Wire harness

Abstract

The present invention provides a wire harness capable of suppressing positional displacement of a flat wiring member inside a housing. A wire harness (1) is provided with a flat wiring member (3) having a through-hole (33), and a housing (4) having a groove-shaped channel (41) for housing the flat wiring member (3), the channel (41) having a support wall (41a) facing one main surface (3a) of the flat wiring member (3) and a protrusion (44) protruding from the support wall (41a), and the flat wiring member (3) having a through-hole (33). The flat wiring member (3) is housed in the channel (41) in a state of being positioned by a protrusion (44) inserted into the through hole (33).

Description

Technical Field

[0001] This invention relates to a wire harness. Background Technology

[0002] Conventionally, there are wire harnesses with flat wiring components. Patent document 1 discloses a busbar module that includes multiple busbars, a flexible plate-shaped circuit body, and a housing that houses the circuit body and the busbars.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2022-173609 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] When flat wiring components are housed in a housing, it is desirable to suppress the positional displacement of the flat wiring components within the housing.

[0008] The purpose of this invention is to provide a wire harness that can suppress the positional displacement of flat wiring components inside the housing.

[0009] Methods for solving problems

[0010] The wire harness of the present invention is characterized by having: a flat wiring component; and a housing having a groove-shaped channel capable of receiving the flat wiring component, the channel having: a support wall opposite to a main surface of the flat wiring component; and a protrusion protruding from the support wall, the flat wiring component having a through hole, the flat wiring component being received in the channel in a state of being positioned by the protrusion inserted into the through hole.

[0011] Invention Effects

[0012] In the wiring harness of the present invention, the channel of the housing has a support wall opposite a main surface of the flat wiring member and a protrusion protruding from the support wall. The flat wiring member has a through hole, and the flat wiring member is received in the channel in a state where it is positioned by the protrusion inserted into the through hole. The wiring harness according to the present invention has the effect of suppressing positional displacement of the flat wiring member inside the housing. Attached Figure Description

[0013] Figure 1 This is a diagram illustrating the wiring harness and battery module of an embodiment.

[0014] Figure 2 This is an exploded perspective view of the wiring harness in the embodiment.

[0015] Figure 3 This is a plan view of the flat wiring component in the embodiment.

[0016] Figure 4 This is a plan view of the housing in the embodiment.

[0017] Figure 5 This is a plan view of the wiring harness in the embodiment.

[0018] Figure 6 This is a cross-sectional view of the wiring harness in an embodiment.

[0019] Explanation of reference numerals in the attached figures

[0020] 1: Wiring harness

[0021] 2: Busbar Module

[0022] 3: Flat wiring components

[0023] 4: Casing

[0024] 5: Connector

[0025] 6: Chip fuse

[0026] 7: Reinforcing plate

[0027] 30: Main line section; 30b: Branch section

[0028] 31: Branch; 32: Connecting part; 33: Through hole; 34: Circuit pattern

[0029] 40: Main Body

[0030] 41: Channel

[0031] 41a: Support wall; 41b: Side wall; 41c: Branch section

[0032] 41m: Main channel; 41s: Branch channel

[0033] 42: Cover; 42m: Main cover; 42s: Support cover

[0034] 43: Retaining part; 44: Protrusion; 45: Hinge part; 46: Restricting part

[0035] 100: Battery pack; 110: Battery module; 110a: Side panel

[0036] 120: Battery unit; 130: Monitoring device

[0037] AR: Arrangement direction; X: Length direction; Y: Width direction; Z: Height direction Detailed Implementation

[0038] Hereinafter, the wiring harness of embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to this embodiment. Furthermore, the constituent elements in the following embodiments include elements readily conceived by those skilled in the art or substantially the same elements.

