| 摘要 |
The present invention relates to a secondary battery with improved binding force between a negative electrode lead line of an electrode assembly forming the secondary battery and a battery case holding the electrode assembly. The secondary battery with improved binding force between the electrode assembly and the battery case comprises: the battery case wherein a holding space is formed and an electrolyte is injected; the electrode assembly which is inserted in the holding space in the battery case and has a structure of positive electrode plate/separation film/negative electrode plate; a positive electrode lead line connecting the positive electrode plate and battery case; and the negative electrode lead line connecting the negative electrode plate and battery case, and the negative electrode lead line has a folding structure at the end, where the negative electrode lead line comes into contact with the battery case, so that the contact region is overlapped with multiple layers. The secondary battery according to the present invention has the folding structure at the end, thereby improving the binding force between the electrode assembly and the battery case. |
