Kia Niro: 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
|
SOC control
|
| • |
Optimize SOC by using voltage, current, temperature of the high
voltage battery
|
|
Power control
|
| • |
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
|
| • |
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
|
Component Location
1. BMS ECU
2. Safety Plug
3. Main Relay (+)
4. Main Relay (-)
5. Pre Charge Relay
6. Pre-Charge Resistor
7. Battery Cur ...
Other information:
Kia Niro 2017 (DE HEV) Service Manual: High voltage shut-off procedures
High Voltage Shut-off Procedures
•
Be sure to read and follow the “General Safety Information and
Caution” before doing any work related with the high voltage system.
Failure t ...
Kia Niro (DE HEV) Owners Manual: Driving on grades
Reduce speed and shift to a lower gear before you start down a long or steep
downgrade. If you don’t shift down, you might have to use your brakes so much that
they would get hot and no longer operate efficiently.
On a long uphill grade, shift down and reduce your speed to around 70 km/h (45 ...
Components and components location
Schematic diagrams