Patent ID: 8336651

Claim:
A charge/discharge control device for a secondary battery configured to be capable of receiving/transmitting electric power from/to a load, the device being programmed to have: a battery state estimation portion sequentially calculating a state estimation value indicative of a battery state in the interior of said secondary battery according to a battery model capable of dynamically estimating an internal state of said secondary battery, based on a detection value by a sensor provided for said secondary battery; a deterioration rate prediction portion for predicting a deterioration rate of the secondary battery in a case where said secondary battery continuously inputs/outputs a prescribed power from a present time, based on said state estimation value at the present time estimated by said battery state estimation portion; and a load control portion generating an operation command for said load in consideration of the deterioration rate predicted by said deterioration rate prediction portion, based on an operation request to said load, wherein said deterioration rate prediction portion predicts respective said deterioration rates for a plurality of said prescribed power at the present time.