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:
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Inspection
1.
Switch "OFF" the ignition.
2.
Disconnect the evaporator temperature sensor connector.
3.
Measure the resistance between positive (+) and negative (-) terminals
of the evaporator temperature se ...