LG Energy Solution Patente

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The present invention provides a structure of a battery cell and a structure of a battery module including one or more battery cells, the battery cell including: a pouch accommodating an electrode assembly; an electrode lead extending from the electrode assembly and protruding through a first lengthwise end of the pouch; a shield member comprising a flame retardant material, the shield member provided at the first lengthwise end of the pouch and comprising a through-hole where the electrode lead is passed through, wherein an inner circumferential surface of the through-hole corresponds to an outer circumferential surface of the electrode lead.

The present invention relates to a pouch-type battery case including a film laminate body in which a substrate layer; a gas barrier layer; and a sealant layer are stacked, the gas barrier layer includes aluminum and four or more transition metals, the transition metal is selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Zr, Nb, Mo, Hf, Ta, and W, and the gas barrier layer includes the aluminum and the four or more transition metals in a weight ratio of 1:0.20 to 1:5.0.

The present invention provides a structure of a battery module, including: a cell laminate including a pouch accommodating an electrode assembly, and a plurality of pouch-type battery cells, each of the plurality of pouch-type battery cells provided with an electrode lead extending from the electrode assembly and protruding through a first lengthwise end of the pouch; a bus bar assembly including: a bus bar frame disposed at a first lengthwise end of the cell laminate, the bus bar frame provided with a slit where the electrode lead is inserted; and a bus bar provided at a first lengthwise end of the bus bar frame and connected to the electrode lead inserted in the slit; and a shield member including a flame retardant material, the shield member disposed at a second lengthwise end with respect to the bus bar and including a through-hole where the electrode lead is inserted.

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An apparatus for diagnosing a battery according to the present disclosure includes a capacity calculating unit configured to calculate a positive electrode capacity value and a negative electrode capacity value of the battery, respectively, for each predetermined number of charge and discharge cycles; a degradation rate calculating unit configured to calculate a positive electrode degradation rate and a negative electrode degradation rate of the battery, respectively, based on the positive electrode capacity values and the negative electrode capacity values calculated by the capacity calculating unit; and a diagnosing unit configured to diagnose a state of the battery by referring to a comparison result of comparing the positive electrode degradation rate and the negative electrode degradation rate.

The present disclosure relates to a secondary battery. An aspect of the present disclosure may provide a secondary battery including: a pouch-type case including a first pouch and a second pouch connected to each other, the pouch-type case being folded along a folding line such that an accommodation space surrounded by the first pouch and the second pouch is formed; an electrode assembly accommodated in the accommodation space; and a film- or sheet-shaped spacer that is spaced apart from the electrode assembly in the direction of the folding line and interposed between the first pouch and the second pouch.

Example embodiments provide a secondary battery manufacturing apparatus. The secondary battery manufacturing apparatus includes: a masking jig configured to secure electrode leads and bus bars and including first to fourth inner side walls defining opening exposing the electrode leads and the bus bars; a first beam source configured to generate welding beams; a second beam source configured to generate inspection beams; a scanner head configured to direct the welding beams and the inspection beams to the electrode leads and the bus bars; a detector; a processor; and a controller.

The present disclosure relates to an electrode rolling system, and more specifically, to an electrode rolling system that presses the surfaces of one side and the other side of an electrode during transfer of the electrode. An electrode rolling system according to an embodiment of the present disclosure may include a moving unit that moves an electrode; a compression unit installed on a moving path of the electrode and compressing the thickness of the electrode by pressing the electrode; and a void forming unit installed at the rear end of the compression unit in the moving path of the electrode and forming a plurality of voids on the surface of the electrode, so that the process of pressing the electrode surface and the process of forming voids on the electrode surface may be performed continuously within one system.

