Flyback battery equalizer with voltage doubler rectifier

Kim, Hyoung-Suk; Park, Ki-Bum; Seong, Hyun-Wook; Moon, Gun-Woo; Youn, Myung-Joong

doi:10.1109/icpe.2011.5944607

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…Initially, S 1 , S 2 , and S 3 are open simultaneously, as seen in Figure 20b. This causes the voltage on inductor L to become negative and the current to flow through the diode, discharging L. When the current i D reaches zero, the converter enters the second mode of operation, known as discontinuous conduction mode (DCM) [46]. The voltage across L can be calculated using Equation (33).…”

Section: Discussionmentioning

confidence: 99%

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A Review on Power Electronic Converters for Modular BMS with Active Balancing

2023

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Electric vehicles (EVs) are becoming increasingly popular due to their low emissions, energy efficiency, and reduced reliance on fossil fuels. One of the most critical components in an EV is the energy storage and management system, which requires compactness, lightweight, high efficiency, and superior build quality. Active cell equalization circuits such as those used in battery management systems (BMS) have been developed to balance the voltage and state of charge (SoC) of individual cells, ensuring the safety and reliability of the energy storage system. The use of these types of equalization circuits offers several benefits including improved battery performance, extended battery life, and enhanced safety, which are essential for the successful adoption of EVs. This paper provides a comprehensive overview of the research works related to active cell equalization circuits. This review highlights the important aspects, advantages and disadvantages, and specifications.

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Section: Discussionmentioning

confidence: 99%

“…The MWT converter balances by switching the controlled semiconductor S n with a constant frequency and duty cycle [45]. When the current iD reaches zero, the converter enters the second mode of operation, known as discontinuous conduction mode (DCM) [46]. The voltage across L can be calculated using Equation Error!…”

Section: Multi-winding Transformermentioning

confidence: 99%

A Review on Power Electronic Converters for Modular BMS with Active Balancing

2023

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“…In the literature, transient current peaks have been limited with snubber circuits [18,19]. This solution is quite cheap and straightforward.…”

Section: Introductionmentioning

confidence: 99%

A Novel RC-Based Architecture for Cell Equalization in Electric Vehicles

et al. 2020

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Nowadays, research on electric vehicles is increasing because they have the potential to decrease greenhouse-gas emissions dramatically in the transport sector. For these types of vehicles, the battery is one of the main components. The traction system needs a cell series connection to fulfill the energy requirements. Nevertheless, batteries differ from each other due to a normal dispersion in their capacity, internal resistance, and self-discharge rate. This paper presents a novel battery equalizer circuit using an RC-based topology to equalize two adjacent cells of a battery pack. It has the advantage of merging a resistor-based equalizer, a capacitor-based equalizer, and an RC-based equalizer in one circuit. In this way, it is possible to limit the current stress in the components of the circuit. The proposed method increases the equalization time by 35% for a threshold current of 4 A. However, it is possible design the system for another threshold current. Finally, the complexity of the controller is not compromised in the proposed architecture. The operation, analysis, and design of the architecture are presented and compared to the classic schemes. The theoretical analysis is validated through simulation results.

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“…The voltage of each LiFePO 4 battery is low, but the required voltage of an electric vehicle is high (300 V or higher). Therefore the number of LiFePO 4 batteries in a string should be more than 90 to obtain the required voltage and a careful management is necessary for battery strings [16–32]. As the batteries have inherent differences in chemical and electrical characteristics when they are manufactured, this may cause overcharge/overdischarge and reduce the cycle life of the battery when several batteries are connected in series to obtain the required voltage.…”

Section: Introductionmentioning

confidence: 99%

“…The flyback battery equaliser is a simple configuration [16, 20–22]. The voltages of all batteries are detected and compared to control the switches, and the energy stored in the magnetising inductance is transferred to lower voltage cell.…”

Section: Introductionmentioning

confidence: 99%

Charge equalisation for series‐connected LiFePO ₄ battery strings

Hua¹,

Fang

Li³

2015

IET Power Electronics

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LiFePO 4 batteries are suitable for high power applications because of their advantages of large discharge current and high efficiency. Owing to the characteristics of LiFePO 4 batteries, it may cause overcharge/over-discharge and reduce the cycle life of the battery when series-connected batteries are used. This study proposes a charge equaliser based on an interleaved active clamp flyback converter. The interleaved topology reduces the output ripple current. Therefore the rectifier diode conduction loss can be reduced. With a clamp capacitor and leakage inductance, the switches are turned on with zero-voltage switching while the voltage stress of switch is reduced. Furthermore, a constant switching frequency and duty ratio are designed to achieve a simple control for the proposed system. The simulations and experimental results are provided to verify the performance of the proposed charge equaliser.

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Flyback battery equalizer with voltage doubler rectifier

Cited by 8 publications

References 10 publications

A Review on Power Electronic Converters for Modular BMS with Active Balancing

A Review on Power Electronic Converters for Modular BMS with Active Balancing

A Novel RC-Based Architecture for Cell Equalization in Electric Vehicles

Charge equalisation for series‐connected LiFePO ₄ battery strings

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Flyback battery equalizer with voltage doubler rectifier

Cited by 8 publications

References 10 publications

A Review on Power Electronic Converters for Modular BMS with Active Balancing

A Review on Power Electronic Converters for Modular BMS with Active Balancing

A Novel RC-Based Architecture for Cell Equalization in Electric Vehicles

Charge equalisation for series‐connected LiFePO 4 battery strings

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Product

Resources

About

Charge equalisation for series‐connected LiFePO ₄ battery strings