LG Energy Solution Patente

The present invention relates to an electrode mixture film including a binder having a three-dimensional fiber network structure, and an electrode active material accommodated in the fiber network structure, wherein an R value defined by factors of density and tensile strength of the electrode mixture film is 5.0 to 10.0, and by increasing sheeting completeness of the electrode mixture film, the electrode mixture film may satisfy the range of the R value, through which it is possible to provide an electrode mixture film having excellent mechanical strength and excellent appearance characteristics and allowing a lamination process with a current collector to be stably performed.

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The present disclosure relates to a battery cell testing device, and the battery cell testing device according to an aspect of the present disclosure is a battery cell testing device for determining characteristics of a battery cell, and includes a support frame configured to support the battery cell; and a sensor assembly disposed at a side of the support frame and configured to sense the characteristics of the battery cell, wherein the sensor assembly includes a sensor; and a holder coupled to the support frame to support the sensor.

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The present disclosure relates to a negative electrode for lithium-free secondary battery that can reduce side reactions on the negative electrode and improve the electrochemical characteristics and lifetime characteristics of a lithium-free secondary battery even while achieving reduction in weight and thickness, a preparation method thereof, and a lithium-free secondary battery comprising the same.

A secondary battery includes a stack-type electrode assembly in which a plurality of unit batteries are stacked in a first direction, the stack-type electrode assembly having electrode leads at each end thereof in a second direction perpendicular to the first direction, a multifunctional terminal block located at each end of the stack-type electrode assembly, and a laminate sheet surrounding side surfaces of the stack-type electrode assembly. The multifunctional terminal block includes a fused resin layer having a locally increased thickness on a side surface thereof.

The present technology provides a monitoring method including generating a failure prediction model for production equipment, and monitoring the production equipment based on the failure prediction model, in which the generating of the failure prediction model includes generating frequency domain data by processing time domain vibration data through frequency analysis, the time domain vibration data being transmitted from a vibration sensor in the production equipment, generating frequency domain-of-interest data by extracting data corresponding to a component-specific frequency band of interest from the frequency domain data, generating production process-related data by determining a filtering section satisfying a process condition of the production equipment and extracting data corresponding to the filtering section from the frequency domain-of-interest data, and generating index data by standardizing the production process-related data.

The present invention provides a structure of a battery module including: a battery cell; a module frame having a bottom plate whereon the battery cell is disposed; and a thermally conductive resin interposed between a bottom surface of the battery cell and the bottom plate, wherein the bottom plate is provided with a anchor arranged in grid of multiple rows and multiple columns, and the thermally conductive resin extends downward and fills the anchor.

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Disclosed is a battery pack including a battery cell stack including a plurality of battery cells, a pack frame body configured to allow the battery cell stack to be mounted therein, a top plate coupled to an upper part of the pack frame body, and a first end plate and a second end plate coupled to both ends of an assembly of the pack frame body and the top plate, respectively, wherein a mounting hole for assembly is formed in each of the first end plate and the second end plate. Interference is reduced when mounting a pre-assembled battery pack on an assembly jig, thereby preventing assembly defects.

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The present disclosure relates to a battery module including: a tube; a positioning element rotatably disposed inside the tube, having at least one positioning portion, and configured to rotate relative to the tube between a positioning state and a releasing state; and at least one battery assembly disposed inside the tube and having a groove. When the positioning element is in the positioning state, the positioning portion is positioned inside the groove to prevent the battery assembly from moving in an axial direction of the tube. When the positioning element is in the releasing state, at least one positioning portion leaves the groove.

The present invention provides a fuse-integrated busbar, including: a first busbar 32 including a plurality of busbar layers 300 stacked therein, each of the plurality of busbar layers 300 including: an element 310 provided with a melting portion M melting and disconnecting when an overcurrent flows therethrough; and a first busbar unit 320 and a second busbar unit 330 integrated with the element 310 and extending from two lengthwise ends of the element 310, respectively; and an extinguishing member 34 surrounding a plurality of the elements 310 of the plurality of busbar layers 300 to extinguish an arc.

