Abstract: An electrode assembly, a battery cell, a battery, and an electrical device are described. The battery cell includes a negative electrode plate and a positive electrode plate. The negative electrode plate includes a porous current collector and a first tab connected to at least one end of the porous current collector. The positive electrode plate includes a body portion and a second tab connected to at least one end of the body portion. The body portion and the porous current collector are stacked along a thickness direction of the porous current collector. Along a first direction, neither end of the porous current collector extends beyond the body portion. The first direction is perpendicular to the thickness direction of the porous current collector.

Abstract: A battery cell includes a positive electrode sheet, a negative electrode sheet and an insulation layer. The positive electrode sheet includes a coating layer. The negative electrode sheet includes a porous current collector and a first tab connected to at least one end of the porous current collector. Along a thickness direction of the porous current collector, the porous current collector and the coating layer are arranged facing each other, and along a first direction, the porous current collector has an extension section beyond the coating layer, where the first direction is perpendicular to the thickness direction of the porous current collector. The insulation layer is disposed corresponding to the extended section, and along the thickness direction of the porous current collector, the projection of the insulation layer on the porous current collector covers part or all of the extended section.

Abstract: The present application provides a composite separator, an electrochemical energy storage apparatus, and an electrical apparatus. The composite separator provided in a first aspect of the present application may comprise: a first base film and a second base film; and an anode protection layer located between the first base film and the second base film in a thickness direction of the composite separator, for capturing transition metal ions. The anode protection layer for capturing transition metal ions may be arranged between the first base film and the second base film to prevent the anode protection layer from falling off from an outer surface of the base films during prolonged use, so that the anode protection layer can have more stable anode protection effects in prolonged use of the electrochemical energy storage apparatus, and improve the application performance of the electrochemical energy storage apparatus.

Abstract: A conductive film includes: a substrate, where the substrate has a first surface and a second surface facing away from each other, and the substrate has a dense structure; and a first porous layer, where the first porous layer is stacked and bonded to the first surface of the substrate; the first porous layer includes a porous conductive material; and the porous conductive material has pores with first pore size and pores with second pore size; the first pore size being n micrometers, where 0.5?n?10; and the second pore size being m nanometers, where 20<m<200.

Abstract: A conductive film includes: a substrate, where the substrate has a first surface and a second surface facing away from each other, and the substrate has a dense structure; and a first porous layer, where the first porous layer is stacked and bonded to the first surface of the substrate; the first porous layer includes a porous conductive material; and the porous conductive material has pores with first pore size and pores with second pore size, the first pore size being n micrometers, where 0.5?n?10; and the second pore size being m nanometers, where 20<m<200.

Abstract: An electrode sheet, a battery cell, a battery, an electrical device, and a manufacturing method for the electrode are provided. The electrode sheet includes a porous current collector, the porous current collector includes a main body and an end portion which are integrally formed, the weight per unit volume of the end portion is larger than the weight per unit volume of the main body, the thickness of the end portion is smaller than the thickness of the main body, the thickness of the end portion is D1, satisfying 5 ?m?D1?100 ?m.

Abstract: This application provides a negative electrode plate and a method for preparing same. In the method, a metal foil is connected to a foamed metal current collector by roll welding, so as to form the negative electrode plate. The metal foil forms a tab of the negative electrode plate, and the foamed metal current collector includes a foamed metal layer of a porosity of 60% to 99%, and optionally 80% to 85%. The method reduces or avoids flying metal chips and cold solder joints, and improves mechanical strength and electrical conductivity of the electrode plate. This application also provides a negative electrode plate prepared by the method, a secondary battery containing the negative electrode plate, and an electrical device.

Abstract: This application provides a porous material and a preparation method thereof, a current collector, a secondary battery, and an apparatus. The porous material has pores of a first pore size and pores of a second pore size. The second pore size is m nanometers, and 10<m<400; and the first pore size is n micrometers, and 0.5?n?20. An apparent volume of the porous material is V, a total pore volume of the pores of the second pore size is V2, a total pore volume of the pores of the first pore size is V1, and the porous material satisfies the following relationships: (V1+V2)/V=20%?90%, V2/V=15%?70%, and V1/V=5%?70%.

