Abstract: Provided are a battery and an electric device, belonging to the field of battery technologies. The battery includes: a plurality of battery units, the plurality of battery units being arranged in a first direction; and a bundling assembly, the bundling assembly including a plurality of bundling members and first protective members; the plurality of bundling members being provided in correspondence with the plurality of battery units, and each of the bundling members being configured to bundle a corresponding battery unit; and each first protective member connecting two adjacent bundling members to limit deformation of the bundling members.

Abstract: A rolling apparatus includes a roller assembly and a power source. The roller assembly includes four rollers, where the four rollers (110a) are arranged side by side in pairs along a first direction and a second direction intersected with each other, and two rollers arranged side by side define a roll gap therebetween. The power source drives two rollers arranged diagonally to rotate in a same direction around their axes. Two roll gaps defined by one of the two rollers arranged diagonally and the two rollers arranged side by side therewith are used for rolling a first electrode plate twice, and two roll gaps defined by the other one of the two rollers arranged diagonally and the two rollers arranged side by side therewith are used for rolling a second electrode plate twice. In the rolling apparatus, the four rollers form strip moving routes.

Abstract: The present disclosure relates to the field of battery production device technologies, and more particularly, to an oven and a battery assembly line production device. The oven at least includes a first oven unit, a second oven unit, a third oven unit, and a fourth oven unit that are sequentially connected in series in a conveying direction of the electrode plate. Based on drying physical characteristics of the electrode plate, the first oven unit and the third oven unit are internally provided with air nozzles and infrared heaters for drying the electrode plate by hot air and infrared rays. The second oven unit and the fourth oven unit are internally provided with the air nozzles for drying the electrode plate by hot air.

Abstract: Disclosed are a pole piece labeling control method and device, electronic equipment, and a storage medium. The method includes: acquiring a pole piece image, including a pole piece mark hole image, of a target pole piece; determining a defect detection result according to the pole piece image; determining a first distance according to the pole piece mark hole image; determining a second distance according to the first distance; determining a labeling delay of the target pole piece according to the second distance; and controlling the labeling of the target pole piece according to the labeling delay and the defect detection result. The real-time position of the pole piece transferred on a compression roller is identified through the pole piece mark hole image, so that the accuracy of the labeling delay is improved, and the labeling position based on the labeling delay is more accurate.

Abstract: This disclosure relates to the electrochemical field, and in particular, to a positive electrode material and a preparation method and usage thereof. The positive electrode material of this disclosure includes a substrate, where a general formula of the substrate is LixNiyCozMkMepOrAm, where 0.95?x?1.05, 0.5?y?1, 0?z?1, 0?k?1, 0?p?0.1, 1?r?5.2, 0?m?2, m+r?2, M is selected from one or more of Mn and Al, Me is selected from one or more of Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, Sr, Sb, Y, W, and Nb, and A is selected from one or more of N, F, S, and Cl; and an oxygen defect level of the positive electrode material satisfies at least one of condition (1) or condition (2): (1) 1.77?OD1?1.90; or (2) 0.69?OD2?0.74.

Abstract: A battery cell includes a case, a first battery cell, and a second battery cell, the first battery cell being arranged inside the case, the first battery cell including a first main body part and a first electrode lead-out component extending from a first side of the first main body part, the second battery cell being arranged inside the case, and the second battery cell including a second main body part and a second electrode lead-out component extending from a second side of the second main body part, wherein the first side of the first main body part and the second side of the second main body part are adjacent and arranged oppositely, the first electrode lead-out component includes a first connection surface inclined with respect to the first direction, and the second electrode lead-out component includes a second connection surface inclined with respect to the first direction.

Abstract: Provided in the embodiment of the present application are an electrode assembly, a battery cell, a battery, and an electric apparatus. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separation assembly The separation assembly is configured to separate the positive electrode plate from the negative electrode plate. The separation assembly includes a substrate area and a reinforcing area connected to the substrate area. A thickness of the reinforcing area is greater than a thickness of the substrate area. At least part of the reinforcing area is located between the positive electrode plate and negative electrode plate adjacent to each other. The reinforcing area may be configured to correspond to a position where the negative electrode plate is prone to lithium precipitation.

Abstract: A strip diverting mechanism includes a negative pressure unit and an air discharge unit. The negative pressure unit and the air discharge unit are arranged opposite each other, and a gap through which a strip passes is formed between the negative pressure unit and the air discharge unit. The negative pressure unit is configured to provide a suction force to the strip and the air discharge unit is configured to provide a repulsive force to the strip, to prevent the strip from contacting the negative pressure unit and the air discharge unit.

Abstract: This application relates to a battery module and a battery pack. The battery module includes a binding member and battery cell assemblies arranged along a horizontal direction, the battery cell assembly including an upper-layer battery cell and a lower-layer battery cell that are stacked along a vertical direction, the upper-layer battery cell and the lower-layer battery cell interconnected and forming a joint; and the binding member covering the joint, located between two adjacent battery cell assemblies, and fixed to the battery cell assemblies. The battery module includes a binding member and a plurality of battery cell assemblies, and the battery cell assembly includes upper-layer and a lower-layer battery cells stacked along a vertical direction. A joint is formed between the upper-layer and lower-layer battery cells and covered by the joint fixed to the battery cell assemblies, swelling of the upper-layer and lower-layer battery cells at the joint is reduced.

Abstract: This application relates to a battery module and a battery pack. The battery module includes: a plurality of battery cells, configured to be connected in series, where after the battery module fails, the plurality of battery cells include a failed battery cell and at least one non-failed battery cell adjacent to the failed battery cell; and a first connecting piece, configured to connect the failed battery cell to the at least one non-failed battery cell, where the first connecting piece includes a first connecting portion and a conductive portion connected to the first connecting portion, the first connecting portion is configured to be electrically connected to an enclosure of the failed battery cell, and the conductive portion is configured to be electrically connected to the at least one non-failed battery cell, so as to restore the battery module to work.

