Distributed energy storage battery management system

The invention provides a distributed energy storage battery management system which is connected with N battery modules formed by sequentially connecting more than one single battery in series, the distributed energy storage battery management system comprises a main board, N slave boards and a high-voltage board, and the main board is electrically connected with an external control circuit through an external CAN bus; the main board is electrically connected with the N slave boards and the high-voltage board through an internal CAN bus. The N slave plates are electrically connected with the N battery modules in a one-to-one correspondence manner; the external CAN bus and the internal CAN bus are mutually independent; n is any natural number greater than 1; according to the system, the modular design is adopted, the independent slave board is used for collection and management, the voltage collection wiring harness is the shortest, and the problem that the manufacturing cost of a traditional energy storage ba