Abstract: A battery cell and an electric device comprising same. The battery cell comprises an electrode assembly, which comprises a positive electrode sheet and a separator, wherein the positive electrode sheet comprises a positive electrode current collector and a positive electrode membrane layer arranged on at least one surface of the positive electrode current collector, the positive electrode membrane layer comprises a positive electrode active material, the positive electrode active material comprises a layered lithium-containing transition metal oxide, and the volume distribution particle size Dv50 of the positive electrode active material is smaller than or equal to 6.5 ?m; and the separator comprises a porous substrate and a porous coating arranged on at least one surface of the porous substrate, and the porous coating comprises a fiber material and a granular filler. The electric device can make a battery have a high energy density, good low-temperature power performance and cycling performance.

Abstract: This disclosure pertains to the technical fields of batteries, and provides a battery cell, a battery, and an electric device. The electric device includes a battery, the battery includes a battery cell, and the battery cell includes a casing, an electrode assembly, an electrode terminal, an adapter, and an insulating member. The electrode assembly is disposed within the casing. The adapter is disposed within the casing and conductively connected to the electrode assembly and the electrode terminal. The insulating member is disposed within the casing and at least partially located between the adapter and the casing, and at least a portion of the insulating member is spaced apart from the adapter. Spacing at least the portion of the insulating member apart from the adapter can mitigate the problem that heat from the adapter being conducted to the insulating member causes failure of insulation performance of the insulating member.

Abstract: A battery cell includes an electrode assembly and an outer package. The electrode assembly includes a positive electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector. The positive electrode film layer includes a positive electrode active material. The positive electrode active material includes layered lithium-containing transition metal oxide in monocrystalline morphology. A length of the battery cell is denoted as a, and a width of the battery cell is denoted as b. a is greater than or equal to 180 mm, and a/b ranges from 2.0 to 10.5.

Abstract: This disclosure pertains to the technical fields of batteries, and provides a battery cell, a battery, and an electric device. The electric device includes a battery, the battery includes a battery cell, and the battery cell includes a casing, an electrode assembly, an electrode terminal, an adapter, and an insulating member. The electrode assembly is disposed within the casing. The adapter is disposed within the casing and conductively connected to the electrode assembly and the electrode terminal. The insulating member is disposed within the casing and at least partially located between the adapter and the casing, and at least a portion of the insulating member is spaced apart from the adapter. Spacing at least the portion of the insulating member apart from the adapter can mitigate the problem that heat from the adapter being conducted to the insulating member causes failure of insulation performance of the insulating member.

Abstract: A secondary battery. The secondary battery includes an electrode assembly, a housing, a top cover assembly, a current collecting member, and an insulation member. The electrode assembly is accommodated in the housing and includes a body portion and a first tab. The first tab extends from one end of the body portion in a transverse direction. The top cover assembly includes a top cover plate and a first electrode terminal disposed on the top cover plate. The top cover plate is connected to the housing, and the first electrode terminal is connected to the current collecting member. The insulation member is disposed between the body portion and the current collecting member. The insulation member includes a through gap. The first tab passes.

Abstract: The present application relates to a secondary battery, a manufacturing method therefor, and a device containing the secondary battery. A negative electrode plate of the secondary battery of the present application comprises a negative electrode current collector and a negative electrode film layer, wherein the negative electrode film layer comprises a first negative electrode film layer and a second negative electrode film layer, the first negative electrode film layer is arranged on at least one surface of the negative electrode current collector and comprises a first negative electrode active material, the second negative electrode film layer is arranged on the first negative electrode film layer and comprises a second negative electrode active material, the first negative electrode active material comprises artificial graphite, the second negative electrode active material comprises natural graphite, and the compacted density of the negative electrode film layer is less than or equal to 1.6 g/cm3.

Abstract: A secondary battery. The secondary battery includes an electrode assembly, a housing, a top cover assembly, a current collecting member, and an insulation member. The electrode assembly is accommodated in the housing and includes a body portion and a first tab. The first tab extends from one end of the body portion in a transverse direction. The top cover assembly includes a top cover plate and a first electrode terminal disposed on the top cover plate. The top cover plate is connected to the housing, and the first electrode terminal is connected to the current collecting member. The insulation member is disposed between the body portion and the current collecting member. The insulation member includes a through gap. The first tab passes.