Electrode plate, electrode assembly containing same, and battery

An electrode plate, comprising:

• an electrode plate body, a tab, a first adhesive layer, and a second adhesive layer;
• wherein the tab comprises a connecting portion and an extending portion connected to the connecting portion, the connecting portion overlaps with the electrode body plate and is connected to the electrode plate body, the extending portion protrudes from the connecting portion out of one side of the electrode plate body along a first direction, and the first adhesive layer is disposed on the extending portion;
• wherein,
• the second adhesive layer comprises a first part and a second part, the first part is bonded to a surface of the electrode plate body and covers the connecting portion, the second part is formed by extending the first part from a side of the first part disposed towards the first adhesive layer along the first direction and is bonded to the first adhesive layer;
• and, in a second direction approximately perpendicular to the first direction, a width of the second part is less than a width of the first part.