Wire harness

Abstract

The purpose of the present invention is to provide a wire harness capable of appropriately supplying power to various devices mounted on a vehicle. A wire harness (WH) is provided with: a power supply line (20) for supplying power from a power source (B2) mounted on a vehicle (V) to a device (D) mounted on the vehicle (V); and a voltage converter (40) that is provided on the power supply line (20), converts the voltage of the power supplied from the power source (B2), and outputs the converted voltage. With this configuration, the wire harness (WH) can appropriately supply power to various devices (D) mounted on the vehicle (V).

Description

Technical Field

[0001] The present invention relates to a wiring harness. Background Art

[0002] For example, Patent Document 1 discloses a wiring harness for supplying power to various devices installed in a vehicle. The wiring 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 at the first battery voltage, and steps down 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 at the second battery voltage; a first supply line provided between the power control box and the first device, and used to supply the first battery voltage to the first device; and a second supply line provided between the power control box and the second device, and used to supply the second battery voltage to the second device.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2016-222085 Summary of the invention

[0006] Technical problem that the invention aims to solve

[0007] In addition, the wiring harness also integrates a voltage conversion function in addition to fuses, relays, branches, etc. in the power control box, thereby realizing power supply to each device when devices with different working voltages are mixed. However, there is room for further improvement in aspects such as the configuration of the voltage conversion function.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wire harness capable of appropriately supplying electric power to various devices mounted on a vehicle.

[0009] Technical solutions to the problem

[0010] In order to achieve the above-mentioned purpose, the wiring harness involved in the present invention comprises: a power supply line, which supplies power from a power supply mounted on a vehicle to a device mounted on the vehicle; and a voltage converter, which is arranged on the power supply line and converts and outputs the voltage of the power supplied from the power supply.

[0011] Effects of the Invention

[0012] The wire harness according to the present invention has the effect of being able to appropriately supply electric power to various devices mounted on a vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic block diagram showing a schematic configuration of a power supply system to which a wiring harness according to the embodiment is applied.

[0014] Figure 2 This is a schematic block diagram showing a schematic configuration of a vehicle to which the wire harness according to the embodiment is applied.

[0015] Figure 3 It is a schematic perspective view showing a schematic structure of a voltage converter of the wire harness according to the embodiment.

[0016] Figure 4 It is a schematic perspective view showing a schematic structure of another form of the voltage converter of the wire harness according to the embodiment.

[0017] Figure 5 It is a schematic perspective view showing a schematic structure of another form of the voltage converter of the wire harness according to the embodiment.

[0018] Figure 6 It is a schematic perspective view showing a schematic structure of another form of the voltage converter of the wire harness according to the embodiment.

[0019] Description of Reference Numerals

[0020] 20 Power supply lines

[0021] 20A Mid Abdomen

[0022] 20B wire

[0023] 20C Relay Connector

[0024] 20D Trunk

[0025] 20E branch line

[0026] 20F end connector

[0027] 20G Terminal

[0028] 20H Device Connector

[0029] 20I Planar Circuit

[0030] Section 20a, 20b

[0031] 40 Voltage Converter

[0032] B2 48V battery (power supply)

[0033] D Device

[0034] D1 First Equipment

[0035] D2 Second Device

[0036] PL Power System

[0037] Sys Power System

[0038] V Vehicle

[0039] V1 First voltage

[0040] V2 Second voltage

[0041] WH Harness DETAILED DESCRIPTION

[0042] Hereinafter, the embodiments of the present invention will be described in detail based on the accompanying drawings. In addition, the present invention is not limited to the embodiments. In addition, the constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art, or substantially the same elements.

[0043] [Implementation Method]

[0044] Figure 1 , Figure 2 The wiring harness WH involved in the present embodiment shown 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 device D is a load device that performs various functions in the vehicle V by operating and driving using the power supplied from the power supply system Sys. The device D is, for example, a running system actuator (electric generator, steering device, brake device, etc.), a body system device (lighting equipment, air conditioning equipment, wiper equipment, electric rearview mirror, electric seat, electric door, etc.), a multimedia system device (navigation device, audio, instrument, display, etc.), a detection system device (sensor, camera, radar, etc.), a communication device, an electronic control unit (ECU: Electronic Control Unit), etc.