[0039] [Example]

[0040] Reference Figures 1 to 6 The following describes an embodiment. This embodiment relates to a wire harness. Figure 1 This is a diagram illustrating the wiring harness and battery module of an embodiment. Figure 2 This is an exploded perspective view of the wiring harness in the embodiment. Figure 3 This is a plan view of the flat wiring component in the embodiment. Figure 4 This is a plan view of the housing in the embodiment. Figure 5 This is a plan view of the wiring harness in the embodiment. Figure 6 This is a cross-sectional view of the wiring harness in an embodiment. Figure 6 Show Figure 1 VI-VI section.

[0041] In this embodiment, the wire harness 1 is, for example, as shown in... Figure 1 The battery module 110 is shown to be wired to the battery pack 100. The battery pack 100 is used as a power source in vehicles such as electric vehicles and hybrid electric vehicles. Figure 1 As shown, the battery module 110 has multiple battery cells 120 arranged side by side. In this specification, the direction in which the multiple battery cells 120 are arranged is referred to as the arrangement direction AR. A monitoring device 130 is disposed at the end of the battery module 110 along the arrangement direction AR.

[0042] The wiring harness 1 of this embodiment has a flat wiring component 3 and a housing 4. The wiring harness 1 is connected to a plurality of busbars 10 to form a busbar module 2. The busbar 10 is a conductor formed of a conductive metal plate and is fixed to the electrode of the battery cell 120. The busbar 10 connects two adjacent battery cells 120 in series, for example. The wiring harness 1 connects the plurality of busbars 10 to a monitoring device 130 of the battery pack 100. The wiring harness 1 may also connect a thermistor disposed in the battery cell 120 to the monitoring device 130. The monitoring device 130 is a device for monitoring the voltage, temperature, and other states of the battery cell 120.

[0043] Figure 2The flat wiring component 3 shown is a flexible, flat panel wiring component. The flat wiring component 3 is configured to provide wiring in a bent state. The example flat wiring component 3 is a flexible printed circuit board (FPC). The flat wiring component 3, as a flexible printed circuit board, includes a base film, a capping layer, and a conductive layer. The base film and the capping layer are flexible, insulating resin layers. The conductive layer is protected by being sandwiched between the base film and the capping layer. The conductive layer is, for example, a conductive metal foil having multiple circuit patterns 34.

[0044] like Figure 2 As shown, the flat wiring component 3 has two main surfaces 3a and 3b. The flat wiring component 3 is housed within the housing 4 such that one main surface 3a faces the support wall 41a of the housing 4. The flat wiring component 3 has a trunk section 30 and multiple branches 31. The trunk section 30 is the main body portion having multiple circuit patterns. The trunk section 30 is approximately rectangular in shape when viewed from above. In this specification, the length direction of the trunk section 30 is referred to as "length direction X," and the width direction of the trunk section 30 is referred to as "width direction Y." The width direction Y is orthogonal to the length direction X.

[0045] A connecting portion 32 for connection to connector 5 is provided at the end of the trunk section 30 along the length direction X. Multiple circuit patterns 34 are connected to the terminals of connector 5 at the connecting portion 32. Connector 5 is fitted into monitoring device 130, connecting the multiple circuit patterns 34 to monitoring device 130.

[0046] The flat wiring component 3 is provided with a through hole 33. The through hole 33 extends through the flat wiring component 3 along its thickness direction. As will be explained below, in this embodiment, the wire harness 1 suppresses positional displacement of the flat wiring component 3 by means of a protrusion 44 provided on the housing 4.

[0047] like Figure 2 As shown, the trunk section 30 of the flat wiring component 3 has a branch section 30b, where a branch 31 branches out. The branch 31 extends from the branch section 30b of the trunk section 30 in the width direction Y. The example trunk section 30 has multiple branch sections 30b corresponding to multiple branches 31. The flat wiring component 3 has a through hole 33 disposed in the branch section 30b.

[0048] like Figure 3 As shown, the through hole 33 is disposed at the center of the branch portion 30b of the trunk section 30 in the width direction Y. In this embodiment, the through hole 33 is circular in shape. A plurality of through holes 33 are arranged at equal intervals along the length direction X.

