US 12,319,146 B2
Onboard electrical system for a vehicle, vehicle including an onboard electrical system, and method for operating an onboard electrical system for a vehicle
Urs Boehme, Ehningen (DE); Franz Pfeilschifter, Regensburg (DE); Markus Orner, Renningen (DE); Andreas Maier, Uhingen (DE); Florian Fahrner, Rottenburg (DE); and Stefan Seiffert, Filderstadt (DE)
Assigned to MERCEDES-BENZ GROUP AG, Stuttgart (DE); and VITESCO TECHNOLOGIES GMBH, Regensburg (DE)
Appl. No. 18/555,165
Filed by Mercedes-Benz Group AG, Stuttgart (DE); and Vitesco Technologies GmbH, Regensburg (DE)
PCT Filed Apr. 13, 2022, PCT No. PCT/EP2022/059837
§ 371(c)(1), (2) Date Oct. 12, 2023,
PCT Pub. No. WO2022/219023, PCT Pub. Date Oct. 20, 2022.
Claims priority of application No. 10 2021 109 442.9 (DE), filed on Apr. 15, 2021.
Prior Publication US 2024/0208332 A1, Jun. 27, 2024
Int. Cl. B60L 1/00 (2006.01); B60L 50/60 (2019.01); B60L 53/16 (2019.01); H02M 1/10 (2006.01); H02M 1/32 (2007.01)
CPC B60L 1/00 (2013.01) [B60L 50/60 (2019.02); B60L 53/16 (2019.02); H02M 1/10 (2013.01); H02M 1/32 (2013.01); B60L 2210/10 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An onboard electrical system for a vehicle, comprising:
a first onboard electrical sub-system for an electric drive unit of the vehicle;
a second onboard electrical sub-system for electric components of the vehicle different from the electric drive unit;
a third onboard electrical sub-system for a vehicle battery of the vehicle; and
a charging terminal for providing a charging voltage of a power source,
wherein a changeover switch, a first switch element and a second switch element of the onboard electrical system are physically separated from each other,
wherein the second onboard electrical sub-system is galvanically connected either to the first onboard electrical sub-system or to the charging terminal by the changeover switch,
wherein during an electric charging mode of the vehicle battery, the charging terminal is galvanically connected to the third onboard electrical sub-system by the first switch element and to the second onboard electrical sub-system by the changeover switch, and the first onboard electrical sub-system is galvanically separated from the third onboard electrical sub-system by the second switch element and from the second onboard electrical sub-system by the changeover switch,
wherein during a driving mode of the vehicle, the charging terminal is galvanically separated from the third onboard electrical sub-system by the first switch element and from the second onboard electrical sub-system by the changeover switch, and the first onboard electrical sub-system is galvanically connected to the third onboard electrical sub-system by the second switch element and to the second onboard electrical sub-system by the changeover switch,
wherein the second onboard electrical sub-system is connected to the changeover switch by two potential lines and at least one of the two potential lines comprises a semiconductor fuse,
wherein the semiconductor fuse and the changeover switch together form a hybrid switching device, whereby the changeover switch is switchable load-free and the second onboard electrical sub-system is protected from a short circuit by the hybrid switching device,
wherein a battery voltage is provided by the vehicle battery, and the charging voltage is provided by the charging terminal,
wherein during the electric charging mode of the vehicle battery, the vehicle battery and the second onboard electrical sub-system are supplied with the charging voltage of the charging terminal, and
wherein during the driving mode of the vehicle, the first onboard electrical sub-system and the second onboard electrical sub-system are supplied with the battery voltage.