Vehicle electrical system

1. A vehicle electrical system comprising:

a DC charging connection;

a rechargeable battery;

a first DC-DC converter; and

an electrical drive,

wherein the first DC-DC converter:

i) has a first side that is connected to a connecting point via a first side of a first switch,

ii) has a second side connected to:

a) the electrical drive and,

b) connected to the rechargeable battery via a second switch and either the connecting point or directly connected to the rechargeable battery, and

wherein the vehicle electrical system has a second DC-DC converter that is either connected to the first side of the first switch or connected directly to the connecting point.

2. The vehicle electrical system as claimed in claim 1 , wherein the second DC-DC converter is connected to the first side of the first DC-DC converter or is connected to the connecting point.

3. The vehicle electrical system as claimed in claim 1 , wherein the rechargeable battery is connected to the connecting point via a third switch.

4. The vehicle electrical system as claimed in claim 1 , wherein the first and the second DC-DC converter are each galvanically isolating DC-DC converters.

5. The vehicle electrical system as claimed in claim 1 , wherein a low-voltage on-board electrical system branch of the vehicle electrical system is connected to one side of the first switch via the second DC-DC converter.

6. The vehicle electrical system as claimed claim 1 , wherein the second DC-DC converter has a high-voltage side that is connected to one side of the first switch and has a low-voltage side that is connected to the low-voltage on-board electrical system branch.

7. The vehicle electrical system as claimed in claim 2 , wherein the rechargeable battery is connected to the connecting point via a third switch.

8. The vehicle electrical system as claimed in claim 1 , which also has an AC charging connection that is connected to the first side of the first DC-DC converter via a rectifier device of the vehicle electrical system.

9. The vehicle electrical system as claimed in claim 8 , wherein the AC charging connection is connected to the rectifier device via a fifth switch and the rectifier device is connected to the first side of the first DC-DC converter via the fifth switch.

10. The vehicle electrical system as claimed in claim 8 , wherein the rectifier device is in the form of a power factor correction filter.

11. The vehicle electrical system as claimed in claim 1 , wherein the DC charging connection is connected to the connecting point via a fourth switch.

12. The vehicle electrical system as claimed in claim 3 , wherein the rechargeable battery and the third switch, on the one hand, and the first switch, the second switch, the first DC-DC converter and the second DC-DC converter, on the other hand, are accommodated in different housings.

13. The vehicle electrical system as claimed in claim 1 , wherein the electrical drive is in the form of a high-voltage component and at least one further high-voltage component is connected to the second side of the first DC-DC converter.

14. The vehicle electrical system as claimed in claim 1 , wherein the second DC-DC converter has a plurality of individual converters that are connected to one side of the first switch via a configuration circuit, wherein the configuration circuit connects the individual converters in series with one another in a first configuration state and connects the individual converters in parallel with one another in a second configuration state.

15. The vehicle electrical system as claimed in claim 14 , wherein each individual converter has a DC-link capacitor that is connected to one side of the first switch via the configuration circuit, wherein the DC-link capacitors are connected in series or in parallel with one another, depending on the configuration state.