Abstract: A battery box includes end plates, side plates, and welding members. One of the end plates is provided between two adjacent side plates. The end plates and the side plates are connected to one another to enclose a cavity of the battery box. The welding members are formed by bending an end portion of a side plate or an end portion of an end plate multiple times. The end portion of the side plate and the end portion of the end plate are configured to implement the connection of the side plates and the end plates to one another to enclose the cavity of the battery box. The welding members are configured to be welded to a corresponding side plate.

Abstract: A negative electrode plate for a secondary battery and a preparation method therefor, and a secondary battery comprising the negative electrode plate, a battery module, a battery pack, and a power consuming device are described. The composite lithium metal negative electrode plate of the present application comprises a current collector and an active substance layer coated on at least one surface of the current collector, wherein the active substance layer comprises an active substance and a lithiophilic material having a core-shell structure, and the core of the lithiophilic material contains a lithiophilic substance and the shell thereof is a carbon material.

Abstract: A battery cell appearance defect detection apparatus may comprise: a first detection assembly comprising a first image collector and a first light source, wherein the first light source emits first light, the first light forming a first included angle with a detection surface, and the first image collector collects a first image of the position on the battery cell irradiated by the first light; a second detection assembly comprising a second image collector and a second light source, wherein the second light source emits second light, the second light forming a second included angle with the detection surface, and the second image collector collects a second image of the position on the battery cell irradiated by the second light, with the second included angle being less than the first included angle; and a control assembly constructed to detect appearance defects of the battery cell.

Abstract: Embodiments of the present application provide a battery production system and a battery production method. The battery production system includes: a preheating apparatus, including a preheating cavity, a first delivery mechanism being arranged in the preheating cavity, and the preheating cavity having a first charging door and a first discharging door; and a baking apparatus, including a baking cavity, the baking cavity having a second charging door and a second discharging door, wherein the first delivery mechanism is configured to deliver a battery piece in the preheating cavity to the baking cavity through the first discharging door and the second charging door when the first discharging door and the second charging door are opposite and are both opened.

Abstract: An electrode plate supporting device may be used in coordination with the laser assembly and may include a body constructed with an abutting surface for abutting against an electrode plate to tension the electrode plate. The laser assembly may be configured to emit laser to the abutting surface. During laser cutting, the electrode plate may abut against the abutting surface and closely fits the abutting surface to extend fully and thus may be in a flattened state, and therefore, the problem of defocusing caused by a wavy edge may be solved. Moreover, supported by the abutting surface, the electrode plate may be tensioned and not prone to shaking, and therefore, problems such as failing to cut off the incoming material due to easy shaking of the electrode plate may be effectively solved.

Abstract: A load access detection method, a switch circuit, and a battery management system, relating to the field of circuit technology. The load access detection method includes: detecting a voltage at a first detection point; detecting a voltage at a second detection point; if a voltage difference between the voltage at the first detection point and the voltage at the second detection point is less than or equal to a preset voltage threshold, controlling a switch circuit to enter a pre-charging mode, and pre-charging a load capacitor in the load circuit through the battery pack, where a charging current of the switch circuit in the pre-charging mode is less than a charging current of the switch circuit in a charging mode.

Abstract: The present application relates to a battery module and a battery pack, the battery module including a battery cell arrangement structure, bus bars and a fixing plate, where the battery cell arrangement structure includes a plurality of battery cells; the plurality of battery cells are electrically connected by means of a plurality of the bus bars to form a first output electrode of the battery module and a second output electrode of the battery module, and the first output electrode of the battery module and the second output electrode of the battery module are arranged at a same end of the battery module along a horizontal direction; the fixing plate is provided with an insulating portion, and at least a part of the insulating portion is located between the first output electrode of the battery module and the second output electrode of the battery module.

Abstract: The embodiments of this application provide a battery cell, a battery, an electrical device, and a battery cell manufacturing method and device, which pertains to the technical field of batteries. The battery cell includes an electrode assembly, a housing, an end cover assembly, and a support piece. The electrode assembly includes a main body and tabs. The housing has an opening and is used to accommodate the electrode assembly. The end cover assembly is used to cover the opening. The support piece is located between the main body and the end cover assembly, the tabs are bent around the support piece, and the support piece is configured to prevent the main body from moving along a direction facing the end cover assembly.

Abstract: The present application discloses a tray and a method for using same, and a battery production apparatus. The tray may be configured to carry a battery cell. The tray may include a tray body and a plurality of pressing bodies. The plurality of pressing bodies may be arranged at intervals in a first direction. The pressing bodies may be arranged on the tray body, the battery cell may be placed between two adjacent pressing bodies, each of the pressing bodies may be provided with a flexible pressing portion, and the flexible pressing portion may be configured to be in contact with the battery cell so as to press the battery cell.

Abstract: A battery cell, a cover assembly, a battery, an electricity-consuming apparatus, a method and a device of manufacturing the battery cell are provided by the present application. The battery cell includes an electrode assembly; a casing accommodating the electrode assembly, in which the casing includes a wall portion, the wall portion includes a stepped hole, the stepped hole includes a first hole segment, a second hole segment and a first stepped face; a sealing member, in which a first sealing interface is formed between the sealing member and the first stepped face, the first sealing interface surrounds the first hole segment, and the sealing member includes a ventilating hole communicating with the first hole segment; a gas-ventilating film including a body and a convex portion, in which the body covers the ventilating hole, a second sealing interface is formed between the body and the sealing member.