Electrochemical cells with lithium anode

Abstract

Abstract ELECTROCHEMICAL CELLS UTILIZING LITHIUM ANODES PREPARED BY COLD EXTRUSION INTO SHEET FORM. THE EXTRUDED SHEETS ARE SEVERED INTO PRESCRIBED BAND LENGTHS AND THE BANDS ARE PLEATED IN ZIG-ZAG FORM TO PROVIDE MULTIPLE FOLDS OR PLEATS. THIN CATHODE PLATES ARE POSITIONED BETWEEN PLEATS, BEING INSULATED FROM THE PLEATED LITHIUM ANODE BY SUITABLE SEPARATING MEANS. THE DIMENSION OF THE CATHODE PLATES PARALLEL TO THE WIDTH OF THE BANDS IS SUCH AS TO LEAVE A ZONE ALONG AT LEAST ONE EDGE OF THE PLEATED ANODE BAND THAT HAS NO OPPOSITE CATHODE PLATE COUNTERPART. ELECTRICAL CONNECTIONS ARE SECURED TO THE PLEATED BAND IN SAID ZONE AND ARE IN THE FORM OF TABS, FOR EXAMPLE, OF STAINLESS STEEL, SPOT WELDED TO AN EXPANDED METAL STRIP WHICH LATTER IN TURN IS FASTENED TO SAID LITHIUM ANODE BAND IN SAID ZONE AS BY ULTRASONIC WELDING. THE SEPARATING MEANS MAY BE IN THE FORM OF AN ENCLOSING SHEATH OR ENVELOPE OF INSULATING MATERIAL INTO THE LITHIUM BAND IS INSERTED PRIOR TO PLEATING OR THE CATHODE PLATES MAY BE INDIVIDUALLY SHEATHED IN SEPARATOR MATERIAL.

Inventors

• 👤 Alain Blondel
• 👤 Jean-Firmin Jammet

Bibliographic Details