US 12,337,726 B2
Method and device for providing a storage capacity reserve in a traction battery for imminent downhill drive
Philipp Wagner, Munich (DE); Christian Haupt, Munich (DE); and Julius Engasser, Munich (DE)
Assigned to MAN Truck & Bus SE, Munich (DE)
Appl. No. 18/266,494
Filed by MAN Truck & Bus SE, Munich (DE)
PCT Filed Dec. 8, 2021, PCT No. PCT/EP2021/084796
§ 371(c)(1), (2) Date Jun. 9, 2023,
PCT Pub. No. WO2022/122820, PCT Pub. Date Jun. 16, 2022.
Claims priority of application No. 10 2020 133 118.5 (DE), filed on Dec. 11, 2020.
Prior Publication US 2024/0025265 A1, Jan. 25, 2024
Int. Cl. H01M 8/04858 (2016.01); B60L 7/18 (2006.01); B60L 7/22 (2006.01); B60L 53/66 (2019.01); B60L 58/13 (2019.01)
CPC B60L 7/22 (2013.01) [B60L 7/18 (2013.01); B60L 53/66 (2019.02); B60L 58/13 (2019.02); B60L 2200/36 (2013.01); B60L 2240/642 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for providing a storage capacity reserve in a traction battery for an electrically driven motor vehicle for an upcoming downhill drive, comprising the steps:
a) detecting whether an electrical charging operation of the traction battery by means of an external charging source is imminent;
b) determining one or more possible downhill routes for an upcoming downhill drive after the electric charging operation;
c) predicting one or more amounts of recuperated energy recuperated by the motor vehicle along each of the determined downhill routes; and
d) determining a maximum battery state of charge of the traction battery for the charging operation by means of the external charging source depending on the predicted amounts of recuperated energy,
wherein a lower limit value, for example 15%, and an upper limit value, for example 85%, are defined for the battery state of charge of the traction battery in order to optimize the service life of the traction battery, wherein falling below the lower limit value and/or exceeding the upper limit value is only permissible in predetermined exceptional situations, and
wherein an exceptional situation in which exceeding the upper limit value is permissible is present if it is determined, on the basis of topography data, that a route section on which more electrical energy is consumed than is recuperated is reached within a predetermined time and/or distance, wherein the upper limit value is again undershot.