A Effective Equalization Based on Multi-Mode for Series Grouped Battery Strings

2012 ◽  
Vol 605-607 ◽  
pp. 1908-1912
Author(s):  
Shu Mei Zhang ◽  
Lin Yanig
Keyword(s):  
Lithium Ion Batteries ◽  
Simple Technique ◽  
Lithium Ion ◽  
Life Time ◽  
Battery Voltage ◽  
Design Considerations ◽  
Circuit Technique ◽  
Multi Mode ◽  
Battery Cells

In applications of lithium-ion batteries, a equalizer is required to enhance life time and guarantee safety. A simple technique that provides effective equalization in terms of battery voltage for a series string of battery cells is presented. The mainly circuit technique of two-level DC/DC converters substantially simplify the structure. Moreover, multi-mode equalizing algorithm effectively enhances the uniformity of batteries. The operational principles and design considerations are verified and equalization performance is greatly improved compared with ordinary methods.

scholarly journals Characterization of the Compressive Load on a Lithium-Ion Battery for Electric Vehicle Application

Machines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 71
Author(s):  
Seyed Saeed Madani ◽  
Erik Schaltz ◽  
Søren Knudsen Kær
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Electric Vehicles ◽  
Large Scale ◽  
Electrochemical Impedance ◽  
Applied Pressure ◽  
Lithium Ion ◽  
Battery Cells

Lithium-ion batteries are being implemented in different large-scale applications, including aerospace and electric vehicles. For these utilizations, it is essential to improve battery cells with a great life cycle because a battery substitute is costly. For their implementation in real applications, lithium-ion battery cells undergo extension during the course of discharging and charging. To avoid disconnection among battery pack ingredients and deformity during cycling, compacting force is exerted to battery packs in electric vehicles. This research used a mechanical design feature that can address these issues. This investigation exhibits a comprehensive description of the experimental setup that can be used for battery testing under pressure to consider lithium-ion batteries’ safety, which could be employed in electrified transportation. Besides, this investigation strives to demonstrate how exterior force affects a lithium-ion battery cell’s performance and behavior corresponding to static exterior force by monitoring the applied pressure at the dissimilar state of charge. Electrochemical impedance spectroscopy was used as the primary technique for this research. It was concluded that the profiles of the achieved spectrums from the experiments seem entirely dissimilar in comparison with the cases without external pressure. By employing electrochemical impedance spectroscopy, it was noticed that the pure ohmic resistance, which is related to ion transport resistance of the separator, could substantially result in the corresponding resistance increase.

scholarly journals Effect of Current Rate and Prior Cycling on the Coulombic Efficiency of a Lithium-Ion Battery

Batteries ◽  
2019 ◽  
Vol 5 (3) ◽  
pp. 57 ◽  
Author(s):  
Seyed Madani ◽  
Erik Schaltz ◽  
Søren Knudsen Kær
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Degradation Behavior ◽  
Battery Cell ◽  
The Third ◽  
Capacity Loss ◽  
Battery Cells

The determination of coulombic efficiency of the lithium-ion batteries can contribute to comprehend better their degradation behavior. In this research, the coulombic efficiency and capacity loss of three lithium-ion batteries at different current rates (C) were investigated. Two new battery cells were discharged and charged at 0.4 C and 0.8 C for twenty times to monitor the variations in the aging and coulombic efficiency of the battery cell. In addition, prior cycling was applied to the third battery cell which consist of charging and discharging with 0.2 C, 0.4 C, 0.6 C, and 0.8 C current rates and each of them twenty times. The coulombic efficiency of the new battery cells was compared with the cycled one. The experiments demonstrated that approximately all the charge that was stored in the battery cell was extracted out of the battery cell, even at the bigger charging and discharging currents. The average capacity loss rates for discharge and charge during 0.8 C were approximately 0.44% and 0.45% per cycle, correspondingly.

scholarly journals Comparative Analysis of an Off-grid PV System for Different Types of Batteries

2018 ◽  
Vol 9 (1) ◽  
pp. 11-19
Author(s):  
Rebeka Raff ◽  
Velimir Golub ◽  
Jurica Perko
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Life Time ◽  
Optimal Size ◽  
Pv System ◽  
Eligibility Criteria ◽  
Proposed Model ◽  
Different Types ◽  
Daily Load ◽  
Lead Acid

