Abstract: A method of producing an electrode-separator winding includes feeding a first current collector, feeding a second current collector, feeding two separators in strip form to a winding device, and winding the first and second current collectors and the separators to form a winding with a sequence, wherein a contact strip is welded on at least one of the contact sections of the current collectors, or at least one of the contact sections is folded over to form a contact strip, and at least one of the separators is reinforced in at least one risk region in which the at least one separator within the completed electrode-separator winding lies against the at least one contact section in which the contact strip is welded on or against the at least one contact section folded over to form a contact strip.

Abstract: A miniature electrochemical cell having a volume of less than 0.5 cc is described. The cell casing has a ceramic substrate, preferably of alumina, that is part of a metal-containing feedthrough formed by co-firing a metallic paste in a via hole extending through a green state ceramic. The sintered feedthrough serves as a header assembly that is then joined to an open-ended container by a gold-braze to thereby provide the cell casing. The metallic container serves as a terminal for one of the electrodes, for example the anode, while the metal fill material resulting from sintering the metallic paste serves as the opposite polarity terminal, for example the positive terminal for the cathode.

Abstract: A high capacity primary electrochemical lithium cell includes an anode comprising metallic lithium, a hybrid cathode comprising a liquid SO2 cathode and a solid cathode including a cathode material characterized by having a first electromotive force (EMF) when coupled to a metallic lithium anode. The first EMF is greater than a second EMF of a cell having a metallic lithium anode and a liquid SO2 cathode. A separator may separate the anode from the solid cathode. The cell includes an electrolyte solution including at least one ionizable salt dissolved in at least one organic solvent. The solid cathode material may include carbon monofluoride (CFX), a transition metal oxide, a mixture of two or more transition metal oxides or any combinations of such cathode materials. The solid cathode may also include a binder and a carbon based conductive material.

Abstract: A miniature electrochemical cell having a volume of less than 0.5 cc is described. The cell has a casing of first and second ceramic substrates that are hermetically secured to each other to provide an internal space housing an electrode assembly. First and second conductive pathways extend through the ceramic substrates. The pathways have respective inner surfaces that are conductively connected to the respective anode and cathode current collectors and respective outer surfaces that provide for connection to a load. An electrolyte in the internal space of the housing activates the electrode assembly.

Abstract: A cover assembly and a battery comprising the same are provided. The cover assembly comprises: a cover plate body formed with at least a via hole penetrating therethrough; a cover plate connecting member hermetically connected with the cover plate body at the via hole, which is formed with an electrode receiving hole therein; and an electrode terminal penetrating through the electrode receiving hole to be hermetically connected with and insulated from the cover plate connecting member for leading out a current.

Abstract: A lithium battery (1) has a battery module (2), a battery package (5) for holding the battery module (2) therein, and leads (4) extending from the battery module (2) and projecting outside from the battery package (5). The battery package (5) is formed from a laminated sheet (10), and a peripheral part (9) of the battery package (5) is heat-sealed. Lead-insulating films (6) are interposed between the peripheral part (9) of the package (5) and the leads (4). Each of the lead-insulating films includes a heat-resistant base film (22), a polyolefin resin layer (21) formed on one of the surfaces of the base film (22) on the side of the laminated sheet (10), and an acid-modified polyolefin resin layer (23) formed on the other surface of the base film (22) on the side of the lead (4).

Abstract: An electrochemical energy store (10), comprising a housing (12) for accommodating at least one cell unit (24), wherein the housing (12) forms a receptacle space for the arrangement of the cell unit (24), wherein a surface (17) of the housing (12) facing the receptacle space is completely covered by an electrically insulating material (27), wherein the housing (12) also comprises an opening (20) for filling a fluid electrolyte into the receptacle space, and wherein the opening (20) is covered by two overlapping end regions (26, 28) of the electrically insulating material (27). An energy store (10) according to the invention permits a simple means of bringing about sealed internal insulation of a housing (12) accompanied by simultaneously improved manufacturability.

