Method and Devices for Making Available Information for the Purpose of Performing Maintenance and Servicing of a Battery Unit

A battery management system comprising:

• a detecting unit configured to detect useful data of a battery unit;
• a quantizing unit configured to quantize the detected useful data;
• and
• a histogram unit configured to generate at least one current histogram and at least one aggregated histogram from histograms,
• wherein the histograms have frequencies of the occurrence of specific values of the individual useful data items or values derived therefrom.

A battery comprising:

• a plurality of battery cells;
• and
• a battery management system including (i) a detecting unit configured to detect useful data of the battery, (ii) a quantizing unit configured to quantize the detected useful data, and (iii) a histogram unit configured to generate at least one current histogram and at least one aggregated histogram from histograms,
• wherein the histograms have frequencies of the occurrence of specific values of the individual useful data items or values derived therefrom, and
• wherein the battery is configured to be connected to a drive system of a motor vehicle.