Wire harness

Abstract

The invention provides a wire harness capable of changing the arrangement order of circuit patterns while suppressing an increase in cost. A wire harness is provided with: a flexible printed circuit board (3) having a plurality of circuit patterns (60); the flexible printed circuit board has: a first region (31) that is connected to an object; a second region (32) connected to the connector; and an intermediate region (33), the plurality of circuit patterns having: a first contact portion (61) disposed in the first region; a second contact part (62) disposed in the second region; and a conductive path (63) disposed in the intermediate region, the intermediate region of the flexible printed circuit board being bent at the bent portion (34) such that the direction (D1) of the first extension portion (35) intersects the direction (D2) of the second extension portion (36), and the conductive path (63) being disposed in the direction (RD) of rotation in a plan view of the bent portion. The arrangement order of the plurality of conductive paths in the first extension portion is the same as the arrangement order of the plurality of conductive paths in the second extension portion.

Description

TECHNICAL FIELD

[0001] The present application relates to a wire harness. BACKGROUND

[0002] In the past, there has been a flexible printed board (FPC). In Patent Document 1, a technology is disclosed in which, by two-surfacing the FPC, the branching wiring can be crossed.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENT

[0005] Patent Document 1: Japanese Patent Application Publication No. 2014-099537 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In a wire harness having a flexible printed board and a connector, in order to be compatible with a device that is a connection target of the connector, there are cases in which there is a demand to exchange the arrangement order of the circuit pattern. As a reason for generating such an exchange demand, for example, there can be cited the need to be consistent with the arrangement order of the terminals in the counterpart connector. As a method of exchanging the arrangement order of the circuit pattern, it is considered to multilayer the flexible printed board, but in this case, there is a risk of an increase in manufacturing cost.

[0008] An object of the present application is to provide a wire harness that can exchange the arrangement order of the circuit pattern while suppressing an increase in cost.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] The wire harness of the present application is characterized by a flexible printed board having a plurality of circuit patterns in one conductive layer and arranged in an apparatus, and a connector having a plurality of terminals connected to the plurality of circuit patterns, the flexible printed board having a first region connected to an object, a second region connected to the connector, and an intermediate region extending between the first region and the second region, the plurality of circuit patterns each having a first contact portion provided in the first region, a second contact portion provided in the second region, and a conductive path extending in the intermediate region, the flexible printed board being arranged in a state that a bent portion is formed in the intermediate region and a folded-back portion is formed in the second region, the intermediate region having a first extension portion extending from the bent portion toward the first region and a second extension portion extending from the bent portion toward the second region, and the intermediate region being bent at the bent portion so that a direction of the first extension portion and a direction of the second extension portion cross, in one rotation direction centered on the bent portion when the bent portion is viewed from above, an arrangement order of the plurality of conductive paths in the first extension portion and an arrangement order of the plurality of conductive paths in the second extension portion being the same order, and the folded-back portion being folded back so that the second contact portion faces a side opposite to the apparatus side.

[0011] Effects of the Invention

[0012] In the wire harness of the present application, the flexible printed board is arranged in a state that a bent portion is formed in the intermediate region and a folded-back portion is formed in the second region. In one rotation direction centered on the bent portion when the bent portion is viewed from above, an arrangement order of the plurality of conductive paths in the first extension portion and an arrangement order of the plurality of conductive paths in the second extension portion are the same order. The folded-back portion is folded back so that the second contact portion faces a side opposite to the apparatus side. According to the wire harness of the present application, an effect of being able to suppress an increase in cost and to change an arrangement order of circuit patterns is exerted. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the wire harness and bus bar module of the embodiment.

[0014] Figure 2 is a plan view of the wire harness and bus bar module of the embodiment.

[0015] Figure 3 is a side view of the wire harness and bus bar module of the embodiment.

[0016] Figure 4 is a plan view of the flexible printed board of the embodiment.

[0017] Figure 5 is a cross-sectional view of the flexible printed board of the embodiment.

[0018] Figure 6 is a plan view of the flexible printed board of the embodiment.

[0019] Figure 7 is a perspective view of the flexible printed board of the embodiment.

