BMW I01 Product Information page 124

I01￿High-voltage￿Components
6.￿Charging￿the￿High-voltage￿Battery
Only￿when￿the￿communication￿between￿the￿vehicle￿(LIM)￿and￿Electric￿Vehicle￿Supply￿Equipment￿has
been￿started￿successfully￿via￿the￿pilot￿line,￿is￿the￿charging￿voltage￿applied￿to￿the￿phase L1.￿This￿also
gives￿further￿protection￿for￿customers￿and￿Service￿employees￿against￿the￿dangers￿of￿electricity.
With￿this￿stationary￿version￿of￿the￿EVSE￿the￿lines￿can￿transmit￿up￿to￿7.4 kW.￿The￿AC/DC￿converter
in￿the￿convenience￿charging￿electronics￿(3.7 kW)￿and￿in￿the￿electrical￿machine￿electronics￿(3.7 kW)
ensure￿the￿conversion￿of￿the￿single-phase￿AC￿voltage￿to￿the￿direct￿current￿voltage￿required￿for
charging￿the￿high-voltage￿battery.￿The￿duration￿of￿the￿full￿charge￿of￿an￿empty￿high-voltage￿battery￿of
the￿I01￿can￿then￿be￿reduced￿to￿three￿to￿four￿hours.
6.3.3.￿Convenience￿charging￿electronics
The￿convenience￿charging￿electronics￿(KLE)￿is￿installed￿in￿the￿rear￿of￿the￿I01,￿in￿an￿area￿separated￿from
the￿luggage￿compartment.
Installation￿location￿of￿the￿convenience￿charging￿electronics
The￿main￿task￿of￿the￿convenience￿charging￿electronics￿(KLE)￿during￿AC￿charging￿at￿7.4 kW￿is￿the
conversion￿of￿the￿AC￿voltage￿to￿direct￿current￿voltage.￿A￿rectifier￿switching￿in￿the￿KLE￿comprising￿two
modules￿completes￿this￿task.￿These￿power￿electronics￿modules￿are￿controlled￿by￿a￿control￿unit,￿which
also￿bears￿the￿same￿name:￿Convenience￿charging￿electronics￿(KLE).
The￿convenience￿charging￿electronics￿is￿designed￿so￿it￿can￿provide￿a￿maximum￿electrical￿power￿of
3.7 kW￿on￿the￿output￿side.￿Together￿with￿the￿3.7 kW￿from￿the￿standard￿power￿electronics￿of￿the￿EME,
this￿is￿sufficient￿in￿the￿I01￿to￿fully￿charge￿the￿high-voltage￿battery￿(at￿optimal￿marginal￿conditions)￿in
three￿to￿six￿hours.￿This￿short￿charging￿time￿means￿enhanced￿comfort￿for￿the￿customer￿when￿using￿the
I01.￿For￿this￿reason,￿this￿charging￿electronics￿was￿called￿"convenience￿charging￿electronics".
The￿AC￿voltage￿is￿fed￿to￿the￿vehicle￿or￿the￿convenience￿charging￿electronics￿via￿a￿single-phase￿supply.
The￿input￿voltage,￿which￿can￿be￿processed￿by￿the￿convenience￿charging￿electronics,￿may￿be￿in￿the
following￿range:￿100 V￿–￿240 V,￿50 Hz￿or￿60 Hz.￿At￿the￿output,￿which￿is￿separated￿galvanically￿from
the￿input,￿the￿convenience￿charging￿electronics￿supplies￿an￿electronically￿adjustable￿direct￿current
voltage￿or￿an￿electronically￿adjustable￿direct￿current￿flows.￿The￿specifications￿for￿the￿output￿voltage
and￿the￿output￿current￿come￿from￿the￿function￿"High-voltage￿power￿management"￿in￿the￿EME￿control
unit.￿The￿values￿are￿calculated￿and￿adjusted￿by￿the￿KLE￿so￿that￿the￿high-voltage￿battery￿is￿optimally
charged￿and￿the￿other￿consumers￿in￿the￿I01￿are￿supplied￿with￿sufficient￿electrical￿energy.
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