Wire harness

Abstract

To provide a wire harness which can supply power properly to various apparatuses equipped in a vehicle.SOLUTION: A wire harness WH includes: a power supply line 20 for supplying power from a power source B2 equipped in a vehicle V to an apparatus D equipped in the vehicle V; and a power voltage unit 40 provided in the power supply line 20, the power voltage unit converting the voltage of power supplied from the power source B2 and outputting the voltage. That configuration allows the wire harness WH to properly supply power to various apparatuses D equipped in the vehicle V.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wire harness. [Background technology]

[0002] For example, Patent Document 1 discloses a wire harness for supplying power to various devices installed in a vehicle. This wire harness includes a power line connected to a single vehicle battery that outputs a predetermined first battery voltage, a power control box that receives the first battery voltage via the power line, supplies the received first battery voltage to a first device that operates on the first battery voltage, and reduces the received first battery voltage to a second battery voltage lower than the first battery voltage and supplies the second battery voltage to a second device that operates on the second battery voltage, a first supply line provided between the power control box and the first device for supplying the first battery voltage to the first device, and a second supply line provided between the power control box and the second device for supplying the second battery voltage to the second device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-222085 A Summary of the Invention [Problem to be solved by the invention]

[0004] By the way, this wire harness consolidates not only fuses, relays, branches, etc., but also a voltage conversion function within the power control box, thereby realizing power supply to each device in a situation where devices with different operating voltages are mixed. However, there is room for further improvement, for example, in terms of the placement of the voltage conversion function.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a wire harness that can properly supply power to various devices mounted on a vehicle. [Means for solving the problem]

[0006] In order to achieve the above object, a wire harness according to the present invention includes a power supply line that supplies power from a power source mounted in a vehicle to an apparatus mounted in the vehicle, and a voltage converter that is provided in the power supply line and converts and outputs the voltage of the power supplied from the power source. Effect of the Invention

[0007] The wire harness according to the present invention has an effect of being able to properly supply electric power to various devices mounted on a vehicle. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic block diagram showing a schematic configuration of a power supply system to which a wire harness according to an embodiment is applied. [Diagram 2] FIG. 2 is a schematic block diagram showing a schematic configuration of a vehicle to which the wire harness according to the embodiment is applied. [Diagram 3] FIG. 3 is a schematic perspective view illustrating a schematic configuration of a voltage converter of the wire harness according to the embodiment. [Figure 4] FIG. 4 is a schematic perspective view illustrating a schematic configuration of another example of the voltage converter of the wire harness according to the embodiment. [Diagram 5] FIG. 5 is a schematic perspective view illustrating a schematic configuration of another example of the voltage converter of the wire harness according to the embodiment. [Figure 6] FIG. 6 is a schematic perspective view illustrating a schematic configuration of another example of the voltage converter of the wire harness according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same.

[0010] [Embodiment] The wire harness WH according to this embodiment shown in Figs. 1 and 2 is applied to a power supply system Sys mounted on a vehicle V. The power supply system Sys is a system that supplies power to various devices D mounted on the vehicle V. The devices D are load devices that perform various functions in the vehicle V by being operated and driven by the power supplied from the power supply system Sys. The devices D are, for example, driving system actuators (motor generators, steering devices, braking devices, etc.), body system devices (lighting devices, air conditioning devices, wiper devices, electric mirrors, electric seats, electric doors, etc.), multimedia system devices (navigation devices, audio devices, meters, displays, etc.), detection system devices (sensors, cameras, radars, etc.), communication devices, electronic control units (ECUs), etc.

[0011] In recent years, with the diversification of power sources in the vehicle V, there is an increasing need to mount devices D having different drive voltages on the vehicle V. In this context, the power supply system Sys is required to appropriately supply power to a plurality of devices D having different drive voltages.

