service-life implications of VRLA batteries in uncontrolled environments and the subsequent risks to Telstra network.

The thermal behavior of VRLA batteries has received considerable attention in the context of both service-life and thermal runaway. Thermal runaway of VRLA batteries describes the condition where the rate of heat generation within the battery exceeds its heat dissipation capacity, and is often linked to charging abuse or high ambient operating temperatures. For batteries on float service, thermal runaway is characterized by a cooperative increase in both charging (float) current and internal battery temperature over time which may lead to catastrophic and destructive failure. Evolution of hydrogen sulfide ahs also been reported during thermal runaway events. System conditions believed to be conducive to thermal runaway have been described and many thermal management strategies have been advocated. The physical geometry and internal design of the VRLA battery and the design of the battery installations contribute to the susceptibility of thermal runaway. Current-limited float charging or temperature compensation of the float voltage is often proposed as important in alleviating the risk of thermal runaway. However, either technique may not be easily applied in existing standby installations.

Thermal runaway may be difficult to predict and the causative agents often difficult to determine. It is therefore of interest to understand the conditions within an VRLA cell or battery which might exist prior to an thermal runaway episode. However, information about the thermal conditions and temperature distributions inside monoblock designs during both normal and abnormal operating conditions is limited. High resolution measurement of the internal temperature gradients and float parameters has been used to characterize battery system conditions prior to thermal runaway.

If you want to know more about VRLA battery, you can just visit Leoch International, which is an excellent manufacturer of lead acid battery. The company is a public company which has over 10 year’s history and it is very reliable and dependable. If you are interested in the company, you can search for more information in the internet. The office website is http://www.leoch.com.