Abstract: The present invention discloses a positive electrode sheet, an electrochemical device including the positive electrode sheet, and an electronic device. The positive electrode sheet of the present invention includes a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material includes a ternary positive electrode material containing boron, zirconium and aluminum; the positive electrode sheet satisfies an equation as follows: 11.0?[F101+(DFW/4.5)]×1.85±ln(M)?17.0; where F101 is a half-peak breadth of a diffraction peak of the positive electrode active material at a position of 36.6±1° in an XRD spectrum; DFW is a full width at half maximum of particle size volume distribution of the positive electrode active material; and M is a total mass proportion of the trace elements in the positive electrode active material.

Abstract: The present invention discloses a positive pole piece, an electrochemical device including the positive pole piece, and an electronic device, and falls within the technical field of batteries. The positive pole piece includes a positive current collector and a positive active material layer provided on at least one surface of the positive current collector. The positive active material layer includes a ternary positive active material. The positive pole piece satisfies the following relationship: 1.2?D/(R/5+P/2)?3.5. D is a particle size change rate of Dv50 before and after the positive active material is held for 30 seconds at a pressure of 35 KN, and Dv50 is a particle size corresponding to 50% of a volume cumulative distribution percentage of the positive active material. R is a roughness of the positive pole piece, and P is a porosity of the positive pole piece.

Abstract: The present invention discloses a negative plate, a secondary battery including the negative plate, and an electric device. The negative plate of the present invention comprises a negative current collector and an anode active material layer. The anode active material layer comprising an anode active material. The negative plate satisfies the following relationship: ?1.75?lg(WAl×WS/?)?1.05, 0.2?lg(WS×R)+0.15×R?2.5, where WAl and WS are mass fractions of aluminum and sulfur respectively; ? is a contact angle of the anode active material layer with a mixed solvent of ethylene carbonate and methyl ethyl carbonate; and R is an ion transport impedance of the negative plate. When the negative plate of the present invention is applied to the secondary battery, cracking of the negative plate during charging and discharging can be significantly reduced, thereby improving the cycle performance of the battery and also improving the capacity retention rate of the battery during low-temperature cycling.

Abstract: The present invention discloses a negative electrode sheet, a secondary battery including the negative electrode sheet, and an electric device, and belongs to the technical field of batteries. The negative electrode sheet of the present invention includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer includes an negative electrode active material, the negative electrode sheet satisfies an equation as follows: 0.15?(F×ps)/(?×100)?10, where F is a cohesive force of the negative electrode sheet, in the unit of N/m; ps is a particle size change rate of the negative electrode active material, in the unit of %; and ? is a compaction density of the negative electrode sheet, in the unit of g/cm3.

Abstract: A negative plate, a secondary battery and an electrical device, which fall within the technical field of batteries, wherein the negative plate includes a negative current collector and an anode active material layer provided on a surface of the negative current collector, the anode active material layer includes an anode active material, the anode active material includes graphite, and the negative plate satisfies the following relationship: a=ln(DFW)+10×ln(DV50)+?(La)+26.5, b=PD, a/45?b?0.05. By reasonably controlling a particle diameter distribution of the anode active material in the negative plate, as well as a crystal size and a compacted density of the negative plate, the negative plate of the present disclosure maintains good wettability at a higher compacted density and has good liquid absorption capacity for an electrolyte solution, and a battery containing the negative plate has excellent cycle life.

Abstract: The disclosure discloses a negative electrode sheet, a secondary battery and an electrical device, belonging to the technical field of batteries. The negative electrode sheet of the disclosure includes a negative electrode current collector and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector, in which the negative electrode active material layer includes a negative electrode active material, the negative electrode active material includes graphite, and the negative electrode sheet satisfies an equation as follows: 1.0×10?3?(|La1?La2|/Lax)/(VOI×DV50)?3.0×10?3.

Abstract: An energy storage container and an assembly method thereof are provided. The energy storage container includes a container body, an air duct, and an air guide. The container body is provided with at least one battery rack. The air duct is arranged on a top portion of the battery rack. The air guide communicates with the air duct and the battery rack. The air guide includes a first connecting portion, a flexible air guide portion, and a second connecting portion. The first connecting portion is connected to the air duct, the second connecting portion is connected to the battery rack, and the flexible air guide portion is connected to both the first connecting portion and the second connecting portion.

Abstract: The disclosure relates to the technical field of batteries, and in particular to a battery pack and an electrical device. The battery pack includes: a plurality of battery cells, any of which is provided with a fragile portion; and a spray pipeline, which is arranged on one side of the battery cell where the fragile portion is arranged. The spray pipeline is provided with an injection portion, and the injection portion abuts against the fragile portion. The fragile portion is impacted by a thermal runaway heat flow of the battery cell to form a pressure relief port, and the injection portion forms an injection port under the action of the thermal runaway heat flow, so that the cooling medium in the spray pipeline flows out from the injection port.

