A power battery module includes a battery accommodating assembly having a plurality of separators, the separator comprising: a separator body; a left cover; and a right cover, in which adjacent separators are detachably connected with each other; a battery group; and a signal collection and power connection assembly mounted on the separator and comprising: a substrate; a power connection member fixed to the substrate; a power connection line disposed on the substrate and includes a first end connected with the power connection member; a signal collection line disposed on the substrate and includes a first end connected with the power connection member; and a signal collection member disposed on the substrate and connected with the signal collection line.
