Kia Niro: High Voltage Battery Control System / Pre-Charge Relay Description and operation

Description

Built into the Power Relay Assembly (PRA), the Pre-Charge Relay starts to charge the capacitor of the inverter soon after ignition "ON", then it goes out when the capacitor has been fully charged.

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]

Pre-Charge Relay Specifications
Specification Item Specification Contact Rated Voltage (V) 450 Rated Current (A) 10 ...

Pre-Charge Relay Schematic diagrams
Circuit Diagram ...

Other information:

Kia Niro 2017 (DE HEV) Service Manual: Pre-Charge Relay Specifications
Specification Item Specification Contact Rated Voltage (V) 450 Rated Current (A) 10 Coil Operating Voltage (V) 12 Resistance (Ω) ...

Kia Niro 2017 (DE HEV) Service Manual: Water Temperature Control Assembly Repair procedures
Removal and Installation Water Temperature Assembly    • Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage sys ...

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