Soh-Aware active cell balancing strategy for high power battery packs

Alma Probstl, Sangyoung Park, Swaminat Narayanaswamy, Sebastian Steinhorst, Samarjit Chakraborty

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

22 Scopus citations

Abstract

Short drive range due to limited battery capacity and high battery depreciation costs persist to be the main deterrents to the wide adoption of Electric Vehicles (EVs). High power battery packs consisting of a large number of battery cells require extensive management, such as State of Charge (SOC) balancing and thermal management, in order to keep the operating conditions within a safe and efficient range. In this paper, we propose a novel State of Health (SOH)-Aware active cell balancing technique, which is capable of extending the cycle life of the whole battery pack. In contrast to the state-of-The-Art active cell balancing techniques, the proposed technique reduces the load current of cells with low SOH using the active cell balancing architecture. Based on the observation that assigning the smallest possible load current to cells with lower SOH extends cycle life, the technique identifies the most beneficial charge transfers. We find that with our proposed scheme, aging could be mitigated by up to 23.5% over passive cell balancing and 17.6% over active SOC cell balancing.

Original languageEnglish
Title of host publicationProceedings of the 2018 Design, Automation and Test in Europe Conference and Exhibition, DATE 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages431-436
Number of pages6
ISBN (Electronic)9783981926316
DOIs
StatePublished - 19 Apr 2018
Event2018 Design, Automation and Test in Europe Conference and Exhibition, DATE 2018 - Dresden, Germany
Duration: 19 Mar 201823 Mar 2018

Publication series

NameProceedings of the 2018 Design, Automation and Test in Europe Conference and Exhibition, DATE 2018
Volume2018-January

Conference

Conference2018 Design, Automation and Test in Europe Conference and Exhibition, DATE 2018
Country/TerritoryGermany
CityDresden
Period19/03/1823/03/18

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