Abstract: A method for constructing a battery that includes a can, a jelly roll contained in the can, a top insulator contained in the can adjacent to and above the jelly roll, and a battery cap. The method includes forming the can, forming the jelly roll, inserting the jelly roll into the can, inserting a top insulator into the can adjacent to and above the jelly roll, assembling the battery cap, including an outer conductive ring, an insulator ring, a conductive top plate, a conductive rupture plate, connecting a cathode to the conductive rupture plate, inserting the battery cap into the can, and welding the battery cap to an inner surface of the can.

Abstract: A method for constructing a battery that includes a can, a jelly roll contained in the can, a top insulator contained in the can adjacent to and above the jelly roll, and a battery cap. The method includes forming the can, forming the jelly roll, inserting the jelly roll into the can, inserting a top insulator into the can adjacent to and above the jelly roll, assembling the battery cap, including an outer conductive ring, an insulator ring, a conductive top plate, a conductive rupture plate, connecting a cathode to the conductive rupture plate, inserting the battery cap into the can, and welding the battery cap to an inner surface of the can.

Abstract: A battery includes a can, a jelly roll contained in the can, a top insulator contained in the can adjacent to and above the jelly roll, and a battery cap. The battery cap is welded to an inner surface of the can adjacent to and above the top insulator and includes an outer conductive ring, an insulator ring, and a conductive top plate, wherein the outer conductive ring, the insulator ring, and the conductive top plate are crimped together. The battery cap further includes a conductive rupture plate electrically connected to the conductive top plate and a cathode electrically connected to the conductive rupture plate and extending into the jelly roll. The battery may further include an opening in a central portion of the conductive top plate and a central portion of the conductive rupture plate cover welded upon the opening in the central portion of the conductive top plate.

Abstract: A manufacturing method of a battery including attaching a first current collector lead to a first electrode plate; attaching a second current collector lead to a second electrode plate; a step of fabricating a wound electrode group by winding the first electrode plate and the second electrode plate around a winding core member with a separator interposed therebetween; accommodating the wound electrode group in a closed-end cylindrical metal case being a first electrode terminal; joining the first current collector lead to an inner sidewall surface of the metal case (step X); joining the second current collector lead to a sealing member being a second electrode terminal; and sealing the metal case, before step X, a joint portion of the first current collector lead with the inner sidewall surface of the metal case is curved in a same direction as a curve of the inner sidewall surface of the metal case.

Abstract: An electrochemical cell includes a can configured to serve as one electric contact of the electrochemical cell, the can containing active materials, a diaphragm configured to serve as an opposite electric contact of the electrochemical cell, and a gasket that is initially of generally cylindrical shape, the diaphragm positioned inside the gasket in an opening of the can wherein an outer edge of the can is crimped onto the gasket, the gasket having an inner periphery inside the can and an outer periphery outside the can, the outer periphery comprising leaves that after crimping extend along an outer surface of the diaphragm.

Abstract: A battery includes a first electrode plate, a second electrode plate, a separator interposed between the first and second electrode plates, a closed-end cylindrical metal case accommodating these three elements, and a sealing member sealing an opening of the metal case with an insulating member interposed therebetween. The first and second electrode plates are wound with the separator interposed therebetween to form a wound electrode group. A center axis portion of the wound electrode group is substantially the same as a center axis of a cylinder of the metal case, and contains no power-generating element. A first current collector lead coupled to the first electrode plate extends toward the opening of the metal case, and joined to an inner sidewall surface of the metal case. A second current collector lead coupled to the second electrode plate extends toward the opening of the metal case, and joined to the sealing member.

Abstract: A battery includes a can, a jelly roll contained in the can, a top insulator contained in the can adjacent to and above the jelly roll, and a battery cap. The battery cap is welded to an inner surface of the can adjacent to and above the top insulator and includes an outer conductive ring, an insulator ring, and a conductive top plate, wherein the outer conductive ring, the insulator ring, and the conductive top plate are crimped together. The battery cap further includes a conductive rupture plate electrically connected to the conductive top plate and a cathode electrically connected to the conductive rupture plate and extending into the jelly roll. The battery may further include an opening in a central portion of the conductive top plate and a central portion of the conductive rupture plate cover welded upon the opening in the central portion of the conductive top plate.

Abstract: An electrochemical cell includes: a cell can; electrolyte and an active-material roll in the cell can; and a cap that closes at least one opening of the cell can, the cap comprising: a substantially flat member that covers the opening, the substantially flat member having a separation portion defined therein; and a diaphragm that covers the separation portion on an inside of the substantially flat member.

Abstract: An electrochemical cell includes a can configured to serve as one electric contact of the electrochemical cell, the can containing active materials, a diaphragm configured to serve as an opposite electric contact of the electrochemical cell, and a gasket that is initially of generally cylindrical shape, the diaphragm positioned inside the gasket in an opening of the can wherein an outer edge of the can is crimped onto the gasket, the gasket having an inner periphery inside the can and an outer periphery outside the can, the outer periphery comprising leaves that after crimping extend along an outer surface of the diaphragm.

Abstract: Provided is a small-sized cylindrical battery in which improvement in battery characteristics and improvement in long-term reliability and safety are both realized. The cylindrical battery includes: a bottomed cylindrical battery case 1, an electrode group 5 housed together with an electrolyte in the battery case 1, a sealing member 8 fitted into an opening of the battery case 1, and a gasket 9 interposed between the sealing member 8 and the battery case 1. The opening of the battery case 1 is sealed by applying a drawing process to an opening end portion of the battery case 1. The battery case 1 is constituted of stainless steel. The battery case 1 has an outer diameter of 10 mm or less and a thickness of 0.05 mm or more and 0.2 mm or less.