Abstract: Provided is a battery in which a positive electrode and a negative electrode, to which electrode composite materials are seamlessly applied, are wound and accommodated in an exterior member, the battery having a part where foil exposed surfaces of the positive electrode and the negative electrode face each other with an insulator therebetween, the foil exposed surfaces being formed at one-side application parts on an outer side of the winding of the respective electrodes.

Abstract: A sealed battery including a bottomed cylindrical outer can having an opening, the opening and a sealing body being crimp-sealed with an insulating gasket interposed therebetween, is disclosed. The sealing body includes a first plate-shaped member and a second plate-shaped member bonded to a surface of the first plate-shaped member, the surface facing the outside of the battery. At least the first plate-shaped member is crimp-sealed at an outer periphery thereof, and the crimp-sealed plate-shaped member has a thin portion on at least one surface thereof, the thin portion serving as a starting point of deformation of the sealing body when a battery internal pressure increases. When the battery internal pressure increases, the sealing body is deformed so that a gap is formed between the insulating gasket and the sealing body and gas in the outer can is vented to the outside of the outer can.

Abstract: A rechargeable battery is provided, which includes a protection layer with an inversion plate, thereby improving safety by preventing the inversion plate from malfunctioning. In one example embodiment, the rechargeable battery includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate, a case accommodating the electrode assembly, and a cap assembly coupled to the case, wherein the cap assembly comprises a cap plate sealing the case and having a short-circuit opening, an inversion plate installed in the short-circuit opening of the cap plate, and a connection plate installed to cover the short-circuit opening of the cap plate, and a protection layer having a higher melting point than the cap plate is formed under the inversion plate.

Abstract: There is provided a prismatic secondary battery having high reliability and including a connecting part, wherein a terminal member and an external conduction member are connected by a swaged part and a welded part. The terminal member includes a flange, a first connecting part formed on a first surface side of the flange, and a second connecting part formed on a second surface side of the flange. The flange and the second connecting part are disposed on a battery exterior side than a sealing body. The first connecting part penetrates a through-hole formed in the sealing body. The second connecting part penetrates a through-hole formed in an external conduction member. The second connecting part includes a tip part swaged on the external conduction member. An abutting part of a tip of the swaged part of the second connecting part and a protruding part of the external conduction member is weld-connected.

Abstract: A battery includes a case accommodating an electrode assembly, the case including an opening at one end and including at least one sidewall, the sidewall having a coupling portion adjacent to the opening, a cap plate that closes the opening, the cap plate having an upper surface, the coupling portion of the sidewall connecting the cap plate to the case, the coupling portion including a top surface of the sidewall, the cap plate overlying a first portion of the top surface of the sidewall, such that the upper surface of the cap plate is entirely above top surface of the sidewall, and a welding bead contacting the cap plate and a second portion of the top surface of the sidewall, the second portion of the top surface being between the first portion and an outer surface of the sidewall.

Abstract: The invention relates to a battery cell (10) having a cell housing (12) which comprises a housing container (14) and a housing cover (16), two electrodes that are arranged in an inner region of the housing container (14), an electrolyte material that is arranged in the inner region of the housing container (14) and that surrounds the electrodes, and two electrical contacts which in each case are electrically coupled to one of the electrodes and which extend from the inner region of the housing container (14) through the housing cover (16) into a region outside of the cell housing (12), wherein the housing cover (16) has an overlap area (18) at an outer edge, in which overlap area the housing cover (16) and an edge region of the housing container (14) are arranged parallel to each other, wherein in the overlap area (18) a flanged seam (20) is formed, in order to close the cell housing (12).

Abstract: A mercury-free lead-free button battery includes a negative cap, a cathode material, a gasket ring, a positive can, an anode material, and a diaphragm. The positive can and the negative cap are combined. The gasket ring is clamped between the positive can and the negative cap for separating the positive can from the negative cap. The cathode material is arranged on the bottom of the positive can. The diaphragm is arranged on the cathode material. The anode material is arranged between the negative cap and the diaphragm. A partition unit is arranged between the negative cap and the anode material for separating the anode material from the negative cap and conductively connecting the anode material and the negative cap. The partition unit ensures disconnection between the anode material and the negative cap and therefore safety of the battery by preventing expansion, weeping and even that would otherwise happen.