[0020] Figure 8 is a plan view of the wire harness of the reference example.

[0021] Figure 9 is a plan view of another flexible printed board of the embodiment.

[0022] Figure 10 is a plan view of another flexible printed board of the embodiment.

[0023] Figure 11 is a plan view of other wire harnesses of the embodiment.

[0024] Figure 12 is a plan view of other wire harnesses of the embodiment. DETAILED DESCRIPTION

[0025] Hereinafter, a wire harness of an embodiment of the present application will be described in detail with reference to the drawings. In addition, the present application is not limited to this embodiment. In addition, the constituent elements in the following embodiment include elements that can be easily conceived by those skilled in the art or substantially the same elements.

[0026] [EMBODIMENT]

[0027] Reference Figures 1 to 12 An embodiment will be described. The present embodiment relates to a wire harness. Figure 1 is a perspective view of the wire harness and bus bar module of the embodiment, Figure 2 is a plan view of the wire harness and bus bar module of the embodiment, Figure 3 is a side view of the wire harness and bus bar module of the embodiment, Figure 4 is a plan view of the flexible printed board of the embodiment, Figure 5 is a cross-sectional view of the flexible printed board of the embodiment, Figure 6 is a plan view of the flexible printed board of the embodiment, Figure 7 is a perspective view of the flexible printed board of the embodiment, Figure 8 is a plan view of the wire harness of the reference example, Figure 9 and Figure 10 is a plan view of other flexible printed boards of the embodiment, Figure 11 and Figure 12 is a plan view of other wire harnesses of the embodiment. Figure 5 shows Figure 4V-V cross section.

[0028] As Figures 1 to 3 shown, the wire harness 1 of the embodiment is arranged in a battery module 110 of a battery pack 100, for example. The battery pack 100 is mounted as a power supply in a vehicle such as an electric vehicle or a hybrid electric vehicle, for example. As Figure 2 shown, the battery module 110 has a plurality of battery cells 120 arranged therein. In the present specification, the direction in which the plurality of battery cells 120 are arranged is referred to as an arrangement direction AR. A monitoring device 130 is arranged at an end portion of the arrangement direction AR of the battery module 110.

[0029] The wire harness 1 of the embodiment has a flexible printed board 3 and a connector 4. The wire harness 1 is connected to a plurality of bus bars 10 to constitute a bus bar module 2. The bus bar 10 is an electric conductor formed of a conductive metal plate, and is fixed to an electrode of the battery cell 120. The bus bar 10 connects two adjacent battery cells 120 in series, for example. The wire harness 1 connects the plurality of bus bars 10 to the monitoring device 130 of the battery pack 100. The wire harness 1 can also connect a thermistor arranged in the battery cell 120 to the monitoring device 130. The monitoring device 130 is a device that monitors the state of the battery cell 120 such as voltage, temperature, and the like.

[0030] The flexible printed board 3 is a flat wiring material having flexibility, and is configured to be able to be laid in a bent state. As Figure 5 shown, the flexible printed board 3 of the embodiment has a base film 5, a cover layer 7, and one conductive layer 6. The base film 5 and the cover layer 7 are insulating resin layers having flexibility. The conductive layer 6 is protected by being sandwiched by the base film 5 and the cover layer 7. The conductive layer 6 is a conductive metal foil, for example, and has a plurality of circuit patterns 60.

[0031] As Figure 1 shown, the wire harness 1 of the embodiment is laid in the battery module 110 in a state in which a bending portion 34 and a folding-back portion 37 are formed in the flexible printed board 3. The bending portion 34 is formed to reverse the arrangement order of the circuit patterns 60 between the bus bar 10 and the connector 4. The wire harness 1 of the embodiment is a single-layer conductive layer 6, but a plurality of circuit patterns 60 can be laid in a crisscross manner. The folding-back portion 37 is folded back so that a contact portion connected to a terminal of the connector 4 faces a side opposite to the battery module 110 side.

