LG Energy Solution Patente

A charging protocol setting apparatus according to an embodiment of the present disclosure includes a charging unit configured to charge a battery so that the battery repeats a charging state and a rest state; a measuring unit configured to measure a voltage of the battery while the battery is being charged; a temperature adjusting unit configured to adjust a temperature of the battery while the battery is being charged; and a control unit configured to control the charging unit so that the battery is charged at a preset first C-rate, calculate a resistance of the battery at each SOC (State of Charge) based on a voltage drop in the rest state, determine a first charging upper limit SOC corresponding to the first C-rate based on the SOC and the resistance, and set a charging protocol including a corresponding relationship between the first C-rate and the first charging upper limit SOC.

The present invention relates to a positive electrode for a sodium secondary battery, the positive electrode including a current collector, a first positive electrode active material layer disposed on the current collector, and a second positive electrode active material layer disposed on the first positive electrode active material layer, wherein the first positive electrode active material layer includes a first positive electrode active material, and the second positive electrode active material layer includes a second positive electrode active material, wherein the first positive electrode active material includes sodium composite transition metal oxide particles having an O3 octahedral crystal structure, and the second positive electrode active material includes Prussian blue analog particles, wherein a ratio of the average particle diameter (D<50>) between the first positive electrode active material and the second positive electrode active material is 2:1 to 10:1.

The present invention relates to a dry electrode including a current collector; and an electrode material mixture film disposed on the current collector, wherein the electrode material mixture film includes an electrode active material and a fibrillizable binder, wherein a ratio (I_B/I_A) of a C₃H₇⁺ peak intensity (I_B) to a C₂H₃O⁺ peak intensity (I_A), which is measured on a surface of the current collector by Time-of-Flight secondary ion mass spectrometry (ToF-SIMS), is 1.3 or less, and a ratio of a carbon content at an interface of the current collector to a carbon content in the electrode material mixture film, which is measured by scanning electron microscope-energy dispersive X-ray spectroscopy, is 1.03 or less.

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The present invention relates to a lithium secondary battery having improved high-temperature cycle characteristics, and particularly, to a lithium secondary battery including a positive electrode, a negative electrode, a separator, and an electrolyte, wherein the positive electrode includes lithium iron phosphate and lithium nickel cobalt manganese oxide as a positive electrode active material, a loading amount of the positive electrode is in a range of 32 mg/cm<2> to 60mg/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 an oligomer including a repeating unit derived from a monomer represented by Formula 1 and a repeating unit derived from a monomer represented by Formula 2, and the second additive is an imidazole-based compound.

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The present invention relates to a lithium secondary battery including a battery case, and an electrode assembly and an electrolyte accommodated in the battery case, wherein a G value, defined by Equation (1) below, is 1.8 to 3.5. G=VCH−VC0Vtotal×C×100 where, in Equation (1) above, V_CH is a volume (unit: mL) of hydrocarbon-based gas present in the lithium secondary battery, V_CO above is a volume (unit: mL) of carbon oxide-based gas present in the lithium secondary battery, V_total is a total volume (unit: mL) of gas present in the lithium secondary battery, and C is a discharge capacity when the lithium secondary battery is charged and discharged at 0.33 C and a voltage ranging from 2.5 V to 4.2 V.

A container module according to an embodiment of the present disclosure may include: a case configured to provide an inner space; a first battery array positioned inside the case and including a plurality of battery packs stacked in an up-down direction; a second battery array positioned inside the case so as to be spaced apart from the first battery array in a left-right direction and including a plurality of battery packs stacked in the up-down direction; a cooling unit configured to provide cooling air into the case; and a duct positioned inside the case and configured to communicate the first battery array and the second battery array with the cooling unit.

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The present invention relates to a positive electrode which includes a positive electrode composite layer containing a high-nickel positive electrode active material having nickel in an amount of 80 mol% or greater in an entire metal excluding lithium, wherein A, defined by Equation (1) below, is 1 or less, and a preparation method of the positive electrode. A = 0.00076 ln − 2.435 × a / b + 268.4 × w <img class="EMIRef" id="03628002-ab6b-40a3-bac6-5b8305f61bb6-ia01" /> where, in Equation (1) above, a is a length of the positive electrode composite layer measured in mm, b is a width of the positive electrode composite layer measured in mm, and w is a value of moisture content in the positive electrode measured in ppm.

