8results about How to "Lower initial resistance" patented technology

According to an exemplary embodiment, there may be provided an electrolyte solution for a lithium secondary battery, the electrolyte solution for a lithium secondary battery comprising: an additive comprising a compound represented by a specific chemical formula; an organic solvent; and a lithium salt. Therefore, a lithium secondary battery including the electrolyte solution for a lithium secondary battery can provide excellent high-temperature characteristics and other properties (e.g., initial resistance, fast charging performance, normal-temperature capacity characteristics, etc.

The present invention relates to a positive electrode active material containing a lithium transition metal oxide having a nickel content of 70 mol% or more with respect to all metals other than lithium, in which EELS analysis results of particle surfaces satisfy relational expression 1.

According to an exemplary embodiment, there may be provided an electrolyte solution for a lithium secondary battery, the electrolyte solution for a lithium secondary battery comprising: an additive comprising a compound represented by a specific chemical formula; an organic solvent; and a lithium salt. Therefore, a lithium secondary battery including the electrolyte solution for a lithium secondary battery can provide excellent high-temperature characteristics and other properties (e.g., initial resistance, fast charging performance, normal-temperature capacity characteristics, etc.

The application relates to a preparation method of a low-temperature-resistant cable and relates to the technical field of cable preparation. The low-temperature-resistant cable is prepared by adopting copper, manganese, nickel, cobalt, zinc, tin, titanium and graphite powder as a conductor prepared by depositing a nano-silver film on the surface of alloy micro wires, twisting the conductor according to requirements to obtain a core, mixing hydrogenated nitrile rubber, boron nitride nanosheets, refined paraffin, 4-hydroxycyclohexyl trimethoxysilane, ammonium polyphosphate, silicone oil and methyl methacrylate to prepare an insulation protective sleeve, and wrapping the core to obtain the low-temperature-resistant cable which can be applied to an intelligent power distribution system under extremely cold conditions. In the application, the initial resistance of the conductor under low temperature is reduced by optimizing the conductor, the NTC effect is effectively started, the heat conduction performance of the insulation protective sleeve is adjusted, the low-temperature brittle stop time of the cable under extremely cold conditions is reduced, the high-temperature stable temperature of the cable is reduced, the low-temperature brittleness and high-temperature aging of the cable insulation protective sleeve are effectively inhibited, and the working life of the cable in the intelligent power distribution system is prolonged.

The invention discloses a current limiting harmonic elimination device based on flow-sensitive materials, which belongs to the field of current limiting harmonic elimination devices, and includes a power grid, a voltage transformer, a current limiting harmonic elimination device, a trap filter and a measuring instrument connected in sequence; the current limiting harmonic elimination device includes harmonic elimination resistors Ra, Rb, Rc, Rn and a ventilation and heat dissipation shell for integrating the harmonic elimination resistors Ra, Rb, Rc and Rn, wherein the harmonic elimination resistors Ra, Rb and Rc are respectively connected in series to the primary winding of the voltage transformer in the A, B and C three-phase circuits, and the harmonic elimination resistor Rn is connected in series between the primary neutral point of the voltage transformer and the ground; the inlet terminals of the harmonic elimination resistors Ra, Rb and Rc are respectively connected to the primary outlet terminals of the corresponding voltage transformer PT. The invention can quickly and timely discharge the heat generated by the harmonic elimination resistors through the ventilation and heat dissipation shell, and the current limiting harmonic elimination device of the present application can solve the problem of ferromagnetic resonance relative to ground overvoltage and phase-to-phase overvoltage surge current, and effectively avoid the occurrence of PT cabinet burning and fuse blowing accidents.

The present disclosure can provide a method for manufacturing a positive electrode active material that can contribute to improving battery performance. The disclosed manufacturing method comprises: a preparation step (S10) in which a starting material containing at least a transition metal element is prepared; a preparation step (S20) for preparing a transition metal solution by dissolving the transition metal element in the starting material in the extraction solution; a precursor generation step (S30) in which the positive electrode active material precursor is crystallized by adding an alkali solution to the transition metal solution; and an active material generation step (S40) for generating a positive electrode active material by heating the positive electrode active material precursor together with a lithium compound. Furthermore, the disclosed production method is characterized in that the sulfate ion concentration of the transition metal solution when the precursor generation step is performed is 0.9 mol / L or less.

The liquid crystal composition contains: (I) at least one compound selected from the group consisting of a compound represented by general formula (1), a compound represented by general formula (2), a compound represented by general formula (3), a compound represented by general formula (4-1), a compound represented by general formula (4-2), a compound represented by general formula (4-3), a compound represented by general formula (5), and a compound represented by general formula (6), which are described in the description; (II) a solute; and (III) a non-aqueous organic solvent, thereby providing a non-aqueous electrolyte solution having a low initial resistance value, a non-aqueous electrolyte solution battery, and a compound suitable for use in the non-aqueous electrolyte solution.

The present disclosure relates to an anode mixture for a secondary battery, an anode comprising the anode mixture, and a secondary battery. Specifically, in one embodiment of the present disclosure, an anode mixture for a secondary battery comprising a binder composition within a specific content range is provided, wherein the binder composition is a mixture of an AAM / AA / AN copolymer and HASE.