[0012] As described above, the wire harness WH of the present embodiment realizes a configuration capable of appropriately supplying power to various devices D mounted on the vehicle V in a situation where devices D with different drive voltages are mixed. Hereinafter, each configuration of the wire harness WH, etc. will be described in detail with reference to each drawing.

[0013] In the following description, the device D is described as including a first device D1 driven by a first voltage V1 and a second device D2 driven by a second voltage V2 as a plurality of devices D with different drive voltages. The first voltage V1 is, for example, a voltage of 30V or more and 60V or less. On the other hand, the second voltage V2 is a voltage lower than the first voltage V1, for example, a voltage higher than 0V and lower than 30V. Here, as an example, the first voltage V1 is described as "48V" and the second voltage V2 is described as "12V". That is, here, the first device D1 is described as a 48V-driven device driven by a voltage of 48V, and the second device D2 is described as a 12V-driven device driven by a voltage of 12V. In the following, when there is no need to particularly distinguish between the first device D1 and the second device D2, they may be simply referred to as "device D".

[0014] Specifically, as shown in Figures 1 and 2, the power supply system Sys includes a high-voltage battery B1 and a 48V battery B2 that serve as power sources, and a wire harness WH that electrically connects these to each device D. Note that in Figure 2, the high-voltage battery B1 is omitted for ease of understanding.

[0015] The high-voltage battery B1 is a battery that stores electric power at a predetermined high voltage, and is a first power source that can supply electric power at the predetermined high voltage. The high-voltage battery B1 typically has a higher voltage than the 48V battery B2, for example, a voltage (battery voltage) of about 300V to 400V. The high-voltage battery B1 of this embodiment is electrically connected to the 48V battery B2 via a DC / DC converter B1A and supplies electric power to the 48V battery B2. The DC / DC converter B1A is a transformer that converts the voltage of direct current electric power. The DC / DC converter B1A is electrically connected to the 48V battery B2, converts the voltage of the electric power from the high-voltage battery B1 to a first voltage V1, and outputs it to the 48V battery B2. Here, the first voltage V1 is "48V", that is, the DC / DC converter B1A steps down the voltage of the high-voltage battery B1 to a voltage of 48V equivalent to the first voltage V1, and outputs it to the 48V battery B2. The high-voltage battery B1 is also electrically connected to other devices (not shown) and supplies power to these devices (not shown).

[0016] The 48V battery B2 is a battery that stores electric power at a first voltage V1 that is lower than the voltage of the high-voltage battery B1, and is a second power source that can supply electric power at the first voltage V1. As described above, the first voltage V1 is "48V", that is, the 48V battery B2 has a voltage (battery voltage) of about 48V. The 48V battery B2 is electrically connected to the high-voltage battery B1 via a DC / DC converter B1A, and can be charged by electric power supplied from the high-voltage battery B1 via the DC / DC converter B1A. The 48V battery B2 is not limited to the high-voltage battery B1, and may be charged by electric power generated by, for example, a 48V generator (48V alternator) not shown. The 48V battery B2 is electrically connected to each device D via a wire harness WH, and supplies electric power to each device D via the wire harness WH. In this embodiment, the 48V battery B2 serves as a power source that supplies electric power to both the first device D1 and the second device D2 via a wire harness WH.

[0017] The wire harness WH constitutes a power supply system PL that supplies power from a 48V battery B2, which is a power source, to each device D. The wire harness WH of this embodiment has a voltage conversion function that converts the voltage of the power supplied from the 48V battery B2 into a second voltage V2 lower than the first voltage V1 and outputs the second voltage V2, thereby appropriately supplying power to the first device D1 and the second device D2, which have different drive voltages.

[0018] Specifically, the wire harness WH of this embodiment includes a BFT (Battery Fuse Terminal) 10, a power supply line 20, a 48V power distribution box 30, and a voltage converter 40, and a voltage conversion function by the voltage converter 40 is added to the power supply line 20. With this configuration, the wire harness WH of this embodiment can distribute power to a first device D1, which is a 48V driven device, as well as to a second device D2, which is a 12V driven device, and can convert the voltage from the first voltage V1 to the second voltage V2 in the vicinity of the second device D2, thereby achieving efficient wiring.

