Abstract: The disclosure relates to an electrode assembly and its forming method and a manufacturing system, a secondary battery, a battery module and a device. The electrode assembly includes: a first electrode plate including a plurality of bending sections and a plurality of stacked first stacking sections, each bending section being configured to connect two adjacent first stacking sections, herein the bending section includes a guiding portion for guiding the bending section to be bent during production; and a second electrode plate with a polarity opposite to that of the first electrode plate, the second electrode plate including a plurality of second stacking sections, and each second stacking section being disposed between two adjacent first stacking sections.

Abstract: Embodiments of the present application provides an electrode assembly and a manufacturing method thereof, a battery cell, a battery, and an electrical apparatus. The electrode assembly comprises: a first electrode plate; and at least two second electrode plates stacked and bent to form at least one bent portion, the bent portion comprising at least one bent section and at least two straight sections, two adjacent straight sections being connected through the bent section, where for each bent portion, the first electrode plate is provided between two adjacent straight sections, and the polarity of the first electrode plate is opposite to the polarity of the adjacent second electrode plate.

Abstract: An electrode assembly, a battery cell, a battery, and an electrical apparatus are disclosed. The electrode assembly includes a first electrode plate, the electrode plate includes a current collector and active material layers arranged on the current collector, the active material layer is provided with a plurality of material removal regions at intervals in an extension direction (L) of the first electrode plate, and the material removal region extends in a width direction (Y) of the first electrode plate; the active material layer is provided with a marking portion, a width of the marking portion in the extension direction (L) of the first electrode plate is greater than or equal to a width of the material removal region, and the marking portion spans across the material removal region.

Abstract: Some embodiments of this application provide an electrode assembly, a battery cell, a battery, and an electrical device. The electrode assembly includes at least one first electrode plate, where the first electrode plate is bent and includes: a current collector; and an active material layer, disposed on the current collector. The active material layer includes a material-removed region in at least a part of bends of the first electrode plate. The material-removed region extends along a width direction of the first electrode plate. A depth of the material-removed region does not exceed a thickness of the active material layer at which the material-removed region is located.

Abstract: Provided are a marking device and a lamination manufacturing system. The marking device includes an attachment mechanism, a coating mechanism, and a stripping mechanism, wherein the attachment mechanism is configured to attach shielding members to a marking area of a base material; the coating mechanism is arranged downstream of the attachment mechanism along a conveying direction of the base material, and the coating mechanism is configured to coat the base material; and the stripping mechanism is arranged downstream of the coating mechanism along the conveying direction, and the stripping mechanism is configured to detach the shielding members from the base material to form scores on the marking area.

Abstract: This application provides a method, apparatus, and system for corner fold detection on a cathode electrode plate of a composite material strip, an electronic device, a laminator, a computer-readable storage medium, and a computer program product. The method includes: acquiring a to-be-inspected image of a composite material strip by using an image acquisition unit, where the to-be-inspected image includes an electrode plate body zone of the cathode electrode plate; extracting the electrode plate body zone from the to-be-inspected image; and performing corner fold detection on the electrode plate body zone. In the technical solutions of embodiments of this application, corner fold detection can be performed quickly and accurately on a cathode electrode plate of a composite material strip, thereby improving the production yield of laminated cell assemblies.

Abstract: Method, apparatus, and system for inspecting a cathode electrode plate of a composite material tape are provided. The method includes: using a camera apparatus to photograph a composite material tape being transported on a laminator to obtain an inspection image covering the composite material tape, where the inspection image includes a cathode electrode plate body region; extracting the cathode electrode plate body region from the inspection image; and inspecting the cathode electrode plate body region to determine a metal leakage defect existing in the cathode electrode plate body region. In the technical solution of the embodiments of this application, an inspection can be performed on a composite material tape being transported on a laminator, so that a metal leakage defect existing on a cathode electrode plate can be detected in real time in the production process of a laminated cell assembly.

Abstract: Provided are a marking device and an electrode sheet production system. The marking device includes a vibration mechanism and a cutter head. The vibration mechanism is provided on a side of the electrode sheet provided with the active material layer along the thickness direction of the electrode sheet. The cutter head is connected to the vibration mechanism and the cutter head extends in a width direction of the electrode sheet. The vibration mechanism is configured to drive the cutter head to vibrate in a thickness direction of the electrode sheet and to allow the cutter head to contact the electrode sheet, thus forming a score on the electrode sheet.

