Lithium battery system capable of rapidly replacing lead-acid power battery and control method of lithium battery system

The invention relates to a lithium battery system capable of quickly replacing a lead-acid power battery and a control method thereof, belongs to the field of lithium batteries, and aims to solve the problem of relatively poor economy caused by the need of changing an equipment structure in the existing mode, and adopts the technical scheme that the lithium battery system capable of quickly replacing the lead-acid power battery comprises a battery pack, the anode of the battery pack is connected with an anode connector; the battery management system is respectively connected with the lithium batteries in the battery pack, an MOS switch is arranged on the battery management system, one end of the MOS switch is connected with the negative electrode of the battery pack through a current-limiting resistor and an external shunt, and the other end of the MOS switch is connected with a negative electrode connector; and one end of the relay is connected to the joint of the shunt and the current-limiting resistor, and