[0019] The BFT 10 is an electronic component unit directly connected to the 48V battery B2, which is a power source. The BFT 10 typically has a circuit branching function and a circuit protection function. The BFT 10 is electrically connected to the battery post of the 48V battery B2, for example, by being fastened to the positive electrode of the battery post of the 48V battery B2 via a battery terminal.

[0020] The BFT10 includes a branch bus bar that realizes a circuit branching function and a protective device such as a fuse, a fusible link, or a semiconductor relay that realizes a circuit protection function. The branch bus bar configures a circuit branched according to the number of power supply systems PL to be branched by the BFT10. The BFT10 branches the power supplied from the 48V battery B2 at a first voltage V1, i.e., a voltage of 48V, to the multiple power supply systems PL via the branch bus bar. The protective device is provided for each of the multiple power supply systems PL in the BFT10, and protects the power supply system PL by cutting off the power supply system PL when an overcurrent flows through the power supply system PL. Here, the overcurrent is, for example, a current equal to or greater than a preset rated current. The rated current is determined according to the current of the circuit to be protected. That is, when the protective device is configured with a fusible element such as a fuse or a fusible link, the protective device cuts off the overcurrent when a current equal to or greater than a preset rated current flows, thereby protecting the power supply system PL.

[0021] Here, each of the multiple power supply systems PL branched by the BFT 10 supplies a voltage of 48 V corresponding to a first voltage V1. The BFT 10 is electrically connected to the power supply lines 20 constituting each power supply system PL via a connector, a connection terminal, or the like, and outputs the branched power to each power supply line 20. The wire harness WH of this embodiment is provided with a voltage converter 40 that realizes a voltage conversion function in at least one of the multiple power supply systems PL branched by the BFT 10.

[0022] The power supply line 20 is a wiring member that is interposed between a 48V battery B2, which is a power source, and a device D, and supplies power from the 48V battery B2 to the device D. In other words, the power supply line 20 is interposed between the BFT 10 and the device D, and constitutes a power supply system PL that supplies power to the device D. For example, as described above, a plurality of the power supply lines 20 are electrically connected to the BFT 10 via connectors, connection terminals, or the like according to the number of the plurality of power supply systems PL branched off from the BFT 10, and constitute each power supply system PL. The voltage converter 40 is provided at any location on the power supply line 20 that constitutes the power supply system PL. The power supply line 20 is typically constituted by a general electric wire, but may be constituted by a planar circuit body such as an FPC (Flexible Printed Circuits) or an FFC (Flexible Flat Cable).

[0023] The 48V power distribution box 30 is interposed between the BFT 10 and the device D, and distributes power supplied from the 48V battery B2 to the multiple devices D. The 48V power distribution box 30 is provided on the power supply line 20 constituting the power supply system PL, and distributes power output from the 48V battery B2 via the BFT 10 at a voltage of 48V equivalent to the first voltage V1 to the multiple devices D. The 48V power distribution box 30 is configured to include electronic components such as a branching section, a fuse (circuit protector), and a relay, which work together to distribute power to the multiple devices D. The power supply line 20 is branched at the output side of the 48V power distribution box 30 into a number of lines corresponding to the number of devices D to which power is distributed from the 48V power distribution box 30. In the example of FIG. 2, a total of three 48V power distribution boxes 30 are illustrated.

[0024] At least one of the 48V power distribution boxes 30 of this embodiment distributes power supplied from the 48V battery B2 via the BFT 10 at 48V voltage equivalent to the first voltage V1 to a plurality of first devices D1 that are 48V driven devices, and also distributes a portion of the power to the second device D2 that is a 12V driven device. At this time, the power distributed from the 48V power distribution box 30 to the second device D2 side is converted by a voltage converter 40 provided on the power supply line 20 to a second voltage V2 corresponding to the second device D2, here 12V voltage, and supplied to the second device D2.

