TY - GEN
T1 - Always-on quick charging for mobile devices
AU - Kim, Daeyong
AU - Jeon, Seunghyeok
AU - Lee, Seokjun
AU - Cha, Hojung
PY - 2019/3
Y1 - 2019/3
N2 - Mobile users are always demanding extended availability in their battery use. Together with enlarged battery capacity, fast charging is one approach that provides an improved user experience in battery use. Recently, device manufacturers have been developing a variety of fast charging techniques for mobile devices. However, the existing techniques severely reduce the charging power when the device is in use while charging. We experimentally demonstrate that the primary cause of the reduction in the charge speed during device use is to cope with the performance degradation incurred by heat generation. We then propose an adaptive charging scheme, called Always-on Quick Charging, which enables fast charging especially when the device is in use. The key idea of our approach is to adjust the charging power while ensuring that the heat generated by the charging does not affect the performance. The proposed scheme is implemented in Google's Pixel 2XL smartphone. The experiment with a real-world usage scenario shows that the charging speed of the proposed scheme is up to 2.4 times faster than the default scheme, while preserving device performance.
AB - Mobile users are always demanding extended availability in their battery use. Together with enlarged battery capacity, fast charging is one approach that provides an improved user experience in battery use. Recently, device manufacturers have been developing a variety of fast charging techniques for mobile devices. However, the existing techniques severely reduce the charging power when the device is in use while charging. We experimentally demonstrate that the primary cause of the reduction in the charge speed during device use is to cope with the performance degradation incurred by heat generation. We then propose an adaptive charging scheme, called Always-on Quick Charging, which enables fast charging especially when the device is in use. The key idea of our approach is to adjust the charging power while ensuring that the heat generated by the charging does not affect the performance. The proposed scheme is implemented in Google's Pixel 2XL smartphone. The experiment with a real-world usage scenario shows that the charging speed of the proposed scheme is up to 2.4 times faster than the default scheme, while preserving device performance.
UR - http://www.scopus.com/inward/record.url?scp=85070206150&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070206150&partnerID=8YFLogxK
U2 - 10.1109/PERCOM.2019.8767387
DO - 10.1109/PERCOM.2019.8767387
M3 - Conference contribution
T3 - 2019 IEEE International Conference on Pervasive Computing and Communications, PerCom 2019
BT - 2019 IEEE International Conference on Pervasive Computing and Communications, PerCom 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE International Conference on Pervasive Computing and Communications, PerCom 2019
Y2 - 12 March 2019 through 14 March 2019
ER -