KIA Niro: Sub High Voltage Battery

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.

Sub High Voltage Battery

1. Switch "OFF" the ignition and disconnect the negative (-) terminal of the auxiliary 12V battery.
2. Shut off the high voltage circuit.

   (Refer to Hybrid Control System - "High Voltage Shutoff Procedure")

3. Remove the sub high voltage battery system assembly.

   (Refer to High Voltage Battery System - "Removal")

4. Remove the high voltage battery watertight case.

   (Refer to High Voltage Battery System - "Case")

5. Disconnect the cell monitoring unit connector (A).
6. Remove the cell monitoring unit (B) after loosening the mounting screws.

Cell Monitoring Unit #1

Cell Monitoring Unit #2

Cell Monitoring Unit #3

Cell Monitoring Unit #4

Cell Monitoring Unit #5

Cell Monitoring Unit #6

Main High Voltage Battery

1. Switch "OFF" the ignition and disconnect the negative (-) terminal of the auxiliary 12V battery.
2. Shut off the high voltage circuit.

   (Refer to Hybrid Control System - "High Voltage Shutoff Procedure")

3. Remove the main high voltage battery system assembly.

   (Refer to High Voltage Battery System - "Removal")

4. Disconnect the cell monitoring unit connector (A).
5. Remove the cell monitoring unit (B) after loosening the mounting screws.

Cell Monitoring Unit #7

Cell Monitoring Unit #8

Cell Monitoring Unit #9

Cell Monitoring Unit #10

Cell Monitoring Unit #11

Cell Monitoring Unit #12

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 in the reverse order of removal.

Description

The Runaway Arresting Device (RAD) is attached to the upper part of each module.

If the high voltage battery is swollen due to overcharging of the battery cell, the main relay (+), main relay (-), and pre-charge relay coil ground lines are cut off via RAD to prevent the operation of the main relay and pre-charge relay in case of overcharging.

If the high voltage battery is in normal condition, the switch is intact. The switch is cut off if the cell is overcharged.

When the switch is cur off, it is impossible to drive.

Sub High Voltage Battery

Main High Voltage Battery

Circuit Diagram

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