Kia Soul EV: High Voltage Battery Control System / Pre-charge Relay Description and Operation

Kia Soul EV (PS EV) 2015-2020 Service Manual / EV Battery System / High Voltage Battery Control System / Pre-charge Relay Description and Operation

Description
Installed in the Power Relay Assembly (PRA), the Pre-charge Relay connects high voltage circuit when pre-charging the inverter capacitor.
When the IG is ON, the current coming through the pre-charge relay and the resistor charges the capacitor in the inverter and when the capacitor is fully charged, the pre-charge relay turns OFF.
[With High Voltage Battery Heater System]

1. Main Relay (+)
2. Main Relay (-)
3. Pre Charge Relay
4. Pre Charge Resistor
5. Battery Current Sensor
6. High Voltage Battery Heater Relay
7. High Voltage Battery Heater Fuse

[Without High Voltage Battery Heater System]

1. Main Relay (+)
2. Main Relay (-)
3. Pre Charge Relay
4. Pre Charge Resistor
5. Battery Current Sensor


Operation

Pre-charge Relay Specifications
Specification ItemSpecificationONRated Voltage(V)450Rated Ampere(A)10Voltage Drop(V)Less than 0.5 (10A)CoilOperation Voltage(V)12Resistance(?)104.4 ~ 127.6 (20°C) ItemSpecificationRemarkM ...

Pre-charge Relay Schematic Diagrams
System Circuit Diagram With High Voltage Battery Heater System Without High Voltage Battery Heater System Circuit Diagram Without High Voltage Battery Heater System With High Voltage Batt ...

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