Abstract: A secondary battery includes an electrode assembly; a can having an opening configured to receive the electrode assembly, wherein the can includes a first stepped portion and a second stepped portion on an inner surface adjacent to the opening and wherein the first and second stepped portions have different depths; a cap assembly comprising a cap plate hermetically sealing the opening of the can; and an insulation case located between the electrode assembly and the cap assembly.

Abstract: A secondary battery including: a bare cell including an electrode assembly, a can to receive the electrode assembly, and a cap assembly attached to an opening of the top of the can; a protection circuit board electrically connected to the bare cell, and a molded resin disposed between the cap assembly and the protection circuit board. The cap assembly includes a cap plate attached to the top of the can and having a through-hole, an electrode terminal extending through the through-hole; and a gasket disposed around the electrode terminal. A portion of the molded resin is disposed in a gap between the electrode terminal and an upper surface of the cap plate.

Abstract: Disclosed is a secondary battery, which includes: an electrode assembly; a can receiving the electrode assembly; and an insulation case provided at an upper part of the electrode assembly inside the can, where a stepped part thinner than the can is formed on an inner surface of an upper part of the can. The insulation case can be inserted to the stepped part and the cap plate can be seated on a second stepped part formed at the upper part of the stepped part and can have protrusions that contact the stepped part. The insulation case and cap plate are stably assembled to the can, thereby improving reliability of the process to weld the cap plate to the upper part of the can.

Abstract: The secondary battery according to the present invention has a vent deformation accelerator which promotes the operation of a vent formed on a wide side of a can in the cap plate, a bottom side of a can or a narrow side of a can so that the vent operates at the low pressure. Therefore, a secondary battery is provided with a vent which operates at a lower pressure than the operating pressure of existing vents. Also, the vent can be formed relatively thick when the operating vent which operates at the same pressure as the operating pressure of an existing vent so that it can avoid forming a vent having a minute thickness, thereby reducing the manufacturing costs and processing time.

Abstract: A secondary battery includes a bare cell having an electrode assembly. The electrode assembly has cathode plates, anode plates and separators insulating the cathode plates from the anode plates. The secondary battery also includes a can housing the electrode assembly, the can having an opening for receiving the electrode assembly and a cap assembly having a cap plate sealing an opening of the can, the cap plate having a terminal through-hole, an electrode terminal inserted into the terminal through-hole, and a gasket insulating the electrode terminal from the terminal through-hole. A protective circuit board is coupled to the bare cell and a molding resin molds the protective circuit board with the bare cell. The gasket includes a coupling extension constraining the molding resin at the cap plate.

Abstract: A prismatic lithium ion battery having an electrode assembly, a prismatic can which receives the electrode assembly and a cap assembly which closes the open end of the prismatic can, wherein two deformed surfaces are formed in each major surface area of the prismatic can opposite to each other, respectively so that they are bent from exterior to interior and indented, and formed in the shape of a band connecting two narrow sides in the longitudinal direction, and formed one by one close to two large sides of the major surface areas but the intermediate parts are close to each other than the ends. In accordance to the present invention, in case that the expansion of the battery or the internal gas generation, the expansion of the battery in the thickness direction is prevented, and the risk, making an internal short-circuit because the insulating case is not pressed to the can as the prismatic can expand, may be reduced.

Abstract: A secondary battery has a safety vent formed on a can accommodating an electrode assembly. The safety vent is formed in a groove shape and the depth of the groove varies. The fracture site of the safety vent is controlled by adjusting the depth of the safety vent. The safety vent is prevented from damaging the electrode assembly when the electrode assembly is inserted in the can, and contacts the safety vent.

Abstract: A secondary battery includes an electrode assembly; a can having an opening configured to receive the electrode assembly, wherein the can includes a first stepped portion and a second stepped portion on an inner surface adjacent to the opening and wherein the first and second stepped portions have different depths; a cap assembly comprising a cap plate hermetically sealing the opening of the can; and an insulation case located between the electrode assembly and the cap assembly.

Abstract: The present invention relates to a secondary battery including an insulating case interposed between the cap assembly and the electrode assembly. The insulating case is made of a sealing material with low thermal deformation, excellent flame-retardation, and excellent electric insulation so as to be able to enhance the reliability of the secondary battery. The secondary battery of the present invention includes a can having an open top, an electrode assembly disposed inside the can and generating electricity, a cap assembly sealing the open top of the can, and an insulating case interposed between the cap assembly and the electrode assembly. The insulating case includes a base having an upper surface and a side surface, and a protrusion formed on the side surface. The upper surface has a deformation hole. The deformation hole and the protrusion are arranged in a manner that a line connecting the center of the deformation hole to the protrusion is substantially perpendicular to the side surface.

Abstract: A secondary battery is provided with a safety vent that can decrease the increased inner pressure of the secondary battery by being rapidly fractured when the inner pressure of the secondary battery is increased over a predetermined value. The secondary battery is constructed with a sealed outer case forming a receiving space in an inner side, an electrode assembly received in the receiving space of the outer case, a safety vent formed on one surface of the outer case, and a fracture induction part formed on the surface of the outer case and disposed at a portion of a circumference region of the safety vent. The fracture induction part is relatively thinner than the other portion of the surface of the outer case.

