Vehicle driving system and vehicle

A vehicle driving system comprising:

• a first battery;
• a second battery;
• a drive motor-generator connected to the first battery and the second battery via respective relays;
• a power receiving unit connected to the first battery and the second battery via respective relays and also connected to an external power supply,
• wherein
• the first battery is configured to be charged and discharged at a current rate of higher than or equal to 5 C;
• the second battery has a higher capacity than the first battery;
• and
• a controller configured to:
• cause the drive motor-generator to be connected to the first battery when an output power value required by the drive motor-generator is higher than or equal to a predetermined output power value and the state of charge of the first battery is higher than or equal to a predetermined SOC;
• and
• cause the drive motor-generator to be connected to the second battery when the output power value required by the drive motor-generator is higher than or equal to the predetermined output power value and the state of charge of the first battery is lower than the predetermined SOC.

A vehicle driving system comprising:

• a first battery;
• a second battery;
• a drive motor-generator connected to the first battery and the second battery via respective relays;
• a power receiving unit connected to the first battery and the second battery via respective relays and also connected to an external power supply,
• wherein
• the first battery is configured to be charged and discharged at a current rate of higher than or equal to 5 C;
• the second battery has a higher capacity than the first battery;
• and
• a controller configured to:
• cause the drive motor-generator to be connected to the second battery when an output power value required by the drive motor-generator is lower than a predetermined output power value and the state of charge of the second battery is higher than or equal to a predetermined SOC;
• and
• cause the drive motor-generator to be connected to the first battery when the output power value required by the drive motor-generator is lower than the predetermined output power value and the state of charge of the second battery is lower than the predetermined SOC.

A vehicle driving system comprising:

• a first battery;
• a second battery;
• a drive motor-generator connected to the first battery and the second battery via respective relays;
• a power receiving unit connected to the first battery and the second battery via respective relays and also connected to an external power supply,
• wherein
• the first battery is configured to be charged and discharged at a current rate of higher than or equal to 5 C;
• the second battery has a higher capacity than the first battery;
• and
• a controller configured to:
• when the power receiving unit is connected to the external power supply,
• cause the first battery to be charged if the state of charge of the first battery is lower than a predetermined SOC, and
• cause the second battery to be charged if the state of charge of the first battery is higher than or equal to the predetermined SOC;
• and
• cause the first battery to be charged from the second battery when both the first battery and the second battery are disconnected from the drive motor-generator and the state of charge of the first battery is lower than a predetermined SOC.