A button-type battery including a package assembly and a cell assembly is provided. In actual application, as part of a sealing wall is recessed inwards in a direction to a battery reservoir so as to form a locking boss, as such, when a battery cover is being assembled, the locking boss is pressed against part of a sealing plastic ring so that the part of the sealing plastic ring is in tight contact with a sealing edge, and a battery cup can be locked to the battery cover by means of the locking boss, thereby preventing easy detachment of the battery cover from the battery cup to cause exposure of a rolled cell. The battery cover is applied with a strong locking force from the battery cup, greatly improving the safety of the button-type battery.

A button-type battery including a package assembly and a cell assembly is provided. In actual application, as part of a sealing wall is recessed inwards in a direction to a battery reservoir so as to form a locking boss, as such, when a battery cover is being assembled, the locking boss is pressed against part of a sealing plastic ring so that the part of the sealing plastic ring is in tight contact with a sealing edge, and a battery cup can be locked to the battery cover by means of the locking boss, thereby preventing easy detachment of the battery cover from the battery cup to cause exposure of a rolled cell. The battery cover is applied with a strong locking force from the battery cup, greatly improving the safety of the button-type battery.

Provided is a secondary battery including an electrode assembly and an exterior body that houses the electrode assembly. In the secondary battery, the exterior body is provided with a flat plate-shaped terminal joined to the exterior body with an insulating member interposed therebetween, the flat plate-shaped terminal includes a first terminal member and a second terminal member, the first terminal member and the second terminal member are formed from materials that have different linear expansion coefficients from each other, and the first terminal member and the second terminal member are stacked on each other such that the first terminal member is stacked on the second terminal member, and the flat plate-shaped terminal is disposed on the insulating member such that the second terminal member faces the insulating member.

An energy storage cell includes a housing comprising a metallic, tubular housing with a circular opening. The energy storage cell further includes an electrode-separator assembly winding having two terminal end faces and a wound jacket, the electrode-separator assembly comprising an anode, a cathode, and a separator. The energy storage cell additionally includes an at least partly metallic contact element in direct contact with and connected to current collector by welding. The contact element comprises a circular edge and closes the terminal circular opening of the tubular housing portion in a gas- and liquid-tight manner. The contact element is or comprises a metallic membrane electrically connected to a current collector. The metallic membrane is configured to, in response to a pressure in the housing exceeding a threshold, bend such that electrical contact between the contact element and the current collector is lost.

An energy storage cell includes a housing comprising a metallic, tubular housing with a circular opening. The energy storage cell further includes an electrode-separator assembly winding having two terminal end faces and a wound jacket, the electrode-separator assembly comprising an anode, a cathode, and a separator. The energy storage cell additionally includes an at least partly metallic contact element in direct contact with and connected to current collector by welding. The contact element comprises a circular edge and closes the terminal circular opening of the tubular housing portion in a gas- and liquid-tight manner. The contact element is or comprises a metallic membrane electrically connected to a current collector. The metallic membrane is configured to, in response to a pressure in the housing exceeding a threshold, bend such that electrical contact between the contact element and the current collector is lost.

A wound battery includes an electrode assembly in which a first electrode and a second electrode are wound together via a separator, the electrode assembly being accommodated in a battery case including a bottomed tube-shaped metallic can. The first electrode has a first uncoated region defined by an exposed portion of a first current collector sheet at an end of the first current collector sheet in the axial direction of winding. The first electrode includes a first current collector lead connected to the first uncoated region. The first uncoated region is disposed on the same side as the open end of the metallic can. The second electrode includes a second current collector lead connected thereto. The first and the second current collector leads extend toward the open end of the metallic can. At least a portion of the first uncoated region is covered with an insulating layer, and the insulating layer extends beyond an end face of the first uncoated region.

A battery pack includes a battery block including a battery cell, and a battery holder configured to accommodate the battery cell and having at least a first opening portion; a battery pack case configured to accommodate the battery block and having at least a second opening portion; a first sealant disposed at least between a first peripheral end face of a first terminal portion of the battery cell and the battery holder; and a second sealant disposed at least between a second peripheral end face of a second terminal portion of the battery cell and the battery holder, wherein the first sealant is fixed by the first peripheral end face of the first terminal portion and the battery holder, and the second sealant is fixed by the second peripheral end face of the second terminal portion and the battery holder.

A battery pack includes a battery block including a battery cell, and a battery holder configured to accommodate the battery cell and having at least a first opening portion; a battery pack case configured to accommodate the battery block and having at least a second opening portion; a first sealant disposed at least between a first peripheral end face of a first terminal portion of the battery cell and the battery holder; and a second sealant disposed at least between a second peripheral end face of a second terminal portion of the battery cell and the battery holder, wherein the first sealant is fixed by the first peripheral end face of the first terminal portion and the battery holder, and the second sealant is fixed by the second peripheral end face of the second terminal portion and the battery holder.

A method of manufacturing a battery, in particular a button battery, including a case, provided with a container and a cap, and a polymer gasket, in particular made of polypropylene, compressed and bonded between the container and the cap. The method successively includes a step of implanting a silicatised layer by tribochemical sand blasting on all or part of the surface of the gasket, a step of adding a layer of adhesive to the surface of the gasket including the silicatised layer and/or on all or part of the surface of the container and of the surface of the cap intended to be joined to the gasket, a step of assembling the case with the gasket positioned by compression and bonding with the layer of adhesive between the container and the cap.

A rechargeable lithium ion button cell includes a first metal conductor electrically connected to a positive electrode and a housing component, and a second metal conductor electrically connected to the positive electrode and another housing component, wherein the positive electrode and a negative electrode each include a strip-shaped current collector, at least one of the strip-shaped current collectors includes sections coated with an active electrode material and an uncoated section between two coated sections, and either the first or the second metal conductor is attached by welding to the uncoated section and one of planar bottom and planar top regions, thereby electrically connecting either the positive or negative electrode to the housing component.