The aim of this paper is to find an optimal size of different components of an off-grid PV system in the HOMER software with different types of batteries (lead-acid batteries and lithium-ion batteries). The proposed model shows the optimal size of the off-grid PV system for a holiday cottage with regard to eligibility criteria for various types of batteries and the net present cost (NPC). The observed off-grid PV system consists of PV modules, a load, a converter and batteries and it is modelled in the HOMER software. The load is modelled with a daily load diagram for the holiday cottage. For lead-acid and lithium-ion batteries the optimal size of different components of an off-grid PV system for five different scenarios (in respect of the price and life-time) is obtained. In addition, the optimal size of the presented model with respect to different values of capacity shortage ranging from 0% to 5% is presented

scholarly journals A Path Planning Strategy with Ant Colony Algorithm for Series Connected Batteries

Electronics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1816
Author(s):  
Yang Chen ◽  
Teng Shen ◽  
Shiyan Yang ◽  
Xiaofang Liu ◽  
Ru Yang ◽  
...  
Keyword(s):  
Path Planning ◽  
Lithium Ion Batteries ◽  
Ant Colony Algorithm ◽  
Graph Model ◽  
Lithium Ion ◽  
Operating Conditions ◽  
Ant Colony ◽  
Planning Strategy ◽  
Battery Cells

This article presents a path planning strategy with ant colony algorithm for series connected batteries. The motive of this paper is the increasing need for efficient and fast equalization for Lithium-ion batteries. There are many great papers on the design of the equalization circuits. However, they lack the part of path planning strategy for the balancing circuits. To solve this issue, we adopt the graph model to represent the balancing paths among different battery cells and then construct two optimal models based on the best efficiency and speed, respectively. Finally, ant colony algorithm is used to solve these two models. This makes it possible to achieve different goals according to the practical operating conditions. We validate the function of the proposed path planning strategy through an example of 13 series connected battery balancing system.

scholarly journals The Effect of Ratio LiBOB:TiO2 of Electrolyte Polymer Sheets as separators on the Electrochemical Performance of LTO-Based Lithium-Ion Batteries

2019 ◽  
Vol 22 (4) ◽  
pp. 136-142
Author(s):  
Agriccia Pangestica Saputry ◽  
Titik Lestariningsih ◽  
Yayuk Astuti
Keyword(s):  
Lithium Ion Batteries ◽  
Work Stress ◽  
Lithium Batteries ◽  
Electrochemical Impedance ◽  
Lithium Ion ◽  
Electrolyte Solutions ◽  
Battery Voltage ◽  
Battery Cell ◽  
Polymer Sheets ◽  
Eis Analysis

LTO anode-based Ion-Lithium batteries with artificial polymer electrolyte sheets consisting of PVdF-HFP, TiO2, and LiBOB as well as commercial sheets and with electrolyte solutions LiTFSI and LiPF6 have been made by assembling method. The changing variables in this study were the ratio between TiO2 and LiBOB for separator sheets and types of electrolytes used, namely, LiTFSI and LiPF6. Some characterizations were undertaken to determine battery performance including battery voltage determination, Cyclic Voltammetry (CV) testing to measure battery cell performance, and Electrochemical Impedance Spectrometry (EIS) analysis to measure battery conductivity values. The results showed that the presence of LiBOB and TiO2 at the separator in the battery can improve the performance of LTO-based lithium batteries. Artificial separator sheets with a composition ratio of TiO2: LiBOB of 5:25 with electrolyte solution LiPF6 which produces work stress, potential difference, and ionic conductivity of 3.06 V; 0.3 V; and 1.486x10-6 Scm-1 is the best possible to be applied to lithium-ion batteries.

