POWER SUPPLY SYSTEM OF VEHICLE

PROBLEM TO BE SOLVED: To provide a power supply system of a vehicle reduced in the total weight of a power supply line.SOLUTION: The power supply system of a vehicle comprises: a power storage device 11 arranged at a front part 2 of a vehicle 1; a front relay device 21 that is arranged at the front part 2 of the vehicle 1 and distributes a power supply to a first electric load 61 including an electric load included at the front part 2 of the vehicle 1; a central relay device 22 that is arranged in a vehicle interior 3 and distributes the power supply to a second electric load 62 including an electric load included in the vehicle interior 3; a rear relay device 23 that is arranged at a rear part of the vehicle 1 and distributes the power supply to a third electric load 63 including an electric load included at the rear part of the vehicle 1; a first power supply line 41 that connects the power storage device 11 to the front relay device 21; a second power supply line 42 that connects the front relay device 21 to the central relay device 22; and a third power supply line 43 that connects the front relay device 21 to the rear relay device 23. 【課題】電源ラインの総重量が軽量化された車両の電源供給システムを提供する。【解決手段】車両１の前部２に配設された蓄電装置１１と、車両１の前部２に配設され、車両１の前部２に備えられた電気負荷を含む第１電気負荷６１に電源を分配する前部中継装置２１と、車室３内に配設され、車室３内に備えられた電気負荷を含む第２電気負荷６２に電源を分配する中央部中継装置２２と、車両１の後部に配設され、車両１の後部に備えられた電気負荷を含む第３電気負荷６３に電源を分配する後部中継装置２３と、蓄電装置１１と前部中継装置２１とを接続する第１電源ライン４１と、前部中継装置２１と中央部中継装置２２とを接続する第２電源ライン４２と、前部中継装置２１と後部中継装置２３とを接続する第３電源ライン４３とを有する。【選択図】図１