Method for enhancing a battery management system, battery management system, battery system and motor vehicle

摘要

A method for enhancing a battery management system for determining at least one limit value for a first characteristic variable of a battery. The method includes measuring different values of a further characteristic variable for predetermined values of the first characteristic variable in order to determine limit values of the further characteristic variable for charging and/or discharging the battery for the predetermined values of the first characteristic variable, with the result that battery discharging or charging corresponding to the limit values does not result in a battery voltage outside a permissible battery voltage range if the battery has that predetermined value of the characteristic variable which is associated with the respective limit value. The method further includes determining charging and/or discharging limit values of the characteristic variable for predetermined values of the further characteristic variable using the determined charging and/or discharging limit values.

主权项

1. A method of determining limit values for a first characteristic variable of a battery for at least one of charging and discharging the battery, comprising:
setting values of the first characteristic variable to be used as predetermined values of the first characteristic variable; setting values of a second characteristic variable of the battery to be used as predetermined value of the second characteristic variable; determining a first family of characteristics of the battery by measuring limit values of the second characteristic variable for the predetermined values of the first characteristic variable, the limit values satisfying at least one limit criterion for the battery during at least one of charging and discharging the battery, the at least one limit criterion including that a voltage of the battery remains within a permissible voltage range of the battery when (i) the first characteristic variable of the battery is equal to one of the predetermined values of the first characteristic variable and (ii) the battery is at least one of being charged or discharged to a limit value of the second characteristic variable that corresponds to the one of the predetermined values of the first characteristic variable; determining limit values for the first characteristic variable based on the predetermined values of the second characteristic variable and the limit values of the second characteristic variable using the first family of characteristics; and storing the determined limit values of the second characteristic variable in a memory apparatus of a battery management system.