BMW I01 Product Information page 92

I01￿High-voltage￿Components
5.￿High-voltage￿Battery￿Unit
Cooling￿system￿of￿the￿high-voltage￿battery
The￿high-voltage￿battery￿unit￿in￿the￿I01￿is￿cooled￿directly￿by￿refrigerant.￿The￿refrigerant￿circuit￿of￿the
air￿conditioning￿system￿is￿therefore￿made￿up￿of￿two￿parallel￿branches:￿One￿for￿cooling￿the￿passenger
compartment￿and￿one￿for￿cooling￿the￿high-voltage￿battery￿unit.￿For￿each￿branch￿there￿is￿a￿combined
expansion￿and￿shutoff￿valve￿in￿order￿to￿be￿able￿to￿control￿the￿cooling￿functions￿independent￿of
each￿other.￿The￿battery￿management￿electronics￿can￿activate￿and￿open￿the￿combined￿expansion
and￿shutoff￿valve￿by￿applying￿voltage.￿In￿this￿way￿refrigerant￿can￿flow￿to￿the￿high-voltage￿battery,
expanding,￿evaporating￿and￿cooling￿in￿the￿process.￿The￿cooling￿of￿the￿passenger￿compartment￿is￿also
effected￿in￿a￿condition-based￿manner.￿The￿combined￿expansion￿and￿shutoff￿valve￿upstream￿from￿the
evaporator￿can￿also￿be￿activated￿electrically￿and￿by￿the￿EDME.
Entire￿heating/cooling￿system￿of￿the￿high-voltage￿battery
Index
1
2
3
4
5
6
86
Explanation
Capacitor￿in￿the￿refrigerant￿circuit
Electric￿fan,￿refrigerant￿circuit￿for￿passenger￿compartment
EKK
Dryer￿flask
High-voltage￿battery￿unit
Combined￿expansion￿and￿shut-off￿valve￿in￿the￿refrigerant￿circuit￿(for￿cooling
high-voltage￿battery)