Provided are an electronic device and a manufacturing method therefor. The electronic device includes a first housing, a second housing, a cover plate, and a cell. The first housing includes a bottom plate and a first enclosure wall annularly disposed on a side of the bottom plate. The second housing includes a top plate and a second enclosure wall annularly disposed on a side of the top plate. The second enclosure wall is sleeved on an outer side wall of the first enclosure wall. The top plate is provided with an exit hole. The cover plate plugs the exit hole. One of a positive tab or a negative tab of the cell is connected to a part of the cover plate facing the exit hole. The other one of the positive tab or the negative tab is sandwiched between the first enclosure wall and the second enclosure wall.

A secondary battery includes: a case having an accommodating space therein; an electrode assembly accommodated in the case and having an uncoated portion on one end thereof; a current collector plate electrically connected to the uncoated portion of the electrode assembly; a cap plate sealing the case; and an electrode terminal outside the cap plate and electrically connected to the current collector plate. The current collector plate has a hole through which the electrode terminal passes and a coupling protrusion protruding toward the electrode assembly along a periphery of the hole.

A secondary battery includes: a case having an accommodating space therein; an electrode assembly accommodated in the case and having an uncoated portion on one end thereof; a current collector plate electrically connected to the uncoated portion of the electrode assembly; a cap plate sealing the case; and an electrode terminal outside the cap plate and electrically connected to the current collector plate. The current collector plate has a hole through which the electrode terminal passes and a coupling protrusion protruding toward the electrode assembly along a periphery of the hole.

A battery cell, a method and system for manufacturing the battery cell, a battery, and a power consuming device are provided. The battery cell comprises: an electrode assembly comprising a first tab, wherein the first tab is arranged around a central axis of the electrode assembly; a housing configured to accommodate the electrode assembly, wherein the housing comprises a barrel and a cover connected to the barrel, the barrel is arranged around a periphery of the electrode assembly, the cover is provided with an electrode lead-out hole, the central axis extends in a first direction and passes through the electrode lead-out hole, the first tab comprises a first annular portion, and a projection of the first annular portion in the first direction does not overlap with a projection of the electrode lead-out hole in the first direction; and an electrode terminal comprising a columnar portion.

A battery cell, a method and system for manufacturing the battery cell, a battery, and a power consuming device are provided. The battery cell comprises: an electrode assembly comprising a first tab, wherein the first tab is arranged around a central axis of the electrode assembly; a housing configured to accommodate the electrode assembly, wherein the housing comprises a barrel and a cover connected to the barrel, the barrel is arranged around a periphery of the electrode assembly, the cover is provided with an electrode lead-out hole, the central axis extends in a first direction and passes through the electrode lead-out hole, the first tab comprises a first annular portion, and a projection of the first annular portion in the first direction does not overlap with a projection of the electrode lead-out hole in the first direction; and an electrode terminal comprising a columnar portion.

Disclosed are a wound electrode assembly, and a method and manufacturing apparatus for manufacturing the wound electrode assembly. The wound electrode assembly includes an electrode sheet. The electrode sheet includes a winding ending section, the winding ending section is provided with a plurality of first tabs, the plurality of first tabs are laminated, and among the two adjacent first tabs, a width of the first tab close to a winding center of the wound electrode assembly is greater than a width of the first tab away from the winding center. Among the two adjacent first tabs, a width of the first tab close to the winding center is greater than a width of the first tab away from the winding center. After the winding ending section is wound, the amount of misalignment between the two adjacent first tabs is reduced.

A method of manufacturing an electrode, the electrode including a coated portion coated with an electrode active material and an electrode tab protruding from the coated portion, the method including setting a region of the non-coated portion at a center of foil based on a longitudinal direction of the foil so that the region of the non-coated portion corresponds to a protruding length of the electrode tab, forming a pair of coated portions at two opposite sides of the non-coated portion by applying the electrode active material so that the pair of coated portions is symmetrically disposed at the two opposite sides based on the non-coated portion, and forming an electrode tab with a preset pattern by processing the non-coated portion by using a cutting unit.

A method of manufacturing an electrode, the electrode including a coated portion coated with an electrode active material and an electrode tab protruding from the coated portion, the method including setting a region of the non-coated portion at a center of foil based on a longitudinal direction of the foil so that the region of the non-coated portion corresponds to a protruding length of the electrode tab, forming a pair of coated portions at two opposite sides of the non-coated portion by applying the electrode active material so that the pair of coated portions is symmetrically disposed at the two opposite sides based on the non-coated portion, and forming an electrode tab with a preset pattern by processing the non-coated portion by using a cutting unit.

In one embodiment, a battery includes an exterior unit, an electrode group, an electrode terminal, tab bundles and a lead. The electrode group is housed in an interior cavity of the exterior unit, and the electrode terminal is exposed to an outside. Current collecting tabs are stacked in the thickness direction of the electrode group in each of the tab bundles having the same polarity. The tab bundles protrude from the electrode group to the same side in the length direction of the electrode group. The lead establishes an electric connection between the respective tab bundles and the electrode terminal. The tab bundles are bonded to the lead at positions deviated from one another in the thickness direction, and are mounted on the lead from the same side in the thickness direction.

The present application provides a secondary battery, which includes a first electrode assembly, a second electrode assembly, a case, and a top cap assembly. The top cap assembly includes a top cap plate and a first electrode terminal, the top cap plate is connected to the case, and the first electrode terminal is arranged on the top cap plate. The first electrode assembly includes a first body and first tabs extending from the first body, and the first tabs are multiple and stacked. The second electrode assembly includes a second body and second tabs extending from the second body, and the second tabs are multiple and stacked. An end of each of the second tabs that is away from the second body is a second end portion. Each of the first tabs includes a first connecting portion extending beyond the second end portion.