Toro Greensmaster eTriFlex 3360 Service Manual page 111

48 VDC System Components
Greensmaster® eTriFlex 3360 and 3370
19239SL Rev B
The eTriFlex 48 VDC system includes a 48 VDC battery pack, an engine driven
starter/generator (model 04580), two front traction motors, a steering input
device and a steering motor, three cutting unit lift/lower actuators, three cutting
unit motors, a main contactor and a traction motor contactor. An optional rear
wheel traction motor and an LED light kit that runs on 48 VDC are also available.
Circuit protection for the 48 VDC system includes fourteen fuses in a variety of
styles and locations. The 48 VDC system is an isolated system so the vehicle
frame is not used for any ground connections in this system. On model 04580
machines, each component has a separate wire leading to a ground bus located
on the left side of the machine. On model 04590 machines, each component
has a separate wire leading to the negative (-) terminal of the lithium-ion battery
controller (BMS).
A 48V battery disconnect is located behind the left side cover of the machine.
Use the 48V battery disconnect to make sure that 48 VDC components do not
operate unexpectedly when performing service procedures.
•
On model 04580 machines, the battery pack is composed of four 12 VDC
sealed batteries connected in series to achieve the necessary 48 VDC
system voltage. The batteries are maintenance free AGM, valve regulated
lead acid batteries.
•
On model 04590 machines, the battery pack is composed of eight 48 VDC
lithium-ion batteries located in one center mounted and two side mounted
assemblies. The batteries are connected in parallel and managed by a
lithium–ion battery controller (SC8).
When connecting the individual batteries in the 48 VDC system,
make sure that battery polarity is correct. System damage can occur
if the individual batteries are not connected correctly.
A starter/generator is used on model 04580 machines only. The starter/generator
is a 48 VDC, air cooled, brushless, permanent magnet device. The
starter/generator has its own internal inverter and on-board controller. The
InfoCenter Display can be used to monitor starter/generator activity during
machine operation. The starter/generator also manages the precharge function
for model 04580 machines.
Model 04590 machines include a Lithium-ion Battery Controller (SC8: Battery)
to monitor the condition of the eight 48V lithium-ion batteries used to power
the machine. The controller is also known as the Battery Management System
(BMS). The BMS has the ability to connect the 48V lithium-ion batteries to
the machine during power up, and disconnect the batteries from the machine
during shut down.
A separate Precharge controller (T6: Precharge) manages the precharge
function for model 04590 machines.
The main contactor exists in the 48 VDC system to connect the 48V battery pack
with the starter/generator, and the cutting unit motor and optional rear traction
motor controllers. The starter/generator controller determines when the main
contactor is engaged.
The traction motor contactor exists in the 48 VDC system to connect the 48 VDC
system with the 2 front traction motors. The controller for the right side traction
motor determines when the traction motor contactor is engaged.
IMPORTANT
Page 5–7 Electrical System: Electrical System Operation