[0045] In recent years, as the power sources of these devices D in the vehicle V have diversified, there has been an increasing demand for mixing devices D having different driving voltages in the vehicle V. Under such circumstances, in the power supply system Sys, it is required to appropriately supply power to a plurality of devices D having different driving voltages.

[0046] As described above, the wire harness WH of the present embodiment realizes a configuration that can appropriately supply power to various devices D mounted on the vehicle V when devices D having different driving voltages coexist. Hereinafter, each configuration of the wire harness WH and the like will be described in detail with reference to the drawings.

[0047] In addition, in the following description, it is assumed that the device D is configured to include 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 having different driving voltages. The first voltage V1 is, for example, a voltage of 30V to 60V. On the other hand, the second voltage V2 is a voltage lower than the first voltage V1, for example, a voltage greater than 0V and less than 30V. Here, as an example, the first voltage V1 is assumed to be "48V" and the second voltage V2 is assumed to be "12V" for description. That is, here, it is assumed that the first device D1 is a 48V driving device driven by a 48V voltage, and the second device D2 is a 12V driving device driven by a 12V voltage for description. In addition, below, when there is no need to particularly distinguish between the first device D1 and the second device D2, they are sometimes referred to as "device D".

[0048] Specifically, if Figure 1 , Figure 2 As shown, the power supply system Sys includes a high voltage battery B1 and a 48V battery B2 as power supplies, and a wiring harness WH that electrically connects the high voltage battery B1 and the 48V battery B2 to each device D. In addition, in order to facilitate understanding of the drawings, Figure 2 Illustration of the high-voltage battery B1 is omitted.

[0049] 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. Typically, the voltage of the high-voltage battery B1 is higher than that of the 48V battery B2, for example, a voltage of about 300V to 400V (battery voltage). The high-voltage battery B1 of the present 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, and converts the voltage of the electric power from the high-voltage battery B1 into 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 48V voltage equivalent to the first voltage V1 and outputs it to the 48V battery B2. In addition, the high-voltage battery B1 is also electrically connected to a device not shown in the figure, and also supplies electric power to the device not shown in the figure.

[0050] The 48V battery B2 is a battery that stores electric power at a first voltage V1 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, here, the first voltage V1 is "48V", that is, the 48V battery B2 is a voltage of about 48V (battery voltage). The 48V battery B2 is electrically connected to the high-voltage battery B1 via the DC / DC converter B1A, and can be charged by the electric power supplied from the high-voltage battery B1 via the DC / DC converter B1A. In addition, the 48V battery B2 is not limited to being charged by the high-voltage battery B1, and can also be charged by the electric power generated by a 48V generator (48V AC generator) not shown in the figure, etc. The 48V battery B2 is electrically connected to each device D via the wiring harness WH, and supplies electric power to each device D via the wiring harness WH. The 48V battery B2 of this embodiment becomes a power source that supplies electric power to both the first device D1 and the second device D2 via the wiring harness WH.

[0051] The wiring harness WH constitutes a power supply system PL that supplies power from a 48V battery B2 as a power supply to each device D. The wiring 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 that is 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 having different driving voltages.

[0052] Specifically, the wiring harness WH of the present embodiment includes a BFT (Battery Fuse Terminal) 10, a power supply line 20, a 48V power distribution box (power distribution BOX) 30, and a voltage converter 40, and a voltage conversion function of the voltage converter 40 is added to the power supply line 20. With this structure, the wiring harness WH of the present embodiment can realize power distribution to the second device D2 as a 12V drive device in addition to power distribution to the first device D1 as a 48V drive device, and can perform voltage conversion from the first voltage V1 to the second voltage V2 near the second device D2, thereby realizing efficient wiring.

[0053] The BFT 10 is an electronic component unit directly connected to the 48V battery B2 as a power source. The BFT 10 typically has a circuit branching function and a circuit protection function. The BFT 10 is fastened to the anode of the battery post of the 48V battery B2 via a battery terminal, for example, and is electrically connected to the battery post.

