• Title/Summary/Keyword: Ni-MH battery

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Railway system standby power Nickel metal hydride battery (철도시스템비상전원용 니켈수소(NiMH)전지)

  • Park, Dong-Pil
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.636-645
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    • 2006
  • In order to use railway system standby power, produced 160Ah NiMH battery that would be able to substitute the lead acid battery or NiCd battery form which contain the toxic material in environment, using parallel connected 80Ah NiMH battery. And in order to develop proper electrode in the 160Ah NiMH battery, tested high rate discharge performance of the ternary electrolyte. 160Ah NiMH battery evaluated the various test in order to use railway system standby power.

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Railway System Standby Power Nickel Metal Hydride Battery (철도시스템비상전원용 니켈수소(NiMH)전지)

  • Kim, Sung-Yong;Park, Dong-Pil
    • Journal of the Korean Society for Railway
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    • v.12 no.6
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    • pp.873-877
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    • 2009
  • In order to use railway system standby power, produced 160Ah NiMH battery that would be able to substitute the lead acid battery or NiCd battery form which contain the toxic material in environment, using parallel connected 80Ah NiMH battery. And in order to develop proper electrode in the 160Ah NiMH battery, tested high rate discharge performance of the ternary electrolyte. 160Ah NiMH battery evaluated the various test in order to use railway system standby power.

The Study of the 160Ah Ni-MH battery for Diesel Engine Starting (디젤 엔진 시동을 위한 160Ah급 니켈 수소(Ni-MH) 축전지)

  • Park, Dong Pil;Kim, Lae Hyun
    • Journal of Energy Engineering
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    • v.23 no.4
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    • pp.1-8
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    • 2014
  • For this study, a 160Ah Ni-MH battery is produced with parallel arranged two 80Ah Ni-MH batteries as an unit, in order to start diesel generator(engine) in place of Lead Acid battery or Ni-cd battery which contain indicated toxic pollutant of Environmental pollution, by high capacity Ni-MH battery. And the ternary electrolyte recipe is requested to develop proper electrodes of the 160Ah Ni-MH battery, and then the 160Ah battery can be tested at high rate discharging performance. Zn is added to negative electrode for the improvement of performance. 160Ah Ni-MH battery has been tested in various experiments for diesel engine starting. As the result, diesel engine starting is found successfully.

Influences of Various Electrolytes on the Low-Temperature Characteristics of Ni-MH Secondary Battery (Ni-MH 2차 전지의 저온특성에 미치는 전해액의 영향)

  • Park, Chae-Gyu;Shim, Jong-Su;Jang, Min-Ho;Park, Choong-Nyeon;Choi, Jeon
    • Transactions of the Korean hydrogen and new energy society
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    • v.18 no.3
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    • pp.284-291
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    • 2007
  • The Ni-MH batteries for HEV and industry are normally placed in outdoor, consequently causing an too weak discharge power problem due to a cold weather specially in winter time. In order to improve the low temperature performances of the Ni-MH battery for HEV and industrial uses, it has been investigated the low temperature discharge characteristics of Ni-MH battery with various electrolytes at $-18^{\circ}C$. The summary of experimental results are as follows. The low temperature characteristics depended strongly on the characteristics of electrolytes. When the concentration of the electrolytes were too high or too low the low temperature performance was poor. The best electrolyte was composed of KOH 6.2M+LiOH 1.2M. An addition of RbOH or CsOH to electrolyte improved the low temperature performance. The best total concentration of electrolyte composed of KOH, NaOH and LiOH was about 7M.

A CHARGER/DISCHARGER FOR MODELING OF SERIAL/PARALLEL CONNECTED NI-MH BATTERY

  • Heo, Min-Ho;Ahn, Jae-Young;Kim, Kwang-Heon
    • Proceedings of the KIPE Conference
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    • 1998.10a
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    • pp.554-559
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    • 1998
  • Equalizing the state of charge of cell that affects the charge/discharge quality and efficiency of the battery through the charge/discharge characteristic experiments of battery source, we develope the high efficiency charge/discharge system which would be used in serial HEV with the constant engine-generator output. For this, establishes the electrical model of Ni-MH battery appropriate to the high efficiency charge/discharge conditions. There is no model of Ni-MH cell, so we used Ni-Cd model and obtain the Ni-MH model through the experiment. A reason that each cell has the same charge/discharge property for applying the cell model to serial/parallel connected battery source extensively is needed. Therefore, in this paper, propose the Ni-MH charger/discharger has the equalization charging function and selectable cut-off function.

