Multistage battery management system for ring network communication

The invention relates to the technical field of battery management, in particular to a multi-stage battery management system for looped network communication, which comprises a looped network battery management link formed by a plurality of stages of battery controllers; each level of battery controller is provided with a first group of interfaces and a second group of interfaces, and the first group of interfaces comprises at least one first communication interface connected with the upper level of battery controller or adjacent equipment in the looped network; the second group of interfaces comprises at least one second communication interface which is connected with a subordinate battery controller or adjacent equipment in the looped network, and each battery controller is connected with the other two battery controllers; the adjacent devices in the looped network are battery controllers of the same level or external devices. The problems that an existing battery management system is small in communication