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Abstract

A method for determining an ageing function of an accumulator, the ageing function representing a variation in the capacity or resistance of the accumulator, as a function of variables representative of the operation of the accumulator, the method including carrying out a plurality of experimental cycles of charging and discharging a test accumulator, each cycle being parameterised by accumulator operating parameters that vary as a function of time during the various cycles; b) during experimental cycles, determining experimental data, including a value of each variable parameter, and determining the capacity or the resistance; c) on the basis of the experimental data resulting from b), determining the ageing function of the accumulator; wherein in step a), the variable parameters include the state of charge and a depth of discharge, such that, following step c), the variables of the ageing function with the state of charge and the depth of discharge.

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