Method for extending the life of a lead-acid accumulator, in particular an accumulator (rechargeable battery) in a hazard warning system (danger alarm system)

摘要

The accumulator bridges the electrical power supply for the hazard warning system for a predetermined time in the event of a mains failure, the accumulator, which is generally buffered, being monitored for its operational readiness. According to the invention, the accumulator is not connected to maintenance charging but is discharged at a low current down to a predetermined voltage or capacity value at specific time intervals and is then recharged, the voltage or capacity value for the discharging being defined such that the charge capacity of the accumulator is ensured for the intended bridging time.