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: Rear Door Belt Outside Weatherstrip Repair procedures
Replacement 1. Pull down the rear door window glass to the lowest level by pressing the power window glass switch. 2. Remove the rear door belt outside weatherstrip (A) after loosening the mounting screw. 3. ...

Kia Niro 2017 (DE HEV) Service Manual: Pre-Charge Resistor Description and operation
Description Built into the Power Relay Assembly (PRA), the Pre-Charge Resistor protects the high voltage circuit by limiting the current while the inverter capacitor is being charged. 1. High Voltage Power Terminal (-) 2. High Voltage Power Terminal (+) 3. ...

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