[0032] Figure 4 A flexible printed board 3 before bending is shown. The flexible printed board 3 has a length direction X and a width direction Y. The length direction X can be the length direction of a first region 31 described later, or can be the arrangement direction of a plurality of first contact portions 61. The width direction Y is orthogonal to the length direction X. In the following description, one side along the length direction X is referred to as a first side XI, and the other side along the length direction X is referred to as a second side X2.

[0033] The flexible printed circuit board 3 in this embodiment has an approximately L-shaped shape. The flexible printed circuit board 3 has a first region 31, a second region 32, and a middle region 33. The first region 31, the second region 32, and the middle region 33 are exemplified to be rectangular in shape.

[0034] The first region 31 includes the end of the first side X1 of the flexible printed circuit board 3. The second region 32 includes the end of the second side X2 of the flexible printed circuit board 3. The second region 32 is wider than the first region 31 and has a portion that protrudes relative to the first region 31 in the width direction Y. The intermediate region 33 is the region between the first region 31 and the second region 32, extending between the first region 31 and the second region 32. Figure 4 The illustrated intermediate region 33 extends from the first region 31 along the length direction X to the second region 32. The width of the intermediate region 33 is equal to the width of the first region 31. That is, the first region 31 and the intermediate region 33 form a rectangular region.

[0035] like Figure 5 As shown, the flexible printed circuit board 3 has a first surface 3a and a second surface 3b. The first surface 3a is, for example, the surface on the side of the cover layer 7. The second surface 3b is, for example, the surface on the side of the base film 5. The first contact portion 61 and the second contact portion 62, described later, are contact portions exposed on the side of the first surface 3a.

[0036] like Figure 4 As shown, the circuit pattern 60 has a first contact portion 61, a second contact portion 62, and a conductive path 63. The first contact portion 61 is a contact portion disposed in the first region 31 and connected to a connection object such as the busbar 10. The connection object may also include a thermistor. The first contact portion 61 is electrically connected to the corresponding connection object. The first region 31 may also have a branch portion extending in the width direction Y. In this case, the first contact portion 61 may also be disposed in the branch portion. In the flexible printed circuit board 3 before the bending portion 34 is formed, a plurality of first contact portions 61 are arranged along the length direction X.

[0037] The second contact portion 62 is a contact portion disposed in the second region 32 and connected to the terminal 41 of the connector 4. For example... Figure 4 As shown, in the flexible printed circuit board 3 before the bending portion 34 is formed, a plurality of second contact portions 62 are arranged along the length direction X. The position of the second contact portions 62 in the width direction Y is, for example, a position that protrudes in the width direction Y relative to the first region 31.

[0038] The conductive paths 63 are arranged in the intermediate region 33 to connect one first contact portion 61 to a corresponding one second contact portion 62. In the flexible printed board 3 before the bending portion 34 is formed, the conductive paths 63 extend in the length direction X in the intermediate region 33. In the intermediate region 33, a plurality of the conductive paths 63 are arranged in the width direction Y.

[0039] The plurality of the conductive paths 63 include a first conductive path 63a and a second conductive path 63b. The first conductive path 63a and the second conductive path 63b are the conductive paths 63 of the plurality of the conductive paths 63 arranged at the end in the width direction Y to connect to the bus bar 10. The first conductive path 63a is located at the end in the first side Yl in the width direction Y of the conductive paths 63 to connect to the bus bar 10. The second conductive path 63b is located at the end in the second side Y2 in the width direction Y of the plurality of the conductive paths 63 to connect to the bus bar 10. The plurality of the conductive paths 63 to connect to the bus bar 10 extend in the region between the first conductive path 63a and the second conductive path 63b.

[0040] In the following description, the circuit pattern 60 having the first conductive path 63a is referred to as a first pattern 60a, and the circuit pattern 60 having the second conductive path 63b is referred to as a second pattern 60b. In the plurality of the first contact portions 61 to connect to the bus bar 10, the first contact portions 61 of the first pattern 60a and the second pattern 60b are arranged at the ends in the length direction X. That is, in the plurality of the first contact portions 61 to connect to the bus bar 10, the first contact portion 61a of the first pattern is located at the end in the first side Xl. In the plurality of the first contact portions 61 to connect to the bus bar 10, the first contact portion 61b of the second pattern 60b is located at the end in the second side X2. The plurality of the circuit patterns 60 can have a circuit pattern 60 to connect to an object other than the bus bar 10. The first contact portion 61 of the circuit pattern 60 can be arranged between the two first contact portions 61a, 61b or can be arranged at the first side Xl or the second side X2 with respect to the two first contact portions 61a, 61b.

