Abstract: The present application provides a method and a device for charging a secondary battery, a computer storage medium and electronic equipment. The charging method includes steps of: sending first charge information to a charging source by a battery management system, the first charge information includes a first charge power; performing a constant-power charging on the secondary battery by the charging source according to the first charge power; sending a plurality of pulse discharge information to the charging source by the BMS when a battery status parameter reaches a first predetermined value, each pulse discharge information includes a discharge power and a discharge duration; and performing multiple constant-power pulse discharges on the secondary battery by the charging source according to the discharge power and the discharge duration in the plurality of pulse discharge information.

Abstract: This application provides a battery cell, a battery, an electric apparatus, and a manufacturing method and device of battery cell. The battery cell includes an end cover and a housing, the end cover and the housing forming an accommodating cavity; an electrode assembly accommodated in the accommodating cavity; an insulator configured to isolate the end cover from the electrode assembly; and a protective film fitting around outer circumference of the electrode assembly, the protective film and the insulator being fit together. The protective film and the insulator being fit together does not require hot-melt connection during assembly, thereby avoiding drawing in over-melting, falling off in under-melting, and the like of the protective film caused by hot-melt connection.

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 discloses a current collector, and manufacturing method and equipment thereof, and a current collector preform, wherein the current collector may include a porous foam metal part and solid metal part(s); the porous foam metal part may be uncompressed, and the porous foam metal part may include a first edge and a second edge oppositely distributed in a first direction, the first direction may be perpendicular to the thickness direction of the current collector; the first edge and/or the second edge may be connected with the solid metal part(s).

Abstract: Embodiments of the present application relate to the technical field of semiconductors, and provide a manufacturing method for an N-polar GaN transistor structure and a semiconductor structure. A Ga-polar epitaxial functional layer is formed by depositing, a supporting substrate is formed on the epitaxial functional layer by bonding, after the epitaxial structure is inverted, a structural substrate and a buffer layer are removed, and a source, a drain, and a gate are manufactured on the side of the exposed epitaxial functional layer away from the supporting substrate, to form an N-polar GaN transistor structure.

Abstract: A battery cell includes a case having an opening and an end cover configured to cover the opening. The end cover comprises an end cover body and a support body. The end cover body is configured to be welded and fixed to the case. The support body is disposed on a bottom surface of the end cover body and is disposed along an edge of the end cover body in a circumferential direction. The support body is configured to abut against an inner side surface of the case.

Abstract: A negative electrode plate may comprise a negative electrode current collector and a negative electrode film layer provided on at least one surface of the negative electrode current collector; the negative electrode film layer may comprise a first region and a second region along the width direction, the first region may not comprise a solid electrolyte, while the second region may comprise a solid electrolyte.

Abstract: Described are a battery cell, a battery and a device using a battery cell as a power source, wherein the battery cell comprises a case and an end cap, wherein the case is provided with an opening, the end cap is used for covering the opening and is in sealed connection with the case, one of the case or the end cap is provided with a notch, the other is provided with a protrusion, the protrusion is provided within the notch and matches the shape of the notch, and the end cap is fitted on the case by mating the protrusion with the notch. The end cap of the battery cell of the present application is fitted on the case by mating the protrusion with the notch, which can effectively reduce the metal scrapings generated by scratching between the end cap and the case from falling into the case.

Abstract: A method for preparing an electrolytic copper foil includes placing an anode and a cathode to be plated in a twin crystal growth agent containing electroplating solution in an electroplating tank, and, under conditions that the electroplating solution is provided with randomly alternating transitions of one or two of an ultrasonic wave at a frequency f11 and an ultrasonic wave at a frequency f12 and one or two of an ultrasonic wave at a frequency f21 and an ultrasonic wave at a frequency f22, performing direct current electroplating to obtain the electrolytic copper foil, wherein f11>40 kHz, 15 kHz<f12?40 kHz, 0 kHz<f21?15 kHz, and f22=0 kHz.

