Address allocation circuit and electric device

The utility model relates to the technical field of charging, in particular to an address distribution circuit and an electric device. The address allocation circuit comprises a plurality of control units, the plurality of control units comprise a master control unit and at least one slave control unit, the master control unit and the slave control unit are sequentially connected in series, and the master control unit allocates addresses to the slave control unit; wherein a first circuit is arranged between any two adjacent control units, and the output IO port of the previous control unit is connected with the input IO port of the next control unit through the first circuit; the first circuit comprises a first optical coupler U1 and a first switching device, and the output IO port, the first optical coupler U1, the first switching device and the output end of the first circuit are electrically connected in sequence. According to the address distribution circuit of the utility model, the safety of the battery management system can be improved, and the limitation of system design can be solved.