SECONDARY CELL SERVICE LIFE PREDICTION DEVICE, CELL SYSTEM, AND SECONDARY CELL SERVICE LIFE PREDICTION METHOD

摘要

The purpose of the present invention is to provide a secondary cell service life prediction device, a cell system, and a secondary cell service life prediction method whereby the service life of a secondary cell can be predicted with greater precision. A cell system (10) comprises a secondary cell (28) for supplying electric power to an electric power load (18), and an electric current gauge (32) and temperature gauge (34) for measuring the magnitude of factors that affect deterioration of the secondary cell (28). The cell system (10) compares the peak value of a history distribution based on the frequency of use of the secondary cell (28) according to the magnitude of the factors measured a plurality of times within a predetermined timeframe by the electric current gauge (32) and the temperature gauge (34), and the peak value of an ideal distribution based on the frequency of use of the secondary cell (28) predicted in advance in accordance with the magnitude of the factors; derives the extent of degradation of the secondary cell (28) in a state of use on the basis of the comparison result and the extent of degradation of the secondary cell (28) predicted in advance; and predicts the service life of the secondary cell (28) on the basis of the derived extent of degradation.