Abstract: A battery pack includes a pack cover including an upper cover and a lower cover and having an empty space inside, edge portions of each of the upper cover and the lower cover being coupled to each other, and a battery module including a plurality of battery cells, a module case in which the plurality of battery cells is received, and a side frame having one side coupled to the module case and the other side interposed between the upper cover and the lower cover and configured to be coupled to the edge portions of each of the upper cover and the lower cover.

Abstract: Disclosed is a battery module with improved energy density and cooling efficiency. To achieve the object, the battery module according to the present disclosure includes a plurality of cylindrical battery cells electrically connected to each other and arranged in a horizontal direction, an upper frame mounted on the plurality of cylindrical battery cells, and a lower frame mounted below the plurality of cylindrical battery cells, wherein a pressing portion is formed in any one of the upper frame and the lower frame to elastically press the plurality of cylindrical battery cells in a horizontal inward direction for a dense arrangement of the plurality of cylindrical battery cells.

Abstract: The present invention relates to a battery cell that can include an electrode assembly configured with two or more unit stacks connected to each other in series or in parallel, a battery case configured to receive the electrode assembly therein, and an insulative protection member configured to protect an electrode tab portion of the unit stacks. The overall length of the battery case can be three or more times the overall width of the battery case. A positive electrode lead and a negative electrode lead can extend outwards from the battery case protruding in opposite directions. A plurality of unit stacks can be used to implement a long battery cell, and a connection portion at which the plurality of unit stacks are connected is reinforced to improve safety of the battery cell.

Abstract: The present invention provides a heatsink, which is coupled to a pack tray, on which a plurality of secondary batteries are mounted, and comprises an inlet and an outlet so that cooling water is introduced into and discharged from a chamber therein, the heatsink comprising: a dimple convexly protruding to the inside of the chamber to form a flow path of the cooling water, wherein the dimple is provided in plurality, and the plurality of dimples are spaced apart from each other, wherein the dimples are disposed so that a gap between the dimples adjacent to each other in a specific area and a gap between the dimples adjacent to each other in the other area are different from each other. In the present invention having the above-described constituents, the gap between the dimples may vary to prevent deformation and bending in the specific direction.

Abstract: Provided are a battery pack with structural stability of battery modules and improved energy density, and a vehicle comprising the same. The battery pack according to the present disclosure includes at least one battery module and a pack case for receiving the battery module, the battery module including a battery cell stack including at least one battery cell, and a pair of end plates provided in close contact with front and rear sides of the battery cell stack on two sides of a lengthwise direction of the battery cell, and the pack case including a tray in which the battery module is mounted on an upper surface, and a top cover of which an outer periphery is coupled in contact with an outer periphery of the tray on the upper surface of the tray when the battery module is received inside, and wherein the end plates provide a mechanical support to protect the battery cell.

Abstract: Discussed is an underbody for a vehicle including a tray member fastened to a lower portion of a vehicle body frame and including a receiving portion having a structure with an open lower surface to accommodate a battery module; and a cover member to cover the open lower surface of the receiving portion, wherein the cover member includes a flow path to circulate a refrigerant fluid.

Abstract: A battery module, and a battery pack having a module housing capable of effectively increasing an energy density while enhancing the heat dissipation efficiency, includes a cell assembly having a plurality of secondary batteries; and a module housing having at least one sidewall and configured to accommodate the cell assembly in an inner space defined by the sidewall. The sidewall has at least one coolant flow path, and at least one injection hole is formed in an outer surface of the sidewall so as to extend to and communicate with the inner space.

Abstract: Disclosed is a battery module, which includes: a plurality of battery cells stacked side by side; a module case configured to accommodate the plurality of battery cells; a heatsink mounted to an outer side of the module case to cool the plurality of battery cells; and at least one heat transfer pad disposed in contact with the heatsink and the plurality of battery cells to penetrate the module case at least partially.

Abstract: Disclosed is a welding jig for welding an electrode lead of a battery cell and a sensing bus bar of a bus bar assembly to each other, and the welding jig includes a jig body disposed above the electrode lead and the sensing bus bar during the welding; and a positioning guide unit coupled to the jig body and configured to make a step correction in at least three directions when the electrode lead and the sensing bus bar are welded.

