Automotive power supply device

An automotive power supply device comprising:

• an elongated trunk harness structure that is arranged on a floor in a central portion in a width direction of a vehicle body extending in a length direction of the vehicle body, and is provided with a battery and a power supply wiring line, wherein the power supply wiring line is a plate-shaped metal wiring line, and the terminal connection portion is connected to the metal wiring line,
• wherein the trunk harness structure is configured to supply electric power from the power supply wiring line to a plurality of loads mounted on the vehicle body,
• the trunk harness structure includes a case having a pair of side walls, a front wall, a back wall and a top wall defining an inner space, the case has shape retentionability or is self-standing, the battery is disposed within the space of the case and the power supply wiring line is also disposed within the space of the case and connected to the battery, wherein the power supply wiring line is laid in a loop shape so as to be disposed along an inner peripheral surface of the case, wherein the trunk harness structure is further provided with a signal wiring line that is arranged in parallel to the power supply wiring line;
• and
• the trunk harness structure is provided with a plurality of terminal connection portions that are arranged at a distance with respect to each other in a longitudinal direction of the trunk harness structure, the terminal connection portions each including a power supply pin hole for directly connecting a power supply terminal of a load to the power supply wiring line and wherein each of the terminal connection portions of the trunk harness structure is further provided with a signal pin hole for directly connecting a signal terminal of a load to the signal wiring line.