Method for controlling an energy storage device that comprises: n output connectors (1a, 1b, 1c), wherein n ≥ 2, for the purpose of providing a supply voltage at each of the output connectors (1a, 1b, 1c), and n energy supply branches that are coupled in each case to one of the output connectors (1a, 1b, 1c), wherein each of the energy supply branches comprises several series-connected energy storage modules that in each case comprise: an energy storage cell module that comprises at least one energy storage cell (5a, 5k), and a coupling device having coupling elements (7a, 7b, 7c, 7d) in a full bridge circuit, which coupling elements are designed so as to selectively connect the energy storage cell module into the respective energy supply branch or bridge said energy storage cell module, wherein the method comprises the steps: of generating a first pulse width modulated control signal for a number k of energy storage modules at least of one first energy supply branch for the purpose of controlling the coupling devices of the respective energy storage modules by means of comparing a first desired value signal (x SU) with a number of 2k first periodic reference signals (x R) that comprise a pulse period T, which periodic reference signals that in each case comprise a phase shift of T/2k with respect to adjacent first reference signals (x R); and of generating a second pulse width modulated control signal for a number k of energy storage modules one at least of second energy supply branch for the purpose of controlling the coupling devices of the respective energy storage modules by means of comparing a second desired value signal (x SV; x SW) with a number of 2k second periodic reference signals (x R) that comprise the pulse period T, which periodic reference signals in each case comprise a phase shift of T/2k with respect to adjacent second reference signals (x R), characterized by determining for each of the energy supply branches whether the pulse width modulated control signal of the energy supply branch is at a logic "high" potential or a logic "low" potential at the beginning of a partial pulse period of the duration T/2k and based on said determining, displacing a reference signal system of second reference signals (x R) of an energy supply branch by a phase shift of T/4k with respect to a reference signal system of first reference signals (x R) of an energy supply branch which remains unchanged, such that the first switching process in the energy supply branches occurs in a uniform manner from the high output voltage to the low output voltage or in a uniform manner from the low output voltage to the high output voltage. an energy storage cell module that comprises at least one energy storage cell (5a, 5k), and a coupling device having coupling elements (7a, 7b, 7c, 7d) in a full bridge circuit, which coupling elements are designed so as to selectively connect the energy storage cell module into the respective energy supply branch or bridge said energy storage cell module, of generating a first pulse width modulated control signal for a number k of energy storage modules at least of one first energy supply branch for the purpose of controlling the coupling devices of the respective energy storage modules by means of comparing a first desired value signal (x SU) with a number of 2k first periodic reference signals (x R) that comprise a pulse period T, which periodic reference signals that in each case comprise a phase shift of T/2k with respect to adjacent first reference signals (x R); and of generating a second pulse width modulated control signal for a number k of energy storage modules one at least of second energy supply branch for the purpose of controlling the coupling devices of the respective energy storage modules by means of comparing a second desired value signal (x SV; x SW) with a number of 2k second periodic reference signals (x R) that comprise the pulse period T, which periodic reference signals in each case comprise a phase shift of T/2k with respect to adjacent second reference signals (x R), characterized by determining for each of the energy supply branches whether the pulse width modulated control signal of the energy supply branch is at a logic "high" potential or a logic "low" potential at the beginning of a partial pulse period of the duration T/2k and based on said determining, displacing a reference signal system of second reference signals (x R) of an energy supply branch by a phase shift of T/4k with respect to a reference signal system of first reference signals (x R) of an energy supply branch which remains unchanged, such that the first switching process in the energy supply branches occurs in a uniform manner from the high output voltage to the low output voltage or in a uniform manner from the low output voltage to the high output voltage.