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: 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: Provided are a roller assembly, a battery cell manufacturing device, and an adjustment method of a roller, which relates to the field of battery manufacturing technology. The roller assembly includes a holder, a roller, and a first adjusting member. The roller is rotatably mounted on the holder. The first adjusting member is rotatably mounted on the holder, and one end of the roller is rotatably connected to the first adjusting member. A rotation axis of the roller does not coincide with a rotation axis of the first adjusting member. One end of the roller is rotatably mounted on the holder through the first adjusting member. The rotation axis of the first adjusting member does not coincide with the rotation axis of the roller, and therefore, rotation of the first adjusting member is capable of driving a corresponding end of the roller to rotate, thereby adjusting an extension direction of the roller.

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: Provided are a roller assembly, a battery cell manufacturing device, and an adjustment method of a roller, which relates to the field of battery manufacturing technology. The roller assembly includes a holder, a roller, and a first adjusting member. The roller is rotatably mounted on the holder. The first adjusting member is rotatably mounted on the holder, and one end of the roller is rotatably connected to the first adjusting member. A rotation axis of the roller does not coincide with a rotation axis of the first adjusting member. One end of the roller is rotatably mounted on the holder through the first adjusting member. The rotation axis of the first adjusting member does not coincide with the rotation axis of the roller, and therefore, rotation of the first adjusting member is capable of driving a corresponding end of the roller to rotate, thereby adjusting an extension direction of the roller.

Abstract: A cutter driving apparatus configured to drive a cutter of a cutting device includes a following drive assembly, a cutting drive assembly, a cutter drive rod connected to the following drive assembly, and a connecting rod assembly having a first connecting end connected to the cutting drive assembly and a second connecting end connected to the cutter drive rod.

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.