Abstract: A connection structure of a stator of a drive motor is configured to allow coils to be wound in a plurality of slots provided in a stator core and to connect the coils withdrawn from the slots. The coils are wound in the slots to form first-type structures and second-type structures configured such that withdrawal directions of three-phase (U-, W- and V-phase) withdrawal lines and N-phase withdrawal lines withdrawn from the slots of the first-type structures are opposite to withdrawal directions of three-phase (U-, W- and V-phase) withdrawal lines and N-phase withdrawal lines withdrawn from the slots of the second-type structures. The first-type structures and the second-type structures are disposed symmetrically to each other with respect to a reference line formed to divide the slots in half.

Abstract: Description according to the present disclosure relates to an apparatus for inspecting a welding tip of a spot welding gun, and more particularly, to an apparatus for inspecting a welding tip of a spot welding gun, the apparatus enabling a user to replace a camera module swiftly and conveniently.

Abstract: Description according to the present disclosure relates to an apparatus for inspecting a welding tip of a spot welding gun, and more particularly, to an apparatus for inspecting a welding tip of a spot welding gun, the apparatus enabling a user to replace a camera module swiftly and conveniently.

Abstract: The present disclosure relates to a projection welding machine, and more particularly, to a projection welding machine for avoiding an accident in which an operator's hand gets caught between an upper electrode unit and a lower electrode unit, and preventing a fault in welding operation from occurring due to incorrect seating of a nut on the lower electrode unit.

Abstract: A positive active material for a rechargeable lithium battery includes a positive active material compound including a metal compound for intercalating and deintercalating lithium, a coating particle having an embedded portion embedded into the active material compound and a protruding portion protruding from the surface of the active material, and a rechargeable lithium battery including the positive active material.

Abstract: The present invention discloses methods and apparatus for increasing inspection efficiency and reducing time for analyzing an image when inspecting contamination and alignment of the welding tip of the spot welding gun. An apparatus for inspecting a welding tip according to some embodiments of the present invention is configured to inspect the contamination and the alignment of the welding tip based on an end-surface image and a profile image of the welding tip. In particular, when recording the welding tip through an internal housing arranged in an internal space of an external housing, the noise generated from an external light source can be blocked, and hence the contamination and the alignment of the welding tip can be inspected by using a clearer image, thus improving the accuracy of the inspection.

Abstract: An electrode active material for a lithium secondary battery, a method of preparing the electrode active material, an electrode for a lithium secondary battery which includes the same, a lithium secondary battery using the electrode. The electrode active material includes a core active material and a coating layer including magnesium aluminum oxide (MgAlO2) and formed on the core active material. 1s binding energy peaks of oxygen (O) in the electrode active material measured by x-ray photoelectron spectroscopy (XPS) are shown at positions corresponding to 529.4±0.5 eV, about 530.7 eV, and 531.9±0.5 eV, and a peak intensity at the position corresponding to 529.4±0.5 eV is stronger than a peak intensity at the position corresponding to about 530.7 eV.

Abstract: In an aspect, a rechargeable lithium battery that includes a positive electrode including a composite positive active material; a negative electrode including a carbon-based negative active material; an electrolyte including an additive, and a lithium salt and an organic solvent, wherein a passivation film may be on a surface of the negative electrode of the rechargeable lithium battery.

Abstract: In an aspect, a rechargeable lithium battery that includes a positive electrode; negative electrode; a separator interposed between the positive electrode and the negative electrode and including a porous substrate and a coating layer formed on at least one side of the porous substrate; and an electrolyte including a lithium salt, a non-aqueous organic solvent, and an additive is provided.

Abstract: An electrolyte for a rechargeable lithium battery including a lithium salt, a non-aqueous organic solvent, and an additive, wherein the additive includes a compound represented by Chemical Formula 1 and a rechargeable lithium battery including the same.

Abstract: An organic electrolyte solution and a lithium battery using the same are disclosed. The organic electrolyte solution includes a lithium salt, an organic solution, a thiophene-based compound and a nitrile-based compound.

