Rack Mounted Power for Modern Telecommunication Systems a "Sealed for Life" Lead Acid Battery

A new battery has been specially developed for providing standby power to telecommunications systems. It uses the principle of oxygen recombination, which eliminates gas evolution under normal operating conditions and allows the battery to be completely "Sealed for Life". The monobloc battery is available in flame retardant materials, and requires no maintenance other than surveillance of unit voltages. It is "office compatible" and can be installed within equipment racks without the normal precautions needed for removing gases and acid fumes. The battery can therefore complement the other parts of the Power Equipment Rack, improving flexibility for the user in adjusting his power requirements to his business needs. The new battery has been designed specifically to meet the requirements of the new Power Equipment Rack. It is contained on three shelves, each shelf carrying 8×6V sealed monobloc batteries giving a nominal voltage of 48V. The shelves of batteries are operated in parallel to give a total power on discharge of 6kW for 1 hour to an end voltage of 46V. This paper examines the battery specification and relate. s the conformance of the battery to the specified characteristics by reference to design features, test procedures and results. Electrical performance characteristics given in the paper include the constant power 6kW discharge for 1 hour, recharge characteristics at 2.27 volts per cell and the performance on continuous float. The specified requirement for Product Life is 10 years.