Case, battery, power consuming device, and method for assembling case

A case for a battery comprising:

• a first case body provided with an opening;
• an accommodating groove provided in a peripheral direction of the opening;
• a sealant accommodated in the accommodating groove;
• a holder arranged in the first case body wherein an inner peripheral wall of the first case body and the holder jointly define the accommodating groove;
• a first locking member via which the holder is connected to the first case body;
• and
• a second case body provided with a peripherally-arranged joint part wherein the joint part extends into the accommodating groove and is joined with the sealant,
• wherein the second case body covers the opening so as to form a sealed connection between the first case body and the second case body,
• wherein the holder comprises a stepped surface formed between a first peripheral surface and a second peripheral surface wherein the stepped surface is a bottom wall of the accommodating groove
• wherein the joint part is provided with a notch for avoiding the first locking member and sealant completely covers the notch.