Battery manufacturing method and battery

1. A battery manufacturing method, comprising:

providing a first housing, wherein the first housing forms an accommodating cavity, the first housing comprises a bottom wall and a side wall, the side wall extends upward from the bottom wall, the side wall encloses to form an opening, the side wall extends outward from the opening to form a first flange, and at least one first reinforcing part is formed on the first flange;

providing a second housing, wherein the second housing comprises an intermediate part and a second flange, the intermediate part covers the opening, and the second flange is in contact with the first flange;

welding the first flange and the second flange; and

cutting at least part of the first flange after welding the first flange and the second flange to remove at least part of the at least one first reinforcing part,

wherein the first flange and the second flange are welded to form a welding seam located between the first flange and the second flange, the welding seam and the at least one first reinforcing part are spaced apart, a projection of the welding seam projected to the first flange is not overlapped with a projection of each of the at least one first reinforcing part projected to the first flange, and cutting is performed between the welding seam and the at least one first reinforcing part to remove the at least one first reinforcing part.

2. The battery manufacturing method according to claim 1 , wherein the first flange retains 0.1 mm to 5 mm after cutting.

3. The battery manufacturing method according to claim 2 , wherein the at least one first reinforcing part is a first protrusion, and the first protrusion protrudes toward one side of the first flange away from the second housing.

4. The battery manufacturing method according to claim 3 , wherein a second reinforcing part is formed on the second flange; and

the second reinforcing part is a second protrusion, and the second protrusion protrudes toward one side of the second housing away from the first housing; or the first protrusion protrudes toward one side of the first flange away from the second housing to form a groove, and the second protrusion protrudes toward one side of the second housing close to the first housing to be inserted into the groove.

5. The battery manufacturing method according to claim 1 , wherein the first housing is formed with an accommodating cavity, and the accommodating cavity is obtained through stamping a flat plate; or

the accommodating cavity and the at least one first reinforcing part are obtained through synchronously stamping a flat plate.

6. The battery manufacturing method according to claim 5 , wherein the at least one first reinforcing part is a first protrusion, and the first protrusion protrudes toward one side of the first flange away from the second housing.

7. The battery manufacturing method according to claim 6 , wherein a second reinforcing part is formed on the second flange; and

the second reinforcing part is a second protrusion, and the second protrusion protrudes toward one side of the second housing away from the first housing; or the first protrusion protrudes toward one side of the first flange away from the second housing to form a groove, and the second protrusion protrudes toward one side of the second housing close to the first housing to be inserted into the groove.

8. The battery manufacturing method according to claim 1 , wherein the at least one first reinforcing part is disposed on the first flange around the opening; the at least one first reinforcing part is disposed in a length direction of the first flange, and an extension direction of the at least one first reinforcing part is parallel to a width direction of the first flange; the at least one first reinforcing part is disposed in a width direction of the first flange, and an extension direction of the at least one first reinforcing part is parallel to a length direction of the first flange; the at least one first reinforcing part is disposed in a length direction of the first flange, and an extension direction of the at least one first reinforcing part is parallel to the length direction of the first flange; or the at least one first reinforcing part is disposed in a width direction of the first flange, and an extension direction of the at least one first reinforcing part is parallel to the width direction of the first flange.

9. The battery manufacturing method according to claim 8 , wherein the at least one first reinforcing part is a first protrusion, and the first protrusion protrudes toward one side of the first flange away from the second housing.

10. The battery manufacturing method according to claim 9 , wherein a second reinforcing part is formed on the second flange; and

the second reinforcing part is a second protrusion, and the second protrusion protrudes toward one side of the second housing away from the first housing; or the first protrusion protrudes toward one side of the first flange away from the second housing to form a groove, and the second protrusion protrudes toward one side of the second housing close to the first housing to be inserted into the groove.

11. The battery manufacturing method according to claim 1 , wherein the at least one first reinforcing part is a first protrusion, and the first protrusion protrudes toward one side of the first flange away from the second housing.

12. The battery manufacturing method according to claim 11 , wherein a second reinforcing part is formed on the second flange; and

the second reinforcing part is a second protrusion, and the second protrusion protrudes toward one side of the second housing away from the first housing; or the first protrusion protrudes toward one side of the first flange away from the second housing to form a groove, and the second protrusion protrudes toward one side of the second housing close to the first housing to be inserted into the groove.

13. The battery manufacturing method according to claim 1 , wherein before welding the first flange and the second flange, a cell is placed between the first housing and the second housing to seal the cell after welding the first flange and the second flange.

14. A battery, comprising a battery obtained by the battery manufacturing method according to claim 1 .

15. The battery according to claim 14 , wherein a length of the battery is a, a width of the battery is b, and a height of the battery is c, where 2b≤a≤50b and/or 0.5c≤b≤20c; and

400 mm≤a≤2500 mm.