Wiring module

Abstract

To provide a wiring module capable of suppressing damage of a connection part between a circuit board and a wire.SOLUTION: A wiring module 20 is mounted to a plurality of power storage elements. The wiring module 20 comprises a plurality of wires 40, a plurality of circuit boards 21 and a protector 50 holding the plurality of circuit boards 21 and the plurality of wires 40. Each wire 40 is electrically connected with each circuit board 21, and the protector 50 includes a wire storage part 62 extending in a first direction and storing the plurality of wires 40 therein. The wire storage part 62 includes: a peripheral wall 63 disposed so as to enclose the plurality of wires 40; and a first bent rib 54 and a second bent rib 55 extending from the peripheral wall 63 to the inside of the wire storage part 62. The first bent rib 54 is disposed at a position displaced from the second bent rib 55 in the first direction. The first bent rib 54 extends from the peripheral wall 63 to one side in a second direction, which is orthogonal to the first direction, and the second bent rib 55 extends from the peripheral wall 63 to the other side in the second direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a wiring module. [Background technology]

[0002] High-voltage battery packs used in electric vehicles, hybrid vehicles, and the like usually have many batteries stacked and electrically connected in series or parallel by a wiring module. A battery connection module described in JP 2019-23996 A (Patent Document 1 below) is known as such a wiring module. The battery connection module described in Patent Document 1 is configured to include a bus bar and a flexible circuit board connected to the bus bar. The flexible circuit board includes a connector at its end. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-23996 A Summary of the Invention [Problem to be solved by the invention]

[0004] Unlike the above configuration, the wiring module may include a bus bar, a circuit board connected to the bus bar, and an electric wire connected to the circuit board. A connector may be connected to an end of the electric wire. The connection between the circuit board and the electric wire may be performed by, for example, soldering. In such a layout module, the connection between the circuit board and the electric wire may be damaged, for example, when vibration or stress is applied to the electric wire, or when the electric wire is pulled during a connector fitting operation. [Means for solving the problem]

[0005] The wiring module of the present disclosure is a wiring module attached to a plurality of energy storage elements, and includes a plurality of electric wires, a plurality of circuit boards, and a protector that holds the plurality of circuit boards and the plurality of electric wires, wherein each of the electric wires is electrically connected to each of the circuit boards, the protector includes an electric wire accommodating section extending in a first direction and accommodating the plurality of electric wires, the electric wire accommodating section includes a peripheral wall arranged to surround the plurality of electric wires, and a first flex rib and a second flex rib extending from the peripheral wall inwardly of the electric wire accommodating section, the first flex rib is arranged at a position offset in the first direction from the second flex rib, the first flex rib extends from the peripheral wall to one side in a second direction perpendicular to the first direction, and the second flex rib extends from the peripheral wall to the other side in the second direction. Effect of the Invention

[0006] According to the present disclosure, it is possible to provide a wiring module that can suppress damage to the connection portion between the circuit board and the electric wire. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a plan view of the electricity storage module according to the first embodiment, showing a state in which an electric wire receiving section is open. [Diagram 2] FIG. 2 is a plan view of the electricity storage module according to the first embodiment, showing a state in which the electric wire receiving section is closed. [Diagram 3] FIG. 3 is a perspective view of the protector according to the first embodiment. [Figure 4] FIG. 4 is an enlarged plan view of the wiring module according to the first embodiment, showing a state in which the electric wire receiving section is open. [Diagram 5] FIG. 5 is an enlarged plan view of the wiring module according to the first embodiment, showing a state in which the electric wire receiving portion is closed. [Figure 6] FIG. 6 is a cross-sectional view taken along line AA of FIG. [Figure 7]FIG. 7 is an enlarged front view of the protector according to the first embodiment, showing the projected area of ​​the internal space of the electric wire receiving portion. [Figure 8] FIG. 8 is an enlarged plan view of the wiring module according to the second embodiment, showing a state in which the electric wire receiving portion is opened. [Figure 9] FIG. 9 is an enlarged plan view of the wiring module according to the second embodiment, showing a state in which the electric wire receiving portion is closed. [Figure 10] FIG. 10 is a cross-sectional view taken along line BB of FIG. [Figure 11] FIG. 11 is a perspective view of a protector according to the second embodiment. [Figure 12] FIG. 12 is an enlarged front view of the protector according to the second embodiment, showing the projected area of ​​the internal space of the electric wire receiving portion. [Figure 13] FIG. 13 is an enlarged plan view of the wiring module according to the third embodiment, showing a state in which the electric wire receiving portion is opened. [Figure 14] FIG. 14 is an enlarged plan view of the wiring module according to the third embodiment, showing a state in which the electric wire receiving portion is closed. [Figure 15] FIG. 15 is a cross-sectional view taken along line CC of FIG. [Figure 16] FIG. 16 is a perspective view of a protector according to the third embodiment. [Figure 17] FIG. 17 is an enlarged front view of the protector according to the third embodiment, showing the projected area of ​​the internal space of the electric wire receiving portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. [1] A wiring module disclosed herein is a wiring module attached to a plurality of energy storage elements, the wiring module comprising: a plurality of electric wires; a plurality of circuit boards; and a protector that holds the plurality of circuit boards and the plurality of electric wires, wherein each of the electric wires is electrically connected to each of the circuit boards. The protector comprises an electric wire accommodating portion extending in a first direction and accommodating the plurality of electric wires, the electric wire accommodating portion comprising a peripheral wall arranged to surround the plurality of electric wires, and a first flex rib and a second flex rib extending from the peripheral wall toward the inside of the electric wire accommodating portion, the first flex rib being arranged at a position offset in the first direction from the second flex rib, the first flex rib extending from the peripheral wall to one side in a second direction perpendicular to the first direction, and the second flex rib extending from the peripheral wall to the other side in the second direction.

