active substance of
plus plate (charge state) |
active substance of
minus plate (discharge state) |
active substance of
plus plate (charge state) |
active substance of
minus plate (discharge state) |
|
At the termination of charge or when the battery is overcharged, oxygen is produced on positive plate: |
 |
| Oxygen gets into minus plate through the gas path on isolator and reacts with active substances-spongy lead and active substances into lead sulfate (in discharge state) and restraining the production of hydrogen at the same time. |
 |
 |
| Lead sulfate in discharge state due to reaction with oxygen now returns to charge state (spongy lead) through keeping on charging. |
 |
| The general reaction on minus plate is |
 |
This is just the inverse course of the reaction (2) on plus plate
in
general, the oxygen produced on the plus plate due to decomposition water reacts with the active substances of the minus plate and |
