Lithium-Ion Battery Pack Based on Fuzzy Logic Control Research
In this paper, eight lithium-ion batteries are selected as experimental objects, and the initial SOC values of the eight lithium-ion batteries are shown in Table 2, the initial mean SOC value of the lithium-ion battery pack was 67.5%, the rated voltage of a single lithium-ion battery is 3.7 V, the upper cutoff voltage is 4.2 V, the rated capacity is 5400 mAh, and the
High-efficiency active cell-to-cell balancing circuit for
A high-efficiency active cell-to-cell balancing circuit for Lithium-Ion battery modules is proposed in this paper. By transferring the charge directly from the highest voltage cell to the lowest
Study on Hierarchical Equalization Topology Circuit of Lithium
In this study, an innovative two-layer equalization circuit design is proposed, which is based on a Buck-Boost circuit and a switched-capacitor circuit, and successfully realizes one-to-one and many-to-one equalization within a series-connected energy storage lithium-ion battery pack. The Buck-Boost converter is combined with a bus-based strategy to form a bus-based Buck-Boost
Equalization circuit topologies of lithium battery strings: a brief
Lithium batteries are widely applied in new energy vehicles and related energy storage industries due to their superior performance. The application of an equalization circuit
(PDF) Equalization circuit topologies of lithium battery strings: a
The battery cell equalisation techniques have been an object of research in numerous studies in recent years [1][2][3][4][5][6]. The review of the primary equalisation circuits in [1] presents and
Study on Hierarchical Equalization Topology Circuit of Lithium-ion
In this study, an innovative two-layer equalization circuit design is proposed, which is based on a Buck-Boost circuit and a switched-capacitor circuit, and successfully realizes one-to-one and
Internal short circuit detection for lithium-ion battery pack
Internal short circuit is one of the unsolved safety problems that may trigger the thermal runaway of lithium-ion batteries. This paper aims to detect the internal short circuit that occurs in battery pack with parallel-series hybrid connections based on the symmetrical loop circuit topology.The theory of the symmetrical loop circuit topology answers the question that:
Active Methods for the Equalization of a
Due to their long lifespan and high energy density, lithium-ion batteries are now the preferred source of power for electric vehicles. However, due to various factors in
A Novel Active Equalization Topology for Series-Connected Lithium
A novel non-dissipative two-stage equalization circuit topology based on the traditional Buck-Boost circuit is proposed to achieve balancing of series-connected lithium-ion battery packs with
A novel double-layer active equalization scheme for lithium-ion
Lithium-ion batteries are widely used because of high power, energy density, long life and low environmental pollution [4], [5]. However, the small voltage of a single cell is not enough to meet the needs of electrical equipment. The intergroup equalization adopted the SS topology with a buck circuit, which connects the battery packs for
Bidirectional Active Equalization Control of Lithium Battery Pack
Aiming at the energy inconsistency of each battery during the use of lithium-ion batteries (LIBs), a bidirectional active equalization topology of lithium battery packs based on energy transfer
A Novel Active Cell Balancing Circuit and
A novel, active cell balancing circuit and charging strategy in lithium battery pack is proposed in this paper. The active cell balancing circuit mainly consists of a battery
Advancement of lithium-ion battery cells voltage equalization
Many lithium-ion battery cells are usually connected in series to meet the voltage requirements. The voltages of the entire series-connected battery cells in a battery pack should be equal. A suitable logic control is essential for this equalizer, especially to avoid short circuit among battery cells. This topology also helps to reduce
Design and implementation of an inductor based cell balancing circuit
The chemical structure of lithium-ion (LIB) batteries is particularly vulnerable to overcharging and deep discharge, which may damage the battery, reduce its life, and even cause dangerous things.