[0054] The BFT 10 is configured to include a branch bus bar that realizes a circuit branching function, and a protector such as a fuse, a fuse link, a semiconductor relay, etc. that realizes a circuit protection function. The branch bus bar constitutes a circuit that branches according to the number of power supply systems PL branched in the BFT 10. The BFT 10 branches the power supplied from the 48V battery B2 at a first voltage V1, that is, a 48V voltage, to multiple power supply systems PL via the branch bus bar. In the BFT 10, the protector is respectively provided for multiple power supply systems PL, and is cut off when an overcurrent flows through the power supply system PL to protect the power supply system PL. Here, the overcurrent is, for example, a current above a preset rated value. The rated current is determined separately according to the current of the circuit to be protected. That is, when the protector is composed of a fusible element such as a fuse link, a fuse link, etc., it cuts off the overcurrent by melting when a current above a preset rated value flows, thereby protecting the power supply system PL.

[0055] Here, the plurality of power supply systems PL branched by the BFT 10 all supply a 48V voltage equivalent to the 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, etc., and outputs the branched power to the power supply lines 20. In addition, the wiring harness WH of the present embodiment is provided with a voltage converter 40 that realizes a voltage conversion function in at least one of the plurality of power supply systems PL branched by the BFT 10.

[0056] The power supply line 20 is a wiring component that is interposed between the 48V battery B2 as a power source and the device D and supplies power from the 48V battery B2 to the device D. That is, 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, according to the number of multiple power supply systems PL branched in the BFT 10 as described above, multiple power supply lines 20 are electrically connected to the BFT 10 via connectors, connection terminals, etc., to constitute each power supply system PL. The voltage converter 40 is provided at any position on the power supply line 20 constituting the power supply system PL. The power supply line 20 is typically composed of general electric wires, but can also be composed of a planar circuit body such as FPC (Flexible Printed Circuits) and FFC (Flexible Flat Cable).

[0057] The 48V power distribution box 30 is disposed between the BFT 10 and the devices D, and distributes the 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 the power output from the 48V battery B2 via the BFT 10 at a 48V voltage corresponding to the first voltage V1 to the multiple devices D. The 48V power distribution box 30 is constructed to include electronic components such as branching parts, fuses (circuit protectors), and relays, which cooperate to distribute power to the multiple devices D. The power supply line 20 is branched on the output side of the 48V power distribution box 30 into a number corresponding to the number of devices D to which power is distributed from the 48V power distribution box 30. Figure 2 In the example shown in FIG. 1 , a total of three 48V power distribution boxes 30 are provided.

[0058] Furthermore, at least one of the 48V power distribution boxes 30 of the present embodiment distributes the power supplied from the 48V battery B2 via the BFT 10 at a 48V voltage equivalent to the first voltage V1 to a plurality of first devices D1 as 48V drive devices, and also distributes a portion of the power to the second device D2 side as a 12V drive device. At this time, the power distributed from the 48V power distribution box 30 to the second device D2 side is converted to a second voltage V2 corresponding to the second device D2, here, a 12V voltage, by a voltage converter 40 provided on the power supply line 20, and is supplied to the second device D2.

[0059] As described above, the voltage converter 40 of the present embodiment is provided in the power supply line 20 that supplies the power from the 48V battery B2 to the device D, and converts the voltage of the power supplied from the 48V battery B2 and outputs it. Here, the voltage converter 40 is provided in 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 in the power supply line 20. The voltage converter 40 is typically composed of a DC / DC converter that converts the voltage of DC power.

[0060] More specifically, the voltage converter 40 of the present embodiment converts the voltage of the electric power supplied from the 48V battery B2 at the first voltage V1 from the first voltage V1 to the second voltage V2 lower than the first voltage V1 and outputs it. That is, here, the voltage converter 40 converts the voltage of the electric power from the 48V battery B2 from the 48V voltage equivalent to the first voltage V1 to the 12V voltage equivalent to the second voltage V2 and outputs it. Thus, the wiring harness WH of the present embodiment can supply electric power at the second voltage V2 lower than the first voltage V1 in addition to supplying electric power at the first voltage V1 equivalent to the battery voltage of the 48V battery B2.

[0061] In order to perform voltage conversion from the first voltage V1 to the second voltage V2 at a position closer to the second device D2 , the voltage converter 40 of the present embodiment is provided on the power supply line 20 connecting the 48V power distribution box 30 and the second device D2 .

[0062] Below, refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 , a plurality of variations of the arrangement of the voltage converter 40 with respect to the power supply line 20 are described.

