TY  - JOUR
AU  - Faber, Matthias
AU  - Buitkamp, Oliver
AU  - Ritz, Simon
AU  - Börner, Martin
AU  - Berger, Jonathan
AU  - Friedrich, Julian
AU  - Arzberger, Arno
AU  - Sauer, Dirk Uwe
TI  - A method to determine the specific heat capacity of lithium-ion battery cells using thermal insulation
JO  - Journal of power sources
VL  - 583
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2024-02550
SP  - 233499 -
PY  - 2023
N1  - Unterstützt durch BMBF Projekt: SimBAS project (Grant No. 03XP0338B) und OSLiB project (Grant No. 03XP0330C)
AB  - Thermal simulations of lithium-ion batteries that contribute to improvements in the safety and lifetime of battery systems require precise thermal parameters, such as the specific heat capacity. In contrast to the vast number of lithium-ion batteries, the number of specific heat capacity results is very low. This work presents a new method for accurately and easily determining the specific heat capacity of battery cells of any form factor. Using an extruded polystyrene thermal resistor, temperature logging equipment, and two temperature chambers at different temperatures, the presented approach determines the specific heat capacity of cylindrical 18650 and 21700 cells, in addition to two pouch cells, through simple temperature changes. While the cylindrical cells have very similar specific heat capacities, both pouch cells have significantly higher specific heat capacities most likely due to their different material compositions. Linear approximations of the results agree well with a temperature sensitivity of all battery models between 1.6 and 2.0 per over the range of 0 to 40 . Compared to a reference material with a known specific heat capacity, validation measurements reveal an error between 1% and 3%.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001077457100001
DO  - DOI:10.1016/j.jpowsour.2023.233499
UR  - https://juser.fz-juelich.de/record/1024900
ER  -