Abstract: A jelly-roll type battery unit, a winding method thereof and a lithium secondary battery comprising the battery unit include a first electrode plate having a first electrode current collector with a first electrode tab and a first electrode active material layer coated on at least one surface of the first electrode current collector, a second electrode plate having a second electrode current collector with a second electrode tab and a second electrode active material layer coated on at least one surface of the second electrode current collector, and a separator that is interposed between the first electrode plate and the second electrode plate, wherein the electrode tab is incorporated into the electrode current collector in an area of either the first or the second electrode plate where the corresponding electrode active material layer is not coated.

Abstract: A secondary battery includes an electrode assembly including a pair of electrodes separated from each other by a separator, a battery case including a front portion bonded to a back portion to produce wing portions at opposite edges of the battery case, the electrode assembly being arranged within an accommodating portion of the battery case, the accommodating portion being arranged between the wing portions, an insulating member arranged at each of said wing portions of the battery case and a bonding portion arranged at each of said wing portions to attach said wing portions to the accommodating portion of the battery case. The bonding portion may be a double sided tape and may be integrally provided with the insulating member to simplify manufacturing process thereof.

Abstract: Disclosed is a battery pack which includes: a battery case comprising a first case member and a second case member, which in combination define an enclosed space, the first case member comprising a first sealing portion, the second case member comprising a second sealing portion, wherein the first and second sealing portions adhere to each other for sealing the enclosed space; an electrode assembly contained in the enclosed space, the electrode assembly comprising a first electrode plate, a second electrode plate, and a separator disposed between the first and second electrode plates; an electrolyte contained in the enclosed space; and a pocket formed in at least one of the first and second sealing portions, wherein the pocket contains an ionic material.

Abstract: Various embodiments include a fuel cell stack seal application method including the step of applying a seal paste to a fuel cell, placing the fuel cell in a fuel cell stack, and thermally treating the fuel cell stack to set the seal paste into a seal. Further embodiments include applying the seal paste to an interconnect using stencil printing.

Abstract: A pouch, in which an electrode assembly of a battery is held, including a frame, including a groove into which the electrode assembly is inserted with a front of the electrode assembly temporarily exposed, upper and lower flanges bordering upper and lower ends of the groove, and extended parts on either side of the groove, front and upper sealing parts formed when the extended parts are folded over the front of the electrode assembly and the upper and lower flanges and sealed together and to the upper flange, respectively, the front and upper sealing parts defining a pocket in which an electrolyte solution is injected toward the electrode assembly, and a lower sealing part formed when the folded extended parts are sealed to the lower flange.

Abstract: A battery having an electrode assembly located in a housing that efficiently utilizes the space available in many implantable medical devices is disclosed. The battery housing provides a cover and a shallow case a preferably planar, major bottom portion, an open top to receive the cover opposing the bottom portion, and a plurality of sides being radiused at intersections with each other and with the bottom to allow for the close abutting of other components located within the implantable device while also providing for efficient location of the battery within an arcuate edge of the device. The cover and the shallow case being substantially hermetically sealed by a laser weld technique and an insulator member disposed within the case to provide a barrier to incident laser radiation so that during welding radiation does not impinge upon radiation sensitive component(s) disposed within the case.

Abstract: A battery is provided with a base portion provided on the base end side of a columnar rivet portion. A terminal rivet is formed, on that surface of the base portion on which the rivet portion is located, with a sloped seat surface having a height which increases as one moves closer to the rivet section and provided at the entire circumference around the rivet section. The battery is also provided with an annular elastic member and a hard member having higher hardness than the elastic member and provided with a first hole having a diameter greater than the outer diameter of the elastic member and smaller than the outer diameter of the sloped seat surface. The terminal rivet is mounted such that the base portion and a current collecting part are located inside a battery case and such that the rivet portion penetrates through a hole in the battery case to project outward.

