LG Energy Solution Patente

Provided is a battery cell assembly including a cell block with a plurality of battery cells and a case configured to accommodate the cell block, in which the case includes an upper cover plate facing an upper side of the cell block and including a first cooling channel configured such that a first fluid flows therethrough, and a lower cover plate facing a lower side of the cell block and including a venting hole and a second cooling channel configured such that a second fluid flows therethrough.

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A battery cell according to an embodiment of the present disclosure may include an inner cell in which an electrode assembly is housed in a pouch-shaped outer packaging; a case accommodating the inner cell and having higher rigidity than the outer packaging; an end cover covering an end portion of the case and having an insulating material; and a pad disposed in close contact between an inner surface of the case and an outer surface of the inner cell and configured to elastically deform.

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The present invention relates to a graphite-based negative electrode active material having excellent rapid charging performance by including artificial graphite having an interplanar spacing d(002) of a (002) plane of 0.3360 nm to 0.3370 nm and a crystallite size Lc in a c-axis direction of 30.0 nm to 38.5 nm and a method of preparing the same.

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The present disclosure relates to a negative electrode for a lithium secondary battery and a method of manufacturing the same. The negative electrode satisfies a ratio of porosity to orientation index (O.I.) of a carbon-based negative electrode active material within a predetermined range, thereby shortening the movement path of lithium ions in a negative electrode active layer and significantly lowering diffusion resistance of lithium ions, thereby the rapid charging performance of the negative electrode is excellent. In addition, the negative electrode has an advantage of excellent energy density of the negative electrode because the density of the negative electrode active layer is improved within a range that does not damage the shortened movement path of lithium ions.

A busbar frame assembly according to an embodiment of the present disclosure comprises: a busbar connected to electrode leads of a plurality of battery cells; a printed circuit board (PCB) connected to the busbars or the electrode leads for sensing the voltage of the battery cells; and a busbar frame on which the busbars are disposed, wherein the busbar frame includes a coupling part that couples with the busbar, and wherein the busbar includes a recessed part that couples with the coupling part.

The present disclosure provides a battery pack including: a plurality of battery cells; a pack case configured to accommodate the plurality of battery cells and having a venting device provided on at least one side to discharge venting gas generated from the battery cell to the outside; and a cover member configured to at least partially cover the venting device and having multiple through-holes formed to allow the venting gas to pass therethrough, wherein an area of the multiple through-holes is configured to at least partially vary.

The present disclosure relates to a battery module including: a plurality of battery cells; and a cover member configured to at least partially surround outer surfaces of at least some of the plurality of battery cells and to maintain a uniform temperature within the battery cell.

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A battery management system and a battery management method are provided. The battery management system according to the present disclosure includes a sensing unit configured to generate state data of each of a plurality of cell groups included in a battery assembly; a discharging unit configured to individually open and close a plurality of discharge paths provided to the plurality of cell groups; and a control unit configured to perform a diagnostic procedure to identify whether each of the plurality of cell groups has high temperature abnormality or low temperature abnormality based on the state data. The control unit determines at least one cell group of the plurality of cell groups as a discharge target based on a result of the diagnostic procedure, and controls the discharging unit so that at least one discharge path provided to the discharge target is conducted.

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Disclosed is a pouch-shaped battery cell tray having a temperature sensing function, the pouch-shaped battery cell tray including an outer frame forming a first space portion configured to receive a plurality of pouch-shaped battery cells, the outer frame being configured such that an upper surface and a part of a side surface thereof are open, a seating unit disposed in the first space portion, the seating unit being configured to allow the plurality of pouch-shaped battery cells to be vertically received therein such that a second space portion is formed between the plurality of pouch-shaped battery cells, and a temperature sensor unit disposed at a side surface of the outer frame, the temperature sensor unit being configured to measure the temperatures of the plurality of pouch-shaped battery cells received in the first space portion.

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Embodiments provide a battery pack. The battery pack includes a pack housing including a base plate and a side wall, a plurality of battery cell assemblies on the base plate, a lid coupled to the side wall of the pack housing, and a foaming device configured to release a foam layer into an inner space defined by the pack housing and the lid.

A battery pack according to the present disclosure includes a battery assembly including a plurality of battery cells; a pack case having a housing space in which the battery assembly is housed; at least one first venting hole provided on a first side of the battery assembly; a venting space disposed on the first side of the first venting hole and provided in the pack case; and at least one open and closed member configured to be opened to bring the first venting hole and the venting space into communication with each other in response to an internal pressure of a preset magnitude or more being formed, the open and closed member being disposed corresponding to the first venting hole.

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A battery cell according to the present disclosure includes an electrode assembly including a positive electrode, a negative electrode and a separator stacked along a stacking direction; a cell case accommodating the electrode assembly; and a thermal insulator disposed on one remaining side of the cell case except two side portions in the stacking direction of the electrode assembly, the thermal insulator including a thermal insulation material, wherein the cell case includes a contact portion disposed at a different location from a location of the thermal insulator, the contact portion configured to contact a cooler.

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A battery module according to an embodiment of the present disclosure includes a cell assembly formed by stacking battery cells and having a pair of electrode leads arranged to face upward, a lower frame having a form in which one side and an opposite side are open in the longitudinal direction and accommodating the cell assembly, a busbar frame assembly coupled to the lower frame and including a busbar frame mounted on the cell assembly, and a plurality of busbar plates fixed onto the busbar frame and electrically connected to the electrode leads of the battery cell.

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The present disclosure relates to a battery pack including: a plurality of battery cells; and a pack case configured to store the plurality of battery cells and including a cross-beam configured to partition the plurality of battery cells and having a through-hole formed therein to allow venting gas generated from the battery cells to pass therethrough.

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