[0041] In the plurality of the second contact portions 62 to correspond to the bus bar 10, the second contact portions 62 of the first pattern 60a and the second pattern 60b are arranged at the ends in the length direction X. That is, in the plurality of the second contact portions 62 to correspond to the bus bar 10, the second contact portion 62a of the first pattern 60a is located at the end in the second side X2. In the plurality of the second contact portions 62 to correspond to the bus bar 10, the second contact portion 62b of the second pattern 60b is located at the end in the first side Xl. The plurality of the circuit patterns 60 can have a circuit pattern 60 to connect to an object other than the bus bar 10. The second contact portion 62 of the circuit pattern 60 can be arranged between the two second contact portions 62a, 62b or can be arranged at the first side Xl or the second side X2 with respect to the two second contact portions 62a, 62b.

[0042] like Figure 3 As shown, connector 4 has a housing 40 and a plurality of terminals 41. The housing 40 has a mating portion 40a that engages with the monitoring device 130. The plurality of terminals 41 are held by the housing 40 and arranged in the width direction of the housing 40. The plurality of terminals 41 are connected to corresponding circuit patterns 60. The monitoring device 130 has a counterpart connector 130a corresponding to connector 4. Connector 4 connects the plurality of terminals 41 to corresponding terminals of the counterpart connector 130a by engaging with the counterpart connector 130a.

[0043] Here, the connection of the multiple circuit patterns 60 corresponding to the busbar 10 to which terminal 41 is determined by the structure of the monitoring device 130. For example... Figure 3 As shown, the plurality of terminals 41 have two terminals 411 and 412 connected to the busbar 10 via a circuit pattern 60. The first terminal 411 is located on the upper side of the battery module 110 in the height direction Z relative to the second terminal 412. The plurality of terminals 41 connected to the busbar 10 via the circuit pattern 60 are terminals 41 between the first terminal 411 and the second terminal 412.

[0044] like Figure 3 As shown, the first pattern 60a of the plurality of circuit patterns 60 connected to the busbar 10 is located below the second pattern 60b in the height direction Z. Furthermore, the circuit patterns 60 connected to the busbar 10 are arranged in the region between the first pattern 60a and the second pattern 60b.

[0045] To accommodate the structure of the monitoring device 130, it is sometimes necessary to connect the first pattern 60a to the first terminal 411 and the second pattern 60b to the second terminal 412. In this case, the arrangement order of the circuit patterns 60 in the second region 32 needs to be reversed relative to the arrangement order of the circuit patterns 60 in the first region 31 of the flexible printed circuit board 3. As a method to reverse the arrangement order of the circuit patterns 60, multilayering of the conductive layer 6 of the flexible printed circuit board 3 is considered, but this would lead to an increase in manufacturing costs.

[0046] In the wiring harness 1 of this embodiment, as will be explained below, the arrangement order of the circuit pattern 60 is reversed by forming a bending portion 34 on the flexible printed circuit board 3. Therefore, the arrangement order of the circuit pattern 60 can be reversed at low cost.

[0047] exist Figure 6 The diagram shows a flexible printed circuit board 3 with a bend 34 formed thereon. The bend 34 is formed in the middle region 33 of the flexible printed circuit board 3. That is, the bend 34 is formed in the region between the plurality of first contact portions 61 and the plurality of second contact portions 62.

[0048] The intermediate region 33, to which the bend 34 is formed, has a first extension 35 and a second extension 36. The bend 34 is formed such that the first surface 3a of the first extension 35 faces the first surface 3a of the second extension 36. The first extension 35 extends from the bend 34 toward the first region 31. The second extension 36 extends from the bend 34 toward the second region 32. The first extension 35 extends along a first direction D1, and the second extension 36 extends along a second direction D2. The bend 34 is formed, for example, orthogonal to the first direction D1 and the second direction D2.

