Deployments of battery-powered IoT devices have become ubiquitous , monitoring everything from environmental conditions in smart cities to wildlife movements in remote areas. How to manage the life-cycle of sensors in such large-scale... more
Deployments of battery-powered IoT devices have become ubiquitous , monitoring everything from environmental conditions in smart cities to wildlife movements in remote areas. How to manage the life-cycle of sensors in such large-scale deployments is currently an open issue. Indeed, most deployments let sensors operate until they fail and fix or replace the sensors post-hoc. In this paper, we contribute by developing a new approach for facilitating the life-cycle management of large-scale sensor deployments through online estimation of battery health. Our approach relies on so-called V-edge dynamics which capture and characterize instantaneous voltage drops. Experiments carried out on a dataset of battery discharge measurements demonstrate that our approach is capable of estimating battery health with up to 80% accuracy, depending on the characteristics of the devices and the processing load they undergo. Our method is particularly well-suited for the sensor devices, operating dedicated tasks, that have constant discharge during their operation. CCS CONCEPTS • Computer systems organization → Embedded systems; • Hardware → Batteries; Sensor applications and deployments.
This work presents the development of the first-generation Multifunctional Energy Storage (MES) Composites-a multifunctional structural battery which embeds li-ion battery materials into high-strength composites together with in-situ... more
This work presents the development of the first-generation Multifunctional Energy Storage (MES) Composites-a multifunctional structural battery which embeds li-ion battery materials into high-strength composites together with in-situ networks of sensors and actuators. MES Composites not only can supply electrical power but also serve as structural elements, capable of concurrently carrying mechanical loads. In addition, the built-in sensor/actuator networks can monitor the state and health of both of the composite structure as well as the battery on a real-time on-demand basis. As part of this study, MES Composite batteries are fabricated and then undergo a series of characterization tests to evaluate the synergistic energy-storage and load-carrying functionalities. Data generated from built-in sensors are also used to characterize the battery state of charge and health, in comparison with results from the electrochemical reference performance tests, and quantify any non-catastrophic degradation in the electrochemical performance. The obtained results verify the multifunctional capabilities of MES Composites for developing a novel minimum-weight and efficient energy storage system.
This work presents the development of the first-generation Multifunctional Energy Storage (MES) Composites a multifunctional structural battery which embeds li-ion battery materials into high-strength composites together with in-situ... more
This work presents the development of the first-generation Multifunctional Energy Storage (MES) Composites a multifunctional structural battery which embeds li-ion battery materials into high-strength composites together with in-situ networks of sensors and actuators. MES Composites not only can supply electrical power but also serve as structural elements, capable of concurrently carrying mechanical loads. In addition, the built-in sensor/actuator networks can monitor the state and health of both of the composite structure as well as the battery on a real-time on-demand basis. As part of this study, MES Composite batteries are fabricated and then undergo a series of characterization tests to evaluate the synergistic energy-storage and load-carrying functionalities. Data generated from built-in sensors are also used to characterize the battery state of charge and health, in comparison with results from the electrochemical reference performance tests, and quantify any non-catastrophi...
