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  4. Effect of a flexible battery module bracing on cell aging
 
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2017
Conference Paper
Title

Effect of a flexible battery module bracing on cell aging

Abstract
Lithium-ion battery cells consist either of a stacked or a wound configuration of a separator between two coated electrodes. The expansion of the graphite anode due to lithium intercalation, when charging, leads to a macroscopic expansion of the cell. State of the art rigid battery module bracing causes a periodic pressure build-up over a full charge/discharge cycle and therefore a compression of the battery separator. Furthermore, this results in a reduced diffusivity of the lithium-ions, which can cause lithium plating. Lithium plating is considered as the main cause of (premature) battery aging. In our paper, we present for the first time the investigation of a flexible spring-loaded cell bracing on cell aging by maintaining a nearly constant pressure. In comparison with the rigid bracing, a different aging speed can be observed in favour of the flexible bracing method.
Author(s)
Ebert, Fabian
Fraunhofer-Institut für Silicatforschung ISC  
Sextl, Gerhard  
Fraunhofer-Institut für Silicatforschung ISC  
Lienkamp, Markus
Mainwork
Twelfth International Conference on Ecological Vehicles and Renewable Energies, EVER 2017  
Conference
International Conference on Ecological Vehicles and Renewable Energies (EVER) 2017  
DOI
10.1109/EVER.2017.7935871
Language
English
Fraunhofer-Institut für Silicatforschung ISC  
Keyword(s)
  • Batterie

  • Lithium-Ionen-Batterien

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