[0025] As described above, the voltage converter 40 of this embodiment is provided on the power supply line 20 that supplies power from the 48V battery B2 to the device D, and converts and outputs the voltage of the power supplied from the 48V battery B2. Here, the voltage converter 40 is provided on the power supply line 20 that constitutes the power supply system PL that supplies power from the 48V battery B2 to the second device D2, among the power supply lines 20. The voltage converter 40 is typically configured by a DC / DC converter that converts the voltage of DC power.

[0026] More specifically, the voltage converter 40 of this embodiment converts the voltage of the power supplied from the 48V battery B2 at a first voltage V1 from the first voltage V1 to a second voltage V2 lower than the first voltage V1 and outputs the converted voltage. That is, here, the voltage converter 40 converts the voltage of the power from the 48V battery B2 from 48V equivalent to the first voltage V1 to 12V equivalent to the second voltage V2 and outputs the converted voltage. As a result, the wire harness WH of this embodiment is capable of supplying power at the second voltage V2 lower than the first voltage V1, in addition to supplying power at the first voltage V1 equivalent to the battery voltage of the 48V battery B2.

[0027] The voltage converter 40 of the present embodiment is provided on the power supply line 20 connecting between the 48V power distribution box 30 and the second device D2 in order to perform voltage conversion from the first voltage V1 to the second voltage V2 in the vicinity of the second device D2.

[0028] In the following, a number of variations in the manner in which voltage converter 40 is installed relative to power supply line 20 will be described with reference to FIGS. 3, 4, 5, and 6. FIG.

[0029] <Installation mode 1> FIG. 3 shows an example of an installation mode in which the voltage converter 40 is provided in the middle portion 20A of the power supply line 20. The voltage converter 40 illustrated in FIG. 3 is provided in the middle portion 20A located between the terminals on the 48V battery B2 and 48V power distribution box 30 side and the terminal on the second device D2 side in the power supply line 20. Here, the middle portion 20A of the power supply line 20 typically includes a wide portion other than the terminals of the power supply line 20, and includes, for example, not only the center position in the extension direction of the power supply line 20 but also a position closer to one of the terminals from the center position in the extension direction. More specifically, the power supply line 20 illustrated in FIG. 3 includes a plurality of electric wires 20B divided in the extension direction and a relay connector 20C that connects the plurality of electric wires 20B to each other. The voltage converter 40 illustrated in FIG. 3 is built into one of the relay connectors 20C. With this configuration, the voltage converter 40 can be provided in the middle portion 20A of the power supply line 20. The voltage converter 40 converts power supplied at the first voltage V1 through the portion 20b of the multiple electric wires 20B separated in the extension direction on the side of the 48V battery B2 and the 48V power distribution box 30 into a second voltage V2 lower than the first voltage V1, outputs the power to the portion 20a on the side of the second device D2, and supplies the power at the second voltage V2 to the second device D2.

[0030] In this case, the power supply line 20 is typically configured such that, among the multiple electric wires 20B divided in the extension direction, the portion 20a on the second device D2 side relative to the voltage converter 40, which has a relatively low voltage, is relatively thicker, and the portion 20b on the 48V battery B2, 48V power distribution box 30 side relative to the voltage converter 40, which has a relatively high voltage, is relatively thinner.

