Low-power Embedded Supply System: Li-ion Battery with Gas-Gauge Case Study

Abstract Power management is one of the key aspects to consider in low-power embedded systems design. It is a delicate art of minimizing system’s power consumption while maintaining its required functionalities. Well-tuned power management becomes even more crucial in systems without any possibility of energy harvesting, which rely only on battery power supply. This contribution addresses the above issue by studying a low-power system’s battery voltage level and capacity profiles in various operating modes, and lists the arrangements having the most significant impact on extension of system’s operating time. The applied methods and configurations were tested on an embedded Li-ion battery-powered system featuring a microcontroller Freescale FRDM-KL25Z and a “gas gauge” battery monitoring circuit LTC 2941.

[1]  Adnan Harb,et al.  Energy harvesting: State-of-the-art , 2011 .

[2]  Robert Bogue.  Solar‐powered sensors: a review of products and applications , 2012 .

[3]  Mahmoud Shousha,et al.  Design and Implementation of Assisting Converter-Based Integrated Battery Management System for Electromobility Applications , 2018, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[4]  Jaromir Konecny,et al.  Fuzzy Energy Management of Autonomous Weather Station , 2015 .

[5]  Ian F. Akyildiz,et al.  Wireless sensor networks: a survey , 2002, Comput. Networks.

[6]  Mani B. Srivastava,et al.  Power management in energy harvesting sensor networks , 2007, TECS.

[7]  Tian He,et al.  Energy management in sensor networks , 2012, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.