SECTION 3 - CHASSIS & TURNTABLE
3121784
3-21
3.9
LITHIUM MACHINE WITH 83V LITHIUM
BATTERY SYSTEM
Charge Information
The level of charge of the lithium pack is shown by the
icon on the right lower corner of the display, or more in
detail by the input SOC (State Of Charge).
When Lithium pack State of Charge (SOC) is lower than
21%, remote control beeper is activated to inform the
operator that machine need to be charged.
When SOC is lower than 11%, inverter feeds electric motor
with an half of the standard speed.
When SOC is lower than 6%, inverter feeds electric motor
with an extra low speed, and the following icon are dis-
played.
When SOC is 0%, machine could not be moved and the
icon “CONNECT TO THE ELECTRIC NETWORK” is displayed
in the middle of the display.
Lithium Cells
Lithium cells are managed by BMS (Battery Management
System) that continuously manages charge and discharge
operations, monitors cells parameters including their ten-
sions and their temperatures, and in case of failure opens
the internal contactor insulating the Lithium pack.
Battery Charger
The on-board battery charged is activated when its
plugged, if present it has to be used the plug fitted on the
lithium pack, otherwise the one close to the magneto-
thermic switch.
DC-DC Transformer
Apart for Lithium system that works at 76 nominal Volt,
the rest of the machine electronic boards and compo-
nents still work at 12 / 5 Volt, so Lithium system includes a
DC-DC transformer that convert the 76 Volt into 13.5 Volt.
Machine is equipped with 12 Volt battery necessary to
switch ON Lithium system.
Electric Motor
Electric motor is fed through an inverter that convert the
lithium pack direct current (DC) into alternative three-
phase current.
RPM Regulation System
RPM regulation is carried out by the following compo-
nents:
•
Master board (ECM1)
•
Inverter
•
Electric motor
Inverter is parameterized to feed the electric motor with a
pre-determinate selection of frequencies, corresponding
to a nominal rpm configurations, in case of inverter
replacement is required a new parameterization.
NOTE:
The set-point rpm could be different from the nomi-
nal rpm configuration depending on the electric
load.
RPM Setting
ECM1 through its internal contacts communicates the
required rpm selection to the inverter, which will feed the
electric motor with the relevant frequency in order to
achieve the nominal rpm selected, the actual rpm
depends also on the machine working conditions.
Number of cells in the battery
pack
72 cells, 24 groups of cells connected in
series
Nominal voltage of each cell
3.2 Volt
Capacity of one cell
50 Amps/h
Nominal features of the com-
plete pack
76 Volt –150 Amps/h
Max cell nominal voltage
3.65 Volt
Min cell operating voltage
2.5 Volt
DOD
90%
Charge cycles
3000 full cycles
Memory effect
NO
"EXTRA LOW SPEED" ICON
"CONNECT TO THE ELECTRIC" ICON
Type
Three-phase
Nominal tension
803Volt
Nominal Power
3500 Watt
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