TY - JOUR
T1 - Decoding range variability in electric vehicles
T2 - Unravelling the influence of cell-to-cell parameter variation and pack configuration
AU - Singh, Sourabh
AU - Mandal, Sarbani
AU - Mulpuri, Sai Krishna
AU - Sah, Bikash
AU - Kumar, Praveen
N1 - Publisher Copyright:
© 2024 The Authors
PY - 2024/5
Y1 - 2024/5
N2 - 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.
AB - 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.
KW - Battery pack configurations
KW - Cell-to-cell parameter variations
KW - Electric vehicles
KW - Range variability
UR - http://www.scopus.com/inward/record.url?scp=85189936024&partnerID=8YFLogxK
U2 - 10.1016/j.etran.2024.100329
DO - 10.1016/j.etran.2024.100329
M3 - Article
AN - SCOPUS:85189936024
SN - 2590-1168
VL - 20
JO - eTransportation
JF - eTransportation
M1 - 100329
ER -