Decommissioned power battery power supply device

The utility model relates to the technical field of power batteries. The utility model discloses a retired power battery power supply device. The system comprises a power battery pack, a battery management system module, a high-voltage distribution box and an echelon utilization power utilization loop, the power battery pack comprises a plurality of retired power battery modules with different attenuation degrees; the retired power battery modules are connected in parallel; the power battery pack is electrically connected with the battery management system module; the echelon utilization powerutilization loop comprises a plurality of parallel power utilization loops, the output power of the plurality of power utilization loops is not completely the same, the residual electric quantity inthe retired power battery can be orderly utilized, the residual power supply capability of the retired power battery can be played, the over-fast attenuation of the capacity of the retired power battery is slowed down, and the