US 12,473,148 B2
Electric vehicle and method for operating an electric vehicle
Matthias Hauck, Schwetzingen (DE); Christian Lampert, Karlsdorf-Neuthard (DE); and Michal Fiala, Aalen (DE)
Assigned to SEW-EURODRIVE GMBH & CO. KG, Bruchsal (DE)
Appl. No. 17/922,658
Filed by SEW-EURODRIVE GMBH & CO. KG, Bruchsal (DE)
PCT Filed Apr. 14, 2021, PCT No. PCT/EP2021/059703
§ 371(c)(1), (2) Date Nov. 1, 2022,
PCT Pub. No. WO2021/223968, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 102020002674.5 (DE), filed on May 5, 2020.
Prior Publication US 2023/0264894 A1, Aug. 24, 2023
Int. Cl. B60L 58/20 (2019.01); B60L 50/40 (2019.01); B60L 50/60 (2019.01); B65G 1/04 (2006.01)
CPC B65G 1/0492 (2013.01) [B60L 50/40 (2019.02); B60L 50/60 (2019.02); B60L 2200/40 (2013.01); B60L 2210/10 (2013.01); B60L 2240/545 (2013.01); B60L 2240/547 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A device adapted for travel motion and/or traction of the vehicle; a first energy storage device; a second energy storage device; and a bidirectional DC converter; wherein the drive device, the DC converter, and the second energy storage device are connected to each other via a common intermediate circuit that includes an intermediate circuit voltage; wherein the first energy storage device includes a storage voltage and is connected to the intermediate circuit via the DC converter; wherein the drive device is adapted to be supplied with drive energy by the first energy storage device and/or by the second energy storage device via the intermediate circuit; and wherein the DC converter is adapted to convert the intermediate circuit voltage into the storage voltage in a first converter direction to charge the first energy storage device and is adapted to convert the storage voltage into the intermediate circuit voltage in a second converter direction to discharge the first energy storage device, the first converter direction being activated during charging of the second energy storage device, the first converter direction being deactivated during discharging of the second energy storage device;
further comprising a power supply unit connected to the intermediate circuit adapted to supply energy to the intermediate circuit; wherein the power supply unit includes a regulated voltage source and a first voltage regulator, an output DC voltage being regulatable to a specified value for the output DC voltage; wherein the specified value is less than or equal to a maximum intermediate circuit voltage value.