KIA Niro: Main High Voltage Battery Front Cover | Sub High Voltage Battery upper Cover

Removal

Warning

• Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.
• Be sure to read and follow the "High Voltage Shut-off Procedures" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

1. Shut off the high voltage circuit.

    

   (Refer to Hybrid Control System - "High Voltage Shut-off Procedures")

2. Remove the rear seat cushion.

    

   (Refer to Body - "Rear Seat Assembly")

3. Remove the rear door scuff trim.

    

   (Refer to Body - "Door Scuff Trim")

4. Remove the inlet cooling duct.

    

   (Refer to High Voltage Battery Cooling System - "Cooling Duct")

5. Open the high voltage battery cushion (A) in the direction of an arrow.

6. Remove the upper frame (A) after loosening the mounting bolts and nuts.

7. Remove the high voltage battery front cover (A) after loosening the mounting bolts and nuts.

Sub High Voltage Battery upper Cover

1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
2. Shut off the high voltage circuit.

    

   (Refer to Hybrid Control System - "High Voltage Shut-off Procedures")

3. Remove the sub high voltage battery rear cover (A) after loosening the mounting bolts.

High Voltage Battery Rear Cover mounting bolt : 7.8 - 11.8 N*m (0.8 - 1.2 kgf*m, 5.8 - 8.7 lb*ft)

4. Remove the sub high voltage battery cover (A) after loosening the mounting bolts.

High Voltage Battery Cover mounting bolt : 7.8 - 11.8 N*m (0.8 - 1.2 kgf*m, 5.8 - 8.7 lb*ft)

Sub High Voltage Battery Watertight Case

1. Remove the sub high voltage battery pack assembly.

    

   (Refer to Hybrid Control System - "Battery Pack Assembly")

2. Remove the sub high voltage battery watertight case (A) after loosening the mounting bolts.

Sub High Voltage Battery Watertight Case mounting bolt : 7.8 - 11.8 N*m (0.8 - 1.2 kgf*m, 5.8 - 8.7 lb*ft)

Installation

Warning

• Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.
• Be sure to read and follow the "High Voltage Shut-off Procedures" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

1. Install the case in the reverse order of removal.

Description

The high voltage battery system consists of the BMS ECU (Battery Management System ECU), Power
Relay Assembly (PRA), safety plug, battery temperature sensor, and battery ambient sensor.

Especially the BMS ECU controls SOC (State Of Charge), power, cell balancing, cooling and
Troubleshooting of the high voltage battery system.

The PRA includes main relays (positive, negative), pre-charge relay, pre-charge resistor and battery
current sensor.

Main Functionalities

Warning

SOC (State Of Charge): available energy of the high voltage battery

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