Abstract: A battery cell according to an embodiment of the present disclosure includes a cell case having a can accommodating an electrode assembly therein and a cap plate connected to the can, and a vent notch formed in at least one of both surfaces of the cap plate, wherein the vent notch includes at least one first notch portion formed based on a first path, at least one second notch portion formed based on a second path, and a connection notch portion connecting the first notch portion and the second notch portion.

Abstract: A battery assembly includes a cell stack including a plurality of battery cells stacked together, a busbar assembly coupled to the cell stack and including a busbar electrically connected to an electrode lead of at least one of the battery cells, a plate unit configured to cover at least a portion of a side surface of the cell stack, a sensing unit coupled to the busbar assembly and disposed outside of the cell stack, and a cell monitoring unit installed on the plate unit and coupled to the sensing unit.

Abstract: The present disclosure relates to a current collector plate and a battery cell including the same. A current collector plate according to one embodiment of the present disclosure is a disc-shaped current collector plate having a raised surface including a central axis, wherein the current collector plate may include: a raised space formed by the raised surface being raised; a raised opening defining an entrance of the raised space, the area of the raised opening being larger than the area of the raised surface; a connecting surface including an inner surface of the raised space; a base surface including a surface other than the raised surface and the connecting surface; and a plurality of slits.

Abstract: A device for manufacturing a battery cell is provided. The device includes a first pressing device including a first mold portion configured to press one side of a base material, and a second mold portion including a first protrusion configured to press the other side of the base material and configured to support the base material; and a second pressing device including a third mold portion including a second protrusion configured to press the one side of the base material, and a fourth mold portion including a third protrusion configured to press the other side of the base material, and configured to support the base material, wherein a first width of the first protrusion is greater than a third width of the third protrusion.

Abstract: A battery pack includes a lower plate on which one or more cell assemblies are disposed, one or more support frames coupled to the lower plate, and one or more reinforcing members coupled to one side of the support frame to form a venting path. The reinforcing member includes a material different from a material of the support frame.

Abstract: A battery pack includes: a first cooling plate including a first cooling path, along which a refrigerant is circulated, and a first inlet pipe connected to the first cooling path; a second cooling plate including a second cooling path, along which a refrigerant is circulated, and a second inlet pipe connected to the second cooling path and sealingly engaged to the first inlet pipe; a main supply pipe branching from the first inlet pipe or the second inlet pipe and supplying a refrigerant to the first inlet pipe and the second inlet pipe; and a pack unit body including at least one battery cell and disposed between the first cooling plate and the second cooling plate.

Abstract: A battery cell includes a cell case including a case body and a cap plate, an electrode assembly, an electrode terminal, and an injection hole cover covering an injection hole formed in the cap plate. The cap plate includes a step portion recessed toward an inside of the cell case, and a recessed space formed on at least a portion of a periphery of the step portion and recessed toward an outside of the cell case, the injection hole cover includes a cover body installed on the step portion, and a convex portion extending from the cover body to be inserted into the injection hole, and the recessed space has a shape overlapping at least a portion of the cover body when the cover body is projected in a lateral direction of the cover body.

Abstract: The present disclosure provides battery cell including: an electrode assembly; a cell case in which an accommodation space for accommodating the electrode assembly is formed and one side thereof is open and; a cap plate covering an open portion of the cell case and coupled to the cell case; and a magnetic member providing magnetic force to the cap plate so that the cap plate may maintain an aligned position with respect to the cell case, wherein the magnetic member is disposed on at least one of the electrode assembly, the cell case or the cap plate.

Abstract: A battery pack includes a pack housing including a plurality of accommodation spaces; a partition member coupled to the pack housing and partitioning a space of the pack housing into the plurality of accommodation spaces; a plurality of pack units respectively disposed in the plurality of accommodation spaces; a first pack cover in contact with the partition member and covering at least one of the plurality of accommodation spaces or the pack unit; and a second pack cover covering the first pack cover and the pack housing.

Abstract: A battery pack includes a cell assembly unit including a plurality of battery cells and a bus bar configured to electrically connect the plurality of battery cells, a frame unit accommodating the cell assembly unit, and a bracket unit fixing the cell assembly unit to the frame unit. The bracket unit and the frame unit form a flow path through which a gas is discharged. A reverse flow prevention member is disposed between the bus bar and the bracket unit. The reverse flow prevention member includes a plurality of gas permeation holes, each of which extends from one end facing the bus bar and leads to another end facing the flow path.

