METHOD AND DEVICE FOR DETERMINING TEMPERATURE ESTIMATION MODEL, AND BATTERY MANAGEMENT SYSTEM TO WHICH TEMPERATURE ESTIMATION MODEL IS APPLIED

A method for determining a temperature estimating model for estimating a temperature in a battery module includes: estimating temperatures by substituting input data of a preliminary verification profile with models based on all the respective parameter sets; calculating a first error caused by a difference between measured temperatures of the preliminary verification profile and the estimated temperatures; comparing whether respective first errors for all the respective parameter sets are less than a first threshold value; extracting a parameter set corresponding to the first error that is less than the first threshold value from among the first errors as a first parameter set; calculating a maximum error that is the biggest error from among the errors between the temperatures estimated according to the input data changeable in a time-series way of the preliminary verification profile and measured temperatures of the preliminary verification profile by using a model based on the first parameter set; extracting a second parameter set based on a result of adding a product of the maximum error that is less than the second threshold value according to the comparison result and a corresponding weight value and a product of a first error corresponding to the first parameter set from among the first errors and a corresponding weight value; estimating temperatures according to input data of a reverification profile to the second parameter set; calculating a second error according to a difference between measured temperatures of the reverification profile and the estimated temperatures; and determining the model based on the second parameter set to be a temperature estimating model when the second error is less than a third threshold value.