Patent ID: 7405022

Claim:
A battery pack including a plurality of cartridges, which are stacked one on another while the cartridges are electrically connected with each other, wherein the cartridges are stacked in an alternate orientation manner, in which electrode terminals of a second one of the cartridges adjacent to a first one of the cartridges are arranged at an angle of 90 degrees or more to electrode terminals of the first one of the cartridges, and electrode terminals of a third one of the cartridges adjacent to the second one of the cartridges are arranged in the same orientation as the electrode terminals of the first one of the cartridges, and wherein the electrode terminals of the first one of the cartridge are electrically connected to the electrode terminals of the third one of the cartridges, respectively, the electrode terminals of the second one of the cartridge are electrically connected to electrode terminals of a fourth one of the cartridges, respectively, and electrode terminals of the last one of the cartridge are electrically connected to electrode terminals of the neighboring one of the cartridges, respectively.