Battery Management System—Balancing Modularization Based on a Single Switched Capacitor and Bi-Directional DC/DC Converter with the Auxiliary Battery---Mohamed DAOWD-

Battery Management System—Balancing Modularization Based on a Single Switched Capacitor and Bi-Directional DC/DC Converter with the Auxiliary Battery Mohamed Daowd *, Mailier Antoine, Noshin Omar, Philippe Lataire, Peter Van Den Bossche and Joeri Van Mierlo Department of Electrical Engineering and Energy Technology 

 Abstract:

 Lithium-based batteries are considered as the most advanced batteries technology, which can be designed for high energy or high power storage systems. However, the battery cells are never fully identical due to the fabrication process, surrounding environment factors and differences between the cells tend to grow if no measures are taken. In order to have a high performance battery system, the battery cells should be continuously balanced for maintain the variation between the cells as small as possible. Without an appropriate balancing system, the individual cell voltages will differ over time and battery system capacity will decrease quickly. These issues will limit the electric range of the electric vehicle (EV) and some cells will undergo higher stress, whereby the cycle life of these cells will be shorter. Quite a lot of cell balancing/equalization topologies have been previously proposed. These balancing topologies can be categorized into passive and active balancing. Active topologies are categorized according to the active element used for storing the energy such as capacitor and/or inductive component as well as controlling switches or converters. This paper proposes an intelligent battery management system (BMS) including a battery pack charging and discharging control with a battery pack thermal management system. The BMS user input/output interfacing. The battery balancing system is based on battery pack modularization architecture. The proposed modularized balancing system has different equalization systems that operate inside and outside the modules. Innovative single switched capacitor (SSC) control strategy is proposed to balance between the battery cells in the module (inside module balancing, IMB). Novel utilization of isolated bidirectional DC/DC converter (IBC) is proposed to balance between the modules with the aid of the EV auxiliary battery (AB). Finally an experimental step-up has been implemented for the validation of the proposed balancing system.

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https://www.academia.edu/23460584/Battery_Management_System_Balancing_Modularization_Based_on_a_Single_Switched_Capacitor_and_Bi_Directional_DC_DC_Converter_with_the_Auxiliary_Battery

Design and Analysis of Maintenance Free Lead Acid Battery System Used in UPS-Pratik Roy University of Windsor

  Design and Analysis of Maintenance Free Lead Acid Battery System Used in UPS Pratik Roy, Student Member, IEEE, Varun Kumar Vats, Student Member, IEEE and Pronay Kumar Chakrobarty, Student Member, IEEE 

 Abstract—Voltage interruption can be happened by several reasons like blackout, brownout, noise, spike etc. Those incidents have consequential effect on computer’s hardware such as data losses, burning of sensitive equipment etc. So, UPS broadly called an uninterruptible power supply device is used in computer to provide a backup power source which will maintain the consistency in voltage and flow of electricity which in turn will provide consistent power input. Batteries are used as energy storage device in UPS which store electric energy during charging state and discharge that electric energy during any kind of interruption to provide backup as additional power source for the computer. So, the most important integral part of UPS is the battery pack which is used as energy storage device in UPS. Main goal of this paper is to design the suitable battery pack for UPS so that it can give maximum backup range to the computer within a certain economical range or cost limit. Also, another goal is to analyze the electrical and thermal parameters of the designed battery pack and cell and suggest better solutions to make the wet battery cell maintenance free (no need of addition of water).

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 https://www.academia.edu/37317680/Design_and_Analysis_of_Maintenance_Free_Lead_Acid_Battery_System_Used_in_UPS

A High Gain Single Switch DC-DC Converter with Double Voltage Booster Switched Inductors Nagaraju Addagatla, Rajender Boini-Advances in Science and Technology Research Journal 2023, 17(2), 1–11

 A High Gain Single Switch DC-DC Converter with Double Voltage Booster Switched InductorsNagaraju Addagatla1, Rajender Boini1*1 Department of EEE, Chaitanya (Deemed to be University) Warangal, Telangana, India* Corresponding author’s email:nagaraju.addagatla@gmail.com 

 ABSTRACT

The research for novel power conversion topologies and the development of cutting-edge power component tech-nologies are driven by the demand for renewable and much more efficient electricity generation, delivery, and con-version. Simulation and analysis high voltage gain DC-DC converter with double voltage booster switched induc-tor are analyzed in this paper. Multilevel boost converter topologies recently reintroduced, are gaining popularity as a solution for industrial and transportation power systems because they enable the use of innovative, efficient, but relatively low voltage low-voltage devices at greater voltage and power levels. there is only one power switch on the converter that is planned here, three diodes, two capacitors, and two inductors to achieve ultra-high gain with better efficiency. High voltage gain, minimal switch stress, and the ability to lessen input-current ripple and capacitor voltage ripple are all benefits of the topology. When it switches complementary, the capacitors’ ripple is reduced, which lowers the size requirement for the capacitors. A 12V, 500 watts prototype was analyzed, simulated and designed. at a duty cycle of 0.75 it is achieved high DC-DC gain i.e 19 and efficiency 93%. The practicality of the converter will be demonstrated by the close agreement between the analysis and simulation findings. 

