Method and system for controlling charging and discharging for a hybrid vehicle

A method of controlling charging and discharging for a hybrid vehicle, wherein the hybrid vehicle includes a motor operated by power of a battery and an integrated starter-generator (ISG) configured to start an engine or generate electric power by torque of the engine, the method comprising:

• changing, by a control unit, a running mode of the hybrid vehicle to a regenerative braking mode when the hybrid vehicle is coasting;
• controlling, by the control unit, the motor to generate electric power in the regenerative braking mode;
• and
• operating, by the control unit, the ISG by electric power generated by the motor.

A system for controlling charging and discharging for a hybrid vehicle, the system comprising:

• a motor configured to be operated by power of a battery;
• an integrated starter-generator (ISG) configured to start an engine or generate electric power by torque of the engine;
• an engine clutch configured to control power transmission between the engine and the motor;
• and
• a control unit configured to operate the ISG using electric power generated by the motor in a regenerative braking mode when the hybrid vehicle is coasting and the battery is in a charge limiting state.

A non-transitory computer readable medium containing program instructions for controlling charging and discharging of a hybrid vehicle and being executed by a control unit, wherein the hybrid vehicle includes a motor operated by power of a battery and an integrated starter-generator (ISG) configured to start an engine or generate electric power by torque of the engine and the control unit configured to control the motor and the ISG, the computer readable medium comprising:

• program instructions that change a running mode of the hybrid vehicle to a regenerative braking mode when the hybrid vehicle is coasting;
• program instructions that control the motor to generate electric power in the regenerative braking mode;
• program instructions that determine whether a state of charge (SOC) of the battery is a charge limiting state;
• and
• program instructions that operate the ISG by electric power generated by the motor when the SOC of the battery is the charge limiting state.