LG Energy Solution Patente

Disclosed is a battery pack, which includes a plurality of battery modules; a pack case having an outer wall and a plurality of cross beams that partition an inner space surrounded by the outer wall, the pack case being configured such that the plurality of battery modules are respectively arranged in the partitioned spaces; and a gas movement channel provided inside the cross beams and the outer wall, wherein the battery pack is configured such that, when gas is generated in any one of the battery modules, the gas is discharged to the outside of the pack case through the gas movement channel of the outer wall and the cross beam adjacent to the battery module in which the gas is generated.

The present invention relates to a pouch film laminate including a base material layer, a gas barrier layer, and a sealant layer which are sequentially laminated, wherein the base material layer includes a surface protection layer, and the pouch film laminate has a Max Forming Index A (MFI_A) expressed by Equation 1 of 15 or more. MaxFormingIndexAMFIA=PT/AT×TSIn Equation 1, PT is a value of a thickness (µm) of the surface protection layer, AT is a value of a thickness (µm) of the pouch film laminate, and TS is a value of tensile strength (N/15 mm) of the pouch film laminate.

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A battery diagnosis device according to an embodiment disclosed in this document may include an interface that acquires a first charge profile in the middle of life (MOL) of a battery cell, and at least one processor that predicts a second charge profile using a battery physical model representing a state of a battery and an input parameter that depends on a change in a degradation indicator corresponding to the first charge profile and calculates the degradation indicator of the battery cell corresponding to each of the first charge profile and the second charge profile.

An electrolyte composition for a lithium secondary battery according to an aspect of the present disclosure includes a lithium salt, an electrolyte additive, and a non-aqueous organic solvent. The electrolyte additive includes an inorganic compound, the non-aqueous organic solvent includes a cyclic ester-based solvent in an amount of about 60 vol.% or more and less than 100 vol.%, and the electrolyte composition exhibits a heat flow of about 30.0 W/g or less within a range of about 250 °C to 350 °C when the heat flow measurement is performed on a mixture containing a negative electrode active material of a 100% charged lithium secondary battery and the electrolyte composition, at a weight ratio of about 1:0.5.

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Disclosed are an electrode assembly having an insulating tape attached thereto, the electrode assembly including an electrode stack constituted by a plurality of positive electrodes and a plurality of negative electrodes stacked alternately with a separator disposed therebetween, a positive electrode lead coupled to a positive electrode tab bundle constituted by positive electrode tabs protruding respectively from outer peripheries of the plurality of positive electrodes and overlapping each other, a negative electrode lead coupled to a negative electrode tab bundle constituted by negative electrode tabs protruding respectively from outer peripheries of the plurality of negative electrodes and overlapping each other, a first insulating tape attached to at least a part of an upper surface of the electrode stack, to an upper surface of a positive electrode coupling portion where the positive electrode tab bundle and the positive electrode lead are coupled to each other, and to an upper surface of a negative electrode coupling portion where the negative electrode tab bundle and the negative electrode lead are coupled to each other, and a second insulating tape attached to at least a part of a lower surface of the electrode stack, to a lower surface of the positive electrode coupling portion where the positive electrode tab bundle and the positive electrode lead are coupled to each other, and to a lower surface of the negative electrode coupling portion where the negative electrode tab bundle and the negative electrode lead are coupled to each other, wherein the positive electrode tab bundle and the negative electrode tab bundle are formed at the same outer periphery so as to be spaced apart from each other, and at least one of the first insulating tape and the second insulating tape includes a cut-out portion formed such that at least a part between a positive electrode portion attached to the positive electrode coupling portion and a negative electrode portion attached to the negative electrode coupling portion is removed, and a lithium secondary battery including the same.

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The present application provides roll-to-roll type electrode assembly manufacturing equipment comprising: a sheet supply unit (100) including a first sheet supply unit for supplying a first separator sheet and a second separator sheet and a second sheet supply unit for supplying a lithium metal sheet; an application unit for applying a binder to at least one of the first separator sheet and the second separator sheet; and a lamination unit for laminating the first separator sheet and the second separator sheet while having the lithium metal sheet disposed therebetween, wherein; each of the first separator sheet and the second separator sheet includes an inner area corresponding to the lithium metal sheet at the time of lamination by the lamination unit, and an outer area at least partially surrounding the peripheral portion of the inner area in the thickness direction (TD); and the application unit applies the binder onto at least a part of the outer area of the first separator sheet and the outer area of the second separator sheet.

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A BMS performance test system may include a battery pack simulator (BPS) implemented to simulate a plurality of battery cells of a target battery device to be simulated and providing a battery measurement information; a test device for generating a BPS test signal based on a test information including the battery measurement information; and a CAN analysis device that converts the BPS test signal into a first CAN signal to be transmitted to the BPS, and receives a second CAN signal including the battery measurement information from the BPS. The BPS may include a measuring instrument for providing the battery measurement information; and a communication converter that receives the first CAN signal from the CAN analysis device, converts the first CAN signal according to the communication method of the measuring instrument to generate a first simulation control signal to be provided to the measuring instrument, and receives the battery measurement information from the measuring instrument to be transmitted to the CAN analysis device.

The present disclosure relates to a secondary battery. A secondary battery according to an embodiment of the present disclosure may include a cylindrical electrode assembly; a can housing accommodating the electrode assembly; and a top cap assembly coupled to the can housing to cover the electrode assembly, wherein the top cap assembly may include a fire extinguishing module having a fire extinguishing material configured to sprayed onto the electrode assembly; and a top cap disposed above the fire extinguishing module and electrically connected to the electrode assembly to enable electrical connection to the outside, wherein the fire extinguishing module may include a fire extinguishing capsule in which a receiving space accommodating a fire extinguishing material is formed and at least a portion of the fire extinguishing capsule is formed to be meltable; and a support frame that is coupled to the fire extinguishing capsule to support the fire extinguishing capsule and has an opening formed in a portion of the support frame to enable the fire extinguishing material flow to the electrode assembly.

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The present disclosure relates to a pack housing comprising a heat sink, a pair of side frames coupled to both side surfaces of the heat sink, and a front frame and a rear frame coupled to the front and rear of the heat sink respectively, wherein, in one example, the heat sink and the pair of side frames are integrally formed by extrusion molding, and accordingly, no separate bonding surface is formed between the heat sink and the pair of side frames.

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The present invention relates to a pouch film laminate including a substrate layer, a gas barrier layer, and a sealant layer laminated in sequence, wherein the substrate layer includes a surface protection layer, and a ratio of a thickness of the pouch film laminate to a thickness of the surface protection layer is 6 to 10.

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