Abstract: The present invention relates to a secondary battery supporting the center part of an electrode assembly to enhance stability and reliability. For example, disclosed is a secondary battery comprising: an electrode assembly formed by winding a first electrode plate, a separator and a second electrode plate; a case for accommodating the electrode assembly; a current collection plate electrically connected to the first electrode plate and coupled to the upper part of the electrode assembly; and a core insulation member coupled to a winding center of the electrode assembly at the upper part of the current collection plate, wherein the core insulation member includes an insertion part having an inner hole, and a flange part extending in the horizontal direction from the upper end of the insertion part.

Abstract: Disclosed is a secondary battery, which has a reinforced strength and can simplify the manufacturing process thereof. For example, one embodiment provides a secondary battery which comprises: an electrode assembly including a first electrode plate and a second electrode plate, wherein one of the first electrode plate and the second electrode plate includes a plurality of first tabs formed to protrude in one direction; a first current collection tab coupled to the first tabs; a case housing the electrode assembly; and a cap assembly coupled to the upper part of the case, wherein the first current collection tab is coupled to one of the cap assembly and the bottom surface of the case.

Abstract: The present invention relates to a secondary battery in which an electrode assembly and a current collection plate may be easily welded and safety may be improved. As an embodiment, disclosed is a secondary battery comprising: an electrode assembly which is formed by winding a first electrode plate having a first electrode uncoated part, a separator, and a second electrode plate having a second electrode uncoated part, the first electrode uncoated part protruding upwards, and the second electrode uncoated part protruding downwards; and a first current collection plate which is electrically connected to the first electrode uncoated part and has a concave-convex part protruding downwards, wherein the width of the concave-convex part becomes wider from the center of the first current collection plate toward the outer periphery thereof.

Abstract: An electrode assembly includes a first electrode plate coated with a first electrode active material and having a first non-coated part along an upper end thereof, a second electrode plate coated with a second electrode active material and having a second non-coated part, and a separator between the first electrode plate and the second electrode plate, wherein the electrode assembly is wound in a jelly roll shape, wherein the first non-coated part has a structure in which isosceles trapezoidal electrode tabs are adjacent to one another with respective notches therebetween formed at an angle and at intervals from a start point thereof that is closest to a winding axis, such that the electrode tabs are bent toward the winding axis, and wherein respective lengths of the isosceles trapezoidal electrode tabs increase as the electrode tabs get farther away from the winding axis when the electrode assembly is wound.

Abstract: An embodiment of the present invention relates to a secondary battery, and with respect to a technical problem to be resolved, provided is a secondary battery which has an electrode tab provided by forming a notch on a non-coated part of an electrode plate of an electrode assembly, and which can enable a current collecting plate to come into surface contact with the electrode tab.

Abstract: The present invention relates to a secondary battery supporting the center part of an electrode assembly to enhance stability and reliability. For example, disclosed is a secondary battery comprising: an electrode assembly formed by winding a first electrode plate, a separator and a second electrode plate; a case for accommodating the electrode assembly; a current collection plate electrically connected to the first electrode plate and coupled to the upper part of the electrode assembly; and a core insulation member coupled to a winding center of the electrode assembly at the upper part of the current collection plate, wherein the core insulation member includes an insertion part having an inner hole, and a flange part extending in the horizontal direction from the upper end of the insertion part.

Abstract: The present invention relates to a secondary battery in which an electrode assembly and a current collection plate may be easily welded and safety may be improved. As an embodiment, disclosed is a secondary battery comprising: an electrode assembly which is formed by winding a first electrode plate having a first electrode uncoated part, a separator, and a second electrode plate having a second electrode uncoated part, the first electrode uncoated part protruding upwards, and the second electrode uncoated part protruding downwards; and a first current collection plate which is electrically connected to the first electrode uncoated part and has a concave-convex part protruding downwards, wherein the width of the concave-convex part becomes wider from the center of the first current collection plate toward the outer periphery thereof.

Abstract: An embodiment of the present invention relates to a secondary battery, and with respect to a technical problem to be resolved, provided is a secondary battery which has an electrode tab provided by forming a notch on a non-coated part of an electrode plate of an electrode assembly, and which can enable a current collecting plate to come into surface contact with the electrode tab.

