• Title/Summary/Keyword: electric battery

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Electric Vehicle Market and Battery Related Technology Research Trends (전기자동차 시장 및 배터리 관련 기술 연구 동향)

  • KIM, YANGHWA;LIM, JAEWAN;PARK, GYUYEOL;LIM, OCK TAECK
    • Journal of Hydrogen and New Energy
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    • v.30 no.4
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    • pp.362-368
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    • 2019
  • Electric vehicles contribute greatly to energy conservation, $CO_2$ reduction and energy security through high fuel economy and various electric sources. Electric cars have a huge economic impact. More than 14 million hybrid electric cars have been sold worldwide. More than 3 million plug-in electric vehicles have been sold worldwide. The environmental impact depends greatly on the amount of national power generation, and as the electric grid becomes more and more carbon-intensive, countries are increasingly adopting hybrid and electric vehicles. Electricity is expanding beyond cars. Electric buses, trucks, and ships have similar benefits.

State-of-Charge Balancing Control of a Battery Power Module for a Modularized Battery for Electric Vehicle

  • Choi, Seong-Chon;Jeon, Jin-Yong;Yeo, Tae-Jung;Kim, Young-Jae;Kim, Do-Yun;Won, Chung-Yuen
    • Journal of Electrical Engineering and Technology
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    • v.11 no.3
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    • pp.629-638
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    • 2016
  • This paper proposes a State-of-Charge (SOC) balancing control of Battery Power Modules (BPMs) for a modularized battery for Electric Vehicles (EVs) without additional balancing circuits. The BPMs are substituted with the single converter in EVs located between the battery and the inverter. The BPM is composed of a two-phase interleaved boost converter with battery modules. The discharge current of each battery module can be controlled individually by using the BPM to achieve a balanced state as well as increased utilization of the battery capacity. Also, an SOC balancing method is proposed to reduce the equalization time, which satisfies the regulation of a constant DC-link voltage and a demand of the output power. The proposed system and the SOC balancing method are verified through simulation and experiment.

A Study on SOC Algorithm and Design of Battery ECU for Hybrid Electric Vehicle (하이브리드 전기자동차용 배터리 ECU 설계 및 잔존용량 알고리즘에 관한 연구)

  • 남종하;최진홍;김승종;황호석;김재웅
    • The Transactions of the Korean Institute of Power Electronics
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    • v.9 no.4
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    • pp.319-325
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    • 2004
  • The major factors that make ZEV affordable are the range and cost. The development of advanced batteries such as Ni-MH battery can solve the problem partly; on the hand the battery management system is an efficient way. Ni-MH battery and battery ECU is a key component influencing ZEV performance, such as range, acceleration and hill-climbing capability. Because most problems related to battery such as short circuit, over-discharge and overcharge occur easily during operation, it is necessary to develop a dedicated battery ECU for HEV. This paper proposes a new SOC algorithm for the HEV based on the terminal voltage and current integration. And battery ECU was designed and analyzed. Also, the validity is confirmed through experiment.

AuxiliaryPower Device of Spontaneous starting for Railway Vehicle when electric overdischarge or an impossibility of being supplied with control power (밧데리 방전 및 제어 전원 수전불가시 자생기동 가능한 전동차용 보조전원장치)

  • Jeong Soon-You;Kim Sang-Kyun;Lee Hyun-Seok;Lee Kyung-Bok
    • Proceedings of the KSR Conference
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    • 2003.05a
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    • pp.548-553
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    • 2003
  • Battery supplies Each Electric device in Railway vehicles with Control Power. When Battery is overchargedjustly, the battery voltage is not satisfied with the minimum operating voltage, CVCF Inverter(SIV) is supplied with external Power supply or the other railway vehicles and start up CVCF Inverter. In this paper to improve this problem, Dead battery Starter system is proposed. When the battery voltage is not satisfied with the minimum value.turn on the Dead Battery Starter switch, and the Dead Battery Starter supplies the control power to the SIV controller from the line voltage. With this Dead Battery Starter system, the train can be operated when the battery is not proper status. Dead Battery Starter is designed by ROTEM and will be delivered to Attiko Metro Series 2.

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A Study on Solar Charging System for Stable Battery Use of Electric Kickboard (전동킥보드의 안정적 배터리 사용을 위한 태양광 충전 시스템에 관한 연구)

  • Jang, Eun-Jin;Shin, Seung-Jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.21 no.1
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    • pp.175-179
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    • 2021
  • With the recent increase in the proportion of single-person households, the demand for reasonable personal mobility has increased, and the "Personal Mobility" industry that can be used conveniently and concisely has grown rapidly. In fact, according to data from the Korea Transport Institute, the scale of the electric kickboards rental industry, one of the personal mobility industry sectors, is expected to expand to 200,000 units in 2022. Due to the characteristics of electric kickboards that are powered by electricity, stable and efficient battery supply is the most basic and important issue. According to recent reviews from users who have used the electric kickboard, there were cases where the use of the electric kickboard is attempted, but the battery is in a discharged state or the battery charge level is low and thus cannot be used. Therefore, this paper proposes a solar charging system for stable battery use of electric kickboards. When this system is applied, it is expected that it will not only be an eco-friendly charging method for electric kickboards, but also stably supply and demand batteries while driving.

