Electrode assembly, secondary battery, battery pack and device
Embodiments of the present disclosure relates to an electrode assembly, a secondary battery, a battery pack and a device. The electrode assembly includes: an electrode unit including an electrode body and an electrode terminal part electrically connected with the electrode body; and a first insulating film for being wound around the electrode unit, the first insulating film including a connection part and an extension part connected with each other, the connection part being provided with an adhesive area for connecting with the electrode terminal part, the extension part being a part of the first insulating film extending beyond an end face of the electrode terminal part, and at least part of the extension part being provided as a non-adhesive area.
1 . An electrode assembly for a secondary battery, the electrode assembly comprising:
an electrode unit comprising an electrode body and an electrode terminal part electrically connected with the electrode body;
a first insulating film for being wound around the electrode unit, the first insulating film comprising a connection part and an extension part connected with each other, the connection part being provided with an adhesive area for connecting with the electrode terminal part, the extension part being a part of the first insulating film extending beyond an end face of the electrode terminal part, and at least part of the extension part being provided as a non-adhesive area; and
a second insulating film for being wound around an outer peripheral surface of the electrode body, a surface of the second insulating film is provided with adhesive glue, and the second insulating film extends to an outer periphery of the electrode terminal part, does not extend beyond the end face of the electrode terminal part, and is laminated on the first insulating film.
2 . The electrode assembly of claim 1 , wherein the connection part comprises a first portion and a second portion connected with each other, the first portion is used to cover an outer peripheral surface of the electrode terminal part, the second portion is used to cover at least a part of an outer peripheral surface of the electrode body, and each of the first portion and the second portion is provided with the adhesive area.
3 . The electrode assembly of claim 1 , wherein the second insulating film and the first insulating film abut with each other at a boundary between the electrode terminal part and the electrode body.
4 . The electrode assembly of claim 1 , wherein the second insulating film and the first insulating film abut with each other on the outer peripheral surface of the electrode terminal part.