Abstract: A welding method includes pressing multiple objects together by a jig and irradiating the objects with laser to form multiple welded spots. The welded spots may include multiple first welded spots formed in a first direction and multiple second welded spots formed in the first direction and misaligned with the first welded spots in a second direction which is perpendicular to the first direction. A gap between the center of each of the first welded spots and the center of each of the second welded spots in the second direction. Another gap between the first welded spots in the first direction. And a gap between the second welded spots in the first direction may be greater than or equal to the radius of the second welded spot and less than or equal to a value of about 1 mm plus a diameter of the second welded spot.

Abstract: A method for manufacturing an electrode includes the steps of (a) laminating an active material layer on the surface of the current collector; and (b) removing a portion of the active material layer by irradiating a laser beam on the surface of the active material layer. Before irradiating the active material layer with a laser beam in step (b), a process of supplying moisture to the active material layer is performed. A system for manufacturing an electrode according to the above method is also provided.

Abstract: An electrode sheet machining apparatus including a transfer roller configured to supply an electrode sheet, a drum located in contact with one surface of the supplied electrode sheet, and a laser radiator configured to radiate a laser beam toward the drum is provided. The drum includes a first drum configured to be rotated together with the supplied electrode sheet, a second drum located at a side of the first drum, the second drum, and a pattern jig removably mounted to the second drum, the pattern jig having an opening configured to allow the laser beam to pass therethrough.

Abstract: It is preferred that the foreign material removal device for notching a secondary battery according to one example of the present invention comprises: a foreign material confirmation part provided so that in a transport path of an electrode film through a notching process, the upper and lower surfaces of the notched electrode pattern are photographed, and a position of a foreign material present in the electrode pattern is calculated based on the photographed image; and a foreign material removal process part provided so that air is sprayed to the position of the foreign material and a vacuum pressure is applied thereto according to the foreign material position information calculated by the foreign material confirmation part.

Abstract: A capacitor based on eFlash architecture is provided in the present invention, including a first word line, a second word line and a third word line on a substrate, a continuous first floating gate between the first word line and the second word line, a continuous second floating gate between the second word line and the third word line, multiple first contacts connected on the word lines and multiple second contacts connected on the floating gates, wherein the capacitor is in reflection symmetric with respect to the second word line.

Abstract: A laser etching device, which etches an active material portion on an electrode sheet including the active material portion and a non-coating portion, according to an embodiment of the present invention includes a laser unit configured to irradiate laser onto the active material portion, a blowing unit configured to blow foreign substances generated by the etching of the active material portion toward the non-coating portion, and a suction unit disposed at an opposite side of the blowing unit with the laser unit therebetween to suction the foreign substances, wherein the laser unit, the blowing unit, and the suction unit are disposed in a direction traversing a moving direction of the electrode sheet.

Abstract: A lamination apparatus for a secondary battery comprises a lamination device and a cutting device. The supply unit supplies electrodes disposed on a separation sheet and a bonding unit which bonds the separation sheet and electrodes to manufacture a radical unit sheet. The cutting device cuts the separation sheet of the radical unit sheet to manufacture a radical unit constituted of a separator and the electrodes. The cutting device comprises a transfer conveyor, which transfers the radical unit sheet, a laser cutting unit, which irradiates a laser onto and thereby cuts the separation sheet of the radical unit sheet to manufacture the radical unit, a discharge conveyor, which transfers the radical unit cut by the laser cutting unit, and an adjusting unit which adjusts a speed for cutting the separation sheet passing through the laser cutting unit depending on a spaced distance between the transfer conveyor and the discharge conveyor.

Abstract: A method for manufacturing an electrode for a secondary battery comprises the steps of (a) preparing an electrode sheet comprising a current collector partitioned into a coating portion and a non-coating portion and having an insulating layer laminated on the non-coating portion; and (b) forming an electrode tab by notching the non-coating portion on which the insulating layer is laminated. The notching is performed using a laser having a pulse width of 100 ps to 10?6 ps. An electrode for a secondary battery and an electrode manufacturing system used in the method described above is also provided.

Abstract: One embodiment of the present invention provides an electrode sheet processing method comprising the steps of preparing an electrode sheet having an electrode mixture layer disposed on at least one surface of the electrode current collector; removing a part of the electrode mixture layer in the thickness direction by physical processing; and cutting down the region from which the electrode mixture layer of the electrode sheet is removed.

