Two voltage battery for a vehicle - with at least one ground connection point, - with a first connection to the vehicle electrical system, at which a low first vehicle electrical system voltage in relation to the ground connection point is made available, and - with a second connection to the vehicle electrical system, at which a high second vehicle electrical system voltage in relation to the ground connection point is made available and, - wherein three or more battery submodules (23, 24, 25) are provided which are wired in parallel to each other not only in relation to the first connection to the vehicle electrical system and the ground connection point but also to the second connection to the vehicle electrical system and the ground connection point, - wherein at least two battery cell blocks (12, 13) and a plurality of switching elements (14, 15, 16, 17, 18, 19, 20) are provided in each battery submodule (23, 24, 25) for connecting the battery cell blocks (12, 13) optionally in parallel and/or in series, - wherein in a first connection arrangement of the battery cell blocks (12, 13), the same are wired parallel to each other between the ground connection point and the first connection to the vehicle electrical system, in such a way that at the first connection to the vehicle electrical system the first vehicle electrical system voltage in relation to the ground connection point is made available, and - wherein the switching elements (14, 15, 16, 17, 18, 19, 20) in a second connection arrangement of the battery cell blocks (12, 13) are connecting the battery cell blocks (12, 13) of the battery submodules to each other in series between the first connection to the vehicle electrical system and the second connection to the vehicle electrical system such that at the second connection to the vehicle electrical system a voltage in relation to the first connection to the vehicle electrical system is made available for providing the second vehicle electrical system voltage, and - wherein the two voltage battery is set up in such a manner that when switching over the connection arrangement of the battery cell blocks (12, 13) of the battery submodules, there is always at least one battery submodule (23, 24, 25) that provides the first vehicle electrical system voltage and another battery submodule (23, 24, 25) that provides the second vehicle electrical system voltage, such that a temporary interruption in the provision of the low first vehicle electrical system voltage and the higher second vehicle electrical system voltage is avoided, wherein a voltage across all battery cell blocks (12, 13) of the battery submodule (23, 24, 25) in the second connection arrangement corresponds to the voltage between the second connection to the vehicle electrical system and the first connection to the vehicle electrical system. - with at least one ground connection point, - with a first connection to the vehicle electrical system, at which a low first vehicle electrical system voltage in relation to the ground connection point is made available, and - with a second connection to the vehicle electrical system, at which a high second vehicle electrical system voltage in relation to the ground connection point is made available and, - wherein three or more battery submodules (23, 24, 25) are provided which are wired in parallel to each other not only in relation to the first connection to the vehicle electrical system and the ground connection point but also to the second connection to the vehicle electrical system and the ground connection point, - wherein at least two battery cell blocks (12, 13) and a plurality of switching elements (14, 15, 16, 17, 18, 19, 20) are provided in each battery submodule (23, 24, 25) for connecting the battery cell blocks (12, 13) optionally in parallel and/or in series, - wherein in a first connection arrangement of the battery cell blocks (12, 13), the same are wired parallel to each other between the ground connection point and the first connection to the vehicle electrical system, in such a way that at the first connection to the vehicle electrical system the first vehicle electrical system voltage in relation to the ground connection point is made available, and - wherein the switching elements (14, 15, 16, 17, 18, 19, 20) in a second connection arrangement of the battery cell blocks (12, 13) are connecting the battery cell blocks (12, 13) of the battery submodules to each other in series between the first connection to the vehicle electrical system and the second connection to the vehicle electrical system such that at the second connection to the vehicle electrical system a voltage in relation to the first connection to the vehicle electrical system is made available for providing the second vehicle electrical system voltage, and - wherein the two voltage battery is set up in such a manner that when switching over the connection arrangement of the battery cell blocks (12, 13) of the battery submodules, there is always at least one battery submodule (23, 24, 25) that provides the first vehicle electrical system voltage and another battery submodule (23, 24, 25) that provides the second vehicle electrical system voltage, such that a temporary interruption in the provision of the low first vehicle electrical system voltage and the higher second vehicle electrical system voltage is avoided,