Power Management - Stiga e-PARK 220 Workshop Manual

WORKSHOP MANUAL CHAPTER EDITION PAGE
9 - ELECTRONIC MANAGEMENT - BATTERY
e-PARK 220 2018 65 /
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9.2.2 Power management

When drained, by turning the ignition key of the machine, the 48-12V DCDC converter starts to
supply all the devices with 12V power supply:
– BMS
– VMS
– Display
– Electric height adjustment control
– Safety circuit
The self-holding of the key contact is then carried out by the VMS through Relay1. Once this con-
tact is closed, it is possible to release the key keeping the machine in the on mode.
If the charging cable is not plugged into the socket and no anomalies are detected on the pack,
the BMS closes the KS contactor to supply the power line. In addition, the BMS enables the opera-
tion of the motor controllers via a 12V signal (Pin D20).
If the startup procedure is correct:
– emergency switch released,
– operator present,
– brake pedal pressed,
– accelerator pedal in neutral,
and the controllers are fault-free, the AC-0 controller closes the KZTP contactor to provide access
to the power line: the AC-0 traction controller is powered via the 50 A fuse while the ACE-0 blade
controller is powered via the 125 A fuse.