Abstract: The present application relates to a battery cell, a battery, and an electric apparatus. The battery cell comprises a housing, an electrode assembly, and a temperature acquisition member. The housing comprises a plurality of walls that define a first chamber, and at least one wall has a second chamber formed therein. The electrode assembly is accommodated in the first chamber. The temperature acquisition member is accommodated in the second chamber. By arranging the temperature acquisition member in the second chamber, the temperature acquired by the temperature acquisition member is more approximate to the actual temperature of the electrode assembly, thereby instantly reflecting the temperature rise of the electrode assembly and reducing the probability of thermal runaway of the battery cell.

Abstract: Disclosed herein is a current collector, a secondary battery, an electrical device, and a method for preparing the current collector. The current collector includes a substrate. The substrate includes the porous material. The affinity material is disposed in pores of the porous material. The affinity material is configured to promote the deposition of metal ions in an electrolyte solution. The affinity material includes at least one of a carbon-based material, a non-metal oxide, a carbide, a fluoride, a nitride, a sulfide, a phosphide, and an organic material. The above manner is able to effectively reduce the nucleation overpotential of the metal ions on the porous material of the current collector, promote the uniform diffusion and deposition of the metal ions within the pores of the porous material of the current collector, inhibit the generation of a dendrite, and improve the cyclic performance and safety of the battery.

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: Embodiments of the present disclosure provide a spraying apparatus including a spraying region, a spraying body, a first processing device, and a second processing device. The spraying region is provided with to-be-sprayed object therein. The spraying body is configured to spray the to-be-sprayed object within the spraying region. The first processing device is in communication with the spraying region. The first processing device is configured to receive waste generated during spraying and perform a primary processing on the waste. The second processing device is disposed downstream the first processing device and configured to perform a re-processing on the waste subjected to the primary processing. With the first processing device and the second processing device, the waste generated during the spraying can be processed twice, which effectively increases processing effectiveness and noticeably reduces pollution of the waste, meeting emission requirements.

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 negative electrode plate including a three-dimensional porous current collector and an insulation layer attached to a side of the three-dimensional porous current collector, where the insulation layer extends from a surface to an interior of the three-dimensional porous current collector, and a thickness of the insulation layer is less than a thickness of the three-dimensional porous current collector is described. A preparation method of the corresponding negative electrode plate, a secondary battery, and an electric apparatus is also described. The negative electrode plate can effectively prevent the growth of lithium dendrites on a surface of the negative electrode plate and inhibit the volume swelling of the electrode, thereby improving the cycling performance and safety performance of the battery.

Abstract: Provided a separator, a preparation method therefor, a secondary battery and a power consuming device. The separator comprises a first substrate layer, a mixed material layer and a second substrate layer; the mixed material layer is provided between the first substrate layer and the second substrate layer; the mixed material layer comprises an inorganic material and a dispersant. The separator of the present application can delay the occurrence of lithium dendrites or sodium dendrites puncturing the separator and the occurrence of internal short circuit in the battery, prolong the service life of the battery, increase the infiltration of the separator to the electrolyte solution and the charge and discharge rate of the battery, improve the thermal shrinkage performance of the battery, and increase the safety and the first coulombic efficiency of the battery.

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 negative electrode plate, an electrode assembly, a battery cell, a battery, an electric device and a manufacturing method and device for the negative electrode plate are provided. The negative electrode plate includes a foam metal layer, a part of the foam metal layer is a filled region, pores of the filled region are filled with a filler, and the filler is configured to have a projection, in the thickness direction of the foam metal layer, at least partially overlapping with the projection of the coated region of the positive electrode plate.

Abstract: This application discloses a negative electrode plate, and a method for preparing same, and related devices. The negative electrode plate includes a current collector. The current collector is made of a foamed metal material. The current collector includes a first region, a second region, and a third region arranged sequentially along a first direction. An interior of the first region is provided with a negative active material. The second region is filled with an insulation material. The third region is provided with no negative active material. The technical solution hereof ensures that no metal particles are deposited in a tab region in a battery that uses foamed metal as a negative electrode, thereby avoiding a short circuit of a battery cell caused by dendrites arising from surplus metal particles deposited in the tab region, and in turn, enhancing safety performance of the battery.

Abstract: The present application provides a separator, including first base films sequentially arranged in a stacked manner, a coating containing ceramic particles, graphene oxide and a binder, and a second base film. The separator in the present application has good electrolyte solution wettability, may effectively inhibit the growth of lithium dendrites, and has a small resistance, which may effectively improve the safety, dynamic and cycling performance of a corresponding battery. The present application further provides a secondary battery, battery module, battery pack and electrical apparatus using the separator.

Abstract: This application discloses an electrode plate, an electrode assembly, a battery cell, a battery, an electrical device, and an electrode plate manufacturing method and equipment. The electrode plate includes a foamed metal layer. A part of the foamed metal layer is a filled region. Pores of the filled region are filled with a filler. The filler extends continuously from one edge to another edge of the foamed metal layer, the two edges being arranged on two opposite sides along a first preset direction. The first preset direction is perpendicular to a thickness direction of the foamed metal layer. In the electrode plate disclosed in this application, a part of the foamed metal layer is configured as a filling region filled with a filler.

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: A separator includes a first porous base film; a second porous base film; and a supporting layer arranged between the first porous base film and the second porous base film, wherein the supporting layer comprises a polydopamine material and inorganic particles dispersed in the polydopamine material, and has an elastic modulus ?5 Gpa.

Abstract: A separator includes a first porous base film; a second porous base film; and an intermediate layer arranged between the first porous base film and the second porous base film, wherein the intermediate layer comprises an inorganic phase and an organic phase into which the inorganic phase is embedded, the inorganic phase contains an inorganic particle, the organic phase connects the first porous base film with the second porous base film, and the organic phase contains a base film material and does not contain a binder.

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: Provided are a separator comprising a base film and a coating on the base film, wherein the coating comprises a ceramic layer partially embedded in the base film and a boehmite-like layer on the ceramic layer. The separator of the present application may effectively consume lithium dendrites, avoids the lithium dendrites from piercing the separator, and at the same time has a relatively low internal resistance. The present application further provides a method for preparing the separator, and a secondary battery, a battery module using the separator, a battery pack, and a power consuming device.

Abstract: The present application relates to a separator, comprising: two layers of substrate and a coating formed between the two layers of substrate, wherein the coating contains inorganic particles, and 30 wt % to 70 wt % of the inorganic particles have a surface coated with a coating layer, and 70 wt % to 30 wt % of the inorganic particles have an uncoated surface, based on the total weight of the inorganic particle. The separator may realize a high mechanical strength, a high wettability, and a good interfacial bonding, and may also effectively inhibit the growth of lithium dendrites, and thus improve the cycling performance of a secondary battery.