[0049] Branch 31 extends from trunk 30 in the width direction Y. In other words, branch 31 extends laterally from trunk 30. Circuit pattern 34 extends from branch 31 through trunk 30 to connector 32, where it connects to connector 5. Chip fuse 6 is installed at the end of branch 31. Reinforcing plate 7 surrounding chip fuse 6 is disposed at the end of branch 31. Reinforcing plate 7 is formed, for example, from a conductive metal plate. Circuit pattern 34 is connected to reinforcing plate 7 via chip fuse 6. Busbar 10 is electrically connected to reinforcing plate 7. Reinforcing plate 7 may be part of busbar 10.

[0050] like Figure 4 As shown, the housing 4 includes a body 40 having a channel 41 and a cover 42 covering the channel 41. The housing 4 is molded, for example, from an insulating synthetic resin. In this embodiment, the body 40 and the cover 42 are integrally molded. However, the body 40 and the cover 42 may also be separate components.

[0051] The main body 40 of this embodiment has a generally rectangular shape when viewed from above. The main body 40 has a channel 41 and a plurality of retaining portions 43. The channel 41 is a groove-shaped channel that accommodates the flat wiring component 3. The channel 41 has a main channel 41m and a plurality of branch channels 41s. The main channel 41m accommodates the trunk portion 30 of the flat wiring component 3. The main channel 41m extends along the length of the main body 40, from one end of the main body 40 to the other end. The branch channels 41s branch from the main channel 41m and accommodate the branches 31 of the flat wiring component 3.

[0052] The channel 41 has a support wall 41a and a pair of side walls 41b. The support wall 41a is a wall portion that faces and supports a main surface 3a of the flat wiring component 3. The pair of side walls 41b are erected from the support wall 41a and face each other across the support wall 41a. The support wall 41a and the pair of side walls 41b form a receiving space with a rectangular cross-sectional shape.

[0053] The retaining part 43 is the portion that receives and retains the busbar 10. Multiple retaining parts 43 are arranged adjacent to and along the main channel 41m. The retaining part 43 is frame-shaped and has a locking portion for locking the busbar 10. Branch channels 41s extend between adjacent retaining parts 43.

[0054] The main body 40 has a plurality of protrusions 44 protruding from the support wall 41a. The protrusions 44 are disposed at the branching portions 41c of the branching channels 41s in the main channel 41m. In this embodiment, the protrusions 44 are cylindrical or cylindrical in shape. That is, the cross-sectional shape of the protrusions 44 in this embodiment is circular.

[0055] The cover 42 is connected to the main body 40 via a flexible hinge portion 45. The cover 42 has a main cover 42m covering the main channel 41m and a plurality of branch covers 42s covering the branch channels 41s. The main cover 42m is disposed on the side opposite to the holding portion 43 relative to the main channel 41m. The main cover 42m has a generally rectangular shape when viewed from above. The branch covers 42s extend from the main cover 42m in the width direction of the main cover 42m. The branch covers 42s are formed to cover the branch portion 31 and the reinforcing plate 7. A engaging portion 42e that engages with the main body 40 is provided at the end of the branch cover 42s.

[0056] The cover 42 has a plurality of limiting portions 46 corresponding to the protrusion 44. The limiting portions 46 are disposed in the branch portion 42a of the branch cover 42s in the main cover 42m. The limiting portions 46 are configured to prevent the protrusion 44 from disengaging from the through hole 33 of the flat wiring member 3. More specifically, the limiting portions 46 are configured to support the flat wiring member 3 adjacent to the protrusion 44 when the cover 42 is in the closed state covering the channel 41.

[0057] In this embodiment, the limiting part 46 has a cylindrical shape into which the protrusion 44 can be inserted. The shape of the limiting part 46 is, for example, a cylindrical shape. The limiting part 46 is configured to engage with the protrusion 44 when the cover 42 is closed.

