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A Switched-Coupling-Capacitor Equalizer for Series-Connected Battery Strings …
Due to the low cost, small size, and easy control, the switched-capacitor (SC) equalizer is promising among all types of active cell balancing methods. However, the balancing speed is generally slow and the balancing efficiency is seriously low when the SC equalizer is applied into a long battery string. Therefore, an automatic switched-coupling-capacitor …
A delta-structured switched-capacitor equalizer for series-connected battery strings …
A delta-structured switched-capacitor equalizer (DSSCE) is proposed to achieve the automatic any-cells-to-any-cells (AC2AC) balancing for a long battery string, leading to the fast-speed and high-efficiency balancing. Only two switches are required for each battery cell, and one capacitor is set for any two cells, materializing the delta-structured switched …
Energies | Free Full-Text | An Automatic Switched-Capacitor Cell Balancing Circuit for Series-Connected Battery Strings …
In this paper, a novel voltage equalizer is developed for series battery strings based on the two-phase switched capacitor technique. Different from the conventional voltage equalizers which are developed by switched-mode power converters, bulky magnetic components and complex monitoring and control system are avoided in …
A Star-Structured LC Resonant Switched Capacitor Equalizer for Lithium-ion Battery Strings …
Therefore, an automatic switched-coupling-capacitor equalizer (SCCE) is proposed, which can realize the any-cells-to-any-cells equalization for a battery string. Only two switches and one ...
Design of series resonant switched-capacitor equaliser for series …
This study proposes a series of resonant switched-capacitor (ReSC) voltage equaliser, which realises energy transferred directly from source cells to target …
Powering Electric Cars: The Ultimate Showdown Between Capacitor and Battery Technology
Electric cars have been steadily gaining popularity and have become a significant part of the automobile industry. However, the rising concern for the environment and the depleting energy resources have forced manufacturers to focus on eco-friendly alternatives, and that''s where battery and capacitor-operated electric cars come in. But …
Supercapacitors – A Viable Alternative to Lithium-Ion Battery Technology?
Explore how supercapacitors, offering rapid charging and longevity, compare to lithium-ion batteries in energy storage, highlighting their potential in future technology applications. Introduction Supercapacitors, also called Ultracapacitors, double-layer capacitors, or ...
Zero-Current Switching Switched-Capacitor Zero-Voltage-Gap Automatic Equalization System for Series Battery String …
The series battery string or supercapacitor string automatic equalization system based on quasi-resonant switched-capacitor converter is presented in this paper. It realizes the zero-voltage gap between cells and allows maximum energy recovery in a series battery system or supercapacitor system. It not only inherits the advantage of conventional switched …
Switched capacitor system for automatic series battery equalization
A clocked switched-capacitor circuit can exchange charge between adjacent batteries in a series string. This exchange drives all batteries to identical voltages, without regard to component values, battery technology, or state of charge. This equalization process can proceed while the batteries are in use or under charge, or separately. Transformer-based …
Modeling and Analysis of Series-Parallel Switched-Capacitor …
A series-parallel switched-capacitor (SC) power converter is reconfigured as a new voltage equalization circuitry for series-connected batteries or supercapacitors in this paper. …
A Unitized Multiwinding Transformer-Based Equalization Method for Series-Connected Battery Strings …
Active equalization is an efficient method to improve the performance of series-connected battery strings for the electric vehicles. However, the large-scale applications of the active equalization are restricted by many factors, such as system cost, control complexity, and equalization speed. In this paper, a unitized multiwinding transformer-based equalization …
Zero-Current Switching Switched-Capacitor Zero-Voltage-Gap Automatic Equalization System for Series Battery String
The series battery string or supercapacitor string automatic equalization system based on quasi-resonant switched-capacitor converter is presented in this paper. It realizes the zero-voltage gap between cells and allows maximum energy recovery in a series battery system or supercapacitor system. It not only inherits the …
A Delta-Structured Switched-Capacitor Equalizer for Series …
The classical switched-capacitor (SC) equalizer is widely used in battery management systems because of the accurate balancing and ease of implementation. However, it …
An Automatic Switched-Capacitor Cell Balancing Circuit for …
Switched-capacitor (SC) voltage equalizers, as the third voltage balancing technology, are developed by using SC converters to directly transfer charge from the higher voltage …
Equalization circuit topologies of lithium battery strings: a brief …
Therefore, an automatic switched-coupling-capacitor equalizer (SCCE) is proposed, which can realize the any-cells-to-any-cells equalization for a battery string. Only two switches and one ...
A Switched-Coupling-Capacitor Equalizer for Series-Connected Battery Strings …
Due to the low cost, small size, and easy control, the switched-capacitor (SC) equalizer is promising among all types of active cell balancing methods. However, the balancing speed is generally slow and the balancing efficiency is seriously low when the SC equalizer is applied into a long battery string. Therefore, an automatic switched-coupling …
A Modular Cell Balancer Based on Multi-Winding …
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 …
Energies | Free Full-Text | An Automatic Switched …
In this paper, a novel voltage equalizer is developed for series battery strings based on the two-phase switched capacitor technique. Different from the conventional voltage equalizers which are …
Equalization circuit topologies of lithium battery strings: a brief …
Lithium-ion batteries have gradually become the most promising energy storage for smart devices, e-bikes, electric tools, hoverboards, electric vehicles (EVs), etc., compared to other secondary ...
