A methodology to model and validate electro-thermal-aging dynamics of electric vehicle battery packs

• DOI: 10.1016/j.est.2022.105538
• Publication Date: 2022-09-07T01:38:29Z
• Authors: Lisa Calearo; Andreas Thingvad; Charalampos Ziras; Mattia Marinelli
• Keywords: Battery pack; Electric-vehicle battery

It is becoming increasingly important for power system engineers to have accurate yet simple-to-realize models that simulate electric vehicle (EV) battery pack behaviour. This paper proposes a methodology model and validate the main dynamics – electrical, thermal aging characterize Li-ion batteries without disassembling them from vehicle. The consists of three steps. first implementation pack, considering mentioned their interdependencies. Next, electrical parameters are experimentally derived Nissan LEAF 40 kWh pack. Third, overall validated through real tests. Only ambient temperature provided as inputs, output compared with collected measurements Results show predicts electro-thermal behaviour errors below 5%. estimated capacity decrease deviates management (BMS) readings up one percentage point. We conclude our by discussing uncertainty regarding this estimation limitations introduced working EV packs, both on field validation.