JLG X20JP - X600AJ Service Manual - Manual (Page 316)

SECTION 6 - JLG CONTROL SYSTEM
6-100 – JLG Lift – 3121623
However the current required has to decrease during the
charging process.
In the last charging steps (balancing phase), the current
required to the battery charger should fluctuate every 5-15
seconds from zero to 6/7 Amp.
If the SOC (%) value is far from 100% and the current
required is not the maximum one, possibly there is a prob-
lem with one cell.
DMCC (%) – DMDC (%): Not important
SOC (%): It is the charge level of the battery pack; it corre-
spond to the value showed by the remote control display.
100% is the maximum, 0% is the minimum, however the
value 0% is not the complete cells discharge point, there
is still residue cells power in order to prevent the cells from
excessive low voltage.
SOC (%) depends on the status of all the cells.
Current (A): It is the value of the current measured by the
LEM sensor. With sign “–“the current is going out from the
battery pack (discharge), if there is no sign, the current is
going inside the pack (charge).
During the charge, if the machine is not moving, CUR-
RENT (A) value should be close to the DMCC (A) value,
because the current the BMS requires to the battery char-
ger is almost the same of the current going inside the
pack.
If for example DMCC (A) value is 25 Amp, and the Current
(A) value is -1,5 Amp, the battery charger is disconnected
or one contactor is open.
If the main key is on with machine not under charge, Cur-
rent (A) value should be around -1,5/2 Amp, that is the
current absorbed from all the ECMs and the remote con-
trol.
In the same condition, if the lead battery level is down, the
Current (A) negative value grows because the system has
recharge the lead battery too.
Current SYNC (A): If present, it is the same value of Cur-
rent (A) but updated every 100 ms, so it change faster
Rem. Energy (KWh): Power still available in the battery
pack
Rem. Capacity (Ah): Capacity still available in the battery
pack
SOH (%): State of health of the battery pack; it indicates
how much the battery pack performance are good respect
the performance when the pack was new.
When the battery pack is new, this value should be about
100%; cycles of charges and discharges, temperatures
and other elements, can influence it.
SOH(%)= “zero” means the pack has still 80% of the
capacity compared with a new one, so if we read for
example SOH (%) 1%, the meaning is that the perfor-
mance of this battery pack are about 80% of when it was
new.
NOTE: SOH (%), Rem Energy (KWh) and Rem Capacity (Ah) is
the same data showed in different ways.