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Analysis on the charging principle of lead-acid batteries

by:Vglory      2021-05-14
Lead-acid battery charging principle The anode (lead dioxide) and cathode (Pb) electrolyte (dilute sulfuric acid) in the battery, 2v power will occur between the two poles. This is based on the principle of lead-acid batteries. Through charging and discharging, the anode and electrolyte change as follows : (Anode) (electrolyte) (cathode) lead dioxide+2h2so4+Pb->PbSO4+2 water+PbSO4 response (discharge) (lead dioxide) (sulfuric acid) (sponge lead) lead dioxide lead price drops, resurrection, Negative activity; the valence of lead in the spongy lead is increased, and the positive charge is active. (Anode) (Electrolyte) (Cathode) PbSO4+2H2O+PbSO4>PbO2+2H2SO4+Pb (charge reaction) (must be in a charged state) (lead sulfate) (water) (lead sulfate) The first lead sulfate is in the lead price When it rises and is oxidized, the positive charge becomes the positive electrode; the valence of lead in the second lead sulfate decreases and recovers, and the negative charge flows into the negative electrode. 1. When the chemical changes are discharged, when the battery is connected to the external circuit of the discharge, the dilute sulfuric acid will react with the active materials on the negative and positive plates to form a new compound lead sulfate. Discharge sulfuric acid components are released from the electrolyte, and the longer the discharge time, the lower the sulfuric acid concentration. As long as the concentration of sulfuric acid in the electrolyte is measured, the specific gravity is measured. 2. The charge chemistry changes, because when the anode is discharged, the lead sulfate cathode plate will restore the charge into sulfuric acid, lead and lead dioxide, and the electrolyte concentration inside the battery gradually increases, that is, the proportion of electrolyte increases , And gradually restore the concentration before discharging. This change shows that the active material of the battery has been converted into power supply conditions. When the two poles of lead sulfate are converted into the initial active material, which is equal to the end of charging, the hydrogen cathode plate occurs, the anode plate, Oxygen, charged to the final stage, is currently used for almost all water electrolysis, the electrolyte will be cut, and it should be made of pure water. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Are you worried about the durability of your electric car lithium battery? Come take a look!
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