Abstract: The disclosure relates to the field of battery technology, and provides a cell, a battery and an electric device. At least one end of the cell is provided with a tab group. The tab group includes a plurality of layers of tabs arranged sequentially outward from the center of the cell, and each layer of the plurality of layers of tabs surround the center of the cell. Each layer of the plurality of layers of tabs includes a plurality of sub-tabs, a slit is provided between two adjacent sub-tabs in each layer of the plurality of layers of tabs, and the slits in two adjacent layers of the plurality of layers of tabs are misaligned, which is conducive to the flattening of the tabs and makes the tabs less likely to wrinkle, and in turn will not easily lead to poor welding between the tabs and the connecting member.

Abstract: The present invention discloses an electrode plate, a manufacturing method therefor and a battery. The manufacturing method for an electrode plate comprises: obtaining at least two active material films; stacking the at least two active material films, the fiberization directions of the two adjacent active material films being perpendicular to each other or forming an included angle, and applying a conductive glue between two adjacent active material films; rolling the stacked at least two active material films to obtain an electrode film; and combining the electrode film with a current collector to obtain the electrode plate. The manufacturing method of the present disclosure can improve the strength of the electrode film, and thus the electrode film is not prone to cracking. The included angle is formed between the fiberization directions of the two adjacent active material films, so that the electrode plate is prone to cracking are solved.

Abstract: A secondary battery, a battery module and an electrical device are provided. The secondary battery includes a top cover plate, cell assemblies, and insulators arranged between the top cover plate and the cell assemblies and configured to isolate the cell assemblies from the top cover plate. Each of the cell assemblies includes a cell body and tabs arranged on the cell body; the secondary battery includes electrode terminals, the electrode terminals pass through the top cover plate and the insulators and being connected to the tabs. Bottom ends of the electrode terminals extend along the bottom surfaces of the insulators to form extension parts. The extension parts are fixedly connected to the tabs. According to the disclosure, a connecting piece is omitted, and production parts and procedures are simplified, thereby facilitating reduction of the production cost.

Abstract: The present disclosure relates to the technical field of batteries, and discloses an electrode plate, a cell and a lithium battery. The electrode plate comprises a support layer, a conductive coating layer and an active material layer, wherein at least part of the area of the surface of at least one side of the support layer is coated with the conductive coating layer, and at least part of the area of the surface of a side of the conductive coating layer away from the support layer is covered with the active material layer. The electrode plate provided by the present disclosure has a high production efficiency, a low production difficulty and low production costs.

Abstract: The present disclosure belongs to the technical field of battery production and manufacturing, and specifically relates to a cylindrical battery and a battery module. The cylindrical battery includes: a housing, a cell and a top cover assembly. The housing is provided with an opening. The cell is arranged in the housing, the cell is provided with a first tab and a second tab opposite in polarity to the first tab, and the first tab and the second tab are both located on a same end face of the cell. The top cover assembly seals the opening and includes a cover, a first conductive portion and a second conductive portion. The cover, the first conductive portion and the second conductive portion are in insulating connection, the first conductive portion is connected with the first tab, and the second conductive portion is connected with the second tab.

Abstract: The disclosure relates to the technical field of battery production and manufacture, in particular to a cylindrical battery electrode plate including a electrode plate body and a plurality of tabs provided on one side of the electrode plate body, wherein a gap area is provided between adjacent tabs of the plurality of tabs, each of the plurality of tabs is respectively provided with one or more slits extending along a surface thereof, a starting end of each of the slits is provided at one end, away from the electrode plate body, the extending direction of each of the slits is arranged to form an included angle with the arrangement direction of the plurality of tabs, and each of the plurality of tabs is divided into a plurality of sub-tabs by the slits.

Abstract: Disclosed are a bare cell, a cylindrical battery and an assembly method of the bare cell. The bare cell is formed a cylinder by stacking and winding a first electrode plate, a separator and a second electrode plate, the polarity of the first electrode plate is opposite to the polarity of the second electrode plate, at least one of the first electrode plate and the second electrode plate forms a plurality of tabs at at least one end of the cylinder in an axial direction, each of the plurality of tabs is provided with at least one die-cutting line to form a plurality of sub-tabs, the plurality of tabs are bent and flattened in a radial direction, and the plurality of sub-tabs of two adjacent layers of the plurality of tabs are arranged in a staggered manner.