Battery management system capable of meeting fast switching sub-box charging mode

The invention discloses a battery management system capable of meeting fast switching sub-box charging mode, which adopts a multiple communication bus distribution structure, supports two charging modes, i.e. fast switching sub-box charging and whole car charging, and consists of a main control module, a detection module, handheld equipment and the like. In the fast switching sub-box charging mode, a car battery carries out ground sub-box charging, and the battery management system can conduct battery capacity detection, state estimation and charging control and ensure the safety and high efficiency of charging process; besides, the battery management system also solves the problems of battery group capacity, SOC estimation, battery group matching and fast failure positioning after a batter group is rearranged on a car, thus ensuring that the battery group rearranged in the car can normally work. The battery management system realizes fast switching sub-box charging mode, simplifies the structure of a charger and improves the control and function of the battery management system and the uniformity of the battery group and the operation efficiency of the car.