| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sealed alkaline storage battery superior in safety function by forming a cylindrical part in which the center part of a spiral electrode group does not form a blocked state. <P>SOLUTION: The conductive core body 11 used in a negative electrode 10 of the spiral electrode group is constituted of a porous steel plate, a double-sided coated part X on which both faces of the conductive core body 11 are coated with a negative electrode active material 12, and a one-sided coated part Y, on which its one face is coated with the negative electrode active material are formed. A winding part of the negative electrode 10 of the spiral electrode group is constituted of a double-sided exposed part X1, in which the negative electrode active material 12 of both faces of the conductive core body 11 is removed; both faces of the conductive core body 11 are exposed, and a one-sided exposed part X2, in which the negative electrode active material 12 of one face of the conductive core body 11 is removed and only one face of the conductive core body 11 is exposed; and in the first of the winding of the electrode 10 of the innermost circumference of the spiral electrode group, the tip part of the double-sided exposed part X1 is welded to one part of the one-sided exposed part X2 and is made into a cylindrical form. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