[0009] According to this configuration, the first bending rib and the second bending rib can contact the multiple electric wires from opposite sides in the second direction, so that the multiple electric wires can be held in the electric wire accommodating section in a state where they are bent by the first bending rib and the second bending rib. Therefore, the portions of the multiple electric wires bent by the first bending rib and the second bending rib are less likely to move in the first direction relative to the protector inside the electric wire accommodating section. Therefore, when the multiple electric wires are subjected to vibration or stress, stress can be suppressed from occurring in the connection portion between the electric wires and the circuit board, and damage to the connection portion between the electric wires and the circuit board can be suppressed.

[0010] [2] In the above [1], it is preferable that the wire accommodating portion further includes a pressing rib extending inward from the peripheral wall into the wire accommodating portion, the pressing rib being disposed between the first bending rib and the second bending rib in the first direction, and the multiple electric wires being clamped by the peripheral wall and the pressing rib in a third direction perpendicular to the first direction and intersecting the second direction.

[0011] With this configuration, multiple electric wires can be clamped between the peripheral wall and the pressure rib, making it easier for the electric wire accommodating portion to hold the multiple electric wires more firmly around the first bent rib and the second bent rib.

[0012] [3] In the above item [2], it is preferable that the pressing rib has a recess that is arc-shaped when viewed in the first direction.

[0013] With this configuration, it is easy to increase the contact area between the pressing rib and the multiple electric wires.

[0014] [4] In any one of the above [1] to [3], it is preferable that the first bending rib and the second bending rib each have a recess that is arc-shaped when viewed in the first direction.

[0015] With this configuration, it is easy to increase the contact area between the first bent rib and the second bent rib and the multiple electric wires.

[0016] [5] In any one of [1] to [4] above, it is preferable that the plurality of electric wires are bundled together to form a trunk section, and that a projected area of ​​the internal space of the electric wire accommodating section when viewed in the first direction is set to be smaller than a cross-sectional area of ​​the trunk section.

[0017] With this configuration, the trunk portion is more likely to come into contact with the first bent rib and the second bent rib.

[0018] [6] In any one of [1] to [5] above, it is preferable that the peripheral wall comprises a first wall portion from which the first flex rib extends and a second wall portion from which the second flex rib extends, the second wall portion faces the first wall portion in the second direction, and the distance between the first flex rib and the second flex rib in the first direction is set to be smaller than three times the distance between the first wall portion and the second wall portion in the second direction.

[0019] With this configuration, it is possible to increase the frictional force between each of the first bent rib and the plurality of electric wires and between each of the second bent rib and the plurality of electric wires.

[0020] [7] In any one of [1] to [6] above, it is preferable that the protector comprises a protector body and a lid body that is stacked on the protector body in a direction perpendicular to the first direction, and the wire accommodating portion is composed of the protector body and the lid body.

