Verfahren und Vorrichtung zur prädiktiven Diagnose einer Gerätebatterie eines technischen Geräts mithilfe eines Trace-Graph-Modells

Die Erfindung betrifft ein computer-implementiertes Verfahren zum Überwachen einer Gerätebatterie in einem technischen Gerät. A monitoring method includes ascertaining from a temporal operating variable curve of operating variables of a battery an operating feature point characterizing a battery state and/or an operating history in a time period between a most recent and a second most recent change point time in the curve, providing a trace graph model comprising nodes with respective characteristic operating feature points connected via directed transitions with respective transition probabilities. One node is an anomaly node associated with an operating feature point corresponding to a particular fault of the battery. The ascertained operating feature point is assigned to one of the nodes as a monitoring node. An overall probability of occurrence of a fault is ascertained as a sum of all path probabilities from the monitoring node to the anomaly node. The path probability is a product of the respective transition probabilities along the nodes of the respective path.