Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery, which includes a compound capable of suppressing an electrolyte solution side reaction in a high-temperature and high-voltage environment, and a lithium secondary battery in which cycle characteristics and stability are improved even during high-temperature and high-voltage charging by including the same.

Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery which includes a compound acting as a HF scavenger, and a lithium secondary battery in which cycle life characteristics and high-temperature storage characteristics are improved by including the same.

Abstract: The present invention relates to an additive for a non-aqueous electrolyte solution, which may suppress the generation of metallic foreign matter causing a side effect in a battery while forming a stable film on the surface of an electrode, a non-aqueous electrolyte solution for a lithium secondary battery which includes the additive, and a lithium secondary battery including the non-aqueous electrolyte solution.

Abstract: The present invention relates to: a non-aqueous electrolyte additive comprising, as a substituent, at least one cyano group and/or at least one fluorine element; a non-aqueous electrolyte for a lithium secondary battery, comprising the same; and a lithium secondary battery including the non-aqueous electrolyte.

Abstract: A lithium secondary battery includes a cathode, an anode, a separator interposed between the cathode and the anode, and a non-aqueous electrolyte solution obtained by dissolving lithium salt in a non-aqueous solvent. The separator includes a porous substrate having pores; and a porous coating layer located on at least one surface of the porous substrate and having inorganic particles and a binder polymer, the inorganic particles being connected and fixed to each other by means of the binder polymer, the porous coating layer having pores therein formed by interstitial volumes among the inorganic particles. The non-aqueous electrolyte solution has a viscosity of 1.4 cP or above at 25° C. This lithium secondary battery gives improved safety and excellent charging/discharging characteristics due to a low risk of leakage of a non-aqueous electrolyte solution and good wettability of separator with the solvent.

Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte solution for a lithium secondary battery which includes a fluorine-containing compound capable of forming a stable film on the surface of an electrode as an additive, and a lithium secondary battery including the same.

Abstract: A hybrid electric vehicle and a driving mode control method are provided to prevent overheating of an electric motor. The hybrid electric vehicle is chargeable using external power. The method includes collecting forward driving information when a state of charge of a battery is equal to or greater than a first value and calculating a driving load for each section based on the forward driving information. A risk of overheating of an electric motor is predicted using the calculated driving load. The vehicle is driven in a first mode using drive power of an engine in a section in which the predicted risk of overheating is greater than a second value and in a second mode using drive power of the electric motor in a section in which the predicted risk of overheating is equal to or less than a preset value.

Abstract: Provided are a lithium secondary battery including a cathode, an anode, a separator, and a gel polymer electrolyte, wherein i) the anode includes a silicon (Si)-based anode active material, ii) the gel polymer electrolyte is formed by polymerizing a composition that includes a monomer having a functional group bondable to metal ions, and iii) a charge voltage of the battery is in a range of 3.0 V to 5.0 V. Since the lithium secondary battery of the present invention may prevent the movement of metal ions dissolved from a cathode to an anode or reduce the precipitation of metal on the anode, the lifetime of the battery may not only be improved but capacity characteristics of the battery may also be excellent even in the case in which the battery is charged at a high voltage as well as normal voltage.

Abstract: Provided is a method of preparing a lithium secondary battery which may simultaneously improve output characteristics and lifetime characteristics of the lithium secondary battery by preparing an electrode on which an SEI film is formed through a pretreatment process, putting an electrode assembly including the electrode in a battery case, and injecting an electrolyte thereinto.

Abstract: The present invention relates to an additive for a non-aqueous electrolyte solution, which has an excellent effect of adsorbing metal ions dissolved from a positive electrode, a non-aqueous electrolyte solution for a lithium secondary battery including the same, and a lithium secondary battery including the non-aqueous electrolyte solution.

Abstract: Disclosed are: a non-aqueous electrolyte for a lithium secondary battery containing 1-20 parts by weight of a cyano group-containing pyrimidine-based compound on the basis of 100 parts by weight of an organic solvent; and a lithium secondary battery comprising the same.