[0021] According to this configuration, the electric wire receiving portion can be easily configured.

[0022] [Details of the embodiment of the present disclosure] The following describes embodiments of the present disclosure. The present disclosure is not limited to these examples, but is shown by the claims, and is intended to include all modifications within the meaning and scope of the claims. In each drawing, for convenience of explanation, some of the configurations may be exaggerated or simplified. In addition, the dimensional ratios of each part may differ in each drawing. In this specification, "orthogonal" does not only mean strictly orthogonal, but also includes roughly orthogonal within the range in which the action and effect of this embodiment are achieved.

[0023] In addition, "facing" in this specification refers to surfaces or members facing each other, and includes not only cases where they are completely facing each other, but also cases where they are partially facing each other. In addition, "facing" in this specification includes both cases where a member other than the two parts is interposed between the two parts, and cases where nothing is interposed between the two parts.

[0024] <Embodiment 1> A first embodiment of the present disclosure will be described with reference to Figs. 1 to 7. A power storage module 10 including a wiring module 20 of this embodiment is mounted on a vehicle as a power source for driving the vehicle, such as an electric vehicle or a hybrid vehicle. In the following description, the direction indicated by the arrow Z is the upward direction, the direction indicated by the arrow X is the forward direction, and the direction indicated by the arrow Y is the leftward direction. In this embodiment, the front-rear direction is an example of the first direction, the left-right direction is an example of the second direction, and the up-down direction is an example of the third direction. Note that, for multiple identical members, only some of the members may be labeled with reference numerals, and the reference numerals of the other members may be omitted.

[0025] As shown in Figs. 1 and 2, the energy storage module 10 includes a plurality of energy storage elements 11 arranged in a line, and a wiring module 20 attached to the upper surfaces of the plurality of energy storage elements 11. The wiring module 20 is attached to the right side of the plurality of energy storage elements 11. Although not shown, a similar wiring module is also attached to the left side of the plurality of energy storage elements 11. The energy storage element 11 has a flat rectangular parallelepiped shape with an energy storage element housed inside. The energy storage element 11 has two electrode terminals 12 located near the right end and the left end of the upper surface. One of the two electrode terminals 12 is a positive electrode, and the other is a negative electrode.

[0026] (Wiring module 20) As shown in FIG. 1, the wiring module 20 includes a bus bar 30 connected to the electrode terminal 12 of the energy storage element 11, a circuit board 21 connected to the bus bar 30, an electric wire 40 connected to the circuit board 21, and a protector 50 that holds the bus bar 30, the circuit board 21, and the electric wire 40.

[0027] The busbar 30 is made of a metal plate and has a rectangular shape in a plan view. The busbar 30 connects between the electrode terminals 12 adjacent in the stacking direction (front-rear direction) of the multiple energy storage elements 11. Although not shown, the wiring module 20 may also include an output busbar connected to the electrode terminals 12 (total positive or total negative) of the energy storage elements 11 arranged at the ends in the stacking direction. The busbar 30 and the electrode terminals 12 are connected by welding or the like. The busbar 30 is accommodated in a busbar accommodating portion 51 of a protector 50 described below.

[0028] (Circuit board 21) In this embodiment, the circuit board 21 is a flexible board, and is configured by forming a conductive path on the surface of a flexible insulating sheet by a printed wiring technology. As shown in FIG. 4, the circuit board 21 includes a board body 22 and an extension portion 23 extending from the board body 22. The board body 22 is substantially rectangular in a plan view. The board body 22 is provided with an insertion hole 22B, and a protrusion 53B, which will be described later, is inserted into the insertion hole 22B. The board body 22 is provided with an electric wire land 22A disposed at one end of the conductive path. The electric wire land 22A is connected to an electric wire 40 by soldering or the like.

[0029] The extension portion 23 is in the form of a wire spring and is configured to be expandable and contractible. The provision of the extension portion 23 allows the end portion (tip portion) of the extension portion 23 opposite the substrate main body 22 to be displaced a predetermined dimension relative to the substrate main body 22. The tip portion of the extension portion 23 is provided with a connection land 23A that is disposed at the other end of the conductive path. The connection land 23A is electrically connected to the bus bar 30 via the metal piece 15.

[0030] Although not shown, a fuse or the like may be provided in the conductive path of circuit board 21. Circuit board 21 also has a plurality of conductive paths, and the conductive paths may include a part of a thermistor circuit for measuring the temperature of energy storage element 11.

