Abstract
Modernization of old types of energy storages leads to appearance of new more reliable, efficient and energy-intensive storage devices. But at the same time, they become more complicated and more expensive. That is why maintenance and increase of life cycle for traditional and technologically simple batteries is still actual problem. The paper considers reasons of quick failure one of the most widely spread types of storage batteries used in railway and motor transport - lead-acid batteries. The paper presents consequences of such dangerous phenomenon as sulphation of electrodes arising due to deep discharge of a battery. The authors have revealed additional factors that lead to sulphation. As a result, the authors suggest a principal protection circuit from a critically low charge of batteries on the basis of simple electric devices - a contactor, a relay, a switch and diodes.
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