US 12,240,333 B2
Reducing switching-on and switching-off processes in an electric drivetrain
Joerg Maier, Ostfildern (DE); and Michael Kauf, Weinstadt (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/780,415
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Nov. 12, 2020, PCT No. PCT/EP2020/081843
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/104886, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 10 2019 218 454.5 (DE), filed on Nov. 28, 2019.
Prior Publication US 2023/0001795 A1, Jan. 5, 2023
Int. Cl. B60L 3/00 (2019.01); B60L 53/20 (2019.01); B60L 58/14 (2019.01); G06Q 10/083 (2023.01); G06Q 20/34 (2012.01)
CPC B60L 3/0046 (2013.01) [B60L 53/20 (2019.02); B60L 58/14 (2019.02); G06Q 10/083 (2013.01); G06Q 20/34 (2013.01); B60L 2210/40 (2013.01); B60L 2250/00 (2013.01); B60L 2260/20 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method (100) for operating a vehicle (1) having an electric drivetrain (2), wherein this electric drivetrain (2) is fed via a DC-voltage source (3) and a converter (4) for converting the DC voltage into a single-phase or polyphase AC voltage, the method comprising the following steps:
determining (110) that the vehicle (1) is parked; and
ascertaining (120), using at least one preset criterion (10), whether the vehicle (1) is likely to be parked for only a predetermined short time;
in response to ascertaining that the vehicle (1) is likely to be parked for only the predetermined short time, shifting the vehicle (1) from a drive-ready state to a blocking state (130), wherein, in the blocking state, the vehicle (1) is protected from unauthorized use, and the converter (4) is supplied the DC voltage from the DC-voltage source (3);
in response to ascertaining that the vehicle (1) is likely not to be parked for only the predetermined short time, performing (140) at least one function check on the electric drivetrain (2) which is intended to ramp down the electric drivetrain (2), and, once this function check has concluded, shifting the vehicle (1) to a switched-off state, in which the vehicle (1) is protected from unauthorized use and the supply to the converter (4) from the DC-voltage source (3) is interrupted.