• • • UPS & STANDBY POWER • • •
DC-UPS Modules – battery or capacitor storage? Making the correct decision
Maximilian Koehler, PULS product manager for DC-UPS modules, says if manufacturing processes are disrupted due to power interruptions, high costs can be incurred
n uninterruptible power supply is essential in certain industries: If manufacturing processes are disrupted due to power interruptions, high costs can be incurred. There is also a risk of data loss and damaged systems. DC-UPS modules reduce this risk by bridging power outages or load fluctuations with the help of batteries or electrochemical double layer capacitors. However, which applications require which type of UPS depends on numerous factors. There are currently two options for continuing to supply power to a load in an emergency: both
A 16 ELECTRICAL ENGINEERING • MARCH 2023
electrochemical double-layer capacitors and lead-acid batteries can serve as energy storage in DC-UPS systems for industrial plants. Electrochemical double-layer capacitors, also known by trade names such as Ultracap, Supercap or Greencap, have been available on the market for over 25 years and have become reliable and well- tested components. Initially quite expensive, these components are suitable as energy storage devices for DC-UPS units and can be used for applications such as storing braking energy or providing short peak currents.
Traditional lead-acid batteries have gained a strong competitor in the form of electrochemical double-layer capacitors. However, both UPS types have their benefits depending on the application. These are explained in the following comparison:
When comparing energy
densities, batteries always win Comparing the hold-up times of capacitor- supported and battery-supported systems is not useful. Batteries always win when comparing
electricalengineeringmagazine.co.uk
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