LG Energy Solution Patente

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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.

A battery pack according to an embodiment disclosed herein may include a plurality of battery cells, a first material positioned between the plurality of battery cells, a piezoelectric sensor adjacent to the first material, a temperature sensor configured to detect temperatures of the plurality of battery cells, and a battery management apparatus configured to determine abnormality of the plurality of battery cells, abnormality of the piezoelectric sensor, and abnormality of the temperature sensor based on information received from the piezoelectric sensor and the temperatures of the plurality of battery cells.

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.

The present invention relates to a positive electrode active material including a lithium composite transition metal oxide in the form of a single particle composed of one nodule or a pseudo-single particle, which is a composite of 30 or fewer nodules, and a coating layer including a first coating layer formed on the surface of the lithium composite transition metal oxide and a second coating layer formed on the surface of the first coating layer, wherein the lithium composite transition metal oxide has a roundness, which is defined by Equation 1 below, of 0.50 to 0.68, and the second coating layer contains boron, wherein the boron is included in a weight of 300 ppm to 2400 ppm based on the total weight of the positive electrode active material. Roundness=4×Area/π×R2In Equation 1 above, R denotes the length of a major axis passing through the center of the lithium composite transition metal oxide, and Area denotes an actual area of the lithium composite transition metal oxide.

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.

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The present disclosure relates to a battery assembly. The battery assembly according to an embodiment of the present disclosure may include a battery cell, a circuit board coupled to the battery cell and electrically connected to the battery cell, a chip thermistor configured to sense a temperature of the battery cell, and electrically connected to the circuit board, and a first busbar extended between a negative electrode of the battery cell and the circuit board to electrically connect the negative electrode of the battery cell to the circuit board, and electrically connected to the chip thermistor.

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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 sodium composite transition metal oxide particles having a P2 orthorhombic crystal structure, 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 3:1.

The present invention relates to a negative electrode active material. Specifically, the negative electrode active material comprises: artificial graphite particles; and a nitrogen element, an oxygen element, and a hydrogen element present on the surface of, inside, or both on the surface of and inside the artificial graphite particles, wherein the content of the nitrogen element is 80 to 180 mg per kg of the negative electrode active material.

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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.

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.

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, a ratio (I<B>/I<A>) of a C<3>H<7>+ peak intensity (I<B>) to a C<2>H<3>O<+> 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 carbon content at an interface of the current collector to carbon content in the electrode material mixture film, which is measured by scanning electron microscope-energy dispersive X-ray spectroscopy, is 1.08 or more.

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The present invention relates to an adhesive film for a secondary battery, wherein the adhesive film includes an outer insulation layer, and an adhesive layer positioned on one surface of the outer insulation layer, wherein the adhesive layer has a contact angle of 100° or more, and the adhesive layer has a wetting tension of less than 30 mN/m.

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A battery management apparatus includes a memory and a processor operatively connected to the memory. The processor determines an operating range of the battery pack based on battery state variables; calculates degradation rate values of the battery state variables based on energy degradation parameters; measures a usable battery energy (UBE) to be supplied by the battery pack based on a standard test pattern; and estimates a state of certified energy (SOCE) of the battery pack by comparing a measured UBE value with a reference UBE value.

A lithium secondary battery may include an electrode assembly including a positive electrode, an electrolyte, and a battery case including an internal space for accommodating the electrode assembly and the electrolyte. The positive electrode includes a positive electrode active material, and the positive electrode active material includes a lithium nickel-based oxide containing 50 mol% to 70 mol% of nickel among all metals excluding lithium. An electrolyte filling factor (EFF) index defined by Equation 1 is 1.52 to 1.88. EFF = R E × S U N C <img class="EMIRef" id="0802dedc-d94f-4626-9103-2ab16080376a-ia01" /> In Equation 1, R<E> is a mass of residual electrolyte contained in the lithium secondary battery after activation, S<U> is a ratio (S<E>/S<C>) of the volume (S<E>) of the electrode assembly and the volume (S<C>) of the lithium secondary battery, and N<C> is a capacity when the lithium secondary battery is discharged from 4.4 V to 3.0 V at 0.33 C at 25 °C.

The present invention relates to a positive electrode active material including a single-particle type lithium nickel-based oxide represented by [Formula 1] below, and a coating layer disposed on a surface of the single-particle type lithium nickel-based oxide, and the positive electrode active material has a RPI₂/RPI₁ of 1 to 1.3, which is a ratio of RPI₂ defined by Equation 2 below to RPI₁ defined by Equation 1 below. [Formula 1] Li_x[Ni_aCo_bM¹_cM²_d]O₂where, in Formula 1 above, M¹ is Mn, Al, or a combination thereof, M² includes one or more selected from the group consisting of Ti, Mg, Zr, Y, Ba, Ca, Sr, W, Ta, Nb, and Mo, and x, a, b, c, and d satisfy 0.9≤x≤1.1, 0.8≤a<1, 0<b<0.2, 0<c<0.2, and 0≤d<0.1: RPI1=I2/I1RPI2=I3/I1where in Equations 1 and 2 above, I₁, I₂ and I₃ are values obtained by measuring intensity in X-ray diffraction patterns after manufacturing an electrode including the positive electrode active material, I₁ is a minimum peak intensity value appearing in a region of 2θ=37° to 38°, I₂ is an average peak intensity value appearing in a region of 2θ=37.3° to 37.5°, and I₃ is an average peak intensity value appearing in a region of 2θ=37.0° to 37.2°.

Disclosed is a container module. A container module according to an embodiment of the present disclosure may include a case providing an internal space and including a rear panel; a battery array including a plurality of battery packs positioned inside the case and stacked in the vertical direction; a cooling unit providing cooling air to the inside of the case; and a duct positioned inside the case and allowing a gap between the battery array and the rear panel to communicate with the cooling unit.