Abstract: According to the present disclosure, there is provided a battery pack. The battery pack may include a pack case having a pack tray configured to support a lower portion of battery modules. A pack cover may be configured to cover the battery modules and contact a top surface of the battery modules. A heatsink may be installed at an upper portion of the pack cover.

Abstract: Disclosed is a battery pack, which includes a plurality of battery modules and a pack case in which the battery modules are fixedly installed, the battery case includes a pack tray located at a lower portion of the battery modules, and a pack cover coupled with the pack tray to cover the battery modules, and each of the battery modules is fixedly coupled to the pack cover and includes battery cells arranged in one direction, a module case for accommodating the battery cells in an inner space thereof, and a rigid beam disposed between the battery cells inside the module case.

Abstract: A battery cell has asymmetrically formed electrode leads, and a battery module includes the same. The spatial efficiency and the mechanical strength of the battery module are improved.

Abstract: A battery cell has asymmetrically formed electrode leads, and a battery module including the same. The spatial efficiency and the mechanical strength of the battery module are improved.

Abstract: A method for producing a battery module is provided. The method for producing a battery module includes: stacking a plurality of battery cells; disposing a plurality of bus bars adjacent to electrode leads respectively provided at the plurality of battery cells; by a welding jig, pressing the electrode leads so that the electrode leads come into contact with the bus bars, respectively; and welding the electrode leads and the bus bars through an opening formed in the welding jig.

Abstract: Disclosed is a battery pack, which includes a plurality of battery modules and a pack case for fixedly installing the battery modules therein, and the pack case includes a pack tray supporting a lower portion of the battery modules; and a pack cover coupled with the pack tray to cover the battery modules and having a terminal connection unit coupled to at least one side of each battery module and provided to an inner surface of a top thereof to electrically connect electrode terminals of the battery modules.

Abstract: A laser welding jig includes a jig body configured to cover the bus bar unit during welding. A plurality of welding slits are formed at the jig body so that electrode leads and at least one lead bus bar are exposed out of the jig body for the welding. A plurality of bolt insert portions are provided between plurality of welding slits. The welding jig also includes at least one bolt insert hole into which at least one pressing bolt is inserted, and a pair of lead adhering blocks provided at a rear surface of each of the bolt insert portions and configured to be spaced from each other as the pressing bolt is inserted so that the electrode leads are adhered to the lead bus bar.

Abstract: Provided is a polarizing plate and a display device. The polarizing plate has excellent durability against an external environment, for example, moisture, due to a protective film of a polarizer, and can prevent color distortion upon observation with polarized sunglasses, and a display device comprising the polarizing plate.

Abstract: A battery module including a tray having a battery cell receiving portion, a first cell assembly being in the battery cell receiving portion of the tray, the first cell assembly being a plurality of battery cells electrically connected to each other and arranged on a single layer, and a second cell assembly being in the battery cell receiving portion of the tray, the second cell assembly being a plurality of battery cells electrically connected to each other and arranged on a single layer is provided. Each battery cell includes a cell body. A plurality of first receiving grooves, which are defined by a space between adjacent battery cells of the first cell assembly, are provided on one surface of the first cell assembly. The cell body of each battery cell of the second cell assembly is accommodated in a corresponding one of the first receiving grooves of the first assembly.

Abstract: The present invention relates to a bus bar for connecting an electrode lead and a battery module comprising same. The bus bar has a surface structure having a concavity and convexity pattern aligned in one direction on a connection part with an electrode lead, and thus the weldability with the electrode lead can be enhanced.

Abstract: Disclosed is a battery pack with increased fabrication efficiency. To achieve the object, the battery pack according to the present disclosure includes at least one battery module including a plurality of secondary batteries placed and arranged in a horizontal direction and electrically connected to each other, and a cell frame having a fixing tube configured to fix the plurality of secondary batteries in a predetermined arrangement, the fixing tube being disposed between the plurality of secondary batteries, extending in the horizontal direction and having two open ends, and a fixing rod extending in a direction and inserted into the fixing tube in the horizontal direction.