METHOD FOR CONTROLLING AND DEVICE FOR CONTROLLING SECONDARY BATTERY

[PROBLEM] To suppress a side reaction of a secondary battery associated with a positive electrode potential and a negative electrode potential. [SOLVING MEANS] A control apparatus has a controller configured to control charge and discharge of a secondary battery. The controller acquires a positive electrode potential and a negative electrode potential of the secondary battery. The controller controls the charge and discharge of the secondary battery such that each of the positive electrode potential and the negative electrode potential changes within a range between an upper limit value and a lower limit value set for each of the positive electrode potential and the negative electrode potential.