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JACIII Vol.20 No.7 pp. 1077-1085
doi: 10.20965/jaciii.2016.p1077
(2016)

Paper:

An Adaptive Fast Charging Strategy for LiFePO4 Battery Applied to Heavy-Haul Train ECP Brake System

Liran Li, Zhiwu Huang, Xiaohui Gong, Jun Peng, and Yanhui Zhou

School of Information Science and Engineering, Central South University
Changsha, Hunan 410075, China

Received:
July 5, 2016
Accepted:
September 13, 2016
Online released:
December 20, 2016
Published:
December 20, 2016
Keywords:
SOC estimation, lithium battery, adaptive fast charging strategy, sliding-mode observer
Abstract

A dedicated LiFePO4 battery management system (BMS) used in the electrically controlled pneumatic brake system of a heavy-haul train needs a reliable, efficient and safe charging system to guarantee an uninterrupted power supply. To achieve that, this paper proposes an adaptive fast and safe charging strategy for Li-ion batteries based on the Lyapunov stability theory. In the strategy, a sliding-mode state of charge (SOC) observer is designed, and based on this, the dynamical reference charging current profile is derived. With the estimated SOC and dynamical setting current, the adaptive current control law is proposed by using a Lyapunov function. Finally, experiments are conducted to verify the feasibility and superiority of the proposed method.

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Last updated on Mar. 28, 2017