JP2008243411A5 - - Google Patents

Claims (4)

In a sealed secondary battery in which an electrode group is hermetically sealed in a battery container made of a laminate film, the electrode group is provided with a plain portion of a certain width at the end of at least one electrode and wound in a flat shape together with a counter electrode A pair of lead-out bodies composed of a thin plate-like first and second lead-out bodies are joined to the inner plane of the two half-circumferential parts of the plain part, and at least one end of the pair of lead-out bodies A sealed secondary battery characterized in that a part is taken out from a welded part of the laminate film to form a battery terminal. In the sealed secondary battery in which the electrode group is hermetically sealed in a battery container made of a laminate film, the electrode group is formed by laminating with a counter electrode provided with a plain portion having a constant width at the end of at least one of the electrodes, A pair of lead-out bodies composed of a thin plate-like first and second lead-out bodies are joined to the inner plane of the two half-circumferential portions of the plain part, and at least one end of the pair of lead-out bodies is bonded to the laminate. A sealed secondary battery, wherein the battery terminal is taken out from a welded portion of the film to form a battery terminal. Said pair of lead body, sealed secondary battery according to claim 1 or 2, characterized in that the collector of the same material of the electrodes. The pair of lead-out members on the positive electrode side is made of an aluminum alloy, and the pair of lead-out members on the negative electrode side is made of any one of three layers of copper, nickel, and nickel / copper / nickel. The sealed secondary battery according to claim 1 or 2 .