Abstract: The disclosure relates to the technical field of batteries, and provides a battery pack, including: a battery box body; a pressure relief structure, which is disposed on the battery box body; a first battery assembly, which includes a plurality of first single cells arranged along a first direction, and the first battery assembly is arranged in the battery box body; a reinforcement member, which is disposed in the battery box body, and is located between the battery box body and the first battery assembly, the reinforcement member is provided with a gas guiding channel, the gas guiding channel includes a first opening, and the orthographic projection of the first opening facing a surface of the battery box body provided with a pressure relief structure coincides with at least part of the pressure relief structure, such that gas discharged from the first opening is in contact with the pressure relief structure.

Abstract: The disclosure relates to the technical field of batteries and provides a cylindrical battery including a winding cell. The winding cell includes a winding cell body and a first tab extending from one side of the winding cell body. The winding cell body is wound to form a central hole. In a radial direction of the central hole, the first tab includes a plurality of single tabs, and the plurality of single tabs form a first region. Herein, heights of the plurality of single tabs in the first region gradually increase. A difference value between a maximum height difference value and a minimum height difference value between adjacent single tabs in the radial direction of the central hole is less than or equal to 0.5 mm. The height of each of the single tabs is a dimension of the single tab in a lead-out direction thereof.

Abstract: The disclosure relates to the technical field of batteries, and a cylindrical battery is provided, including a wound core, and the wound core includes: a wound core body; a first tab portion, which extends from one side of the wound core body, the wound core body is formed with a wound core hole, the first tab portion includes a first tab set and a second tab set adjacent to each other, the first tab set includes at least two first tabs, and the second tab set includes a second tab; a first gap is formed between adjacent first tabs, and the orthographic projections of the second tab and the first gap on the same plane at least partially overlap each other along the radial direction of the wound core hole.

Abstract: The disclosure relates to the technical field of batteries, and a cylindrical battery is provided, including: a single cell housing structure; a core, which is arranged in the single cell housing structure, and the core includes a core body, a first tab and a second tab, and the first tab and the second tab arranged at intervals extend out from the same end of the core body, and the core body is formed with a winding center; the first tab and the second tab are arranged along the circumferential direction of the winding center, and the length of the first tab is greater than the length of the second tab along the radial direction of the winding center. A certain distance may be set between the first tab and the second tab on basis that the first tab and the second tab are able to have sufficient current-passing capability.

Abstract: The disclosure relates to the technical field of batteries and provides a cylindrical battery including a winding cell. One end of the winding cell is provided with a first tab and a center of the winding cell is formed with a central hole. The first tab includes a first tab layer and a second tab layer disposed adjacent to each other, the first tab layer includes a first single tab, the second tab layer includes at least two second single tabs, a number of the second single tabs of the second tab layer is one more than a number of the first single tab of the first tab layer.

Abstract: A battery box and a battery pack are provided. The battery box includes a bottom plate and a side wall. The side wall and the bottom plate enclose a space for accommodating a battery and/or an electrical component. The battery box further includes a lifting column integrally formed with the side wall and a fixed sealing block sleeved on the lifting column. The bottom plate is located between the side wall and the fixed sealing block. The side wall is fixedly connected to the bottom plate through the fixed sealing block. A first sealing member for sealing a gap between the fixed sealing block and the bottom plate is arranged between the fixed sealing block and the bottom plate. The fixed sealing block is sealingly connected to the lifting column.

Abstract: A battery cover plate assembly, a battery, and a manufacturing method of a battery cover plate assembly are provided. The battery cover plate assembly includes: a cover plate provided with a first connection portion and an insulating piece disposed on one side of the cover plate. The insulating piece is provided with a second connection portion, and the first connection portion is connected to the second connection portion. One of the first connection portion and the second connection portion is a mounting hole and the other one is a protrusion, and the protrusion is in an interference fit with the mounting hole. An area of an opening of the mounting hole is less than a maximum area of a cross section of the mounting hole, and the protrusion is inserted into the mounting hole through the opening of the mounting hole.

Abstract: The disclosure relates to the technical field of batteries, and in particular, relates to a battery apparatus, and the battery apparatus includes a battery pack. The battery pack includes a plurality of batteries arranged in a first direction, terminal components of the batteries are located on other surfaces of the batteries except the top surfaces, and an insulating film is provided on a top portion of the battery pack.