Abstract: A cylindrical battery includes a case with an opening defined in an end thereof, and a conductive adhesive, a roll core, a current collector, an insulating element, and a cap sequentially disposed inside the case from bottom to top; the insulating element is sleeved on the current collector; the current collector is of a multi-petal structure, and is provided with a positioning structure respectively connected to the roll core and the cap; after being limited, petal elements of the current collector are welded with the roll core; a conductive handle of the current collector is welded with the cap; a roll groove is defined on an outside of the case; the roll groove is positioned outside a current collector body; and a bottom of the roll core is fixedly connected to the case through the conductive adhesive.

Abstract: A cylindrical battery includes a case, and a conductive elastomer, a roll core, a current collector, an insulating element, a cap assembly, and a liquid injection sealing pin sequentially arranged inside the case from bottom to top; a lower portion of the roll core is fixedly connected to the case via the conductive elastomer, an upper portion of the roll core is welded with the current collector, an upper portion of the current collector passes through the insulating element and is welded with the cap assembly, the insulating element is configured to prevent the cap assembly and the roll core from being short-circuited, and an upper portion of the cap assembly is sealed via the liquid injection sealing pin; and a necking and a flange are defined on an outside of the case, a conductive adhesive layer is arranged on an outside of the flange.

Abstract: A connection structure for connecting a tab of a cell with a cover board comprising a tab and a cover board is provided. An insulating spacer and an elastic conductive ring are provided at an end of the cell. The tab passes through an orifice of the insulting spacer and then is electrically connected with the elastic conductive ring which is electrically connected with the cover board. An elastic pressing disc may be further provided on the elastic conductive ring. The elastic conductive ring is electrically connected with the cover board via the elastic pressing disc. A staple may be further provided on the elastic pressing disc and the elastic conductive ring. The staple has a slot on one end for matching with an elastic hook provided on the insulating spacer.

Abstract: Provided is a secondary battery comprising a core (7), tabs (4) protruding from an end of the core (7), a tab lead-out device placed at the end of the core (7), and a cover plate (1). The tab lead-out device includes an insulating layer (6) adjacent to the end of the core (7) and a conductive layer (5) distant from the end of the core (7). The tabs (4) are electrically connected to the conductive layer (5). The conductive layer (5) is electrically connected to the cover plate (1). The secondary battery further comprises a connector and a pad (3) stacked between the conductive layer (5) of the tab lead-out device and the cover plate (1). The tabs (4) are compacted between the pad (3) and the conductive layer (5) of the tab lead-out device by the connector.

Abstract: A Li-ion power cell includes at least two winding cores produced by a winding process. Each of the winding cores has an anode tab and a cathode tab. The anode tabs and the cathode tabs of the respective winding cores are connected in parallel, respectively. The winding core is of cylindrical or diamond shape. The Li-ion power cell further includes a housing, an anode pole and a cathode pole which are disposed on the housing. The anode tabs of the respective winding cores are connected in parallel and then electrically connected to the anode pole, and the cathode tabs of the respective winding cores are connected in parallel and then electrically connected to the cathode pole.

Abstract: Provided is a secondary battery comprising a core (7), tabs (4) protruding from an end of the core (7), a tab lead-out device placed at the end of the core (7), and a cover plate (1). The tab lead-out device includes an insulating layer (6) adjacent to the end of the core (7) and a conductive layer (5) distant from the end of the core (7). The tabs (4) are electrically connected to the conductive layer (5). The conductive layer (5) is electrically connected to the cover plate (1). The secondary battery further comprises a connector and a pad (3) stacked between the conductive layer (5) of the tab lead-out device and the cover plate (1). The tabs (4) are compacted between the pad (3) and the conductive layer (5) of the tab lead-out device by the connector.

Abstract: A connection structure for connecting a tab of a cell with a cover board comprising a tab and a cover board is provided. An insulating spacer and an elastic conductive ring are provided at an end of the cell. The tab passes through an orifice of the insulting spacer and then is electrically connected with the elastic conductive ring which is electrically connected with the cover board. An elastic pressing disc may be further provided on the elastic conductive ring. The elastic conductive ring is electrically connected with the cover board via the elastic pressing disc. A staple may be further provided on the elastic pressing disc and the elastic conductive ring. The staple has a slot on one end for matching with an elastic hook provided on the insulating spacer.