	US 12,278,389 B2
	Battery rupture vent structure and method for manufacturing same, battery cover, and battery
Jianju Li, Guangdong (CN); and Zhongtao Zhang, Guangdong (CN)
Assigned to SHENZHEN KEDALI INDUSTRY CO., LTD, Guangdong (CN)
Appl. No. 17/413,445
Filed by SHENZHEN KEDALI INDUSTRY CO., LTD, Guangdong (CN)
PCT Filed Mar. 28, 2019, PCT No. PCT/CN2019/079979 § 371(c)(1), (2) Date Jun. 11, 2021, PCT Pub. No. WO2020/118966, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 201822104668.7 (CN), filed on Dec. 14, 2018.
Prior Publication US 2022/0059900 A1, Feb. 24, 2022
Int. Cl. H01M 50/342 (2021.01); H01M 50/147 (2021.01); H01M 50/148 (2021.01); H01M 50/172 (2021.01); H01M 50/562 (2021.01)

CPC H01M 50/3425 (2021.01) [H01M 50/147 (2021.01); H01M 50/148 (2021.01); H01M 50/172 (2021.01); H01M 50/562 (2021.01)]

12 Claims

1. A method for manufacturing a vent structure, wherein the vent structure comprises a vent, and the method comprises:

providing, with a first depth, a first notch having no intersection on a surface of the vent; and

providing a second notch having a second depth on part of the first notch in a direction of the first depth, wherein the direction of the first depth is a direction perpendicular to the surface of the vent, a shape of the first notch is oval, the second notch is located at an arc portion of the first notch and a part of a straight-line portion of the first notch, the second notch covers the part of a straight-line portion of the first notch in the direction of the first depth, another part of the straight-line portion of the first notch is not covered by the second notch in the direction of the first depth, and the first notch is punched first with a puncher pin and then the second notch is punched with a puncher pin.