An ultrasonic welding device according to an embodiment of the present disclosure comprises: an anvil that supports a welding target from below; and a welding horn disposed on the welding target and having a body, at least one pair of heads provided on one end of the body, and a plurality of…

A disclosed battery includes an electrode group formed by winding a first electrode and a second electrode with a separator interposed therebetween, and a first current collector plate having at least one welded portion welded to the first electrode. The first current collector plate has at least a…

A tab welding mechanism comprises a base platform, a support base, a tab pressing structure, and a welding assembly. The support base is provided on the base platform and is used for supporting and fixing a cell body of a battery cell; the tab pressing structure is provided on the base platform and…

In forming a joining portion, vibration is applied in a state in which a first protuberance (11) and a first region (21) face each other with a first electrode tab group (220) being interposed between the first protuberance (11) and the first region (21), the first protuberance (11) is in abutment…

A bipolar battery cell includes a stack including N current collectors, M anode electrodes, S separators, and C cathode electrodes, where N, M, S and C are integers greater than one. A first positioning member is arranged on one side of the stack and includes a first planar portion and a first slot…

A method includes electrically connecting a first battery cell to a second battery cell by joining a first tab terminal of the first battery cell to a second tab terminal of the second battery cell. The method further includes compressing the first tab terminal and the second tab terminal after the…

A method of manufacturing a power storage device includes: producing an electrode assembly having a first electrode tab group; and forming a joining portion at which first electrode tabs in the first electrode tab group are joined together by applying vibration to the first electrode tab group by a…

A secondary battery includes an electrode assembly including a base material tab, the base material tab protruding to one side of the electrode assembly, a case accommodating the electrode assembly, an electrode lead electrically connected to the base material tab, the electrode lead extending to…

A welding apparatus for welding single cells stacked together to define a conductive cell for the production of electrical energy storage devices, each single cell including at least one first electrode, a second electrode and at least one separator film interposed between the first and second…

In a power storage device, a welding portion at which a first conductive member and a second conductive member are welded is formed, an outer peripheral edge of a base portion includes a first portion located in a vicinity of the welding portion and a second portion other than the first portion…

The present disclosure provides a case for a secondary battery, a secondary battery including the case, and a method for manufacturing the secondary battery. A secondary battery may include an electrode assembly including a first electrode, a second electrode, and a separator positioned between the…

A battery cell, a method of welding electrode foils in a battery, and a method of forming a battery cell. The battery includes a foil stack. The foil stack includes a plurality of foil tabs each extending from a current collector and at least one internal terminal lead. The battery further includes…

A battery module includes a battery cell stack that is formed by stacking a plurality of battery cells along a first direction, an insulating cover that covers both end parts of the battery cell stack, a holding member that wraps both end parts of the battery cell stack adjacent to the insulating…

A method of manufacturing a lead tab for a secondary battery comprises the steps of: (a) providing heat of a predetermined temperature or higher to the lead tab having a processing pattern formed on each of top and bottom surfaces to form an oxide film on the surfaces on which the processing…

Vehicles, battery assemblies, and methods for fabricating batteries are provided. A method for fabricating a battery includes arranging a plurality of foils associated with a plurality of electrodes of a battery cell in a stack, wherein the stack has an outer side surface; locating a cap assembly…

In one exemplary embodiment, an electrode sheet is provided. The electrode sheet has a longitudinal direction and a lateral direction and constitutes an electrode of a secondary battery by being wound with the lateral direction as an axial direction. The electrode sheet includes a current collector…

A secondary battery includes an electrode assembly including a first electrode plate having at least one first electrode tab thereon, a second electrode plate having at least one second electrode tab thereon, and a separator between the first electrode plate and the second electrode plate, a…

A secondary battery includes an electrode assembly, a case in which the electrode assembly is accommodated, the case having one opening, a sub plate assembly that includes a sub plate coupled to the electrode assembly and a current collector coupled to the sub plate, and a cap assembly that is…

The present disclosure relates to a secondary battery and a battery pack including the same, and a secondary battery in which a connection member is firmly welded to a terminal, and a battery pack including the same, are provided. A secondary battery includes a case having an opening, an electrode…

A secondary battery includes: a case; an electrode assembly inside the case; a cap assembly sealing the case and including a first terminal and a second terminal; a first tab member extending from the electrode assembly in a first direction; a first sub-plate between the electrode assembly and the…

Disclosed is a secondary battery and a method for manufacturing the same. The secondary battery includes an electrode assembly including a plurality of electrode plates, and a plurality of conductors joined to the electrode assembly, in which each of the plurality of electrode plates includes a…

A secondary battery cell includes a battery cell receptacle and an electrode assembly having multiple electrodes with each of the electrodes including a cathode tab and an anode tab. The electrode assembly is at least partially enclosed within the battery cell receptacle. The secondary battery cell…

A negative electrode sheet, a secondary battery, a battery module, a battery pack, and an electric device. The negative electrode sheet includes an electrode sheet body, a tab, and a connecting member. The electrode sheet body includes a plurality of layers of carbon fibers. At least two of the…

An apparatus and method for welding electrode tabs protruding from an electrode assembly to each other which may include a guide part configured to gather the electrode tabs on a predetermined gathering area, a welding part configured to weld the electrode tabs gathered by the guide part, and a…

This disclosure provides an energy storage device, a welding method for an energy storage device, and an electricity-consumption device. The energy storage device includes an end cap, a housing, and a current collector arranged between the end cap and the housing. The current collector includes a…

A battery cell includes: a can with an electrode assembly received therein, in which the can has a bottom member, a sidewall member connected to the bottom member and extending upwardly therefrom in an axial direction, and a cap covering an open end of the can at an axial end opposite to the bottom…

An electrode plate includes a current collector. The current collector includes a conductive layer and an insulating layer. The conductive layer includes a tab portion. In thickness direction of the electrode plate, the conductive layer is provided at two opposite sides of the insulating layer. The…

The present disclosure relates to an energy storage device and an electrical equipment. The energy storage device includes a housing, a jellyroll, a connecting sheet, and a top cover. The jellyroll is provided with a tab, and the connecting sheet includes a side wing part. The energy storage device…

A secondary battery having weldability between a current collector plate and an electrode uncoated portion by increasing an absorption rate of a laser beam irradiated onto the current collector plate. The secondary battery includes an electrode assembly including a first electrode plate having a…

A battery cell includes a shell, an end cover, an electrode assembly, and a current collector component. The shell has an opening, and the inner surface of the shell is provided with a first limit part in a protruding manner. The end cover covers the opening. The electrode assembly and the end…