Abstract: An electrode assembly manufacturing method according to the present disclosure uses a pre-compressed separator substrate. Therefore, a reduction in thickness of the separator by the pressure applied in a lamination process during the manufacture of an electrode assembly is small. For this reason, the separator of the electrode assembly manufactured by the method exhibits high insulation performance and does not experience a decrease in dielectric breakdown voltage. In addition, even though high pressure is applied during the lamination process, damage to the separator is small, and the processing speed is fast, resulting in process efficiency.

Abstract: A cylindrical secondary battery and a method for manufacturing the same are provided. The cylindrical secondary battery includes a negative electrode having no negative electrode active material layer, and thus a large-scale cylindrical secondary battery having a high energy density, improved cell performance, and ensured safety can be provided.

Abstract: An electrode assembly, a cylindrical lithium-sulfur battery cell including the same, and a battery pack and a vehicle including the cylindrical lithium-sulfur battery cell are provided. The electrode assembly is a jelly roll type electrode assembly having a structure in which a positive electrode plate, a negative electrode plate, and a separator therebetween are wound in one direction and having a center hole formed therein, and includes a center pin that is inserted in the center hole to press the electrode assembly.

Abstract: The present disclosure relates to an electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same.

Abstract: A separator for an electrochemical device having a low content of secondary particles formed by aggregation of inorganic particles in the inorganic coating layer. The separator has a low content of secondary particles protruding from the separator surface to a predetermined height. Since the inorganic particles are not aggregated but are distributed homogeneously in the inorganic coating layer, the separator has uniform dispersion of pressure over the whole surface of the separator, when it is applied to a battery and pressure is generated in the battery due to the charge/discharge of the battery. Deformation of the separator is minimized. When using a porous film as a separator substrate, there is a low tendency for intensive application of pressure from the secondary particles to a local site of the separator substrate, and thus the separator substrate is less damaged and the possibility of short-circuit generation is reduced.

Abstract: A method for manufacturing unit cells includes preparing a pre-cell having a first separator sheet and a plurality of first electrodes disposed on the first separator sheet while being spaced apart from one another; forming a cutting guide line having a plurality of though-holes spaced apart from one another on the pre-cell; and cutting the pre-cell along the cutting guide line to form a plurality of unit cells. An apparatus for manufacturing unit cells includes a hole-forming unit configured to form a cutting guide line on a pre-cell having a separator sheet and electrodes disposed on the separator sheet where the cutting guide line has a plurality of though-holes spaced apart from one another; and a cutting unit configured to cut the pre-cell along the cutting guide line to form a plurality of unit cells.

Abstract: The present disclosure relates to a coating bar and a method for manufacturing a separator using the same. The coating bar according to the present disclosure may form a coating layer having an area with different thicknesses by one coating. Additionally, the method for manufacturing a separator according to the present disclosure includes forming a porous coating layer using a predetermined coating bar, to manufacture a separator including the porous coating layer having an area with different thicknesses. In particular, the present disclosure manufactures the separator having a larger thickness at the two ends than at the center, thereby avoiding a lack of adhesive strength at the two ends in a transverse direction in the adhesion between the separator and the electrode, and exhibiting uniform adhesive strength over the whole interface between the separator and the electrode.

Abstract: Disclosed is a separator including a separator substrate and an inorganic coating layer disposed on at least one surface of the substrate, wherein a concave pattern portion having a concave pattern is applied merely at the outer circumferential end of the separator substrate. The separator may show excellent resistance characteristics, while ensuring high binding force between the separator substrate and the inorganic coating layer by virtue of such a structural feature. In addition, in the electrochemical device including the separator, the concave pattern portion at the outer circumferential end of the separator is disposed in such a manner that it may be overlapped with the tab portion of an electrode, when the separator is applied to an electrode assembly. In this manner, it is possible to prevent lithium plating.

Abstract: The present disclosure relates to a coating bar and a method for manufacturing a separator using the same. The coating bar according to the present disclosure may form a coating layer having an area with different thicknesses by one coating. Additionally, the method for manufacturing a separator according to the present disclosure includes forming a porous coating layer using a predetermined coating bar, to manufacture a separator including the porous coating layer having an area with different thicknesses. In particular, the present disclosure manufactures the separator having a larger thickness at the two ends than at the center, thereby avoiding a lack of adhesive strength at the two ends in a transverse direction in the adhesion between the separator and the electrode, and exhibiting uniform adhesive strength over the whole interface between the separator and the electrode.

Abstract: A separator for an electrochemical device, including a porous substrate, and a porous coating layer on at least one surface of the porous substrate. The porous coating layer includes a binder polymer and an inorganic filler, and satisfies Formula 1 of 20?[amount of inorganic filler (wt %)×BET surface area of inorganic filler (m2/g)]/[amount of binder polymer (wt %)]?30, wherein the amount of binder polymer and the amount of inorganic filler are based on 100 wt % of the total weight of the porous coating layer.) The separator ensures the safety of the electrochemical device, while providing improved adhesion between the porous substrate and the porous coating layer of the separator and improved adhesion to an electrode, thereby achieving improved heat resistance and stability.

