Lithium ion battery module and application thereof

The invention provides a lithium ion battery module and application thereof. The lithium ion battery module comprises a plurality of core bodies, wherein the core bodies are roll cores, stacked cores or soft package batteries, one end of each core body is respectively provided with a positive electrode lug and a negative electrode lug, the positive electrode lugs and the negative electrode lugs of the plurality of core bodies realize series connection and/or parallel connection of the core bodies through connecting sheets, and a module total positive electrode and a module total negative electrode are formed; a plurality of partition members, each of which is used for accommodating the single core body and physically separating each core body, the partition members having a structure with an upper opening; a shell and a cover plate, wherein after the shell and the cover plate are assembled, the internal space is used for accommodating the plurality of partition parts and the core bodies in the partition parts