Page 52 - ATZ WORLDWIDE
P. 52
DEVELOPMENT THERMAL MANAGEMENT
FIGURE 5 Efficient utilisation of waste
heat with coolant/coolant heat pump
(© Mahle Behr)
cells as well. While the requirements for increases the required specific cooling of powertrains, such as fuel cells. Mahle
the battery, electric motor, and electron- capacity by about 28 %. The design of the has the experience and expertise to
ics remain the same, heating the hydro- front end of the vehicle must therefore develop and implement such holistic
gen is yet another task, FIGURE 6. include a larger radiator area and higher solutions. In addition, products and sys-
Compared with a combustion engine, air mass flow through the radiator. tems needed for such complex thermal
about 30 % more specific cooling capac- management of hybrid and battery-elec-
ity must be provided for the powertrain. HOLISTIC SOLUTIONS FOR ALL tric vehicles, or those with fuel cell pow-
Although the absolute quantity of heat DRIVE TYPES ertrains, are provided.
produced by a fuel cell drive is indeed
comparable, it occurs at a lower tempera- Holistic and intelligent thermal manage-
ture (80 to 90 °C in comparison with ment is a basic prerequisite for accept- REFERENCE
[1] Jung, M.; Kemle, A.; Strauss, T.; Wawzyniak, M.:
105 °C). The delta to the outside tempera- ance of battery-electric mobility. It is Interior Heating for Hybrid and Electric Vehicles. In:
ture is thus significantly lower. This also decisively important for other types ATZworldwide 113 (2011), No. 5, pp. 36-40
FIGURE 6 Schematic cooling circuit for
a fuel cell solution (© Mahle Behr)
50