[0063] <Setting method 1>

[0064] Figure 3 An example of an installation form in which the voltage converter 40 is installed in the middle portion 20A of the power supply line 20 is shown. Figure 3 The voltage converter 40 shown in the example is provided in the middle part 20A between the end on the side of the 48V battery B2 and the 48V power distribution box 30 and the end on the side of the second device D2 in the power supply line 20. In addition, here, the middle part 20A of the power supply line 20 typically widely includes the part other than the end of the power supply line 20, for example, not limited to the central position in the extension direction of the power supply line 20, but also includes the position close to any end side from the central position in the extension direction. More specifically, Figure 3 The illustrated power supply line 20 is configured to include a plurality of electric wires 20B divided in the extending direction and a relay connector 20C that connects the plurality of electric wires 20B to each other. Figure 3 The voltage converter 40 shown in the example is built into one of the relay connectors 20C. According to this structure, the voltage converter 40 can be provided in the middle part 20A of the power supply line 20. The voltage converter 40 converts the power supplied at the first voltage V1 through the 48V battery B2 and the part 20b on the 48V power distribution box 30 side of the plurality of wires 20B divided in the extension direction into a second voltage V2 lower than the first voltage V1 and outputs it to the part 20a on the second device D2 side, and supplies power to the second device D2 at the second voltage V2.

[0065] In addition, in this case, the power supply line 20 is typically constructed as follows: among the multiple electric wires 20B divided in the extension direction, the relatively low-voltage portion 20a on the second device D2 side compared to the voltage converter 40 is relatively thick, and the relatively high-voltage portion 20b on the 48V battery B2, 48V power distribution box 30 side compared to the voltage converter 40 is relatively thin.

[0066] <Setting method 2>

[0067] Figure 4The example of the installation mode in which the voltage converter 40 is installed in the middle part 20A of the power supply line 20 is shown similarly to the installation mode 1, but its installation structure is different from the installation mode 1. That is, Figure 4 The voltage converter 40 shown in the example is provided in the middle portion 20A of the power supply line 20 between the end on the 48V battery B2 and 48V power distribution box 30 side and the end on the second device D2 side, similarly to the installation mode 1. Figure 4 The power supply line 20 shown in the example is composed of a trunk line 20D, a branch line 20E branching from the trunk line 20D, and a terminal connector 20F provided at the end of the branch line 20E. The terminal connector 20F has an internal circuit composed of a circuit body such as a bus bar inside a housing, and specific branch lines among the plurality of branch lines 20E are electrically connected to each other via the internal circuit. The terminal connector 20F is sometimes also called a joint connector or a joint connector. In addition, Figure 4 The voltage converter 40 shown in the example is built into the terminal connector (joint connector) 20F. According to this structure, the voltage converter 40 can be set in the middle part 20A of the power supply line 20. In this case, the terminal connector 20F with the built-in voltage converter 40 can be fixed to the vehicle by a fixing member or the like, or can be fixed by being bundled 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 from the 48V battery B2 and the 48V power distribution box 30 side at the first voltage V1 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 it to other branch lines 20E, and supplies power to the second device D2 at the second voltage V2 again via the main line 20D.

[0068] In addition, in this case, the power supply line 20 is typically constructed as follows: a relatively low-voltage portion 20a on the second device D2 side compared to the voltage converter 40 in the main line 20D and the branch line 20E is relatively thick, and a relatively high-voltage portion 20b on the 48V battery B2 and 48V power distribution box 30 side compared to the voltage converter 40 is relatively thin.

[0069] <Setting method 3>

[0070] Figure 5 This shows an example of an installation mode that is different from the installation mode 1 and the installation mode 2 in that the voltage converter 40 is installed at the terminal 20G on the second device D2 side of the power supply line 20. That is, Figure 5 The voltage converter 40 shown in the example is different from the installation mode 1 and the installation mode 2 in that it is installed at the end 20G located on the second device D2 side in the power supply line 20. More specifically, Figure 5The illustrated power supply line 20 is configured to include a device connector 20H, which is provided at a terminal 20G on the second device D2 side and is connected to a connector D2a of the second device D2. Figure 5 The voltage converter 40 shown in the example is built into the device connector 20H. According to this structure, the voltage converter 40 can be provided at the end 20G on the second device D2 side of the power supply line 20. 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 power supply line 20 into a second voltage V2 lower than the first voltage V1 and directly outputs it to the second device D2 itself, thereby supplying power to the second device D2 at the second voltage V2.

