Abstract: The present invention relates to an electrode active material, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active material includes: a core and a coating layer, where the core includes a ternary material, the coating layer coats the core, the coating layer includes a reaction product of a sulfur-containing compound and a lithium-containing compound, and the reaction product includes element Li, element S, and element O.

Abstract: A method, an apparatus, an electronic device, and a storage medium for detecting water content in a battery are provided. The method comprises: obtaining a capacitance detection value of a battery to be tested by measurement; and determining a first water content value of the battery to be tested according to the capacitance detection value and a capacitance-water content relationship model. The capacitance-water content relationship model is obtained according to the relationship between sample batteries with different water content values and their sample capacitance values. By pre-constructing the relationship between the water content of the sample battery and the sample capacitance value and determining the water content of the battery to be tested according to the relationship and the capacitance value of the battery to be tested, the step of manually cutting the electrode sheet is reduced, and the efficiency of detecting the water content in the battery is improved.

Abstract: This application provides a battery box, which includes: a box body, a first battery group and a sealing member, where the first battery group includes: a first battery row including a plurality of batteries, all explosion-proof valves of the first battery row form a first explosion-proof valve row; a first guide plate, configured to be sealed and disposed above the first explosion-proof valve row, and forming a first path with an upper surface of the first battery row; and a first end plate, provided with a first recess communicating with one end of the first path, and an opening is disposed at a position, corresponding to the first recess, of the box body, where the sealing member is configured to seal the opening and be capable of being damaged to open the opening. The battery box of this application effectively exports heat to the outside.

Abstract: Embodiments of this application provide a measurement method and a measurement apparatus. The measurement method includes: acquiring a first image and a second image of a target object, where the first image is acquired by a camera located on a non-backlight side of the target object, and the second image is acquired by a camera located on a backlight side of target object; and measuring the target object for size information according to the first image and the second image. The technical solution of this application can improve accuracy and precision of inspection while improving production efficiency.

Abstract: Embodiments of the present application provide a battery cell, a battery, a power consumption device, and a method and device for producing a battery cell. The battery cell includes: a housing having an opening; an electrode assembly accommodated in the housing; an end cover configured to cover the opening and provided with an electrode terminal; and a support, disposed in the housing, where the support and the electrode assembly are arranged in a first direction, the support and the end cover are arranged in a second direction, and the first direction is perpendicular to the second direction, the support abuts against the electrode assembly in the first direction so as to limit the electrode assembly.

Abstract: A back roller includes a roller body and a wear-resistant layer. The roller body has an axis and a roll surface disposed around the axis. The wear-resistant layer covers the roll surface. Vickers hardness (H) of the wear-resistant layer is 800 HV?H?1400 HV. The roll surface is covered by the wear-resistant layer, and the Vickers hardness (H) of the wear-resistant layer is controlled to be between 800 HV and 1400 HV, so that the roll surface is effectively protected, and wear resistance of the roll surface is improved. In this way, the wear-resistant layer is in direct contact with a material during operation, thereby effectively reducing an abrasion loss on the roll surface and extending the service life of the roll surface.

Abstract: A storage and transportation device, which relates to the technical field of storage and transportation apparatuses are disclosed. The storage and transportation device comprises a cover, a supporting plate and a sealant. The supporting plate covers an opening of the cover to form a space for accommodating an item to be transported. The storage and transportation device further comprises a first sealant groove and a second sealant groove arranged at a sealed junction between the cover and the supporting plate, the sealant is contained in each of the first sealant groove and the second sealant groove, and the two parts of the sealant are connected.

Abstract: The present application relates to a welding positioning apparatus, wherein a press head may be capable of pressing a first component against the second component, and dust generated during welding may be allowed to be collected in a dust collection chamber, and discharged to the outside of the welding positioning apparatus by an external dust extractor to keep the welding environment clean, thereby improving the welding quality.

Abstract: A method for preparing sulfuryl fluoride by electrofluorination is described. The method for preparing sulfuryl fluoride by electrofluorination comprises a step of subjecting sulfur dioxide and a hydrogen fluoride complex to an electrofluorination reaction in an electrolytic cell. By means of this, the production cost of sulfuryl fluoride can be reduced, and the purity and yield of sulfuryl fluoride can be improved, thus making it suitable for industrial production.

Abstract: A stacking device may include a negative delivery structure, a separator delivery structure, a first heater and a positive delivery structure. The negative delivery structure may be configured to deliver a negative electrode sheet. The separator delivery structure may be configured to deliver separators to two sides of the negative electrode sheet such that the separators are attached to the negative electrode sheet. The first heater may be arranged downstream of the separator delivery structure and configured to heat the negative electrode sheet and the separators. The positive delivery structure may be arranged downstream of the first heater and configured to deliver positive electrode sheets to the two sides of the negative electrode sheet such that the positive electrode sheets are attached to the separators.

Abstract: Provided are a secondary battery, a battery module, a battery pack and an electric device. The secondary battery includes an electrode assembly and an electrolytic solution configured to infiltrate the electrode assembly, wherein the electrode assembly includes a negative electrode plate, a separation film and a positive electrode plate, and the negative electrode plate includes a negative electrode current collector and a negative electrode material layer located on at least one surface of the negative electrode current collector; and by setting a tortuosity of the negative electrode plate as ?, the ? satisfies Formula I below: ?=0.5(?)????Formula I where, ? is a porosity of the negative electrode material layer, and ? is a Bruggeman index of the negative electrode material layer, and the ? and a conductivity ? of the electrolytic solution satisfy Formula II below: (2?)0.5+6???(2?)0.5+10??Formula II. Therefore, the secondary battery has an excellent fast-charging performance.

