SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a secondary battery withstanding strong vibration and shock, reduced in assembling cost, also reduced in inner resistance, and having a high output. SOLUTION: This battery is provided with: an electrode plate group 5 in which a positive electrode plate and a negative electrode plate are opposed via a separator, and which is composed by being wound around by a winding core 3 as the axis, and in which a core material that a mixture layer of the positive electrode plate is not applied to is exposed on one end face in the width direction and the core material that a mixture layer of the negative electrode plate is not applied to is exposed on the other end face; a positive electrode current collecting plate 16 connected to the one end face of the electrode plate group 5; a negative electrode current collecting plate 6 connected to the other end face of the electrode plate group 5; a negative terminal 11 fixed to the winding core 3 together with either of negative electrode current collecting plates 6 by a connecting member 17; an exterior case 2 to house the electrode plate group 5; an upper cap body 7 and a lower cap body 4 which seal an aperture of the exterior case 2 and in which the negative terminal 11 is penetrated through the battery via insulation rings 8, 10; and an electrolytic solution which is impregnated inside the electrode plate group 5. COPYRIGHT: (C)2005,JPO&NCIPI