BMW I01 Product Information page 86

I01￿High-voltage￿Components
5.￿High-voltage￿Battery￿Unit
Connections￿of￿the￿high-voltage￿battery￿unit,￿left
Index
1
2
3
4
5
6
A￿contact￿is￿available￿for￿shielding￿around￿each￿of￿the￿two￿electrical￿contacts￿for￿the￿high-voltage
cables.￿The￿shielding￿of￿the￿high-voltage￿cable￿(shielding￿for￿each￿cable)￿is￿continued￿into￿the￿housing
of￿the￿high-voltage￿battery￿unit￿and￿thus￿contributes￿to￿the￿electromagnetic￿compatibility￿(EMC).
In￿addition,￿the￿high-voltage￿connection￿provides￿protection￿against￿contact￿with￿live￿parts.￿The
actual￿contacts￿are￿coated￿in￿plastic￿so￿that￿nobody￿can￿touch￿them￿directly.￿Only￿when￿the￿cable￿is
connected￿is￿the￿coating￿pushed￿away￿and￿the￿contact￿established.￿The￿plastic￿slide￿serves￿as￿the
mechanical￿latch￿mechanism￿of￿the￿connector.￿In￿addition,￿it￿is￿also￿an￿element￿of￿a￿safety￿function:￿If
the￿high-voltage￿cable￿is￿not￿connected,￿the￿slide￿conceals￿the￿connection￿for￿the￿bridge￿of￿the￿high-
voltage￿interlock￿loop.￿Only￿when￿the￿high-voltage￿cable￿is￿properly￿connected￿and￿the￿connector
is￿locked,￿is￿this￿connection￿accessible￿and￿the￿bridge￿can￿be￿inserted.￿This￿guarantees￿that￿only
when￿a￿high-voltage￿cable￿is￿connected￿is￿the￿circuit￿of￿the￿high-voltage￿interlock￿loop￿also￿closed.
This￿principle￿applies￿to￿all￿high-voltage￿connections￿in￿the￿I01,￿for￿instance￿connections￿at￿the￿high-
voltage￿battery￿unit,￿at￿the￿electrical￿machine￿electronics,￿at￿the￿convenience￿charging￿electronics
and￿at￿the￿range￿extender￿electrical￿machine￿electronics.￿The￿high-voltage￿system￿can￿only￿be￿active
when￿all￿high-voltage￿cables￿are￿connected.￿This￿is￿additional￿protection￿against￿contact￿with￿contact
surfaces,￿which￿otherwise￿may￿carry￿voltage.
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Explanation
Vent￿hole
High-voltage￿interlock￿loop￿connector/bridge
Mechanical￿slide
Separate￿contact￿for￿high-voltage￿cable
Contact￿for￿shielding
Contact￿protection