Patent ID: 8822052

Claim:
A battery cartridge comprising: four unit cells for generating current and including first to fourth unit cells, wherein the first unit cell and the second unit cell are coupled in a close contact state, the third unit cell and the fourth unit cell are coupled in a close contact state, and a gap is formed between the second unit cell and the third unit cell, wherein each of the unit cells has a sealing portion provided at edges around the unit cell; an inner cartridge member receiving the four unit cells and interposed between the second unit cell and the third unit cell to form the gap, wherein the central cartridge member has a plurality of side holes; an upper cover coupled to the central cartridge member; an upper cartridge member coupled to the central cartridge member, interposed between the upper cover and the central cartridge member, and having an upper contact surface contacting the sealing portion of the first unit cell; a lower cover coupled to the central cartridge member; a lower cartridge member coupled to the central cartridge member, interposed between the lower cover and the central cartridge member, and having a lower contact surface contacting the sealing portion of the fourth unit cell; and a plurality of cartridge supports inserted into the side holes, and disposed between the sealing portions of the first unit cell and the second unit cell to contact the sealing portions of the first unit cell and the second unit cell, and between the sealing portions of the third unit cell and the fourth unit cell to contact the sealing portions of the third unit cell and the fourth unit cell, wherein the upper cover contacts the upper contact surface of the upper inner cartridge member and contacts a top surface of the first unit cell except the sealing portion of the first unit cell, wherein the lower cover contacts the lower contact surface of the lower inner cartridge member and contacts a bottom surface of the fourth unit cell except the sealing portion of the fourth unit cell.