Abstract: This application provides a roller, an inspection method for a camera, a camera inspection apparatus, a coil conveying method, a coil conveying apparatus, an electronic device, a computer-readable storage medium, and a computer program product. The roller includes a roller body and a calibration sheet. The roller body includes a roller surface for supporting a coil; the calibration sheet is located on the roller surface of the roller body and avoids the coil, and the calibration sheet is used for inspection of the camera.

Abstract: The present application provides a negative electrode active material, a secondary battery comprising the same and an electrical device, wherein the negative electrode active material comprises a matrix material and a silicon-based material, the matrix material comprises a plurality of pore structures, at least a part of the silicon-based material is located in pore structures of the matrix material, the silicon-based material comprises a crystalline silicon-based material, a region formed by extending from outer surface of particle of the negative electrode active material to inside of the particle by a distance of 0.5 times a length between any point on the outer surface of the particle of the negative electrode active material and a core of the particle is recorded as an outer region, and a region inside the outer region is recorded as an inner region.

Abstract: A visual detection light source and tab detection equipment are described. The visual detection light source is configured to irradiate a side face of a tab portion, and includes a main light source and a supplementary light source; the main light source and the supplementary light source are arc-shaped light sources, the main light source and the supplementary light source are disposed concentrically, and the main light source is disposed outside the supplementary light source; the main light source is configured to irradiate the side face of the tab portion at an inclined irradiation angle; and the supplementary light source is configured to vertically irradiate the side face of the tab portion.

Abstract: This application discloses a tab detection mechanism and a tab detection device. The tab detection mechanism may be configured to detect a tab portion on an electrode core. The tab detection mechanism may include a visual camera; a prism disposed below the visual camera and configured to reflect light on a side surface of the tab portion to the visual camera; and a first driver, connected to the visual camera and configured to drive the visual camera to move in a vertical direction. The visual camera is capable of shooting a plurality of images while moving.

Abstract: A temperature sensor is described. The temperature sensor includes a body, provided with a channel for heat-exchanging liquid flowing at an interior of the body; and a sensing assembly, arranged on the body and including a temperature sensing member and a sensing casing, in which one end of the sensing casing is opened, a cavity is formed inside the sensing casing, the sensing casing is mounted on the body, a closing end of the sensing casing extends into the channel, the temperature sensing member is arranged in the cavity to sense the temperature of the heat-exchanging liquid through the sensing casing, and a thermal conductivity of the sensing casing is larger than a thermal conductivity of the body. By using the material with a higher thermal conductivity in the sensing casing, the temperature conduction speed can be accelerated, and the detecting result of the temperature sensor can be more accurate.

Abstract: This application relates to a delivery apparatus and an automated assembly line. The delivery apparatus may include: a delivery assembly including a delivery guide rail and a delivery tool, where the delivery tool may be slidably disposed on the delivery guide rail; a docking assembly including a docking drive structure and a docking guide rail, where the docking drive structure may be configured to drive the docking guide rail to move relative to the delivery guide rail so that the docking guide rail is able to dock with the delivery guide rail; and a blocking assembly configured to block the delivery tool on the delivery guide rail before the docking guide rail docks with the delivery guide rail for receiving the delivery tool.

Abstract: Disclosed is a coating equipment. The coating equipment may include a back roll, a coating die head, and a detection assembly. The coating die head may have a coating opening facing towards the back roll, and the coating opening may extend in an axial direction of the back roll. The detection assembly may be configured to detect a position of the coating die head relative to the back roll. The detection assembly may include a level mounted on the coating die head.

Abstract: Method and apparatus for calibrating a surface density measurement device are provided, and relate to the field of battery testing devices. The apparatus for calibrating the surface density measurement device calibration apparatus includes a mounting bracket, a standard member, and an adjusting member. The mounting bracket is configured for mounting the surface density measurement device. The standard member includes multiple standard zones with different densities. The adjusting member connects the standard member and the mounting bracket, and the adjusting member is configured to adjust positions of the multiple standard zones such that the multiple standard zones move one by one to a testing position of the surface density measurement device. The standard member is used instead of an electrode plate for calibrating the surface density measurement device, which reduces the production time of the electrode plate, and improves the calibration efficiency of the surface density measurement device.

Abstract: The present disclosure provides a multifunctional high-voltage connector and a battery product, the multifunctional high-voltage connector comprises: an upper cover; a pedestal; a conductive connection structure; two mating terminals; and a harness assembly. The conductive connection structure is used to make the two mating terminals be connected in series, and the harness assembly is directly connected to one of the mating terminals. When the upper cover and the pedestal are assembled, the conductive connection structure is simultaneously in contact with the two mating terminals, thereby turning on the high-voltage circuit. When the battery product requires maintenance, the upper cover is directly detached from the base, thereby turning off the high-voltage circuit. The battery product can be electrically connected to an external device via the harness assembly.

Abstract: The present application provides a detection device and pole piece manufacturing equipment. The detection device includes: a laser ranging sensor; and a cooling module, which includes a first protective enclosure and a cooling plate, where the first protective enclosure encloses the outside of the laser ranging sensor; the first protective enclosure is provided with an avoidance portion for avoiding a laser light path of the laser ranging sensor; the first protective enclosure has a first opening; the cooling plate covers the first opening; an air flow channel is defined inside the cooling plate; surfaces of the cooling plate are provided with air inlet holes and first air outlet holes which are communicated with the air flow channel; and the first air outlet holes are disposed in a manner of facing the laser ranging sensor to blow air to the laser ranging sensor to cool the laser ranging sensor.

Abstract: A positive electrode slurry contains polyether polyol, where the polyether polyol has the following constitutional formula: where R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, and Y are as defined in the specification.

