Patent ID: 7393610
Filing Date: 2008-07-01
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A laminate packaging flat cell, comprising: a laminate film formed by combining polymer and metal with each other; a power generating element formed of a plurality of electrode plates and separators, and hermetically sealed by the laminate film; and an electrode terminal lead coupled to the electrode plate, wherein the power generating element is hermetically sealed by forming a thermally welded portion on an outer periphery of the laminate film, and wherein the electrode terminal lead protrudes from the thermally welded portion in a protruding direction, a plurality of through-holes are provided in the electrode terminal lead in a position thereof contacting the thermally welded portion, the through-holes form first and second rows along a widthwise direction of the electrode terminal lead that is substantially perpendicular to the protruding direction, the through-holes in the first row are arranged to offset to the through-holes in the second row without a gap in the widthwise direction when viewed along the protruding direction, and a ratio of a cross-sectional area of the through-holes to a cross-sectional area of the electrode terminal lead along the widthwise direction ranges from 20 to 50%.