KIA Niro: Main High/ Sub High Voltage Battery

Kia Niro - First generation - (DE) (2017-2022) - Service and Repair Manual / Service Highlight / Power Relay Assembly (PRA) / Main High/ Sub High Voltage Battery

Main High Voltage Battery

Component Location

Power Relay Assembly (PRA)
Cell Monitoring Unit (CMU)
Battery Temperature Sensor
Runaway Arresting Device (RAD)

Warning

Main Relays (Positive, Negative), Pre-Charge Relay, Pre-Charge Resistor, and Battery Current Sensor are integrated into the PRA.

Sub High Voltage Battery

BMS ECU
Safety Plug
Cell Monitoring Unit (CMU)
Main Fuse
Runaway Arresting Device (RAD)
Battery Temperature Sensor

Warning

Main Relays (Positive, Negative), Pre-Charge Relay, Pre-Charge Resistor, and Battery Current Sensor are integrated into the PRA.

High Voltage Battery Control System / Schematic Diagrams

Schematic Diagram

Troubleshooting Flow

Troubleshooting Flow

BMS ECU Terminal and Input/Output Signal

BMS ECU Terminal and Input/Output Signal

Terminal Funxtion

Terminal Funxtion

Connector (B11-1A)

Connector (B11-1B)

Connector (B11-1B)

Connector (B11-2A)

Connector (B11-2A)

Connector (B11-2B)

Connector (B11-2B)

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.

Safety Plug Description and operation

Description Safety Plug is installed on the rear side of the high voltage battery and it can mechanically shut the high voltage circuit off when servicing the high voltage system. (i.e. High Voltage Battery, Power Relay Assembly, HPCU, BMS ECU

The Power Relay Assembly

Description The Power Relay Assembly (PRA) consists of the positive and negative main relays, pre-charge relay, pre-charge resistor and battery current sensor. It is located inside the battery pack assembly and controls the high voltage power c

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Safe Exit Assist settings

Exit Safety Kia NIRO Hybrid Kia Niro EV A: Driver Assistance Driving Safety Exit Safety With the vehicle on, touch Settings ? Driver Assistance ? Warning Volume on the instrument cluster or Settings ? Vehicle ? Driver A

DC Fuse

Component Location DC Fuse Inverter Connector (↔ Power Relay Assembly (PRA)) Inverter Connector (↔ Electric A/C compressor) Component Location Harness Connector DC Fuse Repair procedures Removal Warning Be sure to rea