A holder for conveyance of a cylindrical body includes a tubular portion having a hollow portion in which a cylindrical body is housed, and a protrusion having a base end connected to an inner wall surface of the tubular portion and a distal end formed as a free end. The protrusion has elasticity and flexibility, and the protrusion is disposed on an inner diameter side of an outer circumferential surface of the cylindrical body at an expected housing position such that a side surface of the distal end of the protrusion is allowed to come into contact with the outer circumferential surface while the protrusion is warped to an outer diameter side of the hollow portion.

A winding apparatus is disclosed for winding material around a core of flat shape rotated around a rotation axis carried by a crank that is in turn carried by another crank, the three rotation axes of the core and of the two cranks being motorized independently by respective electric cams, with three distinct laws of motion programmed to cancel the variations in position and speed of the material entering the core. The winding apparatus is used for the production of electric energy storage devices.

Methods, systems, and compositions for the liquid-phase deposition (LPD) of thin films. The thin films can be coated onto the surface of porous components of electrochemical devices, such as battery electrodes. Embodiments of the present disclosure achieve a faster, safer, and more cost-effective means for forming uniform, conformal layers on non-planar microstructures than known methods. In one aspect, the methods and systems involve exposing the component to be coated to different liquid reagents in sequential processing steps, with optional intervening rinsing and drying steps. Processing may occur in a single reaction chamber or multiple reaction chambers.

The present invention relates to an apparatus for manufacturing an electrode assembly including a separator feeding unit including a first roll on which one side of a separator strip is wound and a second roll on which the other side of the separator strip is wound, wherein the first and second rolls respectively unwind the separator strip so that the separator strip is fed toward a core portion of the separator strip disposed between the first and second rolls; a separator folding unit for winding the separator strip around the core portion to form a separator spiral folded in a spiral shape about the core portion; a first electrode lamination unit for laminating first electrode members on one surface of the separator spiral; and a second electrode lamination unit for laminating second electrode members on the other surface of the separator spiral.

The present invention relates to an apparatus for manufacturing an electrode assembly including a separator feeding unit including a first roll on which one side of a separator strip is wound and a second roll on which the other side of the separator strip is wound, wherein the first and second rolls respectively unwind the separator strip so that the separator strip is fed toward a core portion of the separator strip disposed between the first and second rolls; a separator folding unit for winding the separator strip around the core portion to form a separator spiral folded in a spiral shape about the core portion; a first electrode lamination unit for laminating first electrode members on one surface of the separator spiral; and a second electrode lamination unit for laminating second electrode members on the other surface of the separator spiral.

A system and method for assembling long-life cylindrical batteries. Assembly comprises use of jelly rolls of battery materials comprised of fold over tabs at end plate periphery, said tabs useful to maintaining relatively short electron paths and to maintaining electrical connections, to benefit of long useful life of battery. In a preferred embodiment, at least one starwheel enables movement and positioning of cylindrical battery cases during assembly. In a preferred embodiment, such correct positioning of battery cases enables them to receive placement of jelly roll of battery materials and to receive battery caps. Assembly comprises use of jelly rolls of battery materials comprising end plates configured of extensions of electrode in face-to-face shingle-style overlaps. Said tight overlaps, held in place by tabs, enable secure electrical connections to be maintained over long life of battery, and comprise mitigation against overheating of battery during rapid charge or discharge, thus reducing likelihood of fire.

A winding device and a material winding method are provided. The winding device is configured to wind a material and includes: a winding switching mechanism, a compounding mechanism and a breaking mechanism. The winding switching mechanism includes a rotating disc and a plurality of winding pins arranged on the rotating disc at intervals. The material is wound around one winding pin along a preset path. The compounding mechanism is provided upstream of the winding pin along the preset path and configured to laminate and then compound the plural layers of materials at a preset position. The breaking mechanism is provided between the compounding mechanism and any winding pin along the preset path and configured to break the compounded plural layers of materials at a compounding region.

Various arrangements for compressing a cylindrical battery cell are presented herein. The cylindrical battery cell may be wrapped in a buffer material. The buffer material may then be compressed using a compression mechanism. The buffer material may uniformly distribute pressure applied to the buffer material to a curved sidewall of the cylindrical battery cell.

First group data indicating a position of a first end surface of a first sheet material and second group data indicating a position of a second end surface of a second sheet material are acquired from an inspection machine, and information indicating whether or not a winding body has a defect, and which constituent of a sheet material supplier is a cause of the defect in a case where the winding body has the defect, on the basis of a positional relationship among continuous positions of the first end surface indicated by the first group data, continuous positions of the second end surface indicated by the second group data, and reference lines, is output to a display for maintenance.

A notification determinator determines whether or not an inspection result of a winding body indicates defective on the basis of whether or not continuous positions of a first end surface and a second end surface indicated by first group data and second group data are separated from reference positions by a predetermined distance or more. In a case where the inspection result of the winding body indicates defective, a notification determinator performs a notification that inspection in an inspection machine is not performed normally, and outputs information indicating that a cause of the defect is a take-out chuck of an inspection machine or any of a plurality of winding cores to a display for maintenance.