Lithium ion polymer secondary battery and gelatinous polymer electrolyte for sheet battery

A secondary lithium ion polymer battery comprising a laminate, comprising:

• a strip of negative-electrode sheet comprising a strip of negative-electrode collector foil and a second active material continuously provided on an extended surface of the negative-electrode collector foil;
• a plurality of positive-electrode segments, each comprising a positive-electrode collector foil and a first active material provided on the positive-electrode collector foil;
• and
• at least one polymer electrolyte layer;
• wherein said at least one polymer electrolyte layer is provided on at least one surface of the second active material, the strip of negative-electrode sheet is fan-folded at least one time thereby forming a plurality of flat portions in the structure of the negative-electrode sheet, each one of the plurality of positive-electrode segments has a surface area which corresponds to the surface area of one flat portion of the folded negative-electrode sheet with the result that the plurality of positive- electrode segments is interposed between the flat portions of the folded negative-electrode sheet, and said at least one polymer electrolyte layer is interposed between the second active material and each segment of the first active material.

A secondary lithium ion polymer battery, comprising:

• at least one positive-electrode collector foil provided with a first active material on a surface thereof;
• at least one negative-electrode collector foil provided with a second active material on a surface thereof;
• and
• at least one polymer electrolyte layer;
• wherein the positive-electrode collector foil, the polymer electrolyte layer, and the negative-electrode collector foil are laminated so that one side edge of the positive-electrode collector foil protrudes from one side edge of the negative-electrode collector foil and the other side edge of the negative-electrode collector foil protrudes from the other side edge of the positive-electrode collector foil,
• wherein insulating films are provided on both side edges of the polymer electrolyte layer over the entire length so as to protrude from the side edges.