While known for powering laptops and mobile phones, lithium-ion batteries are now changing the field of Uninterruptible Power Supply (UPS) systems for the better, says Nils Horstbrink, Director Offer Management Power at Vertiv.
This rechargeable battery addresses the drawbacks of the
traditional Valve-Regulated Lead Acid (VRLA) batteries commonly used for UPS
systems. While VRLAs are less expensive, these heavier batteries are larger,
and need more frequent replacement.
Let’s take a close look at the practical benefits of
using lithium-ion batteries for UPS.
More compact and lightweight
Lithium-ion batteries weigh 40% to 60% lighter and have a
40% smaller footprint than their VRLA counterparts. This translates into a
remarkable power density level, where less space is needed to deliver the same
amount of power.
Lithium-ion batteries have a significantly longer lifespan – around twice or thrice that of VRLA batteries on average. Compared to a traditional VRLA battery technology that typically lasts three to five years, lithium-ion technology can provide a battery service life of eight to 10 years (or longer), often outlasting the UPS itself. This essentially makes the UPS almost maintenance-free, with fewer or possibly no battery replacements throughout its lifespan. Unlike VRLA batteries, lithium-ion batteries offer a high life cycle, making it suitable for many applications where frequent charge and discharge cycles are expected.
Contributes to a lower total cost of ownership
Regarding the total cost of ownership (TCO), lithium-ion
batteries can provide up to 50% savings over their life expectancy. This is
primarily due to their longer lifespan, high-temperature resilience, reduced
maintenance expenses (with fewer or no battery replacement), and reduced
installation expenses. Although VRLA batteries can surely save you money upfront,
think of the bigger picture and consider the TCO.
Faster to recharge
UPS batteries need to be recharged as quickly as possible to
full capacity. While VRLA batteries can take over six hours to charge from 0%
to 90% of full runtime capacity, lithium-ion batteries take only around two
hours to recharge. That reduces the overall risk of experiencing an outage
before your UPS batteries have been fully charged.
The cutting-edge lithium-ion battery technology has gone a
long way to the advantage of many industries. With the many benefits it offers,
a lithium-ion powered UPS is a must-have to secure your critical operations and
lessen your operational costs.
Resilient to higher temperatures
Lithium-ion batteries can operate normally at temperatures
of up to 40oC without compromising performance. This is a clear
advantage of this battery technology over VRLA batteries, which shed off about
half their lifespan for every 10oC temperature rise over 25oC.
Since lithium-ion batteries have a wide operating
temperature range, they become convenient for more extreme, non-traditional
settings and facilities that don’t have enough cooling capabilities.
Comes with advanced integrated battery management system
Lithium-ion batteries come with an advanced integrated
battery management system (BMS). This provides an accurate picture of the
battery’s health and runtime and protects the battery cells against current,
temperature, and over- or under-charging. The BMS continuously adjusts battery
charging to make the most out of performance and battery life.