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: Resolver Sensor Repair procedures
Inspection Hybrid Drive Motor 1. Inspect the resolver sensor resistance. Item Pin Specification Remarks Resistance (Resolver sensor) 1 - 5 ...

Kia Niro 2017 (DE HEV) Service Manual: Hybrid Drive Motor Assembly Specification
Specification Item Specification Type PMSM (Interior Permanent Magnet Synchronous Motor) Max. output 32 kW / 1798 - 2500 rpm Max. torque 170 N·m / 0 - 1798 ...

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