[0049] By forming the bend 34, the arrangement order of the circuit pattern 60 when viewed from above the flexible printed circuit board 3 is changed. For example... Figure 6 As shown, the middle region 33 is bent such that the first conductive path 63a crosses the second conductive path 63b. Therefore, the first conductive path 63a intersects the second conductive path 63b in the top view. By forming the bend 34, the arrangement order of the circuit pattern 60 when viewed from above the flexible printed circuit board 3 is reversed.

[0050] Explain the order of arrangement. Figure 6 The diagram shows the center line CL between the first pattern 60a and the second pattern 60b. The arrow on the center line CL indicates the wiring direction from the first region 31 towards the second region 32. When viewing the plurality of conductive paths 63 along the wiring direction, in the first extension 35, the first conductive path 63a is located on the right side relative to the center line CL, and the second conductive path 63b is located on the left side relative to the center line CL. On the other hand, in the second extension 36, the first conductive path 63a is located on the left side relative to the center line CL, and the second conductive path 63b is located on the right side relative to the center line CL.

[0051] In this way, the bend 34 can reverse the arrangement order of the circuit pattern 60 when viewed from above. By reversing the arrangement order of the multiple conductive paths 63, the arrangement order of the second contact portions 62 in the second region 32 becomes the desired arrangement order. Among the multiple second contact portions 62 corresponding to the busbar 10, the second contact portion 62a of the first pattern 60a is located at the end of the second side Y2 in the width direction Y. The second contact portion 62b of the second pattern 60b is located at the end of the first side Y1 in the width direction Y. Thus, the arrangement order of the second contact portions 62 in the second region 32 becomes a sequence that can... Figure 3 The first terminal 411 is connected to the first pattern 60a and the second terminal 412 is connected to the second pattern 60b in an arrangement order.

[0052] Furthermore, taking the rotation direction centered on the bend 34 as a reference, the arrangement order of the circuit patterns 60 is the same before and after the bend 34. Figure 6The diagram shows a rotational direction RD centered on the bend 34. When observing the arrangement order along the rotational direction RD, the arrangement order in the first extension 35 is the same as the arrangement order in the second extension 36. In either of the two extensions 35 and 36, the plurality of conductive paths 63 from the first conductive path 63a to the second conductive path 63b are arranged in the same order along the rotational direction RD.

[0053] like Figure 7 As shown, the second region 32 is folded back so that the second contact portion 62 is folded back towards the side opposite to the battery module 110 side. In the second region 32, a folded-back portion 37 is formed so that the portion of the second contact portion 62 in the second region 32 is folded back towards the side opposite to the battery module 110 side. The fold line of the folded-back portion 37 runs along the direction in which the plurality of second contact portions 62 are arranged. The folded-back portion 37 is formed between the intermediate region 33 and the second contact portion 62. Furthermore, the terminal 41 of the connector 4 can be connected to the second contact portion 62 after the folded-back portion 37 is formed, or it can be connected to the second contact portion 62 before the folded-back portion 37 is formed.

[0054] like Figure 1 and Figure 3 As shown, connector 4 is connected to the second contact portion 62 in a direction opposite to that of circuit pattern 60. That is, the terminal 41 of connector 4 is connected to the second contact portion 62 with the mating portion 40a positioned relative to the second contact portion 62 on the side of the fold-back portion 37. The fold-back portion 37 is formed near the second contact portion 62. Therefore, the mating portion 40a protrudes from the fold-back portion 37 towards a side opposite to that of the second contact portion 62. Thus, when connector 4 is mated with the other connector 130a, the second region 32 is less likely to interfere with the monitoring device 130.