[0058] Figure 5 A flat cabling component 3 disposed within a housing 4 is shown. The flat cabling component 3 is housed in channel 41 such that a trunk portion 30 extends in the main channel 41m and a branch portion 31 extends in a branch channel 41s. A protrusion 44 of the housing 4 is inserted into a through-hole 33 of the flat cabling component 3 to position the flat cabling component 3. The protrusion 44 positions the flat cabling component 3 in both the length direction (X) and the width direction (Y). The protrusion 44 passes through the branch portion 30b of the flat cabling component 3 and positions the branch portion 30b. Therefore, the protrusion 44 can limit the positional displacement of the branch portion 31 relative to the branch channel 41s.

[0059] The cover 42 of the housing 4 from Figure 5 The indicated state is closed. The cover 42 rotates while deforming the hinge portion 45, engaging with the main body 40. (As shown) Figure 1 As shown, the wire harness 1 with the cover 42 closed is assembled into the battery module 110. Figure 6 Show Figure 1 VI-VI section.

[0060] In this embodiment, the wiring harness 1 is disposed on the side 110a of the battery module 110. Side 110a is a side extending in the vertical direction Z of the battery module 110. The electrodes of the battery cell 120 are disposed on side 110a. The support wall 41a of the housing 4 faces the side 110a of the battery module 110. The trunk portion 30 of the flat wiring member 3 lays wiring with one main surface 3a facing the side 110a of the battery module 110. Figure 1 As shown, the trunk section 30 extends along the arrangement direction AR inside the housing 4.

[0061] like Figure 6 As shown, the protrusion 44 of the housing 4 is inserted into the through hole 33 of the flat wiring component 3. The protrusion 44 supports the flat wiring component 3 in the vertical direction Z and positions the flat wiring component 3. In this embodiment, the trunk section 30 is located below the branch section 31. In this case, the branch section 31 bears a load due to the gravity acting on the trunk section 30. In addition, when the trunk section 30 moves up and down due to vibrations during vehicle operation, it is easy to apply a load to the branch section 31. In the wiring harness 1 of this embodiment, the protrusion 44 supports the trunk section 30, which can reduce the load on the branch section 31.

[0062] The limiting portion 46 is adjacent to the protrusion 44 when the cover 42 covers the channel 41 in the closed state. The limiting portion 46 is adjacent to and opposite the side of the protrusion 44. For example, in Figure 6 In the cross-section, in the vertical direction Z, the limiting part 46 faces the side of the protrusion 44. That is, the limiting part 46 is configured to overlap with the protrusion 44 when viewed from the side.

[0063] The protrusion 44 is opposite the trunk portion 30 in the depth direction of the channel 41. The protrusion 44 supports the flat wiring component 3 and can prevent the protrusion 44 from dislodging from the through hole 33. The limiting portion 46 can prevent the flat wiring component 3 from floating off the support wall 41a. Therefore, the limiting portion 46 can reduce the load borne by the support portion 31.

[0064] As described above, the wiring harness 1 of this embodiment has a flat wiring component 3 and a housing 4. The housing 4 has a groove-shaped channel 41 for receiving the flat wiring component 3. The channel 41 has a support wall 41a opposite to a main surface 3a of the flat wiring component 3 and a protrusion 44 protruding from the support wall 41a. The flat wiring component 3 has a through hole 33. The flat wiring component 3 is received in the channel 41 in a state where it is positioned by the protrusion 44 inserted into the through hole 33. According to the wiring harness 1 of this embodiment, positional displacement of the flat wiring component 3 in the channel 41 can be suppressed.

[0065] The housing 4 of this embodiment includes: a main body 40 having a channel 41; and a cover 42 covering the channel 41. The cover 42 has a limiting portion 46. The limiting portion 46 is configured to support the flat wiring member 3 adjacent to a protrusion 44 in the closed state where the cover 42 covers the channel 41, and to limit the protrusion 44 from dislodging from the through hole 33. The housing 4 with the limiting portion 46 can more reliably suppress the positional displacement of the flat wiring member 3.

[0066] The limiting portion 46 can also be configured such that a flat wiring member 3 is sandwiched between the limiting portion 46 and the support wall 41a. In this case, the flat wiring member 3 is sandwiched between the end of the limiting portion 46 and the support wall 41a. Such a limiting portion 46 can more reliably suppress the positional displacement of the flat wiring member 3.

