Protective circuit board for external interface of lithium battery pack

The utility model relates to the technical field of circuit boards, in particular to a protective circuit board for external interfaces of a lithium battery pack, which comprises a bottom plate and a shell, interface slots are uniformly distributed on a mounting plate, corresponding interfaces are respectively arranged at the centers of the interface slots, baffles corresponding to the interface slots are mounted inside the mounting plate, and the baffles are connected with the shell. Grooves located on one sides of the corresponding interface grooves are formed in the mounting plate, protective plates arranged between the baffles are mounted in the interface grooves, heat dissipation grooves are formed in the top and the bottom of the front panel respectively, and heat dissipation holes are evenly distributed in the back panel. The interface slot is mounted through the mounting plate, so that the lithium battery pack can be conveniently charged and discharged through the interface; the front panel and the ba