Safe battery cell pole piece structure and lithium ion battery

The invention belongs to the technical field of batteries, and particularly relates to a safe battery cell pole piece structure which comprises a current collector, one end of the current collector is coated with the safety coating; the insulating layer is coated at the other end of the current collector; wherein one ends, opposite to each other in the length direction, of the safety coating and the insulating layer are respectively provided with a first thinned area and a second thinned area, and the second thinned area is lapped on the first thinned area. By optimizing the coating structure of the pole piece, the safety performance of the battery cell can be improved. In addition, the invention also discloses a lithium ion battery. 本发明属于电池的技术领域，具体涉及一种安全电芯极片结构，包括集流体；安全涂层，涂覆在所述集流体的一端；绝缘层，涂覆在所述集流体的另一端；其中，所述安全涂层和所述绝缘层在长度方向相对的一端分别设有第一削薄区和第二削薄区，所述第二削薄区搭接在所述第一削薄区上。本发明通过优化极片的涂覆结构，能够改善电芯的安全性能。此外，本发明还公开了一种锂离子电池。