Patent ID: 7687191

Claim:
A set of electrode plates for a rolled electrochemical component, comprising: a first electrode plate, a second electrode plate and a separator, said separator being positioned between the first electrode plate and the second electrode plate, and said first electrode plate, said second electrode plate and said separator being revolved into a roll in the length direction, wherein said first electrode plate comprises a first collector and active material coated on the surface of said first collector and said second electrode plate comprises a second collector and active material coated on the surface of said second collector, a first exposed portion with a predetermined width on which the active material is not coated being formed on at least one of two terminals in a width direction of the first electrode plate to form a first collecting section, a second exposed portion with a predetermined width on which the active material is not coated being formed on at least one of two terminals in a width direction of the second electrode plate to form a second collecting section, and at least a portion of one of said first collecting section and said second collecting section in at least an innermost periphery or directly adjacent to the innermost periphery of the one of said first collecting section and second collecting section comprises a cut-off portion having a predetermined width, wherein at least four splits starting from a side edge of the collecting section in its width direction are formed on the collecting section which is positioned at least in the inner periphery, wherein the inner periphery is positioned between the innermost periphery and an outer periphery, and the outer periphery is positioned between the inner periphery and the outermost periphery, and wherein a plurality of splits starting from a side edge of the collecting section in its width direction are formed on the collecting section which is positioned in the remaining periphery of said set of electrode plates, and a space between two splits abutting each other on the collecting section is continuously increased from the inner periphery to the outer periphery of said set of electrode plates.