Patent Document ID: 20150323611
Application ID: 14650932
Patent Flag: 0

Claim One:
1. A life prediction apparatus for an electrical storage device, comprising: an actual operation controller that controls operation of the electrical storage device, an actual operation data collector that collects measurement data on the electrical storage device which is being operated, a degradation state determiner that determines a degradation state of the electrical storage device on the basis of the measurement data collected by the actual operation data collector, and a life predictor that predicts a life of the electrical storage device, wherein the life predictor includes: an operation controller for life prediction that controls operation of the electrical storage device individually with respect to a plurality of different operation conditions on the basis of operation conditions that have been set in advance in relation to a plurality of factors affecting an evaluation characteristic which is to be used for calculating the life of the electrical storage device; a data collector that collects measurement data for each of the plurality of different operation conditions by performing operation control with the operation controller for life prediction by using the plurality of operation conditions, calculates the evaluation characteristic on the basis of the collected measurement data, and successively accumulates the calculated evaluation characteristics as time variation data in a storage device; a data analyzer that creates a regression formula representing a relationship between the evaluation characteristic and an operation time with respect to each of the plurality of operation conditions by curve fitting, with an appropriate approximation function, each of the time variation data relating to the evaluation characteristics and accumulated in the storage device by the data collector; and a life prediction formula creator that creates a life prediction formula for calculating a predicted value of the evaluation characteristic when operation conditions, which have been randomly set as the plurality of factors, are used, on the basis of the regression formula created by the data analyzer, wherein the operation controller for life prediction uses, as the plurality of operation conditions, operation conditions which have been set with respect to the plurality of factors on the basis of an orthogonal array table, and controls the operation of the electrical storage device; and the life prediction formula creator creates the life prediction formula by fitting into an approximation formula, on the basis of a plurality of the regression formulas created on the basis of the plurality of operation conditions for which operation control has been performed according to the orthogonal array table.