A Novel Method to Estimate the State of Health of each Cell in Battery Pack

作者:Xiang Wu Yan; Qi Guo; Heng Bo Xu
来源:Advanced Materials Research, 2014, 1044-1045: 545-548.
DOI:10.4028/www.scientific.net/amr.1044-1045.545

摘要

<jats:p>In order to estimate the state of health (SOH) of each cell in the battery pack, polarization resistance and ohmic resistance were analyzed in the aging process of the battery pack. Accelerating aging test for the battery was done, quantitative relationship between the ohmic resistance and the capacity aging was obtained, a method of relative state of health (RSOH) evaluation was proposed accordingly, Experiments on the LiFePO4 battery pack which is connected in series by 100 cells have been taken, the experimental results show that the evaluation method of RSOH can evaluate the cells SOH accurately and is not limited by the operating conditions.</jats:p>

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