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http://www.astrj.com/pdf-161447-89064filename=A%20High%20Gain%20Single%20Switch.pdf

PONENCIA INTERNACIONAL UPS:SISTEMA DE ENERGIA ININTERRUMPIDA(NOBREAK) -ESCUELA PROFESIONAL INGENIERIA ELECTRICA-UNIVERSIDAD SAN ANTONIO ABAD DEL CUZCO-PERU

 APOYO  ECCOPOWER SISTEMAS ENERGIA -LACERDA SISTEMAS ENERGIA-BRASIL

El capítulo estudiantil de la Sociedad de Energía y Potencia IEEE UNSAAC, los invita a participar de la ponencia a cargo del Ing. Armando W. Cavero Miranda con el fin de ampliar la perspectiva profesional y laboral de los estudiantes de la Escuela Profesional. 📆Fecha: Jueves 21 de Marzo 🕔Hora: 10:00 (GMT-5) Modalidad: Presencial 📍Lugar: Salón de grados de Ingeniería Electrónica

7º Congresso Brasileiro de Eletrônica de Potência - COBEP2003

 Sempre apoiando  a PESQUISA E DESENVOLVIMENTO no BRASIL durante toda minha vida me dediquei a minha paixão a Eletrônica de Potência ,hoje temos muitos Doutores e Mestres em todas as universidades e setores da industria nacional,no novo escenario mundial e muito importante o conhecimento sempre de novas tecnologias.

MOURA uma empresa que enorgulhece o Brasil, com 66 anos de historia lider do setor de baterias AUTOMOTIVAS,INDUSTRIAIS,ESTACIONARIAS,SOLAR

 

https://picasion.com/
Tive a satisfação de visitar a Empresa Moura genuinamente Brasileira junto com meus colegas peruanos Sr. Rodolfo Araujo Diretor da empresa peruana INTERSAC junto com seu filho Edson Araujo e o Sr. Cesar Quintero Gerente de Moura na Colombia,devo expresar meu agradecimento especial a Srta.Debora Daiana Silva Gerente Comercial LATAM | Gestão de Contas | Abertura de Mercado | Expansão de Negócios | Planejamento Estratégico | Liderança e Formação de Equipes,realmente o que mais me impresionou foi sua organização,seu Instituto de Pesquisa e Desenvolvimento,seu proceso de produção e Controle de Qualidade,devo resaltar seu Programa Social com Instituto Moura de Formação Tecnica de jovem talentos de jovens da comunidade da Cidade Bela Jardim,tem cursos de Robótica,Matemáticas,Ciências de \Computação e aulas de musica,e um Cinema,todos estes serviços são totalmente gratuitos, alem de isso continuan expandiendo seus investimentos no desenvolvimento de novas aplicações no setor de energia como os automoveis elétricos,desejo que o sucesso continue.

Muito Obrigado Moura.

리튬 배터리의 화재 및 폭발 위험성에 관한 연구 A Study on the Explosion and Fire Risk of the Lithium Battery-Author Sang-Bo Sim- Hoseo University

리튬 배터리의 화재 및 폭발 위험성에 관한 연구 A Study on the Explosion and Fire Risk of the Lithium Battery-Author Sang-Bo Sim- Hoseo University

