Abstract: The invention concerns a device (3) for synchronizing at least two DC/DC converters. It is characterized in that it comprises receiving means (21A, 21B, 23A, 23B) for receiving a switching signal generated by each of the converters; means (25) for detecting a transition type of the received switching signals; means (27) for generating a synchronization signal when a transition is detected; and means (27, S1, S2) for supplying the synchronization signal to one of the converters, said means (27, S1, S2) being configured to supply the synchronization signal to a different converter and in an order of succession each time a transition is detected.

Abstract: The invention relates to a power supply unit (3) for supplying power to an on-board electrical network of a vehicle, including: at least two DC-to-DC converters (9A, 9B) which are interleaved and reversible between an opera-ting mode for lowering voltage and an operating mode for raising voltage, the converters (9A, 9B) being intended for being connected to a power storage device (ST2) and being capable of supplying current to the on-board network; and a switch (K) enabling a power source (STI) to supply power to the on-board network when the switch (K) is in a first state, and enabling the power storage device (ST2) to supply power to the on-board network when the switch (K) is in a second state.

Abstract: The invention concerns a method for managing a system for supplying a vehicle electrical system with electrical energy, comprising the steps consisting of: •supplying the electrical system with electrical energy via the additional electrical energy storage device and the DC/DC converter when the switch is open; •regulating the electrical energy generator to supply voltage lower than that imposed by the DC/DC converter and higher than a voltage of the electrical energy storage device; •closing the switch such that the DC/DC converter imposes a voltage on the electrical system that is higher than that of the electrical energy storage device and the electrical energy generator; •applying a voltage to the electrical system from the electrical energy generator that is higher than that of the DC/DC converter; and deactivating the DC/DC converter.

Abstract: The invention relates to a power supply unit (3) for supplying power to an on-board electrical network of a vehicle, including: at least two DC-to-DC converters (9A, 9B) which are interleaved and reversible between an opera- ting mode for lowering voltage and an operating mode for raising voltage, the converters (9A, 9B) being intended for being connected to a power storage device (ST2) and being capable of supplying current to the on-board network; and a switch (K) enabling a power source (STI) to supply power to the on-board network when the switch (K) is in a first state, and enabling the power storage device (ST2) to supply power to the on-board network when the switch (K) is in a second state.

Abstract: The invention concerns a method for managing a system for supplying a vehicle electrical system with electrical energy, comprising the steps consisting of:•supplying the electrical system with electrical energy via the additional electrical energy storage device and the DC/DC converter when the switch is open;•regulating the electrical energy generator to supply voltage lower than that imposed by the DC/DC converter and higher than a voltage of the electrical energy storage device;•closing the switch such that the DC/DC converter imposes a voltage on the electrical system that is higher than that of the electrical energy storage device and the electrical energy generator;•applying a voltage to the electrical system from the electrical energy generator that is higher than that of the DC/DC converter; and deactivating the DC/DC converter.

Abstract: The invention concerns a device (3) for synchronizing at least two DC/DC converters. It is characterized in that it comprises receiving means (21A, 21B, 23A, 23B) for receiving a switching signal generated by each of the converters; means (25) for detecting a transition type of the received switching signals; means (27) for generating a synchronization signal when a transition is detected; and means (27, S1, S2) for supplying the synchronization signal to one of the converters, said means (27, S1, S2) being configured to supply the synchronization signal to a different converter and in an order of succession each time a transition is detected.

Abstract: The invention relates to a system for powering a vehicle with a heat engine and provided with an automatic stop and restart system for the heat engine, wherein said powering system comprises an onboard grid to which electric consumers are connected, means (16) for starting/restarting the engine, a battery (11) powering the onboard grid and the starting/restarting means, and a DMT device (12, 15) for maintaining the voltage. According to the invention, the onboard grid (10) is connected to the battery (11) via the DMT device (12, 25), and the DMT device (12, 25) is preferably connected to the positive terminal P of the battery.

Abstract: The invention relates to an electric circuit for an automobile, that comprises a ground line (M), an onboard network (R) with a battery (1) connected to the network (R) and to the ground (M) by a branch (b1) comprising a switch (K1) and by a second branch (b2) including a switch (K2), an alternator (3) connected to the battery, a starter and consumer members (4) connected to said onboard network and to the ground. The circuit further includes a voltage holding device that comprises a bridge (b3) connecting the branch (b1) to the branch (b2) and a capacitor (2) connected to the bridge (b3) at a location between the third switch (K2) and the second branch (b2), and an internal supply device (8) that allows the current flow in the second branch (b2) only when recharging the capacitor (2).

Abstract: The invention relates to a system for powering a vehicle with a heat engine and provided with an automatic stop and restart system for the heat engine, wherein said powering system comprises an onboard grid to which electric consumers are connected, means (16) for starting/restarting the engine, a battery (11) powering the onboard grid and the starting/restarting means, and a DMT device (12, 15) for maintaining the voltage. According to the invention, the onboard grid (10) is connected to the battery (11) via the DMT device (12, 25), and the DMT device (12, 25) is preferably connected to the positive terminal P of the battery.

Abstract: The invention relates to an electric circuit for an automobile, that comprises a ground line (M), an onboard network (R) with a battery (1) connected to the network (R) and to the ground (M) by a branch (b1) comprising a switch (K1) and by a second branch (b2) including a switch (K2), an alternator (3) connected to the battery, a starter and consumer members (4) connected to said onboard network and to the ground. The circuit further includes a voltage holding device that comprises a bridge (b3) connecting the branch (b1) to the branch (b2) and a capacitor (2) connected to the bridge (b3) at a location between the third switch (K2) and the second branch (b2), and an internal supply device (8) that allows the current flow in the second branch (b2) only when recharging the capacitor (2).