A signal collection and power connection assembly for a power battery module, comprising: a substrate; a power connection member fixed on the substrate; a power connection line; a signal collection line; and a signal collection member disposed on the substrate and coupled with the signal collection line, wherein the power connection line is formed by a first sheet-like conductor disposed on the substrate and defines a first terminal of the power connection line coupled with the power connection member and a second terminal of the power connection line; the signal collection line is formed by a second sheet-like conductor disposed on the substrate and defines a first terminal of the signal connection line coupled with the power connection member and a second terminal of the signal connection line; the assembly is configured as a flexible printed circuit board, and the power connection member, the power connection line and the signal collection line are formed on the flexible printed circuit board by etching; the flexible printed circuit board comprises a conductive metal foil and a protective film covering two sides of the conductive metal foil, the protective film is a part of the substrate, and the power connection member, the power connection line and the signal collection line are formed by etching the conductive metal foil; and the assembly further comprises a common line formed by a sheet-like conductor disposed on the substrate, and the common line defines a first terminal coupled with the power connection member and a second terminal coupled with the first terminals of the power connection line and the signal collection line, respectively. a substrate; a power connection member fixed on the substrate; a power connection line; a signal collection line; and a signal collection member disposed on the substrate and coupled with the signal collection line, wherein the power connection line is formed by a first sheet-like conductor disposed on the substrate and defines a first terminal of the power connection line coupled with the power connection member and a second terminal of the power connection line; the signal collection line is formed by a second sheet-like conductor disposed on the substrate and defines a first terminal of the signal connection line coupled with the power connection member and a second terminal of the signal connection line; the assembly is configured as a flexible printed circuit board, and the power connection member, the power connection line and the signal collection line are formed on the flexible printed circuit board by etching; the flexible printed circuit board comprises a conductive metal foil and a protective film covering two sides of the conductive metal foil, the protective film is a part of the substrate, and the power connection member, the power connection line and the signal collection line are formed by etching the conductive metal foil; and the assembly further comprises a common line formed by a sheet-like conductor disposed on the substrate, and the common line defines a first terminal coupled with the power connection member and a second terminal coupled with the first terminals of the power connection line and the signal collection line, respectively.