[0031] (Electric wire 40, main line 41) The electric wires 40 connected to the circuit board 21 are collectively accommodated in an electric wire accommodating section 62 of the protector 50, which will be described later. The electric wires 40 are arranged in the electric wire accommodating section 62, extending in the front-rear direction. The electric wires 40 may include, in addition to a voltage detection wire electrically connected to the bus bar 30, a temperature detection wire connected to a thermistor that measures the temperature of the energy storage element 11, for example. The electric wires 40 are bundled together to form a trunk section 41. In detail, the trunk section 41 is formed by integrating the electric wires 40 with tape, a heat shrink tube, or the like. The trunk section 41 has a substantially cylindrical shape. The trunk section 41 has a predetermined rigidity and is bendable.

[0032] The electric wires 40 are connected to a connector 42 at an end opposite to the circuit board 21. The connector 42 is adapted to be connected to an external ECU (Electronic Control Unit) or the like. The ECU is equipped with a microcomputer, elements, etc., and has a well-known configuration including functions for detecting the voltage, current, temperature, etc. of each storage element 11 and controlling the charging and discharging of each storage element 11.

[0033] (Protector 50) The protector 50 is made of insulating synthetic resin. As shown in Figs. 3 to 5, the protector 50 includes a protector body 50A and a lid 50B that covers the protector body 50A from above. The lid 50B is integrally formed with the protector body 50A via a hinge portion 50C. The hinge portion 50C is configured to be elastically deformable. As shown in Fig. 5, the lid 50B can be assembled by overlapping it on the upper side of the protector body 50A by elastically deforming the hinge portion 50C.

[0034] (Protector body 50A) 3, protector body 50A has a tray shape. Protector body 50A includes busbar accommodating portion 51 for accommodating busbar 30, accommodating recess 52 for accommodating multiple electric wires 40, and intermediate wiring portion 53 disposed between busbar accommodating portion 51 and accommodating recess 52. Busbar accommodating portion 51 has a frame shape and is disposed side by side in the front-rear direction.

[0035] As shown in Fig. 4, the circuit board 21 and the electric wire 40 connected to the circuit board 21 are arranged in the intermediate wiring portion 53. As shown in Fig. 3, the intermediate wiring portion 53 has a mounting surface 53A on which the circuit board 21 is mounted, a columnar protrusion 53B protruding upward from the mounting surface 53A, and a protrusion receiving portion 53C recessed downward from the mounting surface 53A. The protrusion 53B is inserted into the insertion hole 22B of the circuit board 21. As a result, the board main body 22 is positioned in the intermediate wiring portion 53.

[0036] A partition wall 53D rising upward from the placement surface 53A is provided in the intermediate wiring portion 53. The partition wall 53D can determine the position of the electric wire 40. The partition wall 53D is preferably disposed around the projection receiving portion 53C.

[0037] The intermediate wiring portion 53 has a lock receiving portion 53E that is engaged with a lock portion 58 of the lid body 50B, which will be described later. The lock receiving portion 53E is disposed at a position in the intermediate wiring portion 53 closer to the bus bar accommodating portion 51.

[0038] The accommodating recess 52 is groove-shaped and extends in the front-rear direction. The accommodating recess 52 constitutes an electric wire accommodating section 62 together with the lid 50B, as described below. The accommodating recess 52 includes a bottom wall 52A, a first side wall 52B rising upward from the left edge of the bottom wall 52A, and a second side wall 52C rising upward from the right edge of the bottom wall 52A. The first side wall 52B is connected to the lid 50B via a hinge portion 50C. The second side wall 52C has a notch portion (not shown). The electric wire 40 is received from the intermediate wiring portion 53 into the accommodating recess 52 through the notch portion.

[0039] (First bending rib 54, second bending rib 55) The accommodating recess 52 includes a first bent rib 54 extending rightward from a first side wall 52B (an example of a first wall portion) and a second bent rib 55 extending leftward from a second side wall 52C (an example of a second wall portion). The first bent rib 54 and the second bent rib 55 extend inwardly of the accommodating recess 52 (wire accommodating portion 62) in the left-right direction. The lower end of the first bent rib 54 and the lower end of the second bent rib 55 are connected to the bottom wall 52A. The first bent rib 54 is located forward of the second bent rib 55.