Abstract: A battery packaging method comprises providing a battery comprising at least one battery cell on a substrate, the battery cell comprising a plurality of electrodes about an electrolyte, and the battery having at least one open peripheral side surface. A thermoplastic bead is provided at an open peripheral side surface of the battery. A cap is placed over the battery and in contact with the thermoplastic bead. The thermoplastic bead is locally heated by directing an energy beam onto the thermoplastic bead, the energy beam having a beam width sized sufficiently small to heat a beam incident region on the thermoplastic bead substantially without heating adjacent regions.

Abstract: A rechargeable battery includes an electrode assembly having a separator between electrode plates, a case accommodating the electrode assembly, a cap plate coupled to an opening of the case, an electrode terminal through a terminal hole in the cap plate, a gasket between the electrode terminal and an interior circumference of the terminal hole, an insulator between the cap plate and the electrode terminal, a portion of the gasket being between the insulator and the electrode terminal, and a sealing member between the gasket and the insulator, the sealing member extending continuously along a first surface of the gasket and along a first surface of the insulator, the first surface of the gasket and the first surface of the insulator being non-parallel to each other.

Abstract: A method for encapsulating a thin-film lithium-ion type battery, including the steps of: forming, on a substrate, an active stack having as a lower layer a cathode collector layer extending over a surface area larger than the surface area of the other layers; forming, over the structure, a passivation layer including through openings at locations intended to receive anode collector and cathode collector contacts; forming first and second separate portions of an under-bump metallization, the first portions being located on the walls and the bottom of the openings, the second portions covering the passivation layer; and forming an encapsulation layer over the entire structure.

Abstract: Disclosed is a sealing material composition for a secondary battery, which is capable of providing a safe sealing layer that exhibits excellent adhesion in the sealing portion, while preventing leakage of the electrolyte solution. Specifically disclosed is a sealing material composition for a secondary battery, which is characterized by containing a diene rubber, a thermoplastic elastomer, carbon and an organic liquid material. The sealing material composition for a secondary battery is also characterized in that the number of coarse particles contained in 3 mL of the composition is 10 or less, said coarse particles having a maximum diameter of 10 ?m or more.

Abstract: A modular battery includes: a first battery cell having a first electrode surface; a second battery cell having a second electrode surface; a compressible interconnector connecting the first battery cell and the second battery cell; and a polymeric material holding the first battery cell against the second battery cell with the interconnector in a compressed state. A method is also provided.

Abstract: Provided is an electrical energy storage device including an electrode winding body, which includes a positive electrode generating electrons by oxidation and reduction, a negative electrode for absorbing the generated electrons, and separation layers for physically separating the negative electrode from the positive electrode, which are sequentially wound around a winding core, and an electrolyte provided between the positive electrode and the negative electrode, the electrical energy storage device including: a terminal plate for connecting the electrode winding body to an external electrode interconnecting member such as an external resistor; a cylindrical can for accommodating the electrode winding body connected to the terminal plate; and a ring-shaped sealing member for closing an opening formed in the can; wherein the sealing member includes a vent part having a vent hole and integrally formed in the center of at least one side of the sealing member.

Abstract: A battery may have a foil battery pack with leads that are coupled to a printed circuit board. Battery protection structures formed from an insulating material such as plastic may be used to protect the foil battery pack. The foil battery pack may have a rectangular shape with front and rear faces surrounded by a rectangular peripheral edge. The battery protection structures may have a ring shape that surrounds the peripheral edge while leaving the front and rear faces exposed to minimize the size of the battery protection structures. An elastomeric material may be used to form the battery protection structures. The elastomeric material may allow the battery protection structures to stretch when the battery pack expands during use. Two shots of plastic may be incorporated into the battery protection structures to provide both puncture resistance and the ability to stretch during use.

Abstract: A stacked nonaqueous electrolyte battery, a method of manufacturing the battery, and a stacking apparatus for the battery are provided. The stacked nonaqueous electrolyte battery includes a plurality of electrode bodies alternately stacked, each of the electrode bodies including an anode and a cathode laminated through a separator. The separator has a raised edge portion leading along an edge portion of one of the anode and the cathode, and the raised edge portions of the plurality of the separators overlap one another.

