Abstract: An electrical on-board power system for an electrically driven transportation vehicle having a traction battery with a first battery terminal and a second battery terminal, a first current path between the first battery terminal and a first terminal, and a second current path between the second battery terminal and a second terminal. An electrical or electromagnetic first switch is connected in the first current path and an electrical or electromagnetic second switch is connected in the second current path. The on-board power system has a DC-to-DC voltage converter connected at output to a low-voltage system, wherein a first input of the DC-to-DC voltage converter is connected to a first tap in the first current path and the first switch, and a second input of the DC-to-DC voltage converter is connected to a second tap between the second switch and the second load terminal.

Abstract: An electrical on-board power system for an electrically driven transportation vehicle having a traction battery with a first battery terminal and a second battery terminal, a first current path between the first battery terminal and a first terminal , and a second current path between the second battery terminal and a second terminal . An electrical or electromagnetic first switch is connected in the first current path and an electrical or electromagnetic second switch is connected in the second current path. The on-board power system has a DC-to-DC voltage converter connected at output to a low-voltage system, wherein a first input of the DC-to-DC voltage converter is connected to a first tap in the first current path and the first switch, and a second input of the DC-to-DC voltage converter is connected to a second tap between the second switch and the second load terminal.

Abstract: A motor vehicle electrical system having a starter and a first energy store, which are arranged in a first region of the motor vehicle electrical system, and a generator and a second energy store, which are arranged in a second region of the motor vehicle electrical system, wherein, a switching element is arranged between the first and the second region of the motor vehicle electrical system, wherein the switching element has at least two switching states, wherein, in a first switching state, a current can flow only from the first region toward the second region and, in a second switching state, the first and second region have a through-connection to one another, wherein the second energy store is connected to the generator via a DC/DC converter, wherein, via a second switching element, the starter is connected directly to the second energy store.

Abstract: A motor vehicle electrical system, wherein a control unit senses or detects a start-stop command for the internal combustion engine, wherein when a start-stop command is sensed or detected a switching element is switched into the first switching state and the voltage at the DC/DC output, which is connected to the switching element, is increased by a control unit by means of a control command, wherein a measuring unit senses and evaluates the voltage condition over the switching element, wherein depending upon the evaluation the start-stop command is or is not carried out by a control unit using a control command. Also disclosed is a method for operating a motor vehicle electrical system.

Abstract: A motor vehicle electrical system, wherein a control unit senses or detects a start-stop command for the internal combustion engine, wherein when a start-stop command is sensed or detected a switching element is switched into the first switching state and the voltage at the DC/DC output, which is connected to the switching element, is increased by a control unit by means of a control command, wherein a measuring unit senses and evaluates the voltage condition over the switching element, wherein depending upon the evaluation the start-stop command is or is not carried out by a control unit using a control command Also disclosed is a method for operating a motor vehicle electrical system.

Abstract: A motor vehicle electrical system having a starter and a first energy store, which are arranged in a first region of the motor vehicle electrical system, and a generator and a second energy store, which are arranged in a second region of the motor vehicle electrical system, wherein, a switching element is arranged between the first and the second region of the motor vehicle electrical system, wherein the switching element has at least two switching states, wherein, in a first switching state, a current can flow only from the first region toward the second region and, in a second switching state, the first and second region have a through-connection to one another, wherein the second energy store is connected to the generator via a DC/DC converter, wherein, via a second switching element, the starter is connected directly to the second energy store.