ABSTRACT 

Due to recent development of IT technology, information level of Korea is said to be the world-best. Thus mobile devices such as cell phones, notebook, and tablet PC that could be used without limitations are trending. Along the trend, high energy high density secondary batteries used as the power source for portable devices are also in the spotlight, and among them Lithium battery demand is rising. Generally a Lithium battery should be certified with KS C 8541 (Lithium secondary battery rule) in order to be on the market. However, battery accidents are growing in number and people are raising questions about the safety of the batteries. Certified Lithium battery’s safety is guaranteed within normal state, but at abnormal states such as damage to protective circuit, the danger rises due to elimination of minimum protection. Recent studies regarding Lithium batteries only measured ignition status for flammable gas, but did not provide detailed analysis. Also, risk analysis according to battery capacity and comparative analysis between the two representative batteries, Lithium Polymer battery and Lithium Ion battery are rarely carried out. Also, research about general danger of Lithium batteries such as ignition at high temperature environment is incomplete. This study selected five types of Li-Polymer batteries and three types of Li-Ion batteries of different capacity in order to analyze ignition and fire danger according to usage environment. The results are as following. 1. We designed an ignition circuit using IEC type spark ignition test apparatus based on KS C IEC 60079-11 standard in order to measure the explosion hazard of Lithium battery spark discharge. Through measuring the ignition limit of methane, propane, ethylene, and helium, the result showed that gas with higher danger showed more explosion to less number of battery connection. Also, batteries with not Protection Circuit Module (PCM) exploded more often during connection with battery compared with batteries that had protection circuits. 2. An experiment was conduction using a pyrostat based on UL 1642 and KS C 8541 standard in order to measure Lithium battery’s explosion danger at high temperature environment. As the result, Li-Polymer batter with pack type external material had higher risk of explosion compared to cap type Li-Ion battery. Li-Polymer battery had 160~170℃ explosion between 1970~2700 seconds, and the explosion occurred for the electrolytes seeped out from the cracked battery pack after swelling due to evaporation. On the other hand, Li-Ion battery had 176~197℃ explosion between 3000~3800 seconds caused by vaporized electrolyte increasing the pressure within the battery and protruding to the vulnerable positive (+) end. 3. Short circuit was designed in order to measure the temperature increase according to the short circuit current. For batteries with protection circuit, there was no temperature change caused by short circuit current due to current limitation. However, for batteries with no protection circuit, 30.7~35.6A of maximum short circuit current was produced. For Li-Polymer battery, the current fell until 3.9~12.7A after the maximum short circuit current, but increased again to 5.5~17.8A, showing two-step curve pattern. The maximum temperature was 125℃. For Li-Ion battery, the maximum short circuit current fell steeply to 1.3A and decreased steadily, showing a single step curve pattern. It is because the PTC thermistor embed inside limited the flowing current. The maximum temperature was 95℃. Thus in order to minimize the danger of Lithium battery explosion, the Lithium battery connection number and discharge characteristics should be considered when used at environment with flammable gas. And swelling and explosive characteristics should be considered when using Li-Polymer and Li-Ion batteries at high temperature environment. Also, to prevent hazards caused by mistakes and abnormal statues, a dual safety device of protection circuits are recommended.

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Задачник по физике. Чертов А.Г., Воробьев А.А. -Problem in physics. Chertov A.G., Vorobiev A.A. -

 

-Problem in physics. Chertov A.G., Vorobiev A.A. 

 The problem book was compiled in accordance with the current syllabus for the physics course for college students. Each section includes a sufficient number of tasks, the difficulty of which increases with increasing serial number. At the beginning of each paragraph, basic laws and formulas are given, and examples of solving typical problems are given. At the end of the book, answers to all problems are given. The 7th edition (6th - 1997) includes more than 150 new problems and examples, the theoretical part of each section has been significantly expanded, and the necessary corrections have been made. For students of higher technical educational institutions.

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https://drive.google.com/file/d/1lbWLmycZjLjj9uSJmuXtZUTgIho3hCJK/view?usp=sharing

Collected Papers Of P. L. Kapitza -PRIMER VOLUME-TOMO i

 

Collected Papers of P. L. Kapitza, Volume I 

Compiles the scientific papers written between 1916 and 1934 by Piotr Leonidovich Kapitza, a leading Soviet physicist and Nobel laureate. This book begins by introducing the life and career of P. L. Kapitza, which includes his studies and investigations of nuclear physics, strong magnetic fields, liquefaction, liquid helium, and high-power electronics. Other topics discussed include electron inertia in molecular ampere currents; Koch recording microphotometer; metallic conductivity and its change in a magnetic field; and methods of experimenting in strong magnetic fields. The liquefaction of helium by an adiabatic method; Zeeman and Paschen-Back effects in strong magnetic fields; and theoretical and empirical expressions for the heat transfer are also emphasized in this text. This compilation is a good reference for students and researchers conducting work on the biography and scientific contributions of P. L. Kapitza. 

 Volume 1 here:

https://archive.org/details/collected-papers-of-p.-l.-kapitza-volume-1

ДОВУДОВ Сарфароз Умедович ПОВЫШЕНИЕ ЭНЕРГЕТИЧЕСКОЙ ЭФФЕКТИВНОСТИ АВТОМАТИЗИРОВАННЫХ ЭЛЕКТРОПРИВОДОВ НА ОСНОВЕ ИСПОЛЬЗОВАНИЯ ЧАСТОТНО-ИМПУЛЬСНОЙ МОДУЛЯЦИ------DOVUDOV Sarfaroz Umedovich AUMENTANDO A EFICIÊNCIA ENERGÉTICA ACIONAMENTOS ELÉTRICOS AUTOMATIZADOS BASEADOS EM USANDO MODULAÇÃO DE FREQUÊNCIA DE PULSO

