A control device (DC) for an electric circuit (CE) comprising a current generator (GC) connected in parallel respectively to a first electric energy store (SE1), to a consumption network (RA1), and to a converter (CV) of the DC/DC switching type, the converter being located between said first electric energy store (SE1) and said consumption network (RA1), and being connected in series to a second electric energy store (SE2), characterized in that it comprises : i) an interruption module (MI) suitable for being connected in series between, on the one hand, the said current generator (GC) and the said first electrical energy store (SE1) and, on the other hand, the said converter (CV) and the said consumption network (RA1), and comprising at least two interruption means (Mlk) on the one hand, each comprising at least one main switch (IP) with at least three states, of which at least one intermediate state is partially conductive, and a diode (DI) connected in parallel, and, on the other hand, connected in series with the said diodes (DI) connected in opposite ways, and ii) control means (MC) arranged to control the placement of at least one of said main switches (IP) in an intermediate state in a case where said converter (CV) is in a recharging mode of said second electrical energy storage device (SE2) and where a voltage measurement V2 at the terminals of said consumer network (RA1) is greater than a voltage limitation setpoint at the terminals of said consumer network (RA1), a control of the voltages of said main switches (IP) being determined as a function of a control of at least one power switch of the converter (CV) and in that said control means (MC) are arranged, when each main switch (IP) has several intermediate states, to control the placements of at least one of said main switches (IP) in successive states as a function of a predefined law suitable for inducing a decrease in the voltage V2 across said consumption network (RA1) as long as said voltage measurement V2 across said consumption network (RA1) is greater than said voltage limitation setpoint across said consumption network (RA1). i) an interruption module (MI) suitable for being connected in series between, on the one hand, the said current generator (GC) and the said first electrical energy store (SE1) and, on the other hand, the said converter (CV) and the said consumption network (RA1), and comprising at least two interruption means (Mlk) on the one hand, each comprising at least one main switch (IP) with at least three states, of which at least one intermediate state is partially conductive, and a diode (DI) connected in parallel, and, on the other hand, connected in series with the said diodes (DI) connected in opposite ways, and ii) control means (MC) arranged to control the placement of at least one of said main switches (IP) in an intermediate state in a case where said converter (CV) is in a recharging mode of said second electrical energy storage device (SE2) and where a voltage measurement V2 at the terminals of said consumer network (RA1) is greater than a voltage limitation setpoint at the terminals of said consumer network (RA1), a control of the voltages of said main switches (IP) being determined as a function of a control of at least one power switch of the converter (CV) <EOS>