Lead Acid Battery

Every vehicle has a #battery that used for starting engine and powering electrical devices .

بطارية حمضية

The lead acid battery consists of an insulator container contains tow poles off lead and acid electrolyte

Lead Acid Battery
Lead Acid Battery

When we put lead in #sulphuric_acid electrolyte it reacts and converts lead poles into #Lead sulphate PbSO4 .

Charging : When connecting electrodes to DC the anode converts into PbO2 and the cathode converts into Pb

Discharging : When connecting electrodes to load they converts into PbSO4

lead acid battery charging discharging process
lead acid battery charging discharging process

The scheme below shows the detailed chemical electrode reactions:

Discharge Charge
Positive Electrode
Anode (+)
Negative Electrode
Cathode (-)
Positive Electrode
Anode (+)
Negative Electrode
Cathode (-)
PbO2 + HSO4 + 3H+ + 2e

PbSO4 + 2H2O
Pb + HSO4

PbSO4 + H+ + 2e
PbSO4 + 2H2O

PbO2 + HSO4 + 3H+ + 2e
PbSO4 + H+ + 2e

Pb + HSO4
Overall Cell Reaction Overall Cell Reaction
Pb + PbO2 + 2H+ + 2HSO4

2PbSO4 + 2H2O
2PbSO4 + 2H2O 

Pb + PbO2 + 2H+ + 2HSO4

 

 

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.