Lithium battery winding structure and lithium ion battery

The invention discloses a lithium battery winding structure which is characterized in that a winding core is provided with X folds, a first tab is positioned at the Mth fold, a second tab is positioned at the Nth fold, M is less than X, and N is less than X; the length of the long film surface of the first pole piece is A, the distance between the first tab groove and the edge of the first pole piece in the length direction is a, the length of the long film surface of the second pole piece is B, the distance between the second tab groove and the edge of the second pole piece in the length direction is b, and a/A is greater than or equal to (M-1)/X and less than or equal to M/X; (N-1)/X < = b/B < = N/X. By optimizing the position of the tab, the tab position gummed paper is prevented from being located on the same layer, and the risk of lithium precipitation of the pole piece can be reduced. In addition, the invention also discloses a lithium ion battery. 本发明公开了一种锂电池卷绕结构，卷芯具有X折，所述第一极耳位于第M折处，所述第二极耳位于第N折处，其中，M＜X