APPARATUS AND METHOD FOR CONTROLLING BATTERY MODULE, POWER SUPPLY DEVICE AND SYSTEM

The present application relates to an apparatus for controlling a battery module, a power supply device and a power supply system, e.g. for cloud computing or cloud serving applications having high requirements for uninterruptible power supplying. The apparatus for controlling a battery module includes a switch circuit and a first power controller. The switch circuit is coupled with a battery module in series between a first busbar and a second busbar to form a conductive loop. The first power controller is coupled with the switch circuit, a first busbar, a second busbar, and a battery module, and is configured to: detect a voltage between the first busbar and the second busbar and monitor a voltage and a power of the battery module; enter a charging mode and control the switch circuit to conduct in a first direction, in a case of the voltage between the first busbar and the second busbar being greater than the voltage of the battery module and the power of the battery module being smaller than a first preset power; and enter a discharging mode and control the switch circuit to conduct in a second direction, in a case of the voltage between the first busbar and the second busbar being smaller than the voltage of the battery module and the power of the battery module being greater than a second preset power.