CONTROL CIRCUIT FOR PREVENTING BATTERY GROUP FROM BEING REVERSELY CONNECTED AND POWER SUPPLY SYSTEM FOR BASE STATION

A control circuit for preventing a battery group (101) from being reversely connected includes a normally-open contactor (102), a first normally-open relay (103), a first diode (104), a second diode (105), a second normally-open relay (106), a third diode (107) and a controller (111). By sending a control command, the controller (111) controls the control coil of the second normally-open relay (106) to work or not to work, thus controls the normally-open contactor (102) to turn on or off, so that the battery group (101) being protected can be connected with or disconnected from a power supply system for a base station. The power supply system for a base station is also provided. With the control circuit, the battery group can be automatically connected to or disconnected from the power supply system for the base station, and a battery group with medium or high capacity can be disconnected from the power supply system in time when the battery group is reversely connected, thus protecting the system.