Impact Tests and Computed Tomography Scans of Prismatic Battery Cells

Simon Schwolow (), Muhammad Ammad Raza Siddiqui, Philipp Bauer and Thomas Vietor
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Simon Schwolow: Research and Development, Volkswagen AG, VW-Straße 103, 38440 Wolfsburg, Germany
Muhammad Ammad Raza Siddiqui: Research and Development, Volkswagen AG, VW-Straße 103, 38440 Wolfsburg, Germany
Philipp Bauer: TUEV SUED Battery Testing GmbH, Daimlerstraße 15, 85748 München, Germany
Thomas Vietor: Institute for Engineering Design, Technische Universität Braunschweig, Hermann-Blenk-Straße 42, 38108 Braunschweig, Germany

Energies, 2022, vol. 15, issue 22, 1-20

Abstract: Recently, the use of prismatic cells in electric vehicles has increased significantly. Unlike the cylindrical or pouch format, the prismatic cell format has not been sufficiently investigated. In this study, quasi-static mechanical tests are performed on prismatic cells. The tests include a cylindrical and a hemispherical impactor that mechanically load the cells in all three spatial directions. In both in-plane directions, a cell stack consisting of three cells is tested to capture the influence and loading of the outer cells of a cell stack. It is found out that, in the in-plane tests, short-circuiting occurs first in the outer cells and subsequently in the middle cell, which is targeted by the impactor. This result can also be supported by computed tomography scans. The results illustrate that, when evaluating the crash safety of battery cells, several cells should always be tested in order to capture the different loading of the cells.

Keywords: prismatic cell; crush test; cell stack; cylindrical impactor; hemispherical impactor; computed tomography (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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