Charging Infrastructure - SMART Fortwo 451 Series Introduction Into Service Manual

All components of the smart fortwo electric drive
which are involved in the charging process (on-
board charger, charge socket, charging cable)
have been standardised in line with future
requirements in accordance with international
standards (e.g. IEC62196-2). This allows for
simple charging on a wide range of power grids
and charging infrastructures.
Charging process:
The entire charging process is monitored. The
on-board charger and the power source
(charging station) communicate via a data line in
the charging cable (Control Pilot, CP). In the
process, the signals "ready", "not ready" and
"charge" are transmitted. In the case of intelli-
gent charging stations, digital communication
also takes place via Powerline (PLC - Powerline
Communication) on lines L1 and N. For this
purpose, data are transferred as per the protocol
specified in ISO/IEC 15118.
When charging at a household power outlet, the
charging current may have to be limited in order
to avoid overloading the local power grid.
The maximum permissible charging current can
therefore be set via the control box on the
charging cable or alternatively via the multifunc-
tion display in the vehicle.
The last selected value is retained on the multi-
function display until the next change is made.
Introduction of smart fortwo electric drive (3rd Generation) • Model Series 451

Charging infrastructure

The exact charging process and the various
charging options are described in the current
operating instructions.
When the connector of the charging cable is
plugged into the charger feed-in socket, the on-
board charger wakes the control units involved in
the charging process via CAN bus.
31