Abstract: The present invention relates to a method for quantifying and diagnosing the quality of manufacturing equipment, that is, to a quantitative diagnostic method for the quality of manufacturing equipment. It is possible to quantify the quality of manufacturing equipment having a plurality of production elements and diagnose same in a single attempt.

Abstract: The present technology relates to an electrode manufacturing method, an electrode manufactured by the method, and a secondary battery comprising same, the electrode manufacturing method comprising a cleaning step performed by laser irradiation, in lines corresponding to each other in a direction perpendicular to an electrode current collector, onto a top-coated electrode mixture layer and a back-coated electrode mixture layer of the electrode current collector, and may prevent a mismatch of the electrode mixture layers and may significantly reduce the degree of sliding occurrence at the boundary region.

Abstract: A method of preparing an electrode for an electrode assembly having a structure in which electrodes are laminated, including: (i) a process of coating an electrode mixture on at least one surface of a metal sheet so that n (n?2) electrode mixture coated layer lines are formed between non-coated portions parallel to a first direction; (ii) a process of rolling the metal sheet sequentially from a first electrode mixture coated layer line to an nth electrode mixture coated layer line using a rolling roller rotated in a second direction perpendicular to the first direction; (iii) a process of slitting the rolled metal sheet at least twice in the second direction to prepare electrode plate base materials having n electrode mixture coated layers formed thereon; and (iv) a process of cutting each of the electrode plate base materials in the first direction to obtain n single sheet electrodes.

Abstract: The present invention relates to a method for cutting a separation membrane for a battery, in which the separation membrane is cut by laser radiation on the separation membrane, wherein the pulse repetition rate of the laser is 10 to 500 kHz; a separation membrane manufactured by the method; and a battery comprising the separation membrane. The present invention, in contrast with physical cutting, has the advantage of being capable of cutting a separation membrane for a battery so as to have a uniform cut surface, which was impossible by conventional physical cutting methods.

Abstract: The present invention discloses a method of manufacturing an electrode for a secondary battery by using a single process to notch and cut a unit electrode from an electrode sheet. The method for manufacturing electrodes for a secondary battery includes supplying an electrode sheet in a moving direction (MD), wherein the electrode sheet has a plurality of coated portions and uncoated portions alternately arranged along the MD, wherein each coated portion has an electrode active material, and each uncoated portion does not have an electrode active material; and cutting the uncoated portions to form the plurality of unit electrodes.

Abstract: Disclosed herein is a method of sealing a side portion of a pouch-shaped battery including an electrode current collector and a pouch-shaped battery case, the method including bending a lower case and an upper case connected to the lower case such that the upper case faces the lower case and the electrode current collector is disposed in the lower case, the lower case and the upper case being connected to one another at a bent portion of the pouch-shaped battery case, a primary sealing step of sealing the lower end part of the side portion of the pouch-shaped battery case adjacent to the bent portion of the pouch-shaped battery case, and a secondary sealing step of sealing the entirety of the side portion of the pouch-shaped battery case.

Abstract: The present invention relates to an electrode manufacturing method, an electrode manufactured thereby, and a battery comprising the same, the electrode manufacturing method comprising the steps of: applying an electrode active material onto a collector; and radiating a laser such that the end of an electrode active material layer, which has been obtained by applying the electrode active material, becomes straight, thereby removing the electrode active material. The present invention is advantageous in that the difference in area between active materials applied to the positive and negative electrodes, respectively, is minimized, thereby increasing the capacity and improving the stability of the battery.

Abstract: Disclosed herein is a method of sealing a side portion of a pouch-shaped battery including an electrode current collector and a pouch-shaped battery case, the method including bending a lower case and an upper case connected to the lower case such that the upper case faces the lower case and the electrode current collector is disposed in the lower case, the lower case and the upper case being connected to one another at a bent portion of the pouch-shaped battery case, a primary sealing step of sealing the lower end part of the side portion of the pouch-shaped battery case adjacent to the bent portion of the pouch-shaped battery case, and a secondary sealing step of sealing the entirety of the side portion of the pouch-shaped battery case.

Abstract: The present invention discloses a method of manufacturing an electrode for a secondary battery by using a single process to notch and cut a unit electrode from an electrode sheet. The method for manufacturing electrodes for a secondary battery includes supplying an electrode sheet in a moving direction (MD), wherein the electrode sheet has a plurality of coated portions and uncoated portions alternately arranged along the MD, wherein each coated portion has an electrode active material, and each uncoated portion does not have an electrode active material; and cutting the uncoated portions to form the plurality of unit electrodes.

Abstract: A method of preparing an electrode for an electrode assembly having a structure in which electrodes are laminated, including: (i) a process of coating an electrode mixture on at least one surface of a metal sheet so that n (n?2) electrode mixture coated layer lines are formed between non-coated portions parallel to a first direction; (ii) a process of rolling the metal sheet sequentially from a first electrode mixture coated layer line to an nth electrode mixture coated layer line using a rolling roller rotated in a second direction perpendicular to the first direction; (iii) a process of slitting the rolled metal sheet at least twice in the second direction to prepare electrode plate base materials having n electrode mixture coated layers formed thereon; and (iv) a process of cutting each of the electrode plate base materials in the first direction to obtain n single sheet electrodes.

Abstract: The present invention relates to a lithium secondary battery, and more specifically to a lithium secondary battery having a multi-directional lead-tab structure. The lithium secondary battery of the present invention includes: an electrode assembly which is formed by alternately laminating an electrode plate having a current collector, an active material, and a tab, and an isolation layer; a lead which is electrically connected to the tab; and a battery case, wherein the lead is divided into an anode lead and a cathode lead, and at least two or more anode leads and cathode leads are provided. The battery of the present invention uses the same lead-tab size as the prior art and is suitable for use with high current.

Abstract: The present invention relates to an electrode manufacturing method, an electrode manufactured thereby, and a battery comprising the same, the electrode manufacturing method comprising the steps of: applying an electrode active material onto a collector; and radiating a laser such that the end of an electrode active material layer, which has been obtained by applying the electrode active material, becomes straight, thereby removing the electrode active material. The present invention is advantageous in that the difference in area between active materials applied to the positive and negative electrodes, respectively, is minimized, thereby increasing the capacity and improving the stability of the battery.

Abstract: The present invention relates to a method for cutting a separation membrane for a battery, in which the separation membrane is cut by laser radiation on the separation membrane, wherein the pulse repetition rate of the laser is 10 to 500 kHz; a separation membrane manufactured by the method; and a battery comprising the separation membrane. The present invention, in contrast with physical cutting, has the advantage of being capable of cutting a separation membrane for a battery so as to have a uniform cut surface, which was impossible by conventional physical cutting methods.