General Information: General Description

WARNING: This page is about a different variant/trim than selected.

* What is the High Voltage Battery System?

The High Voltage Battery System consists of the Battery Management System Control Unit (BMS-ECU), Power Relay Assembly (PRA) and a Cooling Blower.

Each function is listed below:

High Voltage Battery: Supplies electrical energy for acceleration and receives/stores electrical energy during deceleration.
BMS ECU: Controls the High Voltage Battery by monitoring the voltage, current and temperature.
PRA (Power Relay Assembly) consists of relays which link and cut high voltage, and finally, current sensor which monitors battery current. Those are an assembly in PRA.
A safety plug: It can cut high voltage flowing as mechanically in order to protect technicians. And, there is a safety fuse in the safety plug that protect over current.
Cooling Blower: Maintains proper High Voltage Battery temperature.

* The battery cell function and roles:

The High Voltage battery cell is the smallest unit of the High Voltage Battery pack.

The voltage of each cell is 3.75V. The battery pack will attain 270V by connecting all 72 cells in a series.

The BMS ECU monitors all of the 72 high-voltage cells, 5 battery temperature sensors, an ambient temperature sensor, a current sensor which checks the main battery and an auxiliary battery temperature sensor.

* The High-voltage battery specification is displayed below:

Operating Voltage: for a battery pack: 200 ~ 310V (for a battery cell: 2.75 ~ 4.3)

Operating temperature: -30°C (-22°F) ~ 55°C (131°F)

Storage temperature: -40°C (-40°F) ~ 65°C (149°F)

Operating Current: During charge (-) 200A ~ During Discharge (+) 200A.

■ Field Action When High Voltage Battery Discharges

SOC %	Vehicle Control Logic	Warning Lamp			Field Action
SOC %	Vehicle Control Logic	MIL	SVL	FUEL	Field Action
Over 30%	Normal Driving	-	-	-	-
30 ~ 25%	Motor torque limit (Acceleration Delay)	-	-	On	Fuelling, Check SOC
		On	-	-	Repair the part related to MIL/SVL Charge battery by starting engine Fuelling if necessary
		On	On	-
		-	On	-
		On	On	On
25 ~ 20%	Inhibition of EV driving No FATC	-	-	On	Fuelling, Check SOC
		On	-	-	Repair the part related to MIL/SVL Charge battery by starting engine Fuelling if necessary
		On	On	-
			On	-
		On	On	On
20 ~15%	Can not start vehicle	On	-	-	Repair the part related to MIL/SVL Start the engine with GDS → Charging battery Fuelling if necessary
		On	On	-
		-	On	-
		On	On	On
Under 15%		On	-	-	Repair the part related to MIL/SVL If necessary, Replace Battery Pack Fuelling if necessary
		On	On	-
		-	On	-
		On	On	On