Patent ID: 8129944

Claim:
A control device for a secondary battery having a plurality of battery cells forming a plurality of battery blocks, comprising: an abnormality sensing unit sensing the fact that a cell voltage value of one of said plurality of battery cells falls outside a preset range and outputting an abnormality notification indicating a result of the sensing; a voltage sensing unit sensing a plurality of block voltages corresponding to said plurality of battery blocks, respectively, and outputting a plurality of first voltage values representing said plurality of block voltages, respectively; an offset addition unit calculating, in response to reception of said abnormality notification, an offset amount common to said plurality of first voltage values based on said plurality of first voltage values, said preset range and the number of said battery cells included in each of said plurality of battery blocks, and producing a plurality of second voltage values by adding said offset amount to each of said plurality of first voltage values; and a charge/discharge control unit limiting the charge power of said secondary battery and the discharge power of said secondary battery based on said plurality of second voltage values produced by said offset addition unit.