Abstract: The present disclosure provides an apparatus for manufacturing a secondary battery and an electrode plate cutting unit for a secondary battery, in which, since a lower cutter is fixedly pressed using a high-strength spring, the lower cutter has good fixing strength and cutting precision is stably maintained, thereby preventing deintercalation of an active material when cutting an electrode plate and improving quality of a cut surface.

Abstract: The present disclosure provides an apparatus for manufacturing a secondary battery and an electrode plate cutting unit, which are capable of preventing cracks or foreign substances from occurring in a mixture portion and preventing an active material from being transferred to a separator by reducing the load applied to a load concentration area of an electrode plate while the electrode plate is cut.

Abstract: The present disclosure is directed to suppressing movement of an electrode plate when cutting an electrode plate to prevent deintercalation of an active material, and not causing damage or deformation of a front end surface through a uniform surface contact between a cutter and a tilting stripper. The electrode plate cutting unit includes a lower cutting unit having a lower cutter installed below a transport path of an electrode plate moving along the transport path and having an inclined blade and a support stripper positioned at a side portion of the lower cutter to support the electrode plate upwardly, and an upper cutting unit having an upper cutter provided to move upwardly and downwardly above the transport path to cut the electrode plate through cross motion with the lower cutter when moving downwardly and a tilting stripper installed at a side portion of the upper cutter and tilted while supporting the electrode plate toward the lower cutter.

Abstract: The present disclosure provides an apparatus for manufacturing a secondary battery and an electrode plate cutting device that can prevent damage to a mixture portion or generation of foreign materials by expanding contact areas of a lower cutter and an upper cutter, thereby reducing concentration of a load. The apparatus includes a transfer part configured to move an electrode plate, which will be cut, along a transfer path, a winding part configured to wind the cut electrode plate transferred by the transfer part, and an electrode plate cutting device including an upper cutter installed above the transfer path of the electrode plate and a lower cutter installed below the electrode plate transfer path and cuts the electrode plate through cross motion with the upper cutter and in which a flat support portion configured to support the electrode plate is formed at an upper portion thereof.

Abstract: The present disclosure relates to a secondary battery electrode plate cutting device, a secondary battery manufacturing device including the same, and a secondary battery manufacturing method. The secondary battery electrode plate cutting device includes a cutting unit provided with an upper cutter and a lower cutter installed on opposite sides with an electrode plate, which moves along a transfer path therebetween and configured to cut the electrode plate, a cover film supply part configured to supply a cover film to be laminated on a surface of the electrode plate, and a laminating part configured to laminate with the cover film the electrode plate before cutting so that the cutting unit cuts the cover film together with the electrode plate.

Abstract: The present disclosure provides an apparatus for manufacturing a secondary battery and an electrode plate cutting unit for manufacturing a secondary battery, which enable continuous cutting and prevents productivity from being lowered by supporting a cut front end after cutting an electrode plate to prevent the electrode plate from falling down a normal transport path. An apparatus for manufacturing a secondary battery includes a transport unit configured to transport an electrode plate along a transport path, a winding unit configured to receive and wind the electrode plate transported by the transport unit, and a cutting unit having a cutting part which cuts the electrode plate that is transported, and a separation prevention part which supports a front end portion of a subsequent electrode plate, which moves toward the winding unit, in a transport direction after cut by the cutting part to prevent the subsequent electrode plate from deviating from the transport path toward the winding unit.

Abstract: The present disclosure provides an apparatus for manufacturing a secondary battery and an electrode plate cutting unit, which can extend an operating lifetime by a factor of two or more, reduce process costs, improve productivity, and maintain constant cutting performance, and are very useful in a process requiring a high-quality cutting operation.

Abstract: The present disclosure is directed to suppressing movement of an electrode plate when cutting the electrode plate to prevent deintercalation of an active material from a substrate when cutting the electrode plate. The electrode plate cutting machine includes an upper cutting unit having an upper cutter installed above a transport path of an electrode plate transported along the transport path, and an upper stripper disposed at a side portion of the upper cutter to press the electrode plate downwardly and support the electrode plate when cutting the electrode plate, and a lower cutting unit having a lower cutter installed below the upper cutting unit with the electrode plate interposed therebetween to cut the electrode plate through cross movement with the upper cutter, and a lower stripper positioned at a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter when cutting the electrode plate.

Abstract: The present disclosure provides an electrode plate cutting machine and an apparatus for manufacturing a secondary battery, which may prevent foreign substances or cracks from occurring in a mixture portion while an electrode plate is cut and prevent an active material from being transferred to a separator. The electrode plate cutting machine includes an upper cutter installed above a transport path of an electrode plate transported along the transport path, a lower cutter installed below the transport path to cut the electrode plate, and a stripper installed on a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter while the electrode plate is cut, wherein the stripper includes a main body which provides a supporting force and a supporter supported by the main body and having a relatively low hardness compared to the upper cutter, the lower cutter, and the main body.

Abstract: A rechargeable battery includes: a spiral wound electrode assembly; a case accommodating the electrode assembly; a vent plate closing and sealing an opening at a side of the case; a current collecting plate electrically connecting a second electrode of the electrode assembly and a beading portion of the case; and a gasket between the second current collecting plate and the vent plate and between the second current collecting plate and the case. The second current collecting plate includes: a base portion on the second electrode; an elastic portion bent from the base portion at an inward angle toward a center of the base portion and at an outward angle toward an outer edge of the base portion; and a wing welding portion connected to an end of the elastic portion and welded to the beading portion.

Abstract: The present disclosure relates to a method of analysis by an optical marker, including: irradiating a broadband light source onto a spherical dielectric material; measuring an interference spectrum of reflected light from the spherical dielectric material; and analyzing the reflected light using thin-film interference theory.

Abstract: The present disclosure relates to a method of analysis by an optical marker, including: irradiating a broadband light source onto a spherical dielectric material; measuring an interference spectrum of reflected light from the spherical dielectric material; and analyzing the reflected light using thin-film interference theory.