US 12,103,428 B2
Method for management of an energy storage system of a vehicle
Martin Byrhult, Gothenburg (SE); Jonas Hellgren, Gothenburg (SE); and Hanna Bryngelsson, Gothenburg (SE)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Appl. No. 17/431,305
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
PCT Filed Feb. 15, 2019, PCT No. PCT/EP2019/053874
§ 371(c)(1), (2) Date Aug. 16, 2021,
PCT Pub. No. WO2020/164742, PCT Pub. Date Aug. 20, 2020.
Prior Publication US 2022/0161682 A1, May 26, 2022
Int. Cl. B60L 58/12 (2019.01); B60L 50/60 (2019.01); B60L 58/24 (2019.01); H01M 10/48 (2006.01)
CPC B60L 58/12 (2019.02) [B60L 50/60 (2019.02); B60L 58/24 (2019.02); H01M 10/486 (2013.01); B60L 2240/545 (2013.01); H01M 2220/20 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for determining an operational parameter indicative of the power capability of an energy storage system (ESS) of a vehicle, wherein the method comprises the steps of:
determining a state temperature of the ESS;
determining a first acceptable temperature increase of the ESS for a given time period from the determined state temperature of the ESS to a maximum temperature threshold of the ESS being defined by a safety temperature level (Tmax safety) of the ESS, and further determining a second acceptable temperature increase of the ESS for the given time period from the determined state temperature of the ESS to a maximum temperature threshold being defined by an operational life time temperature level (Tmax degrading) of the ESS, wherein the operational life time temperature level is based on the charge and discharge activity of the battery, and wherein the operational life time temperature level is lower than the safety temperature level;
determining a first maximum operational power level of the ESS for the given time period based on the determined first acceptable temperature increase of the ESS and further determining a second maximum operational power level of the ESS for the given time period based on the determined second acceptable temperature increase of the ESS; selecting the determined first maximum operational power level of the ESS if the maximum temperature threshold is the ESS safety temperature level or selecting the determined second maximum operational power level of the ESS if the maximum temperature threshold is the ESS operational life time temperature level; and controlling a temperature of the ESS based on the selected maximum operational power level of the ESS.