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: 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 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 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 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: A method for assembling a secondary battery cell module by using an assembling jig including a plurality of guide rods disposed on a jig plate includes: mounting a lower frame on the jig plate while the guide rods are inserted into a plurality of arranging through-holes of the lower frame; disposing a plurality of battery cells on the lower frame; mounting an upper frame on the battery cells while the guide rods are inserted into a plurality of arranging through-holes of the upper frame; fastening the upper frame and the lower frame together; and separating the assembling jig from the upper frame and the lower frame.

Abstract: The present disclosure relates to a battery module including a busbar structure for adhesion with an electrode lead. The battery module can include a battery cell stack having a plurality of stacked battery cells, electrode leads protruding from the battery cell stack, a busbar electrically connected to the electrode leads, and a busbar frame on which the busbar is mounted. The busbar can be formed of a tongs part and a fixing part for connecting and fixing the tongs part. The electrode leads can be mounted between the tongs part of the busbar. The battery module can be manufactured through the steps of mounting a busbar in an opening part of a busbar frame, inserting an electrode lead between the tongs part of the busbar, closely adhering the busbar and the electrode lead through a jig, and removing the jig.

Abstract: A battery pack having a bottom connection type tray is provided. The battery pack includes a tray configured to load a plurality of battery modules therein, a plurality of tray terminals provided on a bottom plate of the tray, a connection wire for interconnecting the tray terminals or connecting the tray terminals to an external circuit, and a battery terminal provided in each of the battery modules to be connected to a corresponding one of the tray terminals. Terminal connection is achieved while the battery modules are assembled with the tray, and therefore, an assembly procedure is more easily performed, and the reliability of a terminal connection structure is improved. In addition, automated assembly and production using a robot are possible.

Abstract: A method for assembling a secondary battery cell module by using an assembling jig including a plurality of guide rods disposed on a jig plate includes: mounting a lower frame on the jig plate while the guide rods are inserted into a plurality of arranging through-holes of the lower frame; disposing a plurality of battery cells on the lower frame; mounting an upper frame on the battery cells while the guide rods are inserted into a plurality of arranging through-holes of the upper frame; fastening the upper frame and the lower frame together; and separating the assembling jig from the upper frame and the lower frame.

Abstract: A battery module includes: a battery cell assembly including a plurality of battery cells adjacent to each other and stacked in parallel and a plurality of electrode leads protruded from respective ones of the plurality of battery cells; and a module cover accommodating the battery cell assembly, wherein the module cover includes an upper cover part exposing the plurality of electrode leads while covering an upper surface and a side surface of the battery cell assembly and a bus bar frame part coupled with the upper cover part and integrally formed with the upper cover part at a position corresponding to the plurality of electrode leads exposed by the upper cover part, and wherein the bus bar frame part includes a plurality of bus bars electrically connected to respective ones of the plurality of electrode leads.

Abstract: A battery pack includes: a pack tray; a first x bar provided on the pack tray; a plurality of battery modules provided on the pack tray; a lateral plate for covering a lateral side of at least one of the battery modules; and a second x bar provided on the first x bar, overlapping the first x bar, and disposed in parallel to the first x bar, wherein the lateral plate forms a protrusions and depressions structure with at least one of the first x bar and the second x bar such that the lateral plate is combined with the at least one of the first x bar and the second x bar.

Abstract: A battery pack cover has irregularities formed on an upper surface portion thereof. The battery pack cover effectively prevents stress from being concentrated on a specific area, enables rigidity enhancement without adding a separate bracket, and is easily assembled when applied to packaging.

Abstract: A battery pack includes a battery cell and a bus bar electrically connected to the battery cell, wherein the bus bar includes a rupture portion configured to melt due to electric resistance heat generated by overcurrent and thus to rupture, the rupture portion having a plurality of through-holes therein.

Abstract: A method for assembling a secondary battery cell module by using an assembling jig including a plurality of guide rods disposed on a jig plate includes: mounting a lower frame on the jig plate while the guide rods are inserted into a plurality of arranging through-holes of the lower frame; disposing a plurality of battery cells on the lower frame; mounting an upper frame on the battery cells while the guide rods are inserted into a plurality of arranging through-holes of the upper frame; fastening the upper frame and the lower frame together; and separating the assembling jig from the upper frame and the lower frame.

Abstract: A battery pack having a bottom connection type tray is provided. The battery pack includes a tray configured to load a plurality of battery modules therein, a plurality of tray terminals provided on a bottom plate of the tray, a connection wire for interconnecting the tray terminals or connecting the tray terminals to an external circuit, and a battery terminal provided in each of the battery modules to be connected to a corresponding one of the tray terminals. Terminal connection is achieved while the battery modules are assembled with the tray, and therefore, an assembly procedure is more easily performed, and the reliability of a terminal connection structure is improved. In addition, automated assembly and production using a robot are possible.

Abstract: A battery pack includes: a pack tray; a first x bar provided on the pack tray; a plurality of battery modules provided on the pack tray; a lateral plate for covering a lateral side of at least one of the battery modules; and a second x bar provided on the first x bar, overlapping the first x bar, and disposed in parallel to the first x bar, wherein the lateral plate forms a protrusions and depressions structure with at least one of the first x bar and the second x bar such that the lateral plate is combined with the at least one of the first x bar and the second x bar.