Lead
sulphate in discharged state due to reaction with oxygen
returns to charged state again (spongy lead) through continuous
charging.
PbSO4+2H++2e-=Pb+H2SO2
(5)
Thus,
the total reaction on negative electrode plate is:
(3)+(4)+(5)
that is: O2+4H++4e-=2H2O
(6)
This
is right the reversal course of the reaction (2) on positive
electrode plate.
In
general, we can see that the Oxygen produced on the positive
electrode plate due to decomposition water reacts with the
active material on the negative electrode plate and deoxidize
water. During this whole process, there is no loss of water in
storage battery, therefore RESOURCE Battery can be designed to
a sealed structure.