TY - JOUR
T1 - Novel Loop Heat Pipe System for EV Thermal Management of Batteries
T2 - Effects of Ambient Temperatures
AU - Bernagozzi, Marco
AU - Georgoulas, Anastasios
AU - Miche, Nicolas
AU - Marengo, Marco
PY - 2023/11/17
Y1 - 2023/11/17
N2 - Building from previous successful results from the Authors, a Loop Heat Pipe (LHP) based Battery Thermal Management System (BTMS) is investigated over a range of different ambient temperatures (from 20°C to 50°C), using a state-of-the-art environmental chamber. LHPs act as thermal vector from the bottom of the battery pack to a remote chiller, while graphite sheets allow to achieve a satisfactory level of temperature homogenization of the cells surface, with low added weight. This design was developed aiming to improve on fast charge timings, all-electric range, reduce costs and complexity, and decrease maintenance requirements. Preliminary studies showed the potential of this innovative BTMS to give better performances than standard active counterparts. The aim of this work is to extend the investigation towards a practical application, by matching experimental results obtained in the environmental chamber with a validated numerical Lumped Parameter Model and extend the results database to different geometries and material/fluid configurations, to support the adoption of this technology by automotive manufactures. Results showed a successful validation campaign, with average temperature discrepancy between the experimental results and the numerical prediction of 0.4°C. Further simulations results demonstrated how the proposed BTMS performs efficiently at higher temperatures, limiting cells maximum temperatures below 60°C even at ambient temperatures of 50°C, increasing safety.
AB - Building from previous successful results from the Authors, a Loop Heat Pipe (LHP) based Battery Thermal Management System (BTMS) is investigated over a range of different ambient temperatures (from 20°C to 50°C), using a state-of-the-art environmental chamber. LHPs act as thermal vector from the bottom of the battery pack to a remote chiller, while graphite sheets allow to achieve a satisfactory level of temperature homogenization of the cells surface, with low added weight. This design was developed aiming to improve on fast charge timings, all-electric range, reduce costs and complexity, and decrease maintenance requirements. Preliminary studies showed the potential of this innovative BTMS to give better performances than standard active counterparts. The aim of this work is to extend the investigation towards a practical application, by matching experimental results obtained in the environmental chamber with a validated numerical Lumped Parameter Model and extend the results database to different geometries and material/fluid configurations, to support the adoption of this technology by automotive manufactures. Results showed a successful validation campaign, with average temperature discrepancy between the experimental results and the numerical prediction of 0.4°C. Further simulations results demonstrated how the proposed BTMS performs efficiently at higher temperatures, limiting cells maximum temperatures below 60°C even at ambient temperatures of 50°C, increasing safety.
KW - electric vehicle
KW - thermal management
KW - batteries
KW - loop heat pipe
KW - ambient temperatures
U2 - 10.1016/j.trpro.2023.11.015
DO - 10.1016/j.trpro.2023.11.015
M3 - Article
SN - 2352-1465
VL - 70
SP - 162
EP - 169
JO - Transportation Research Procedia
JF - Transportation Research Procedia
ER -