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 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.

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 method of making a reference electrode assembly for an electrochemical cell according to various aspects of the present disclosure includes providing a subassembly including a separator layer and a current collector layer coupled to the separator layer. The method further includes providing an electrode ink including an electroactive material, a binder, and a solvent. The method further includes creating a reference electrode precursor by applying an electroactive precursor layer to the current collector layer. The electroactive precursor layer covers greater than or equal to about 90% of a superficial surface area of a surface of the current collector layer. The electroactive precursor layer includes the electrode ink. The method further includes creating the reference electrode assembly by drying the electroactive precursor layer to remove at least a portion of the solvent, thereby forming an electroactive layer. The electroactive layer is solid and porous.

A button cell includes a packaging member and an electrode assembly. The packaging member includes an insulating wall, a first end cover, and a second end cover. The insulating wall is provided with a through accommodating cavity, and the first end cover and the second end cover are arranged at two ends of the accommodating cavity, respectively. The insulating wall is further provided with a first communication hole for communication between the accommodating cavity and an external environment of the packaging member. The electrode assembly is accommodated in the accommodating cavity and includes a first electrode plate and a second electrode. The packaging member further includes a first conductive terminal arranged at the first communication hole, which is electrically connected to the first electrode plate forming an outer tab of the button cell, and is arranged on a wall instead of an end cover.

A button cell includes a packaging member and an electrode assembly. The packaging member includes an insulating wall, a first end cover, and a second end cover. The insulating wall is provided with a through accommodating cavity, and the first end cover and the second end cover are arranged at two ends of the accommodating cavity, respectively. The insulating wall is further provided with a first communication hole for communication between the accommodating cavity and an external environment of the packaging member. The electrode assembly is accommodated in the accommodating cavity and includes a first electrode plate and a second electrode. The packaging member further includes a first conductive terminal arranged at the first communication hole, which is electrically connected to the first electrode plate forming an outer tab of the button cell, and is arranged on a wall instead of an end cover.

A cell, including an electrode assembly and a shell. The electrode assembly includes tabs, and the electrode assembly is disposed in the shell. The shell includes a packaging part and a sealing part connected to the packaging part, where the sealing part is formed by extending the packaging part outward, the electrode assembly is located in the packaging part, and the tabs penetrate out of the sealing part. The packaging part includes a side wall, where notches are provided in the sealing part, the notches are formed by recessing an exterior circumferential edge of the sealing part towards a joint of the sealing part and the packaging part, and the sealing part is attached to the side wall.

A cell, including an electrode assembly and a shell. The electrode assembly includes tabs, and the electrode assembly is disposed in the shell. The shell includes a packaging part and a sealing part connected to the packaging part, where the sealing part is formed by extending the packaging part outward, the electrode assembly is located in the packaging part, and the tabs penetrate out of the sealing part. The packaging part includes a side wall, where notches are provided in the sealing part, the notches are formed by recessing an exterior circumferential edge of the sealing part towards a joint of the sealing part and the packaging part, and the sealing part is attached to the side wall.

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, a separator located between the first electrode and the second electrode, a first electrode tab extended from the first electrode, and a second electrode tab extended from the second electrode; a case connected to the first electrode tab to accommodate the electrode assembly, and including an opening portion to expose the electrode assembly; a cap plate coupled with the case to cover an outer peripheral region of the opening portion and including a through-hole to expose a center region of the opening portion; and a terminal plate connected to the second electrode tab to be insulation-bonded to the cap plate, and including a flange part covering the through-hole and a protruding part passing through the through-hole from a center portion of the flange part.

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, a separator located between the first electrode and the second electrode, a first electrode tab extended from the first electrode, and a second electrode tab extended from the second electrode; a case connected to the first electrode tab to accommodate the electrode assembly, and including an opening portion to expose the electrode assembly; a cap plate coupled with the case to cover an outer peripheral region of the opening portion and including a through-hole to expose a center region of the opening portion; and a terminal plate connected to the second electrode tab to be insulation-bonded to the cap plate, and including a flange part covering the through-hole and a protruding part passing through the through-hole from a center portion of the flange part.