A Modularized Charge Equalizer Using a Battery Monitoring IC for Series-Connected Li-Ion Battery Strings in Electric Vehicles

Kim, Chol-Ho; Kim, Moon-Young; Moon, Gun-Woo

doi:10.1109/tpel.2012.2227810

Cited by 277 publications

(126 citation statements)

References 26 publications

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“…In mode 1, there are four loops forming four equations, and each loop equation can be expressed as Equation (1). Figure 4 shows an equivalent circuit.…”

Section: Analysis Of the Previous Cell Balancing Circuitsmentioning

confidence: 99%

“…The value of the leakage inductance and the magnetizing inductance can be used to apply the average voltage. From Equation (1) to Equation (3), the VTP can be expressed as follows: …”

Section: Analysis Of the Previous Cell Balancing Circuitsmentioning

confidence: 99%

“…The value of the leakage inductance and the magnetizing inductance can be used to apply the average voltage. From Equation (1) to Equation (3), the VTP can be expressed as follows: In this mode, four switches are turned on. The value of the leakage inductance and the magnetizing inductance can be used to apply the average voltage.…”

Section: Analysis Of the Previous Cell Balancing Circuitsmentioning

confidence: 99%

“…The conventional cell balancer used the series-connected battery cell string, which consists of N × M cells. Therein, each cell has a separate energy transmitting path as shown in Figure 7a, whereas the modular cell balance is divided into M groups of the SCBS; each module has N cells, as represented in Figure 7b,c [1,34,35]. For the modular cell balancer, M groups of the SCBS are connected with M modules to balance the voltages in each module.…”

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%

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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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“…In mode 1, there are four loops forming four equations, and each loop equation can be expressed as Equation (1). Figure 4 shows an equivalent circuit.…”

Section: Analysis Of the Previous Cell Balancing Circuitsmentioning

confidence: 99%

“…The value of the leakage inductance and the magnetizing inductance can be used to apply the average voltage. From Equation (1) to Equation (3), the VTP can be expressed as follows: …”

Section: Analysis Of the Previous Cell Balancing Circuitsmentioning

confidence: 99%

Section: Analysis Of the Previous Cell Balancing Circuitsmentioning

confidence: 99%

Section: Cell Balancing Circuit Using Sccmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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A novel nine‐level boost inverter with a low component count for electric vehicle applications

Naik

Suresh

Rao

2021

Int Trans Electr Energ Syst

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Summary In electric vehicles (EVs), considerable battery cells are cascaded in series for motor driving to improve the output voltage. The series combination of battery cells causes challenges like isolation of faulty cells, voltage unbalance, and slow charge equalization. Therefore, state‐of‐charge (SOC) and voltage equalization circuits are often used in industries to protect the battery cells. A nine‐level inverter circuit with a double voltage boost is proposed to reduce the above issues based on the switch‐capacitor (SC) principle. Unique features like self‐balancing, voltage boosting are attained, which cannot be achieved through traditional inverters. The proposed topology can operate at a wide range of modulation indices (ma) to produce different voltage levels. The absence of a back‐end H‐bridge in the proposed circuit offers low voltage stress across the semiconductors. The operating principle, capacitor sizing, and modulation approach are presented. Further, experimental tests are conducted at different loading conditions to verify the performance of the proposed circuit.

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Mathematical Modeling, Performance Analysis and Control of Battery Equalization Systems: Review and Recent Developments

Han

Liang

Han

2016

Advances in Battery Manufacturing, Service, and Management Systems

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A Modularized Charge Equalizer Using a Battery Monitoring IC for Series-Connected Li-Ion Battery Strings in Electric Vehicles

Cited by 277 publications

References 26 publications

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

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

A novel nine‐level boost inverter with a low component count for electric vehicle applications

Mathematical Modeling, Performance Analysis and Control of Battery Equalization Systems: Review and Recent Developments

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