Service Manual

Workman GTX Electric Lithium Page 3B -- 9 Electrical System
SC1: Lithium--Ion Battery Controller
The m achine uses a Lithium–ion battery controller or
Battery Management System (BMS) to manage the lithi-
um--ion batteries. Each of the four lithium--ion batteries
communicates with the BMS through a sub--net via the
battery interface harness. The battery interface harness
includes a 4--pin connector at each of the batteries and
a 9--pin connector at the BMS. The BMS uses the
sub–net to verify the presence and condition of each of
the batteries before allowing battery power to the ma-
chine. The BMS is also connected to the CAN bus which
allows it to forward battery information to the rest of the
machine. The BMS is located under the seat attached
to the seat base rear panel.
The Lithium–ion battery controller (BMS):
1. Monitors the batteries via a sub--net (battery inter-
face harness).
Note: All of the battery interface harness connections
must be corrosion free and securely connected before
machine operation can occur.
2. Protects the batteries from operating (discharging
and charging) outside their safe operating voltage, am-
perage, and temperature ranges.
3. Operates an internal contactor to connect and dis-
connect the batteries from the machine and the battery
charger.
Note: When the key switch is set to the Off position,
the BMS delays disconnecting the batteries from the
machine for approximately 3 seconds to allow time f or
all of the other machine controllers to shut down.
4. Communicates battery information to the machine
during operation via the CAN bus.
5. Communicates battery information to the battery
charger via the CAN bus.
1. SC1: Lithium--ion battery controller
Figure 13
1
Refer to SC1: lithium--ion battery controller testing for
more information.
IMPORTANT: Do not open the lithium--Ion battery
controller. There are no serviceable parts on or in
the controller. If you open the controller, you will
void the warranty. The controller is protected by
tamper--alerting devices.
Note: If the SC1: Lithium--Ion Battery Controller is re-
placed for any reason, the machine software must be
updated; contact an Authorized Toro Distributor for as-
sistance.
Electrical
System