[0031] <Installation mode 2> FIG. 4 shows an example of an installation mode in which the voltage converter 40 is provided in the middle portion 20A of the power supply line 20, as in the installation mode 1, but the installation structure is different from that of the installation mode 1. That is, the voltage converter 40 illustrated in FIG. 4 is provided in the middle portion 20A located between the terminal on the 48V battery B2 and 48V power distribution box 30 side and the terminal on the second device D2 side in the power supply line 20, as in the installation mode 1. The power supply line 20 illustrated in FIG. 4 includes a trunk line 20D, a branch line 20E branching from the trunk line 20D, and a terminal connector 20F provided at the terminal of the branch line 20E. The terminal connector 20F has an internal circuit formed of a circuit body such as a bus bar inside a housing, and electrically connects specific ones of the multiple branch lines 20E to each other via the internal circuit, and may be called, for example, a joint connector or a junction connector. 4 is built into the terminal connector (joint connector) 20F. With this configuration, the voltage converter 40 can be provided in the middle 20A of the power supply line 20. In this case, the terminal connector 20F with the built-in voltage converter 40 may be fixed to the vehicle by a fixture or the like, or may be bundled and fixed together with the main line 20D and the branch line 20E by a bundling member or the like. The voltage converter 40 converts the power supplied at the first voltage V1 from the 48V battery B2 and the 48V power distribution box 30 side via the main line 20D and a part of the branch line 20E into a second voltage V2 lower than the first voltage V1, outputs the power to the other branch line 20E, and supplies the power at the second voltage V2 to the second device D2 via the main line 20D again.

[0032] In this case, the power supply line 20 is typically configured such that the portion 20a of the main line 20D and the branch line 20E on the second device D2 side relative to the voltage converter 40, which has a relatively low voltage, is relatively thicker, and the portion 20b on the 48V battery B2, 48V power distribution box 30 side relative to the voltage converter 40, which has a relatively high voltage, is relatively thinner.

[0033] <Installation mode 3> FIG. 5 shows an example of an installation mode different from the installation modes 1 and 2 in that the voltage converter 40 is provided at the terminal 20G on the second device D2 side of the power supply line 20. That is, unlike the installation modes 1 and 2, the voltage converter 40 illustrated in FIG. 5 is provided at the terminal 20G located on the second device D2 side of the power supply line 20. More specifically, the power supply line 20 illustrated in FIG. 5 is provided at the terminal 20G on the second device D2 side and includes a device connector 20H that is connected to the connector D2a of the second device D2. The voltage converter 40 illustrated in FIG. 5 is built into the device connector 20H. With this configuration, the voltage converter 40 can be provided at the terminal 20G on the second device D2 side of the power supply line 20. The voltage converter 40 converts the power supplied at a first voltage V1 from the 48V battery B2 and the 48V power distribution box 30 via the power supply line 20 into a second voltage V2 lower than the first voltage V1 and outputs it directly to the second device D2 itself, thereby supplying power at the second voltage V2 to the second device D2.

[0034] In this case, the power supply line 20 can be a supply line corresponding to the 48V voltage corresponding to the first voltage V1 over its entire range, and there is no need to use a supply line corresponding to the 12V voltage corresponding to the second voltage V2. In other words, in this case, the power supply line 20 can use a relatively thin supply line corresponding to a relatively high voltage over its entire range.

[0035] <Installation mode 4> FIG. 6 shows an example of an installation mode in which the power supply line 20 includes a planar circuit body 20I. The planar circuit body 20I shown in FIG. 6 is a circuit body in which a circuit is configured in a planar shape, and has flexibility. As described above, the planar circuit body 20I is configured by, for example, an FPC or an FFC. The voltage converter 40 shown in FIG. 6 is mounted on the planar circuit body 20I. In this case, the voltage converter 40 converts the power supplied at a first voltage V1 from the 48V battery B2 and the 48V power distribution box 30 side through a part of the circuit of the planar circuit body 20I into a second voltage V2 lower than the first voltage V1, outputs the power to another circuit of the planar circuit body 20I, and supplies the power at the second voltage V2 to the second device D2.