[0040] The first bending rib 54 and the second bending rib 55 are disposed near an end portion (here, a front end portion of the electric wire accommodating portion 62) of the electric wire accommodating portion 62 from which the plurality of electric wires 40 are led out. An excess length portion arrangement portion 56 is provided at a position forward of the end portion of the electric wire accommodating portion 62 in the protector body 50A. The excess length portion arrangement portion 56 is configured to allow the connector 42 and the excess portions of the electric wires 40 arranged between the trunk portion 41 and the connector 42 to be arranged therein.

[0041] 4, when the trunk portion 41 is accommodated in the accommodating recess 52, the first bending rib 54 contacts the trunk portion 41 from the left side, and the second bending rib 55 contacts the trunk portion 41 from the right side. This causes the trunk portion 41 to be bent in a substantially S-shape in plan view. Therefore, the plurality of electric wires 40 can be firmly held in the accommodating recess 52.

[0042] Since the wiring module 20 of the present embodiment is used in a vehicle, it is considered that vibrations are applied to the electric wires 40. In addition, the electric wires 40 are connected to the connector 42, and it is assumed that tensile stress is applied to the electric wires 40 when the connector 42 is connected to an external ECU or the like. As described above, in the present embodiment, the trunk portion 41 is bent by the first bending rib 54 and the second bending rib 55 in the electric wire accommodating portion 62. Therefore, even if vibrations or tensile stresses are applied to the electric wires 40, the vibrations or tensile stresses are unlikely to be transmitted to the connection portion between the electric wires 40 and the circuit board 21. Therefore, damage to the connection portion between the electric wires 40 and the circuit board 21 can be suppressed.

[0043] It is preferable that the distance D1 between the first bent rib 54 and the second bent rib 55 in the front-rear direction is set to be somewhat small. For example, it is preferable that the distance D1 between the first bent rib 54 and the second bent rib 55 in the front-rear direction is set to be smaller than three times the distance D2 between the first side wall 52B and the second side wall 52C in the left-right direction. In addition, the distance D1 between the first bent rib 54 and the second bent rib 55 in the front-rear direction may be set to be smaller than three times the diameter D3 of the trunk portion 41. According to such a dimension setting, the trunk portion 41 is bent into an approximately S-shape in a narrow range in the front-rear direction, so that the restoring force of the trunk portion 41 to return from the bent state can be increased. As a result, the trunk portion 41 is strongly contacted with the first bent rib 54 and the second bent rib 55, and the friction between the trunk portion 41 and the first bent rib 54 and the second bent rib 55 can be increased.

[0044] A distance D4 (see FIG. 7) between the first bending rib 54 and the second bending rib 55 in the left-right direction is preferably set to be smaller than a diameter D3 (see FIG. 4) of the trunk portion 41. With such a dimension setting, the trunk portion 41 can be bent significantly by the first bending rib 54 and the second bending rib 55. This makes it easier to hold the trunk portion 41 more firmly in the electric wire accommodating portion 62.

[0045] (Lid body 50B) As shown in Figs. 3 to 5, the cover 50B is configured to be able to close the housing recess 52 and the intermediate wiring portion 53 of the protector body 50A from above. That is, the cover 50B may be stacked on the protector body 50A in a direction perpendicular to the first direction. For example, the cover 50B is stacked on the protector body 50A in a direction perpendicular to the first direction and intersects with the second direction. As shown in Fig. 3, the cover 50B includes a plate-shaped portion 57, and a lock portion 58, a protruding portion 59, a convex portion 60, and a pressing rib 61 protruding from the plate-shaped portion 57. The lock portion 58 is engaged with the lock receiving portion 53E, so that the cover 50B can maintain a state in which the cover 50B closes the protector body 50A.

[0046] The protrusion 59 is, for example, block-shaped. When the cover 50B closes the protector body 50A, the protrusion 59 is arranged to face the protrusion receiving portion 53C in the vertical direction, and the electric wire 40 is arranged between the protrusion 59 and the protrusion receiving portion 53C. The distance between the protrusion 59 and the protrusion receiving portion 53C is approximately the same as the diameter of the electric wire 40. This makes it easier for friction to occur between the electric wire 40 and the protrusion 59 or the protrusion receiving portion 53C when vibration or stress is applied to the electric wire 40. Therefore, vibration or stress is less likely to be transmitted to the connection portion between the electric wire 40 and the circuit board 21, and damage to the connection portion between the electric wire 40 and the circuit board 21 can be suppressed.

