Control Device and Control Method for a Secondary Battery

摘要

A control device for a secondary battery using positive electrode active material made of solid solution material, comprising: a voltage detecting unit configured to detect an actual open circuit voltage value; an SOC detecting unit configured to detect an actual state of charge value on a basis of the actual open circuit voltage value and/or an actual current value; a memory unit configured to store a voltage-SOC standard control curve which shows a relation between an open circuit voltage value and a state of charge value; a presumed voltage calculating unit configured to calculate a presumed voltage value on the basis of the actual state of charge value and the voltage-SOC standard control curve stored in the memory unit; a determining unit configured to determine sameness between the actual voltage value detected by the voltage detecting unit and the presumed voltage value calculated by the presumed voltage calculating unit.

主权项

1. A control device for a secondary battery using, as positive electrode material, positive electrode active material made of solid solution material, comprising:
a voltage detecting unit configured to detect an actual open circuit voltage value of the secondary battery; a current detecting unit configured to detect an actual current value of the secondary battery; an SOC detecting unit configured to detect an actual state of charge value on a basis of the actual current value of the secondary battery; a memory unit configured to store a voltage-SOC standard control curve which shows a relation between an open circuit voltage value of the secondary battery and a state of charge value; a presumed voltage calculating unit configured to calculate a presumed voltage value on the basis of the actual state of charge value detected by the SOC detecting unit and the voltage-SOC standard control curve stored in the memory unit; a determining unit configured to determine sameness between the actual voltage value detected by the voltage detecting unit and the presumed voltage value calculated by the presumed voltage calculating unit; and a control unit configured to at least perform a discharge process so as to make the difference between the actual voltage value and the presumed voltage value smaller before a next charge process when the sameness is determined lower than a predetermined range by the determining unit.