Abstract: A method for preparing an electrode, includes (a) designating a current collector surface into an active material layer-laminated portion and an active material-nonlaminated portion, and attaching a masking tape to the active material-nonlaminated portion; (b) laminating an active material layer on the masking tape-attached current collector; (c) forming a cutting groove on an upper surface of the active material layer along a boundary of the masking tape at the bottom and the active material; and (d) removing the masking tape along the cutting groove to form the active material-nonlaminated portion, and an electrode in which a corner portion where an upper surface of the active material layer and a side wall surface forming a thickness of the active material layer meet is formed in a right-angled shape.

Abstract: A separator cutting device cuts a sheet-shaped separator with which at least one electrode is laminated. The separator cutting device includes a laser generator configured to emit a laser beam, a scanner configured to control an optical path of the laser beam emitted from the laser generator, and an end mirror configured to reflect the laser beam passing through the scanner toward the separator and disposed at a side of the scanner.

Abstract: It is preferred that the foreign material removal device for notching a secondary battery according to one example of the present invention comprises: a foreign material confirmation part provided so that in a transport path of an electrode film through a notching process, the upper and lower surfaces of the notched electrode pattern are photographed, and a position of a foreign material present in the electrode pattern is calculated based on the photographed image; and a foreign material removal process part provided so that air is sprayed to the position of the foreign material and a vacuum pressure is applied thereto according to the foreign material position information calculated by the foreign material confirmation part.

Abstract: A method for manufacturing an electrode includes the steps of (a) laminating an active material layer on the surface of the current collector; and (b) removing a portion of the active material layer by irradiating a laser beam on the surface of the active material layer. Before irradiating the active material layer with a laser beam in step (b), a process of supplying moisture to the active material layer is performed. A system for manufacturing an electrode according to the above method is also provided.

Abstract: A lamination apparatus for a secondary battery comprises a lamination device and a cutting device. The supply unit supplies electrodes disposed on a separation sheet and a bonding unit which bonds the separation sheet and electrodes to manufacture a radical unit sheet. The cutting device cuts the separation sheet of the radical unit sheet to manufacture a radical unit constituted of a separator and the electrodes. The cutting device comprises a transfer conveyor, which transfers the radical unit sheet, a laser cutting unit, which irradiates a laser onto and thereby cuts the separation sheet of the radical unit sheet to manufacture the radical unit, a discharge conveyor, which transfers the radical unit cut by the laser cutting unit, and an adjusting unit which adjusts a speed for cutting the separation sheet passing through the laser cutting unit depending on a spaced distance between the transfer conveyor and the discharge conveyor.

Abstract: A welding method includes pressing multiple objects together by a jig and irradiating the objects with laser to form multiple welded spots. The welded spots may include multiple first welded spots formed in a first direction and multiple second welded spots formed in the first direction and misaligned with the first welded spots in a second direction which is perpendicular to the first direction. A gap between the center of each of the first welded spots and the center of each of the second welded spots in the second direction. Another gap between the first welded spots in the first direction. And a gap between the second welded spots in the first direction may be greater than or equal to the radius of the second welded spot and less than or equal to a value of about 1 mm plus a diameter of the second welded spot.

Abstract: The present invention relates to a multipurpose water bottle, which comprises: a water bottle main body having a reception space for receiving a liquid therein; and a cap coupled to an upper part of the water bottle main body to discharge the liquid to the outside, wherein the cap comprises: a main body coupling tube coupled to a cap coupling tube disposed at the upper part of the water bottle main body; a liquid discharge tube disposed at an upper part of the main body coupling tube to discharge the liquid to the outside; and an inner coupling tube disposed inside the main body coupling tube and coupled to a first discharge port of a first kind of water bottle, which is received in the reception space of the water bottle main body, to guide, to the liquid discharge tube, a first auxiliary liquid which has been received in the first kind of water bottle.

Abstract: The present invention relates to a multipurpose water bottle, which comprises: a water bottle main body having a reception space for receiving a liquid therein; and a cap coupled to an upper part of the water bottle main body to discharge the liquid to the outside, wherein the cap comprises: a main body coupling tube coupled to a cap coupling tube disposed at the upper part of the water bottle main body; a liquid discharge tube disposed at an upper part of the main body coupling tube to discharge the liquid to the outside; and an inner coupling tube disposed inside the main body coupling tube and coupled to a first discharge port of a first kind of water bottle, which is received in the reception space of the water bottle main body, to guide, to the liquid discharge tube, a first auxiliary liquid which has been received in the first kind of water bottle.