Abstract: The present invention relates to a secondary battery in which a first region and a second region of an insulation sheet are made of different materials, and thus heat conduction between an electrode assembly and a cap plate can be blocked, and the presence or absence of foreign matter can be checked through vision inspection. Disclosed in an embodiment is a secondary battery comprising: an electrode assembly having a first electrode tab and a second electrode tab; a first terminal electrically connected to the first electrode tab of the electrode assembly; an insulation sheet having a first region covering the upper side of the electrode assembly and a second region covering both long sides of the electrode assembly; a case accommodating the electrode assembly, the first terminal, and the insulating sheet; and a cap plate sealing an top opening of the case, wherein in the insulation sheet, the second region is capable of transmitting light.

Abstract: Various embodiments of the present invention relate to a secondary battery, and the technical problem to be solved is to provide a secondary battery having a cathode terminal-integrated cap plate, which prevents the occurrence of weld defects during welding of a bus bar. To this end, the present disclosure provides a secondary battery comprising: a case; an electrode assembly received in the case; and a cap plate coupled to the case so as to protect the electrode assembly, wherein the cap plate includes a terminal part to which the electrode assembly is electrically connected and which is formed integrally with the cap plate, and the terminal part is thicker than the cap plate.

Abstract: Various embodiments of the present invention relate to a secondary battery, and the technical problem to be solved is to provide a secondary battery having a cathode terminal-integrated cap plate, which prevents the occurrence of weld defects during welding of a bus bar. To this end, the present disclosure provides a secondary battery comprising: a case; an electrode assembly received in the case; and a cap plate coupled to the case so as to protect the electrode assembly, wherein the cap plate includes a terminal part to which the electrode assembly is electrically connected and which is formed integrally with the cap plate, and the terminal part is thicker than the cap plate.

Abstract: Embodiments of the present invention are directed toward a rechargeable battery including: an electrode assembly including a first electrode and a second electrode, each of which includes an electrode plate and an electrode uncoated region; a case for accommodating the electrode assembly and having an opening; a cap assembly coupled to the opening to seal the case; and a current collecting member between the cap assembly and the electrode assembly and respectively coupled to an electrode uncoated region of the first electrode and an electrode uncoated region of the second electrode. The current collecting member includes a first current collector that faces one side of the cap assembly, a second current collector that contacts the electrode uncoated region, and a connecting portion that is shifted toward one side of the first current collector and connects the first and second current collectors.

Abstract: A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly including electrodes at opposite sides of a separator, each of the electrodes having a coated region and an uncoated region, and the electrodes and the separator being spirally wound; an insulating case for accommodating the electrode assembly and allowing the uncoated regions to be drawn out through respective uncoated region holes; a case for accommodating the insulating case; and a cap plate coupled to an opening of the case and allowing electrode terminals respectively coupled to the uncoated regions to be drawn out through respective terminal holes.

Abstract: A rechargeable battery including: an electrode assembly; a case containing the electrode assembly; a cap plate covering an opening of the case; a terminal extending outside the cap plate; a lead tab connecting the electrode assembly to the terminal; and a retainer coupled to the lead tab inside the case and arranged between the lead tab and the case, the retainer including an insertion guide facing away from the electrode assembly and being inclined toward the electrode assembly in a direction extending away from the cap plate.

Abstract: A rechargeable battery includes: a first electrode assembly and a second electrode assembly, each of the first and second electrode assemblies including a first electrode and a second electrode, each of the first and second electrodes including an electrode plate and an electrode uncoated region; a case accommodating the first and second electrode assemblies; a cap assembly sealing the case; a first current collecting member electrically connecting the first electrode of the first electrode assembly and the first electrode of the second electrode assembly; and a second current collecting member electrically connecting the second electrode of the first electrode assembly and the second electrode of the second electrode assembly. Each of the first and second current collecting members includes a first current collecting plate coupled with a connecting terminal, and a second current collecting plate, one surface of the second current collecting plate contacting at least one of the electrode uncoated regions.

Abstract: A rechargeable battery includes an electrode assembly comprising electrodes having coated and uncoated regions, being located on opposite sides of a separator and spirally wound together with the separator; a case accommodating the electrode assembly; an insulating plate on the electrode assembly and having a protruding portion and internal terminal holes; and a cap plate sealing the case and having terminal holes, wherein each of the electrode terminals passes through a respective one of the internal terminal holes to protrude from that terminal hole.

Abstract: A rechargeable battery includes an electrode assembly comprising electrodes having coated and uncoated regions and being located at opposite sides of a separator; a case accommodating the electrode assembly; a cap plate sealing the case and having terminal holes through which electrode terminals coupled to the uncoated regions extend; a gasket between each electrode terminal and the cap plate; and a first insulating plate between the cap plate and the electrode assembly and fastened to the gaskets.

Abstract: A secondary battery includes a contact portion on a bottom retainer that contacts a bottom of a case, thus performing a tension function. The secondary battery includes an electrode assembly having a first electrode, a second electrode, and a separator between the first and second electrodes; a case accommodating the electrode assembly therein, having a top and a bottom and an opening in the top of the case; a cap plate closing the opening of the case; a bottom retainer on an upper surface of the bottom of the case, the bottom retainer including a support portion supporting the electrode assembly and at least one contact portion contacting the bottom of the case. As such, the contact portion may absorb external shocks, thus increasing durability and enhancing safety of the secondary battery.