Abstract: Provided are a battery cell, a battery, a power consumption device, and a manufacturing method for a battery cell. The battery cell includes a housing, a protective member, a cell, an elastic member, a first gas-permeable component and a second gas-permeable component. The protective member is mounted on an inner wall of the housing and separates an inner space of the housing into a first chamber and a second chamber, the cell is disposed in the first chamber, the elastic member is disposed in the second chamber and located between the housing and the protective member, the protective member is configured such that the elastic member is compressed with expansion of the cell and stretched with contraction of the cell.

Abstract: A battery unit includes an electrode assembly and a support component. The electrode assembly includes a positive electrode plate and a negative electrode plate that have opposite polarities, and a separator separating the positive electrode plate and the negative electrode plate. The electrode assembly is wound around an outer periphery of the support component. An outer peripheral wall surface of the support component includes a first arc surface and a second arc surface. A first end of the first arc surface is connected to a first end of the second arc surface, and a second end of the first arc surface is spaced apart from a second end of the second arc surface so as to form a step region on the outer peripheral wall surface. The step region is configured to accommodate at least part of the electrode assembly.

Abstract: The present application provides a composite separator, an electrochemical energy storage apparatus, and an electrical apparatus. The composite separator provided in a first aspect of the present application may comprise: a first base film and a second base film; and an anode protection layer located between the first base film and the second base film in a thickness direction of the composite separator, for capturing transition metal ions. The anode protection layer for capturing transition metal ions may be arranged between the first base film and the second base film to prevent the anode protection layer from falling off from an outer surface of the base films during prolonged use, so that the anode protection layer can have more stable anode protection effects in prolonged use of the electrochemical energy storage apparatus, and improve the application performance of the electrochemical energy storage apparatus.

Abstract: A current collector may comprise a strength enhancement layer and a current collecting layer, wherein the current collecting layer may be stacked and bonded with the strength enhancement layer, and the current collecting layer may comprise a foam metal portion and a solid metal portion.

Abstract: The present application provides a current collector and a preparation method therefor, a secondary battery, a battery module, a battery pack and a power consuming device. The current collector may comprise a strength enhancement layer and a current collecting layer. The current collecting layer may comprise a first foam metal layer that may be stacked and bonded with the strength enhancement layer and a second foam metal layer that may be provided on the side of the first foam metal layer away from the strength enhancement layer and may be stacked with the first foam metal layer, the second foam metal layer having a porosity greater than that of the first foam metal layer.

Abstract: This application provides a battery current collector and a preparation method thereof, a secondary battery, a battery module, a battery pack, and an electric apparatus. The battery current collector includes a foam metal layer (1) and a strength enhancement layer (2), where the strength enhancement layer (2) is a sheet-shaped metal layer, and the strength enhancement layer (2) and the foam metal layer (1) are stacked and metallurgically bonded, alleviating a problem of poor mechanical performance of current collectors in the related art. The strength enhancement layer (2) and the foam metal layer (1) are connected by metallurgical bonding, which helps ensure not only structural strength of the strength enhancement layer (2) and the foam metal layer (1), but also good conductivity between the strength enhancement layer (2) and the foam metal layer (1). Further, the manner of metallurgical bonding helps reduce production costs.

Abstract: A display panel and a display device are provided to better protect a metal connecting line area in a peripheral wiring region, improve the protection degree and prevent the wire breakage. The display panel includes a gate insulating layer (102) disposed on a gate metal layer (101); and a protective layer (103), a passivation layer (105) and an indium tin oxide (ITO) coating layer (107) disposed on the gate insulating layer in sequence. The display panel and the display device can increase the film thickness in the peripheral wiring region, and hence can protect the entire peripheral wiring region and particularly the metal connecting line area exposed outside a color filter panel and improve the protection degree.

Abstract: A display panel and a display device are provided to better protect a metal connecting line area in a peripheral wiring region, improve the protection degree and prevent the wire breakage. The display panel includes a gate insulating layer (102) disposed on a gate metal layer (101); and a protective layer (103), a passivation layer (105) and an indium tin oxide (ITO) coating layer (107) disposed on the gate insulating layer in sequence. The display panel and the display device can increase the film thickness in the peripheral wiring region, and hence can protect the entire peripheral wiring region and particularly the metal connecting line area exposed outside a color filter panel and improve the protection degree.