Open AccessParameter Identification of Lithium Iron Phosphate Battery Model for Battery Electric Vehicle
Author(s) -
Shang Wang,
Qingzhang Chen,
Kang Wang,
Zhengyi Wang,
Yao Wang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/677/3/032048
Subject(s) - lithium iron phosphate , battery (electricity) , equivalent circuit , lithium battery , lithium (medication) , internal resistance , open circuit voltage , lithium ion battery , matlab , automotive engineering , voltage , electric vehicle , computer science , electrical engineering , power (physics) , engineering , chemistry , physics , ion , thermodynamics , medicine , organic chemistry , endocrinology , ionic bonding , operating system
The third-order equivalent circuit model of battery electric vehicle lithium iron phosphate battery has been established. According to the characteristics of lithium iron phosphate battery in charging and discharging process, the data of open circuit voltage change during battery test were used to identify the third-order equivalent circuit model parameters. The joint simulation of lithium iron phosphate battery discharging based on NEDC operating condition was carried out by using MATLAB and ADVISOR software. The lithium iron phosphate battery was tested on the power battery test platform. The results show that the maximum relative error between the value of simulation and test is small. The trend of the simulation and test curve is in good agreement. Moreover, the characteristics of the lithium iron phosphate battery are described well by the third-order equivalent circuit model. The results demonstrate that the third-order equivalent circuit model has high accuracy.