[0047] The protrusion 60 is, for example, block-shaped. When the cover 50B closes the protector body 50A, the protrusion 60 is disposed facing the mounting surface 53A, and the electric wire 40 is disposed between the protrusion 60 and the mounting surface 53A. The distance between the protrusion 60 and the mounting surface 53A is approximately the same as the diameter of the electric wire 40. This makes it easier for friction to occur between the electric wire 40 and the protrusion 60 or the mounting surface 53A when vibration or stress is applied to the electric wire 40. This makes it difficult for vibration or stress to be transmitted to the connection between the electric wire 40 and the circuit board 21, and thus makes it possible to suppress damage to the connection between the electric wire 40 and the circuit board 21.

[0048] (Pressing rib 61, electric wire housing portion 62, peripheral wall 63) A portion of the plate-shaped portion 57 near the hinge portion 50C serves as a ceiling wall 57A that closes the storage recess 52. The cover 50B has a pressing rib 61 that extends from the ceiling wall 57A toward the inside of the storage recess 52 when the cover 50B closes the protector body 50A (see FIG. 6). The pressing rib 61 is disposed between the first bent rib 54 and the second bent rib 55 in the front-rear direction. The electric wire storage portion 62 of this embodiment is constituted by the storage recess 52 of the protector body 50A and the ceiling wall 57A and pressing rib 61 of the cover 50B. A peripheral wall 63 that is disposed to surround the trunk portion 41 in the electric wire storage portion 62 is constituted by the bottom wall 52A, the first side wall 52B, the second side wall 52C, and the ceiling wall 57A.

[0049] 6, when the cover 50B closes the protector body 50A, the pressing rib 61 and the bottom wall 52A are configured to sandwich the trunk portion 41 in the vertical direction. The pressing rib 61 can hold the trunk portion 41 more firmly in the electric wire accommodating portion 62, so that even if vibration or stress is applied to the multiple electric wires 40, the transmission of vibration or stress to the connection portion between the electric wires 40 and the circuit board 21 can be suppressed. Therefore, damage to the connection portion between the electric wires 40 and the circuit board 21 can be suppressed.

[0050] (Recess 61A) The pressing rib 61 has a recess 61A recessed from the protruding end toward the ceiling wall 57A. The recess 61A is formed in an arc shape when viewed from the front-rear direction. By forming the recess 61A in the pressing rib 61, the contact area between the main wire portion 41 and the pressing rib 61 can be increased. This makes it possible to hold the main wire portion 41 more firmly in the electric wire accommodating portion 62. In addition, the recess 61A allows the main wire portion 41 to be positioned in the left-right direction.

[0051] (Projected area 64) As shown in FIG. 7, when the electric wire accommodating portion 62 is viewed from the front-rear direction, the internal space of the electric wire accommodating portion 62 includes a continuous space (hatched portion in FIG. 7) extending in the front-rear direction without being interrupted by the first bent rib 54, the second bent rib 55, and the pressing rib 61. The area of ​​this continuous space when viewed from the front-rear direction is defined as a projected area 64 when the internal space of the electric wire accommodating portion 62 is viewed from the front-rear direction, and will be simply referred to as the projected area 64 hereinafter. In this embodiment, the projected area 64 is set smaller than the cross-sectional area 41A of the trunk portion 41 (see FIG. 6). For example, the projected area 64 may be 70% or less of the cross-sectional area 41A of the trunk portion 41. According to this configuration, the continuous space is reduced, so that the trunk portion 41 is more likely to come into contact with the first bent rib 54, the second bent rib 55, and the pressing rib 61. Therefore, the trunk portion 41 can be held in the electric wire accommodating portion 62 more firmly.

[0052] (Effects of the First Embodiment) (1-1) The wiring module 20 according to the first embodiment is a wiring module 20 attached to a plurality of energy storage elements 11, and includes a plurality of electric wires 40, a plurality of circuit boards 21, and a protector 50 that holds the plurality of circuit boards 21 and the plurality of electric wires 40. Each electric wire 40 is electrically connected to each circuit board 21. The protector 50 includes an electric wire accommodating portion 62 that extends in a first direction (front-rear direction) and accommodates the plurality of electric wires 40. 2 comprises a peripheral wall 63 arranged to surround a plurality of electric wires 40, and a first bending rib 54 and a second bending rib 55 extending from the peripheral wall 63 inwardly into the electric wire accommodating section 62, the first bending rib 54 being arranged at a position offset in the first direction from the second bending rib 55, the first bending rib 54 extending from the peripheral wall 63 to one side in a second direction (left-right direction) perpendicular to the first direction, and the second bending rib 55 extending from the peripheral wall 63 to the other side in the second direction.

