Abstract: An electrochemical cell having an improved current connector. The electrochemical cell includes a plurality of positive and negative plates and a separator interposed therebetween; a first current connector for electrically connecting adjacent ones of said positive plates; and a second current connector for electrically connecting adjacent ones of said negative plates. Each of the first and second connectors includes a spring member defined by adjacent turns respectively having spaces therebetween, wherein the positive plates are partially disposed in the spaces of the first connector and the negative plates are partially disposed in the spaces of the second connector. The spring member may be a coiled member of a serpentine member. Alternatively, the current connector is a V-shaped member having the slots formed therein by etching or the like.

Abstract: An electrochemical cell, including a jelly-roll type electrode stack, and a method for making such cell. The electrochemical cell includes folded electrode portions which form a plane recessed from the end of the electrode stack. The folded electrode portions are preferably formed by making pairs of slits in the electrode end and bending over the electrode portions between each pair of slits. The recessed plane forms a large area to which a current collection tab is subsequently connected. A coating may be applied to the folded portions of the electrode to further increase the contact area with the current collection tab by eliminating the slight variations in the recessed plane which are due to the overlap of the folded electrode portions.

Abstract: An electrochemical cell, including a jelly-roll type electrode stack, and a method for making such cell. The electrochemical cell includes folded electrode portions which form a plane recessed from the end of the electrode stack. The folded electrode portions are preferably formed by making pairs of slits in the electrode end and bending over the electrode portions between each pair of slits. The recessed plane forms a large area to which a current collection tab is subsequently connected. A coating may be applied to the folded portions of the electrode to further increase the contact area with the current collection tab by eliminating the slight variations in the recessed plane which are due to the overlap of the folded electrode portions.