Method and device for adjusting model parameters of an electrochemical battery model of a device battery during a charging process

An apparatus comprising a data processing device configured to:

• provide (S1) a temporal operating variable profile of a plurality of operating variables for a time period;
• model (S2) a profile of at least one of the operating variables using an electrochemical battery model of a device battery (41) based on at least one operating variable of the provided operating variable profile within the time period, wherein the electrochemical battery model is designed to indicate a relationship between operating variables of an operating variable profile depending on an internal battery state determined by model parameters for the purposes of functional monitoring of the battery device (41);
• determine (S3) one or more operating states of the device battery to be checked at times when a deviation of the at least one modeled operating variable from the corresponding operating variable of the operating variable profile provided by more than one threshold value, is determined during the time period;
• perform (S6) a charging process with a constant charging current or a constant charging voltage, wherein, in the presence of the one or more operating states, a transient current pulse or a transient voltage pulse of a specified height and a specified duration is superimposed on the constant charging current or the constant charging voltage while a further temporal operating variable profile of the plurality of operating variables is captured, wherein the further temporal operating variable profile simulates a semi-dynamic operation of the device battery;
• and
• adjust (S8) the at least one model parameter of the electrochemical battery model based on the further temporal operating variable profile.

A non-transitory computer-readable medium including instructions executable by a data processing device to perform a set of functions, the set of functions comprising:

• providing (S1) a temporal operating variable profile of a plurality of operating variables for a time period;
• modeling (S2) a profile of at least one of the operating variables using an electrochemical battery model of a device battery (41) based on at least one operating variable of the provided operating variable profile within the time period, wherein the electrochemical battery model is designed to indicate a relationship between operating variables of an operating variable profile depending on an internal battery state determined by model parameters for the purposes of functional monitoring of the battery device (41);
• determining (S3) one or more operating states of the device battery to be
• checked, at times when a deviation of the at least one modeled operating variable from the corresponding operating variable of the operating variable profile provided by more than one threshold value, is determined during the time period;
• performing (S6) a charging process with a constant charging current or a constant charging voltage, wherein, in the presence of the one or more operating states, a transient current pulse or a transient voltage pulse of a specified height and a specified duration is superimposed on the constant charging current or the constant charging voltage while a further temporal operating variable profile of the plurality of operating variables is captured, wherein the further temporal operating variable profile simulates a semi-dynamic operation of the device battery;
• and
• adjusting (S8) the at least one model parameter of the electrochemical battery model based on the further temporal operating variable profile.