BMW I01, Информация о продукте

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I01�High-voltage�Components
11.�Cooling�the�Electrical�Machine
Components
164
Index Explanation
1 Radiator
2 Electric�coolant�pump�(80 W)
3 Electrical�machine�electronics�(EME)
4 Electrical�machine
5 Convenience�charging�electronics�(KLE)
6 Range�Extender�Electrical�Machine�Electronics�(REME)
7 Range�extender�electrical�machine
8 Mechanical�coolant�pump
9 Additional�electric�fan�for�range�extender�cooling�unit�(coolant-refrigerant�heat
exchanger)
10 Engine�oil-to-coolant�heat�exchanger
11 Range�extender�for�W20�engine
12 Coolant�temperature�sensor
13 Expansion�tank�in�the�cooling�circuit�of�the�combustion�engine
14 Thermostat
15 Coolant-refrigerant�heat�exchanger�for�range�extender
16 Scope�is�only�installed�for�equipment�with�range�extender
17 Expansion�tank�in�the�cooling�circuit�of�the�electric�motor�components
18 Electric�fan�for�the�radiator
The�components�to�be�cooled�are�switched�in�the�cooling�circuit�so�that�the�maximum�temperature
levels�required�are�observed.�A�lower�temperature�is�required�for�the�electrical�machine�electronics
than�for�the�electrical�machine,�which�is�why�the�series�connection�in�this�sequence�was�chosen.�As
the�electric�motor�and�the�convenience�charging�electronics�are�not�operated�at�the�same�time,�the
parallel�circuit�was�chosen.�The�range�extender�electrical�machine�and�the�range�extender�electrical
machine�electronics�are�switched�initially�in�series.�As�these�two�components�are�operated�at�the
same�time�as�the�convenience�charging�electronics�and�the�electrical�machine�electronics,�they�were
switched�in�parallel�to�these.�In�addition,�the�cooling�system�is�therefore�not�designed�for�the�sum�of�all
heat�outputs,�because�in�reality�heat�only�has�to�be�discharged�in�one�or�two�of�the�parallel�branches.
If�the�vehicle�is�equipped�with�a�range�extender,�in�the�cooling�circuit�there�is�a�coolant-coolant�heat
exchanger�for�cooling�the�W20�engine.