SECONDARY BATTERY HAVING ELECTRODE PLATES MADE OF COMPOSITE SUBSTRATE AND METHOD OF MANUFACTURING SAME

The present disclosure relates to a secondary battery having electrode plates made of composite substrates and a manufacturing method that facilitates the welding of a strip conductor. According to an aspect of the present disclosure, there is provided a secondary battery including an exterior material; an electrode assembly accommodated in the exterior material including an electrode plate in which a coated portion coated with an electrode material and an uncoated portion which is not coated with the electrode material are formed on a composite substrate including a polymer layer and a conductive layer, a conductive plate attached to the conductive layer of the uncoated portion of the electrode plate included in the electrode assembly, and a strip conductor welded to the conductive plate.