• Title, Summary, Keyword: Lead-acid battery

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Improvement of Available Battery Capacity in Electric Vehicles

  • Liu, Yow-Chyi
    • Journal of Power Electronics
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    • v.13 no.3
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    • pp.497-506
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    • 2013
  • This paper proposes a new method to improve the available battery capacity in electric vehicles by connecting lead-acid batteries with lithium-ion battery in parallel to supply power. In addition, this method combines the discharge characteristics of batteries to improve their efficiency and lower their cost for electric vehicles. A lithium-ion battery set is used to connect with N sets of lead-acid batteries in parallel. The lead-acid battery supplies the initial power. When the lead-acid battery is discharged by the load current until its output voltage drops to the cut-off voltage, the power management unit controls the lead-acid battery and changes it to discharge continuously with a small current. This discharge can be achieved by connecting the lead-acid battery to a lithium-ion battery in parallel to supply the load power or to discharge its current to another lead-acid or lithium-ion battery. Experimental results demonstrates that the available capacity can be improved by up to 30% of the rated capacity of the lead-acid batteries.

Kt Factor Analysis of Lead-Acid Battery for Nuclear Power Plant

  • Kim, Daesik;Cha, Hanju
    • Journal of international Conference on Electrical Machines and Systems
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    • v.2 no.4
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    • pp.460-465
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    • 2013
  • Electrical equipments of nuclear power plant are divided into class 1E and non-class 1E. Electrical equipment and systems that are essential to emergency reactor shutdown, containment isolation, reactor core cooling, and containment and reactor heat removal, are classified as class 1E. batteries of nuclear power plant are divided into four channels, which are physically and electrically separate and independent. The battery bank of class 1E DC power system of the nuclear power plant use lead-acid batteries in present. The lead acid battery, which has a high energy density, is the most popular form of energy storage. Kt factor of lead-acid battery is used to determine battery size and it is one of calculatiing coefficient for capacity. this paper analyzes Kt factor of lead-acid battery for the DC power system of nuclear power plant. In addition, correlation between Kt parameter and peukert's exponent of lead-acid battery for nuclear plant are discussed. The analytical results contribute to optimize of determining size Lead-acid battery bank.

Development of Voltage Regulator and Pulse Charger Using Pulse Current for Reuse of the Waste Lead Acid Battery (폐납축전지 재활용을 위한 펄스전류에 의한 전압조정기와 펄스충전기의 개발)

  • Shin, Choon-Shik;An, Young-Joo;Kim, Dong-Wan
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.56 no.2
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    • pp.65-73
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    • 2007
  • In this study, the pulse charger and voltage regulator are proposed that can reuse the waste lead acid battery. The first we develop the voltage regulator that can reuse the waste lead battery. And the pulse current is applied to the terminal of the waste lead acid battery. The voltage regulator is available principle of the pulse current which can reduce the sulfate to incipient material such as Pb and PbO2. Therefore the internal resistance of the lead acid battery is decreased, the performance of the lead acid battery is improved and the durability is prolonged. The second we develop the pulse charger using the voltage regulator. The pulse charger uses the switch mode of the forward convert method. The pulse charger maintain the constant voltage in state removing the lead acid battery and when it connected the pulse charger, it is converted the charge mode of the constant current immediately. It continues the rapid charge until the full state of the lead acid battery. After that the pulse charger is converted to the charge mode of constant voltage automatically, and then it continues the normal charge. The experiment results show that the effectiveness of the voltage regulator and pulse charger such as the good performance and the prolonged durability in lead acid battery of the small and large capacity.

A Study on the Establishment of Impedance/Conductance Guide Line for Diagnosis of Lead-Acid Battery's State of Health(SOH) (납축전지 건전상태 진단을 위한 기준 임피던스/컨덕턴스 설정에 관한 연구)

  • Kim, Chong-Min;Bang, Sun-Bae;Shong, Kil- Mok
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.58 no.2
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    • pp.214-220
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    • 2009
  • Battery is one of the emergency power and its reliability is a very important to keep up the minimum of building capabilities in case of interruption of electric power. This paper, a comparison was made between three different types of instrument on 30 valve regulated lead acid(VRLA) TYPE 12[V]/100[AH] batteries, and then their indicated measured values(impedance/conductance) were compared with the measured capacity of the battery. As a result, Measured value of instrument is strongly related to battery's capacity in the same group battery and Impedance/Conductance guide line for diagnosis of lead-acid battery's state of health(SOH) is a different from each battery guoup.

