Abstract: The present application relates to a method, apparatus and system for inspecting a cell crush, a computer device, a storage medium, and a computer program product. The method may include: acquiring images of a flowing cell assembly by a high-speed image acquisition device; extracting image features from the images of the cell assembly; performing similarity matching between the image features and a preset crush model to obtain a similarity matching result; and obtaining a cell crush inspection result based on the similarity matching result.

Abstract: This application provides a winding and unwinding device and a battery production system. The winding and unwinding device includes a turret, a driver, and a magnetic powder clutch. The turret includes a rotation shaft and at least one winding shaft, the rotation shaft being parallel to the winding shaft. A drive shaft of the magnetic powder clutch is connected to the driver and a driven shaft of the magnetic powder clutch is connected to the rotation shaft of the turret, such that the driver drives the rotation shaft of the turret to rotate. In this application, with the magnetic powder clutch disposed between the turret and the driver, after the turret rotates to a predetermined position, the rotation of the turret can be stopped without the need to cut off the power supply, ensuring the normal operation of the driver when the turret stops rotation, thus avoiding damage to the driver.

Abstract: The present application relates to a battery cell manufacturing device and method. The battery cell comprises an electrode sheet and a separator. The electrode sheet has a free end in its own extension direction. The battery cell manufacturing device includes a winding pin and a lamination assembly. The winding pin is configured to wind the electrode sheet and separator into a battery cell. The lamination assembly is disposed upstream of the winding pin, and configured to connect the free end of the electrode sheet to the separator. The battery cell manufacturing device and method provided in the embodiments of the present application solve the problem that the free end of the electrode sheet is prone to shift relative to the separator during the battery cell production process, thus ensuring the safety of the battery cell produced.

Abstract: Some embodiments of this application disclose a method and device for locating a target region on an image, and a computer-readable storage medium. The method includes: obtaining coordinates of target points in a to-be-detected image based on a feature point recognition model; and locating the target region based on the coordinates of the target points. The to-be-detected image includes an unstably imaged target region. A target object in the target region includes a stably imaged first section and an unstably imaged second section. The target points include a feature point on the first section. The method can improve accuracy and efficiency of locating the target region.

Abstract: This application relates to the field of battery technology, and in particular, to a box assembly, a battery module, a battery, and an electrical device. The box assembly may include at least a partition piece and two end plates. In the box assembly disclosed herein, a stress relief piece may be disposed at two ends of a main body of the partition piece. The main body may be connected to the end plate by use of the stress relief piece. A corner may be formed between the stress relief piece and the main body. In this way, when the battery module is subjected to stress, at least a part of the stress can be relieved through the corner formed between the stress relief piece and the main body.

Abstract: This application discloses a rewinding apparatus and a rewinding method. The rewinding apparatus is configured to rewind a strip. The rewinding apparatus includes a rewinding mechanism and a switching mechanism. The rewinding mechanism includes two shafts that are opposite to each other along a first direction and spaced out. The two shafts are configured to rewind the strip along different conveyance paths separately. The switching mechanism includes a moving roller. The moving roller is configured to drive the strip to switch from one shaft to another shaft so that the strip switches from one conveyance path to another conveyance path. The rewinding apparatus and rewinding method disclosed in this application achieve high space efficiency and high switching efficiency.

Abstract: Embodiments of the present disclosure provide a battery, a manufacturing method and a manufacturing apparatus thereof, and a power consumption device.

Abstract: The present disclosure discloses a battery pack, including a plurality of battery modules. Each battery module includes: a battery row including a plurality of battery cells, each battery cell includes two electrodes and electrodes of all battery cells form two electrode rows arranging in the longitudinal direction; a flexible printed circuit board located between the two electrode rows; and two conductive connecting plate rows located on two sides of the flexible printed circuit board in the transverse direction respectively, each conductive connecting plate row includes a plurality of conductive connecting plates arranged in the longitudinal direction and spaced apart from each other, and each conductive connecting plate is electrically connected to the flexible printed circuit board and a corresponding electrode of a corresponding electrode row. Each battery module further includes an insulation cover covering and fixed to a top of the battery row to insulate each battery module from outside.

Abstract: The present application provides a perovskite solar cell, including conductive glass, a hole transport layer, a perovskite layer, an electron transport layer and a back electrode, where a passivation layer may be disposed between the hole transport layer and the perovskite layer, and the passivation layer may include an amide and/or a cation thereof, where the amide may include a compound of formula (1) and/or formula (2): where R1 and R2 are each independently selected from hydrogen, —R, —NR2, —NHR, —NH2, —OH, —OR, —NHCOR, —OCOR, and —CH2COOH, where R represents a straight or branched chain alkyl group having 1-10 carbon atoms, m is an integer of 0 to 10; and n is an integer of 1 to 10; and where Ar is selected from a C5-C10 aryl or heteroaryl group.

Abstract: Embodiments of this application provide a method for detecting a target point in an image. The method may include: obtaining an image under test, where the image under test may include a structure-stable first target object and a structure-unstable second target object; and processing the image under test based on a target point detection model to obtain a target point in the image under test, where the target point may include a feature point on the structure-stable first target object and a feature point on the structure-unstable second target object.