Abstract: Embodiments of this application provide a battery, an apparatus using a battery, and a manufacturing method and a manufacturing device of battery. The battery includes a battery cell and a thermal management component. The battery cell has a side wall and a bottom wall that are connected to each other. The thermal management component is configured to accommodate fluid to regulate temperature of the battery cell, where an accommodating portion is provided on the thermal management component, and configured to accommodate the battery cell, and the accommodating portion is attached to the bottom wall and side wall of the battery cell, to enable heat transfer between the battery cell and the thermal management component. The battery cell in the battery provided in the embodiments of this application can dissipate heat efficiently.

Abstract: A die-cutting device includes a conveying mechanism configured to convey an electrode plate including uncoated and coated regions connected to each other, a cutting mechanism located on one side of the electrode plate in a thickness direction and configured to cut the uncoated region to form a scrap portion and a tab connected to the coated region, a first limiting member located between the electrode plate and the cutting mechanism in the thickness direction and provided with a cutting hole that allows laser light from the cutting mechanism to pass through and matches a cutting trajectory of the laser light, and a second limiting member located on a side of the electrode plate facing away from the first limiting member in the thickness direction and configured to cooperate with the first limiting member to limit the electrode plate in the thickness direction.

Abstract: A battery and an electrical apparatus are described. The battery includes: a battery cell, a first wall of the battery cell being provided with a pressure relief mechanism; a thermal management component configured to regulate the temperature of the battery cell, the thermal management component being attached to a second wall of the battery cell, and the second wall being different from the first wall; and a box body, the box body including an electrical cavity and a collection cavity, wherein the electrical cavity is configured to accommodate the battery cell and the thermal management component, and the collection cavity is configured to collect emissions from the battery cell when the pressure relief mechanism is actuated. The battery and the electrical apparatus of the embodiments of the present application can improve the safety of the battery.

Abstract: A film laminating apparatus and an electrode sheet processing device are disclosed. The film laminating apparatus includes a frame, a conveying mechanism, a mounting plate, and a plurality of film laminating mechanisms, the plurality of film laminating mechanisms being mounted on the mounting plate; the conveying mechanism being mounted on the frame and being capable of conveying an electrode sheet in a first direction into the film laminating apparatus; and the mounting plate being mounted on the frame and forming an included angle with the first direction. The plurality of film laminating mechanisms are tilted or vertically arranged relative to the conveying direction of an electrode sheet. The space occupied by the plurality of film laminating mechanisms, the size of the film laminating apparatus, the volume of the film laminating apparatus, and the space occupied by the film laminating apparatus in the conveying direction of the electrode sheet is reduced.

Abstract: A rolling device includes a roller, a heat exchange assembly, and an adjustment assembly. The roller is provided with a rolling surface configured to roll a target member. The heat exchange assembly is arranged opposite to the rolling surface. The heat exchange assembly is configured to adjust the temperature of the rolling surface. The adjustment assembly is connected to the heat exchange assembly and is configured to adjust the position of the heat exchange assembly in an axial direction of the roller, so as to adjust temperatures of different regions of the rolling surface of the roller in the axial direction. A rolling system includes the rolling device, a measurement device and a controller, the measurement device is configured to measure the thickness of the target member after rolling; and the controller is connected in communication with the measurement device and the adjustment assembly.

Abstract: An electrode assembly, a secondary battery, a battery pack, and an electrical apparatus. In the electrode assembly, there are several electrode plate portions sequentially arranged in a laminated manner along its own thickness direction. During structural design, the current collector in at least one of the electrode plate portions is configured as a barrier, and by controlling the ratio between the thermal conductivity ?0 of the barrier and the thickness d0 of the barrier to be less than 3×107 W/(K*m2), the heat flux density of the barrier along the thickness direction of the electrode assembly is reduced and the thermal resistance is increased, thus forming an effective thermal barrier in the thickness direction of the electrode assembly.

Abstract: A battery cell may include a housing, an electrode assembly, a current collector and a pressure relief structure. The end cover may be configured for covering the opening of the housing. The current collector may be configured for connecting the electrode assembly and the end cover. The pressure relief structure may be arranged on the end cover. A side of the end cover facing away from the electrode assembly may be provided with a concave, the concave may be configured for accommodating at least a portion of the pressure relief structure, a connecting part may be formed on the end cover in an area where the concave may be provided, the connecting part may be configured for being welded to the current collector to form a first welded part, and the pressure relief structure may cover the first welded part along a thickness direction of the end cover.

Abstract: Embodiments of the present application provide a battery cell, a method and a system for manufacturing the battery cell, a battery, and an electrical apparatus. The battery cell includes a housing, an electrode component, a first electrode terminal, and a second electrode terminal. An outer surface of the housing includes a first surface and a second surface oppositely arranged along a first direction, and two third surfaces oppositely arranged along a second direction, each of the third surfaces is connected to the first surface and the second surface, the housing is provided with a recess recessed relative to the first surface, and at least one end of the recess along the second direction extends to the third surface. An electrode component is accommodated within the housing.

Abstract: This application provides a method for capacity recovery of lithium-ion secondary battery. The method includes the following steps: (1) providing a capacity-degraded lithium-ion secondary battery; (2) providing a capacity recovery agent, the capacity recovery agent including a p-phenylenediamine compound, a lithium salt, and an organic solvent, and the organic solvent being used to dissolve the p-phenylenediamine compound and the lithium salt; (3) injecting the capacity recovery agent into the lithium-ion secondary battery; (4) enabling the capacity recovery agent to react inside the lithium-ion secondary battery; and (5) pouring out the liquid mixture inside the lithium-ion secondary battery after reaction and injecting an electrolyte into the lithium-ion secondary battery.