[0036] The wire harness WH described above is provided with the voltage converter 40 on the power supply line 20 that supplies power from the 48V battery B2 to the device D, and can supply power to the device D after voltage conversion by the voltage converter 40 on the power supply line 20. With this configuration, the wire harness WH can supply power from the 48V battery B2 to the first device D1, which is a 48V-driven device, as well as power from the 48V battery B2 to the second device D2, which is a 12V-driven device. As a result, the wire harness WH can properly distribute and supply power to the first device D1 and the second device D2, which have different drive voltages. In addition, the wire harness WH can convert the voltage of the second device D2 from the first voltage V1 to the second voltage V2 in the vicinity of the second device D2, thereby realizing efficient wiring.

[0037] As described above, the wire harness WH can properly supply power to various devices D mounted on the vehicle V even in a situation where devices D with different drive voltages are mixed.

[0038] More specifically, the wire harness WH described above converts the power supplied at the first voltage V1 from the 48V battery B2 to a second voltage V2 lower than the first voltage V1 by the voltage converter 40 and outputs the converted power, thereby being able to supply power at 12V equivalent to the second voltage V2 to the second device D2, which is a 12V driven device among the devices D. That is, the wire harness WH can supply power at 48V equivalent to the first voltage V1 to the first device D1, which is a 48V driven device, and can supply power at 12V equivalent to the second voltage V2 lower than the first voltage V1 to the second device D2, which is a 12V driven device, by the voltage converter 40 on the power supply line 20. In this case, since the power supply line 20 is provided with the voltage converter 40 as described above, the voltage conversion from the first voltage V1 to the second voltage V2 can be performed for the second device D2 in the vicinity of the second device D2, and therefore the number of supply lines corresponding to the 12V voltage corresponding to the second voltage V2 can be minimized. That is, the wire harness WH can minimize the number of relatively thick supply lines corresponding to a relatively low voltage. As a result, the wire harness WH can, for example, shorten the supply lines corresponding to the second voltage V2, which tend to have a relatively thick wire diameter and a large weight, to improve the wiring efficiency, and can suppress the weight increase of the wire harness WH as a whole. In addition, the wire harness WH can flexibly respond to a case where the first device D1 and the second device D2 are mixed as the devices D mounted on the vehicle V and the ratio of the first device D1 and the second device D2 varies depending on the vehicle model and year.

[0039] Here, in the wire harness WH described above, for example, the voltage converter 40 can be provided in the middle portion 20A of the power supply line 20. This allows the wire harness WH to have the voltage converter 40 provided on the power supply line 20.

[0040] In this case, the wire harness WH described above may have the voltage converter 40 built in, for example, the relay connector 20C that connects the multiple electric wires 20B to each other in the power supply line 20. This allows the wire harness WH to easily provide the voltage converter 40 in the middle portion 20A of the power supply line 20.

[0041] As another example, the wire harness WH described above may incorporate the voltage converter 40 in, for example, a terminal connector (joint connector) 20F provided at an end of a branch line 20E branching off from the trunk line 20D in the power supply line 20. In this case as well, the wire harness WH can easily provide the voltage converter 40 in the middle portion 20A of the power supply line 20.

[0042] In this case, the wire harness WH described above is configured such that the portion 20a of the power supply line 20 on the second device D2 side from the voltage converter 40 is thicker than the portion 20b on the 48V battery B2 and 48V power distribution box 30 side from the voltage converter 40. In this configuration, the wire harness WH can convert the voltage from the first voltage V1 to the second voltage V2 in the vicinity of the second device D2 as described above. As a result, the wire harness WH can improve the wiring efficiency by shortening the supply line corresponding to the second voltage V2, which tends to have a relatively thick wire diameter and a heavy weight, as much as possible as described above, and can suppress an increase in the weight of the wire harness WH as a whole.

[0043] Meanwhile, the wire harness WH described above may also be provided with the voltage converter 40 at the terminal 20G on the second device D2 side of the power supply line 20. In this case, the wire harness WH may be configured such that the voltage converter 40 is provided on the power supply line 20 and that the supply line corresponding to the second voltage V2, which tends to have a relatively thick wire diameter and be heavy, is not used, which contributes to further weight reduction.