Abstract: A method and an apparatus for inspecting tab appearance of cell assembly, an electronic device, a non-transitory computer-readable storage medium, and a computer program product are provided. The method includes: obtaining an image for inspection that includes a background region and a cell assembly image region, where the cell assembly image region includes a body zone and a plurality of tab stacking regions, each tab stacking region adjoining a top edge or a bottom edge of the body zone; determining each root corner of the plurality of tab stacking regions in the image for inspection; determining two side edges of the body zone in the image for inspection; determining at least one reference edge line in the image for inspection based on the two side edges of the body zone in the image for inspection; and determining result information of the tab appearance inspection based on each root corner of the plurality of tab stacking regions in the image for inspection and the at least one reference edge line.

Abstract: A positive electrode active material and a preparation method therefor, a positive electrode plate containing same, a secondary battery, and a power consuming device are provided. The positive electrode active material has a core-shell structure, comprising an inner core and a shell coating the inner core, wherein the inner core comprises Li1+xMn1?yAyP1?zRzO4, and the shell comprises a first coating layer coating the inner core, and a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The positive electrode active material of the present application enables the secondary battery to have a higher energy density, and a good rate performance, cycling performance and safety performance.

Abstract: An image processing method includes searching for a next pixel of a skeleton branch of a target image based on an already-searched current pixel of the skeleton branch, and determining whether the skeleton branch is a burr branch based on a number of already-searched pixels of the skeleton branch.

Abstract: This application relates to a cover assembly of a secondary battery. The cover assembly includes a cover plate with an air hole; a blocker inserted into and blocking the air hole; a sealing member disposed between the blocker and the cover plate configured to seal a gap between the blocker and the cover plate; and a fastener disposed inside the air hole. The fastener is connected to the cover plate, the blocker is connected to the cover plate through the fastener. The fastener is configured to deform in response to a temperature rise, so that the blocker stops blocking the air hole. The blocker stops blocking the air hole as a temperature inside a housing rises, to discharge gas from the housing through the air hole. In this way, the secondary battery can be prevented from an explosion, while partial heat is taken away through gas discharge.

Abstract: The present application provides a tab inspection method. The method includes: determining a first start position of the tab in a second direction of the electrode plate according to a first trigger manner, where the second direction is perpendicular to the first direction; determining a second start position of the tab in the second direction of the electrode plate according to a second trigger manner; and determining, according to a distance between the second start position and the first start position, whether a position of the tab on the electrode plate deviates; where the first trigger manner is a manner for determining the start position of the tab based on a change of a height of the electrode plate in the first direction, and the second trigger manner is a manner for determining the start position of the tab based on a preset position of the tab on the electrode plate.

Abstract: The present application relates to a cell detection method and apparatus, a device, a readable storage medium, and a program product. The method may include: obtaining a first image, where the first image includes a first area where a cell is located; determining a first edge line of the cell based on the first area; and determining a detection result of the cell based on grayscale values corresponding to pixels in a preset area in the first image, where the detection result is used to indicate whether the cell includes a bottom support sheet, and the preset area is an area within a preset range from the first edge line.

Abstract: A positive electrode plate, a secondary battery, a battery module, a battery pack and a power consuming device are described. The positive electrode plate comprises a current collector, a primer coating layer provided on at least one surface of the current collector, and a positive electrode film provided on the primer coating layer, wherein the primer coating layer contains a polymer A soluble in an aqueous solvent, and the polymer A comprises a structural unit derived from a monomer containing a cyano group, a structural unit derived from a monomer containing an amide group, and a structure unit derived from a monomer containing an ester group. The polymer A is used in the primer coating layer of the positive electrode plate, which increases the molding quality, adhesive force and flexibility of the positive electrode plate, and optimizes the cycling performance of the battery.

Abstract: This application relates to a lithium ion secondary battery comprising a battery core and an electrolyte, wherein the battery core comprises a lithium-manganese-based positive electrode active material; the electrolyte comprises a solvent, a lithium salt and an additive comprising vinylene carbonate; and wherein the weight percentage q of the electrolyte based on the total weight of the positive electrode active material layer in the battery core, the weight percentage r of vinylene carbonate present in the electrolyte, the compaction density s of the negative electrode active material layer in the battery core and the weight percentage p of manganese element present in the positive electrode active material satisfies 0.05?q·r·s/p?6, wherein the units of q, r, and p are wt %, and the unit of s is g/cm3. The lithium ion secondary battery in this application has relatively high safety performance, cycle performance and storage performance.

Abstract: A vacuum generator may comprise: a generator body provided with an air inlet, a contraction pipe section, an expansion pipe section, a negative pressure generation cavity, and an air outlet that may be sequentially communicated, where in a ventilation direction from the air inlet to the air outlet, a pipe diameter of the contraction pipe section may be gradually decreased, a pipe diameter of the expansion pipe section may be gradually increased, and the negative pressure generation cavity may be constructed to generate an inner cavity jet flow negative pressure when gas ejected from the expansion pipe section flows through the negative pressure generation cavity; wherein the generator body may be further provided with a negative pressure suction flow channel, and the negative pressure suction flow channel may comprise a suction port section and a reduced-diameter flow channel section.

Abstract: A method for overcurrent detection in a battery, a battery management system, and a battery are provided. A present detection current is determined based on a pre-set detection current determination strategy, which can ensure the accuracy of the present detection current. Secondly, the current threshold is determined according to the charge/discharge state and the current temperature of the battery, that is, the influence of the charge/discharge state and the current temperature on the current threshold is taken into account, which enables the current threshold to match the charge/discharge state and the current temperature and to be more refined. Finally, when comparing the present detection current with the current threshold, if the present detection current exceeds the current threshold to satisfy the preset condition, it is determined that an overcurrent fault occurs in the battery, which makes the detection result accurate.