Decoding range variability in electric vehicles: Unravelling the influence of cell-to-cell parameter variation and pack configuration

Sourabh Singh, Sarbani Mandal, Sai Krishna Mulpuri, Bikash Sah, Praveen Kumar

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This study addresses the common occurrence of cell-to-cell variations arising from manufacturing tolerances and their implications during battery production. The focus is on assessing the impact of these inherent differences in cells and exploring diverse cell and module connection methods on battery pack performance and their subsequent influence on the driving range of electric vehicles (EVs). The analysis spans three battery pack sizes, encompassing various constant discharge rates and nine distinct drive cycles representative of driving behaviours across different regions of India. Two interconnection topologies, categorised as “string” and “cross”, are examined. The findings reveal that cross-connected packs exhibit reduced energy output compared to string-connected configurations, which is reflected in the driving range outcomes observed during drive cycle simulations. Additionally, the study investigates the effects of standard deviation in cell parameters, concluding that an increased standard deviation (SD) leads to decreased energy output from the packs. Notably, string-connected packs demonstrate superior performance in terms of extractable energy under such conditions.

Original languageEnglish
Article number100329
JournaleTransportation
Volume20
DOIs
StatePublished - May 2024
Externally publishedYes

Keywords

  • Battery pack configurations
  • Cell-to-cell parameter variations
  • Electric vehicles
  • Range variability

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