JLG X20JP - X600AJ Service Manual - Manual (Page 137)

SECTION 3 - CHASSIS & TURNTABLE
3121623 – JLG Lift – 3-113
Eight temperature sensors are distributed in the battery
pack near the cells, in order to monitore the temperature
level.
If the internal temperature grow too much, the BMS acti-
vate two fans to cool down the temperature inside the
pack (air cooling).
If everything is ok, BMS feeds the coil of the internal con-
tactor (relay), so the current can go outside the battery
pack. In case of failure or incorrect parameters, BMS
keeps the internal contactor open and the current cannot
reach the inverter.
Figure 3-42. 72 Volts battery pack
Lem sensor inform the BMS about the exact current
going inside or outside the battery pack. Lem sensor is
located in the end of in the series cells connexions.
Figure 3-43. Lem Sensor