Abstract: An air-blowing roller includes: a roller body, where a plurality of air outlets are disposed on an outer peripheral surface of the roller body, the plurality of air outlets are arranged along an axial direction of the roller body, an air exhaust direction of the air outlets is tangent to the outer peripheral surface of the roller body, and air exhaust directions of the plurality of air outlets are consistent. A dust removal apparatus includes a conveyance mechanism, an air-blowing roller assembly, and an air intake roller assembly.

Abstract: An Overhang detection method for a battery electrode sheet includes acquiring an image of a battery electrode sheet; determining the locations of a plurality of electrode sheet edges in the image, wherein the plurality of electrode sheet edges are electrode sheet edges related to an Overhang measurement value corresponding to the image, the location of each electrode sheet edge is determined on the basis of an area where each electrode sheet edge is located, and the area where each electrode sheet edge is located is a dynamically determined area; and determining, according to the locations of the plurality of electrode sheet edges, the Overhang measurement value corresponding to the image.

Abstract: An Overhang detection method for a battery electrode sheet includes acquiring an image of a battery electrode sheet; determining the locations of a plurality of electrode sheet edges in the image, wherein the plurality of electrode sheet edges are electrode sheet edges related to an Overhang measurement value corresponding to the image, the location of each electrode sheet edge is determined on the basis of an area where each electrode sheet edge is located, and the area where each electrode sheet edge is located is a dynamically determined area; and determining, according to the locations of the plurality of electrode sheet edges, the Overhang measurement value corresponding to the image.

Abstract: A material strip feeding detection method for a stacking machine and a material strip feeding detection apparatus for the stacking machine are provided. The material strip comprises a plurality of first electrode plates distributed continuously in a feeding direction. The method comprises: shooting with at least one set of camera apparatuses to obtain at least one material strip image; determining whether the material strip image comprises a first marker and a second marker; acquiring a target deviation of the first marker relative to a preset position based on the material strip image in response to determining that the material strip image comprises the first marker; controlling the material strip feeding detection apparatus to perform feeding deviation rectification of the material strip conveyed on a conveying mechanism based on the target deviation, and controlling a cutting mechanism to cut the material strip on the conveying mechanism after the feeding deviation rectification.

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 an electrode assembly, a battery cell, a battery and an electrical device, belonging to the technical field of battery manufacturing. The electrode assembly comprises: a first electrode sheet, comprising a plurality of bending segments and a plurality of stacking segments arranged in layers, wherein each bending segment is configured to connect two adjacent stacking segments, the first electrode sheet has a first broken seam, and the first broken seam extends in the width direction of the first electrode sheet to break the first electrode sheet; and a plurality of second electrode sheets, wherein the polarity of the second electrode sheet is opposite to the polarity of the first electrode sheet, and each second electrode sheet is arranged between two adjacent stacking segments in the stacking direction of the plurality of stacking segments.

Abstract: The disclosure relates to an electrode assembly and its forming method and a manufacturing system, a secondary battery, a battery module and a device. The electrode assembly includes: a first electrode plate including a plurality of bending sections and a plurality of stacked first stacking sections, each bending section being configured to connect two adjacent first stacking sections, herein the bending section includes a guiding portion for guiding the bending section to be bent during production; and a second electrode plate with a polarity opposite to that of the first electrode plate, the second electrode plate including a plurality of second stacking sections, and each second stacking section being disposed between two adjacent first stacking sections.

Abstract: A cigarette paper additive having harm reduction function and application thereof are provided. The additive contains alkali metal salts of butane tetracarboxylic acid or cyclobutane tetracarboxylic acid which are prepared by reacting the butane tetracarboxylic acid or cyclobutane tetracarboxylic acid with alkali. The application thereof is evenly adding the aqueous additive solution at different concentrations to cigarette paper by a metering rod-type film transfer sizing machine in a sizing section of the cigarette paper production, and the produced cigarette paper is used for cigarette production that can effectively reduce release of CO, phenol and tar in the mainstream smoke, and has better effects of harm reduction and tar reduction. The method of the invention is easy, does not need to alter the existing cigarette paper production process, and has low cost and higher industrial application value.

Abstract: A cigarette paper additive having harm reduction function and application thereof are provided. The additive contains alkali metal salts of butane tetracarboxylic acid or cyclobutane tetracarboxylic acid which are prepared by reacting the butane tetracarboxylic acid or cyclobutane tetracarboxylic acid with alkali. The application thereof is evenly adding the aqueous additive solution at different concentrations to cigarette paper by a metering rod-type film transfer sizing machine in a sizing section of the cigarette paper production, and the produced cigarette paper is used for cigarette production that can effectively reduce release of CO, phenol and tar in the mainstream smoke, and has better effects of harm reduction and tar reduction. The method of the invention is easy, does not need to alter the existing cigarette paper production process, and has low cost and higher industrial application value.