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nature : it is the most widely applied, the most common battery. The anode active material is cavernous lead; As cathode active material of lead dioxide; Yes sulfate aqueous electrolyte (relative density of about 1.28). When sulfate discharge continuously consumption, the proportion dropped electrolyte, the positive and negative film has generated the insulation of lead sulfate, the active substances not fully utilized, reducing its efficiency. But they charge timely, positive and negative on the lead sulfate were to resume as lead dioxide and lead, release sulfuric acid, electrolyte density recovery. Lead-acid batteries are the biggest advantages of cheaper prices. Moreover, its single battery voltage of about 2 volts, which is the aqueous battery highest. The battery charging and discharging state can also, through the electro-hydraulic weight measurement. Its drawback is heavier, than the theoretical energy only 167 kilowatt hours / kg, the actual energy density of 20-35 kilowatt hours / kg. In addition, the use of lead-acid batteries need more maintenance. In the late charge, voltage or high voltage to 2.45 volts above, the electrohydraulic the water began to degrade, oxygen cathode, anode hydrogen (At this juncture, may also encounter fire explosion), the consumption of water. In addition, the placement of lead-acid batteries not susceptible to self-discharge, the negative electrode automatically lead role with sulfuric acid, sulfuric acid production, production of lead sulfate and hydrogen : Pb + H2SO4 �PbSOk UB>4 + H2 hydrogen to escape electrohydraulic away to form acid mist and environmental hazard. To enhance gate electrode plate processing performance and mechanical strength, which often increases of about 7% of the antimony and antimony-hydrogen potential lower accelerate this response. The cathode will lead dioxide and lead Grid generated automatically lead sulfate. This generation of lead sulfate crystals will automatically grow up and not charging the full recovery, battery capacity loss, the so-called sulfation (sulfation). Therefore, no lead-acid batteries have to be periodically adding water and supplementary charge, electrohydraulic exudative sulfate when there are very corrosive. Sealed lead-acid batteries in the development of these problems have been improved.
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