A secondary battery includes a battery device, a container, and a cover part. The container contains the battery device. The cover part includes a cover member and a valve member. The cover member includes a first flange. The valve member includes a second...

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, a separator between the first and second electrodes, and first and second electrode tabs respectively coupled to the first and second electrodes; a case...

A cylindrical secondary battery includes: an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate; a cylindrical can accommodating the electrode assembly and being electrically connected to the negative elect...

A cap assembly includes a base portion having a through-hole, a protrusion joined to the base portion, the protrusion extending downward from a lower end of the through-hole, an electrode terminal at least partially inserted into the protrusion, the electr...

A cap assembly includes a vent deformable in response to a change in pressure, a cap-up on the vent and connected to an external terminal, the vent surrounding a portion of an upper surface and a side surface of an outer edge of the cap-up, a cap-down that...

Disclosed is a safe cylindrical battery, including a battery housing, wherein a core assembly is arranged in the battery housing, and the core assembly includes an electrode sheet, a compact full electrode lug, and a channel full electrode lug; the compact...

Embodiments of the present application provide a battery cell, a battery, an electrical device, and a manufacturing method and device for the battery cell, which belong to the technical field of batteries. Herein, the battery cell comprises an electrode as...

A cap assembly (100, 200) for a lithium ion secondary battery (1000, 2000). The cap assembly includes a cap plate (30, 97), a leakproof film (20, 98), and a cap cover (10, 99). The cap plate (30, 97) includes a supporting portion (31, 971) and a safety fil...