Abstract: An electrochemical cell includes: a cell can; electrolyte and an active-material roll in the cell can; and a cap that closes at least one opening of the cell can, the cap comprising: a substantially flat member that covers the opening, the substantially flat member having a separation portion defined therein; and a diaphragm that covers the separation portion on an inside of the substantially flat member.

Abstract: Provided is a small-sized cylindrical battery in which improvement in battery characteristics and improvement in long-term reliability and safety are both realized. The cylindrical battery includes: a bottomed cylindrical battery case 1, an electrode group 5 housed together with an electrolyte in the battery case 1, a sealing member 8 fitted into an opening of the battery case 1, and a gasket 9 interposed between the sealing member 8 and the battery case 1. The opening of the battery case 1 is sealed by applying a drawing process to an opening end portion of the battery case 1. The battery case 1 is constituted of stainless steel. The battery case 1 has an outer diameter of 10 mm or less and a thickness of 0.05 mm or more and 0.2 mm or less.

Abstract: A battery includes a first electrode plate, a second electrode plate, a separator interposed between the first and second electrode plates, a closed-end cylindrical metal case accommodating these three elements, and a sealing member sealing an opening of the metal case with an insulating member interposed therebetween. The first and second electrode plates are wound with the separator interposed therebetween to form a wound electrode group. A center axis portion of the wound electrode group is substantially the same as a center axis of a cylinder of the metal case, and contains no power-generating element. A first current collector lead coupled to the first electrode plate extends toward the opening of the metal case, and joined to an inner sidewall surface of the metal case. A second current collector lead coupled to the second electrode plate extends toward the opening of the metal case, and joined to the sealing member.

Abstract: A battery 1 has a wound body 4 accommodated in a cylindrical battery case 2. The wound body 4 includes an electrode group 6 wound around a core 10. The electrode group 6 includes a negative electrode plate 20, a positive electrode plate 30, and a separator 40. The core 10 is made of a flexible linear conductor, and functions as a negative electrode lead.

Abstract: A gasket that provides sealing between an assembled sealing member and the opening of a battery case includes a high-strength layer inside thereof. The high-strength layer is formed by using a material having a higher strength than that of a gasket body. Examples of such a material include high-strength resins such as polyamide, polyimide and polyphenylene sulfide, and a ceramic. On the other hand, the gasket body is made of a material having a high level of sealing properties. With this configuration, even when extraneous metallic matter or the like is present in a sealed portion, it is possible to prevent both insulating properties and sealing properties of the sealed portion from being impaired.

Abstract: A circuit substrate (3) being electrically connected to a rechargeable battery (2) is arranged upon a sealing plate (23) with a gap therebetween and united with the rechargeable battery (2) by filling resin in the gap. A primary mold (11) formed by the resin is firmly retained by undercut portions formed in engaging protrusions (26). The engaging protrusions (26) may be formed by welding separate engaging members (126, 126a, 126b, 126c, 66, 68).

Abstract: A battery pack having a battery in which a battery case and a cap of a sealing plate sealing an open end of the battery case serve as connection electrodes of opposite polarities, a terminal unit including external connection terminals respectively connected to these connection electrodes and an insulating cover integrally formed therewith, the terminal unit covering at least one end of the battery case, and a resilient member interposed between one end of the battery case and the terminal unit in a compressed state. In the manufacturing method of this battery pack, the dimension between the terminal unit and the other end of the battery case is controlled when fixing the terminal unit with the battery case. The battery pack thus has a simple and low cost configuration and yet exhibits high reliability in terms of the connection state of the external connection terminals when set in a portable electronic device.

Abstract: A battery pack (10) includes: a battery (1); a circuit substrate (5) having a charge/discharge safety circuit and arranged on one end face (3) of the battery; and an end case (6) in which an external connection terminal (7) is set. In this battery pack, the circuit substrate (5) is arranged inside the end case (6), and the end case (6) is secured to the battery by screws (12) with a screw head (12a) extending through and engaging with the end case (6) at both ends and tips of the screw (12) being engaged into the end face (3) at both ends of the battery (1). This achieves a compact battery pack with a reduced connection resistance, while achieving both high reliability and productivity.

Abstract: A sealed battery in which an opening of a battery case is sealed with any one of a sealing member via an insulating gasket, and a sealing unit in which a sealing member is crimped inside a filter via an inner gasket. The sealed battery includes a sheet-like gasket placed upon the sealing member so that the battery case is tightly sealed with any one of a combination of the insulating gasket and the sheet-like gasket, and a combination of the insulating gasket, the sheet-like gasket, and the inner gasket, by crimping the opening of the battery case inwards. This secures sufficient space for the compressing while the crimp-sealing is achieved.

Abstract: A battery pack (10) includes: a battery (1); a circuit substrate (5) having a charge/discharge safety circuit and arranged on one end face (3) of the battery; and an end case (6) in which an external connection terminal (7) is set. In this battery pack, the circuit substrate (5) is arranged inside the end case (6), and the end case (6) is secured to the battery by screws (12) with a screw head (12a) extending through and engaging with the end case (6) at both ends and tips of the screw (12) being engaged into the end face (3) at both ends of the battery (1). This achieves a compact battery pack with a reduced connection resistance, while achieving both high reliability and productivity.