Open Access System for Information Sharing

Login Library

 

Article
Cited 4 time in webofscience Cited 5 time in scopus
Metadata Downloads

Detection Method for Soft Internal Short Circuit in Lithium-Ion Battery Pack by Extracting Open Circuit Voltage of Faulted Cell

Title
Detection Method for Soft Internal Short Circuit in Lithium-Ion Battery Pack by Extracting Open Circuit Voltage of Faulted Cell
Authors
Seo, MinhwanGoh, TaedongPark, MinjunKim, Sang Woo
Date Issued
Jul-2018
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Abstract
Early detection of internal short circuit which is main cause of thermal runaway in a lithium-ion battery is necessary to ensure battery safety for users. As a promising fault index, internal short circuit resistance can directly represent degree of the fault because it describes self-discharge phenomenon caused by the internal short circuit clearly. However, when voltages of individual cells in a lithium-ion battery pack are not provided, the effect of internal short circuit in the battery pack is not readily observed in whole terminal voltage of the pack, leading to difficulty in estimating accurate internal short circuit resistance. In this paper, estimating the resistance with the whole terminal voltages and the load currents of the pack, a detection method for the soft internal short circuit in the pack is proposed. Open circuit voltage of a faulted cell in the pack is extracted to reflect the self-discharge phenomenon obviously; this process yields accurate estimates of the resistance. The proposed method is verified with various soft short conditions in both simulations and experiments. The error of estimated resistance does not exceed 31.2% in the experiment, thereby enabling the battery management system to detect the internal short circuit early.
URI
http://oasis.postech.ac.kr/handle/2014.oak/94970
ISSN
1996-1073
Article Type
Article
Citation
Energies, vol. 11, no. 7, 2018-07
Files in This Item:

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

 KIM, SANG WOO
Dept of Electrical Enginrg
Read more

Views & Downloads

Browse