Abstract: A negative electrode plate, an electrode assembly, a battery, and an electric apparatus are described. A coating is provided at an edge of the negative electrode plate, and the coating includes a functional compound, the functional compound being able to react with sodium metal or lithium metal to produce gas.

Abstract: A separator, a battery including the separator, and an electric apparatus including the battery. The separator includes a separator substrate, and the separator substrate satisfies at least one of the following conditions: the separator substrate includes a reinforced fiber layer; and at least one side surface of the separator substrate has a reinforced coating layer.

Abstract: A separator has a positive electrode end and a negative electrode end in a thickness direction of the separator. The positive electrode end is provided with a plurality of first openings, the negative electrode end is provided with a plurality of second openings, and an aperture of the first opening is larger than an aperture of the second opening.

Abstract: A capsule includes two membranes arranged in the capsule and configured to partition an interior of the capsule into a plurality of independent accommodation cavities, and a plurality of fragile structures comprising a first fragile structure, a second fragile structure, and a third fragile structure. A packaging strength of the first fragile structure is greater than a packaging strength of the second fragile structure. The packaging strength of the second fragile structure is greater than a packaging strength of the third fragile structure.

Abstract: A positive electrode plate, a secondary battery, and an electric apparatus are described The positive electrode plate includes a positive electrode active material layer that includes a first positive electrode active material and a second positive electrode active material. The first positive electrode active material includes LiaNibCocM1dM2eOfR?g, where 0.75?a?1.2, 0<b<1, 0<c<1, 0<d<1, 0?e?0.2, 1?f?2.5, 0?g?1, f+g?3, and M1 is element Mn and/or element Al. The second positive electrode active material includes Li1+xM3nMn1?yA?yP1?zEzO4, where ?0.100?x?0.100, 0?n?1.1, 0.001?y?1, 0?z?0.100, and A? includes one or more elements of Zn, Al, Na, K, Mg, Mo, W, Ti, V, Zr, Fe, Ga, Sn, Sb, Nb, and Ge. The positive electrode plate satisfies: 0.001 ? n ( A ? ) n ( N ) + n ( Mn ) + n ( A ? ) ? R ? 0 .

Abstract: This application provides a positive electrode active material, a method for preparing a positive electrode active material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a first positive electrode active material and a second positive electrode active material. The first positive electrode active material includes a compound LiNibCodMneM?fO2, and the second positive electrode active material includes a core, a first coating layer enveloping the core, and a second coating layer enveloping the first coating layer, where the core includes a compound Li1+xMn1?yAyP1?zRzO4, the first coating layer includes pyrophosphate MaP2O7 and phosphate XnPO4, and the second coating layer includes carbon.

Abstract: The present application discloses a battery cell, a battery and a power consumption apparatus. The battery cell may include: a housing filled with an electrolyte inside; at least one core assembly arranged in the housing and at least one closed liquid bladder holding another electrolyte, the liquid bladder being arranged in the housing, and at least being provided corresponding to a side wall of the core assembly; at least one weakened structure being provided on the liquid bladder. Under a condition that a pressure in the liquid bladder reaches a threshold value, the another electrolyte in the liquid bladder may break through the weakened structure and flow out of the liquid bladder.

Abstract: The present application relates to a battery module, including a first-type battery cell and a second-type battery cell electrically connected at least in series, the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, the first-type battery cell includes N first battery cell(s), the second-type battery cell includes M second battery cell(s); the first battery cell includes a first negative electrode plate, the second battery cell includes a second negative electrode plate, a ratio of a conductivity of an electrolyte solution (25° C.) of the first battery cell to a coating mass per unit area of the first negative electrode plate is denoted as M1, and a ratio of a conductivity of an electrolyte solution (25° C.) of the second battery cell to a coating mass per unit area of the second negative electrode plate is denoted as M2, M1>M2, and 0.08?M1?11, 0.03?M2?4.62.

Abstract: This application provides a positive electrode plate, a secondary battery, and an electrical device. The positive electrode plate may be a positive electrode plate applicable to a jelly-roll cell, and includes a waist region close to a waist and an end region far away from the waist. The waist region includes a first positive electrode film, and the end region includes a second positive electrode film. The positive electrode plate may be a positive electrode plate applicable to a stacked type cell, and includes a center region close to a center and an edge region far away from the center. The center region includes a first positive electrode film, and the edge region includes a second positive electrode film.

Abstract: This application provides a positive electrode active material, a method for preparing a positive electrode active material, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a first positive electrode active material and a second positive electrode active material. The first positive electrode active material includes a compound LiNibCodMneM?fO2, and the second positive electrode active material includes a core, a first coating layer enveloping the core, and a second coating layer enveloping the first coating layer, where the core includes a compound Li1+xMn1?yAyP1?zRzO4, the first coating layer includes pyrophosphate MaP2O7 and phosphate XnPO4, and the second coating layer includes carbon.

