A button-type secondary battery of the present invention comprises: a first can having a first side surface extending vertically from a circumference of a first base surface; a second can having a second side surface extending vertically from a second base surface; and a gasket disposed between the first side surface and the second side surface when the first can and the second can are coupled to each other. The second base surface has a greater diameter than the first base surface, and the first can and the second can are coupled to each other with the first side surface inserted inside the second side surface. The first and second cans are fixed together by deforming the gasket so as to extend into a vent hole punched in the second side surface of the second can. A method for manufacturing the button-type secondary battery is also provided.

A coin-type secondary cell for soldering by reflow method includes a porous positive electrode, a porous negative electrode, a porous separator provided between the positive electrode and the negative electrode, an electrolytic solution with which the positive electrode, the negative electrode, and the separator are impregnated, and a cell case having an enclosed space in which the positive electrode, the negative electrode, the separator, and the electrolytic solution are housed. A value obtained by dividing the amount of the electrolytic solution by the sum of the amounts of voids in the positive electrode, the negative electrode, and the separator ranges from 1.025 to 2.4.

The present invention discloses a rechargeable button cell, which includes an anode shell, a cathode shell and a coiled electric core. The anode shell and the cathode shell define a receiving cavity in which the coiled electric core is located. A channel that extends in an axial direction of the rechargeable button cell is provided in the middle of the coiled electric core. An electrically conductive bar that extends on the cathode shell is located in the channel. An anode tab and a cathode tab of the coiled electric core are provided on the same side, which facilitates monitoring the conditions of the two tabs at the same time during the production and preventing the tabs from being damaged, thereby achieving good weldability and improving the assembling efficiency.

A rechargeable battery includes: an electrode assembly including first and second electrodes, a separator therebetween, first and second electrode tabs respectively connected to the first and second electrodes; a case accommodating the electrode assembly with the first electrode tab being connected thereto; and a cap assembly sealing an opening in the case. The cap assembly includes: a cap plate coupled to the case and covering the opening; and a terminal plate coupled to the cap plate. The terminal plate includes: a flange portion coupled to the cap plate and electrically insulated from the cap plate; and a tab connection portion protruding toward the electrode assembly from the flange portion, extending into a terminal opening in the cap plate, and being connected to the second electrode tab. An inner surface of the tab connection portion has a height difference with an inner surface of the cap plate.

A battery includes: a core cell including a first surface and a second surface which are opposite each other and on which first and second electrodes are respectively located, and a lateral surface connecting the first and second surfaces; an insulating sheet arranged on the first surface of the core cell and in which a conduction hole facing the first electrode is defined; and an electrode plate arranged on the insulating sheet and electrically connected to the first electrode through the conduction hole.

The invention relates to a button lithium ion battery, a preparation method thereof, and a method of producing a lithium ion cell composite flat sheet, wherein the button lithium ion battery comprises a battery housing, a cell accommodated in the battery housing and an electrolyte filled in the battery housing; the cell is formed by winding a composite flat sheet in which a first separator, a positive piece, a second separator and a negative piece are sequentially stacked and hot-laminated to form an integrated structure. The cell of the button lithium ion battery is formed by winding a composite flat sheet, so that winding efficiency can be improved, and misalignment can be avoided; moreover, chances of hand contact can be reduced, the influence of dust and water vapor can be avoided, and the quality of the lithium battery can be improved to the maximum extent.

A button cell includes a housing, the housing including a cell cup, the cell cup having a flat bottom area, a cell cup casing; an insulator; and an electrode-separator assembly winding disposed within the housing, the electrode-separator assembly winding including a multi-layer assembly that is wound in a spiral shape about an axis, the multi-layer assembly including a positive electrode formed from a first metallic film or mesh coated with a first electrode material, a negative electrode formed from a second metallic film or mesh coated with a second electrode material, and a separator disposed between the positive electrode and the negative electrode. The first metallic film or mesh is bent such that at least a portion extends out of the electrode-separator assembly winding and wherein at least a first part of the portion is not covered with the first electrode material.

A rechargeable button cell having a height-to-diameter ratio less than one, including two metal housing halves separated from one another by an electrically insulating seal or film seal forming a housing having a plane bottom region and a plane top region parallel thereto is disclosed. The housing contains an electrode separator assembly comprising a positive electrode and a negative electrode inside the housing, the electrode separator assembly being provided in the form of a winding, end sides of which face in a direction of the plane bottom region and the plane top region such that layers of the electrode separator assembly are oriented essentially orthogonally to the plane bottom region and plane top region.

A button cell includes a housing having a metal cell cup and a metal cell top. An electrode winding disposed within the housing is formed from a multi-layer assembly that is wound in a spiral shape about an axis, the multi-layer assembly including a positive electrode formed from a first current collector and a negative electrode formed from a second current collector. A separator is disposed between the electrodes. The first current collector includes a first end section bent so as to extend out of the electrode winding forming an uncoated first flat layer adjacent to the electrode winding. An insulator is positioned (i) between the first flat layer and the first end side of the electrode winding or (ii) between a second flat layer and a second end side of the electrode winding.

A button cell includes a housing having a metal cell cup having a cell cup plane region and a metal cell top having a cell top plane region. An electrode winding is disposed within the housing, the electrode winding having a first end side and a second end side, the electrode winding being formed from a multi-layer assembly wound in a spiral shape, the multi-layer assembly including a positive electrode formed from a current collector. A conductor is connected to the current collector, wherein the conductor at least partially lies flat between (i) the first end side of the electrode winding and (ii) a first of the cell cup plane region or the cell top plane region. The first conductor is welded to the first of the cell cup plane region or the cell top plane region. An insulator is positioned between the first conductor and the electrode winding.