[0055] like Figure 1 and Figure 2 As shown, the wiring harness 1 has a bending portion 34 and a fold-back portion 37, and is assembled to the battery module 110 with the busbar 10 connected to it. The flexible printed circuit board 3 is assembled to the battery module 110 with the first surface 3a of the first region 31 facing the side opposite to the battery module 110. That is, the flexible printed circuit board 3 is arranged on the battery module 110 with the second surface 3b of the first region 31 facing the battery module 110. The flexible printed circuit board 3 is assembled with the first region 31 along the arrangement direction AR. That is, the flexible printed circuit board 3 is assembled to the battery module 110 with a plurality of first contact portions 61 arranged in the arrangement direction AR.

[0056] The flexible printed circuit board 3 is arranged with the second region 32 facing the side of the battery module 110. The middle region 33 is bent along the corner of the battery module 110. The bent portion 34 of the middle region 33 is disposed on the side of the battery module 110.

[0057] The flexible printed circuit board 3 is folded back in the second region 32 such that the second contact portion 62 faces the side opposite to the battery module 110 side. For example... Figure 2 As shown, in the second region 32, a folded-back portion 37 is formed such that the portion of the second contact portion 62 in the second region 32 faces the side opposite to the battery module 110. With this structure, the second region 32 is accommodated between the connector 4 and the battery module 110.

[0058] Alternatively, the busbar module 2 may also have a housing that holds the flexible printed circuit board 3. In this case, the housing can be fixed to the battery module 110. The housing can be fixed to the battery module 110 while holding the busbar 10.

[0059] Busbar 10 is connected to connector 4 via circuit pattern 60. For example... Figure 2 As shown, the arrangement order of the circuit patterns 60 in the first region 31 of the flexible printed circuit board 3 is interchanged with the arrangement order of the circuit patterns 60 in the second region 32. According to the wiring harness 1 of this embodiment, the arrangement order of the circuit patterns 60 can be reversed at low cost.

[0060] Furthermore, the wiring harness 1 can also be laid out in the second region 32 without forming a foldback 37. Figure 8 In the wiring harness 1 of the illustrated reference example, connector 4 is connected to a second region 32 that does not have a fold-back portion 37. In this case, the housing 40 of connector 4 is disposed on the battery module 110 side relative to the second region 32.

[0061] In the flexible printed circuit board 3 before the bending portion 34 is formed, the arrangement direction of the plurality of second contact portions 62 in the second region 32 is not limited to... Figure 4 The length direction X is shown. For example, as shown... Figure 9 As shown, the plurality of second contact portions 62 in the second region 32 may also be arranged in the width direction Y. In this case, among the plurality of second contact portions 62 corresponding to the busbar 10, the second contact portions 62 of the first pattern 60a and the second pattern 60b are disposed at the ends in the width direction Y.

[0062] Among the plurality of second contact portions 62 corresponding to the busbar 10, the second contact portion 62a of the first pattern 60a is located at the end of the first side Y1. Among the plurality of second contact portions 62 corresponding to the busbar 10, the second contact portion 62b of the second pattern 60b is located at the end of the second side Y2.

[0063] exist Figure 10 The text shows that in Figure 9 The flexible printed circuit board 3 is formed with a bent portion 34. Figure 9 and Figure 10 The flexible printed circuit board 3 shown is used, for example, when the connector 4 is fitted with the monitoring device 130 along the height direction Z of the battery module 110. Furthermore, in the second region 32, a folded-back portion 37 is formed such that the second contact portion 62 faces the side opposite to the device such as the battery module 110. The fold line of the folded-back portion 37 is a line along the arrangement direction of the second contact portion 62.

[0064] Figure 11 The diagram shows the connector 4 connected to the flexible printed circuit board 3. Figure 11 In the flexible printed circuit board 3, a folded-back portion 37 is formed in the second region 32 so that the second contact portion 62 faces outward. In other words, the second region 32 is folded back so that the second contact portion 62 faces the side opposite to the battery module 110 side.

[0065] Multiple terminals 41 of connector 4 are connected to second contact portions 62. The second contact portion 62a of the first pattern 60a is connected to the first terminal 411 of connector 4, and the second contact portion 62b of the second pattern 60b is connected to the second terminal 412 of connector 4.

