Large-Capacity and Long-Life Sealed Lead-Acid Batteries for Telecommunications Systems

Lead-acid batteries used in telecommunications systems as a standby power sources play an important role in providing power in the event of commercial power failures. However, these batteries require numerous inspections and a great deal of manpower to maintain them. Therefore, reduction of labor involved in those maintenance has been requested. Sealed lead-acid batteries with a large capacity and a long life have been developed for telecommunications applications. They are safe and easily maintained. They have a maximum capacity of 3,000 Ah and are designed to have a life of over 10 years. Parameters such as plate thickness and electrolyte specific gravity were determined to attain the specified performance and life. Adhesives and rubber valves are made of reliable materials. Flame-retardant resin is applied to the battery container. Performance tests in laboratory and in telephone offices have confirmed that the sealed lead-acid batteries exhibit satisfactory characteristics and are sufficiently suited to telecommunications applications.