Abstract: A rechargeable battery including: an electrode assembly; a can to house the electrode assembly; and a cap assembly to seal an opening of the can. The cap assembly includes: a cap plate; an insulation plate disposed upon a lower surface of the cap plate; a terminal plate disposed upon a lower surface of the insulation plate; and an electrode terminal extending through the cap plate, the insulation plate and the terminal plate, and which is electrically coupled to the electrode assembly. The cap plate includes a seat part defined therein, which has a thickness that is less than an overall thickness of the cap plate. The insulation plate is seated in the seat part, which has a width is the same as an overall width of the cap plate.

Abstract: A secondary battery including an electrode assembly having a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode and a can housing the electrode assembly, the can having an opening on one end. The secondary battery further includes a cap assembly having a cap plate having a terminal hole, the cap plate coupled to the opening of the can, an electrode terminal inserted through the terminal hole, and a terminal plate coupled with an interior end of the electrode terminal. The terminal plate has a placement recess located on an interior-facing surface, the placement recess preventing the interior end of the electrode terminal from protruding past the interior-facing surface of the terminal plate.

Abstract: Disclosed is a secondary battery, which includes: an electrode assembly; a can receiving the electrode assembly; and an insulation case provided at an upper part of the electrode assembly inside the can, where a stepped part thinner than the can is formed on an inner surface of an upper part of the can. The insulation case can be inserted to the stepped part and the cap plate can be seated on a second stepped part formed at the upper part of the stepped part. The insulation case and cap plate are stably assembled to the can, thereby improving reliability of the process to weld the cap plate to the upper part of the can.

Abstract: A secondary battery has a safety vent formed on a can accommodating an electrode assembly. The safety vent is formed in a groove shape and the depth of the groove varies. The fracture site of the safety vent is controlled by adjusting the depth of the safety vent. The safety vent is prevented from damaging the electrode assembly when the electrode assembly is inserted in the can, and contacts the safety vent.

Abstract: A secondary battery is provided with a safety vent that can decrease the increased inner pressure of the secondary battery by being rapidly fractured when the inner pressure of the secondary battery is increased over a predetermined value. The secondary battery is constructed with a sealed outer case forming a receiving space in an inner side, an electrode assembly received in the receiving space of the outer case, a safety vent formed on one surface of the outer case, and a fracture induction part formed on the surface of the outer case and disposed at a portion of a circumference region of the safety vent. The fracture induction part is relatively thinner than the other portion of the surface of the outer case.

Abstract: A can type lithium secondary battery preventing a cap assembly having a terminal plate from being deformed due to a spinning pressure introduced by an insertion of an electrode terminal by forming a reinforcing part on a terminal plate includes an electrode assembly having a first electrode plate, a second electrode plate and a separator formed between the first and second electrode plates, a can receiving the electrode assembly and an electrolyte, and a cap assembly including a cap plate, an insulation plate, a terminal plate with a reinforcing part for preventing the deformation of the terminal plate, an electrode terminal, and a gasket coupled to an upper end opening of the can.

Abstract: A rechargeable battery including: an electrode assembly; a can to house the electrode assembly; and a cap assembly to seal an opening of the can. The cap assembly includes: a cap plate; an insulation plate disposed upon a lower surface of the cap plate; a terminal plate disposed upon a lower surface of the insulation plate; and an electrode terminal extending through the cap plate, the insulation plate and the terminal plate, and which is electrically coupled to the electrode assembly. The cap plate includes a seat part defined therein, which has a thickness that is less than an overall thickness of the cap plate. The insulation plate is seated in the seat part, which has a width is the same as an overall width of the cap plate.

Abstract: The present invention relates to a secondary battery including an insulating case interposed between the cap assembly and the electrode assembly. The insulating case is made of a sealing material with low thermal deformation, excellent flame-retardation, and excellent electric insulation so as to be able to enhance the reliability of the secondary battery. The secondary battery of the present invention includes a can having an open top, an electrode assembly disposed inside the can and generating electricity, a cap assembly sealing the open top of the can, and an insulating case interposed between the cap assembly and the electrode assembly. The insulating case includes a base having an upper surface and a side surface, and a protrusion formed on the side surface. The upper surface has a deformation hole. The deformation hole and the protrusion are arranged in a manner that a line connecting the center of the deformation hole to the protrusion is substantially perpendicular to the side surface.

Abstract: A secondary battery includes an insulation case that is thickly formed to prevent deformation and that includes a recess that receives at least a part of a cap assembly in the insulation case so as minimize unnecessary space between the cap assembly and the insulation case.

Abstract: A prismatic lithium ion battery having an electrode assembly, a prismatic can which receives the electrode assembly and a cap assembly which closes the open end of the prismatic can, wherein two deformed surfaces are formed in each major surface area of the prismatic can opposite to each other, respectively so that they are bent from exterior to interior and indented, and formed in the shape of a band connecting two narrow sides in the longitudinal direction, and formed one by one close to two large sides of the major surface areas but the intermediate parts are close to each other than the ends. In accordance to the present invention, in case that the expansion of the battery or the internal gas generation, the expansion of the battery in the thickness direction is prevented, and the risk, making an internal short-circuit because the insulating case is not pressed to the can as the prismatic can expand, may be reduced.