The invention relates to a method for the management of a battery comprising a plurality of accumulators that can be connected in series or in parallel, comprising a charge or discharge phase during which the accumulators are arranged in series, said method being characterised in that it then comprises a balancing phase comprising positioning the accumulators in parallel, during which an electrical variable G_min representing the balancing of the accumulator that has reached the maximum voltage during the charge phase or the minimum voltage during the discharge phase is measured or estimated, and during which an electrical variable G_i representing the balancing of another accumulator i of the battery is also measured or estimated, and in that the state of health SOH_i of said other accumulator i is calculated from the two electrical variables G_min and G_i and from the knowledge of the performance of the accumulator i at the beginning of the service life.