A sealing device according to an embodiment of the present disclosure seals a lead film covering a lead metal of an electrode lead and a pouch enclosing the lead film. The sealing device includes a sealing block including at least one sealing surface provided to press the lead film and the pouch overlapping with each other; and a sealing protrusion provided on a portion of the sealing surface to protrude from the sealing surface with a predetermined thickness in a pressing direction of the sealing block to prevent the lead film from flowing into a width direction of the sealing surface.

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A secondary battery including a electrode assembly stack having a plurality of unit batteries stacked in a first direction and having electrode tabs of each of the plurality of unit batteries at both ends in a second direction perpendicular to the first direction; multifunctional terminal blocks (MTB) provided at both ends of the stack-type electrode assembly; and a laminate sheet surrounding the side surfaces of the stack-type electrode assembly is provided. The MTB includes a busbar structure electrically connected to the electrode tabs and an MTB housing accommodating the busbar structure, and the busbar structure includes a first busbar plate into which a plurality of electrode tabs are inserted together and a second busbar plate in surface contact with the first busbar plate.

The present invention relates to a positive electrode material comprising a first positive electrode active material having a secondary particle form in which a plurality of primary particles are aggregated, comprising nickel, cobalt and manganese, containing nickel in an amount of 70 mol% or more among total metals, and having a first average particle diameter (D₅₀), and a second positive electrode active material having a second average particle diameter (D₅₀) different from the first average particle diameter (D₅₀), wherein the first positive electrode active material has an average aspect ratio, which is an arithmetic mean value of an aspect ratio defined by Equation 1, of 0.86 to 0.94, and an average compactness, which is an arithmetic mean value of a compactness defined by Equation 2, of 0.89 to 0.96. Aspectratio=ra/RCompactness=rc/RIn Equations 1 and 2, R is a length of a long axis passing through the center of the first positive electrode active material particle, r_a is a length of a short axis passing through the center of the first positive electrode active material particle, and r_c is a diameter of a circle having the same area as the area of the first positive electrode active material.

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The present invention provides a lithium secondary battery having improved high-temperature cycle characteristics. In detail, the present invention relates to, and provides a lithium secondary battery including a positive electrode, a negative electrode, a separator, and an electrolyte, wherein the positive electrode includes lithium iron phosphate, a loading amount of the positive electrode is from 32 mg/cm<2> to 60 mg/cm<2>, the electrolyte includes a first organic solvent, a second organic solvent, a first additive, and a second additive, the first organic solvent is a cyclic lactone compound, the second organic solvent is a carbonate organic solvent, the first additive is lithium nitrate (LiNO<3>), and the second additive is a sulfonylimide compound.

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The present disclosure relates to a lithium secondary battery with improved high-temperature cycle properties, and specifically, in a lithium secondary battery including a positive electrode, a negative electrode, a separator, and an electrolyte, the positive electrode includes a lithium iron phosphorous oxide as a positive electrode active material, wherein the loading amount of the positive electrode is 32 mg/cm<2> to 60 mg/cm<2>, and the electrolyte includes a lithium salt, a first organic solvent, a second organic solvent, a first additive, and a second additive, wherein the first organic solvent is a cyclic lactone compound, the second organic solvent is a carbonate-based organic solvent, the first additive is a lithium nitrate (LiNO<3>), and the second additive is an imidazole-based compound.

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The present invention provides: an electrolyte for a lithium-sulfur battery, the electrolyte comprising a predetermined lithium salt, thereby exhibiting excellent capacity retention and lifespan characteristics; and a lithium-sulfur battery comprising same. The electrolyte for a lithium-sulfur battery, according to one embodiment of the present invention, comprises a lithium salt, a nonaqueous solvent and an additive, wherein the lithium salt comprises lithium bis(fluorosulfonyl)imide (LiFSI) and a triflate-based compound, and the total molar concentration of LiFSI and the triflate-based compound in the electrolyte is 0.5-1.0 M..

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