Kia Niro: High Voltage Battery Control System / Main Relay (+) / (-) Description and operation

Description

Main Relay is divided into the positive (+) relay and negative (-) relay. It is integrated into the Power Relay Assembly (PRA) and connects the power supply line and ground line between the high voltage battery and the inverter in accordance with the BMS ECU control signal.

1. High Voltage Power Terminal (-)
2. High Voltage Power Terminal (+)
3. Battery Current Sensor
4. Inverter Power Terminal (-)
5. Inverter Power Terminal (+)
6. Pre-Charge Resistor
7. Main Relay (+)
8. Pre-Charge Relay
9. Main Relay (-)
10. Power Relay Assembly Connector (Battery current sensor signal input)
11. Power Relay Assembly Connector (Main relay control)

[PRA Operation Sequence]

Main Relay (+) / (-) Specifications
Specification Item Specification Contact Rated Voltage (V) 450 Rated Current (A) 80 ...

Main Relay (+) / (-) Schematic diagrams
Circuit Diagram [B03-C] (Relay Control) [B03-S] (Relay Control) ...

Other information:

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Kia Niro 2017 (DE HEV) Service Manual: TPMS Receiver Repair procedures
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