A secondary battery module according to the present disclosure includes a battery cell stack having a plurality of battery cells stacked and accommodated in a housing frame; a busbar frame including a coupling surface coupled to the housing frame to cover the battery cell stack and a protrusion protruding from the coupling surface outward away from the battery cell stack and having a terminal provided on an upper surface; and an insulation cover including a side cover portion coupled to cover an outer side of the protrusion and an upper cover portion disposed further inward than the side cover portion to expose the terminal at a higher position than the protrusion, wherein the busbar frame has a shielding portion protruding from the coupling surface in the upward and downward directions to shield the space between the terminal and the battery cell stack. The present disclosure having the above configuration may prevent contact between dust and the terminal even if a fire occurs in the battery cell stack and the dust is generated because the space between the battery cell stack and the terminal is closed by the shielding portion and the upper cover portion. Accordingly, it is possible to prevent progression to thermal runway or to delay the ongoing thermal runway.

A battery management device according to an embodiment disclosed herein may include an acquisition unit configured to acquire voltages of a plurality of battery cells, and a controller configured to calculate a voltage profile for a voltage of each of the plurality of battery cells, linearly fit the voltage profile in a preset time section and calculate a slope of the voltage profile, and diagnose a state of each of the plurality of battery cells based on the slope of the voltage profile of each of the plurality of battery cells.

The present invention relates to a multi-walled carbon nanotube powder, a conductive material dispersion solution comprising the carbon nanotube powder, and a lithium secondary battery comprising the carbon nanotube powder. The multi-walled carbon nanotube powder, in a dry powder state, has, in a particle size distribution (PSD) measured by a particle size analyzer, a volume cumulative 50% average particle diameter (D₅₀) of 10-20 µm, a volume cumulative 90% average particle diameter (D₉₀) of 20-40 µm and a maximum particle diameter (D_max) of 45-70 µm, and contains 1.0-3.0 atom% of oxygen atoms, measured by XPS analysis, the particle size characteristics thereof in a powder state are controlled such that excellent dispersibility can be exhibited in an actual electrode, thereby enabling the viscosity of a dispersion solution to be lowered, and uniform dispersion thereof in an electrode is possible such that the resistance characteristics and lifespan characteristics of a lithium secondary battery can be improved.

A battery diagnosis apparatus according to an embodiment disclosed herein includes an obtaining unit configured to obtain open circuit voltage (OCV) data of a plurality of battery units, a deviation calculating unit configured to calculate OCV variances of the plurality of battery units in a first time period, based on the OCV data and calculate an OCV deviation with respect to an average, which is a difference between an average OCV variance of the plurality of battery units and an OCV variance of a target battery unit among the plurality of battery units, a standard deviation calculating unit configured to calculate a first determination value indicating a standard deviation of an OCV deviation with respect to an average for the target battery unit in a second time period, and a diagnosing unit configured to diagnose abnormality of the target battery unit based on the first determination value of the target battery unit.

The present disclosure relates to a battery module and a battery pack, and more specifically, to a battery module and a battery pack capable of regulating internal pressure by capturing internal gas. A battery module according to an embodiment of the present disclosure includes a plurality of battery cells, a gas capture unit disposed at a position adjacent to the battery cell, and a module case accommodating the plurality of battery cells and the gas capture unit, wherein the gas capture unit is broken when the internal pressure of the module case reaches a preset pressure, and captures gas to regulate the internal pressure of the module case, so that the module case of the battery module may be prevented from being damaged by the internal pressure by blocking the internal pressure of the battery module from rising above a certain level.

A battery module is disclosed. The battery module includes a module housing provided with a plurality of battery bank accommodating one or more battery cells therein, respectively, and a top plate provided with long sides and short sides and covering an upper portion of the module housing. , the battery module further includes: venting slit groups arranged at two lengthwise end portions of the top plate, respectively, each of the pair of venting slit groups including a plurality of venting slits arranged in short side direction; and at least one venting hole group arranged between the venting slit groups, each of the at least one venting hole group including a plurality of venting holes, wherein a short side direction width of each of the plurality of venting slits of the pair of venting slit groups is narrower than that of the venting holes of each of the at least one venting hole group in the short side direction.

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