How does the single-battery concept developed by PULS work?

If you want to provide a battery buffer for a 24 V system, you generally use two conventional 12 V batteries connected in series. The batteries must be paired and must have the same state of charge and ageing. If this is not the case, one battery may be overcharged or damaged or may age prematurely. The PULS single-battery concept simplifies this process and extends the useful life of the batteries.

PULS developed the single-battery concept to prevent damage from being caused. In an uninterruptible power supply (UPS) up to and including 10 A, only one 12 V battery is used. If buffering is required, a switching regulator converts the battery voltage into a constant output voltage (e.g. 22.5 V). In more powerful UPSs, two batteries connected in series are used. Each battery is charged separately and monitored to ensure that the problems described above cannot occur.

In practice, the single-battery concept typically extends the useful life of the batteries by 50%. It also means that paired batteries are not needed and reduces the potential risks.