Reconfiguration-assisted charging in large-scale Lithium-ion battery systems

Liang He, Linghe Kong, Siyu Lin, Shaodong Ying, Yu Gu, Tian He, Cong Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations

Abstract

Large-scale Lithium-ion batteries are widely adopted in many systems such as electric vehicles and energy backup in power grids. Due to factors such as manufacturing difference and heterogeneous discharging conditions, cells in the battery system may have different statuses such as diverse voltage levels. This cell diversity is commonly known as the cell unbalance issue, which becomes more critical as the system scale increases. The cell unbalance issue not only significantly degrades the system performance in many aspects, but may also cause system safety issues such as the burning of battery cells and thus increase system vulnerability. In this paper, based on the advancement in reconfig-urable battery systems, we demonstrate how to utilize system reconfiguration flexibility for achieving an efficient charging process for the battery system. With the proposed reconfiguration-assisted charging, the cells in the system are categorized according to their voltages, and the charging process is evolutionarily carried out in a category-by-category manner. For the charging of cells in a given category, a graph-based algorithm is presented to obtain the desired system configuration. We extensively evaluate the reconfiguration-assisted charging through small-scale implementation and large-scale trace-driven simulations. The results demonstrate that our proposed techniques can achieve a 25% increase on average on charged capacities of individual cells while yielding a dramatically reduced variance.

Original languageEnglish (US)
Title of host publication2014 ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2014
PublisherIEEE Computer Society
Pages60-71
Number of pages12
ISBN (Print)9781479949311
DOIs
StatePublished - 2014
Event5th IEEE/ACM International Conference on Cyber-Physical Systems, ICCPS 2014 - Berlin, Germany
Duration: Apr 14 2014Apr 17 2014

Publication series

Name2014 ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2014

Other

Other5th IEEE/ACM International Conference on Cyber-Physical Systems, ICCPS 2014
CountryGermany
CityBerlin
Period4/14/144/17/14

Fingerprint Dive into the research topics of 'Reconfiguration-assisted charging in large-scale Lithium-ion battery systems'. Together they form a unique fingerprint.

Cite this