Effects of Cell and Module Configuration on Battery System in Electric Vehicles

Year 2018, Volume: 4 Issue: 4, 143 - 152, 19.02.2019

Mahmut Kerem Eren Eymen İpek Kadir Aras Turgay Gücükoğlu Koray Erhan

Abstract

Battery pack is one of the most important powertrain
components in Electric Vehicles (EV). The performance of battery pack directly
affects vehicle’s range and performance. Configuration of cells and modules
inside battery pack also plays an important role on battery performance and
safety. In this study, the work deals with an electric vehicle that has 400 V
DC bus voltage and 78 kWh total energy content. When the vehicle’s battery is
designed, the criteria to be focused on are evaluated for three different
configurations of given cell quantity. Thus, optimum design solution can be
achieved. According to calculations, cost analysis, total electrical power loss
and most efficient solution scenarios (alternatives) are determined for these
three different configurations afterwards system complexity is optimized. In
the first configuration, 8 series modules are selected which have 12s6p cell
configuration. In the second configuration, there are 16 modules with 8s2p
module combination. Each module is equipped with 12s3p cell configuration. Last
configuration has 16 modules in series where each module has 6s6p cell
configuration. Advantages and disadvantages of the systems are
revealed as a result of the calculations made for each configuration.

Keywords

Battery electric vehicle, battery pack, battery module, battery cell

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