Abstract: An electric storage device including a case, a positive electrode, a negative electrode, a current collector, a gasket, and a conductive member. The current collector has a first end connected to the positive electrode or the negative electrode and a second end electrically connected to an inner surface of the case. The conductive member includes a body and an inside large-diameter portion having a larger diameter than that of the body. The body is arranged in a mounting hole of the case. The inside large-diameter portion is disposed at one end of the body inside the case, and electrically connected to a second end of the current collector. The inside large-diameter portion is arranged so as to be in contact with an inner gasket such that the inner gasket and the second end of the current collector are sandwiched between the inside large-diameter portion and the case.

Abstract: An object is to provide a battery with good durability, and a vehicle and a battery-mounting device each having such a battery mounted therein. A battery includes a positive electrode terminal member made of aluminum, a negative electrode terminal member made of copper, a positive electrode resin member made of an insulating resin, covering a part of the terminal member in tight contact therewith, and a negative resin member made of an insulating resin, covering a part of the terminal member in tight contact therewith. A positive electrode resin adhesion surface and a negative electrode resin adhesion surface each have been subjected to a surface treatment. A negative electrode sealing length of a shortest path of negative seal paths is longer than a positive electrode sealing length of a shortest path of positive electrode seal paths.

Abstract: A lithium ion battery pack battery pack is disclosed. The battery pack comprises a housing, the housing having a sidewall and a sidewall opening extending there through, a plurality of lithium ion battery cells disposed within the housing, the battery cells having an anode terminal and a cathode terminal, first and second current collectors disposed in the housing, the first and second current collectors electrically engaging respective ones of the anode and the cathode terminals, a metal plate disposed in the sidewall opening adjacent one of the current collectors, and an electrically non-conductive barrier disposed between the adjacent one of the current collectors and the metal plate, wherein the metal plate draws heat from the adjacent one of the current collectors outwardly into the ambient environment.

Abstract: A cylindrical battery gasket that will not functionally deteriorate in absorbing stress caused by the gasket extending radially upon the battery being sealed is provided with a boss part with a central hole through which a negative electrode collector is inserted, a canister contact part that is affixed in place and in contact with a cathode canister, a disk-shaped part that is provided to connect the boss part to the canister contact part, and a stress buffering part that is provided on the way to the disk-shaped pat. The stress buffering part has a first bent part and a second bent part, both of an acute angle, and is set nearer the center of the cathode canister than to the positive electrode mixture, upon the gasket being installed in the cathode canister.

Abstract: A sealed battery with an electrode assembly and electrolyte enclosed in a battery case is provided, where a connection member can be attached to the battery case without requiring large space while avoiding increasing the length of the lead wire. The sealed battery includes: a battery case enclosing an electrode assembly and electrolyte, for serving as a terminal of one polarity of the electrode assembly; an external terminal provided on the battery case in such a way that it is electrically insulated from the battery case, for serving as a terminal of another polarity of the electrode assembly; and a sealant member for sealing a fill port for the electrolyte provided side by side with the external terminal on the battery case. A connection member to which a lead wire is to be connected is provided on the battery case to cover at least part of the sealant member.

Abstract: A secondary battery includes a can having an opening at a side thereof, an electrode assembly inside the can, the electrode assembly including a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode, a one-unit cap covering the opening of the can, the one-unit cap including a current interrupt unit, a cap-up on the current interrupt unit, a positive temperature coefficient (PTC) device between the current interrupt unit and the cap-up, and an adhesive unit attaching the current interrupt unit to the cap-up to integrate the current interrupt unit, the PTC device, and the cap-up with each other, and an insulating gasket sealing a space between the can and the one-unit cap to seal the can.

Abstract: A battery includes: a first member having an opening a housing space which houses a generation element; and a second member which closes the opening of the first member. The first member and the second member have welded portions which are welded to each other. A groove which can receive a part of molten metal MM generated upon welding is formed in a channel between the first and the second member, i.e., from the welded portion to the housing space. This prevents flow of the molten metal generation upon welding to the housing space. A vehicle using the battery and a method for manufacturing such a battery are also provided.

