Patent ID: 11904724
Assignee: VOLVO TRUCK CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  G  H  Y | IPC B  G  H

Claim 11:
12. An electrical propulsion system for a vehicle, the electrical propulsion system comprising:
an electrical motor for providing power to the vehicle;
an electrical energy storage system connected to the electrical motor to provide power to the electrical motor, the electrical energy storage system having a number of battery units comprising a number of battery cells a control unit for estimating an operating parameter of at least one battery cell, the operating parameter being indicative of one of capacity and impedance of the battery cell, the control unit being configured to select at least one battery cell in the at least one battery unit, provide a set of state-of-charge (SOC) estimators, each SOC estimator having a selected operating parameter value for a given time period; and
wherein the control unit is further configured to use the set of SOC estimators to determine a value of the operating parameter of the battery cell by voltage error minimization.