Components
This component distributes HV power throughout the vehicle
HV PDU
This oil must be used in Lightning's electrically driven AC compressors
POE
This internal component is responsible for disconnecting the batteries from the HV bus during a normal shutdown
Contactors
This type of charging uses standard 120V AC wall power
Level 1 *or* L1
This component is responsible for converting ~400V to ~12V to run the low voltage systems
DCDC *or* DC to DC Converter
This coolant loop uses the OEM radiator and fans for cooling
PETM *or* Power Electronics Thermal Management
Why?
Removing this item breaks the HV circuit within the battery pack
MSD *or* Manual Service Disconnect
This type of charging locks the charge handle in place while current is being delivered
Level 3 *or* L3
This on-board component is responsible for rectifying AC to DC for charging
Level 2 charger
If the cabin AC isn't working, this component might be susceptible to overheating
Batteries
The low voltage signal line is used to ensure all HV connections are closed
HVIL (High Voltage Interlock Loop)
Charge speeds are fastest within this SoC range
~20-~80%
This component has a HV DC connection, 12V supply connection, and a HV AC connection
Netpower(s) *or* Combo unit *or* DCDC/L2
This coolant loop interfaces with a chiller for increased cooling capability
High voltage leakage to the chassis causes this type of failure
Isolation
The reason to equip two level 2 chargers instead of a single
Double the charge current *or* half the charge time
Energy flow through this component can be from a HV DC input to HV AC output, OR a HV AC input to HV DC output
Traction Inverter
On the GM4500, the PETM coolant loop provides thermal control to these 4 components
Inverter, Motor, DCDC/OBCM (x2), Gearbox
These two circuits/systems are responsible for dissipating HV energy within the HV bus
Active and passive discharge circuits
In addition to the charger and batteries, these 2 other subsystems/functions might also be running during a keyed-off charge session
BTMS, DCDC