EL-50332 EV/HEV Battery Service Tool
Midtronics Inc. 7000 Monroe Street Willowbrook, IL 60527
www.midtronics.com
14
Chapter 2: Section Balance
Use this function to charge or discharge a section of a
battery pack to bring it in balance with the other sec-
tions of the pack.
NOTE:
Depending on the charge condition of the bat-
tery pack and the battery section being balanced, this
process can take up to 8 hours to perform.
Hazardous voltage.
An improper connection can result in
electric shock
To avoid electrical shock or burn, never alter
the EV/HEV Battery Service Tool’s original AC
cord and plug. Disconnect plug from outlet
when EV/HEV Battery Service Tool is idle.
IMPORTANT:
Make sure to properly prepare the bat-
tery pack by following all required GM guidelines Refer
to your GM documentation for complete information.
Before balancing a battery section, make sure all of the
external components connected to the EL-50332 are in good
working order.
1. At the Main Menu, highlight the Section Balance icon and
press
SELECT
.
2. Use
or
to select the TYPE and press
NEXT
to con-
tinue, or press the corresponding number keys.
The EL-50332 performs a Self-Test before advancing to the
next step.
3. Use
or
to select the TARGET section you would like to
balance and press
NEXT
to continue.
4. Make the necessary cable connections to the selected sec-
tion of the battery.
Connect the BBDU Low Voltage Interface cable from the VIM
to the black and gray hybrid battery contactor assembly
connectors on the battery pack.
5. Press
NEXT
to begin the section balance operation.
6. The EL-50332 detects the battery section to be balanced
and then enters into a SECTION BALANCE setup mode and
attempts to detect the battery section selected.
If the detection is successful, balance process begins and
the status is displayed on the screen.
Charging
Voltage
Target
Voltage
Target
Cell
Status
Charging
Current
Amp
Hours
Charging
Time
Section Balance Results
Following a successful Section Balance session, the results are
written to an inserted USB jump drive.
NOTE:
A Warranty Code is generated for all Section
Balancing sessions including aborted sessions and
anytime an error is detected. The Warranty Code is
also written to the USB jump drive and displayed on
the Battery Service Tool screen.
1. Once the session is complete, the results are displayed on
the EL-50332 using multiple screens.
2. Use
or
to scroll through the screens
NOTE:
If the measured voltage is already at the
entered Target Voltage, no conditioning is re-
quired and the session is aborted.
3. Press
EXIT
to return to the Main Menu.
The EL-50332 can now be disconnected from the battery pack.
Chapter 2: Section Balance
