Spiral electrode storage battery with improved electrode assembly construction and method of making

Abstract

Abstract A LEAD-ACID STORAGE BATTERY OF THE JELLY-ROLL TYPE IS PRODUCED BY ROLLING UPON A MANDREL TWO ELECTRODE STRIPS, EACH ELECTRODE STRIP COMPRISING A PAIR OF MEMBRANES OF CONTROLLED MICROPOROSITY WITH A SHEET OF PURE LEAD PROVIDED WITH A PLURALITY OF SPACED PERFORATIONS INTERPOSED BETWEEN THE MEMBRANES OF EACH PAIR. A SPREADABLE MASS OF COLLOIDAL ACTIVE POSITIVE ELECTRODE MATERIAL MIXED WITH ACID IS INTRODUCED INTO THE PERFORATIONS OF ONE LEAD SHEET AND A SIMILAR MASS OF NEGATIVE ELECTRODE MATERIAL MIXED WITH ACID IS INTRODUCED INTO THE PERFORATIONS OF THE OTHER LEAD SHEET. THE SPREADABLE ELECTRODE MATERIAL IS INTRODUCED CENTRALLY OF THE STRIPS OF LEAD IN AN AMOUNT CONTROLLED TO FILL ONLY ABOUT 80% OF THE APERTURES AND TO LEAVE APERTURES ADJACENT THE EDGES OF THE STRIP EMPTY OR PARTIALLY FILLED TO PROVIDE FOR EXPANSION. AT ONE EDGE OF EACH ELECTRODE STRIP THE LEAD PROJECTS BEYOND THE MEMBRANES AND AT THE OTHER EDGE THEMEMBRANES PROJECT BEYOND THE LEAD WITH STRIPS OF POLYETHYLENE LYING BETWEEN THE PROJECTING PORTIONS OF THE MEMBRANES. THERE IS ALSO WOUND UP WITH THE ELECTRODES STRIPS OF LEAD SO AS TO FILL THE SPACES BETWEEN THE PROJECTING PORTIONS OF LEAD OF ELECTRODES OF LIKE POLARITY. AFTER WINDING I COMPLETE, THE JELLY-ROLL IS FURTHER WRAPPED WITH POLYETHYLENE AND THE PROJECTING PORTIONS OF LEAD AT EACH SIDE OF THE JELLY ROLL ARE GRIPPED BY AN EMBRACING CLAMP.

Inventors

• 👤 M Shoeld

Bibliographic Details