TY - GEN
T1 - Aging mitigation of power supply-connected batteries
AU - Kim, Jaemin
AU - Probstl, Alma
AU - Chakraborty, Samarjit
AU - Chang, Naehyuck
N1 - Publisher Copyright:
© 2014 ACM.
PY - 2015/10/13
Y1 - 2015/10/13
N2 - Battery-operated portable electronics, from smartphones to notebook computers, are generally sold with a dedicated power supply. The power supply operates the device and also charges the built-in battery. Most users are concerned about the battery aging while the device is operated by the built-in battery. This is the first paper to our knowledge that discovers, analyzes and mitigates the built-in battery aging when the device is operated with the provided power supply. We focus on the fact that in an effort to reduce size and weight, the capacity of the power supply is optimized for the average power demand rather than the maximum power demand. Such a reduced-capacity power supply brings advantages in terms of size, weight and cost but it accelerates the battery aging because the aging progresses even when the device is operated by the power supply, which is different from the expectation of most users. We quantitatively analyze such battery aging with various operating scenarios based on standard benchmark programs. We show that the battery experiences significant aging, i.e., the battery lifetime can be reduced to 23% of its shelf lifetime. Finally, we propose a cost-effective supercapacior hybrid to mitigate such battery aging when the device is operated using the power supply. The simulation results show that 10, 1 and 0.1 mF supercapacitors can reduce the battery aging by 68.6%, 55.1% and 4.6%, respectively.
AB - Battery-operated portable electronics, from smartphones to notebook computers, are generally sold with a dedicated power supply. The power supply operates the device and also charges the built-in battery. Most users are concerned about the battery aging while the device is operated by the built-in battery. This is the first paper to our knowledge that discovers, analyzes and mitigates the built-in battery aging when the device is operated with the provided power supply. We focus on the fact that in an effort to reduce size and weight, the capacity of the power supply is optimized for the average power demand rather than the maximum power demand. Such a reduced-capacity power supply brings advantages in terms of size, weight and cost but it accelerates the battery aging because the aging progresses even when the device is operated by the power supply, which is different from the expectation of most users. We quantitatively analyze such battery aging with various operating scenarios based on standard benchmark programs. We show that the battery experiences significant aging, i.e., the battery lifetime can be reduced to 23% of its shelf lifetime. Finally, we propose a cost-effective supercapacior hybrid to mitigate such battery aging when the device is operated using the power supply. The simulation results show that 10, 1 and 0.1 mF supercapacitors can reduce the battery aging by 68.6%, 55.1% and 4.6%, respectively.
KW - Aging
KW - Batteries
KW - Benchmark testing
KW - Degradation
KW - Power supplies
KW - Supercapacitors
KW - System-on-chip
UR - http://www.scopus.com/inward/record.url?scp=84953391147&partnerID=8YFLogxK
U2 - 10.1145/2627369.2627622
DO - 10.1145/2627369.2627622
M3 - Conference contribution
AN - SCOPUS:84953391147
T3 - Proceedings of the International Symposium on Low Power Electronics and Design
SP - 233
EP - 238
BT - Proceedings of the 2014 ACM/IEEE International Symposium on Low Power Electronics and Design, ISLPED 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - ACM/IEEE International Symposium on Low Power Electronics and Design, ISLPED 2014
Y2 - 11 August 2014 through 13 August 2014
ER -