Abstract: Embodiments of this application provide a testing apparatus, configured to test a battery and including a test body and a first door body. The test body may include an accommodating cavity for accommodating the battery, and an opening. The opening may communicate with the accommodating cavity, and the first door body may be connected to the opening and capable of moving relative to the opening. The first door body may have a first state and a second state; in the first state, the first door body may block a part of the opening; and in the second state, the first door body may seal the opening.

Abstract: A positive electrode active material is granular and comprises a compound represented by formula 1: (NaxAy)a?bM1[M2(CN)6]?, wherein A is selected from at least one of alkali metal elements and has an ionic radius greater than that of sodium, M1 and M2 are each independently selected from at least one of transition metal elements, 0<y?0.2, 0<x+y?2, 0???1, a+b=2, 0.85?a?0.98, (represents a vacancy, and b represents the number of vacancies; and when the positive electrode active material is dissolved, at a temperature of 20° C., into an aqueous solution having a concentration of 5 g/100 g water, a pH value of the aqueous solution is in a range of 7.6 to 8.5. The positive electrode active material has good cycling and rate performance, and a high specific capacity.

Abstract: A battery test apparatus for testing a swelling force of a battery housing may include equivalent end plates and a retractable part. An actual battery module may be replaced by the battery test apparatus, eliminating the need for a battery module and accompanying charging and discharging devices and reducing the test cost. Two equivalent end plates may be spaced apart along a first direction to replace a battery module actually in contact with the battery housing along the first direction. The retractable part may be arranged between the two equivalent end plates. The retractable part may compress the two equivalent end plates to make the equivalent end plates compress the battery housing.

Abstract: In the embodiments of the present application, an electrolyte, a lithium-ion battery comprising the electrolyte, a battery module, a battery pack, and a device are provided. The electrolyte in the embodiments of the present application comprises an organic solvent, an electrolyte lithium salt dissolved in the organic solvent, and an additive comprising a first additive and a second additive. The first additive is selected from one or more of the compounds represented by formula I, and the second additive is selected from one or more of the compounds represented by formula II. After applying the electrolyte of the present application to a lithium-ion battery, the lithium ion battery has a better cycle performance and storage performance at a high temperature, and lower direct-current impedance at a low temperature, such that the lithium ion battery has both a better high-temperature performance and a better low-temperature performance.

Abstract: The present application relates to the electrochemical field, and in particular, to a positive electrode material, and an electrochemical energy storage apparatus having thereof. The present application provides a positive electrode material, including a substrate. The substrate includes secondary particles containing primary particles. A surface of the substrate is coated with an oxide coating layer. The oxide coating layer comprises a coating element, and the coating element is selected from one or more of Al, Ba, Zn, Ti, Zr, Mg, W, Y, Si, Sn, B, Co, or P. The electrochemical energy storage apparatus comprises the foregoing positive electrode material.

Abstract: The present application relates to a harness isolation plate assembly, a battery module, a battery pack and a device. The harness isolation plate assembly includes a plurality of isolation units comprising busbars and insulating films connecting the busbars; and a connecting assembly through which the adjacent isolation units are connected. In the present application, the harness isolation plate assembly includes a plurality of separate isolation units. Upon molding, each isolation unit can be processed independently. Moreover, a size of each isolation unit is small, thus reducing processing difficulty. Furthermore, it is easy to control a location of each busbar, such that locating accuracy of the busbars is improved so as to enhance connecting reliability between the busbars and an electrode lead. Meanwhile, in each isolation unit, the busbars are connected through the insulating films, such that a risk of short circuit for the busbars is low.

Abstract: Embodiments of the present application provide a box of a battery. The box includes: an electrical chamber configured to accommodate a plurality of battery cells, a battery cell including a pressure relief mechanism, and the pressure relief mechanism being configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure; a thermal management component configured to accommodate a fluid to adjust the temperature of the battery cell; and a collection chamber configured to collect emissions discharged from the battery cell when the pressure relief mechanism is actuated, where the electrical chamber and the collection chamber are disposed on both sides of the thermal management component, a wall of the collection chamber is provided with a first pressure relief zone, and the first pressure relief zone is configured to relieve the emissions in the collection chamber.

Abstract: A battery box assembly includes a thermal management component; a frame fixed to an edge region of the thermal management component; a top cover covering the frame and forming, together with the frame and the thermal management component, a box for accommodating a battery module; a bottom protective plate fixed to the thermal management component in a direction leaving from the battery module and spaced from the thermal management component to form a sealed space; and an airflow pipeline arranged inside the box, where the airflow pipeline communicates with the sealed space on one end and communicates with the outside of the box on the other end. Also provided are a battery and a manufacturing method of the battery box assembly.

Abstract: A battery cell may include an electrode assembly and a buffer pad, where the electrode assembly may include a main body portion and a tab extending from the main body portion, the main body portion may include a first main body region and a second main body region, and the thickness of the first main body region along a first direction (T) may be smaller than the thickness of the second main body region along the first direction (T); and where the buffer pad may include a compressible first side wall, the first side wall may include a first buffer portion and a second buffer portion, the thickness of the first buffer portion along the first direction (T) may be greater than the thickness of the second buffer portion along the first direction, and the buffer pad may be provided on a side face of the main body portion.