Storage battery online replacement device

The invention relates to a storage battery online replacement device. The storage battery online replacement device comprises an air switch I, a rectifier element, an air switch II, an electric current meter and a direct-current fuse which are connected in sequence through wires, the air switch I and the direct-current fuse are connected with a connector terminal respectively, two voltmeters are connected in parallel, one end of the voltmeters is connected to the input end of the rectifier element, and the other end of the voltmeters is connected to the output end of the direct-current fuse. According to the storage battery online replacement device, the situation of replacing a storage battery under the condition of supplying the electricity uninterruptedly becomes possible, the work reliability of a direct current system is enhanced, and the direct current system accidents are avoided. 本发明涉及种蓄电池在线更换装置，其结构为，空气开关I、整流元件、空气开关II、电流表、直流熔断器通过导线依次连接，空气开关I和直流熔断器分别连接接头端子，两个电压表并联后，端连接在整流元件的输入端，另端连接在直流熔断器的输出端。本发明使在不间断供