The charger provides a number of Lithium programs including Balance, Normal, Fast and Storage. Only the Balance
mode requires the balance lead connected. However, the other modes will provide additional per-cell over-voltage
protection if
the
balance lead is connected compared to running them without it, where they can only utilize the total pack
voltage.
Balance -Fast
Yes
Yes
Balance -Slow
Yes
Yes
Charge
Optional
No
Fast Charge
Optional
No
Storage
Optional
No
Cycle - charge
Optional
No
Cycle - discharge
Optional
No
Ice= configured charge current for the CC phase
Icv = charge current during the CV phase
kv=lcc/5 OR Vout=(cell_count X cell_max_ v0.2
lcv=lcc/40 OR Vout=(cell_count X cell_max_0.2
!cv..-Icc/ 10 AND Vout=cell_count X cell_max_ voltage
lcv=Icc/5 AND Voul=cell_count X cell_max_voltage
Vout=cell_count X cell_max_ voltage
lcv=kc/10 AND Vout=cell_count X
c
ell
_
m
a
x
_
vo
l
tage
Vout=cell_count X cell_max_ voltage
cell_max_vohage
..-
configured termination voltage for the selected chemistry(eg
LiPo
=
4.2V)
celt_storage_ voltage = configured per-cell storage voltage for the selected chemistry
cell_discharge_voltage = configured per-cell s1orage vohage for the selected chemistry
lcv = charge current during the CV phase
►
Any time the battery' s balance lead is connected the charger will monitor and display the cell voltages.
►
The balancer is only active during
a
BALANCE charge(not during the CHARGE or FAST programs)
►
The balance speed setting(Slow, Normal. Fast) controls the end-of-charging current threshold.
►
The CHARGE and FAST modes are identical except for the charge-termination threshold which is 1/10 of the charge
current setting for CHARGE and 1/5 of the charge current setting for FAST mode.
►
While the CHARGE and FAST modes do not include any balancing action it is still safer to have the balance lead
connected since then the charger will provide per-cell over-voltage protection as described below.
►
In all kinds of charge cycle, if the balance lead is connected and if any
cell
exceeds the allowable per-cell peak voltage
for 1he configured chemistry, the charge current will be reduced to ensure the voltage does not rise any further. This will
slow the charging process and if the charge current falls to \/IO of the charge current setting this will result in the charge
cycle stopping altogether. Note that this is not the normal CC-to-CV transition which would usually occur when all
cells approach the nominal peak voltage for the configured Chemistry, but is a safety measure to respond to unbalanced
cells in any mode or at any time during the charge process.
9
