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Article

From Cell to Battery System in BEVs: Analysis of System Packing Efficiency and Cell Types

1
Chair for Production Engineering of E-Mobility Components, RWTH Aachen University, 52064 Aachen, Germany
2
Fraunhofer IPT, 48149 Münster, Germany
3
Faculty of Mechanical Engineering, RWTH Aachen University, 52072 Aachen, Germany
*
Author to whom correspondence should be addressed.
World Electr. Veh. J. 2020, 11(4), 77; https://doi.org/10.3390/wevj11040077
Received: 7 November 2020 / Revised: 28 November 2020 / Accepted: 4 December 2020 / Published: 10 December 2020
The motivation of this paper is to identify possible directions for future developments in the battery system structure for BEVs to help choosing the right cell for a system. A standard battery system that powers electrified vehicles is composed of many individual battery cells, modules and forms a system. Each of these levels have a natural tendency to have a decreased energy density and specific energy compared to their predecessor. This however, is an important factor for the size of the battery system and ultimately, cost and range of the electric vehicle. This study investigated the trends of 25 commercially available BEVs of the years 2010 to 2019 regarding their change in energy density and specific energy of from cell to module to system. Systems are improving. However, specific energy is improving more than energy density. More room for improvements is thus to be gained in packaging optimization and could be a next step for further battery system development. Other aspects looked at are cell types and sizes. There, a trend to larger and prismatic cells could be identified. View Full-Text
Keywords: electric vehicle battery; energy density; specific energy; packing efficiency; system design; cell type; BEV; battery engineering electric vehicle battery; energy density; specific energy; packing efficiency; system design; cell type; BEV; battery engineering
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MDPI and ACS Style

Löbberding, H.; Wessel, S.; Offermanns, C.; Kehrer, M.; Rother, J.; Heimes, H.; Kampker, A. From Cell to Battery System in BEVs: Analysis of System Packing Efficiency and Cell Types. World Electr. Veh. J. 2020, 11, 77. https://doi.org/10.3390/wevj11040077

AMA Style

Löbberding H, Wessel S, Offermanns C, Kehrer M, Rother J, Heimes H, Kampker A. From Cell to Battery System in BEVs: Analysis of System Packing Efficiency and Cell Types. World Electric Vehicle Journal. 2020; 11(4):77. https://doi.org/10.3390/wevj11040077

Chicago/Turabian Style

Löbberding, Hendrik, Saskia Wessel, Christian Offermanns, Mario Kehrer, Johannes Rother, Heiner Heimes, and Achim Kampker. 2020. "From Cell to Battery System in BEVs: Analysis of System Packing Efficiency and Cell Types" World Electric Vehicle Journal 11, no. 4: 77. https://doi.org/10.3390/wevj11040077

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