An electrode assembly, a battery cell, a battery, and an electric device are provided. The electrode assembly includes two electrode sheets having opposite polarities and a separator used for separating the two electrode sheets, the two electrode sheets and the separator being wound in a winding…

A secondary battery is provided and including a wound body including a positive electrode and a negative electrode includes a positive electrode tab and a protective tape. The positive electrode tab includes a tab root portion disposed on a positive electrode current collector and a tab projecting…

An electrochemical apparatus includes a housing, an electrode assembly, a first conductive member and a second conductive member. The housing includes a first housing body and a second housing body. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator…

An electrode assembly includes: a first electrode; a second electrode; a separator that is disposed between the first electrode and the second electrode; a first electrode tab that is disposed on the first electrode; and a second electrode tab that is disposed on the second electrode. A first…

A secondary battery includes a first electrode assembly including a first electrode tab that includes a plurality of first uncoated portions, each of the first uncoated portions being bent in a first direction, a second electrode assembly stacked on the first electrode assembly in the first…

A method of manufacturing a power storage device includes: inserting an electrode assembly into a case main body; and after inserting the electrode assembly into the case main body, joining a first conductive member and a second conductive member, the first conductive member being electrically…

A battery cell, a battery, an electric device, and a method for preparing a battery cell are described. The battery cell includes: a housing having an opening; an end cap assembly for closing the opening; an electrode assembly accommodated inside the housing; and a receiving component accommodated…

Examples of battery cells, batteries, and electric devices are disclosed. An example battery cell includes an electrode assembly, a current collection member, a first output electrode, and a second output electrode. The electrode assembly includes a first tab and a second tab that have opposite…

An electrode plate, including a base portion and a tab. The base portion includes a first edge connected to the tab. The tab includes an extension portion and a connecting portion. The extension portion includes a first side edge and a second side edge. The connecting portion includes a third side…

An electrochemical apparatus, including a first housing, a first connector connected to the first housing, an electrode plate assembly, a first tab, and a second tab. A first electrode plate of the electrode plate assembly is located on a winding inner side. The first tab is connected to a first…

Disclosed are a tab welding structure and a battery. The tab welding structure includes a tab and a to-be-welded part, where the to-be-welded part is welded on the tab to form a connecting portion, a plurality of first welding mark structures that are concave in a thickness direction of the…

A battery cell includes a packaging bag, a first electrode plate, and a second electrode plate. A second portion of the packaging bag is recessed with respect to a first portion to form a first concave portion on an outer surface of the packaging bag. A second zone of the second electrode plate is…

Generally described, one or more aspects of the present disclosure relate to methods, systems, and devices related to forming an energy storage device with a wound sequentially flagged electrode including an electrode film disposed over a foil, wherein the foil includes a plurality of flags, a…

The present disclosure provides: a structure of a pouch type battery cell provided with electrode leads protruding from lengthwise ends thereof, respectively, wherein the pouch type battery cell includes a margin capable of extending the electrode leads by deforming as end portions of the electrode…

A power storage device includes an electrode assembly where a positive electrode plate and a negative electrode plate are wound with a separator interposed between the positive electrode and negative electrode plates; and a positive electrode current collector joined to the positive electrode plate…

A battery cell includes: an end cap assembly, including an electrode terminal; a housing, on which an opening is created, where the end cap assembly seals the opening; an electrode assembly, disposed in the housing, where the electrode assembly includes a tab; an adapter component, connected…

An electrode includes a body and a tab extending from the body. The tab includes a first cross-sectional area at a first location along a length of the tab, a second cross-sectional area at a second location along the length of the tab, and a third cross-sectional area at a third location along the…

A battery cell, a battery, an electrical apparatus, and an energy storage cabinet are disclosed. The battery cell includes a shell, multiple pole groups, and multiple electrode terminals. The shell has a wall portion, and the pole groups are received in the shell and arranged along a first…

A battery cell includes a housing (), a terminal () coupled to the housing (), an electrode assembly () positioned within the housing (), a conductor () including a first portion () coupled to the electrode assembly () and a second portion () coupled to the terminal (), and one or more fuses…

A battery cell and a battery module. The battery cell includes: a housing and an electrode assembly accommodated in the housing, where the electrode assembly includes a positive electrode sheet, a separator and a negative electrode sheet, which are arranged to be mutually stacked, the separator is…

A secondary battery includes: an electrode assembly including a plurality of electrode plates, each including an electrode tab bent toward a central area of the electrode assembly; a current collector welded to the bent electrode tabs; and a terminal electrically connected to the current collector.

A sub plate includes a first flat portion connectable to a current collector, a second flat portion having a step height difference with respect to the first flat portion, the second flat portion being connectable to an electrode assembly, and a first elastic portion connecting the first flat…

A secondary battery includes an electrode assembly including a first electrode, a separator, and a second electrode, a case accommodating the electrode assembly, the case being electrically connected to the second electrode, a cap assembly sealing an opening of the case, the cap assembly being…

A battery cell and a battery cell module and a method of forming batteries with improved electric resistance and uniform current density are provided. The battery cell includes a first and a second negative electrodes and a first and second positive electrodes, each having defined length and width…

A secondary battery includes a case, an electrode assembly inside the case, the electrode assembly including a first electrode and a second electrode, a first tab member connected to the first electrode, the first tab member extending from the electrode assembly, a cap assembly facing the electrode…

A secondary battery and a battery pack including the same are disclosed. A secondary battery includes a case, an electrode assembly in the case and including a first electrode and a second electrode, a first tab member connected to the first electrode and extending from the electrode assembly in a…

The present disclosure relates to a secondary battery and a battery pack to prevent a local degradation phenomenon. To this end, a secondary battery may include a case, an electrode assembly disposed inside the case and having a first electrode and a second electrode, a first tab member connected…

The present disclosure relates to a secondary battery, a secondary battery manufacturing method, and a battery pack, in which defects in bonding of an electrode can be prevented or substantially prevented and power efficiency is increased. To this end, the present disclosure provides a secondary…

A battery cell includes an electrode extraction portion configured to extract electric energy, and an electrode assembly comprising a main body and a tab. The tab includes a transition portion and a connection portion, with the connection portion bent relative to the transition portion. The…

A secondary battery includes a cylindrical case, an electrode assembly accommodated in the cylindrical case, and a cap plate electrically connected to the electrode assembly and configured to seal the cylindrical case, wherein the cap plate includes a first flat portion at a center thereof, a…