A power battery module, comprising: a battery accommodating assembly having a plurality of separators, the 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 other of adjacent separators define a battery chamber; a battery group comprising a plurality of batteries accommodated in the battery chambers correspondingly, the battery having an electrode terminal; characterized by a signal collection and power connection assembly mounted on the separator and comprising: a substrate; a power connection member fixed to the substrate and connected with the electrode terminal; a power connection line formed by a first sheet-like conductive element disposed on the substrate, and defining a first end electrically connected with the power connection member and a second end; a signal collection line formed by a second sheet-like conductive element disposed on the substrate, and defining a first end connected with the power connection member and a second end; a signal collection member disposed on the substrate and connected with the signal collection line; and a common line formed by a third sheet-like conductor disposed on the substrate, wherein the common line has a first end coupled with the power connection member and a second end coupled with the first ends of the power connection line and the signal collection line respectively. a battery accommodating assembly having a plurality of separators, the 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 other of 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 other of adjacent separators define a battery chamber; a battery group comprising a plurality of batteries accommodated in the battery chambers correspondingly, the battery having an electrode terminal; characterized by a signal collection and power connection assembly mounted on the separator and comprising: a substrate; a power connection member fixed to the substrate and connected with the electrode terminal; a power connection line formed by a first sheet-like conductive element disposed on the substrate, and defining a first end electrically connected with the power connection member and a second end; a signal collection line formed by a second sheet-like conductive element disposed on the substrate, and defining a first end connected with the power connection member and a second end; a signal collection member disposed on the substrate and connected with the signal collection line; and a common line formed by a third sheet-like conductor disposed on the substrate, wherein the common line has a first end coupled with the power connection member and a second end coupled with the first ends of the power connection line and the signal collection line respectively. a substrate; a power connection member fixed to the substrate and connected with the electrode terminal; a power connection line formed by a first sheet-like conductive element disposed on the substrate, and defining a first end electrically connected with the power connection member and a second end; a signal collection line formed by a second sheet-like conductive element disposed on the substrate, and defining a first end connected with the power connection member and a second end; a signal collection member disposed on the substrate and connected with the signal collection line; and a common line formed by a third sheet-like conductor disposed on the substrate, wherein the common line has a first end coupled with the power connection member and a second end coupled with the first ends of the power connection line and the signal collection line respectively.