Patent ID: 8825247

Claim:
A system for managing battery charge of an electric vehicle, the system comprising a control server including a processor and a non-transitory computer readable medium, wherein the processor executes computer program instructions embodied in the non-transitory computer readable medium to perform the steps of: receiving a first charging request of a first user; generating first charging information including a first charging tolerance time and a first charging cost according to a charging mode included in user information associated with the first user and power information including on or more time zones; determining a pre-registered second user having a movable second charging tolerance time among users of which charging information is already generated; recalculating the second charging tolerance time of the pre-registered second user according to movement of the second charging tolerance time, recalculating the first charging tolerance time after the second charging tolerance time is moved, recalculating a second charging cost of the second user, and recalculating the first charging cost; when a sum of the recalculated first and second charging costs is less than a sum of a sum of the previously calculated first and second charging costs, regenerating the first charging information including the recalculated first charging tolerance time and the recalculated first charging cost and regenerating the second charging information including the recalculated second charging tolerance time and the recalculated second charging cost; and transmitting the first charging information.