Abstract: The present application relates to the technical field of batteries, and discloses a battery and a power consuming device. The battery includes: a plurality of first battery cells and a plurality of second battery cells, at least one of the second battery cells being provided between any two of the first battery cells, and any one of the second battery cells being adjacent to at least one of the second battery cells; wherein the thermal stability of the second battery cell is higher than the thermal stability of the first battery cell. With the technical solution of the present application, the risk of the spread of thermal runaway of the battery can be reduced, and thus the safety of the battery can be enhanced.

Abstract: The present application provides a sodium-ion battery, a battery module, a battery pack, and an electrical device. The sodium-ion battery includes a positive electrode plate, a negative electrode plate, and a separator; the positive electrode plate includes a positive electrode current collector and a positive electrode active material layer arranged on at least one surface of the positive electrode current collector, the negative electrode plate includes a negative electrode current collector and a negative electrode active material layer arranged on at least one surface of the negative electrode current collector, and the separator is arranged between the positive electrode plate and the negative electrode plate; the positive electrode active material layer has a porosity denoted as ?, the negative electrode active material layer has a porosity denoted as ?, and the separator has a porosity denoted as ?, which satisfy 0?(???)/??1.5, and ???.

Abstract: A secondary battery comprises a positive electrode plate and a negative electrode plate. The positive electrode plate comprises a positive electrode current collector and a positive electrode active layer loaded on the surface of the positive electrode current collector, and the negative electrode plate comprises a negative electrode current collector and a negative electrode active layer loaded on the surface of the negative electrode current collector. The positive electrode active layer has a compacted density of A1 g/cm3 and a porosity of B1, and 1.8?A1/B1?12. The negative electrode active layer has a compacted density of A2 g/cm3 and a porosity of B2, and 1?A2/B2?8.

Abstract: Provided are an electric device, a battery, and a battery unit and a manufacturing method. The battery unit includes a housing, electrode terminals, multiple battery cells, and current collecting members. The electrode terminals are provided at the top of the housing. The multiple battery cells are accommodated within the housing. At least two of the battery cells have different heights, and the current collecting members are provided within an accommodation space formed by a main body of a shortest battery cell and the top of the housing. The battery includes the foregoing battery unit. The electric device includes the foregoing battery. The manufacturing method of the battery unit includes providing current collecting members within an accommodation space formed by a main body of a shortest battery cell and the top of the housing. The electric device, battery, and battery unit and manufacturing method thereof improve space utilization and energy density.

Abstract: A negative electrode plate includes a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector. The negative electrode film layer includes a middle coating region and edge coating regions located on two opposite sides of the middle coating region. Thickness A1 of the edge coating region in a fully-discharged state, thickness B1 of the edge coating region in a fully-charged state, thickness A2 of the middle coating region in the fully-discharged state, and thickness B2 of the middle coating region in the fully-charged state satisfy (B1?A1)/A1>(B2?A2)/A2.

Abstract: A battery cooling device includes a shell, a cooling channel arranged inside the shell and configured to allow flowing of cooling fluids and restrict flowing directions of the cooling fluids along the cooling channels, a cooling fluid flow regulation component arranged inside the shell and configured to be deformed from a first opening degree to a second opening degree when the temperature rises where the fluid flow at the first opening degree is less than the fluid flow at the second opening degree, and a regulation component deformation restriction component arranged inside the shell and configured to be deformed from a first configuration to a second configuration when the temperature rises.

Abstract: A positive electrode sheet includes a current collector, a resistance layer disposed on the current collector, and a positive electrode active material layer. The current collector includes a coating region and a non-coating region. The resistance layer includes a conductive agent and a first binder. The positive electrode active material layer includes a positive electrode active material, a conductive agent, and a second binder. A resistance of the resistance layer is greater than a resistance of the positive electrode active material layer. In a cross section of the positive electrode sheet, a projection of a part of the positive electrode active material layer on the current collector overlaps with a projection of the resistance layer on the current collector, and a projection of another part of the positive electrode active material layer on the current collector does not overlap with the projection of the resistance layer on the current collector.