[0071] In this case, the power supply line 20 can form a supply line corresponding to the 48V voltage equivalent to the first voltage V1 in the entire area, and there is no need to use a supply line corresponding to the 12V voltage equivalent to the second voltage V2. That is, in this case, the power supply line 20 can use a relatively thin supply line corresponding to a relatively high voltage in the entire area.

[0072] <Setting method 4>

[0073] Figure 6 An example of an installation form when a planar circuit body 20I is included as the power supply line 20 is shown. Figure 6 The planar circuit body 20I shown in the example is a circuit body that forms a circuit in a planar shape and has flexibility. As described above, the planar circuit body 20I is formed of, for example, FPC, FFC, etc. Figure 6 The voltage converter 40 shown in the example is mounted as a component on the planar circuit body 20I. In this case, the voltage converter 40 converts the power supplied from the 48V battery B2 and the 48V power distribution box 30 side at the first voltage V1 through a part of the circuit of the planar circuit body 20I into a second voltage V2 lower than the first voltage V1, and outputs it to other circuits of the planar circuit body 20I, and supplies power to the second device D2 at the second voltage V2.

[0074] The wiring harness WH described above is provided with a voltage converter 40 on the power supply line 20 that supplies power from the 48V battery B2 to the device D, so that the power after voltage conversion by the voltage converter 40 can be supplied to the device D by the power supply line 20. According to this structure, in addition to supplying power from the 48V battery B2 to the first device D1 as a 48V driving device, the wiring harness WH can also realize power supply from the same 48V battery B2 to the second device D2 as a 12V driving device. As a result, the wiring harness WH can appropriately distribute and supply power to the first device D1 and the second device D2 with different driving voltages. On this basis, the wiring harness WH can perform voltage conversion from the first voltage V1 to the second voltage V2 for the second device D2 near the second device D2, thereby realizing efficient wiring.

[0075] As described above, the wire harness WH can appropriately supply electric power to various devices D mounted on the vehicle V even in a situation where devices D having different driving voltages are mixed.

[0076] More specifically, the harness WH described above converts the power supplied from the 48V battery B2 at the first voltage V1 into the second voltage V2 lower than the first voltage V1 through the voltage converter 40 and outputs it, thereby being able to supply power to the second device D2, which is a 12V drive device, among the devices D, at a 12V voltage equivalent to the second voltage V2. That is, here, the harness WH can supply power to the first device D1, which is a 48V drive device, at a 48V voltage equivalent to the first voltage V1, and to the second device D2, which is a 12V drive device, at a 12V voltage equivalent to the second voltage V2 lower than the first voltage V1 through the voltage converter 40 on the power supply line 20. In addition, in this case, as described above, the power supply line 20 can perform voltage conversion from the first voltage V1 to the second voltage V2 near the second device D2 by providing the voltage converter 40 on the power supply line 20, so that the supply line corresponding to the 12V voltage equivalent to the second voltage V2 can be reduced as much as possible. That is, the wire harness WH can minimize the supply wires that are relatively thicker corresponding to the relatively low voltage. As a result, the wire harness WH can, for example, minimize the supply wires corresponding to the second voltage V2, which are relatively thick and tend to be heavy, thereby improving the wiring efficiency and suppressing the increase in the weight of the entire wire harness WH. In addition, for example, as a device D mounted on a vehicle V, even if the first device D1 and the second device D2 are mixed and their ratios vary depending on the vehicle model and age, the wire harness WH can minimize the design changes and respond flexibly.

[0077] Here, in the wire harness WH described above, for example, the voltage converter 40 can be provided at the middle portion 20A of the power supply line 20 . Thus, the wire harness WH can provide the voltage converter 40 on the power supply line 20 .

[0078] In this case, the wire harness WH described above may include a voltage converter 40 in a relay connector 20C that interconnects a plurality of electric wires 20B in the power supply line 20. Thus, the wire harness WH can easily install the voltage converter 40 in the middle portion 20A of the power supply line 20.

[0079] In addition, as another example, the wire harness WH described above may also have a voltage converter 40 built into the terminal connector (joint connector) 20F provided at the terminal of the branch line 20E branched from the trunk line 20D in the power supply line 20. In this case, the wire harness WH can also easily provide the voltage converter 40 at the middle portion 20A of the power supply line 20.