Abstract: The present invention may improve the lifetime characteristics of a lithium secondary battery, and particularly, may provide a non-aqueous electrolyte solution or cathode including a phosphate-based compound which may exhibit stable and excellent lifetime characteristics at high temperature and high voltage regardless of the moisture content or the presence of a pressing process of the electrode.

Abstract: Provided are a lithium secondary battery including a cathode, an anode, a separator, and a gel polymer electrolyte, wherein the gel polymer electrolyte includes an acrylate-based polymer and a charge voltage of the battery is in a range of 4.3 V to 5.0 V, and a method of preparing the lithium secondary battery. A high-voltage lithium secondary battery of the present invention has excellent capacity characteristics at a high voltage of 4.3 V or more.

Abstract: A hybrid electric vehicle which may effectively determine a point in time of shift pattern change and a method of controlling a shift pattern therefor are disclosed. The method includes determining whether or not a request for shift pattern change is received, determining HEV mode related conditions, in response to a determination that the request for shift pattern change is received, and changing a shift pattern according to the request for shift pattern change, in response to a determination that the HEV mode related conditions are satisfied.

Abstract: Disclosed is a lithium secondary battery including a positive electrode, a negative electrode, a separator and a nonaqueous electrolyte, wherein the positive electrode includes LiaNixMnyCozO2 (a+x+y+z=2, 0.9?a?1.1, 0?x, 0?y, 0?z) as a positive electrode active material, and wherein the nonaqueous electrolyte includes (i) fluorinated cyclic carbonate expressed by Chemical Formula 1 below, (ii) propionate-based ester expressed by Chemical Formula 2 below, and (iii) non-halogenated carbonate, so that a mixture weight ratio (i:ii) thereof is 20:80 to 50:50: wherein, in Chemical Formula 1, R1, R2, R3 and R4 are independently any one of F, H and methyl group, and at least one thereof is F, wherein, in Chemical Formula 2, R5 is alkyl group having 1 to 5 carbons.

Abstract: The present invention may improve the lifetime characteristics of a lithium secondary battery, and particularly, may provide a non-aqueous electrolyte solution or cathode including a phosphate-based compound which may exhibit stable and excellent lifetime characteristics at high temperature and high voltage regardless of the moisture content or the presence of a pressing process of the electrode.

Abstract: The present invention relates to an additive for a non-aqueous electrolyte solution which may improve overcharge safety, a non-aqueous electrolyte solution for a lithium secondary battery including the same, and a lithium secondary battery including the non-aqueous electrolyte solution.

Abstract: The present invention relates to a non-aqueous electrolyte additive, and a non-aqueous electrolyte for a lithium secondary battery including the same and a lithium secondary battery, and particularly, to a non-aqueous electrolyte additive having a nitrile group and a propargyl group, and a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery, which include the non-aqueous electrolyte additive so that capacity and cycle lifespan characteristics at high temperature can be improved.

Abstract: The present invention relates to a method of preparing a secondary battery which includes providing a film layer, which includes a first solvent having a melting temperature of 25° C. or more and a viscosity of 1.5 cP or more, between a separator and an electrode (step 1), preparing an electrode assembly by using the electrode, the film layer, and the separator (step 2), and accommodating the electrode assembly in a case, injecting an injection solution including a second solvent, and sealing the case (step 3), and a secondary battery prepared by the method. According to the method of preparing a secondary battery of the preset invention, since electrolyte solution impregnability may be improved, performance and safety of the secondary battery may be further improved.

Abstract: The present invention relates to: a non-aqueous electrolyte additive comprising, as a substituent, at least one cyano group and/or at least one fluorine element; a non-aqueous electrolyte for a lithium secondary battery, comprising the same; and a lithium secondary battery including the non-aqueous electrolyte.