Method and device for determining utility of replacement of battery pack for electric vehicle

A device for estimating a utility of replacement of a battery pack for an electric vehicle, comprising:

• a memory configured to store state data associated with a first battery pack and a second battery pack, the state data comprising usage history of the first battery pack and performance parameters of the first battery pack and the second battery pack;
• and
• a processor configured to determine a utility value according to the state data, wherein the utility value is used to characterize a degree of impact of an operation of replacing the first battery pack with the second battery pack on service efficiency and service life of a battery pack set to which the first battery pack and the second battery pack belong,
• wherein the performance parameters of the first battery pack and the second battery pack comprise current energy storage values of the first battery pack and the second battery pack and a range factor and a power factor of the second battery pack, the range factor increases as the maximum driving range of the second battery pack increases, the power factor increases as the maximum discharging power of the second battery pack increases, and the utility value increases as a difference between the current energy storage values of the first battery pack and the second battery pack, the range factor, and the power factor increase.