A battery includes a negative electrode can that is formed into a topped cylindrical shape. A negative electrode can circumferential wall portion includes a double cylinder portion that extends from an opening edge of the negative electrode can toward a top portion, and a step portion that connects the top portion to the double cylinder portion. The step portion includes a first curved portion that extends to a lower side from an outer circumferential edge of the top portion, a second curved portion that extends to an outer side of a radial direction from the first curved portion, and a third curved portion that extends to the lower side from the second curved portion. The double cylinder portion includes an inner cylinder portion that extends to the lower side from the third curved portion, and an outer cylinder portion that surrounds the inner cylinder portion from the outer side of the radial direction. A gasket is arranged on an outer side of the outer cylinder portion in the radial direction and on an upper side. An upper end edge of the outer cylinder portion is positioned further on the upper side than a center between both ends of the negative electrode can in an axial direction and is positioned further on the lower side than an upper end edge of the third curved portion.

A gasket includes a base portion that extends across an entire circumference in a circumferential direction and is arranged between a bottom portion of a positive electrode can and an opening edge of a negative electrode can, an outer wall portion that protrudes to an upper side from an outer circumferential portion of the base portion and extends across the entire circumference in the circumferential direction, and is in close contact with an inner circumferential surface of the positive electrode can and an outer circumferential surface of the negative electrode can, and an inner wall portion that protrudes to the upper side from the base portion on an inner side of the outer wall portion and extends across the entire circumference in the circumferential direction. An inner circumferential surface of the outer wall portion includes a guide portion that extends in an axial direction with a constant inner diameter, and a sealant holding portion that is positioned between the guide portion and the base portion and holds a sealant having fluidity. An outer circumferential surface of the outer wall portion includes a tapered portion that extends across the entire circumference in the circumferential direction. A diameter of the tapered portion is gradually increased in a direction from a lower side to the upper side.

An electrochemical cell includes a cylindrical housing that encloses an interior space having a first end face and a second end face that are interconnected by an annular shell, and a positive and a negative electrode are arranged in the interior of the housing, wherein the negative electrode is electrically connected, either directly or via a separate conductor, to the first end face to constitute a negative pole, and the positive electrode is electrically connected, either directly or via a separate conductor, to the second end face to constitute a positive pole, and a contact lug is fastened to the first or second end face of the housing.

The present invention provides a charging device for a button/coin cell rechargeable lithium ion battery. A receiving inductor coil receives energy from a transmitting inductor coil which is passed to a wireless charging receiving circuit which is in electrical communication with the receiving inductor coil. The wireless charging receiving circuit communicates with a charging control circuit, a voltage regulation circuit, and a battery protection circuit in electrical communication with one another. The voltage regulation circuit includes a 1.8 V to 3.3 V constant voltage output regulator circuit to maintain a constant voltage output in loading currents ranging from approximately 10 μA to approximately 300 mA.

A miniature electrochemical cell of a primary or secondary chemistry with a total volume that is less than 0.5 cc is described. The cell has a casing comprising an annular sidewall supported on a lower plate opposite an upper lid. The lid has a sealed electrolyte fill port that is axially aligned with an annulus residing between the inner surface of the annular sidewall and the electrode assembly. The fill port axially aligned with the annulus between the electrode assembly and the casing sidewall allows the casing to be filled with electrolyte using a vacuum filling process so that activating electrolyte readily wets the anode and cathode active materials and the intermediate separator.

A rechargeable button cell including a housing half-parts comprising a housing cup and a housing top separated from one another by an electrically insulating seal or film seal is disclosed. The button cell includes an electrode-separator assembly within the housing having a positive and a negative electrode in the form of flat layers connected to one another by a porous plastic film separator. The electrodes each include a metallic film or mesh embedded in a respective electrode material as a current collector, which acts as an output conductor that connects the electrodes to one of the flat bottom or flat top areas of the housing.

The present disclosure discloses a button cell, and a method for welding electrode tabs to a pole shell of the button cell. The button cell includes the pole shell and an electric core. The pole shell consists of an anode shell and a cathode shell. The button cell further comprises at least one metal sheet. A cathode tab and/or an anode tab of the electric core is/are welded to the metal sheet, and the metal sheet is then welded to the cathode shell and/or the anode shell. The button cell manufactured by the invention has a complete surface, and can avoid phenomena such as electrolyte leakage and surface bulging caused by the rupture of the polar shell.

A method for producing a button cell includes providing a first metal housing part having a first housing plane region, providing a second metal housing part having a second housing plane region, and providing a cylindrical electrode winding having a first end side, a second end side, and an outer side. The electrode winding is formed from a multi-layer assembly wound in a spiral shape about an axis. The multi-layer assembly includes a positive electrode formed from a first current collector coated with a first electrode material, a negative electrode formed from a second current collector coated with a second electrode material, and a separator disposed between the positive electrode and the negative electrode. The method further includes placing the electrode winding into the first metal housing part and forming a cell housing by assembling together the first metal housing part and the second metal housing part.

A secondary battery according to the present invention comprises an electrode assembly in which an electrode and a separator are combined and staked, a can configured to accommodate the electrode assembly therein, and an insulation coating part applied to an inner surface of the can, wherein the insulation coating part has a coating thickness of 1 μm to 15 μm.

A button cell includes a button cell housing with a metal cell cup and a metal cell top. The metal cell cup has a cell cup plane region connected to a cell cup lateral surface region, and the metal cell top has a cell top plane region connected to a cell top lateral surface region. The cell cup plane region extends substantially parallel to the cell top plane region, the cell cup lateral surface region extends substantially parallel to and at least partially overlaps the cell top lateral surface region in an overlap area, an electrically insulating seal is disposed in the overlap area, and the cell cup lateral surface region and the cell top lateral surface region provide a force-fit connection therebetween to form a leaktight closure of the button cell housing. The button cell further includes an electrode winding disposed within the housing.