Fuzzy Control for Battery Equalization Based on State of Charge

Yan, Jingyu; Zhu, Cheng; Xu, Guoqing; Qian, Huihuan; Xu, Yangsheng

doi:10.1109/vetecf.2010.5594380

Cited by 47 publications

(26 citation statements)

References 12 publications

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“…FLC can simulate human knowledge and reasoning and is robust even when measurements are imprecise or when input characteristics change [34][35][36].To explore the influence of different factors, such as power demand and discharge current, this study uses fuzzy control strategy in the PCCEM strategy. FLC calculates the optimal number of cells connected in the circuit and the value of ΔSOC.…”

Section: Fuzzy Logic Control Strategymentioning

confidence: 99%

Energy Management of Parallel-Connected Cells in Electric Vehicles Based on Fuzzy Logic Control

et al. 2017

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Abstract:Inconsistencies that are associated with parallel-connected cells used in electric vehicles induce varied states of charge (SOCs) in each cell. Thus, loop current in the battery pack is inevitable, and this reduces overall capacity, energy utilization rate, and pack lifetime. However, no method is available to address loop current. To reduce loop current and the resulting battery inconsistency, a parallel-connected cell pack (PCCP) model that considers thermal effects is established, and a novel Simscape model that is based on PCCP is successfully constructed. Furthermore, the strategy of parallel-connected cell energy management (PCCEM) is proposed to utilize fuzzy logic control (FLC) strategy, which automatically adjusts the number of cells in a circuit in accordance with the load demand, and turns on the first N switches in the corresponding SOC order. The New European Driving Cycle (NEDC) driving cycle simulation shows that the PCCEM strategy considerably reduces loop current and improves the consistency of battery performance and the utilization rate of battery power.

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Section: Fuzzy Logic Control Strategymentioning

confidence: 99%

Energy Management of Parallel-Connected Cells in Electric Vehicles Based on Fuzzy Logic Control

et al. 2017

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“…[3]- [6] proposed dissipative techniques that use an individual cell equalizer (ICE) consisting of one resistor and one switch Manuscript received Sep. 30,2012; revised Dec. 15,2012 Recommended for publication by Associate Editor Woo-Jin Choi. † Corresponding Author: chanyut@rmutl.ac.th Tel: +662-470-9070, Fax: +6654-711-601, KMUTT connected in parallel to each battery in a string.…”

Section: Introductionmentioning

confidence: 99%

“…A modularized charge equalization converter was presented with the CES designed as a modular package, [9] and [22]- [30]. Refs.…”

Section: Introductionmentioning

confidence: 99%

Low-Voltage-Stress AC-Linked Charge Equalizing System for Series-Connected VRLA Battery Strings

Karnjanapiboon¹,

Jirasereeamornkul²,

Monyakul³

2013

Journal of Power Electronics

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This paper presents a low voltage-stress AC-linked charge equalizing system for balancing the energy in a serially connected, valve-regulated lead acid battery string using a modular converter that consists of multiple transformers coupled together. Each converter was coupled through an AC-linked bus to increase the overall energy transfer efficiency of the system and to eliminate the problem of the unbalanced charging of batteries. Previous solutions are based on centralized and modularized topologies. A centralized topology requires a redesign of the hardware and related components. It also faces a high voltage stress when the number of batteries is expanded. Modularized solutions use low-voltage-stress, double-stage, DC-linked topologies which leads to poor energy transfer efficiency. The proposed solution uses a low-voltage stress, AC-linked, modularized topology that makes adding more batteries easier. It also has a better energy transfer efficiency. To ensure that the charge equalization system operates smoothly and safely charges batteries, a small intelligent microcontroller was used in the control section. The efficiency of this charge equalization system is 85%, which is 21% better than other low-voltage-stress DC-linked charging techniques. The validity of this approach was confirmed by experimental results.

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“…Technologies used in the hardware realization of battery equalizers include dissipative resistance shunt [13], bidirectional dc-dc converters [14,15], switch capacitors [16][17][18], multi winding transformers [19] and two-step buck boost converters [20]. To illustrate the typical analysis performen of equalizer, the circuit diagram studied in paper [1] is given in Fig 1.2. Obviously, the equalizer has a symmetrical structure, therefore, without loss of generality, we assume the SOC of Cell 1 is larger than that of Cell 2.…”

mentioning

confidence: 99%

“…The proposed battery equalization scheme is a bidirectional dc-dc converter with energy transferring capacitor that can be used to design the bidirectional nondissipative equalizer for a battery balancing system. Paper [1] is based on the analysis of bi-directional Cμk converter, the paper proposed a fuzzy controller to adaptively tune the equalizing current. The inputs of fuzzy controller are selected as the difference in state of charge, the average of state of charge and the total internal resistance.…”

mentioning

confidence: 99%

Modeling and computationally efficient algorithms for analysis of battery equalization systems

Zhou

Zhang

2016

2016 12th World Congress on Intelligent Control and Automation (WCICA)

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Fuzzy Control for Battery Equalization Based on State of Charge

Cited by 47 publications

References 12 publications

Energy Management of Parallel-Connected Cells in Electric Vehicles Based on Fuzzy Logic Control

Energy Management of Parallel-Connected Cells in Electric Vehicles Based on Fuzzy Logic Control

Low-Voltage-Stress AC-Linked Charge Equalizing System for Series-Connected VRLA Battery Strings

Modeling and computationally efficient algorithms for analysis of battery equalization systems

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