Open AccessBattery model based on cubic over‐potential differential equation
Author(s) -
Hsieh YaoChing,
Chiu YuChun,
Wu WeiTing,
Huang YouChun
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5683
Subject(s) - battery (electricity) , voltage , differential equation , control theory (sociology) , differential (mechanical device) , current (fluid) , set (abstract data type) , simulation , automotive engineering , computer science , mathematics , mechanics , materials science , electrical engineering , mathematical analysis , thermodynamics , engineering , physics , power (physics) , control (management) , artificial intelligence , programming language
This study is research upon the over‐potential of Li‐iron batteries. By performing many cycles of charging–discharging experiments under controlled ambient temperature, adjusted depth‐of‐discharge, and discharging current rates, the dynamic voltage variation data is collected. A model based on the cubic over‐potential differential equation is proposed. This model is able to predict the gradually prolonged time‐constant dynamics of the battery loaded voltages with fewer parameters. By this way, a set of procedures is also proposed to adjust the parameters as the battery ages. The experimental result is used to verify the feasibility of this model. Even for the aged batteries, the prediction error is small and the result is satisfactory.