Patent ID: 6805994
Filing Date: 2004-10-19
Classification: H01M,Y02E,Y02P

Abstract:
A solid electrolyte cell comprising:a rolled electrode body having: a positive electrode having a strip positive electrode collector having a first side and a second side opposite the first side, the first and second sides of the strip positive electrode collector are coated with a positive electrode active material layer, and a negative electrode having a strip negative electrode collector having a first side and a second side opposite the first side, the first and second sides of the strip negative electrode collector are coated with a negative electrode active material layer, which positive electrode and negative electrode are layered via a solid electrolyte layer and rolled in a lengthwise direction, wherein said positive and negative electrodes each have a collector first-side exposed portion at their one end in the lengthwise direction positioned at an outermost circumference of the rolled electrode body, where at least the first side of the strip positive electrode collector and at least the first side of the strip negative electrode collector are exposed, and the collector first-side exposed portion of the positive electrode covers the outer circumference of said rolled electrode body by one turn or more; wherein said positive electrode has a collector inner first-side exposed portion at an end of the positive electrode opposite the collector first-side exposed portion in the lengthwise direction of the positive electrode, the collector inner first-side exposed portion of the positive electrode being at an innermost circumference of the rolled electrode body; and wherein the negative electrode has a collector inner first-side exposed portion at an end of the negative electrode opposite the first-side exposed portion in the lengthwise direction of the negative electrode, the collector inner first-side exposed portion of the negative electrode being at an innermost circumference of the rolled electrode body, the collector first-side exposed portions of the positive and negative electrodes covering the inner circumference of the rolled electrode body bv one turn or more; and a multi-layered cell casing film covering the rolled electrode body, the multi-layered cell casing film comprising a polyethylene terephthalate layer.