Power supply apparatus for vehicle

摘要

In a hybrid car using a high voltage battery (12) in combination with an auxiliary machinery battery (16) both arranged in a rear portion of a vehicle, a fusible link box (18) is provided in the vicinity of the 12V auxiliary machinery battery (16). A power line (38) serving as an output line from a DC/DC converter (14) converting a voltage between the high voltage battery (12) and the battery (16) is not returned to an engine room but connected to the fusible link box (18). An EFI unit (24) of high importance should maintain its operation even when a fusible link (44) is blown due to flow of an excessive current when the battery (16) is charged from the DC/DC converter (14). Here, a power line (34) and a fusible link (42) are dedicated to the EFI unit (24) consuming relatively small power, so that a path for routing the power line (34) is more readily ensured. <IMAGE>