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.