A battery safety apparatus for safety protection of a battery, said battery comprising a plurality of energy storage cells,is disclosed herein. The battery safety apparatus comprises a signal interface comprising signal connections for obtaining a plurality of cell voltage signals, each cell voltage signal indicating a voltage provided by a corresponding one of the energy storage cells, a disconnector coupled to a conductive link connected in series with the cells and a terminal of the battery, wherein, the disconnector is configured to disconnect the conductive link in the event that one of the cell voltages is outside of a selected voltage range.