Disconnect -type battery management system and back -up source

The utility model provides a disconnect -type battery management system and back -up source, the system includes: N sampling module, every the sampling module in the N sampling module is connected through a sampling line and a group battery hot plug in the power battery package, and every sampling module sampling is rather than the reference ground voltage of continuous group battery, and wherein, power battery wraps the group battery that includes a N series connection, voltage determination module, voltage determination module include a N divider resistance, and according to different relation of connection between sampling line and the group battery, the reference ground voltage of a N group battery that the sampling module was sampled respectively generates different voltage signal, behind a N divider resistance, judges the voltage output end and can export the voltage of judging of difference, the treater, the treater links to each other with judging the voltage output end, and whether the treater takes