LG Energy Solution Patente

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A battery information generating apparatus according to an embodiment of the present disclosure includes: a profile acquisition unit that acquires a differential profile representing a correspondence between a capacity and a differential voltage of a battery; and a control unit that determines a target C-rate (current rate) corresponding to the differential profile, and correct the differential profile based on an overvoltage profile corresponding to the target C-rate, thereby generating a corrected profile.

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A battery management device according to an embodiment disclosed in this document may include an acquisition unit that acquires a voltage of each of a plurality of battery cells included in a battery unit, a switch connected to the battery unit and turned on or off in response to a control signal, a conversion unit that converts power of the battery unit into balancing power, and a controller that determines a cell balancing mode including an active balancing mode and a passive balancing mode and a balancing target cell based on the voltage of each of the plurality of battery cells, and manages the balancing target cell using the balancing power or power of the balancing target cell based on the determined cell balancing mode.

The present disclosure relates to an electrolyte solution for a lithium-sulfur battery and a lithium-sulfur battery including the same, and the electrolyte solution for the lithium-sulfur battery includes a non-aqueous solvent, a lithium salt, a nitrate and an aryl derivative, wherein the non-aqueous solvent includes a heterocyclic compound including a single oxygen atom (O) or a single sulfur atom (S) in a ring structure; and a glycol ether, and wherein the aryl derivative includes at least one of compounds represented by any one of Chemical Formulas 1 to 4.

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A composite positive electrode is disclosed, as well as a method for making the composite positive electrode and an all-solid-state battery including the composite positive electrode. The composite positive electrode includes: a plurality of sulfur particles having an average particle size from 5 µm to 10 µm; a plurality of sulfur-containing solid electrolyte particles of formula Li<6>PS<5>X, wherein X = Cl, Br, or I; and a conductive material including a plurality of acetylene black carbon particles. The acetylene black carbon particles have a mean particle size from 10 nm to 100 nm, a BET specific surface area from 50 m<2>g<-1> to 150 m<2>g<-1>, and a para-crystalline structure. The sulfur particles, sulfur-containing solid electrolyte particles, and conductive material are ball milled to form a milled mixture; and pressured to form the composite positive electrode.

Embodiments of the present disclosure provide a battery manufacturing system. The system includes a position measuring device configured to generate a sensing signal by sensing a position of an electrode sheet moving between an unwinder and a rewinder, a controller configured to collect position data of the electrode sheet, based on the sensing signal, and a measuring device and/or inspecting device configured to collect measurement data and/or inspection data of the moving electrode sheet and generate position-related measurement data and/or inspection data by relating the position data to the measurement data and/or inspection data. At least one of the controller or the measuring device and/or inspecting device corrects the position data of the electrode sheet, based on a change in an offset length.

To achieve the above-described objects, according to one example of the present invention, it is possible to provide a secondary battery stacking device and a secondary battery stacking method for manufacturing an electrode assembly product by laminating a second semifinished product on a first semifinished product laminated on a pallet.Even though stacking should be performed so that the center of the second semifinished product coincides with the center of the first semifinished product, it is not easy to calculate the actual center values of the first semifinished product when shape disturbance occurs at both ends of the first semifinished product.In the present example, it is possible to provide a stacking device and a stacking method capable of performing stacking by calculating center values of a first semifinished product in a diagonal manner instead of calculating the center values of the first semifinished product in a conventional vertical manner.

A battery temperature estimation device according to an embodiment disclosed in this document may include an impedance measurement unit configured to measure frequency-specific impedance of a battery; a memory configured to store a temperature-frequency table according to an imaginary part of impedance; and a controller configured to estimate a temperature of the battery through the temperature-frequency table based on an imaginary part of the frequency-specific impedance.

The present invention relates to an apparatus and method for manufacturing a secondary battery, and more particularly, to an apparatus for manufacturing a secondary battery, in which, in a post-processing process of a pouch-type secondary battery, main sealing is enabled in a state, in which the secondary battery stands vertically, to eliminate processes such as pre-sealing and pre-cutting, thereby reducing an manufacturing equipment layout and reducing a cost of a pouch through reduction of a pouch gas pocket part.

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A secondary battery according to an embodiment of the present invention comprises: a housing that includes a battery can forming an accommodation space therein and a top cap covering one open side of the battery can; an electrode assembly accommodated inside the battery can; and a current collecting plate electrically connected to at least one of the battery can or the top cap. The current collecting plate may include: a current collecting body that connects at least one of the battery can or the top cap to the electrode assembly; and a plating layer, having a greater electrical resistance than the current collecting body, on at least a portion of a welding surface of the current collecting body.

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A battery temperature estimation device according to an embodiment disclosed in this document may include an impedance measurement unit configured to measure frequency-specific impedance of a battery; a memory configured to store a temperature-impedance imaginary part table according to a frequency; and a controller configured to estimate a temperature of the battery through the temperature-impedance imaginary part table based on an imaginary part of the frequency-specific impedance.

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