Battery cartridge-connecting system for battery module

The present invention is provided with a bus bar made of a plate-like body, coupling parts, and electrical connection; A base plate with the bus bars can be easily mounted; And the bus can be easily combined bar and a battery module and a medium- or large-sized battery including the battery cartridge-connecting system, and that for a battery module that is configured to include a PCB (Printed Circuit Board) that can be compactly mounted to the base plate provide system. According to the invention, it is possible to manufacture a battery module or a battery system of a compact structure as a whole, and yet easily and to achieve an electrical connection and a mechanical fastening and electrical properties and external, such as such a connection, even after the electrical resistance of the connection region only the mechanical stiffness of the impact vibration to be excellent as well, there is an effect capable of preventing the short circuit risk of the user or maintenance worker, etc. course of the manufacturing process or after.