Electrode assembly, secondary battery, battery pack and device

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.