[0066] Furthermore, the bending shape of the bending portion 34 is not limited to a shape in which the first extension 35 and the second extension 36 are orthogonal. For example, the bending portion 34 may also be formed such that the second extension 36 is inclined relative to the width direction Y. For example, the bending angle of the bending portion 34 can be adjusted according to the position of the counterpart connector 130a. By appropriately setting the bending angle of the bending portion 34, the total length of the flexible printed circuit board 3 can be minimized relative to the position of the counterpart connector 130a.

[0067] Furthermore, the direction of extension of the intermediate region 33 can also be appropriately set according to the position of the counterpart connector 130a, etc. Figure 12The diagram shows an intermediate region 33 extending in a direction orthogonal to the first region 31. The intermediate region 33 extends from the end of the second side X2 of the first region 31 toward the second side Y2 in the width direction Y. A bend 34 is formed in the intermediate region 33. A first extension 35 extends in the width direction Y, and a second extension 36 extends in the length direction X. That is, the bend 34 is bent so that the second extension 36 extends in the length direction X. The second extension 36 extends from the bend 34 toward the side opposite to the first region 31. By forming the bend 34, the arrangement order of the circuit patterns 60 in the second region 32 is reversed relative to the arrangement order of the circuit patterns 60 in the first region 31. A fold-back portion 37 is formed in the second region 32 so that the second contact portion 62 faces the side opposite to the device side.

[0068] As described above, the wiring harness 1 of this embodiment includes: a flexible printed circuit board 3 having multiple circuit patterns 60 on a conductive layer 6 and disposed on a device such as a battery module 110; and a connector 4 having multiple terminals 41 connected to the multiple circuit patterns 60. The flexible printed circuit board 3 has a first region 31 connected to an object such as a busbar 10, a second region 32 connected to the connector 4, and an intermediate region 33. The intermediate region 33 extends between the first region 31 and the second region 32.

[0069] Multiple circuit patterns 60 each have a first contact portion 61 disposed in a first region 31, a second contact portion 62 disposed in a second region 32, and a conductive path 63 extending in an intermediate region 33. The flexible printed circuit board 3 is arranged such that a bending portion 34 is formed in the intermediate region 33 and a fold-back portion 37 is formed in the second region 32. The intermediate region 33 is bent to have a first extension portion 35 extending from the bending portion 34 toward the first region 31 and a second extension portion 36 extending from the bending portion 34 toward the second region 32. The intermediate region 33 is bent at the bending portion 34 such that the direction of the first extension portion 35, i.e., the first direction D1, intersects the direction of the second extension portion 36, i.e., the second direction D2.

[0070] In a rotational direction RD centered on the bend 34 when viewed from above, the arrangement order of the plurality of conductive paths 63 in the first extension 35 is the same as the arrangement order of the plurality of conductive paths 63 in the second extension 36. The fold-back portion 37 folds back so that the second contact portion 62 faces the side opposite to the device side. According to the wiring harness 1 of this embodiment, the arrangement order of the plurality of circuit patterns 60 can be interchanged between the first extension 35 and the second extension 36. By forming the bend 34 and interchanged the arrangement order of the circuit patterns 60, costs can be suppressed compared to the case where the arrangement order is interchanged by multiplying the conductive layer 6.

[0071] In the wire harness 1 of this embodiment, in the flexible printed circuit board 3 before the bending portion 34 is formed, a plurality of first contact portions 61 are arranged in the first region 31 along the length direction X of the flexible printed circuit board 3. Therefore, in the structure in which the plurality of first contact portions 61 are connected to a plurality of objects along the length direction X, the arrangement order of the circuit pattern 60 is changed.

[0072] The flexible printed circuit board 3 of this embodiment has a first surface 3a and a second surface 3b opposite to the first surface 3a, and the first contact portion 61 and the second contact portion 62 are exposed on the first surface 3a. The connector 4 is configured to engage with the counterpart connector 130a of a device such as a battery module 110. The flexible printed circuit board 3 has the second surface 3b of the first region 31 facing the device such as the battery module 110, and the portion of the second region 32 where the second contact portion 62 is provided is arranged facing the side opposite to the device side. With this structure, both the first contact portion 61 and the second contact portion 62 can be arranged facing the side opposite to the device side.

