Patent ID: 9463708
Filing Date: 2016-10-11
CPC Classification: B60L,Y02T

Claim Text:
1. A method for operating an electric traction drive system, comprising: monitoring each of a plurality of battery modules of a battery during operation of the traction drive system to detect a technical fault in one of the plurality of battery modules of the battery, the battery having a battery module line that provides a battery output voltage that supplies an electric motor and, each of the plurality of battery modules having at least one battery cell, each of the plurality of battery modules being configured to be connected in series with the battery module line or bypassed in the battery module line; bypassing at least one battery module of the plurality of battery modules if a technical fault of the at least one battery module is detected during the monitoring; operating the traction drive system in a transition state, wherein the electric motor is supplied and actuated by first battery modules of the plurality of battery modules in the transition state to enable a currently generated torque to remain unchanged, the first battery modules being connected in the battery module line; and carrying out a battery diagnosis while the traction drive system is operated in the transition state to determine at least one of whether to continue operating the traction drive system with the at least one bypassed battery module and whether to initiate safety-relevant measures.