Alkaline batteries

Generalized model of capacitance from discharge current dependence in nickel-cadmium batteries

For nickel-cadmium batteries of stationary application, a global empiric correlation C(i) describing the dependency of released capacitance by the batteries at different discharge currents was suggested, which is true for batteries of any capacitance and any mode of discharge (H, M, L). The global correlation C(i) can be described by generalized Peukert's equation, Korovin-Skundin's equation, probability integral, and porous electrode equation with accuracy sufficient for practical application. This correlation is most easily described by the generalized Peukert's equation C=Cm/(1+(i/IC/2)3.6).

Temperature dependence of polarization and corrosion characteristics of different aluminum alloys in alkaline electrolyte

Aluminum is one of the most energy-intensive materials, which is the base for the air-aluminum electrochemical generators (AA ECG) with a specific energy of 300 W·h/kg. Such generators can be considered as a promising source of energy for electric vehicle due to their advantages such as high energy, the possibility of organizing a closed cycle of aluminum production and use of heat generated by the AA ECG for heating the interior of the electric vehicle. The operation of AA ECG is most effective when aluminum alloys with indium in an alkaline electrolyte (with the addition of tin salts as a corrosion inhibitor) are used. The subjects of temperature influence on the anodic dissolution and aluminum corrosion and maximum power density are still not enough studied. This article is devoted to the study of the temperature effect on the anodic dissolution of aluminum and its alloys at the maximum achievable current density.

Nonlinear structural model of the battery, research of processes of relaxation after charge

It is shown that the nonlinear structural model of the battery can be used for modeling the voltage relaxation processes after a charge of batteries. The solution obtained is valid for alkaline, acid and lithium-ion batteries. Comparison of solutions, with the experimental data for nickel-cadmium batteries, showed, that the relative error does not exceed 3%.

The research of nickel-cadmium accumulators forming process on their physical models

Approach to the choice of charge termination criterion of nickel-cadmium accumulators forming cycles is described. The results of accumulators' physical models forming, using chosen criterion are represented. The research shows the effectiveness of prolonged – before voltage regulation – charges during nickel-cadmium accumulators capacity forming due to the considerable decrease in the number of charge-discharge forming cycles and improvement of their discharge characteristics.

Research of nickel cadmium storage batteries 42NK-125 capacity regeneration.

The comparative results of nickel cadmium storage batteries capacity regeneration with asymmetrical and direct currents after their exploitation on the electric locomotives in the conditions of constant floating with current impulses are represented. The capacity regeneration with asymmetrical current was carried out rapidly, the battery was restored with charging capacity numerically equal to 1.2Cnom. The capacity regeneration with direct current was carried out in accordance with sendee schedule of electric locomotives' batteries when restoring them with charging capacity 3Cnom. The regeneration with asymmetrical current was carried out on the automated charging station CA3P-4,5-380/100- УХЛ-202. Usage of asymmetrical current for the battery capacity regeneration allowed to half the time of charge-discharge cycle in comparison with standard mode of the capacity regeneration, to reduce number of technological training cycles from 3-4 to 1-2, to reduce general time of battery rebuilding for exploitation to 1.5 times, to lower ecological load and power inputs at charging.

Hjnentiostatic diagnostic method of nickel-oxide electrode active materialfrom nickel-cadmium battery

It was described a featers of potentiostatic diagnostic method of nickel-oxide electrode active material. A relation between current of nickel-oxide electrode under potentiostatic polarization was found.

Electrochemical characteristics of the materials on the basis of the alloys AB5 and AB2 types

A comparanive stady was made of specific discharging capacity of metal hydride electrodes (MH) based jn a hydrogen-sorbing AB2 alloy (ZrNi1.2Mn0.5Cr0.2V0.1) and its compositions with an AB5 alloy [the intermetallide LaNi5 with predominating components (Co, Mn, Ca)] in thecourse of the nickel-metal hydride battery formation. The formation of the active mass of the MH electrode (on the fifth charge-discharge cycle) has been found to proceed most effectively at a powder composition ratio of alloys AB2:AB5 = 1:1.

Technology of metal fiber production by melt extraction for a porous electrodes of electrochemical sources

The paper presents an analysis and modelling process for nickel fibers production by the method of hanging drops extraction, with a view to select the optimal technology parameters for the fibers of the required size. Thecharacteristics of the tlectrode bases, made on the basis of these fibers are indicated.