A Voltage Prediction Method of LiFePO4 Batteries on Electric Vehicle During the Relaxation State after Discharging

DOI

10.2991/icmmcce-17.2017.159How to use a DOI?

Keywords

Electric Vehicles; Lithium Iron Phosphate; Open-circuit Voltage; Prediction.

Abstract

As the electric vehicle experiences the acceleration and deceleration periods alternately, the power battery open-circuit voltage at the relaxation stte after discharging varies greatly, which brings difficulties in measuring the state of charge(SOC) and causes measurement errors. To solve this problem, a certain type of LiFePO4 battery is taken as the research object. Based on electrochemistry and equivalent circuit theory, this research studies the relation between the open-circuit voltage at the relaxation stage after discharging of the LiFePO4 battery in moving electric vehicle and time. Combined with system identification method, an open-circuit voltage prediction model of lithium iron phosphate batteries is established, and experiment has been carried out to verify the feasibility of the model.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jun-wei Hou
AU  - Li-fu Gong
PY  - 2017/09
DA  - 2017/09
TI  - A Voltage Prediction Method of LiFePO4 Batteries on Electric Vehicle During the Relaxation State after Discharging
BT  - Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 2017)
PB  - Atlantis Press
SP  - 890
EP  - 895
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmmcce-17.2017.159
DO  - 10.2991/icmmcce-17.2017.159
ID  - Hou2017/09
ER  -