Abstract: This application provides a positive electrode active material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material contains a first positive electrode active material and a second positive electrode active material. The first positive electrode active material contains a compound LiNigCodMneM?fO2. The second positive electrode active material includes a core, a first coating layer enveloping the core, a second coating layer enveloping the first coating layer, and a third coating layer enveloping the second coating layer. In this application, the mixed use of the first positive electrode active material and the second positive electrode active material increases cycling capacity retention rate of the secondary battery, prolongs cycle life of the secondary battery, and improves safety of the secondary battery.

Abstract: This application provides a battery, an apparatus, a preparation method of battery, and a preparation apparatus of battery. The battery includes a first battery cell, a second battery cell, and a first thermal insulation member. The second battery cell is disposed adjacent to the first battery cell, an energy density of the second battery cell is less than that of the first battery cell, and the first thermal insulation member is disposed between the first battery cell and the second battery cell.

Abstract: Provided are a positive electrode material and a preparation method thereof, a composite positive electrode material, a positive electrode plate, and a secondary battery. The positive electrode material includes: a core, a first shell layer, and a second shell layer. The first shell layer wraps around a surface of the core. The second shell layer wraps around a surface of the first shell layer. The core includes a lithium manganese iron phosphate material. The first shell layer includes a polyanionic positive electrode material. The polyanionic positive electrode material contains no manganese. The second shell layer includes a hydrophobic conductive material. When ensuring a relatively high energy density of the lithium manganese iron phosphate material, the positive electrode material improves the electrical conductivity of the lithium manganese iron phosphate material, alleviates the problem of hygroscopicity, and reduces manganese dissolution during cycling.

Abstract: This application provides a mixed positive electrode active material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack, and an electric apparatus. The positive electrode active material includes a first positive electrode active material and a second positive electrode active material, where the first positive electrode active material includes a compound LiNibCodMneMfO2, and the second positive electrode active material includes a compound LiaAxMn1-yByP1-zC2O4-nDn. In this application, with the first positive electrode active material and the second positive electrode active material mixed, the cycling capacity retention rate of the secondary battery is improved, the cycle life of the secondary battery is extended, and the safety of the secondary battery is improved.

Abstract: A battery includes a protective box provided with a guiding channel and a plurality of battery cells in the protective box. The plurality of battery cells include a first battery cell and a second battery cell adjacent to each other. The first battery cell includes a pressure relief end provided with a pressure relief mechanism. The pressure relief mechanism is configured to actuate release of internal pressure of the first battery cell in response to the internal pressure or an internal temperature of the first battery cell reaching a threshold. The guiding channel is configured to guide emissions released from the pressure relief mechanism. The pressure relief end of the first battery cell is staggered with one end of the second battery cell that is close to the pressure relief end, in a direction leaving the guiding channel.

Abstract: Embodiments of the present application provide a charging control method and a charging control apparatus of a lithium-ion battery. The charging control method includes: performing charging control on the lithium-ion battery for the ith time, so that a battery capacity value of the lithium-ion battery at a target charging cut-off voltage is 0.95C0 to 1.05C0, where C0 is a nominal capacity of the lithium-ion battery, and the target charging cut-off voltage is less than or equal to the nominal voltage of the lithium-ion battery. The charging control method and the charging control apparatus according to the embodiments of the present application are beneficial to keeping the quantity of active lithium unchanged, thereby achieving the effect of automatically supplementing the battery capacity along with aging.

Abstract: A battery includes a plurality of battery cells and a support member configured to support the plurality of battery cells. The support member includes a recess. One battery cell of the battery cells extends into and is supported in the recess.

Abstract: The application relates to a battery module, a manufacturing method and a manufacturing device thereof, a battery pack and a power consumption apparatus. The battery module includes a first-type battery cell and a second-type battery cell having different chemical systems and being electrically connected at least in series, where under the conditions of 25° C. and 100% state of charge (SOC), specific power density P2 of the second-type battery cell is higher than specific power density P1 of the first-type battery cell. Satisfying: 0.04?(r1/m)/(r2/n)?14, where, r1 and r2 are resistances per unit area of a positive electrode plate of the first-type battery cell and a positive electrode plate of the second-type battery cell respectively, and m and n are numbers of laminations of the positive electrode plate of the first-type battery cell and the positive electrode plate of the second-type battery cell.

Abstract: The present application provides a battery pack and a power consuming device. The battery pack includes a battery pack case; and first battery cells and second battery cells that are accommodated in the battery pack case, wherein compared with the second battery cells, the first battery cells are arranged at positions where heat exchange with surroundings is more likely to occur in the battery pack case. It is assumed that the first battery cells each have a capacity C1 and a direct-current impedance R1, wherein X1=C1*R1, the second battery cells each have a capacity C2 and a direct-current impedance R2, wherein X2=C2*R2, and X1 and X2 satisfy 1.1?X1/X2?2.0.

Abstract: A positive electrode active material includes a low-to-medium nickel ternary material and a high-lattice-volume-change positive electrode material. The low-to-medium nickel ternary material has a mass ratio W1?45% in the positive electrode active material. The high-lattice-volume-change positive electrode material satisfies: the thickness change rate of the positive electrode active substance layer is ?2.6%, and the thickness change rate is (H1?H2)/H1, where H1 is the fully discharged thickness of the positive electrode active substance layer, and H2 is the fully charged thickness of the positive electrode active substance layer.