Abstract: The disclosure relates to the field of electrochemistry, and in particular to a lithium-ion secondary battery, a battery module, a battery pack, and a powered device. A lithium-ion secondary battery, includes a bare cell accommodating cavity in which a bare cell group including one or more bare cells A and one or more bare cells B is arranged, wherein the bare cell A includes a first positive electrode sheet including a first positive-electrode active material selected from a single crystal or single crystal-like low-nickel ternary positive electrode material A1, the bare cell B includes a second positive electrode sheet including a second positive-electrode active material and/or a third positive-electrode active material, the second positive-electrode active material is selected from a polycrystalline high-nickel ternary positive electrode material B1, and the third positive-electrode active material is selected from a polycrystalline low-nickel ternary positive electrode material B2.

Abstract: Battery cell and a device and a method for manufacturing the same, a battery, and a power consumption device are provided. The battery cell includes: a shell; an end cap patch; an end cap patch; an insulating film, including a main body portion and a flanging portion, wherein the flanging portion is provided between the end cap and the end cap patch; and a first glue layer, comprising a first portion and a second portion which are provided continuously. The first portion is provided around the second portion, and the first portion is provided between the flanging portion and the end cap patch. The first portion bonds the flanging portion and the end cap patch. The second portion is provided between the end cap and the end cap patch, and the second portion bonds the end cap and the end cap patch. The first portion is thinner than the second portion.

Abstract: Provided are a battery cell, a battery, a power consuming apparatus, and a method and apparatus for manufacturing the battery cell, relating to the technical field of batteries. The battery cell includes a housing, an electrode assembly, an end cap, an insulator and a thermally conductive member. The housing is provided with an opening. The electrode assembly is configured to be accommodated in the housing. The end cap is configured to cover the opening. The insulator is located on the side of the end cap facing the electrode assembly, and the insulator is configured to isolate the end cap from the electrode assembly. The thermally conductive member is embedded in the insulator, and the thermally conductive member is configured to be attached to the end cap. Heat generated by the electrode assembly may be transferred to the end cap through the thermally conductive member.

Abstract: An end cap, a battery cell, a battery and a power consuming device are described. The end cap includes a cap body and a pressure relief groove. The pressure relief groove is provided in the cap body, and the pressure relief groove defines a pressure relief zone. A length direction of the pressure relief zone is consistent with a width direction of the cap body. The end cap has a stress concentration region at a short edge of the pressure relief groove when the inner side of the end cap is subjected to the pressure inside the battery cell, and the end cap has a stress concentration region at a long edge of the pressure relief groove when the outer side of the end cap is subjected to an impact force.

Abstract: An end cap may comprise a cap body and a pressure relief groove. The cap body may be provided with a pressure relief portion, wherein the pressure relief groove may be formed in the cap body, and the pressure relief groove may delimit the pressure relief portion. The pressure relief portion may be bent in a thickness direction of the cap body.

Abstract: The present application provides an end cover assembly used for a battery cell. The end cover assembly includes: an end cover; a pressure relief mechanism arranged on the end cover and including a weak portion, the pressure relief mechanism being configured to rupture along the weak portion to release the pressure inside the battery cell when the pressure reaches a threshold; and an insulating member located on one side of the end cover facing an electrode assembly of the battery cell and including a base portion connected to the end cover and a guide portion arranged on the base portion communicating the space between the base portion and the pressure relief mechanism with the space on one side of the base portion facing away from the weak portion. In a thickness direction of the end cover, a projection of the guide portion does not overlap with a projection of the weak portion.

Abstract: A battery cell, a battery, an electrical device, and a method and device for manufacturing the battery cell. In some embodiments, the battery cell comprises a battery core, a shell, an end cover, and a first insulating component. The battery core comprises a main body part and electrode tabs protruding from the main body part. The shell has a first opening and is configured to accommodate the battery core. The end cover is configured to cover the first opening. The first insulating component comprises an insulating main body and an insulating part, wherein the insulating main body is located on a side, facing the electrode tabs, of the end cover, and the insulating main body is configured to isolate the battery core from the end cover.

Abstract: The disclosure relates to the field of electrochemistry, and in particular to a lithium-ion secondary battery, a battery module, a battery pack, and a powered device. A lithium-ion secondary battery, includes a bare cell accommodating cavity in which a bare cell group including one or more bare cells A and one or more bare cells B is arranged, wherein the bare cell A includes a first positive electrode sheet including a first positive-electrode active material selected from a single crystal or single crystal-like low-nickel ternary positive electrode material A1, the bare cell B includes a second positive electrode sheet including a second positive-electrode active material and/or a third positive-electrode active material, the second positive-electrode active material is selected from a polycrystalline high-nickel ternary positive electrode material B1, and the third positive-electrode active material is selected from a polycrystalline low-nickel ternary positive electrode material B2.

Abstract: The embodiments of this application provide a battery cell, a battery, an electrical device, and a battery cell manufacturing method and device, which pertains to the technical field of batteries. The battery cell includes an electrode assembly, a housing, an end cover assembly, and a support piece. The electrode assembly includes a main body and tabs. The housing has an opening and is used to accommodate the electrode assembly. The end cover assembly is used to cover the opening. The support piece is located between the main body and the end cover assembly, the tabs are bent around the support piece, and the support piece is configured to prevent the main body from moving along a direction facing the end cover assembly.

Abstract: The present disclosure discloses a primary lithium battery comprising a reactive solid cathode, a liquid electrolyte, a separator, and a lithium anode. The liquid electrolyte is ionic conductive and is configured to undergo a series coupling reaction after solid phase reaction of the reactive solid cathode and the lithium anode. The liquid electrolyte comprises a solvent and an electrolyte salt, and a concentration of the electrolyte salt in the liquid electrolyte is 0.1-3 mol/L. The solvent comprises a sulfite ester type compound and an organic solvent, and a concentration of the sulfite ester type compound in the organic solvent is 5 wt % to 90 wt %.

Abstract: The present disclosure discloses a primary lithium battery comprising a reactive solid cathode, a liquid electrolyte, a separator, and a lithium anode. The liquid electrolyte is ionic conductive and is configured to undergo a series coupling reaction after solid phase reaction of the reactive solid cathode and the lithium anode. The liquid electrolyte comprises a solvent and an electrolyte salt, and a concentration of the electrolyte salt in the liquid electrolyte is 0.1-3 mol/L. The solvent comprises a sulfite ester type compound and an organic solvent, and a concentration of the sulfite ester type compound in the organic solvent is 5 wt % to 90 wt %.