Description

This reference design is a low standby and ship mode current consumption and high SOC gauging accuracy 13S: 48-V Li-ion battery pack design. It monitors each cell voltage: pack current and temperature with high accuracy and protects the Li-ion battery pack against overvoltage: undervoltage: over temperature and over current situations. The SOC gauging: based on bq34z100-g1: takes advantage of an impedance tracking algorithm and achieves as high as 2% accuracy at room temperature. Through a well-designed auxiliary power supply strategy and high efficiency: low quiescent current DC-DC converter LM5164: this design achieves 50-μA stand-by and 5-μA ship mode consumption: saving more energy and allowing longer shipping time and idle time. Also: this design supports a well running firmware: which helps to decrease product research time.