[0080] In this case, the harness WH described above is configured such that the portion 20a closer to the second device D2 than the voltage converter 40 in the power supply line 20 is thicker than the portion 20b closer to the 48V battery B2 and the 48V power distribution box 30 than the voltage converter 40. In such a configuration, as described above, the harness WH can perform voltage conversion from the first voltage V1 to the second voltage V2 in the vicinity of the second device D2 with respect to the second device D2. As a result, as described above, the harness WH can shorten the supply line corresponding to the second voltage V2, which has a relatively thick wire diameter and is prone to increase in weight, as much as possible, improve the wiring efficiency, and suppress the increase in the overall weight of the harness WH.

[0081] On the other hand, the wiring harness WH described above can also be provided with the voltage converter 40, for example, at the end 20G on the second device D2 side of the power supply line 20. In this case, the wiring harness WH can be provided with the voltage converter 40 on the power supply line 20, and can be provided with a structure that does not use the supply line itself corresponding to the second voltage V2, which has a relatively thick wire diameter and is prone to increase in weight, which can contribute to further weight reduction.

[0082] In this case, the wiring harness WH described above may also have a built-in voltage converter 40 in, for example, a device connector 20H provided at a terminal 20G on the second device D2 side in the power supply line 20. Thus, the wiring harness WH can easily provide the voltage converter 40 at the terminal 20G on the second device D2 side of the power supply line 20.

[0083] In addition, the wire harness WH described above may also include, for example, the voltage converter 40 as a component mounted on the flexible planar circuit body 20I. Thus, the wire harness WH can easily install the voltage converter 40 on the power supply line 20.

[0084] In addition, the wire harness according to the embodiment of the present invention described above is not limited to the above embodiment, and various changes can be made within the scope described in the claims.

[0085] In the above description, the voltage converter 40 is provided on the power supply line 20 connecting 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 at a position closer to the second device D2, but the present invention is not limited thereto. For example, the voltage converter 40 may also be provided on the power supply line (not shown) that branches off from the 48V battery B2 side of the 48V power distribution box 30 and reaches the second device D2.

[0086] In the above description, the case where the wiring harness WH is provided with one voltage converter 40 for one second device D2 is described, but the present invention is not limited thereto. The wiring harness WH may also include, for example, a 12V power distribution box on the second device D2 side of the voltage converter 40 in the power supply line 20, and the 12V power distribution box is used to distribute power to a plurality of second devices D2 at the second voltage V2.

[0087] In the above description, the voltage converter 40 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 it in order to supply power to the second device D2 as a 12V driving device, but the present invention is not limited thereto. For example, the voltage converter may convert the voltage of the power supplied from the 48V battery B2 into a voltage higher than the first voltage V1 and output it in order to supply power to another device D.

[0088] The wire harness according to the present embodiment may be configured by appropriately combining the components of the above-described embodiment and modified examples.

Claims

1. A wiring harness, characterized in that: have: a power supply line for supplying power from a power source mounted on a vehicle to a device mounted on the vehicle; and A voltage converter is provided on the power supply line and converts the voltage of the power supplied from the power source and outputs the converted voltage.

2. The wire harness according to claim 1, characterized in that: The power supply is capable of supplying power at a first voltage, The voltage converter converts the voltage of the electric power supplied from the power source into a second voltage lower than the first voltage and outputs the second voltage.

3. The wire harness according to claim 1 or 2, characterized in that: The voltage converter is provided in the power supply line at a middle portion between an end on the power source side and an end on the device side.

4. The wire harness according to claim 1 or 2, characterized in that: The voltage converter is provided at an end of the power supply line on the device side.

5. The wire harness according to claim 1 or 2, characterized in that: 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 in the relay connector.

6. The wire harness according to claim 1 or 2, characterized in that: The power supply line includes a trunk line, a branch line branched from the trunk line, and a terminal connector provided at a terminal of the branch line. The voltage converter is built into the terminal connector.

7. The wire harness according to claim 1 or 2, characterized in that: The power supply line includes a device connector, which is provided at an end of the device side and is connected to the device. The voltage converter is built into the device connector.

8. The wire harness according to claim 1 or 2, characterized in that: The power supply line includes a planar circuit body having flexibility, The voltage converter is mounted as a component on the planar circuit body.

9. The wire harness according to claim 2, characterized in that: The power supply line has a portion closer to the device than the voltage converter, and a thickness greater than a portion closer to the power supply than the voltage converter.

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