Abstract: A power supply includes rectangular battery cells 1. Each cell 1 includes a rectangular container 11 covered with an electrically insulating film 2. The film 2 has a bottom cover 22, main covers 21, and side covers 23. The bottom cover 22 is arranged between the main covers 21. The side covers 23 protrude from the both sides of the main and bottom covers 21 and 22. Each side cover 23 has first and second side covers 23A and 23B. The first and second side covers 23A and 23B protrude from the side edges of the main and bottom covers 21 and 22. The first and second side covers 23A and 23B are continuously arranged in connection areas 24. When folded on side surfaces 11D of the container 11, the first and second side covers 23A and 23B are superposed on one another. The superposed parts 25 are welded.

Abstract: A secondary battery includes an electrode assembly and an electrolyte solution in a case, a current collection unit in the case and electrically connected to the electrode assembly, a cap plate coupled to an open side of the case for sealing the case, an electrode terminal penetrating the cap plate through a terminal hole to be exposed to an exterior of the case, the electrode terminal being electrically connected to the current collection unit, and an insulation unit separating the cap plate from the electrode terminal and the current collection unit, the insulation unit being configured to block penetration of the electrolyte solution therethrough toward the cap plate.

Abstract: A first current collector on the first surface of the substrate and a second current collector having a first surface and a perimeter. One of the first and second current collector is an anode current collector and the other is a cathode current collector. The battery also comprises a cathode material having a perimeter, the cathode material being located on the cathode current collector; an electrolyte layer having a perimeter, the electrolyte separating the cathode material from the anode current collector; an insulation layer having a perimeter, the insulation layer together with the electrolyte layer separating the anode current collector from the cathode material and the cathode current collector.

Abstract: A battery including: a battery case having a bottom, a side wall, and an upper opening; an electrode assembly; an electrolyte; and a sealing plate covering the upper opening of the battery case accommodating the electrode assembly and the electrolyte, the electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, a gasket is interposed between an opening-edge portion of the battery case and the sealing plate, a first resistive layer is disposed between the opening-edge portion of the battery case and the gasket, or a second resistive layer is disposed between the sealing plate and the gasket. The first or second resistive layer contains a mixture of a particulate inorganic oxide and a binder. This configuration makes it possible to prevent a short circuit between the battery case and the sealing plate even when the gasket is broken.

Abstract: A compact, robust, multifunctional and highly manufacturable rechargeable battery cell is provided. The cell design dedicates minimal internal volume to inert components of the cell. This is accomplished, in part, by providing multiple functionalities to individual cell components.

Abstract: A polymer battery pack includes a core pack having a protective circuit module attached to a bare cell, a case having the core pack coupled thereto, the protective circuit module having a portion exposed to an exterior of the case, and a resin enclosing at least a portion of the protective circuit module that is exposed to the exterior of the case. A method of manufacturing a polymer battery pack includes forming a bare cell, forming a core pack having a protective circuit module, coupling the core pack to an interior of the case such that the protective circuit module is exposed to an exterior of the case, and molding the protective circuit module with a resin such that a terminal on the protective circuit module is exposed to an exterior of the resin.

Abstract: A rechargeable battery including an electrode assembly, the electrode assembly including a separator interposed between a first electrode and a second electrode; a case, the case accommodating the electrode assembly; a cap plate, the cap plate sealing an opening at one end of the case; and electrode terminals, the electrode terminals being electrically connected to the electrode assembly, wherein at least one of the electrode terminals is integrally formed with the cap plate.

Abstract: A battery packet (50) comprises a battery case (51) formed by processing a battery case forming laminated sheet (10), a battery 50a contained in the battery case (51), and tabs (59, 60) extending outside from the battery case (51). The battery case forming laminated sheet (10) is formed by laminating a first base film layer (1a), i.e., an outermost layer, a metal foil layer (2), and a heat-adhesive resin layer (3) in that order. The first base film layer (1a) is a biaxially oriented polyethylene terephthalate resin film or a biaxially oriented nylon resin film. The metal foil layer (2) is an aluminum or copper foil. The heat-adhesive resin layer (3) is formed of a polyolefin resin, more preferably, of an acid-denatured polyolefin resin.

