BMW I01, Информация о продукте

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I01�High-voltage�Components
11.�Cooling�the�Electrical�Machine
Components
170
• Terminal�15�switched�on,�driving�readiness
• Terminal�15�switched�on,�no�driving�readiness
• High-voltage�battery�is�charged.
The�power�electronics�switching�of�the�electrical�machine�electronics�are�already�working�when
terminal�15�is�switched�on.�Both�the�high-voltage�electrical�system�(EKK�and�electric�heating)�and�the
12 V�vehicle�electrical�system�are�supplied�with�energy�by�the�DC/DC�converter.�If�due�to�the�arising
heat�a�cooling�requirement�is�identified,�the�coolant�pump�is�switched�on,�and�if�required�also�the
electric�fan.
When�terminal�15�is�switched�the�coolant�pump�and�electric�fan�can�be�switched�on�automatically.
For�work�with�an�open�engine�compartment�lid�or�at�the�cooling�module�it�is�imperative�terminal�15�is
switched�off.
While�the�high-voltage�battery�is�being�charged,�the�power�electronics�in�the�electrical�machine
electronics�and�in�the�convenience�charging�electronics�are�working.�Due�to�the�high�electrical
power,�which�is�generated�in�the�electrical�machine�electronics�and�the�convenience�charging
electronics,�heat�also�develops.�This�must�be�dissipated�using�the�cooling�circuit�described�here.
For�this�reason,�the�electric�coolant�pump�and�the�electric�fan�are�also�switched�on�during�charging
with�a�correspondingly�high�temperature�in�the�electrical�machine�electronics�and�in�the�convenience
charging�electronics.
The�coolant�pump�and�the�electric�fan�can�be�switched�on�automatically�when�charging�the
high-voltage�battery.�The�high-voltage�battery�cannot�be�charged�when�working�with�the�engine
compartment�lid�open�or�at�the�cooling�module.