A Comparative Study of Lithium Ion to Lead Acid Batteries for use in UPS Applications

Ana-Irina Stan, Maciej Jozef Swierczynski, Daniel Ioan Stroe, Remus Teodorescu, Søren Juhl Andreasen, Klaus Moth

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

42 Citations (Scopus)


Uninterruptible power supply (UPS) systems have incorporated in their structure an electrochemical battery which allows for smooth power supply when a power failure occurs. In general, UPS systems are based on lead acid batteries; mainly a valve regulated lead acid (VRLA) battery. Recently, lithium ion batteries are getting more and more attention for their use in the back-up power systems and UPSs, because of their superior characteristics, which include increased safety and higher gravimetric and volumetric energy densities. This fact allows them to be smaller in size and weight less than VRLA batteries, which are currently used in UPS applications.
The main purpose of this paper is to analyze how Li-ion batteries can become a useful alternative to present VRLA. In this study, three different electrochemical battery technologies were investigated; two of the most appealing Li-ion chemistries, lithium iron phosphate (LFP) and lithium titanate oxide (LTO) were compared with lead acid batteries, in terms of their basics characteristics (e.g. capacity, internal resistance) and their dependence on the operating conditions.
Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE International Telecommunications Energy Conference (INTELEC)
Number of pages8
PublisherIEEE Press
Publication dateOct 2014
Publication statusPublished - Oct 2014
Event2014 IEEE International Telecommunications Energy Conference (INTELEC) - Vancouver, Canada
Duration: 28 Sept 20142 Oct 2014


Conference2014 IEEE International Telecommunications Energy Conference (INTELEC)
SeriesInternational Telecommunications Energy Conference. Proceedings


  • Lithium Ion battery
  • Lead acid battery
  • Uninterruptible Power Supply (UPS)


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