INTRODUÇÃO 

Relevância do tema de pesquisa da dissertação. Acionamentos elétricos automatizados (DEA) de corrente contínua e alternada constituem uma parte importante dos equipamentos industriais modernos para sistemas de produção e transporte [1-3]. Ao mesmo tempo, a qualidade do controle e o desempenho energético dos acionamentos elétricos dependem significativamente dos algoritmos de controle utilizados. Atualmente, o método de controle mais popular para DEAs de corrente contínua e alternada pode ser considerado um método de controle usando modulação por largura de pulso (PWM), que pode fornecer os parâmetros necessários para controlar a velocidade angular de motores elétricos [3-5]. Tais tipos de PWM provaram-se tecnicamente bem, como modulação única, PWM senoidal, PWM com introdução de um terceiro harmônico, etc. [4-34]. Uma contribuição significativa para o desenvolvimento da teoria dos sistemas de controle pulsado para motores elétricos de corrente contínua e alternada foi feita pelos trabalhos científicos de G.A. Belova, O.G. Bulatova, A.I. Tsarenko, B.Yu. Vasilyeva, B.I. Firago, K, Hasse, F. Blaschke, SR. Bowes, D. Holliday, S. Grewal e outros pesquisadores. Os fundamentos metodológicos da pesquisa na área de controle de motores elétricos são estabelecidos nos trabalhos de A.G. Ivanova, A.S. Sandler, R.T. Schreiner, S.G. Alemão-Galkin, Yu.A. Sabinina, M.P. Kostenko, I. Takahashi, T. Noguchi e outros cientistas [3, 7, 10, 14]. No entanto, o método de controle PWM apresenta uma série de desvantagens em relação à sua eficiência energética: perdas dinâmicas significativas de potência causadas pelos processos de ligar e desligar as chaves semicondutoras do conversor de potência controlado e a eficiência relativamente baixa do conversor PWM - gerenciamento. Aumentando a eficiência energética de conversores semicondutores pulsados ​​de potência (PSCs) para sistemas elétricos automatizados 7 A movimentação de complexos de produção industrial pode ser facilitada pelo uso de modulação de frequência de pulso (PFM) [22, 24, 27, 35, 36]. No entanto, deve-se notar que este método de controle como parte de um DEA ainda não foi totalmente estudado. Este trabalho se dedica a melhorar a eficiência do DEA de complexos produtivos industriais baseados no uso de PFM. O objetivo do estudo é utilizar modulação em frequência de pulso da tensão de alimentação para aumentar a eficiência energética de acionamentos elétricos automatizados com conversores semicondutores pulsados.

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 https://research.sfu-kras.ru/sites/research.sfu-kras.ru/files/Dissertaciya_Dovudov_SU.pdf

SISTEMA ININTERRUPTO DE ENERGIA DE DUPLA CONVERSÃO COM INTEGRAÇÃO DO RETIFICADOR E DO INVERSOR Fabíola Maria Alexandre Linard-Dissertação submetida à Universidade Federal do Ceará como parte dos requisitos para obtenção do grau de Mestre em Engenharia Elétrica

 SISTEMA ININTERRUPTO DE ENERGIA DE DUPLA CONVERSÃO COM INTEGRAÇÃO DO RETIFICADOR E DO INVERSOR 

Fabíola Maria Alexandre Linard-Dissertação submetida à Universidade Federal do Ceará como parte dos requisitos para obtenção do grau de Mestre em Engenharia Elétrica.

 UNIVERSIDADE FEDERAL DO CEARÁ

 CENTRO DE TECNOLOGIA PÓS-GRADUAÇÃO EM ENGENHARIA ELÉTRICA

Linard, F. M. A. “SISTEMA ININTERRUPTO DE ENERGIA DE DUPLA CONVERSÃO COM INTEGRAÇÃO DO RETIFICADOR E INVERSOR”, Universidade Federal do Ceará – UFC, 2009, 93p. 

Esta dissertação apresenta o estudo, o projeto, a simulação, a execução e os resultados experimentais de uma UPS de dupla conversão de potência igual a 3 kVA, tensão de entrada 220 V e tensão de saída 110 V, com integração entre o retificador e o inversor. O sistema é composto por um retificador e um inversor que utiliza a estratégia unipolar para modulação dos interruptores. As principais características deste projeto são: diminuição dos números dos componentes; diminuição das perdas por condução e comutação nos semicondures durante a operação do sistema e ponto comum entre a alimentação e o estágio de saída, o que facilita o uso desta topologia com bypass. A metodologia de projeto e os resultados experimentais de um protótipo foram apresentados para validar a análise teórica e para confirmar o desempenho do sistema. 

VIEW FULL TEXT:https://www.mediafire.com/file/e8pj8fu2zity2s5/SISTEMA+ININTERRUPTO+DE+ENERGIA+DE+DUPLA.pdf/file