A button-type secondary battery having a cup which has an opened upper side and in which an electrode assembly and an electrolyte are mounted; a top plate which is coupled to an upper end of the cup to close the opened upper side of the cup and in which a through-hole is formed; a positive electrode terminal including a protrusion having a diameter capable of being inserted into the through-hole and a hook having a diameter greater than that of the through-hole, the protrusion being inserted into the through-hole so that the hook is disposed outside or inside the cup; and a gasket inserted to insulate a portion at which the protrusion and the hook are in contact with the top plate when the protrusion of the positive electrode terminal is inserted into the through-hole. The gasket bonds the positive electrode terminal to the top plate.

A secondary battery that includes an electrode assembly and an exterior body housing the electrode assembly. The exterior body includes a cup-shaped exterior member and a lid-shaped exterior member connected to each other by a welded part. An end part of at least one of the cup-shaped exterior member and the lid-shaped exterior member includes a stepped part on an inner surface thereof. The stepped part includes a first extending surface and a second extending surface extending in substantially a same direction and having different heights from each other, and a stepped surface connecting the two extending surfaces. The welded part is in a part of the stepped part, and the stepped surface of the stepped part is separated from an opposed part of the exterior body.

A secondary battery that includes an electrode assembly and an exterior body housing the electrode assembly. The exterior body includes a cup-shaped exterior member and a lid-shaped exterior member connected to each other by a welded part. An end part of at least one of the cup-shaped exterior member and the lid-shaped exterior member includes a stepped part on an inner surface thereof. The stepped part includes a first extending surface and a second extending surface extending in substantially a same direction and having different heights from each other, and a stepped surface connecting the two extending surfaces. The welded part is in a part of the stepped part, and the stepped surface of the stepped part is separated from an opposed part of the exterior body.

A battery is provided comprising an anode cap on a first side, and a cathode can on the opposing second side. The anode cap and cathode can be configured together to provide a cylindrical shaped round shaped battery with a peripheral side wall. The battery is modified to have one or more sharp protrusions extending from the peripheral side wall to increase the width and or height of the battery.

A battery is provided comprising an anode cap on a first side, and a cathode can on the opposing second side. The anode cap and cathode can be configured together to provide a cylindrical shaped round shaped battery with a peripheral side wall. The battery is modified to have one or more sharp protrusions extending from the peripheral side wall to increase the width and or height of the battery.

The present disclosure discloses a cylindrical or button battery. The battery includes a cap, a shell and a ring seal, wherein the cap and the shell are both of a tubular structure having a cover portion and are fitted together to form a hermetic space for accommodating a battery cell; the ring seal is located between a side wall of the cap and a side wall of the shell and is capable of shrinking or being torn when reaching a set temperature so as to form a slit between the side wall of the cap and the side wall of the shell to release pressure. The ring seal of the battery can shrink or be torn at the set temperature to release pressure, and therefore the battery is characterized by excellent safety.

The present disclosure discloses a cylindrical or button battery. The battery includes a cap, a shell and a ring seal, wherein the cap and the shell are both of a tubular structure having a cover portion and are fitted together to form a hermetic space for accommodating a battery cell; the ring seal is located between a side wall of the cap and a side wall of the shell and is capable of shrinking or being torn when reaching a set temperature so as to form a slit between the side wall of the cap and the side wall of the shell to release pressure. The ring seal of the battery can shrink or be torn at the set temperature to release pressure, and therefore the battery is characterized by excellent safety.

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 accommodating the electrode assembly and coupled to the first electrode tab; and a cap assembly sealing an opening in the case. The cap assembly includes: a cap plate covering the opening in the case; and a terminal plate coupled to the cap plate. The terminal plate includes: a flange portion coupled to and electrically insulated from the cap plate; and a tab connecting portion protruding from the flange portion toward the electrode assembly and extending through a terminal opening in the cap plate to be coupled to the second electrode tab. The terminal plate has a flat outer surface, and the tab connecting portion has a flat inner surface.

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 accommodating the electrode assembly and coupled to the first electrode tab; and a cap assembly sealing an opening in the case. The cap assembly includes: a cap plate covering the opening in the case; and a terminal plate coupled to the cap plate. The terminal plate includes: a flange portion coupled to and electrically insulated from the cap plate; and a tab connecting portion protruding from the flange portion toward the electrode assembly and extending through a terminal opening in the cap plate to be coupled to the second electrode tab. The terminal plate has a flat outer surface, and the tab connecting portion has a flat inner surface.

A button cell includes a housing and a cover plate assembly, the housing including a bottom wall and an annular side wall integrally formed with the bottom wall, the cover plate assembly including a head cover, a conductive member and a conductive covering member. The middle area of the head cover has a through hole, and the conductive member covers the through hole and is connected with the head cover in an insulated manner; the outer edge of the head cover is welded with the top end of the side wall to form an accommodating cavity for accommodating an electrode assembly and electrolyte; the conductive member has a liquid injection port for injecting electrolyte into the accommodating cavity, and the conductive covering member covers the liquid injection port and is electrically connected with the conductive member. An electronic equipment includes an electronic equipment body and the button cell.