US 12,263,739 B2
Method of operating an electric vehicle and electric vehicle
Matthias Hauck, Schwetzingen (DE); Patrick Weis, Wössingen (DE); and Gero Bockelmann, Bruchsal (DE)
Assigned to SEW-EURODRIVE GMBH & CO. KG, Bruchsal (DE)
Appl. No. 17/787,635
Filed by SEW-EURODRIVE GMBH & CO. KG, Bruchsal (DE)
PCT Filed Dec. 2, 2020, PCT No. PCT/EP2020/025558
§ 371(c)(1), (2) Date Jun. 21, 2022,
PCT Pub. No. WO2021/121655, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 102019008788.7 (DE), filed on Dec. 18, 2019.
Prior Publication US 2022/0410725 A1, Dec. 29, 2022
Int. Cl. B60L 15/28 (2006.01); B60L 50/40 (2019.01); B60L 53/30 (2019.01); H02J 7/34 (2006.01)
CPC B60L 15/28 (2013.01) [B60L 50/40 (2019.02); B60L 53/32 (2019.02); H02J 7/345 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method for operating an electric vehicle that includes a first energy storage device, a second energy storage device, an energy supply unit adapted to provide energy to charge the first energy storage device and/or the second energy storage device, and a first electrical consumer connected to the second energy storage device via an intermediate circuit, the first energy storage device being connected to the energy supply unit via a bidirectional converter unit, the second energy storage device being connected to the energy supply unit, comprising:
delivering a first power flow from the first energy storage device to the second energy storage device in response to an intermediate circuit voltage in the intermediate circuit falling below a predefinable voltage; and
preventing a second power flow from the second energy storage device to the first energy storage device at all times.