Cell Balance; Standby - Toro Greensmaster eFlex 1800 Service Manual

Cell Balance

Standby

Greensmaster ® eFlex 1800, 2100 and 2120
12189SL Rev E
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Once the pack has charged to 100% state of charge (SOC), the battery pack
will determine if cell balancing is necessary. If necessary, it will equalize the
individual cells in the battery pack. The charger will cease to output current
and voltage, and will present a high impedance connection at the high voltage
terminal of the battery. If cell balancing is not necessary, the charger will
progress to the standby mode.
Once the battery pack accomplishes cell balancing to the required level, it will
send a CAN message to the charger to commence charging again (at the voltage
and current limits indicated via CAN). The pack and charger will go through this
cycle 2 to 3 times until either the battery pack is satisfied with the results of the
cell equalization or 18 hours has passed. Now, the pack will change to Charge
Done state, and the charger will respond by shutting down the battery pack. If
the pack fails to terminate the balancing or charging within 19 hours from start
of charge, the charger will terminate the charge. In either case, the charger will
shut the pack down and switch to the Standby state.
During cell balancing, the battery voltage, state of charge (as percent of fully
charged), and amperage will be displayed in the LCD message display.
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The charger stays in standby mode from completion of charge until 24 hours from
start of charge has passed. While in standby, the charger LCD message display
is held in the brightly lit mode. Once the 24 hours time period has elapsed, the
charger will go into its lowest power consumption mode of Hibernate.
During standby, the battery state of charge (as percent of fully charged) will be
displayed in the LCD message display. Typically, SOC for a fully charged battery
will be from 98% to 100%.
Figure 65
Cell Balance Message Screen
Figure 66
Standby Message Screen
Page 5–13 Electrical System: Lithium Battery Pack Charger
Operation (for Models 04042, 04043 and 04046)