LG Energy Solution Patente

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A battery management apparatus according to the present disclosure includes a profile obtaining unit configured to obtain a battery profile representing a corresponding relationship between voltage and capacity of a battery; a profile adjusting unit configured to adjust a preset reference positive electrode profile and a reference negative electrode profile to correspond to the battery profile, thereby generating a positive electrode profile and a negative electrode profile of the battery; and a control unit configured to extract a parameter for the battery from at least one of the positive electrode profile and the negative electrode profile and determine an available lithium increase rate of the battery based on the extracted parameter.

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A battery management apparatus according to the present disclosure includes a profile obtaining unit configured to obtain a battery profile representing a corresponding relationship between voltage and capacity of a battery; a profile adjusting unit configured to adjust a preset reference positive electrode profile and a reference negative electrode profile to correspond to the battery profile, thereby generating a positive electrode profile and a negative electrode profile of the battery; and a control unit configured to extract a parameter for the battery from at least one of the positive electrode profile and the negative electrode profile and determine an available lithium increase rate of the battery based on the extracted parameter.

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Provided are a method and apparatus for generating a quick charge map. The method for generating the quick charge map according to the present disclosure includes acquiring a plurality of charging test results respectively associated with a plurality of charging conditions according to a combination of a plurality of current rates and a plurality of ambient temperatures; determining a plurality of charging characteristic profiles respectively associated with the plurality of current rates by analyzing the plurality of charging test results; and determining a plurality of charging control profiles respectively associated with a plurality of temperatures of interest by analyzing the plurality of charging characteristic profiles. The quick charge map is a set of the plurality of charging control profiles.

The present invention relates to a method for recovering a positive electrode active material, and the method for recovering the positive electrode active material according to the present invention includes a first step of immersing a positive electrode, including a positive electrode current collector and a positive electrode composite layer containing a positive electrode active material and a binder, in an organic solvent capable of dissolving the binder to separate the positive electrode composite layer and the positive electrode current collector; a second step of removing the positive electrode current collector to obtain a first treatment solution including the positive electrode active material, the binder, and the organic solvent; a third step of removing at least some of the organic solvent included in the first treatment solution; a fourth step of precipitating the binder by adding water to the first treatment solution and separating the precipitated binder to obtain a second treatment solution including the positive electrode active material, the water, and the organic solvent; a fifth step of separating the positive electrode active material from the second treatment solution to obtain a third treatment solution including the water and the organic solvent; and a sixth step of removing the water from the third treatment solution and recovering the organic solvent.

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The present invention relates to a negative electrode active material, a negative electrode for a lithium secondary battery, including same, and a lithium secondary battery. The negative electrode active material includes a silicon-based active material; and graphite, wherein the graphite includes natural graphite and artificial graphite, an absolute value of a ratio of a difference in average particle diameter (D50) size of the natural graphite with respect to the artificial graphite is 10% or less, and an absolute value of a ratio of a difference in average particle diameter (D50) size of the silicon-based active material with respect to the artificial graphite is 40% or less.

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A battery pack according to the present disclosure includes a plurality of battery cells; a bus-bar assembly disposed on one side of the plurality of battery cells and including a sub-bus-bar unit connected to electrodes of the plurality of battery cells; and a metal member configured to support the plurality of battery cells at a bottom of the bus-bar assembly, wherein the sub-bus-bar unit includes a one-way connection bus-bar connected to the electrodes of the battery cells on one side of the sub-bus-bar unit in a width direction, and wherein the metal member is partially connected to the one-way connection bus-bar at a predetermined position to have a predetermined conductive area so as to avoid current differences in the one-way connection bus-bar.

A battery module according to various embodiments may comprise: a battery cell stack in which two or more battery cells are stacked; a frame accommodating the battery cell stack and including a plurality of venting holes on one surface thereof; and a hole cover part configured to cover the plurality of venting holes, wherein the hole cover part comprises: a cover plate; a rotation shaft connected to one end of the cover plate and rotatably fixed to the frame; and an elastic member having one end connected to the rotation shaft and the other end connected to the frame. Other embodiments are also possible.

A battery manufacturing device according to an embodiment of this document may include a memory configured to store at least one instruction, and at least one processor configured to execute the at least one instruction, in which the at least one processor is configured to, in a winding process of a battery, identify a movement distance that an electrode plate moves in a left direction or right direction of a direction in which the electrode plate advances before being wound, as a speed at which the electrode plate is wound is changed, determine a tension for pulling the electrode plate in a direction opposite to the direction in which the plate advances, based on the movement distance, and wind the electrode plate based on the tension.

The present invention provides a non-aqueous electrolyte and a lithium secondary battery including the same. The non-aqueous electrolyte of the present invention includes a lithium salt, an organic solvent, and an additive. The additive includes a cyclic borate-based compound so as to prevent the decomposition of the non-aqueous electrolyte of the lithium secondary battery in a high-power environment that could lead to negative electrode degradation, or to further improve low-temperature high-rate discharging characteristics, high-temperature stability, overcharging prevention, and high-temperature battery expansion suppression effects.