Abstract: An electrical circuit for a vehicle high-voltage network, the network including two electrical stores. The circuit includes first and second connection points for electrical connection to a load and/or charging device, a first switch between a first pole connector, for electrical contacting a first pole of a first electrical store, and the first connection point, a second switch between a second pole connector, for electrical contacting a second pole of a second electrical store, and the second connection point, a third switch between the first pole connector and a third pole connector, for electrical contacting a first pole of the second electrical store, and a fourth switch between the second pole connector and a fourth pole connector, for electrical contacting a second pole of the first electrical store. The switches are switchable between connecting and separating states. The first and/or second switches galvanically separate in the separating state.

Abstract: A method for determining an aging state of at least one cell of a battery. The method includes the step receiving a large amount of operating data relating to the at least one cell of the battery via a memory unit, wherein the operating data can be assigned to a specific point in time. The received operating data is stored in the memory unit with a timestamp which corresponds to the respectively assigned point in time. An aging state of the at least one cell of the battery is calculated using a processor while interdependently taking into account multiple operating data having a common timestamp. The method makes it possible to estimate an aging state using a multidimensional database.

Abstract: A method and a device includes a first accumulator apparatus and a second accumulator apparatus. The device includes a control apparatus that is configured so as, depending on a first state of charge of the first accumulator apparatus and/or on a second state of charge of the second accumulator apparatus, to selectively either operate the first accumulator apparatus and the second accumulator apparatus in a series connection between a first terminal and a second terminal in order to supply power to a vehicle at a first supply voltage, or, in order to supply power to a vehicle by way of the second accumulator apparatus at a second supply voltage, to electrically disconnect the first accumulator apparatus from the first terminal and/or from the second terminal.

Abstract: A method and a device includes a first accumulator apparatus and a second accumulator apparatus. The device includes a control apparatus that is configured so as, depending on a first state of charge of the first accumulator apparatus and/or on a second state of charge of the second accumulator apparatus, to selectively either operate the first accumulator apparatus and the second accumulator apparatus in a series connection between a first terminal and a second terminal in order to supply power to a vehicle at a first supply voltage, or, in order to supply power to a vehicle by way of the second accumulator apparatus at a second supply voltage, to electrically disconnect the first accumulator apparatus from the first terminal and/or from the second terminal.