Charging control method for battery system and vehicle using the same

A method performed by a vehicle, the method comprising:

• obtaining, via a Global Positioning System (GPS) device of the vehicle, position information of the vehicle;
• determining, based on the position information, an altitude of the vehicle;
• comparing, via in-vehicle infotainment (IVI) circuitry of the vehicle, the altitude of the vehicle with a predetermined first threshold altitude;
• and
• based on the altitude of the vehicle being higher than or equal to the predetermined first threshold altitude, limiting, via the IVI circuitry of the vehicle, a target SOC for a battery system of the vehicle to a predetermined first SOC value.

A vehicle comprising:

• a motor configured to provide driving power for the vehicle;
• an inverter configured to supply power to the motor or receive power from the motor;
• a battery system configured to supply power to the inverter or receive charging power from the inverter;
• a positioning circuit configured to determine an altitude of the vehicle;
• and
• onboard information circuitry configured to:
• determine, based on the altitude of the vehicle satisfying a predetermined threshold, an estimated power generation by regenerative braking of the vehicle via a downhill driving,
• based on the determined estimated power generation, set a limit to a target state of charge (SOC) of the battery system such that the target SOC does not exceed a predetermined SOC value lower than a full charge, and
• provide information indicating the limited target SOC to the battery system to reserve regenerative braking capacity of the battery system,
• wherein the battery system is further configured to limit charging of a battery pack based on the limited target SOC, such that at least a portion of regenerative power generated during downhill driving is provided to the battery pack of the battery system.