Abstract: An additive, the additive being for an electrolyte for a lithium secondary battery and represented by Chemical Formula 1: R1 to R4 each independently being hydrogen or a non-polar hydrocarbon group, is disclosed. An electrolyte, the electrolyte being for a lithium secondary battery and including: a non-aqueous organic solvent; a lithium salt; and the additive is also disclosed. A lithium secondary battery including: a positive electrode; a negative electrode facing the positive electrode; and a separator between the positive electrode and the negative electrode, the separator being impregnated with an electrolyte including the additive, is also disclosed.

Abstract: Disclosed is a solid electrolyte including particles comprising Li(1+x)Ti(2-x)Alx(PO4)3 (0?x?1) having a true density of about 2.20 to about 2.50 g/cm3.

Abstract: In an aspect, a rechargeable lithium battery that includes a positive electrode; negative electrode; a separator interposed between the positive electrode and the negative electrode and including a porous substrate and a coating layer formed on at least one side of the porous substrate; and an electrolyte including a lithium salt, a non-aqueous organic solvent, and an additive is provided.

Abstract: Disclosed is an electrolyte for a rechargeable lithium battery including an organic solvent; a lithium salt; a flame retardant; and at least one acrylate compound having a fluorinated alkyl group. The electrolyte for a rechargeable battery may provide a rechargeable lithium battery having flame-retardant characteristics without decrease of cycle-life and battery performance.

Abstract: An electrolyte additive represented by the following Chemical Formula 1, an electrolyte, and a rechargeable lithium battery are disclosed: In Chemical Formula 1, R1 to R3 and L1 to L3 are the same as defined in the detailed description.

Abstract: An electrolyte for a rechargeable lithium battery that includes a lithium salt and a non-aqueous organic solvent, wherein the non-aqueous organic solvent includes a fluoro-based solvent represented by the following Chemical Formula 1, and a rechargeable lithium battery including the same. R—O—R???Chemical Formula 1 In Chemical Formula 1, R and R? are independently a substituted or unsubstituted C1 to C6 alkyl group, or a substituted or unsubstituted C1 to C6 fluoroalkyl group, wherein at least one of R and R? is the substituted or unsubstituted C1 to C6 fluoroalkyl group, and a substitution ratio of fluoro in the fluoro-based solvent represented by the Chemical Formula 1 may range from more than about 0% to less than or equal to about 50%.

Abstract: The present invention discloses methods and apparatus for increasing inspection efficiency and reducing time for analyzing an image when inspecting contamination and alignment of the welding tip of the spot welding gun. An apparatus for inspecting a welding tip according to some embodiments of the present invention is configured to inspect the contamination and the alignment of the welding tip based on an end-surface image and a profile image of the welding tip. In particular, when recording the welding tip through an internal housing arranged in an internal space of an external housing, the noise generated from an external light source can be blocked, and hence the contamination and the alignment of the welding tip can be inspected by using a clearer image, thus improving the accuracy of the inspection.

Abstract: A positive active material for a rechargeable lithium battery, a method of manufacturing the same, and a rechargeable lithium battery using the same, the positive active material including a secondary particle formed of a plurality of primary particles, the primary particles being made of a metal compound capable of intercalating/deintercalating lithium; and a coating layer on a surface of the secondary particle in an island arrangement, the coating layer including a metal oxide, wherein the secondary particle includes pores formed by the primary particles, the pores including a surface pore on the surface of the secondary particle and an internal pore inside the secondary particle, and the metal oxide of the coating layer fills a portion of the surface pore of the secondary particle.

Abstract: Disclosed is a separator having surface energy of about 45 mN to about 50 mN/m which can be prepared by radiating plasma on a polymer film under a current of from about 1800 mA to about 2000 mA and electric power of from about 2750 W to about 3000 W. Further disclosed is a rechargeable battery comprising the separator having a surface energy of about 45 mN to about 50 mN/m.