BMW I01 Product Information page 113

I01￿High-voltage￿Components
6.￿Charging￿the￿High-voltage￿Battery
Index
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Communication￿with￿EVSE￿via￿pilot￿and￿proximity￿line
The￿pilot￿line￿and￿the￿proximity￿line￿are￿realized￿as￿simple￿signal￿lines.￿These￿signal￿lines￿are￿shielded
and￿end￿at￿a￿connector￿in￿the￿charging￿interface￿module￿LIM.
Via￿the￿proximity￿line￿the￿connection￿of￿the￿charging￿plug￿in￿the￿charging￿socket￿at￿the￿vehicle￿is
identified,￿as￿well￿as￿the￿maximum￿current￿carrying￿capacity￿of￿the￿charging￿cable￿determined.￿In￿the
connector￿of￿the￿charging￿cable￿there￿is￿an￿ohmic￿resistor￿between￿the￿proximity￿connection￿and￿the
protective￿earth.￿The￿LIM￿applies￿a￿measured￿voltage￿and￿calculates￿which￿value￿the￿resistance￿in
the￿proximity￿line￿has.￿The￿resistance￿value￿specifies￿which￿maximum￿current￿level￿is￿allowed￿for￿the
charging￿cable￿used￿(dependent￿on￿the￿line￿cross-section).￿The￿assignment￿of￿resistance￿–￿current
level￿is￿specified￿in￿the￿standard￿IEC 61851.
The￿pilot￿line￿is￿required￿for￿the￿determination￿and￿transmission￿of￿the￿maximum￿available￿charging
current￿level.￿The￿pilot￿signal￿is￿a￿bipolar￿rectangle￿signal￿(-12 V￿to￿+12 V).￿The￿voltage￿and￿the￿duty
cycle￿are￿used￿for￿the￿communication￿of￿different￿statuses￿between￿EVSE￿and￿I01:
• Electric￿vehicle￿is￿ready￿to￿charge￿(Yes/No)
• Fault￿present￿(Yes/No)
• Maximum￿charge￿current￿which￿can￿be￿provided￿by￿the￿AC￿voltage￿network.
Explanation
Body￿Domain￿Controller￿(BDC)
Terminal￿status,￿driving￿readiness￿switched￿off
Dynamic￿Stability￿Control￿(DSC)
Vehicle￿speed
Electrical￿Digital￿Motor￿Electronics￿(EDME)
Status￿of￿parking￿lock￿(engaged/disengaged),￿power￿requirement￿in￿the￿high-
voltage￿vehicle￿electrical￿system
Charging￿interface￿module￿(LIM)
Charging￿socket￿at￿the￿vehicle
Status￿of￿the￿charging￿socket￿cover￿and￿the￿charging￿plug
Electrical￿machine￿electronics￿(EME)
Actual￿value￿of￿the￿set￿charging￿power,￿charging￿voltage￿and￿charging￿current
level,￿charging￿release
Electrical￿Digital￿Motor￿Electronics￿(EDME)
Information￿whether￿the￿charging￿cable￿is￿connected￿and￿the￿charging
procedure￿is￿active
Charging￿socket
Activation￿of￿LEDs￿for￿locator￿lighting￿and￿charging￿status￿display,￿status￿of￿the
charging￿socket￿cover.
Instrument￿cluster
Signals￿for￿the￿display￿of￿charging￿information
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