свинцово-кислотный аккумулятор

The electrochemical characteristics of the negative electrodes of the lead-acid battery with additives of carbon nanotubes and graphene were studied. It was shown that the highest values of the capacitive characteristics of the electrodes were obtained by adding carbon nanotubes to the negative active mass. The processes occurring on the negative electrode were studied by the method of impedance spectroscopy. Applying simulation, an equivalent electrical circuit was obtained, which adequately approximated the obtained frequency dependences.

In this paper a new design of a container is detailed for sealed lead-acid battery operating overboard of a submersible vehicle in conditions of increased ambient pressure. Such a container is both a battery jar and a pressure compensator. It has been shown that a mandatory requirement for such container use is an application of a gelled-electrolyte. Authors have offered a two-stage technology of filling of accumulators without using vacuum pumping.

The properties of a contact corrosion layer (ККС), which appears on border of (preliminary oxidized) lead alloys with products of their anode oxidation and corrosion, were investigated by methods of impedance spectroscopy and on speed oxidation of ions Fe (II). It was found that the contact corrosion layers that appear on lead-antimony alloys have higher electronic conductivity. Alloying by tin and cadmium cause increase of conductivity contact corrosion layer (CCL) that appears on low-antimony lead alloys.

Influence of the carbon additive in negative active material (NAM) on a resource of the lead-acid batteries working in a partial state of charge mode is studied. Extreme character of dependence of speed of degradation NAM from the maintenance in it of carbon is confirmed. Perceptivity of introduction of the carbon additive in negative electrodes of the lead-acid batteries working at partial state of charge mode is demonstrated.

Strategy of the accelerated mode of the charge, including constant current charge to 80 % state-of-charge and a pulse charge by asymmetric current to a full charge is offered. Results of the first investigation phase devoted to studying of influence of a mode constant current charge on a resource of lead-acid accumulators are presented in this work. Various influence of size of an initial charge current on degradation of positive and negative active materials and possibility of charge of the accumulator to 80 % state-of-charge for 0.5 h is demonstrated.

Electrochemical properties of Pb-Sn-Ca-Al-Ва alloys with the various content of barium are studied. It is established that the additive of barium reduces electrochemical activity of alloys at their cycling, and also reduces hydrogen and oxygen overvoltage.

Strategy of the accelerated mode of the charge of the lead-acid batteries, including constant current charge to 80% state-of-charge and a pulse charge to 100% is considered. Various modes one – and two-stage constant current charges are studied in this work, and the estimation of influence of these modes on effectiveness ratio of a charge and a heat-up of batteries is yielded. The data, which allows reasonably choose the mode of the first stage of the accelerated charge to 80% state-of-charge, are presented.

Strategy of the accelerated mode of the charge of the lead-acid batteries, including constant current charge to 80% state-of-charge and a pulse charge to 100% is considered. Influence of key parameters of a pulse charge (amplitude and duration of charge pulse, duration of a pause, the general duration of a pulse charge) on the efficiency of a charge and a heat-up of batteries are studied in this work.

Method and the resultsof measurementof the internalresistance ofbattery duringitschargeanddischarge are described.It was establishedthat the internal resistance ofthe batteryin operatingvoltage range is almost equallywhencharging and dischargingand does not dependon the current.

The influence of porous structure of the absorptive glass mats manufactured by «Hollingsworth&Vose» (thickness 2.8 mm) and BernardDumas» (thickness 3.0 mm), modified by impregnation with polymeric emulsions on the basis of polyvinylidene fluoride (KYNAR), polyvinylpyrrolidone copolymer with styrene (PVS) and polytetrafluoroethylene (Tf), on the efficiency of ionization of hydrogen in lead-acid battery mock-ups. The use of polymer modified emulsions separators from absorbtive glass mat allows to increase the ionization rate of hydrogen on lead-dioxide electrode.