| 摘要 |
An object of the present invention is to provide a secondary battery lifetime prediction apparatus, a battery system and a secondary battery lifetime prediction method that allow a more accurate lifetime prediction for a secondary battery. The battery system (10) includes a secondary battery (28) that supplies power to an electric power load (18) and an ammeter (32) and a thermometer (34) that measure the level of a factor affecting the degradation of the secondary battery (28), compares the peak value of a history distribution based on a use frequency of the secondary battery (28) depending on the level of the factor that is measured multiple times in a predetermined period by the ammeter (32) and the thermometer (34) with the peak value of an ideal distribution based on a previously estimated use frequency of the secondary battery (28) depending on the level of the factor, derives a degree of the degradation of the secondary battery (28) in use based on the comparison result and a previously estimated degree of the degradation of the secondary battery (28), and predicts the lifetime of the secondary battery (28) based on the degree of the degradation derived.
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