In order to facilitate the overall simultaneous liquid exchange of the battery cells in the entire lithium slurry battery module, the lithium slurry battery module may also comprise an integral liquid-exchanging system. However, each battery cell in the lithium slurry battery module can be subjected to liquid exchanging separately or in turns through the integral liquid-exchanging system. The integral liquid-exchanging system comprises a main injection pipe, a branch injection pipe, a main discharge pipe and a branch discharge pipe. The main injection pipe is in fluid communication with the branch injection pipe and the branch injection pipe is connected to the injection interface of the battery cell. The main discharge pipe is in fluid communication with the branch discharge pipe and the branch discharge pipe is connected to the discharge interface of the battery cell. In addition, a main injection port and a main discharge port may be provided on the top lid of the cell can of the lithium slurry battery module. The main injection port is in fluid communication with the main injection pipe and the main discharge port is in fluid communication with the main discharge pipe. There may disposed a detachable sealing element on the main injection port and the main discharge port, which is used for opening or closing the main injection port and the main discharge port, for example sealing plug, bolt and so on. Or, a valve of the main injection port and a valve of the main discharge port may be provided on the main injection port and the main discharge port. With the valve of the main injection port and the valve of the main discharge port, the main injection port and the main discharge port can be opened or closed, and the total gas volume and total liquid volume injected to and discharged from the lithium slurry battery module can be controlled. With the integral liquid-exchanging system, each battery cell disposed in the inner chamber of the cell can may be directly subjected to liquid exchanging without opening the cell can of the lithium slurry battery. The overall suction from the main discharge port by the suction device enable the liquid or gas in the battery cell to be discharged through the discharge interface of the battery cell, the branch discharge pipe, the main discharge pipe and the total discharge port. The overall injection of the main injection port by using the liquid injection device enables the electrolyte or the washing liquid to be injected into the battery cell through the main injection port, the main injection pipe, the branch injection pipe, and the injection interface of the battery cell. The valve of the main injection port and the valve of the main discharge port can control the total gas volume and the total liquid volume injected to or discharged from the lithium slurry battery module. The gas volume and the liquid volume injected to or discharged from each battery cell can be controlled by the flow valve that is provided on the injection interface and the discharge interface of the shell of battery cell, so as to realize the control of the liquid-injecting volume of the entire lithium slurry battery module and each battery cell. The main injection pipe and the main discharge pipe may be filled with dry gas. Preferably, the gas pressure is larger than one atmosphere pressure, so as to improve the sealing property of the injection interface and discharge interface of the lithium slurry battery.