Research on equalization scheme of lithium-ion battery packs
Aiming at the inconsistency problem of series-connected lithium-ion battery packs in use, this article proposes a two-level balanced topology based on bidirectional Sepic
Lithium-ion battery state-of-charge balancing circuit using single
The series of energy storage devices, namely battery, super/ultra-capacitor string voltage balancing circuit, based on a single LC energy converter, is presented in this paper transfers the excess energy directly from the higher cell to the lower cell in the string. This requires n-4 bidirectional MOSFET switches and a single LC tank for n number of energy
A novel active cell balancing topology for serially connected Li-ion
In a Battery Management System (BMS), cell balancing plays an essential role in mitigating inconsistencies of state of charge (SoCs) in lithium-ion (Li-ion) cells in a battery
A novel active cell balancing topology for serially connected Li-ion
Lithium-ion (Li-ion) batteries o˛er several key advantages, including high energy and power density, a low self-leakage rate (battery loses its charge over time when not in use), the absence of a
Research on Equalization Technology of Lithium Battery Based on
Lithium batteries are known for their high energy density, extended lifespan, fast charging capability, low self-discharge rate, as well as environmen- ization of each battery cell on the circuit topology of a bidirectional flyback converter. However, this method requires accurate system modeling and the algorithm is difficult
Lithium-Ion Battery Pack Based on Fuzzy Logic Control Research
In order to solve the problem of inconsistent energy in the charging and discharging cycles of lithium-ion battery packs, a new multilayer equilibrium topology is
An optimal self-heating strategy for lithium-ion batteries with
However, lithium-ion batteries, which serve as the energy storage unit for electric vehicles, experience a rapid decline in power supply ability at cold temperatures. For the heating circuit topology, the battery self-heater is a promising approach that utilizes the power of the battery to generate heat. Traditional self-heating methods
A comparison of battery-charger topologies for portable applications
capabilities, the charger integrated circuit (IC) must be able to interface and charge the battery with all of the chosen sources. Battery-charger topologies for Lithium-ion batteries A battery-charger IC takes power from a DC input source and uses it to charge a battery. This power conversion can be achieved via different topologies, each
Balancing Topology Research of Lithium-Ion Battery Pack
This paper studies lithium-ion battery pack topology, analyze different structures'' characteristics, including balancing rate, balancing efficiency, cost and control difficulty, summarize the advantages and disadvantages of each type, and compare their application effects in different scenarios. Li, K., Zong, X., Liu, Q.: Design of an
Internal short circuit detection for lithium-ion battery pack
The theory of the symmetrical loop circuit topology answers the question that: 1) How to locate an exact internal short circuit fault in a battery pack with hybrid electric connections. Fault diagnosis and quantitative analysis of micro-short circuits for lithium-ion batteries in battery packs. J. Power Sources, 395 (2018), pp. 358-368, 10.
Active Equalization of Lithium Battery Based on WOA and FLC
Lithium battery as the core component of electric vehicle They have the advantages of high safety, long life, and low cost [].Overcharge or overdischarge of battery cells will reduce the life of the entire battery pack, increase the aging speed, and may even cause safety problems [] order to improve the endurance and service life of electric vehicles during
Modular balancing strategy for lithium battery pack based on
Lithium batteries have been extensively employed in electric vehicles and energy storage power stations due of their high power and energy balanced topology with a centralized topology as the intra-group circuit and an adjacent topology as the inter-group circuit. This topology performs well in terms of balanced speed and energy utilization
Research progress of energy equalization topology of power lithium
equalization circuit, which provides a strong guarantee for the efficient output and stable operation of lithium-ion batteries. This paper summarizes the current equilibrium topology of lithium-ion battery pack by summarizing and combing various types of existing equilibrium structures. According to the development
Aircraft lithium battery energy balancing method based on
The battery pack balancing circuit model is illustrated in Fig. 7. For this model, a ternary lithium battery type is selected with a nominal voltage of 3.6 V, charging cutoff voltage of 4.2 V, discharging cutoff voltage of 2.75 V, and rated capacity of 2.2 Ah. Seven ternary lithium battery cells are arranged in series for simulation experiments.
