Disclosed herein is a battery
cartridge for middle- or large-sized battery packs, which has one or more unit cells mounted therein. The battery
cartridge is generally constructed in a plate-shaped structure for easy stacking, and connecting members for
electrical connection between cartridges are constructed in a
coupling structure in which the connecting members are coupled with each other during the stacking of the cartridges. When a plurality of cartridges are stacked one on another so as to construct a middle- or large-sized
battery pack, the mechanical
coupling between the cartridges is accomplished, and, at the same time, the
electrical connection between the cartridges is also accomplished, whereby the
assembly of the cartridges is easily accomplished, and the risk of short circuits is prevented during the
assembly or the use of the cartridges. Furthermore, a middle- or large-sized
battery pack manufactured using the battery
cartridge according to the present invention has a stable compact structure. Consequently, the middle- or large-sized
battery pack is preferably used as a power source for electric vehicles or
hybrid electric vehicles.