Patent ID: 8808914

Claim:
A lead-acid battery, comprising: a cylindrical case forming a common gas management cavity, the cylindrical case being sealed; a first cell stack comprising a first non-flooded cell in an overlapping spirally wound configuration having ionic transfer therein; a second cell stack comprising a second non-flooded cell in an overlapping spirally wound configuration having ionic transfer therein; and a conductive substrate comprising a current collector embedded in both an active material of the first cell stack and an active material of the second cell stack, the conductive substrate electrically connecting the first cell stack and the second cell stack, the conductive substrate further comprising a first portion and a second portion; the first non-flooded cell further comprising a first positive electrode and a first negative electrode, the first positive electrode being disposed on the first portion of the conductive substrate, the second non-flood cell further comprising a second positive electrode and a second negative electrode, the second negative electrode being disposed on the second portion of the conductive substrate, the first cell stack and the second sell stack being formed by simultaneously rolling a first cell strip and a second cell strip corresponding respectively to the first non-flooded cell and the second non-flooded cell; and the first cell stack and the second cell stack being disposed in the common gas management cavity and disposed axially in the cylindrical case.