Disclosed herein is a battery
cartridge-connecting
system for battery modules, comprising:
bus bars, each of which includes a plate-shaped bar body,
coupling parts, and
electrical connection parts; a base plate, to which the
bus bars are easily mounted; and a
printed circuit board (PCB), which is easily coupled to the
bus bars and is mounted to the base plate in a compact structure. The present invention also provides a battery module and a medium- or large-sized
battery system including the battery
cartridge-connecting
system. According to the present invention, the battery
cartridge-connecting
system easily accomplishes the
electrical connection and the mechanical
coupling in the compact-structured battery module or
battery system. In addition, the battery cartridge-connection system has excellent electrical characteristics, such as electric resistance at the connected parts, after the
electrical connection is completed, and excellent
mechanical strength to external impacts or vibrations after the mechanical
coupling is completed. Furthermore, the battery cartridge-connecting system prevents a risk of an engineer or a user being exposed to the electrical short circuits when the battery module or the
battery system is manufactured or when the battery module or the battery system is repaired.