A power battery module, comprising: a battery accommodating assembly having a plurality of separators, each separator comprising: a separator body having a front portion defining a front accommodating groove and a rear portion; a left cover disposed at a left end of the separator body; and a right cover disposed at a right end of the separator body, wherein adjacent separators are detachably connected with each other, and the front accommodating groove of one of the adjacent separators and the rear portion of the separator body of the other of the adjacent separators define a battery chamber; a battery group comprising a plurality of batteries which are accommodated in the battery chambers correspondingly, each battery having an electrode terminal; a power connection member connected with the electrode terminals of adjacent batteries; and a power connection line connected with the power connection member; characterized in that a snapping hole is formed in at least one of upper and lower walls of the front accommodating groove, and the battery module comprises a line snap-fit comprising a snap-fit body defining a line groove penetrating the snap-fit body in a length direction of the snap-fit body, and a snap-fitting portion disposed on an exterior of the snap-fit body and having a line clasp configured to be snapped in the snapping hole to fasten the snap-fit body to the separator; wherein the power connection line passes through and is received in the line groove. a battery accommodating assembly having a plurality of separators, each separator comprising: a separator body having a front portion defining a front accommodating groove and a rear portion; a left cover disposed at a left end of the separator body; and a right cover disposed at a right end of the separator body, wherein adjacent separators are detachably connected with each other, and the front accommodating groove of one of the adjacent separators and the rear portion of the separator body of the other of the adjacent separators define a battery chamber; a separator body having a front portion defining a front accommodating groove and a rear portion; a left cover disposed at a left end of the separator body; and a right cover disposed at a right end of the separator body, wherein adjacent separators are detachably connected with each other, and the front accommodating groove of one of the adjacent separators and the rear portion of the separator body of the other of the adjacent separators define a battery chamber; a battery group comprising a plurality of batteries which are accommodated in the battery chambers correspondingly, each battery having an electrode terminal; a power connection member connected with the electrode terminals of adjacent batteries; and a power connection line connected with the power connection member; characterized in that a snapping hole is formed in at least one of upper and lower walls of the front accommodating groove, and the battery module comprises a line snap-fit comprising a snap-fit body defining a line groove penetrating the snap-fit body in a length direction of the snap-fit body, and a snap-fitting portion disposed on an exterior of the snap-fit body and having a line clasp configured to be snapped in the snapping hole to fasten the snap-fit body to the separator; wherein the power connection line passes through and is received in the line groove.