The present invention discloses a battery pack and a cover for the same. The battery pack according to the present invention may include: a pack case having an accommodating space with one open side, the pack case accommodating a plurality of battery modules therein; and a cover covering the one open side of the pack case and provided with a graphene coating layer thereon.

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The present invention relates to a method of activating an all-solid-state battery comprising a positive electrode, a negative electrode, and a solid electrolyte layer interposed between the positive electrode and negative electrode, the method comprising: a first charging step of charging the all-solid-state battery at a first current density; and a first discharging step of discharging the all-solid-state battery at a second current density greater than the first current density after the first charging step.

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A secondary battery module of the present disclosure includes a battery cell stack in which a plurality of battery cells with protruding electrode leads and a plurality of protective pads are stacked, and each protective pad is inserted to be placed between neighboring battery cells; a housing frame in which the battery cell stack is accommodated therein to cover surfaces of the battery cell stack except for the surface where the electrode leads protrude; and a busbar assembly that is coupled to the housing frame to cover a direction where the electrode leads protrude from the battery cells, has a busbar where the electrode leads are electrically connected, and is formed with a fitting groove where ends of the protective pads are fitted and fixed, wherein the protective pads include a pad portion made of a material that is fire resistant or flame retardant and elastic, and a rigid body portion made of a material in the shape of a plate having greater rigidity than the pad portion.

A battery cell stack according to an embodiment of the present disclosure may include a plurality of battery cells arranged parallel to each other, each battery cell including an electrode assembly having an electrode tab and an outer packaging accommodating the electrode assembly; and a compression pad interposed between the plurality of battery cells. The compression pad may include a main portion; and a side portion disposed at an end portion of the main portion, and having a lower compression ratio than the main portion, the side portion overlapping an electrode tab-side region of the battery cell with respect to a thickness direction of the compression pad.

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A battery diagnosis apparatus according to an embodiment disclosed herein includes an obtaining unit configured to obtain time-series data related to states of a plurality of battery cells included in a battery module, a voltage diagnosing unit configured to calculate a long-short term voltage moving average difference of each battery cell based on the time-series data and diagnose voltage abnormality of each battery cell based on the long-short term voltage moving average difference, a capacity diagnosing unit configured to calculate a state of health (SOH) moving average deviation of each battery cell based on the time-series data and diagnose capacity abnormality of each battery cell based on the SOH moving average deviation, and a detecting unit configured to detect an abnormal battery cell based on a diagnosis result of at least one of the voltage diagnosing unit or the capacity diagnosing unit.

A battery system according to an embodiment disclosed in this document includes a plurality of battery units; and an upper controller configured to perform wireless communication with a battery unit assigned as a master unit among the plurality of battery units, wherein each of the plurality of battery units is assigned as the master unit to communicate with the upper controller in different periods.

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A container module according to an embodiment of the present disclosure includes: a case providing a space therein and including a side panel; a first side column positioned inside the case, extending in an up-down direction, and coupled to the side panel; a bracket positioned inside the case, coupled to the first side column, and extending in a front-rear direction; and a battery pack installed on the bracket.

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A battery diagnosis apparatus according to an embodiment disclosed herein includes an obtaining unit configured to obtain time-series data related to states of a plurality of battery cells included in a battery module, a voltage diagnosing unit configured to calculate a long-short term voltage moving average difference of each battery cell based on the time-series data and diagnose voltage abnormality of each battery cell based on the long-short term voltage moving average difference, a capacity diagnosing unit configured to calculate a state of health (SOH) deviation of each battery cell based on the time-series data and diagnose capacity abnormality of each battery cell based on the SOH deviation, and a detecting unit configured to detect an abnormal battery cell based on a diagnosis result of at least one of the voltage diagnosing unit or the capacity diagnosing unit.

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