Open AccessEffect of Internal Resistance on Consistency in a set of Batteries at Low Temperature
Author(s) -
Hongwei Wang,
Jun Liu,
Weizhe Zhao,
Yusong Zhu,
Bin Hu,
Yanjun Fu,
Ziqiang Tao
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/585/1/012202
Subject(s) - groundwater recharge , internal resistance , battery (electricity) , voltage , set (abstract data type) , process (computing) , consistency (knowledge bases) , limit (mathematics) , electrical engineering , computer science , control theory (sociology) , power (physics) , engineering , mathematics , physics , geotechnical engineering , artificial intelligence , mathematical analysis , control (management) , aquifer , groundwater , programming language , operating system , quantum mechanics
An electric vehicle needs to use multiple individual batteries in a set to meet the requirements for use. This then imposes very strict requirement for the consistency in performance among individual batteries. This article has studied the internal resistance on the consistency in a set of batteries at low temperatures. The result indicates, the inconsistency of internal resistance among individual batteries connected in series in a set will hinder the performance of the batteries set. During the process of recharge, because of the difference in internal resistance, the recharge voltages applied to individual batteries in serial connection are different, resulting in the inconsistency in recharge voltage among batteries. And as the process of recharge goes on, the voltage of the battery with higher internal resistance may reach the upper limit on recharge voltage early. As far as the batteries in parallel connection in a set is concerned, because of the difference in internal resistance, the recharge currents distributed among individual batteries are different, with the voltages of the batteries at higher recharge currents to rise fast.