Battery, method for manufacturing same, and electrical device

A method for manufacturing a battery, comprising:

• providing a plurality of battery cells, wherein the plurality of battery cells are arranged along a first direction;
• each of the battery cells comprises two first side faces disposed opposite to each other in the first direction, two second side faces disposed opposite to each other in a second direction, a top face and a bottom face disposed opposite to each other in a third direction, and two electrode terminals;
• the first direction, the second direction, and the third direction are orthogonal to each other;
• and the first side faces are larger than the second side faces in area;
• providing a cooling component, wherein the cooling component contains a cooling medium to cool the battery cells, the cooling component comprises a cooling unit and an integrated unit;
• the cooling unit is in a plate shape formed by a first cooling wall and a second cooling wall that are opposite to each other in the first direction;
• and a channel available for flow of the cooling medium is formed between the first cooling wall and the second cooling wall;
• creating a fragile portion, and creating the fragile portion on the first cooling wall and the second cooling wall separately, so that, when the battery is abnormal, the fragile portion is able to rupture to release the cooling medium;
• and
• placing the cooling unit between two adjacent battery cells, wherein
• the fragile portion comprises a thin-walled portion, and a wall thickness of the thin-walled portion is less than a wall thickness of a remaining part of the first cooling wall and the second cooling wall;
• the first cooling wall and the second cooling wall each comprise an inner wall face and an outer wall face, and the thin-walled portion is formed by reducing the wall thickness by starting from the inner wall face of the first cooling wall and the inner wall face of the second cooling wall;
• and
• an area of the first cooling wall is the same as the area of the first side face that faces the first cooling wall and an area of the second cooling wall is the same as the area of the first side face that faces the second cooling wall.