Patent ID: 11929471
Assignee: ROLLS-ROYCE DEUTSCHLAND LTD & CO KG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method for detecting a thermal runaway of a battery module with a number of cells, the method comprising:
on a continuing basis, for each point in time:
capturing a set of currents, the set of currents comprising a respective cell current value for each cell of the number of cells;
capturing a set of temperatures within the battery module, the set of temperatures comprising at least one temperature value;
capturing a set of states, the set of states comprising a respective state of charge value for each cell of the number of cells;
deriving a set of resistances using the at least one temperature value of the set of temperatures and using the state of charge values of the set of states, the set of resistances comprising a respective cell resistance value for each cell of the number of cells;
calculating a set of temperature predictors using the set of currents and the set of resistances, the set of temperature predictors comprising at least one temperature prediction value that is estimated for a location within the battery module; and
calculating a set of runaway predictors using the set of currents, the set of temperatures, the set of resistances, and the set of temperature predictors, the set of runaway predictors comprising a respective runaway predictor value for each cell of the number of cells; and
setting a warning indicator when at least one runaway predictor value of the set of runaway predictors exceeds a predefined threshold value.