A switched-coupling-capacitor equalizer for series-connected battery strings …
An automatic switched-coupling-capacitor equalizer (SCCE) is proposed, which can realize the any-cells-to-any-cells equalization for a battery string. Only two switches and one capacitor are needed for each battery cell. All MOSFETs are controlled by a pair of complementary PWM signals, and energy can be automatically and directly delivered …
Direct Cell-to-Cell Equalizer for Series Battery String Using Switch-Matrix Single-Capacitor …
In series battery strings, cell-inconsistency is caused by the state-of-charge (SOC) mismatch, nonidentical battery impedance, or different self-discharging rates, and this leads to overcharge and overdischarge. Practically, switched-capacitor equalizers are the most promising means to eliminate the cell inconsistency by virtue of automatic …
A Cell-to-Cell Equalizer Based on Three-Resonant-State Switched-Capacitor Converters for Series-Connected Battery Strings
Due to the low cost, small size, and ease of control, the switched-capacitor (SC) battery equalizers are promising among active balancing methods. However, it is difficult to achieve the full cell equalization for the SC equalizers due to the inevitable voltage drops across Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) switches. Moreover, when …
Design of series resonant switched‐capacitor equaliser for series‐connected battery strings
It improves the energy density of capacitors three times compared with the pure series switched-capacitor equaliser. 7 References 1 Reis A.M., Coleman N.T., Marshall M.W. et al. : '' Comparison of PV module performance before and after 11-years of field exposure ''.
Design of series resonant switched-capacitor equaliser for series-connected battery strings
The traditional pure switched-capacitor equaliser brings the large inrush current and low energy density. This study proposes a series of resonant switched-capacitor (ReSC) voltage equaliser, which realises energy transferred directly from source cells to target cells ...
Modeling and Analysis of Series-Parallel Switched-Capacitor Voltage Equalizer for Battery/Supercapacitor Strings …
Modeling and Analysis of Series-Parallel Switched-Capacitor Voltage Equalizer for Battery/Supercapacitor Strings. / Ye, Yuanmao; Cheng, Ka Wai Eric. In: IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. …
Design of Parallel Resonant Switched-Capacitor Equalizer for Series-Connected Battery Strings …
The results show that the PReSCE circuit eliminates the inrush current and increases the balance speed three times than the parallel pure switched-capacitor equalizer. The traditional pure switched-capacitor equalizer suffers from a large inrush current and low balance speed. An automatic parallel resonant switched-capacitor …
Design of series resonant switched-capacitor equaliser for series-connected battery strings
The traditional pure switched-capacitor equaliser brings the large inrush current and low energy density. This study proposes a series of resonant switched-capacitor (ReSC) voltage equaliser, which realises energy transferred directly from source cells to target cells ...
A star-structured switched-capacitor equalizer for series-connected battery strings …
A series of star-structured switched-capacitor equalizers (SSSCEs) are proposed to achieve high balancing speed and efficiency independent of the cell number and the cell voltage distribution without significant influences on the size, cost, control, and reliability compared with the classical switched-capacitor equalizer (CSCE). The proposed topologies use the …
An Optimized Mesh-Structured Switched-Capacitor Equalizer for Lithium-Ion Battery Strings …
The existing switched-capacitor (SC)-based equalizers either have slow equalizing speed and low efficiency or have bulky volume and low reliability. Therefore, an optimized mesh-structured SC equalizer (MSSCE) is introduced to achieve a tradeoff between the equalization performances and size as well as cost. The proposed MSSCE …
Analysis and Optimization of Star-Structured Switched-Capacitor …
Analysis and Optimization of Star-Structured Switched-Capacitor Equalizers for Series-Connected Battery Strings Abstract: Due to the adjacent cell-to-cell equalization, the …
An any-unit-to-any-unit method for hybrid-structured voltage …
In order to reduce the number of energy conversion processes and achieve leapfrog transmission of energy, a hybrid-structured voltage equalizer (HSVE) is developed in this …
Capacitor vs. Battery: What''s the Difference?
We don''t use capacitors as batteries because they can''t store as much energy as batteries, and they also can only handle current in one direction. Additionally, capacitors are usually much smaller in size and weight than batteries, which means they are not suitable for applications that require a lot of energy or that need to be charged or …
A Star-Structured LC Resonant Switched Capacitor Equalizer for Lithium-ion Battery Strings …
The enhancement of balancing speed as well as fully equalization is a great challenge in switched capacitor (SC) based cell voltage equalizers. In this study, a star-structured LC resonant SC equalizer is proposed to equalize the unbalance cell voltages completely within minimum time. An inductor is used in series with each capacitors of the proposed …
A Low-Cost Multiwinding Transformer Balancing Topology for Retired Series-Connected Battery String …
The traditional balance circuit is employed to balance the retired battery string. It will occupy some space for the extra switches, inductors, or/and capacitors of the energy storage system. This letter is trying to share the inductor of the dc-dc converter with the balance system by utilizing the current ripple on the inductor of the multiwinding …
Energies | Free Full-Text | A Novel Layered Bidirectional Equalizer Based on a Buck-Boost Converter for Series-Connected Battery Strings …
To eliminate the influence of the inconsistency on the cycle life and the available capacity of battery packs, and improve the balancing speed, a novel inductor-based layered bidirectional equalizer (IBLBE) is proposed. The equalizer is composed of two layers of balancing circuits connected in parallel. Each layer contains multiple balancing …
A Delta-Structured Switched-Capacitor Equalizer for Series-Connected Battery Strings …
The classical switched-capacitor (SC) equalizer is widely used in battery management systems because of the accurate balancing and ease of implementation. However, it only achieves the adjacent cell-to-cell equalization, and its balancing speed and efficiency become extremely low for multicell series-connected battery strings. Therefore, a delta …
An automatic switched-capacitor cell balancing circuit for series …
In this paper, a novel voltage equalizer is developed for series battery strings based on the two-phase switched capacitor technique. Different from the conventional voltage …