Abstract: A current interrupt structure in which a double rupture structure, which has a rupture groove with a triangular shape and a rupture line with an extending shape of a triangular groove, such that when a swelling phenomenon occurs, stress is concentrated on the rupture line by the rupture groove, which enables accurate and smooth rupture and current flow interruption.

Abstract: Disclosed is a terminal cover, which covers a terminal of a battery pack and is detachably mounted to the battery pack. The terminal cover includes a cover body coupled to a pack case of the battery pack by hook coupling, and a detachment guide unit provided at both side surfaces of the cover body to allow the hook coupling of the cover body to be released based on pressing by a user.

Abstract: Provided is a battery module. The battery module includes: a first cooling pipe; a second cooling pipe connected to the first cooling pipe and arranged on a different plane than the first cooling pipe; and a branch unit connecting the first cooling pipe and second cooling pipe, wherein the branch unit includes: a lower connection pipe connected to the first cooling pipe; an upper connection pipe connected to the second cooling pipe; and a connection member into which one of the lower connection pipe and the upper connection pipe is inserted and which is inserted into the other one of the lower connection pipe and the upper connection pipe.

Abstract: A positive electrode includes a positive electrode current collector, and a positive electrode active material layer that is provided on the positive electrode current collector and that includes a positive electrode active material, a conductive auxiliary agent, and a binder. A surface of the positive electrode active material layer has a reflectance Rc in a range of 2.0?Rc?12.0% at a wavelength of 550 nm. A lithium ion secondary battery includes: the positive electrode; a negative electrode including a negative electrode current collector and a negative electrode active material layer that is provided on the negative electrode current collector and that includes a negative electrode active material; a separator; and a nonaqueous electrolyte solution. A surface of the negative electrode active material layer has a reflectance Ra in a range of 7.5?Ra?16.0% at a wavelength of 550 nm.

Abstract: A lithium secondary battery according to the present disclosure comprises a cathode, an anode; and a non-aqueous electrolyte having lithium ion conductivity. A lithium metal is precipitated on a surface of the anode during charge of the lithium secondary battery. The lithium metal is dissolved from the surface of the anode in the non-aqueous electrolyte during discharge of the lithium secondary battery. The non-aqueous electrolyte contains a solvent and a lithium salt. The lithium salt includes a first lithium salt and a second lithium salt. The second lithium salt is different from the first lithium salt. The first lithium salt is composed of a lithium ion and an ate complex anion. A sum of concentration of the first lithium salt and the second lithium salt which are contained in the non-aqueous electrolyte is not less than 3.0 mol/L.

Abstract: Disclosed is an electronic device according to an embodiment of the disclosure that includes a battery and a battery mounting part that receives the battery therein, in which the battery mounting part includes a base and at least one side surface extending from an edge of the base and a recess area is formed in at least a partial area of the at least one side surface. Besides, it may be permissible to prepare various other embodiments speculated through the specification.