A Modularized Two-Stage Charge Equalizer With Cell Selection Switches for Series-Connected Lithium-Ion Battery String in an HEV

Kim, Chol-Ho; Kim, Moon-Young; Park, Hong-Sun; Moon, Gun-Woo

doi:10.1109/tpel.2012.2185248

Cited by 185 publications

(76 citation statements)

References 23 publications

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“…In [5][6][7][8], the target of SOC balancing is the cell unit of a battery that has a relatively low capacity. The balancing methods in [5][6][7][8] have a limited balancing current since it is difficult to increase the capacity of a balancing circuit built in battery management system. Therefore, if the conventional methods are applied to the high-capacity battery for EV, they are expected to exhibit a very slow balancing speed.…”

Section: Comparative Study Of the Proposed Soc Balancing Methodsmentioning

confidence: 99%

“…The SOC imbalance of the battery cells reduces the battery life and degrades battery energy utilization, sometimes leading to an explosion. To solve this problem, discharge and charge equalization methods have been introduced [3][4][5][6][7][8][9]. Conventional cell balancing methods can be considered to be either dissipative or energy recovery schemes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

State-of-Charge Balancing Control of a Battery Power Module for a Modularized Battery for Electric Vehicle

Choi¹,

Jeon²,

Yeo³

et al. 2016

Journal of Electrical Engineering and Technology

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-This paper proposes a State-of-Charge (SOC) balancing control of Battery Power Modules (BPMs) for a modularized battery for Electric Vehicles (EVs) without additional balancing circuits. The BPMs are substituted with the single converter in EVs located between the battery and the inverter. The BPM is composed of a two-phase interleaved boost converter with battery modules. The discharge current of each battery module can be controlled individually by using the BPM to achieve a balanced state as well as increased utilization of the battery capacity. Also, an SOC balancing method is proposed to reduce the equalization time, which satisfies the regulation of a constant DC-link voltage and a demand of the output power. The proposed system and the SOC balancing method are verified through simulation and experiment.

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Section: Comparative Study Of the Proposed Soc Balancing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

State-of-Charge Balancing Control of a Battery Power Module for a Modularized Battery for Electric Vehicle

Choi¹,

Jeon²,

Yeo³

et al. 2016

Journal of Electrical Engineering and Technology

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show abstract

“…Therefore, the novel MCBC needs to be considered carefully to reduce the mentioned disadvantages as shown in Section 2.2. Figure 7 illustrates an SCBS structure based on a conventional and modular balancing circuit [2,[31][32][33]. The conventional cell balancer used the series-connected battery cell string, which consists of N × M cells.…”

Section: Cell Balancing Circuit Using Sccmentioning

confidence: 99%

“…For the past decades, the series-connected battery string (SCBS) has been widely used in several applications of energy storage systems for electric vehicles (EVs), hybrid electric vehicles (HEVs), subway and electric railroad [1][2][3][4][5][6] that require high voltage and capacity. The balance of the SCBS plays an important role in chemical and electrical characteristics of a battery string.…”

Section: Introductionmentioning

confidence: 99%

A Modular Cell Balancer Based on Multi-Winding Transformer and Switched-Capacitor Circuits for a Series-Connected Battery String in Electric Vehicles

Bui

Kim

et al. 2018

Applied Sciences

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Abstract:In this paper, a cell balancing topology for a series-connected Lithium-Ion battery string (SCBS) in electric vehicles is proposed and experimentally verified. In particular, this balancing topology based on the modular balancer consists of an intra-module balancer based on a multi-winding transformer circuit and an outer-module balancer based on a switched capacitor converter, both offering the potential advantages and over conventional balancing methods, including short equalization time, simple control scheme, elimination of voltage sensors. In addition, a number of cells in the SCBS can be easily extended in this circuit. Furthermore, a system structure and an operating principle of the proposed topology are analyzed and experimentally verified for three different cases. The voltages of all cells in the SCBS reached the balanced state regardless of the various arrangement of the initial voltage, where the energy efficiency of the circuit reached 83.31%. Our experimental realization of the proposed balancing topology shows that such a technique could be employed in electric vehicles.

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“…These modules are typically referred to as equalizers. 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.…”

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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A Modularized Two-Stage Charge Equalizer With Cell Selection Switches for Series-Connected Lithium-Ion Battery String in an HEV

Cited by 185 publications

References 23 publications

State-of-Charge Balancing Control of a Battery Power Module for a Modularized Battery for Electric Vehicle

State-of-Charge Balancing Control of a Battery Power Module for a Modularized Battery for Electric Vehicle

A Modular Cell Balancer Based on Multi-Winding Transformer and Switched-Capacitor Circuits for a Series-Connected Battery String in Electric Vehicles

Modeling and computationally efficient algorithms for analysis of battery equalization systems

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