Battery separator for extending the cycle life of a battery
A battery separator for extending the cycle life of a battery has a separator and a conductive layer. The conductive layer is disposed upon the separator. The conductive layer is adapted to be in contact with the positive electrode of the battery thereby providing a new route of current to and from the positive electrode.
1. A battery separator in a lead acid secondary battery having a positive electrode therein, the battery separator comprising:
a porous nonconductive membrane;
wherein said porous nonconductive membrane further comprises ribs; and
a conductive layer comprising silver painted onto a tip of said ribs,
said conductive layer in direct contact with the positive electrode of the lead acid secondary battery, wherein the positive electrode is made from a material less corrosion resistant than the conductive layer.
2. The separator according to claim 1 , wherein the conductive layer further comprises lead.
3. The separator according to claim 1 , wherein the conductive layer further comprises lead and tin.
4. The separator according to claim 1 , wherein the conductive layer further comprises lead, calcium and tin.
5. The separator according to claim 2 , wherein the conductive layer comprises a lead alloy comprising silver in an amount from greater than 0 to 0.015%.
6. The separator according to claim 3 , wherein the conductive layer comprises a lead alloy comprising 0.8%-1.17% tin and silver in an amount from greater than 0 to 0.015%.
7. The separator according to claim 4 , wherein the conductive layer comprises a lead alloy comprising 0.02%-0.06% calcium, 0.3%-3% tin, and 0.01%-0.05% silver.
8. The battery separator of claim 1 where said conductive layer is in the form of strips, screen, foil, thread, wire, or coating.
9. The battery separator of claim 1 where said conductive layer is disposed upon said separator by adhesively bonding said conductive layer on said separator.
10. The battery separator of claim 1 where said conductive layer is disposed upon said separator by hot melting said conductive layer on said separator.
11. The battery separator of claim 1 wherein said conductive layer is adhered to said porous nonconductive membrane by coating said conductive layer on said porous nonconductive membrane.
12. The battery separator of claim 1 comprising ribs adapted to face the positive electrode.
13. A lead acid battery comprising the battery separator of claim 1 .
14. A lead acid battery comprising the battery separator of claim 11 .
15. A lead acid battery comprising the battery separator of claim 12 .