Abstract: A method for manufacturing unit cells includes preparing a pre-cell having a first separator sheet and a plurality of first electrodes disposed on the first separator sheet while being spaced apart from one another; forming a cutting guide line having a plurality of though-holes spaced apart from one another on the pre-cell; and cutting the pre-cell along the cutting guide line to form a plurality of unit cells. An apparatus for manufacturing unit cells includes a hole-forming unit configured to form a cutting guide line on a pre-cell having a separator sheet and electrodes disposed on the separator sheet where the cutting guide line has a plurality of though-holes spaced apart from one another; and a cutting unit configured to cut the pre-cell along the cutting guide line to form a plurality of unit cells.

Abstract: A separator for an electrochemical device, an electrode assembly and secondary battery including the same, and a method of manufacturing the separator. The separator for an electrochemical device includes a porous polymer substrate; and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer includes a binder polymer and inorganic particles. The separator has a central portion and two end portions. The thickness of the separator at the two end portions in the transverse direction (TD) is larger than the thickness of the separator at the central portion in the TD. The separator prevents generation of a deficiency in adhesion at the two end portions in the TD upon the adhesion of the separator with the electrodes and has uniform adhesion by controlling the thickness of the two end portions of the separator in the TD.

Abstract: A separator for a secondary battery, including: a porous polymer substrate having a first and a second surface; a first coating layer on the first surface of the porous polymer substrate, wherein the first coating layer includes a plurality of inorganic particles and a first binder polymer; a second coating layer on the second surface of the porous polymer substrate, wherein the second coating layer includes a plurality of inorganic particles and the first binder polymer; and a third coating layer between the porous polymer substrate and the first coating layer, and/or between the porous polymer substrate and the second coating layer, wherein the third coating layer includes a second binder polymer. The second binder polymer includes a non-wetting polymer. The present disclosure also relates to a method for manufacturing the separator and a secondary battery including the separator.

Abstract: A separator that includes a porous polymer substrate, a first porous coating layer and a second porous coating layer. First inorganic particles contained in the first porous coating layer have a lower hardness as compared to the second inorganic particles contained in the second porous coating layer. Since the separator is provided with at least two porous coating layers including inorganic particles having a different hardnesses, it is possible to increase the dielectric breakdown voltage, and thus to provide a battery with improved safety. It is also possible to reduce deformation of the separator caused by heat or pressure.

Abstract: An electrode assembly manufacturing method according to the present disclosure uses a pre-compressed separator substrate. Therefore, a reduction in thickness of the separator by the pressure applied in a lamination process during the manufacture of an electrode assembly is small. For this reason, the separator of the electrode assembly manufactured by the method exhibits high insulation performance and does not experience a decrease in dielectric breakdown voltage. In addition, even though high pressure is applied during the lamination process, damage to the separator is small, and the processing speed is fast, resulting in process efficiency.

Abstract: A method and apparatus for manufacturing a separator, and a separator obtained thereby. The method for manufacturing a separator includes applying a solvent for pore impregnation onto a first surface of a porous polymer substrate, before applying slurry for forming a first porous coating layer and a second porous coating layer. In this manner, it is possible to provide a separator which has a small deviation in physical properties between the porous coating layers on the first surface and the second surface of the porous polymer substrate. The present disclosure relates to a method and apparatus for manufacturing a separator, and a separator obtained thereby. The method for manufacturing a separator according to an embodiment of the present disclosure includes applying a solvent for pore impregnation onto a porous polymer substrate, before applying slurry for forming a porous coating layer thereto.

Abstract: A separator for an electrochemical device including a porous polymer substrate; and a porous coating layer formed on at least one surface of the porous polymer substrate, wherein the porous coating layer comprises inorganic particles and a binder polymer positioned on at least a part of a surface of individual inorganic particles to connect and fix the inorganic particles with one another. The binder polymer comprises a first block having repeating units and a second block having repeating units. A method for manufacturing the same is also provided. The separator shows low resistance, improved adhesion to an electrode and improved swelling property with a solvent.

Abstract: A separator for an electrochemical device having a low content of secondary particles formed by aggregation of inorganic particles in the inorganic coating layer. The separator has a low content of secondary particles protruding from the separator surface to a predetermined height. Since the inorganic particles are not aggregated but are distributed homogeneously in the inorganic coating layer, the separator has uniform dispersion of pressure over the whole surface of the separator, when it is applied to a battery and pressure is generated in the battery due to the charge/discharge of the battery. Deformation of the separator is minimized. When using a porous film as a separator substrate, there is a low tendency for intensive application of pressure from the secondary particles to a local site of the separator substrate, and thus the separator substrate is less damaged and the possibility of short-circuit generation is reduced.

Abstract: A separator for an electrochemical device including a porous polymer substrate; and a porous coating layer formed on at least one surface of the porous polymer substrate, wherein the porous coating layer comprises inorganic particles and a binder polymer positioned on at least a part of a surface of individual inorganic particles to connect and fix the inorganic particles with one another. The binder polymer comprises a first block having repeating units and a second block having repeating units. A method for manufacturing the same is also provided. The separator shows low resistance, improved adhesion to an electrode and improved swelling property with a solvent.

Abstract: A separator that includes a porous polymer substrate, a first porous coating layer and a second porous coating layer. First inorganic particles contained in the first porous coating layer have a lower hardness as compared to the second inorganic particles contained in the second porous coating layer. Since the separator is provided with at least two porous coating layers including inorganic particles having a different hardnesses, it is possible to increase the dielectric breakdown voltage, and thus to provide a battery with improved safety. It is also possible to reduce deformation of the separator caused by heat or pressure.