KIA Niro: Main High/ Sub High Voltage Battery

Main High Voltage Battery

Component Location

  1. Power Relay Assembly (PRA)
  2. Cell Monitoring Unit (CMU)
  3. Battery Temperature Sensor
  4. 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

  1. BMS ECU
  2. Safety Plug
  3. Cell Monitoring Unit (CMU)
  4. Main Fuse
  5. Runaway Arresting Device (RAD)
  6. 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

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     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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