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A study on the characteristics of inner cell pressure for sealed type Ni-MH rechargeable battery using Zr-based hydrogen storage alloy as anode (Zr-based 수소저장합금을 음극으로 사용한 밀패형 Ni-MH 2차전지의 내압특성에 관한 연구)

  • Kim, Dong-Myung;Lee, Ho;Jang, Kuk-Jin;Lee, Jai-Young
    • Transactions of the Korean hydrogen and new energy society
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    • v.8 no.2
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    • pp.79-90
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    • 1997
  • Extensive work has been done on investigating the inner cell pressure characteristics of sealed type Ni-MH battery in which Zr-Ti-Mn-V-Ni alloy is used as anode. The inner cell pressure of this type Ni-MH battery much more increases with the charge/discharge cycling than that of the other type Ni-MH battery where commercialized $AB_5$ type alloy is used as anode. The increase of inner cell pressure in the sealed type Ni/MH battery using Zr-Ti-Mn-V-Ni alloy system is mainly due to the accumulation of oxygen gas during charge/discharge cycling. The accumulation of oxygen gas arises mainly due to the low rate of oxygen recombination on the MH electrode surface during charge/discharge cycling. The difference of oxygen recombination rate between $AB_5$ type electrode and Zr-Ti-Mn-V-Ni electrode is caused by the difference of electrode reaction surface area resulting from different particle size after their activation and the difference of surface catalytic activity for oxygen recombination reaction, respectively. After EIS analysis, it is identified that the surface catalytic activity affects much more dominantly on the oxygen recombination reaction than the reaction surface area does. In order to suppress the inner cell pressure of Ni-MH battery where Zr-Ti-Mn-V-Ni is used as anode, it is suggested that the surface catalytic activity for oxygen recombination should be improved.

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Experiment and Implementation of NiMH Battery Model for Autonomie Environment (Autonomie에 적용 가능한 NiMH 배터리 모델 실험 및 구현)

  • Lee, Jong-Kyung;Kim, Jae-Eon;Cha, Han-Ju
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.10
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    • pp.1875-1880
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    • 2011
  • This paper proposes a battery model applicable to Autonomie environment. Also, a various of experiment is implemented for validation. The proposed battery model modifies Randles equivalent circuit and battery parameters are extracted from pulsed current tests. The parameters are two-dimensional function of current and SOC(State of Charge). The battery model is developed in the Matlab/Simulink and is implemented for NiMH Panasonic HHR650D and compared with pulsed current discharge curves. The simulation results validate the accuracy of the proposed model and the model is also tested by adding it on Autonomie for HEV application. Constant current charge/discharge, pulsed current test that can be used to extract battery parameter are performed and test results are used to build up the proposed battery model for Autonomie.

SOC Estimation Based on OCV for NiMH Batteries Using an Improved Takacs Model

  • Windarko, Novie Ayub;Choi, Jae-Ho
    • Journal of Power Electronics
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    • v.10 no.2
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    • pp.181-186
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    • 2010
  • This paper presents a new method for the estimation of State of Charge (SOC) for NiMH batteries. Among the conventional methods to estimate SOC, Coulomb Counting is widely used, but this method is not precise due to error integration. Another method that has been proposed to estimate SOC is by using a measurement of the Open Circuit Voltage (OCV). This method is found to be a precise one for SOC estimation. In NiMH batteries, the hysteresis characteristic of OCV is very strong compared to other type of batteries. Another characteristic of NiMH battery to be considered is that the OCV of a NiMH battery under discharging mode is lower than it is under charging mode. In this paper, the OCV is modeled by a simple method based on a hyperbolic function which well known as Takacs’s model. The OCV model is then used for SOC estimation. Although the model is simple, the error is within 10%.

A Feasibility Study of Low-Cost Hybrid Fuel-Cell System for Ship Auxiliary Power (선박 보조전원을 위한 저가형 하이브리드 연료전지 시스템 적용 타당성 연구)

  • Yang, Geun Ryoung;An, Sang Yong;Choo, Jin Hoon
    • New & Renewable Energy
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    • v.9 no.4
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    • pp.3-12
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    • 2013
  • This paper proposes the hybrid fuel cell system that can solve disadvantages of existing fuel cell system and ensure high reliability and high stability. The system consists of PEM fuel cell, Ni-MH battery and power management system. In this system, when the power provided from the fuel cell is higher than the load power, the extra energy may be used to charge the Ni-MH battery. When the fuel cell can not provide enough energy to the load, the shortage of energy will be supplied by the Ni-MH battery. Experimental results show that the output voltage is regulated well during load variations. Also, high system efficiency is achieved.

Modeling of The Ni-MH Battery Source and Development of The Charger.Discharger System (Ni-MH 전지전원의 모델링과 충.방전 장치 개발)

  • 김광헌;허민호;박영수;안재영;양승학;이일기
    • Proceedings of the KIPE Conference
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    • 1998.07a
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    • pp.433-437
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    • 1998
  • Equalize SOC of the cell which effect on the charge.discharge ability and the efficiency of the battery, through the charge.discharge characteristic test of the battery source, and develope the high efficiency charge.discharge system in the series HEV have a constant engine-generator output. For this, in this paper, establish the electrical model and the condition of high efficiency charge.discharge, and proposed the improvement method of charge.discharge characteristic in the battery source that consist of twenty Ni-MH cells connected serial/parallel

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