Abstract: A rechargeable battery includes a case having an electrode assembly, a cap plate to seal an opening of the case, and an electrode terminal in the cap plate. The electrode terminal includes a plate terminal at an upper area and a bent plate to electrically couple the plate terminal to the cap plate. The bent plate sets a gap between the plate terminal and the cap plate, and provides a current path from the plate terminal to the cap plate having a length greater than an interval between the plate terminal and the cap plate.

Abstract: A rechargeable battery includes an electrode assembly comprising electrodes having coated and uncoated regions and being located at opposite sides of a separator; a case accommodating the electrode assembly; a cap plate sealing the case and having terminal holes through which electrode terminals coupled to the uncoated regions extend; a gasket between each electrode terminal and the cap plate; and a first insulating plate between the cap plate and the electrode assembly and fastened to the gaskets.

Abstract: A rechargeable battery includes an electrode assembly including first and second electrodes; a case accommodating the electrode assembly; a cap plate having a short-circuit opening; a first terminal coupled to the first electrode; a second terminal coupled to the second electrode; and a short-circuit member at the cap plate, corresponding to the short-circuit opening, and configured to deform to electrically couple the first and second electrodes; and a short-circuit protrusion at the second terminal and configured to contact the short-circuit member, wherein a surface roughness of the short-circuit protrusion is greater than that of the cap plate.

Abstract: A secondary battery having improved safety includes an electrode assembly, a case, and a cap assembly. The electrode assembly has first and second non-coating portions. The case accommodates the electrode assembly. The cap assembly includes a cap plate coupled to the case, and first and second collector plates. In the secondary battery, the first and second non-coating portions and the first and second collector plates are connected or coupled by first and second lead tabs, respectively, and the first and/or second lead tabs include a fuse portion.

Abstract: A battery module includes: a plurality of rechargeable batteries electrically connected in series with each other, each including a short-circuit member that is deformable according to an increase of an internal pressure; and a fuse member including a connection plate overlapping the short-circuit member and a fuse including a first end connected with the connection plate and a second end connected with a first electrode or a second electrode of one of a first rechargeable battery and a second rechargeable battery located at an end along the plurality of rechargeable batteries.

Abstract: A rechargeable battery is provided. The rechargeable battery includes a case, an electrode assembly in the case, a cap plate sealing an opening of the case, and a terminal portion attached to the cap plate. The terminal portion includes a terminal plate on the cap plate and electrically connected to the electrode assembly, and an auxiliary plate electrically connecting the cap plate to the terminal plate. The auxiliary plate has a plurality of openings for reducing a current flow along a short circuit current path.

Abstract: A rechargeable battery including a case including an electrode assembly therein; a cap plate on the case, the cap plate including a short-circuit hole therein; an internal insulator at an inner side of the cap plate, the internal insulator covering the short-circuit hole; first and second electrode terminals that penetrate through the internal insulator and the cap plate and that are electrically connected to the electrode assembly; an external short-circuit part on the cap plate, the external short-circuit part including a membrane electrically connected to the short-circuit hole of the cap plate, the cap plate being electrically connected to the second electrode terminal, and a short-circuit tab electrically connected to the first electrode terminal, the external short-circuit part selectively spacing or short-circuiting the first electrode terminal and the second electrode terminal; and a retainer coupled with the internal insulator, the retainer being between the internal insulator and the electrode assem

Abstract: A rechargeable battery includes: a first electrode assembly and a second electrode assembly, each of the first and second electrode assemblies including a first electrode and a second electrode, each of the first and second electrodes including an electrode plate and an electrode uncoated region; a case accommodating the first and second electrode assemblies; a cap assembly sealing the case; a first current collecting member electrically connecting the first electrode of the first electrode assembly and the first electrode of the second electrode assembly; and a second current collecting member electrically connecting the second electrode of the first electrode assembly and the second electrode of the second electrode assembly. Each of the first and second current collecting members includes a first current collecting plate coupled with a connecting terminal, and a second current collecting plate, one surface of the second current collecting plate contacting at least one of the electrode uncoated regions.

Abstract: A rechargeable battery includes an electrode assembly comprising electrodes having coated and uncoated regions, being located on opposite sides of a separator and spirally wound together with the separator; a case accommodating the electrode assembly; an insulating plate on the electrode assembly and having a protruding portion and internal terminal holes; and a cap plate sealing the case and having terminal holes, wherein each of the electrode terminals passes through a respective one of the internal terminal holes to protrude from that terminal hole.

Abstract: An aspect of an exemplary embodiment of the present invention is directed toward a rechargeable battery for reducing the number of parts for electrically insulating an electrode assembly from a case as well as enabling sizes of the parts to be easily controlled. A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly including electrodes at opposite sides of a separator, each of the electrodes having a coated region and an uncoated region, and the electrodes and the separator being spirally wound; an insulating case for accommodating the electrode assembly and allowing the uncoated regions to be drawn out through respective uncoated region holes; a case for accommodating the insulating case; and a cap plate coupled to an opening of the case and allowing electrode terminals respectively coupled to the uncoated regions to be drawn out through respective terminal holes.