Method for the controlled connection of a plurality of on-board power system branches of a vehicle, control unit for carrying out the method and on-board power system

A method for controlling power distribution among a plurality of on-board power system branches of an on-board power system of a vehicle, the method comprising:

• monitoring the supply state in a first on-board power system branch or in a third on-board power system branch;
• in response to a critical supply state occurring in the first or third on-board power system branch:
• disconnecting the first on-board power system branch from the third on-board power system branch by opening a first switching device, and
• after the first switching device has been opened, connecting a second on-board power system branch to the third on-board power system branch by closing a second switching device,
• wherein the first switching device is driven by a first drive device, and
• wherein the second switching device is driven by a second drive device that receives a switch state signal from the first drive device, wherein the second drive device drives the second switching device for closing only if the switch state signal signals an open first switching device;
• the first drive device is driven by a switching signal;
• the switching signal is output to the first drive device from a state memory;
• an authorization signal is furthermore output to the second drive device from the state memory;
• and
• the second drive device drives the second switching device for closing only if the switch state signal signals the open first switching device and the authorization signal signals an authorization being present,
• wherein the state memory outputs the switching signal for opening the first switching device and the authorization signal for closing the second switching device only if an enable signal is present at the state memory, wherein the enable signal is output in the form of a binary SET signal.