Abstract: A battery cell according to the present disclosure may include: an electrode assembly including a first electrode, a second electrode and a separator; a case accommodating the electrode assembly and electrically connected to the first electrode; a cap plate connected to the case; a terminal member provided on the cap plate; and a pin member disposed on a core of the electrode assembly and electrically connected to the second electrode and the terminal member.

Abstract: The present disclosure relates to a battery cell and manufacturing method thereof. The battery cell according to an embodiment of the present disclosure includes a case receiving an electrode assembly, and an electrode terminal electrically connected to the electrode assembly, wherein the case includes a vent portion having a lower hardness than other regions of the case.

Abstract: A battery cell includes: a case accommodating an electrode assembly in an accommodating space; a cap plate coupled to at least one side of the case; a vent provided in the case or the cap plate; and a venting cover disposed to cover the vent, and provided to be opened by pressure acting from the accommodating space to the outside of the case, wherein the venting cover includes a venting sheet provided to be opened by a predetermined amount of pressure, and including a first surface facing the vent and a second surface opposite to the first surface; and a venting cap having a support portion supporting the first surface of the venting sheet.

Abstract: A secondary battery includes an electrode assembly including a cathode and an anode, a case in which the electrode assembly is housed, and a cap assembly which covers the case. The cap assembly includes a cap plate which covers the case and includes a terminal hole formed therein, a gasket disposed on the cap plate around the terminal hole, and a rivet which is inserted into the terminal hole to be coupled to the cap plate through the gasket, and includes a first protrusion part inserted into an upper portion of the gasket.

Abstract: A fusion tip of a heat fusion machine assembling a sub-material including a boss or rib with a base material and then heat-fusing the boss or rib to fix the sub-material and the base material includes a base tip including a pinhole formed vertically in a center and a tip head contacting the boss or rib during heat fusion and a fusion pin positioned in the pinhole and configured to move up and down separately from the base tip.

Abstract: A battery cell includes a cell case including a sidewall and a top plate having a through-hole formed therein; an electrode terminal coupled to the through-hole and having a coupling groove formed in a bottom portion; an electrode assembly; and a first current collector electrically connecting the electrode terminal to the electrode assembly, wherein the first current collector includes a connection terminal having a protrusion inserted and coupled to the coupling groove, wherein the protrusion is coupled to the electrode terminal by welding performed on an outer side of the cell case, and wherein, in a welded region where the protrusion and the electrode terminal are welded, a thickness of the connection terminal has a value equal to or greater than that of a thickness of the electrode terminal.

Abstract: The present disclosure provides a battery cell including: a cell case including a side wall having an accommodation space and an upper plate having a through-hole; an electrode terminal coupled to the through-hole and having a coupling hole; an electrode assembly disposed in the accommodation space; and a first current collector electrically connecting the electrode terminal and the electrode assembly, where the first current collector includes a connection terminal having a protrusion inserted into the coupling hole, a welding space is formed between an upper end of a side surface of the protrusion and an inner surface of the coupling hole, and a welding area is formed in the welding space by welding performed on an outer side of the cell case in a state in which the protrusion is inserted into the coupling hole.

Abstract: A battery cell including an electrode assembly, a case accommodating the electrode assembly, and a cap assembly sealing an opening of the case is provided. The cap assembly includes a terminal plate at least partially exposed to an external space of the cap assembly, a cap plate coupled to the case, a rivet connecting the terminal plate and the cap plate, and a gasket surrounding at least a portion of the rivet. The rivet includes a pillar portion at least partially surrounded by the cap plate, a protrusion portion extending from an outer peripheral surface of the pillar portion, and a first flange located between the terminal plate and the gasket. The gasket includes a first sealing region at least partially located between the protrusion portion and the cap plate, and a second sealing region located between the first flange and the cap plate.

Abstract: A battery cell includes a cell case including a side wall forming an accommodation space therein and a top plate having a through-hole formed therein, an electrode terminal coupled to the through-hole and having a coupling groove formed in a bottom portion of the electrode terminal, an electrode assembly disposed in the accommodation space of the cell case, and a first current collector electrically connecting the electrode terminal and the electrode assembly. The first current collector includes a connection terminal having a protrusion screw-coupled to the coupling groove, and the coupling groove includes a second screw thread coupled to a first screw thread formed on an outer peripheral surface of the protrusion.

Abstract: A battery cell of the present disclosure includes: an electrode assembly including a cathode, an anode, and a separator disposed between the cathode and the anode; and an exterior material accommodating the electrode assembly therein, wherein the exterior material includes: a first region including a notch portion provided on an outer surface; and a second region surrounding the first region, wherein the tensile strength of the first region is provided to be lower than the tensile strength of the second region.