Active Equalization of Lithium-Ion Battery Based on Reconfigurable Topology
Appl. Sci. 2023, 13, 1154 3 of 19 cell is selected as the topology of the inner layer. It is suitable for large-scale energy storage applications because it can improve the balancing efficiency
Pack-to-Multicell Equalization of Lithium Battery String Based on
This paper proposes a novel pack-to-multicell topology to equalize the voltage distribution of a series lithium battery pack. Switched-capacitor converters are implemented in a series-parallel configuration to simultaneously allow energy transfer from the entire pack to every cell. Those switched capacitors act as intermediary energy storage on equalization paths between each
Active Equalization of Lithium-Ion Battery
To solve these problems, in this study, we adopted a new battery balancing topology called reconfigurable topology, which can isolate the lowest SOC (state of charge)
Bidirectional Active Equalization Control of Lithium Battery Pack
Aiming at the energy inconsistency of each battery during the use of lithium-ion batteries (LIBs), a bidirectional active equalization topology of lithium battery packs based on energy transfer was constructed, and a bivariate equalization control strategy of adjacent SOC
Novel Reconfigurable Topology-Enabled Hierarchical Equalization
Available capacity of lithium-ion batteries is directly linked to the mileage of the electric vehicle. The cell imbalance is recognized as a significant concern hindering the full utilization of pack capacity. Following the emerging concept of battery reconfiguration, this article proposes a dual-scale hierarchical equalization scheme enabled by a novel four-switch reconfigurable topology.
(PDF) Active Equalization of Lithium-Ion Battery
The inner layer uses the reconfigurable topology to have a balanced set of battery cells. Lithium-ion batteries are usually connected The simulation of a 12 battery cell circuit built on
Pack-to-Multicell Equalization of Lithium Battery String Based on
This paper proposes a novel pack-to-multicell topology to equalize the voltage distribution of a series lithium battery pack. Switched-capacitor converters are
Temperature-considered active balancing strategy for lithium-ion
4 天之前· Research on battery balancing can be divided into two parts: balancing topology and balancing strategy [7].Currently, most of the balancing topologies used in electric vehicles are passive balancing topologies, which connect parallel resistors on every cell and dissipates the energy as heat [8].These topologies are simple to control and cost-effective.
Internal Short Circuit Warning Method of Parallel Lithium
There are many reasons for triggering the internal short circuit of lithium-ion batteries, which can be divided into three categories: Mechanical abuse, electrical abuse, and thermal abuse. Mechanical abuse includes collision, extrusion, Through this topology, the device can detect and record the loop current of the two branches and the
A novel double-layer active equalization scheme for lithium-ion
The intergroup equalization adopted the SS topology with a buck circuit, which connects the battery packs for equalization through switching arrays. Taking into account the
A novel active equalization topology for series-connected lithium
efficient balancing of lithium-ion battery packs without adding additional devices. The proposed topology is validated by simulation in MATLAB-Simulink firstly, based on accurate mode
6 FAQs about [Lithium battery topology circuit]
Can reconfigurable topology solve battery balancing problems?
To solve these problems, in this study, we adopted a new battery balancing topology called reconfigurable topology, which can isolate the lowest SOC (state of charge) battery cell or the faulty battery cell without affecting the normal operation of other cells in the pack.
What is a battery topology & how does it work?
In this topology, energy is exchanged between modules through a boost circuit, and battery energy inside the module is exchanged using multiple multifaceted transformers. The design offers the advantages of high equalization accuracy and the ability to adjust equalization currents as required.
Does a designed topology solve a series-connected battery pack inconsistency?
The experimental results demonstrate that the designed topology has better equalization performance under different initial SOC distributions and switching frequencies. It verifies that the equilibrium model is able to effectively solve the inconsistency of the series-connected battery packs. 1. Introduction
Why are lithium-ion batteries connected in series and parallel?
Lithium-ion batteries are usually connected in series and parallel to meet the voltage and power requirements of loads because of the low voltage and capacity of one single battery [ 4 ]. The origination of inconsistency of lithium-ion batteries can usually be separated into the production process and the usage process [ 5 ].
What is a lithium battery equalization circuit?
Lithium batteries are widely applied in new energy vehicles and related energy storage industries due to their superior performance. The application of an equalization circuit can effectively reduce the inconsistency of the energy of the battery pack, thereby extending the service life of the battery pack.
How to quantify the equalization effect of series-connected lithium-ion battery groups?
To better quantify the equalization effect, the battery difference and energy utilization rate are defined for evaluation. In order to address the inconsistency problem of series-connected lithium-ion battery groups in practice, a two-level balanced topology based on bidirectional Sepic-Zeta circuit is designed in this article.
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