Electrical contact outlet for anodes
First Claim
1. In a polymer electrolyte lithium generator comprising at least one multilayer electrochemical cell, each layer of said cell comprising a laminated combination of at least part of a lithium base strip, said strip having opposite ends and opposite edges, said strip having a thickness between about 1 and 50 microns constituting the anode of said cell layer, a collector for said anode, a cathode and a collector for said cathode, a polymer electrolyte disposed between said anode and said cathode, said collectors, said cathode and said polymer electrolyte being also in strip forms, and an electrical contact outlet for the anodes of said at least one multilayer electrochemical cell, the improvement wherein in each said layer at least one edge of said anode extends beyond corresponding edges of said cathode and said collectors to constitute a plurality of anode projections for said multilayer electrochemical cell, said anode projections being equal in number to the number of layers, said electrical contact outlet device for said anodes comprises a metallic layer consisting of at least one rigid metal which is compatible with lithium, said metallic layer being in intimate electrical contact with substantially the entire extending edges of said anodes at one end of the cell, through said anode projections.
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Accused Products
Abstract
Electrical contact outlet for an anode sheet of a lithium generator with polymer electrolyte, consisting of one or more multilayer electrochemical cells. The cell comprises at least one lithium base sheet having a thickness between about 1 and 50 microns to constitute the anode and its collector and additionally includes a cathode and its collector as well as the polymer electrolyte. A lateral end of the anode sheet extends beyond corresponding ends of the cathode and the collector to constitute a projecting zone. A metallic layer consisting of at least one rigid metal which is compatible with lithium is in electrical contact with the lateral end of the anode sheet but without electronic contact with the other components of the cell. The metallic layer constitutes the external terminal of the generator when the latter is in non-finished condition. According to a variant, a conductive and cohesive intermediate metallic zone, which consists of lithium or lithium rich ductile alloys is in intimate contact with the lateral end of the anode sheet and the metallic layer mentioned above is therefore in electrical contact with the lateral end of the anode sheet by means of the intermediate zone of lithium. Generators provided with such contact outlet as well as a process for the preparation of these contact outlets are described.
140 Citations
61 Claims
- 1. In a polymer electrolyte lithium generator comprising at least one multilayer electrochemical cell, each layer of said cell comprising a laminated combination of at least part of a lithium base strip, said strip having opposite ends and opposite edges, said strip having a thickness between about 1 and 50 microns constituting the anode of said cell layer, a collector for said anode, a cathode and a collector for said cathode, a polymer electrolyte disposed between said anode and said cathode, said collectors, said cathode and said polymer electrolyte being also in strip forms, and an electrical contact outlet for the anodes of said at least one multilayer electrochemical cell, the improvement wherein in each said layer at least one edge of said anode extends beyond corresponding edges of said cathode and said collectors to constitute a plurality of anode projections for said multilayer electrochemical cell, said anode projections being equal in number to the number of layers, said electrical contact outlet device for said anodes comprises a metallic layer consisting of at least one rigid metal which is compatible with lithium, said metallic layer being in intimate electrical contact with substantially the entire extending edges of said anodes at one end of the cell, through said anode projections.
- 32. Process for providing a polymer electrolyte lithium generator with an electrical contact outlet device, said generator comprising at least one multilayer electrochemical cell, each layer of said cell comprising a laminated combination of at least part of a lithium base strip, said strip having opposite ends and opposite edges, said strip having a thickness between about 1 and 50 microns forming an anode of said cell layer, a collector for said anode, a cathode and a collector for said cathode, a polymer electrolyte disposed between said anode and said cathode, said collectors, said cathode and said polymer electrolyte being also in strip forms, and an electrical contact outlet device for the anode of said at least one multilayer electrochemical cell, which comprises assembling said polymer electrolyte lithium generator so that in each said layer at least one edge of said anode extends beyond the corresponding edges of said cathode and said collectors to constitute a plurality of anode projections for said multilayer electrochemical cell, said anode projections being equal in number to the number of layers, depositing a metallic layer consisting of at least one metal which is rigid and compatible with lithium at the level of said anode projections so that said metallic layer be in intimate electrical contact with substantially the entire extending edges of said anodes at one end of the cell through said anode projections.
- 51. Process according to claim 51, wherein said intermediate metallic zone is prepared at a thickness between 0.1 and 2 mm and it is applied on the edge of said anode strip or strips.
Specification