Patent ID: 11951866
Assignee: BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  G  H  Y | IPC B  G  H

Claim 0:
1. A method for determining an operating temperature of a battery cell, the method comprising:
determining an external temperature of the battery cell;
determining an internal temperature of the battery cell via detecting an electrical impedance of the battery cell; and
determining an operating temperature of the battery cell from at least one of: the external temperature and the internal temperature,
wherein, in a first operating state of the battery cell the internal temperature of the battery cell is determined:
at a first frequency, if a temperature profile of the battery cell is in a predefined first safe range, and
at a second frequency greater than the first frequency, if the temperature profile is outside the predefined first safe range, and

wherein the temperature profile reflects at least one of: the external temperature, the internal temperature and the operating temperature, of the battery cell.