Hyundai Ioniq (AE): High Voltage Battery Control System / Description and operation
The high voltage battery system consists of the BMS ECU (Battery Management System ECU), Power Relay Assembly (PRA), safety plug, battery temperature sensor, and battery ambient sensor. Especially the BMS ECU controls SOC (State Of Charge), power, cell balancing, cooling and troubleshooting of the high voltage battery system.
The PRA includes main relays (positive, negative), pre-charge relay, pre-charge resistor and battery current sensor.
[Main Functionalities]
Item
|
Functionality
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SOC Control
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| Optimize SOC by using voltage, current, temperature of the high voltage battery |
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Power control
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| Predict available battery power, prevent from over-charging or discharging, improve durability and maximize charging/discharging energy by calculating optimum charging & discharging energy in accordance with the vehicle state |
|
Power Relay control
| | •
| Supply or shut off the battery power when IG ON/OFF |
| •
| Prevent from negligent accident by high voltage system trouble |
|
Cooling System control
| | •
| Sustain the optimum temperature by controlling variable cooling fan speed in accordance with the maximum system temperature and deviation among battery modules |
|
Troubleshooting
| | •
| Diagnose system fault |
| •
| Limit battery power in various fail-safe level |
| •
| Control power relays in case of system trouble |
|
| •
| SOC (State Of Charge) : Available energy of the high voltage battery |
|
SpecificationSafety Plugâ–· Specification
Item
Specification
Rated Voltage (V) 400 Rated Current (A) 80 Fuse Rated Current (A) 125 Fuse Melting Time Rated Current x 110% Min.
Other information:
DescriptionThe In-car air temperature sensor is built in the heater & A/C control unit.The sensor contains a thermistor which measures the temperature of the inside. The signal decided by the resistance value which changes in accordance with perceived inside temperature, is delivered to heater control unit and according to this signal the contr
Replacement
When prying with a flat-tip screwdriver or use a prying trim tool, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.1.Disconnect the negative (-) battery terminal.2.Recover the refrigerant with a recovery / recycling / charging station.
