The invention discloses a control method and device of a battery
management system, a medium and photovoltaic cleaning equipment, the method is applied to the photovoltaic cleaning equipment, and the photovoltaic cleaning equipment comprises a battery, a
motion controller connected with the battery through a
secondary loop relay, and a motor connected with the battery through a main loop
relay. A solar MPPT connected with a battery through a charging
relay comprises the steps that after a wake-up source is detected, a
secondary loop relay is controlled to be closed, and a battery
management system enters an initial state; obtaining a motor driving instruction and a solar MPPT charging port
voltage; and switching the opening and closing states of the main loop relay and the charging relay according to the motor driving instruction and the
voltage of the solar MPPT charging port, so that the battery
management system enters a corresponding working state. Therefore, the working state of the battery management
system is changed by switching the opening and closing states of the main loop relay and the charging relay, so that the photovoltaic cleaning equipment can utilize
light energy at the
maximum efficiency and respond to an operation instruction in real time.