ELECTROCHEMICAL CURRENT COLLECTOR SCREEN DESIGNS UTILIZING ULTRASONIC WELDING

摘要

An electrochemical cell comprising an electrode assembly having a plurality of cathodes in which the plurality of cathodes is electrically connected together at a connection tab junction is disclosed. The junction preferably comprises a plurality of cathode connection tabs that are folded over each other to construct a junction that is mechanically and electrically robust. The junction is comprised of a plurality of connection tabs that each extend from a cathode. Each of the respective tabs is folded over each other to form a compact electrode junction having redundant connections. An elongated lead extends from the junction to provide an electrical connection to the plurality of cathodes. The junction is welded together such as by a laser, resistance or ultrasonic weld joint. The cathode junction is suitable for either primary or secondary cells, particularly those powering implantable biomedical devices.

主权项

1. An electrochemical cell, the cell comprising:
a) a casing; b) an electrode assembly contained within the casing, the electrode assembly comprising:
i) a plurality of cathodes, each cathode composed of an active cathode material, wherein each cathode comprises a cathode connection tab that extends outwardly therefrom;ii) an anode composed of an active anode material having a plurality of folds at spaced intervals along a length thereof, a first anode connection tab extending outwardly from within the anode, wherein at least one of the plurality of cathodes is received within one of the folds of the anode, a separator membrane residing between the anode and the cathode;iii) a current collector, composed of a current collector metal, incorporated with a portion of at least one of the active anode or cathode materials;iv) wherein the plurality of cathode connection tabs are folded over each other thereby creating a cathode connection tab junction, a terminal lead electrically connected to the cathode tab junction; and c) an electrolyte contained within the casing to activate the electrode assembly.