Patent ID: 8753767
Filing Date: 2014-06-17
Classification: H01M,Y02E,Y02P,Y02T,Y10T

Abstract:
1. A stack-type automobile cell, comprising: an electric power generating element including: a cell outer sheath: a positive electrode terminal lead electrically conductive with the positive electrode and sandwiched between welded portions, formed by the cell outer sheath that has been welded, and extending to an outside of the cell outer sheath; and a negative electrode terminal lead electrically conductive with the negative electrode and sandwiched between welded portions, formed by the cell outer sheath that has been welded, and extending to the outside of the cell outer sheath, wherein a relationship between the thickness of the stack-type automobile cell and a sum of a thickness of the positive electrode active substance layer and a thickness of the negative electrode active substance layer, along the stack direction of the unit electrodes, is defined such that a value obtained by dividing the thickness of the stack-type automobile cell by the sum of the thickness of the positive electrode active substance layer and the thickness of the negative electrode active substance layer is equal to or greater than 10 and equal to or less than 80, the cell outer sheath is rectangular in shape, and a length of one side, other than that of the cell outer sheath from which the positive electrode terminal lead extends to the outside of the cell outer sheath and that of the cell outer sheath from which the negative electrode terminal lead extends to the outside of the cell outer sheath, are each equal to or less than 250 mm, a value obtained by dividing by a cell capacity of the automobile cell one of a following first surface area and a following second surface area whichever is wider is equal to or greater than 30 (cm a width of the positive electrode terminal lead is equal to or greater than 40% and equal to or less than 80% of a length of one side of the cell outer sheath from which the positive electrode terminal lead extends to the outside, a width of the negative electrode terminal lead is equal to or greater than 40% and equal to or less than 80% of a length of one side of the cell outer sheath from which the negative electrode terminal lead extends to the outside, the positive electrode terminal lead and the negative electrode terminal lead extend to the outside from opposing sides of the cell outer sheath, respectively, at least one of the positive electrode terminal lead and the negative electrode terminal lead is selected from Ni, Cu, Al, Fe or an alloy of these metals, and Ni, Al, Fe or the alloy of these metals coated with differing elements of Ni, Ag and Au, and at least one of an average thickness of the positive electrode active substance layer and an average thickness of the negative electrode active substance layer is equal to or greater than 20 μm and equal to or less than 80 μm.