Spirally-rolled electrodes with separator and the batteries therewith

Abstract

Spirally-rolled electrodes for batteries wherein the electrodes having a concentric circle shape or an elliptic shape with positive electrode and negative electrode wound spirally via a separator therebetween has the characteristics as below: (1) the positive electrode and/or negative electrode consist of the combinations of several electrode plates; (2) each of the combinations in the positive electrode and/or the negative electrode so includes that the total amount of the active material or pseudo-active material which are the main materials for the electrode is substantially constant and; (3) each electrode plate in the electrode including plural electrodes is wound in series with an interval therebetween.

1 . A battery comprising:
 a positive electrode;   a negative electrode; and   a separator disposed between the positive electrode and negative electrode;   wherein at least the positive electrode and the negative electrode both comprises a plurality of electrode plates with intervals between plates;   wherein the electrode plates are selected from among groups of plates classified by weight so that the electrode plates have substantially constant weights;   wherein the positive electrode, the negative electrode, and the separator are configured in a spiral roll.   
     
     
         2 . The battery of  claim 1 , wherein each of the electrode plates comprises a lead terminal or terminal equivalent to a lead terminal. 
     
     
         3 . The battery of  claim 1 , wherein each edge of the plates facing the intervals in the plurality of electrode plates is covered by a resin film or wrapped by a strip of separator. 
     
     
         4 . The battery of  claim 2 , wherein each of the electrode plates of the positive electrode comprises a metal foil without active materials along the edge of one side of the electrode plate in the winding direction, wherein the metal foil is exposed over a separator.