Lithium-Ion Battery Online Rapid State-of-Power Estimation under Multiple Constraints

Shun Xiang, Guangdi Hu, Ruisen Huang, Feng Guo and Pengkai Zhou
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Shun Xiang: School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Guangdi Hu: School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Ruisen Huang: School of Mechanical Engineering, Pusan National University, Busan 46241, Korea
Feng Guo: School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Pengkai Zhou: School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Energies, 2018, vol. 11, issue 2, 1-20

Abstract: The paper aims to realize a rapid online estimation of the state-of-power (SOP) with multiple constraints of a lithium-ion battery. Firstly, based on the improved first-order resistance-capacitance (RC) model with one-state hysteresis, a linear state-space battery model is built; then, using the dual extended Kalman filtering (DEKF) method, the battery parameters and states, including open-circuit voltage (OCV), are estimated. Secondly, by employing the estimated OCV as the observed value to build the second dual Kalman filters, the battery SOC is estimated. Thirdly, a novel rapid-calculating peak power/SOP method with multiple constraints is proposed in which, according to the bisection judgment method, the battery’s peak state is determined; then, one or two instantaneous peak powers are used to determine the peak power during T seconds. In addition, in the battery operating process, the actual constraint that the battery is under is analyzed specifically. Finally, three simplified versions of the Federal Urban Driving Schedule (SFUDS) with inserted pulse experiments are conducted to verify the effectiveness and accuracy of the proposed online SOP estimation method.

Keywords: state of power; peak power; dual extended Kalman filters; state of charge; parameter identification (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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