BATTERY SYSTEM OF VEHICLE, CHARGING AND DISCHARGING METHOD, AND VEHICLE

A battery system of a vehicle, a charging and discharging method, and a vehicle. The system includes an energy storage apparatus () and a direct current (DC) charging and discharging interface (), where the energy storage apparatus () includes a first battery pack () and a second battery pack (), and a first inter-battery switch () and a second inter-battery switch () are disposed between adjacent battery packs; an incoming line terminal () of the first inter-battery switch () is connected to a first electrode of the first battery pack (); a second outgoing line terminal () of the second inter-battery switch () is connected to a second electrode of the energy storage apparatus (); and a first electrode of the DC charging and discharging interface () is connected to the first electrode of the energy storage apparatus ().