[0044] In this case, the wire harness WH described above may incorporate the voltage converter 40 in, for example, the device connector 20H provided at the terminal 20G on the second device D2 side of the power supply line 20. This allows the wire harness WH to easily provide the voltage converter 40 at the terminal 20G on the second device D2 side of the power supply line 20.

[0045] In addition, in the wire harness WH described above, for example, the voltage converter 40 may be mounted on the flexible planar circuit body 20I as a component. This allows the voltage converter 40 in the wire harness WH to be easily provided on the power supply line 20.

[0046] The wire harness according to the embodiment of the present invention described above is not limited to the above embodiment, and various modifications are possible within the scope of the claims.

[0047] In the above description, the voltage converter 40 has been described as being provided in the power supply line 20 connecting the 48V power distribution box 30 and the second device D2 in order to convert the voltage from the first voltage V1 to the second voltage V2 closer to the second device D2, but this is not limiting. For example, the voltage converter 40 may be provided in a power supply line (not shown) that branches off on the 48V battery B2 side of the 48V power distribution box 30 and leads to the second device D2.

[0048] In the above description, the wire harness WH is described as being provided with one voltage converter 40 for one second device D2, but this is not limited thereto. For example, the wire harness WH may be provided with a 12V power distribution box on the power supply line 20 on the second device D2 side of the voltage converter 40 for distributing power at the second voltage V2 to the multiple second devices D2.

[0049] In the above description, the voltage converter 40 has been described as converting the voltage of the power supplied from the 48V battery B2 to a second voltage V2 lower than the first voltage V1 and outputting it in order to supply power to the second device D2, which is a 12V-driven device, but this is not limiting. For example, the voltage converter may convert the voltage of the power supplied from the 48V battery B2 to a voltage higher than the first voltage V1 in order to supply power to another device D, and output the voltage.

[0050] The wire harness according to the present embodiment may be configured by appropriately combining the components of the embodiment and modified examples described above. [Explanation of symbols]

[0051] 20 Power supply line 20A Midsection 20B electric wire 20C relay connector 20D Main Line 20E Branch Line 20F Terminal Connector 20G terminal 20H Equipment Connector 20I Planar circuit body 20a, 20b part 40 Voltage converter B2 48V battery (power supply) D equipment D1 1st device D2 2nd device PL power system Sys Power System V Vehicle V1 First voltage V2 Second voltage WH Wire harness

Claims

1. a power supply line that supplies power from a power source mounted on a vehicle to a device mounted on the vehicle; a voltage converter provided on the power supply line for converting and outputting a voltage of the power supplied from the power source, Wire harness.

2. the power supply is capable of providing power at a first voltage; The voltage converter converts a voltage of the power supplied from the power source into a second voltage lower than the first voltage and outputs the second voltage. The wire harness according to claim 1 .

3. The voltage converter is provided in a middle portion of the power supply line between the power source terminal and the device terminal. The wire harness according to claim 1 or 2.

4. The voltage converter is provided at a terminal of the power supply line on the device side. The wire harness according to claim 1 or 2.

5. the power supply line includes a plurality of electric wires and a relay connector that connects the plurality of electric wires to each other, The voltage converter is built into the relay connector. The wire harness according to claim 1 or 2.

6. the power supply line includes a trunk line, a branch line branching from the trunk line, and a terminal connector provided at an end of the branch line; The voltage converter is built into the terminal connector. The wire harness according to claim 1 or 2.

7. the power supply line includes an equipment connector provided at a terminal on the equipment side and connected to the equipment, The voltage converter is built into the device connector. The wire harness according to claim 1 or 2.

8. the power supply line includes a flexible planar circuit body; The voltage converter is mounted on the planar circuit body. The wire harness according to claim 1 or 2.

9. the power supply line is thicker at a portion closer to the device than the voltage converter than a portion closer to the power source than the voltage converter; The wire harness according to claim 2.

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