Method for operating drive unit of motor vehicle, involves removing battery only until reaching or falling below target charge level by instantaneous charge level of electrical energy during normal operation for operating electric machine

摘要

The method involves removing a battery only until reaching or falling below a target charge level by an instantaneous charge level of electrical energy during normal operation for operating the electric machine. The target charge level corresponds a minimum charge level in the normal operation and is set to a smaller value than the minimum charge level or the target charge level is selected greater than the minimum charge level in the normal operation. The internal combustion engine is started when the instantaneous charge level is less than or equal to the target charge level.