Hyundai KONA Electric Emergency Response Manual page 19

KONA Electric Main Systems
12
High-Voltage Electrical Isolation
Unlike the 12V electrical system that is grounded to the vehicle's chassis, the KONA Electric's high-
voltage electrical system is designed to be isolated from the vehicle.
Regulation of High-Voltage Electrical Current
Current from the High-Voltage Battery is
controlled by the Power Relay Assembly
(PRA), which consists of Positive and
Negative Main Relays, a Pre-charge Relay,
Pre-charge Resistor, and the Battery Current
Sensor. The PRA is mounted front side of the
High-Voltage Battery Pack Assembly and
controls the high-voltage power circuit
between the High-Voltage Battery and the
Electric Power Control Unit.
PRA
High-Voltage Safety System
There are multiple safety systems
incorporated into the KONA Electric. The
system that protects the High-Voltage
Electrical System is called the Battery
Management System (BMS). The BMS is
located inside the Power Relay Assembly and
measures several parameters to maintain the
optimal performance of the High-Voltage
Battery. It controls the battery cooling fan to
ensure proper battery operation. In addition,
if a system fault occurs, the BMS turns off the
PRA to protect the system.
BMS