[0067] In this embodiment, the limiting part 46 has a cylindrical shape. With the cover 42 covering the closed channel 41, the protrusion 44 is inserted into the limiting part 46. This structure suppresses any misalignment between the protrusion 44 and the limiting part 46. The limiting part 46, which engages with the protrusion 44, more reliably suppresses any positional misalignment of the flat wiring component 3.

[0068] The flat wiring component 3 of this embodiment includes: a trunk section 30 having a flat plate shape; and a plurality of branches 31 extending laterally from the trunk section 30. Through holes 33 penetrate the trunk section 30. By suppressing positional displacement of the trunk section 30, the load borne by the branches 31 is reduced.

[0069] In this embodiment, the housing 4 is assembled to a battery module 110 having multiple battery cells 120. With the housing 4 assembled to the battery module 110, the support wall 41a faces the side surface 110a of the battery module 110 extending in the vertical direction Z. The trunk section 30 has a main surface 3a facing the side surface 110a of the battery module 110, and the trunk section 30 extends in the arrangement direction of the multiple battery cells 120. In this structure, by suppressing positional displacement of the trunk section 30, the load borne by the support 31 is reduced.

[0070] In this embodiment, the through hole 33 is disposed at the branch portion 30b of the branching branch 31 in the trunk section 30. By suppressing the positional displacement of the branch portion 30b, the load borne by the branch 31 can be effectively reduced.

[0071] Furthermore, the number and arrangement of protrusions 44 in channel 41 are not limited to the example number and arrangement. For example, protrusions 44 can also be arranged in all branch portions 30b. For example, protrusions 44 can also be arranged in a location in the main channel 41m that is different from the branch portion 30b. The number and arrangement of through holes 33 in flat wiring component 3 are set according to the number and arrangement of protrusions 44 in housing 4.

[0072] The shape of the limiting part 46 is not limited to a cylindrical shape. The shape of the limiting part 46 can also be a cylindrical shape different from a cylindrical shape. The shape of the limiting part 46 can also be non-cylindrical. The limiting part 46 can also be a plate-shaped or rod-shaped rib.

[0073] The flat wiring component 3 is not limited to a flexible printed circuit board. The flat wiring component 3 can be a flexible flat cable (FFC) or other plate-shaped wiring components.

[0074] The contents disclosed in the above embodiments can be appropriately combined to perform the tasks.

Claims

1. A wire harness, characterized in that, have: Flat wiring components; and The housing has a slot-shaped channel capable of accommodating the flat wiring component. The channel has a support wall that is opposite a main surface of the flat wiring component; and protrusions that project from the support wall, and The flat wiring component has a through hole, and the flat wiring component is received in the channel in a state where it is positioned by the protrusion inserted into the through hole.

2. The wire harness as described in claim 1, characterized in that, The housing has: a body having the channel; and a cover covering the channel. The cover has a limiting portion, and The limiting portion is formed such that, in the closed state where the cover covers the channel, the limiting portion is adjacent to and supports the flat wiring component, and restricts the protrusion from dislodging from the through hole.

3. The wire harness as described in claim 2, characterized in that, The limiting portion is configured to clamp the flat wiring component between the limiting portion and the support wall.

4. The wire harness as described in claim 2, characterized in that, The limiting part has a cylindrical shape, and In the closed state, the protrusion is inserted into the limiting part.

5. The wire harness as described in claim 1, characterized in that, The flat wiring component includes: a trunk section having a flat plate shape; and a plurality of branches extending laterally from the trunk section. The through hole extends through the trunk section.

6. The wire harness as described in claim 5, characterized in that, The housing is assembled into a battery module having multiple battery cells. With the housing assembled onto the battery module, the support wall faces the vertically extending side of the battery module, and The trunk section faces the side of the battery module with the main surface facing it, and the trunk section extends along the arrangement direction of the plurality of battery cells.

7. The wire harness as described in claim 5, characterized in that, The through hole is disposed at the branching point in the main line where the branch is formed.

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