A battery cell includes an electrode assembly including a first tab and a second tab located on two ends of the electrode assembly, respectively, in a first direction. The battery cell further includes a first electrode terminal and a second electrode terminal located on two sides of the electrode assembly, respectively, in the first direction, a first adapter configured to couple the first tab and the first electrode terminal, and a second adapter configured to couple the second tab and the second electrode terminal. The first adapter and the second adapter each comprise at least two non-bending portions and at least one bending portion each connecting two adjacent ones of the at least two non-bending portions. A number of the at least two non-bending portions of the second adapter is greater than a number of the at least two non-bending portions of the first adapter.

A battery cell includes an electrode assembly including a first tab and a second tab located on two ends of the electrode assembly, respectively, in a first direction. The battery cell further includes a first electrode terminal and a second electrode terminal located on two sides of the electrode assembly, respectively, in the first direction, a first adapter configured to couple the first tab and the first electrode terminal, and a second adapter configured to couple the second tab and the second electrode terminal. The first adapter and the second adapter each comprise at least two non-bending portions and at least one bending portion each connecting two adjacent ones of the at least two non-bending portions. A number of the at least two non-bending portions of the second adapter is greater than a number of the at least two non-bending portions of the first adapter.

Provided is a secondary battery including an electrode assembly and an exterior body that houses the electrode assembly. In the secondary battery, the exterior body includes a metal plate joined via an insulating material interposed therebetween, and the exterior body has a cavity, and one of a peripheral edge of the cavity and an outer edge of the metal plate is bent so as to be separated from the insulating material.

Provided is a secondary battery including an electrode assembly and an exterior body that houses the electrode assembly. In the secondary battery, the exterior body includes a metal plate joined via an insulating material interposed therebetween, and the exterior body has a cavity, and one of a peripheral edge of the cavity and an outer edge of the metal plate is bent so as to be separated from the insulating material.

Provided is a secondary battery including an electrode assembly and an outer case configured to house the electrode assembly. The secondary battery includes a terminal member provided on the outer case with an insulating material interposed therebetween and connected to a tab of the electrode assembly. The outer case is provided with a cavity through which the tab passes, the terminal member is bonded onto a surface of the outer case with the insulating material interposed therebetween, the surface being positioned around the cavity, and a part of a width dimension of a bonding region provided to surround the cavity for the bonding is reduced.

Provided is a secondary battery including an electrode assembly and an outer case configured to house the electrode assembly. The secondary battery includes a terminal member provided on the outer case with an insulating material interposed therebetween and connected to a tab of the electrode assembly. The outer case is provided with a cavity through which the tab passes, the terminal member is bonded onto a surface of the outer case with the insulating material interposed therebetween, the surface being positioned around the cavity, and a part of a width dimension of a bonding region provided to surround the cavity for the bonding is reduced.

Provided is a secondary battery including an electrode assembly and an exterior body that houses the electrode assembly. In the secondary battery, the exterior body includes a metal plate joined via an insulating material interposed therebetween, and the exterior body has a cavity, and one of a peripheral edge of the cavity and an outer edge of the metal plate is bent toward the insulating material.

Provided is a secondary battery including an electrode assembly and an exterior body that houses the electrode assembly. In the secondary battery, the exterior body includes a metal plate joined via an insulating material interposed therebetween, and the exterior body has a cavity, and one of a peripheral edge of the cavity and an outer edge of the metal plate is bent toward the insulating material.

A button-type secondary battery including an electrode assembly having a first and second electrode tabs; a lower can having an accommodation part, in which the electrode assembly is accommodated and to which the first electrode tab is connected, and a flange part on an outer circumferential surface of the accommodation part; an upper cap on the accommodation part covering the accommodation part and a curl part on an outer circumferential surface of the cover part; a terminal member coupled to the upper cap and connected to the second electrode tab; and an insulating member configured to insulate the terminal member and the upper cap from each other and seal a gap between the terminal member and the upper cap. The flange part and the curl part are coupled to each other in a seaming manner to seal a gap between the lower can and the upper cap.

A button-type secondary battery including an electrode assembly having a first and second electrode tabs; a lower can having an accommodation part, in which the electrode assembly is accommodated and to which the first electrode tab is connected, and a flange part on an outer circumferential surface of the accommodation part; an upper cap on the accommodation part covering the accommodation part and a curl part on an outer circumferential surface of the cover part; a terminal member coupled to the upper cap and connected to the second electrode tab; and an insulating member configured to insulate the terminal member and the upper cap from each other and seal a gap between the terminal member and the upper cap. The flange part and the curl part are coupled to each other in a seaming manner to seal a gap between the lower can and the upper cap.