An electric vehicle comprising: a vehicle drive apparatus configured to receive electricity to generate vehicle drive power and to generate electricity; a secondary battery configured to receive electricity from the vehicle drive apparatus and to output electricity to the vehicle drive apparatus; a current sensor configured to detect an electric current input into the secondary battery or an electric current output from the secondary battery; and an electronic control unit configured to control charging and discharging of the secondary battery above a lower limit capacity, wherein the electronic control unit is configured to calculate an evaluation value indicating a degree of deterioration of the secondary battery due to non-uniformity in salt concentration in the secondary battery caused by charging and discharging of the secondary battery, wherein the evaluation value is an integrated value of damage quantities of the secondary battery calculated in a prescribed cycle, which are based on the detected electric current and the prescribed cycle, and the electronic control unit is configured to execute control of raising the lower limit capacity of the secondary battery when the evaluation value reaches a prescribed threshold, characterized in that: the electronic control unit is configured to calculate a damage quantity of the secondary battery in the prescribed cycle by the following expression: D N = D N − 1 − α × Δ t × D N − 1 + β / C × I × Δ t, wherein D denotes a present calculation value of a damage quantity D, D(N - 1) denotes an immediately preceding calculation value of a damage quantity D, α is a forgetting coefficient corresponding to a diffusion velocity of ions in the electrolytic solution of the secondary battery, Δt is the prescribed cycle, β is a current coefficient, C denotes a limit threshold, and I denotes the detected electric current, and the electronic control unit is configured to calculate the evaluation value in the prescribed cycle by the following expression: Σ D N = γ × Σ D N − 1 + η × D N, wherein ∑D denotes a present calculation value of the evaluation value, ∑D(N - 1) denotes an immediately preceding calculation value of the evaluation value, γ is an attenuation coefficient, and η is a correction coefficient. a vehicle drive apparatus configured to receive electricity to generate vehicle drive power and to generate electricity; a secondary battery configured to receive electricity from the vehicle drive apparatus and to output electricity to the vehicle drive apparatus; a current sensor configured to detect an electric current input into the secondary battery or an electric current output from the secondary battery; and an electronic control unit configured to control charging and discharging of the secondary battery above a lower limit capacity, wherein the electronic control unit is configured to calculate an evaluation value indicating a degree of deterioration of the secondary battery due to non-uniformity in salt concentration in the secondary battery caused by charging and discharging of the secondary battery, wherein the evaluation value is an integrated value of damage quantities of the secondary battery calculated in a prescribed cycle, which are based on the detected electric current and the prescribed cycle, and the electronic control unit is configured to execute control of raising the lower limit capacity of the secondary battery when the evaluation value reaches a prescribed threshold, characterized in that: the electronic control unit is configured to calculate a damage quantity of the secondary battery in the prescribed cycle by the following expression: D N = D N − 1 − α × Δ t × D N − 1 + β / C × I × Δ t, wherein D denotes a present calculation value of a damage quantity D, D(N - 1) denotes an immediately preceding calculation value of a damage quantity D, α is a forgetting coefficient corresponding to a diffusion velocity of ions in the electrolytic solution of the secondary battery, Δt is the prescribed cycle, β is a current coefficient, C denotes a limit threshold, and I denotes the detected electric current, and the electronic control unit is configured to calculate the evaluation value in the prescribed cycle by the following expression: Σ D N = γ × Σ D N − 1 + η × D N, wherein ∑D denotes a present calculation value of the evaluation value, ∑D(N - 1) denotes an immediately preceding calculation value of the evaluation value, γ is an attenuation coefficient, and η is a correction coefficient. the electronic control unit is configured to calculate a damage quantity of the secondary battery in the prescribed cycle by the following expression: D N = D N − 1 − α × Δ t × D N − 1 + β / C × I × Δ t, wherein D denotes a present calculation value of a damage quantity D, D(N - 1) denotes an immediately preceding calculation value of a damage quantity D, α is a forgetting coefficient corresponding to a diffusion velocity of ions in the electrolytic solution of the secondary battery, Δt is the prescribed cycle, β is a current coefficient, C denotes a limit threshold, and I denotes the detected electric current, and the electronic control unit is configured to calculate the evaluation value in the prescribed cycle by the following expression: Σ D N = γ × Σ D N − 1 + η × D N, wherein ∑D denotes a present calculation value of the evaluation value, ∑D(N - 1) denotes an immediately preceding calculation value of the evaluation value, γ is an attenuation coefficient, and η is a correction coefficient.