Intelligent Ultra Fast Charger for Ni-Cd Batteries

Petchjatuporn, P.; Wicheanchote, P.; Khaehintung, N.; Kiranon, W.; Sunat, Khamron; Chiewchanwattana, Sirapat

doi:10.1109/iscas.2005.1465797

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Рад прихваћен: 6. април 2010. концентрације од 0,1 до 20 mol kg -1 и водоником под притиском од 0,1 до 500 bar [4], проблематика загревања и стварања топлоте никал-кадмијум батерија за време процеса пуњења, препуњавања, паузе и пражњења, где су резултати добијени експерименталним испитивањима [5], а разматрано је и питање електрохемијског опоравка кадмијума код искоришћених никал-кадмијум батерија [6]. Такође је обрађена проблематика пуњења никал-кадмијум батерија, где је детаљно описана предложена метода и поступак, величине које се мере и предности у односу на позната решења, као и анализа добијених резултата [7], затим проблематика брзог пуњења никал-кадмијум и метал-хидрид батерија са могућношћу праћења мерених величина преко рачунара и обрадом података у реалном времену помоћу Matlab/Simuling програма, као и контроле и управљања у циљу спречавања оштећења пуњача и батерије [8,9]. Проблематика пуњења никал-кадмијум батерија с циљем смањења трошкова за пуњаче и повећања сигурности у раду, где су у реалном времену мерене промене напона и капацитета у процесу пуњења обрађена је у раду [10].…”

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Influence of current and temperature on discharge characteristics of electrochemical nickel−cadmium system

Todorović

Grgur²,

Rajović³

2010

Hem Ind

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The paper elaborates determination of characteristic values in the discharging process of non-hermetic nickel-cadmium galvanic battery with nominal voltage Un = 60 V and nominal capacity qn = C5 = 190 Ah and its dependence from current and temperature. Study has been performed with the set of experimental metering of voltages, electromotive force, current from discharge time range and electromotive force in steady state regime before and after battery charging. Electromotive force characteristics are obtained by using the Nernst?s equation, while the least square method was used to determine the average values of internal electrical resistivity, power losses and efficiency level. These results were used in the approximate exponential functions to determine the range dependence of the efficiency level from the internal electrical resistance of discharge current in reliance from the temperature range. Obtained results show that, in accordance to the given voltage variation of 10% Un, this type of battery holds maximal full load current of one hour capacity at the temperature of 25?C and maximal full load current of two hours capacity at the temperature of ?30?C. The methodology used in the case study covers determination of the electromotive force in time range based on the metered results of values during complete battery fullness and emptiness with prior determination of equilibrium constants of galvanic battery reaction through method suggested by the author of this paper. Further process, using the electromotive force values obtained through the aforementioned process, the metered current, and approximate polynomial function of the nominal discharge voltage characteristic determines range of battery internal electric resistance from time, followed by the selection of discharge cases with average values for: voltage, electromotive force, internal electrical resistance, available and utilized power, power losses, and battery efficiency level. An overview of the obtained characteristics for analyzed battery and their comparison with the producers prescribed values and standards led to gaining of the valuable data that show how and in what measure do current and temperature influence the discharge characteristic of non-hermetic nickel-cadmium batteries with an especial observation of internal electrical resistance and battery efficiency level. Obtained results show that electrochemical power sources may provide electric energy with prescribed quality and quantity, with high level of work reliability, as well as with all other positive technical and economic effects within the given current-temperature range.

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Influence of current and temperature on discharge characteristics of electrochemical nickel−cadmium system

Todorović

Grgur²,

Rajović³

2010

Hem Ind

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“…It is noticed that the GA-trained GRNN In our work, the number of alleles is determined from the network yields not only a lower number of processing units but input-output data points as same as that used in [11]. It is a data also a lower MSE than ANFIS [5] controller and GRNN [7] set that the trained GRNN as shown in Fig. 5.…”

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confidence: 99%

“…An ultra fast charging device for Nickel-Cadmium (Ni-Cd) ANFIS. Moreover, the computational afford reduction of batteries is designed through the generalized regression neural GRNN has been improved by further in [7]. Nonetheless, the network (GRNN) and implemented with the data selection of construction GRNN still was not thoroughly MATLAB/SIMULINK for testing and operating on real system.…”

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GA-trained GRNN for Intelligent Ultra Fast Charger for Ni-Cd Batteries

Petchjatuporn

Khaehintung²,

Sunat³

et al.

2005 International Conference on Power Electronics and Drives Systems

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This paper presents an intelligent genetic algorithm successfully applied to Ni-Cd batteries [6]. With less (GA) technique for training of a neural network controller to computational burden, it has been found that its data selection achieve a compact network and to decrease battery charging performance is greater than some techniques, for example time. An ultra fast charging device for Nickel-Cadmium (Ni-Cd) ANFIS. Moreover, the computational afford reduction of batteries is designed through the generalized regression neural GRNN has been improved by further in [7]. Nonetheless, the network (GRNN) and implemented with the data selection of construction GRNN still was not thoroughly MATLAB/SIMULINK for testing and operating on real system. considered. The input-output data for training neural networks were collected from GA. The suitable data were selected to establish Genetic algorithms are probabilistic search techniques that GRNN comprising only 13 processing elements. Each node of emulate the mechanics of evolution [8]. They are capable of RBFs is an extendable support function that overcomes the globally exploring a solution space, pursuing potentially drawback in the existing compact support radial basis functions fruitful paths while also examining additional random points to (CSRBF). Experiments with real time implementation clearly reduce the likelihood of settling for a local optimum. The show that the proposed technique not only requires less neural applied GA-trained RBF network for maximum power point processing units but also yields less MSE than RBF technique.tracking in photovoltaic applications was presented in [9].Keywords-component; genetic algorithm; fast charging; the This paper proposes an efficient approach for battery fastgeneralized regression neural network; radial basisfunctions; charging using GA-trained GRNN controller. Its main advantages over other algorithms are the simple topological I. INTRODUCTION structure, precision in nonlinear dynamics approximation, and fast learning capability. The remainder of the paper is In present the secondary or rechargeable batterles have organized as follows. Following this, a system configuration of been massively used in variety of electrical appliances with th prpoe fs-hrigmtoisadeednScinI.wide range of size and capacity. These batteries can be the proposed fast-charging method is addressed in Section II rechrge afer eingexhustd b pasingcurentthrughThe GA-trained GRNN controller for the fast-charging method recharged after being exhausted by passing current through is reviewed in Section III. In Section IV, the development of them in the opposite direction to that of discharge current [1]. fast-charging is discussed and experimental results with The widely used secondary batteries are Nickel Cadmium (Ni-emphasis on performance of the proposed GRNN controller are Cd), Nickel Metal Hydride (Ni-MH) and Lithium Ion (Li-Ion), given. Finally, conclusion is drawn in Section V.In principal, charging of a battery may be a straightforward task. In prac...

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