A study on a Development of Electric Equivalent Circuit Models of Vehicle Electric Power System (자동차 전력 시스템의 전기적 등가회로 모델 개발에 관한 연구)

  • Choi, Dae-Ho;Lee, Jae-In;SunWoo, Myoung-Ho
    • Proceedings of the KIEE Conference
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    • 2000.11d
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    • pp.669-671
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    • 2000
  • Vehicle electric power system, which consists of two major components; an alternator and a battery, supplies electric power to vehicle electric and electronic systems. In recent years, bigger power supply is required for the rapid demand of the number of vehicle electric and electronic systems. It is important that vehicle power system should be analyzed exactly. For the simulation of vehicle electric power system, appropriate component model of vehicle electric power system should be chosen. In this paper, a simplified and accurate battery model is developed to obtain the battery parameters, and a Variable Alternator Terminal Voltage Model is introduced to described an alternator. The case study shows that simulation results using the suggested models are well agreed with the experiments.

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One-Dimension Thermal Modeling of NiMH Battery for Thermal Management of Electric Vehicles (전기 자동차용 니켈수소 배터리 1차원 열전달 모델링)

  • Han, Jaeyoung;Park, Jisoo;Yu, Sangseok;Kim, Sung-Soo
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.38 no.3
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    • pp.227-234
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    • 2014
  • Fuel consumption rates of electric vehicles strongly depend on their battery performance. Because the battery performance is sensitive to the operating temperature, temperature management of the battery ensures its performance and durability. In particular, the temperature distribution among modules in the battery pack affects the cooling characteristics. This study focuses on the thermal modeling of a battery pack to observe the temperature distribution among the modules. The battery model is a prismatic model of 10 NiMH battery modules. The thermal model of the battery consists of heat generation, convective heat transfer through the channel and conduction heat transfer among modules. The heat generation is calculated by the electric resistance heat during the charge/discharge state. The model is used to determine a strategy for proper thermal management in Electric vehicles.

Design interchangeable battery modules with spare cells for electrical propelled ship (전기추진선박에서 예비-셀을 이용한 자가 진단 기반의 배터리 관리 시스템 설계 및 구현)

  • Lee, Jong-Hak;Oh, Ji-Hyun;Oh, Jin-Seok
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.25 no.5
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    • pp.709-718
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    • 2021
  • As regulations on environmental pollution of ships have been strengthened, interest in smart ships such as electric propulsion ships equipped with hybrid power systems is increasing. Since batteries used in electric propulsion ships have a larger capacity than batteries used in vehicles, the price is high and maintenance is considered important. The ship's battery is manufactured as an integral type and is managed by the battery management system, and the maintenance and repair of the battery is performed through the replacement of the battery. we design and implement a battery module and a control algorithm using pre-cell for easy battery management. In addition, a controller is designed to transmit the data necessary for the electric propulsion ship power system control to the power control system. When a battery to which the corresponding spare-cell is applied is used, the stability of the ship and the battery system is increased, and it can have an advantage in terms of maintenance and repair.

Thermal Analysis of a Battery Cooling System with Aluminum Cooling Plates for Hybrid Electric Vehicles and Electric Vehicles (알루미늄 냉각 판을 이용한 하이브리드/전기차용 배터리 냉각시스템의 수치적 연구)

  • Baek, Seungki;Park, Sungjin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.3
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    • pp.60-67
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    • 2014
  • The battery cells in lithium-ion battery pack assembled with high-capacity and high-power pouch cells, are commonly cooled with thin aluminum cooling plates in contact with the cells. For HEV/EV lithium-ion battery systems assembled with high-capacity, high-power pouch cells, the cells are commonly cooled with thin aluminum cooling plates in contact with the cells. Thin aluminum cooling plates are cooled by cold plate with coolant flow paths. In this study, the effect of the battery cooling system design including aluminum cooling plate thickness and various position of cold plate on the cooling performance are investigated by using finite element methods (FEM). Optimal cooling plate and cold plate design are proposed for improving the uniformity in temperature distributions as well as lowering average temperature for the cells with large capacities based on the simulation results.

State of Charge Indicator for Electric Vehicle using Neural Networks (신경회로망을 이용한 전기자동차용 바테리 잔존용량계)

  • Byun, Sung-Chun;Kim, Eui-Sun;Ryoo, Young-Jae;Lim, Young-Cheol
    • Proceedings of the KIEE Conference
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    • 1998.07b
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    • pp.560-562
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    • 1998
  • A new approach to developing battery SOC indicator for electric vehicle is discussed in this paper. One of the most difficult problems associated with the development of electric vehicle is the battery indicator which reliably informs the state of charge(SOC) of the battery to the driver. And the condition to be satisfied with SOC indicator installed on the electric vehicle is that it should be used under frequently variable load. A new method to determining SOC using neural networks(NN) is proposed to satify the condition. The training data of NN are obtained by using mathematical model of lead-acid battery, and calculating discharge currents and terminal voltages while battery discharges with constant current. The 3-layered NN with back propagation algorithm is used Simulation results show that the proposed method is appropriate as SOC indicator of the battery.

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