Abstract: Disclosed is a secondary battery, which has a reinforced strength and can simplify the manufacturing process thereof. For example, one embodiment provides a secondary battery which comprises: an electrode assembly including a first electrode plate and a second electrode plate, wherein one of the first electrode plate and the second electrode plate includes a plurality of first tabs formed to protrude in one direction; a first current collection tab coupled to the first tabs; a case housing the electrode assembly; and a cap assembly coupled to the upper part of the case, wherein the first current collection tab is coupled to one of the cap assembly and the bottom surface of the case.

Abstract: An embodiment of the present invention relates to a secondary battery, wherein a technical problem to be solved is to provide a secondary battery which has low resistance and can output high power without loss of capacity, and can prevent deformation or cracking of an electrode assembly. To this end, the present invention provides a secondary battery comprising: a cylindrical can; an electrode assembly which is received in the cylindrical can and includes multiple first tabs extending in a first direction which is a longitudinal direction of the cylindrical can, and multiple second tabs extending in a second direction opposite to the first direction; a cap assembly for sealing the cylindrical can; a first current collecting structure which electrically connects the multiple first tabs to the cap assembly while being insulated from the cylindrical can; and a second current collecting structure for electrically connecting the multiple second tabs to the cylindrical can.

Abstract: The present invention relates to a gas distribution unit for a fluidized bed reactor system, a fluidized bed reactor system having the gas distribution unit, and a method for preparing granular polysilicon using the fluidized bed reactor system. The gas distribution unit for a fluidized bed reactor system according to the present invention enables gas flow rate control and gas composition control for each zone within the plenum chamber. In addition, a fluidized bed reactor system having the gas distribution unit enables shape control of a fluidized bed (in particular, transition between a bubbling fluidized bed and a spout fluidized bed). The method for preparing granular polysilicon using the fluidized bed reactor system not only simultaneously improves process stability and productivity, but also enables more flexible handling in the event of an abnormal situation.

Abstract: The present invention relates to a purification method and a purification apparatus for off-gas. More specifically, the present invention relates to a purification method and a purification apparatus for off-gas, capable of lowering the concentration of hydrogen chloride and separating high-purity hydrogen from the off-gas, which is discharged after performing a polysilicon deposition process by a chemical vapor deposition reaction.

Abstract: The present invention relates to a gas distribution unit for a fluidized bed reactor system, a fluidized bed reactor system having the gas distribution unit, and a method for preparing granular polysilicon using the fluidized bed reactor system. The gas distribution unit for a fluidized bed reactor system according to the present invention enables gas flow rate control and gas composition control for each zone within the plenum chamber. In addition, a fluidized bed reactor system having the gas distribution unit enables shape control of a fluidized bed (in particular, transition between a bubbling fluidized bed and a spout fluidized bed). The method for preparing granular polysilicon using the fluidized bed reactor system not only simultaneously improves process stability and productivity, but also enables more flexible handling in the event of an abnormal situation.

Abstract: The present invention relates to a purification method and a purification apparatus for off-gas. More specifically, the present invention relates to a purification method and a purification apparatus for off-gas, capable of lowering the concentration of hydrogen chloride and separating high-purity hydrogen from the off-gas, which is discharged after performing a polysilicon deposition process by a chemical vapor deposition reaction.

Abstract: This disclosure relates to a method for purification of off-gas and a device for the same. More particularly, this disclosure relates to a method for purification of off-gas that removes hydrogen chloride from the off-gas discharged after conducting a polysilicon deposition process by chemical vapor deposition, and can separate hydrogen of high purity, and a device for the same.

Abstract: This invention relates to a method of preparing trichlorosilane, which enables trichlorosilane to be obtained at improved yield using silicon having copper silicide uniformly formed thereon, by uniformly distributing and applying a copper compound on the surface of silicon and then performing heat treatment.

Abstract: The present invention relates to a method for preparing trichlorosilane. According to the method for preparing trichlorosilane of the present invention, trichlorosilane may be obtained with improved yield using silicon where copper silicide is formed.