Algorithm for Improving the Efficiency of Storing Electricity using Experiments of Charging Characteristics for Industrial Lead-Acid Battery (산업용 연축전지의 충전특성실험에 근거한 축전효율 개선 알고리즘)

  • Park, Yun-Ho;Jeon, Sun-Yong;Seo, Bo-Hyeok
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.49 no.8
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    • pp.432-441
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    • 2000
  • It is difficult to analyze the charging characteristics of the lead-acid battery, because of the influences by various non-linear and time-variant parameters. In this study, the charging characteristics of high capacity industrial lead-acid battery 630 Ah was investigated through experiments with respect to the variations of temperature and the aged state of battery during the charging process. The database of those characteristics is established from the results of experiments, and the fuzzy logic charging algorithm is suggested using them. The results of experiment shows that the industrial lead-acid batteries can be always fully charged within the saved charging time by the proposed charging control algorithm adapting to the variations of charging condition. This new charging concept will be useful for developing the advanced battery charger improving the efficiency of storing electricity.

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The Corrosion behaviour of Pb-Ca alloy for Lead-acid battery by cyclic Voltammetry (Cyclic Voltammetry에 의한 연측전지용 Pb-Ca 합금의 부식특성 연구)

  • Kim, S.P.;Kim, G.T.
    • Proceedings of the KIEE Conference
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    • pp.1048-1050
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    • 1995
  • Lead-acid battery is used widely as a power source at a automobile, industrial machines, folk lifts, U.P.S. etc. Lead-acid battery is cheaper than arty other secondary battery, but this battery has many disadvantages such as heavy, low energy density, environment problem etc. In this article, we introduce cyclic voltammetry methods to investigate corrosion behaviour of positive grids of Pb-Ca alleys.

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The mixing effect of additives on lead-acid secondary battery (납축전지에 미치는 첨가제의 복합적인 영향)

  • Park, Kyung-Wha;Ha, Tae-Hyun
    • Proceedings of the KIEE Conference
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    • pp.1402-1403
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    • 2006
  • The sulphation is main deterioration of lead-acid batter, then there were many kinds of attempts to improve these problems and one of them is to add additives to the electrolyte. In this study some mixed additives such as silicate & boric acid and silicate & phosphoric acid were added to 38% $H_{2}SO_{4}$ electrolyte of lead acid battery to improve electrochemical properties of corrosion resistance, etc. of anode and cathode of lead acid battery.

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A Study on the Additive of Positive Paste in Lead Acid Battery (납축전지 양극 Paste 첨가제에 관한 연구)

  • Jeong, Soon-Wook;Ku, Bon-Keun
    • Journal of the Korean Applied Science and Technology
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    • v.27 no.2
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    • pp.196-201
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    • 2010
  • The influence of red lead($Pb_3O_4$) to curing and formation reaction properties when it was added in positive material of lead acid battery for vehicle use has been investigated. At the results, it was confirmed that the addition of red lead led 4BS crystal size to be smaller and increased the rates of 4BS formation and Pb consumption. Consequently the curing time was shortened to half compared with that of red lead-free one. In addition to this, the lead acid battery prepared by adding red lead showed 14% higher efficiency at the life cycle test than that without red lead.

A Study on Estimation Method for Optimal Composition Rate of Hybrid ESS Using Lead-acid and Lithium-ion Batteries (연축전지와 리튬이온전지용 하이브리드 ESS의 최적구성방안에 관한 연구)

  • Park, Soo-Young;Ryu, Sang-Won;Park, Jae-Bum;Kim, Byung-Ki;Kim, Mi-Young;Rho, Dae-Seok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.6
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    • pp.962-968
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    • 2016
  • The large scaled lead-acid battery is widely used for efficient operation of the photovoltaic system in many islands. However, lithium-ion battery is now being introduced to mitigate the fluctuation of wind power and to replace lead-acid battery. Therefore, hybrid ESS(Energy Storage system) that combines lithium-ion battery with lead-acid battery is being required because lithium-ion battery is costly in present stage. Under this circumstance, this paper presents the optimal algorithm to create composition rate of hybrid ESS by considering fixed and variable costs in order to maximize advantage of each battery. With minimization of total cost including fixed and variable costs, the optimal composition rate can be calculated based on the various scenarios such as load variation, life cycle and cost trend. From simulation results, it is confirmed that the proposed algorithms are an effective tool to produce a optimal composition rate.

Prediction of Charge/Discharge Behaviors and Aging of the VRLA Battery (VRLA 배터리의 충/방전 거동과 노화 예측 모델링)

  • Lee, Myoungkyou;Cho, Jaesung;Shin, Chee Burm;Ryu, Ki seon
    • Korean Chemical Engineering Research
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    • v.56 no.6
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    • pp.779-783
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    • 2018
  • In this work, Mathematical modeling was carried-out to predict the charging/discharging characteristics of VRLA (Valve regulated lead acid) battery, which is mainly used as a 12 V lead acid battery for automobile. And It also carried-out how it's characteristics would be changed due to aging. A mathematical modeling technique, which has been mainly used to predict behavior of Lithium-ion batteries, is applied to commercial 70 Ah VRLA battery. The modeling result of Voltage was compared with result of constant current charge / discharge test. From this, it can be seen that the NTGK model can be applied to the lead acid battery with high accuracy. It was also found that the aging of lead-acid battery can be predicted by using it.