LG Energy Solution Patente

The present disclosure relates to an electrolyte composition for lithium secondary batteries. The electrolyte composition for lithium secondary batteries includes a fluorine-substituted linear ester solvent and a fluorine-substituted acrylic additive as a non-aqueous organic solvent and an electrolyte additive, respectively, thereby enabling uniform formation of a solid electrolyte interface layer (SEI layer) with high lithium ion conductivity and excellent heat resistance on the negative electrode surface during activation of the lithium secondary battery. Accordingly, since the reactivity between the negative electrode active material and the electrolyte composition is significantly reduced, the temperature at which heat generation begins between them (i.e., heat onset temperature) increases, thereby suppressing heat generation due to negative electrode deterioration and the like. In addition, the lithium secondary battery including the electrolyte composition has an advantage of excellent high temperature safety since it can minimize side reactions of the electrolyte composition occurring on the negative electrode surface when exposed to high temperature.

[Summary]A battery cell assembly related to one example of the present invention may comprise a plurality of battery cells, a housing including an accommodation portion in which the plurality of battery cells is accommodated, and at least one or more fixing members arranged to cover at least a partial region of an outer surface of each of the plurality of battery cells, for fixing the battery cells inside the accommodation portion, and having a battery cell exposure hole so that a portion of the battery cell is exposed to the outside.

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Disclosed is a battery module, which includes a cell stack having a plurality of battery cells; a module case configured to accommodate the cell stack and having a venting hole in a top plate that covers an upper end of the cell stack; and a venting channel formation sheet coupled to the top plate and having a folding portion that is folded at least once at a position corresponding to the venting hole, and the folding portion is provided to be spread over the venting hole by a predetermined pressure to form a gas movement passage in an upper portion of the top plate.

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The present disclosure relates to a connector, and the connector according to one aspect of the present disclosure may include a connector body including a main body portion providing a receiving space and a sub-body portion connected to the receiving space and providing a connection space with one side open; a cable having an end disposed in the receiving space; a terminal including a cable coupling portion coupled to the end of the cable and a terminal portion extending from the cable coupling portion to the connection space; and a retainer coupling the terminal and the connector body, wherein the retainer may include a retainer body portion disposed in the receiving space and fixing the cable coupling portion in position; and a terminal receiving portion extending from the retainer body portion and accommodating the terminal portion therein.

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Disclosed is a battery pack and a vehicle including the same. The battery pack includes a plurality of battery modules in which a plurality of battery cells are stacked; a pack case in which the plurality of battery modules are accommodated; and a fastening member configured to fasten the pack case, wherein the fastening member is configured to be separated by an internal pressure of the pack case.

Disclosed herein relates to a dual layer slot die coater including: a first die block equipped with a first manifold for accommodating an electrode slurry; a middle block coupled to the first die block; a first coater shim that forms a first electrode slurry slot for discharging an electrode slurry filled in the first manifold, which is interposed between the first die block and the middle block in a shape that wraps around both sides and a rear surface of the first manifold; a second die block that is coupled to the middle block and equipped with a second manifold for accommodating an electrode slurry; and a second coater shim that forms a second electrode slurry slot for discharging an electrode slurry filled in the second manifold, which is interposed between the second die block and the middle block in a shape that wraps around both sides and the rear surface of the second manifold, wherein the first coater shim and the second coater shim each include a first insulating solution flow path and a second insulating solution flow path forming a first insulating solution slot and a second insulating solution slot for discharging insulating solution, respectively, wherein an insulating solution supply flow path for supplying insulating solution to the first insulating solution flow path and the second insulating solution flow path is formed by penetrating the middle block.

Disclosed is a battery module with improved manufacture efficiency, and a battery pack and a vehicle including the same. The battery module includes a plurality of battery cells, and a plurality of module frames configured to accommodate the plurality of battery cells, respectively, and provided as sharable frames to be coupled to each other.

Disclosed herein relates to a slot die coater including: a first die block provided with a manifold for accommodating an electrode slurry; a second die block coupled to the first die block; and a coater shim interposed between the first die block and the second die block in a form that wraps around both sides and the rear surface of the manifold, wherein at front surfaces of the first die block and the second die block, an area not sealed by the coater shim while communicating with the manifold forms an electrode slurry slot, and on the surface of the first die block and/or the second die block in contact with the coater shim, a groove formed concavely to have an open end toward the front surface of the first die block and the second die block forms an insulating solution slot.

A battery cell according to an embodiment of the present disclosure includes a first outer packaging including a first metal layer and a resin layer attached to an inner surface of the first metal layer; a second outer packaging including a second metal layer; an electrode assembly housed between the first outer packaging and the second outer packaging; an adhesion portion in which the resin layer and the second metal layer are adhered to each other; a folding portion formed by folding an edge portion of the second outer packaging around an edge portion of the first outer packaging; and a weld portion in which the first metal layer and the second metal layer are welded together in the folding portion.

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A secondary battery charging and discharging device related to one example of the present invention comprises a chamber including one or more charging spaces capable of individually accommodating trays, in which secondary batteries are accommodated, and provided with charging grippers arranged to be electrically connectable with the secondary batteries in the charging space, a thermoelectric cooling part including a thermoelectric element, and cooling fins arranged to transfer cold air from a cooling side of the thermoelectric element to surroundings, and arranged to cool air in the charging space at an upper portion of the charging space, a first fan provided to suck cooling air from the surroundings of the thermoelectric cooling part at an upper portion of the charging space and to blow the cooling air toward the secondary batteries accommodated in the tray, and a second fan provided so that the cooling air flows along the longitudinal direction of the secondary battery by sucking air in parallel with the longitudinal direction of the secondary battery at a lower portion of the charging space.

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[Summary] A battery cell assembly according to one example of the present invention may comprise a plurality of battery cells, a frame on which the plurality of battery cells is mounted, an upper cover coupled with the upper surface of the frame to cover the upper portions of the plurality of battery cells, a first soft portion interposed between the frame and the upper cover and having a plurality of first soft holes through which the upper portions of the plurality of battery cells are each fitted and passed, and a lower cover coupled with the lower surface of the frame in a state where the lower portions of the plurality of battery cells are partially inserted.

A battery pack according to embodiments of the present disclosure includes: a pack frame on which a plurality of battery cell assemblies are mounted; at least one venting part located on a side face of the pack frame, wherein the side face of the pack frame is a cavity structure in which an empty space is formed between an outer face of the pack frame and an inner face of the pack frame; at least one pair of guide plates are disposed in the empty space formed on the side face of the pack frame formed with the venting part; the pair of guide plates are disposed symmetrically with each other with the venting part interposed between them; and the pair of guide plates are disposed so as to have an inclination that is lifted in a direction toward the venting part with respect to the lower part of the pack frame.

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