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: An electrode, a method for preparing the same, a battery, and an electrical apparatus are provided. The electrode comprises a current collector layer having a porous structure and being gas permeable; and an active material layer laminated on at least part of surface of the current collector layer and located outside pores of the porous structure.

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: An adhesive application apparatus and a battery production line are provided. The adhesive application apparatus includes an unwinding mechanism, a first winding mechanism, an adhesive application mechanism, and a second winding mechanism. The unwinding mechanism is configured to dispose and unwind the double-sided adhesive. The first winding mechanism is configured to peel off and wind the first release paper. The adhesive application mechanism and the winding mechanism jointly define a first path, where the first path is used to guide the adhesive strip to move forward. The adhesive application mechanism includes an adhesive application member disposed on a side of the first path, where the adhesive application member is configured to applies pressure from a side of the first path to the double-sided adhesive, so as to attach the adhesive strip on an object surface. The second winding mechanism is configured to peel off and wind the second release paper.

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: The present application relates to a battery cell, a battery and a power consuming device. The battery cell comprises an electrode assembly and a current collecting member. The electrode assembly comprises a main body portion and tabs extending from the main body portion. The current collecting members each comprises a guide section and a tab connecting section, the tab connecting section connected to a respective tab, the guide section located on the side of the main body portion from which the tab extends and connected to the tab connecting section, a fold is provided between the tab connecting section and the guide section and extends in a first direction, and the guide section comprises a first end and a second end opposite to each other in the first direction. The guide section is provided with a reinforcement portion extending from the first end to the second end.

Abstract: An insulation tape, a battery unit, a battery, a method and apparatus for preparing a battery unit, and a power consuming apparatus are provided. In some embodiments, the insulation tape includes a bottom surface coverage area, and a plurality of first side surface coverage areas and a plurality of second side surface coverage areas which are alternately arranged. Each of edges of the bottom surface coverage area is connected to one of the first side surface coverage areas or one of the second side surface coverage areas; each of the first side surface coverage areas includes a bottom covering portion and two side surface overlapping portions, a bottom edge of the bottom covering portion being connected to one of the edges of the bottom surface coverage area.

Abstract: This application provides a metal foil. The metal foil may include a first metal layer and a metal base layer that are stacked up. A roughness Rz of a surface that is of the metal base layer and that is oriented toward the first metal layer is ?1 ?m, a roughness Rz of a surface that is of the first metal layer and that is oriented back from the metal base layer is ?1 ?m, ?1 may be in a range of 1.8 to 2.9, and ?1 may be in a range of 1 to 1.4.

Abstract: The embodiments of the application provide an electrode assembly and a manufacturing method and manufacturing system therefor, a battery cell and a battery. The electrode assembly includes a positive pole piece and a negative pole piece, a positive active material layer of the positive pole piece and a negative active material layer of the negative pole piece are arranged oppositely, and an end of the negative active material layer extends beyond the positive active material layer. The negative active material layer includes a negative body portion and a negative edge portion, one end of the negative edge portion extends beyond the positive active material layer, and/or the positive active material layer includes a positive body portion and a positive edge portion. The electrode assembly of this structure can reduce a risk of lithium plating of the pole piece.

Abstract: Embodiments of the present application provide an insulating film and related devices. The insulating film is configured to wrap a battery assembly, the insulating film includes a bottom coverage area, N side coverage areas and N pairs of bonding areas; the bottom coverage area has N sides, the N side coverage areas are respectively connected to the bottom coverage area outside the N sides, and can be respectively bend toward the bottom coverage area along the N sides; each pair of the N pairs of bonding areas is located between two adjacent side coverage areas, and is connected to the two adjacent side coverage areas respectively; each pair of bonding areas is configured to make the bottom coverage area and the N sides coverage areas form a space wrapping the battery assembly by bonding surfaces on the same side of each pair of bonding areas.