The invention relates to the field of lithium batteries and discloses a lithium ion battery pack and a lithium ion battery pack combination. The lithium ion battery pack comprises a battery management system circuit board, a fixing plastic part, an anode terminal, a cathode terminal, an upper cover, a plurality of lithium ion battery modules and a plurality of conductive connecting plates, wherein each lithium ion battery module comprises a frame wrapping the lithium ion battery module, an anode conductive terminal, a cathode conductive terminal and a plurality of single batteries, all the lithium ion battery modules are stacked mutually on a stacking surface to form a stacked whole, the fixing plastic part is fixed above the stacked whole, the battery management system circuit board is fixed on the top of the fixing plastic part, the upper cover fixedly covers the top of the battery management system circuit board, and the anode terminal and the cathode terminal are fixed on the top of the upper cover to be respectively electrically connected with the battery management system circuit board.