Abstract: A rechargeable battery that reduces a production cost by reducing a number of processes of a case is provided. The rechargeable battery includes: a case that houses an electrode assembly; a cap plate that is coupled to an opening of the case; and an electrode terminal that is electrically connected to the electrode assembly to be provided in the cap plate, wherein the cap plate has an inclined portion at a side surface of an outer edge and a modified groove at a corner of an outer surface and is coupled to the opening with the inclined portion while the modified groove becomes narrow.

Abstract: A rechargeable battery that simplifies a structure that implements an external short circuit and that reduces a production cost is provided. The rechargeable battery includes: an electrode assembly that is formed by spiral-winding a first electrode and a second electrode that are disposed at respective surfaces of a separator interposed therebetween; a case that houses the electrode assembly; a cap plate that closes and seals an opening of the case; a first electrode terminal that is connected to the first electrode and that is installed in an insulation state in the cap plate; a second electrode terminal that is connected to the second electrode and that is electrically connected to the cap plate; and a vent plate that is installed in a vent hole of the cap plate and that is short-circuited with the first electrode terminal when the vent hole is opened.

Abstract: A rechargeable battery includes: an electrode assembly; a case housing the electrode assembly; a cap plate closing and sealing an opening of the case; an electrode terminal at an outside of the cap plate with respect to the case, extending through an opening in the cap plate, and electrically connected to the electrode assembly; and an insulating member between the electrode terminal and the cap plate. The electrode terminal includes: a first plate terminal electrically connected to the electrode assembly; a second plate terminal spaced from the first plate terminal; and a fuse connecting the first plate terminal and the second plate terminal and being at least partially surrounded by the insulating member.

Abstract: A rechargeable battery includes: an electrode assembly having a first electrode and a second electrode; an electrode terminal electrically coupled to the electrode assembly; a case that receives the electrode assembly; a cap plate at an opening of the case that closes and seals the case, the cap plate having a vent hole to discharge an internal pressure of the case and having a vent plate that closes and seals the vent hole; and a short circuit member having one end electrically coupled to the electrode assembly and another end that extends along a direction toward the vent hole at the inside of the case. At least a portion of the short circuit member is modified to be drawn outside of the vent hole when the internal pressure is discharged.

Abstract: A rechargeable battery includes: an electrode assembly having a first electrode and a second electrode; an electrode terminal electrically connected to the electrode assembly; a case that receives the electrode assembly; a cap plate at an opening of the case, the cap plate closing and sealing the case and having a vent hole configured to discharge an internal pressure of the case; and a vent module including a vent portion, the vent portion including a buffer portion configured to buffer an impact that is transferred to the vent hole, and a fracture portion that closes and seals the vent hole, wherein the fracture portion is configured to be fractured by the internal pressure.

Abstract: A rechargeable battery includes an electrode assembly; a case housing the electrode assembly; a cap plate sealing an opening of the case; an electrode terminal that is electrically connected to the electrode assembly and extends through a terminal hole of the cap plate and is oriented outside of the cap plate; and an insulating member that electrically insulates the cap plate and the electrode terminal while supporting the electrode terminal at an outer surface of the cap plate.

Abstract: A rechargeable battery includes an electrode assembly having electrodes located on either side of a separator; a case housing the electrode assembly; a cap plate sealing the case; a lead tab that is connected to each of the electrodes; and a terminal that is connected to a respective lead tab and protrudes from the case through a terminal hole, wherein the terminal comprises a different material than the lead tab, and wherein an insulating portion is located between the terminal and the cap plate.

Abstract: A rechargeable battery including an electrode assembly having a first electrode and a second electrode at respective surfaces of a separator; a case that houses the electrode assembly; a cap plate that closes and seals an opening of the case and that is electrically connected to the second electrode; a first electrode terminal that is electrically connected to the first electrode and that is provided at an outer side of the cap plate through a terminal hole in the cap plate; and a second electrode terminal that is directly connected to an outer surface of the cap plate, wherein the second electrode terminal includes a separation portion that is spaced apart from the cap plate; and a support that is connected to the separation portion, the support being supported on the cap plate and including a coupling portion, and wherein the coupling portion is coupled with a corresponding portion of the cap plate.

Abstract: A rechargeable battery, includes an electrode assembly including a first electrode and a second electrode; a case for accommodating the electrode assembly; a cap plate in an opening of the case to seal the case, including a terminal hole, and connected to the first electrode through a lead tab; and first and second electrode terminals electrically coupled to the electrode assembly and protruding away from the cap plate, the first electrode terminal including plurality of lead terminals connected to the cap plate, and a plate terminal supported by the plurality of lead terminals to be spaced apart from the cap plate.

Abstract: A secondary battery includes: a case having an opening; an electrode assembly in the case; a cap plate for sealing the opening of the case; and an electrode unit penetrating through the cap plate, and electrically coupled to the electrode assembly. The electrode unit includes: a current collector coupled to the electrode assembly; and a lead coupled to the current collector and penetrating through the cap plate. The current collector and the lead are coupled to each other by inserting an assembling portion of the lead into an accommodation opening formed in the current collector. Thus, a structure of a coupling portion of the electrode unit for forming charging/discharging paths coupled to the electrode assembly may be improved, and accordingly, an effective internal volume of a case in which the electrode assembly is accommodated and a battery capacity of the electrode assembly may be increased.

Abstract: A battery includes a case having an electrode assembly in an interior thereof, a first electrode unit having a first polarity, the first electrode unit having a first portion exposed to an exterior of the case, and having a second portion electrically coupled to the electrode assembly at a position in the interior of the case, the first and second portions being formed of different metal materials, and a resin seal molding surrounding a joining portion where the first and second portions are joined together.

Abstract: A secondary battery includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate, a case accommodating the electrode assembly, a cap plate sealing the case, and a first terminal unit and a second terminal unit coupled to the cap plate. The first terminal unit includes a first terminal plate that is electrically connected to the first electrode plate, and the second terminal unit includes a second terminal plate that is electrically connected to the second electrode plate, the second electrode plate having a different shape from the first terminal plate.

Abstract: A secondary battery of a secondary battery module includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first and second electrode plates, a case accommodating the electrode assembly, a cap plate coupled to the case, and first and second terminals each having a flat shape and each coupled to the cap plate. The first terminal may include a first terminal plate electrically coupled to the first electrode plate and formed of a first material. The second terminal may include a second terminal plate electrically coupled to the second electrode plate and further including a first part formed of a second material different from the first material, and a second part formed integrally with the first part and formed of the first material.

Abstract: A battery module including a plurality of unit batteries that are disposed along a first direction, each of the unit batteries including a top surface having a terminal, a bottom surface opposite to the top surface, and first, second, third, and fourth side surfaces that are between the top surface and the bottom surface; a retainer; and a housing accommodating the unit batteries and the retainer, wherein the plurality of unit batteries includes a first unit battery, the first unit battery being at least partially surrounded by the retainer, and a second unit battery, the second unit battery being adjacent to the first unit battery and not being surrounded by the retainer.

Abstract: A rechargeable battery includes a case, an electrode assembly disposed in the case, and an insulating member disposed in the case, the insulating member being fixed to the electrode assembly, the insulating member including a first portion and a second portion, the second portion extending from the first portion and contacting the electrode assembly at a coated region of the electrode assembly.