The present disclosure provides a battery module, which comprises: a plurality of mono-batteries arranged in a manner that side surfaces are adjacent to each other; an insulative casing receiving the plurality of mono-batteries; a supporting frame fixed in the insulative casing, provided with a potting hole, and holding the plurality of mono-batteries therein; and a separating body which is formed by injecting via the potting holes and curing and is potted among the adjacent mono-batteries, so as to allow the plurality of mono-batteries to be insulated and isolated from each other. When one mono-battery is involved in a safety problem and leaks, other mono-batteries are not affected due to the isolation of the separating body potted among the adjacent mono-batteries, so as to improve the safety performance of the battery module. In addition, the battery module has the advantages of simple structure, small size, and low cost.