Abstract: A polymer battery pack includes a core pack having a protective circuit module attached to a bare cell, a case having the core pack coupled thereto, the protective circuit module having a portion exposed to an exterior of the case, and a resin enclosing at least a portion of the protective circuit module that is exposed to the exterior of the case. A method of manufacturing a polymer battery pack includes forming a bare cell, forming a core pack having a protective circuit module, coupling the core pack to an interior of the case such that the protective circuit module is exposed to an exterior of the case, and molding the protective circuit module with a resin such that a terminal on the protective circuit module is exposed to an exterior of the resin.

Abstract: A sealed battery includes: a battery container having in at least an end portion thereof an opening portion, and a container folded-back portion formed in a peripheral edge of the opening portion; a lid having in its outer periphery a lid folded-back portion, and being attached to the opening portion of the battery container; a junction portion in which the container folded-back portion and the lid folded-back portion are integrally joined by a double-rolled seam method; a first seal member closing a first gap between a distal end portion of the container folded-back portion clamping a distal end portion of the lid folded-back portion and an inside of a folded curve portion of the lid folded-back portion; and a second seal member closing a second gap between the distal end portion of the lid folded-back portion and an inside of a folded curve portion of the container folded-back portion.

Abstract: A nonaqueous electrolyte secondary battery includes: a positive electrode 4; a negative electrode 6; a separator 5; and a battery case 1 in which an electrode plate group 7 including the positive electrode 4 and the negative electrode 6 spirally wound or stacked with the separator 5 interposed therebetween is stored with an electrolyte. In the nonaqueous electrolyte secondary battery, after charging, when the separator 5 is removed to bring a surface of the positive electrode mixture layer and a surface of the negative electrode mixture layer in contact with each other, terminals are respectively provided on the positive electrode current collector and the negative electrode current collector and a resistance value between the terminals is measured, the resistance value is 1.6 ?·cm2 or more, and the battery case 1 is electrically insulated from the positive electrode 4 and the negative electrode 6.

Abstract: A cylindrical rechargeable battery having an insulating gasket prevents an internal short circuit between a cylindrical can and a cap assembly generated by external factors. The cylindrical rechargeable battery includes an electrode assembly; a cylindrical can which has one open side and receives the electrode assembly through the open side, and is electrically connected to the received electrode assembly; and an insulating gasket which is connected to the inner surface of the open side of the cylindrical can and includes a bent cover part; and a cap assembly which seals the open side of the cylindrical can and is electrically insulated from the cylindrical can by the insulating gasket, and is electrically connected to the electrode assembly. The cover part covers an outer surface of the open side of the cylindrical can.

Abstract: A secondary battery includes an electrode assembly and a can having an opening at one end of the can. The electrode assembly is housed in the can. A cap plate seals the opening. The cap plate includes an electrolyte injection hole. An electrode terminal is coupled to the cap plate electrical connecting the electrode terminal and the electrode assembly. A gasket is located between the electrode terminal and the cap plate to insulate the electrode terminal from the cap plate. A plug seals the electrolyte injection hole, the plug being coated with an elastic film.

Abstract: Disclosed herein is a cylindrical secondary battery constructed in a structure in which a crimping region, at which a cap assembly is mounted to the open upper end of a cylindrical container having an electrode assembly mounted therein, is formed at the upper end of the container, wherein the crimping region is constructed in a structure in which the upper end of the crimping region is gently bent at a predetermined radius of curvature (R), such that the crimping region surrounds a gasket located at the inside of the crimping region, the bent front end extends inward, such that the bent end presses the gasket, and an inclination of a predetermined angle is formed at the sidewall of the crimping region, such that the upper part of the crimping region is directed inward. According to the secondary battery of the present invention, the sealability of the gasket is improved, and external impacts are partially absorbed by the inclination formed at the crimping region.