BALANCING TEMPERATURE OF BATTERY MANAGEMENT SYSTEM CIRCUITS

• Main Authors: Heiling, Christian, Walther, Christian, Weidner, Felix, Trebo, Heinrich
• Format: Patent
• Language: English
• Published: 06.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

Circuitry to measure individual battery cells of a battery pack and make corrections to account for environmental differences between battery cells and their associated measuring circuit. Several cell supervision circuits (CSCs) may be placed to monitor and manage one or more subsets of battery cells within the battery pack. The temperature of this battery pack is not distributed homogeneously which may cause a temperature gradient and affect the internal regulation circuit that generates a reference voltage used to determine the voltage of its supervised cell or cells and regulates power to the CSC components. This reference voltage is temperature dependent and thus a temperature mismatch of the CSCs. Based on the measurement circuit an external regulation terminal controls a pass device to share power between the pass device and the internal regulation circuit to manage the temperature of each CSC.