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Temperature gradient reduction in high-power battery systems using prismatic cells combined with Phase-Change Sheets and Graphite foils

Title data

Gepp, Markus ; Reisenweber, H. ; Lorentz, Vincent ; März, Martin:
Temperature gradient reduction in high-power battery systems using prismatic cells combined with Phase-Change Sheets and Graphite foils.
Event: IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society , Oct. 23–26, 2016 , Florence, Italy.
(Conference item: Conference , Speech with paper )

Official URL: Volltext

Project information

Project title:
Project's official title
Project's id
eDAS: Holistic Energy Management for third and fourth generation of EVs: eDAS = efficiency powered by smart Design meaningful Architecture connected Systems

Project financing: The research leading to these results has received funding from the European Union's Seventh Framework Program for research, technological development and demonstration under grant agreement no 608770 (“eDAS”). The authors acknowledge the Panasonic Device Solution Business Division for the supply of PGS, TSS and Graphite-Pad products and their technical support and collaboration.

Abstract in another language

In lithium-ion battery systems thermal management has an important influence on performance, safety and service life. Especially in automotive applications short-term peak loads thermally stress the battery cells. Temperature inhomogeneities arise, effecting ageing rates and electrical properties with the consequences of a reduced system lifetime and diverging state-of-charge of the battery cells. By integration of Phase-Change-Material together with high thermally conductive Pyrolytic Graphite Sheets and graphite gap filler pads, thermal peak shaving and temperature homogenization are implemented to reduce temporal and spatial temperature gradients. In this paper a battery module with prismatic cells and advanced thermal materials was investigated on test-bench. Measurements of temperature rise, differences and distribution at different boundary conditions were performed to evaluate the designed concept. The measured temperature profiles were captured in all three spatial directions within the battery module. As a result, without increasing the volumetric overhead, the maximum rise in temperature was reduced by 13%, while the additional Phase Change Material has 5% of the cells mass. Furthermore the temperature difference on module level was kept below 5K at all conditions above zero degrees ambient temperature even at the maximum specified discharge current and continuous cycling.

Further data

Item Type: Conference item (Speech with paper)
Refereed: Yes
Keywords: Prismatic Cell Battery System; Phase Change Material; Temperature Homogenization; Thermal Peak Shaving; Graphite Foils
Institutions of the University: Research Institutions > Research Centres > Bayerisches Zentrum für Batterietechnik - BayBatt
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 03 Jun 2022 10:31
Last Modified: 12 Oct 2022 13:37