3,7-Bis(trifluoromethyl)-N-ethylphenothiazine: a redox shuttle with extensive overcharge protection in lithium-ion batteries

2014 ◽  
Vol 2 (43) ◽  
pp. 18190-18193 ◽  
Author(s):  
Aman Preet Kaur ◽  
Selin Ergun ◽  
Corrine F. Elliott ◽  
Susan A. Odom
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Battery Voltage ◽  
Electrolyte Additives ◽  
Redox Shuttle ◽  
Synthetic Graphite ◽  
Overcharge Protection

Constant overcharging of LiFePO4/synthetic graphite lithium-ion batteries in which the electrolyte additives 1,4-di-tert-butyl-2,5-dimethoxybenzene (DBB), N-ethylphenothiazine (EPT), and 3,7-bis(trifluoromethyl)-N-ethylphenothiazine (BCF3EPT) limit battery voltage.

scholarly journals Photovoltaics- and Battery-Based Power Network as Sustainable Source of Electric Power

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5048
Author(s):  
Prahaladh Paniyil ◽  
Vishwas Powar ◽  
Rajendra Singh ◽  
Benjamin Hennigan ◽  
Pamela Lule ◽  
...  
Keyword(s):  
Power Generation ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Feasibility Analysis ◽  
Economic Viability ◽  
Design Parameters ◽  
Energy Sources ◽  
Power Network ◽  
Design Considerations ◽  
Sustainable Power

With the rise in the utilization of free fuel energy sources, namely solar and wind, across the globe, it has become necessary to study and implement models of a sustainable power network. This paper focuses on the design of a conceptual power network based on photovoltaics (PV) for power generation and lithium-ion batteries for storage. The power system showcases the various metrics that are involved in a grid-tied PV- and battery-based power network. It also encompasses the various design parameters and sizing considerations to design and conceptualize such a power network. The model focuses on the importance of the conservation of power by avoiding wastage of generated power through inverter sizing and design considerations. Finally, an economic and feasibility analysis is carried out to showcase the economic viability of the PV- and battery-based power network in today’s alternating current (AC)-based grid.

scholarly journals Evaluation of Equivalent Circuit Diagrams and Transfer Functions for Modeling of Lithium-Ion Batteries

2013 ◽  
Vol 2 (1) ◽  
pp. 34-39 ◽  
Author(s):  
Ahmad Rahmoun ◽  
Helmuth Biechl ◽  
Argo Rosin
Keyword(s):  
Energy Storage ◽  
Lithium Ion Batteries ◽  
Equivalent Circuit ◽  
Transfer Functions ◽  
Lithium Ion ◽  
Life Time ◽  
Rational Functions ◽  
Model Parameters ◽  
Energy Storage Devices ◽  
The Time Domain

AbstractThe rapid developments in the field of electrochemistry, enabled lithium-ion batteries to achieve a very good position among all the other types of energy storage devices. Therefore they became an essential component in most of the modern portable and stationary energy storage applications, where the specific energy and the life time play an important role. In order to analyze and optimize lithium-ion batteries an accurate battery model for the dynamic behavior is required. At the beginning of this paper four different categories of electrical models for li-ion cells are presented. In the next step a comparison between equivalent circuit diagrams and fractional rational functions with the complex variable s is shown for lithium-ion battery modeling. It is described how to identify the parameters of the models in the time domain and also in frequency domain. The validation of the different models is made for high and low dynamic current profiles. In the first step the dependency of all model parameters on the temperature and on the battery age is neglected. These effects will be taken into account in the continuation of this work

scholarly journals HIGH PERFORMANCE NANOWIRE ARRAY BATTERY WITH PRELOADED LITHIUM ION

2019 ◽  
Vol 01 (01) ◽  
pp. 21-29 ◽  
Author(s):  
Nayana P
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
High Performance ◽  
Wire Array ◽  
Nanowire Array ◽  
Lithium Ion ◽  
Life Time ◽  
Essential Requirement ◽  
Gan Nanowire ◽  
Storage Batteries

Electricity playing a major role in the most of the application has become a one of the essential requirement in the existing world. The increased requirement of the electricity has led to the necessity of the rechargeable and the storage batteries and the lithium ion batteries have proved to be an effective in energy storage and the energy conversion for many portable and the implantable devices. Despite the capacities of the lithium ion batteries, the greater pressure on the life time of the battery paves way or the alternative, resulting in the emergence of the nanowires battery arrays. The paper proffers a GaN nanowire arrays integrated with the lithium ion batteries to have high performance Nano wire array –lithium ion battery that inhibits the potentials of the lithium ion battery and the GaN nanowires arrays providing an extended lifetime for the batteries.

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