19
Troubleshooting
ESS
The Energy Storage System (ESS) is the vehicle
battery pack. It includes the Battery Management
System (BMS) and heating and cooling circuits to
help maintain the proper operating temperature in
Component descriptions
High Voltage Batteries
The high voltage batteries are available in three
configurations: 141 kWh, 209 kWh, and 282 kWh.
In the 141 kWh configuration, the ESS consists of
two battery packs designated Pack 1 and Pack 2. In
the 282 kWh configuration, the ESS consists of four
packs designated Pack 1 through Pack 4. Each
battery pack includes an internal heating circuit and
cooling loop. The layout of the 209 kWh option is not
yet defined.
S-Box
The S-Box is the interface between the ESS and the
other vehicle systems. It includes the Battery
Management System (BMS) which manages and
balances the charging and discharging of the
batteries.
ESS Cooling System
The ESS cooling system helps to maintain the
proper operating temperature in the ESS. It uses a
chiller and pump to circulate coolant through the
battery packs. It is one of three coolant loops on the
vehicle along with the cooling system and the heater.
Chiller
The chiller uses a refrigeration cycle to remove heat
from the ESS coolant circuit. It is powered by 24V
low voltage and communicates via the CAN network.
It also receives analog feedback from a coolant level
sensor in the coolant reservoir. The chiller includes
the Thermal Management System (TMS) which
manages the battery temperature.
Chiller Tank
The chiller tank is the reservoir for the ESS cooling
system. It has an internal sensor which reports the
fluid level to the chiller.
Cooling Circuit
The cooling circuit runs through each ESS battery
pack. For the 141 kWh ESS configuration, there is a
single cooling loop which runs through both battery
packs. For the 282 kWh configuration, there are two
parallel cooling loops which each run through two of
the four battery packs. The layout of the 209 kWh
option is not yet defined.
Warning:
The high voltage batteries are
NOT serviceable and should NEVER be
opened. Only the MSDs and HV cable
connections should be accessed according
to repair and safety procedures.
Содержание SPICER PACCAR 220ev
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