Patent ID: 9395416
Filing Date: 2016-07-19
CPC Classification: G01R

Claim Text:
1. A method for determining a state-of-charge of a battery having a battery management unit and a superimposed control unit, the battery management unit being operated in three operating modes, the method comprising: in a first operating mode, regularly sensing a battery current by means of the battery management unit; in a second operating mode, collecting information regarding the state-of-charge of the battery and determining the state-of-charge of the battery when the battery management unit is in the second operating mode and disabling at least one function that is to be performed by the battery management unit in a third operating mode, the at least one function being communication with the superimposed control unit, and in a third operating mode, sensing the battery current, determining the state-of-charge of the battery, performing a power prediction, and communicating with the superimposed control unit, wherein the battery management unit switches from the first operating mode to the second operating mode if the battery current exceeds a predetermined current threshold value, wherein the superimposed control unit is switched off in the first and the second operating modes, and wherein switching on the superimposed control unit switches the battery management unit into the third operating mode.