A power battery module includes 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; a right cover, a battery group, a power connection member, a power connection line and a line snap-fit; in which 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, and a snapping hole is formed in at least one of upper and lower walls of the front accommodating groove.