Battery management system for determination of e.g. current intensity value of lithium-ion battery in electric car, has battery cells connected with terminals, where system determines temperature of contactor to determine threshold value

摘要

The system has series battery cells e.g. nickel metal hydride battery cells, connected with terminals of a battery over contactors, where the system determines temperature of one of the contactors to determine a threshold value by consideration of the temperature. The temperature is computed using a resistance value of the contactors. An input receives temperature measurement signals and determines the temperature based on the temperature measurement signals. Limit temperature is determined depending on battery cell temperature. A temperature sensor (100) is integrated in the contactors.