[0073] The connector 4 in this embodiment has a mating portion 40a that engages with the counterpart connector 130a of the device. The terminal 41 is connected to the second contact portion 62 such that the mating portion 40a is located on the folded-back side relative to the second contact portion 62. With such a structure, for example, the mating portion 40a can protrude toward the counterpart connector 130a.

[0074] In the flexible printed circuit board 3 before the bending portion 34 is formed, a plurality of second contact portions 62 may also be arranged in the second region 32 along the long side direction X of the flexible printed circuit board 3. In this case, by forming the bending portion 34, the arrangement direction of the second contact portions 62 can be set to the width direction Y.

[0075] The contents disclosed in the above-described embodiments can be appropriately combined and implemented.

[0076] Explanation of reference numerals in the attached figures

[0077] 1: Wiring harness

[0078] 2: Busbar Module

[0079] 3: Flexible printed circuit board; 3a: First side; 3b: Second side

[0080] 4: Connector

[0081] 5: Base film; 6: Conductive layer; 7: Covering layer

[0082] 31: First area; 32: Second area; 33: Middle area

[0083] 34: Bending portion; 35: First extension portion; 36: Second extension portion

[0084] 37: Turnback Section

[0085] 40: Housing; 40a: Fitting part

[0086] 41: Terminal; 411: First terminal; 412: Second terminal

[0087] 60: Circuit pattern; 60a: First pattern; 60b: Second pattern

[0088] 61: First contact section; 62: Second contact section

[0089] 63: Conductive path; 63a: First conductive path; 63b: Second conductive path

[0090] 100: Battery pack; 110: Battery module; 120: Battery cell

[0091] 130: Monitoring device; 130a: Counterparty connector

[0092] D1: First direction; D2: Second direction

[0093] RD: Direction of rotation

[0094] X: Length direction; X1: First side; X2: Second side

[0095] Y: Width direction; Y1: First side; Y2: Second side

[0096] Z: Height direction

Claims

1. A wire harness, characterized in that, have: A flexible printed circuit board having multiple circuit patterns on a conductive layer and disposed in a device; as well as A connector having a plurality of terminals for connection to a plurality of said circuit patterns. The flexible printed circuit board has: a first region, the first region being connected to an object; A second region, which is connected to the connector; And an intermediate region that extends between the first region and the second region. Each of the plurality of circuit patterns has: a first contact portion disposed in the first region; and a second contact portion disposed in the second region; And a conductive path extending in the intermediate region, The flexible printed circuit board is arranged such that a bending portion is formed in the intermediate region and a folded-back portion is formed in the second region. The intermediate region has a first extension extending from the bend toward the first region and a second extension extending from the bend toward the second region, and the intermediate region bends at the bend such that the direction of the first extension intersects the direction of the second extension. In a rotational direction centered on the bend when viewed from above, the arrangement order of the plurality of conductive paths in the first extension is the same as the arrangement order of the plurality of conductive paths in the second extension, and The folded portion is folded back so that the second contact portion faces the side opposite to the device side.

2. The wire harness according to claim 1, characterized in that, In the flexible printed circuit board prior to the formation of the bending portion, a plurality of first contact portions are arranged in the first region along the length direction of the flexible printed circuit board.

3. The wire harness according to claim 1, characterized in that, The flexible printed circuit board has a first surface and a second surface that is the side opposite to the first surface, and the first contact portion and the second contact portion are exposed on the first surface. The connector is configured to engage with a counterpart connector of the device, and The flexible printed circuit board is arranged such that the second surface of the first region is opposite to the device, and the portion of the second region where the second contact portion is provided faces the side opposite to the device side.

4. The wire harness according to claim 1, characterized in that, The connector has a mating portion that engages with a counterpart connector of the device, and The terminal is connected to the second contact portion in such a manner that the fitting portion is located on the folded-back side relative to the second contact portion.

5. The wire harness according to claim 1, characterized in that, In the flexible printed circuit board prior to the formation of the bending portion, a plurality of second contact portions are arranged in the second region along the length direction of the flexible printed circuit board.

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