LG Energy Solution Patente

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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 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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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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The present invention relates to a method for manufacturing a lithium secondary battery, the method comprising: a step of preparing an electrode assembly comprising a positive electrode, a negative electrode, and a separator; a step of accommodating the electrode assembly in a battery case; a step of injecting a first non-aqueous electrolyte into the battery case to manufacture a pre-lithium secondary battery; a step of activating the pre-lithium secondary battery; and a step of injecting a second non-aqueous electrolyte into the activated pre-lithium secondary battery, wherein the first non-aqueous electrolyte comprises a first organic solvent comprising a linear carbonate-based solvent, and the second non-aqueous electrolyte comprises a second organic solvent comprising an ester-based solvent.

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The present invention relates to: a separator comprising a porous substrate, a ceramic coating layer provided on at least one of respective surfaces of the porous substrate, and a positively charged self-assembled monolayer provided on the ceramic coating layer; a method for manufacturing the separator; and a secondary battery comprising the separator.

The present invention relates to a negative electrode having excellent rapid charging performance and swelling properties and a method for manufacturing the same, and the negative electrode of the present invention includes a negative electrode mixture layer including a Si-based negative electrode active material and a carbon-based negative electrode active material, wherein the surface of the negative electrode mixture layer has a 85° gloss of 14 to 25 in a fully-discharged state after activation.

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The present invention provides a lithium secondary battery comprising a positive electrode, a negative electrode, a separator; and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material, the positive electrode active material includes lithium iron phosphate particles, a loading amount of the positive electrode is 450 mg/25 cm² to 740 mg/25 cm², the non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, the additive includes at least one selected from the group consisting of compounds represented by Formulas 1 to 3 below, and the additive is included in the non-aqueous electrolyte in an amount of 0.1 wt% to 3 wt%.

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The present disclosure provides a non-aqueous electrolyte comprising a lithium salt, an organic solvent and a compound represented by Formula 1:wherein, in Formula 1, R₁ and R₂ are each independently any one selected from a group consisting of H, -OC=CH, F, a nitrile group, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, and an alkynyl group having 2 to 10 carbon atoms.

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The present invention relates to a lithium secondary battery, in which a relationship among a size of the secondary battery, an amount of remaining ethylene carbonate, and a reaction area of a negative electrode satisfies a specific condition to improve safety when high heat is applied from an external heat source, and a method of evaluating thermal safety of a lithium secondary battery which may evaluate thermal safety of a cylindrical type lithium secondary battery through the above information.