BMW I01, Информация о продукте

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I01�High-voltage�Components
5.�High-voltage�Battery�Unit
87
Index Explanation
7 Heat�exchanger
8 Blower�for�passenger�compartment
9 Combined�expansion�and�shutoff�valve�in�the�refrigerant�circuit�(for�cooling�the
passenger�compartment)
10 Evaporator,�passenger�compartment
During�cooling�the�battery�cells�emit�heat�energy�to�the�refrigerant.�While�the�battery�cells�are�cooled
down,�the�refrigerant�is�heated.�The�EKK�compresses�the�refrigerant�again�and�in�the�capacitor�it
returns�to�a�liquid�state.�As�a�result,�the�refrigerant�is�once�again�able�to�absorb�heat�energy.�This�way
the�maximum�cooling�power�of�about�1000 W�can�be�generated.�In�other�words:�A�heat�output�of�up�to
1000 W�can�be�discharged�by�the�high-voltage�battery.�This�maximum�cooling�power�is�only�required
at�a�very�high�ambient�temperature�and,�at�the�same�time,�a�high�drive�power.
In�order�to�cool�battery�cells�using�refrigerant,�there�is�a�heat�exchanger�located�below�the�cell�modules
which�is�made�from�flat�aluminium�pipes.�They�are�connected�to�the�internal�refrigerant�lines�and
refrigerant�flows�through�them�during�cooling.
Heating
Vice�versa,�if�the�I01�was�parked�outside�for�example�for�several�days�at�temperatures�below�0 °C,�it
makes�sense�to�heat�the�battery�cells�before�departure�and/or�to�their�optimal�temperature�level.�They
then�deliver�their�full�power�before�the�journey�commences.�The�customer�can�use�this�option�if�the
vehicle�is�connected�to�the�power�network�using�the�charging�cable�and�the�function�for�the�interior
air�temperature�control�of�the�vehicle�was�selected.�In�order�to�warm�up�the�batteries,�the�high-voltage
system�is�activated�and�electrical�current�is�sent�through�a�network�of�heating�wires.�This�network�of
heating�wires�is�arranged�along�the�coolant�ducts.�As�the�coolant�ducts�and�the�cell�modules�touch,
the�heat�generated�in�the�heater�coils�is�transmitted�to�the�cell�modules�and�therefore�the�battery�cells.
5.4.�Internal�structure�of�the�high-voltage�battery�unit
The�information�on�the�internal�structure�and�other�functions�of�the�high-voltage�battery�unit�can�be
found�in�the�product�information�bulletin�"I01�High-voltage�Battery�Unit".
A�repair�of�the�high-voltage�battery�unit�is�only�intended�in�a�dealership�with�the�Service�format�"BMW�i
Extended�Battery�Service"�or�"BMW�i�Full�Service".