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This paper introduces a design and realization method of battery management system about emergency light based on time division multiplexing and balanced charging technology. Through Calculating state of electric charge by detecting the battery charge and discharge current and monitoring of a single voltage, the system achieves a balanced charge control methods and strategies, avoided battery overcharge and over-discharge, and further improves the efficiency of the battery, extending the battery life.doi:10.14257/ijca.2015.8.5.08 fatcat:sjiqppcmerakjkk4isckttfhne