Accurate Monitoring and 50µA Standby Current, 13S, 48V Li-Ion Battery Pack Reference Design

This reference design is a low standby and transport mode current consumption, high SOC metering accuracy, 13S, 48V Li-ion battery pack design. It monitors each cell voltage, battery pack current and temperature with high precision and protects lithium-ion battery packs from overvoltage, undervoltage, overheating and overcurrent. SOC metrology based on the bq34z100-g1 utilizes an impedance tracking algorithm to achieve up to 2% accuracy at room temperature. Utilizing a carefully designed auxiliary power strategy and the efficient low quiescent current DC/DC converter LM5164, this design achieves 50µA standby power and 5µA transport mode power, thereby saving more energy and extending transport and idle times. In addition, the design supports working firmware, which helps reduce product development time.

characteristic

• ●Achieve 2% battery pack SOC accuracy at room temperature
• ● Standby mode current consumption is 50μA
• ● Transport mode current consumption is 15μA
• ● Powerful, programmable protection functions, including: battery overvoltage, battery undervoltage, overcurrent discharge, short circuit, overheating and undercooling
• ●Support 100mA battery balancing
• ● High-side charge and discharge MOSFET, supporting pre-discharge function