[0053] According to this configuration, the first bending rib 54 and the second bending rib 55 can contact the multiple electric wires 40 from opposite sides in the second direction, so that the multiple electric wires 40 can be held in the electric wire accommodating portion 62 in a state where they are bent by the first bending rib 54 and the second bending rib 55. Therefore, the portions of the multiple electric wires 40 bent by the first bending rib 54 and the second bending rib 55 are less likely to move in the first direction relative to the protector 50 inside the electric wire accommodating portion 62. Therefore, when the multiple electric wires 40 are subjected to vibration or stress, stress can be suppressed from occurring in the connection portion between the electric wires 40 and the circuit board 21, so that damage to the connection portion between the electric wires 40 and the circuit board 21 can be suppressed.

[0054] (1-2) In embodiment 1, the wire accommodating portion 62 further includes a pressing rib 61 extending inward from the peripheral wall 63 into the wire accommodating portion 62. The pressing rib 61 is disposed between the first bending rib 54 and the second bending rib 55 in the first direction. The multiple electric wires 40 are clamped by the peripheral wall 63 and the pressing rib 61 in a third direction (up-down direction) that is perpendicular to the first direction and intersects the second direction.

[0055] With this configuration, multiple electric wires 40 can be clamped between the peripheral wall 63 and the pressure rib 61, making it easier for the multiple electric wires 40 to be held more firmly by the electric wire accommodating portion 62 around the first bending rib 54 and the second bending rib 55.

[0056] (1-3) In the first embodiment, the pressing rib 61 has a recess 61A that is arc-shaped when viewed in the first direction.

[0057] This configuration makes it easier to increase the contact area between the pressing rib 61 and the multiple electric wires 40. Therefore, the frictional force between the pressing rib 61 and the electric wires 40 can be increased, and therefore the movement of the electric wires 40 in the first direction relative to the electric wire accommodating portion 62 in the vicinity of the pressing rib 61 can be further suppressed.

[0058] (1-4) In embodiment 1, multiple electric wires 40 are bundled together to form the trunk portion 41, and the projection area 64 of the internal space of the electric wire accommodating portion 62 when viewed in the first direction is set to be smaller than the cross-sectional area 41A of the trunk portion 41.

[0059] With this configuration, the trunk portion 41 is more likely to come into contact with the first bending rib 54 and the second bending rib 55. Therefore, the portions of the multiple electric wires 40 bent by the first bending rib 54 and the second bending rib 55 are more unlikely to move in the first direction relative to the protector 50 inside the electric wire accommodating portion 62. Therefore, damage to the connection portions between the electric wires 40 and the circuit board 21 can be more effectively suppressed.

[0060] (1-5) In embodiment 1, the peripheral wall 63 has a first wall portion (first side wall 52B) from which the first flex rib 54 extends and a second wall portion (second side wall 52C) from which the second flex rib 55 extends, the second wall portion facing the first wall portion in the second direction, and the distance D1 between the first flex rib 54 and the second flex rib 55 in the first direction is set to be smaller than three times the distance D2 between the first wall portion and the second wall portion in the second direction.

[0061] This configuration can increase the frictional force between each of the first bending rib 54 and the second bending rib 55 and the plurality of electric wires 40. Therefore, the portions of the plurality of electric wires 40 bent by the first bending rib 54 and the second bending rib 55 become even more difficult to move in the first direction relative to the protector 50, so that damage to the connection portions between the electric wires 40 and the circuit board 21 can be even more suppressed.

[0062] (1-6) In embodiment 1, the protector 50 includes a protector body 50A and a lid body 50B that is stacked on the protector body 50A in a direction perpendicular to the first direction, and the wire accommodating section 62 is composed of the protector body 50A and the lid body 50B.

[0063] According to this configuration, the electric wire receiving portion 62 can be easily configured.

[0064] <Embodiment 2> A second embodiment of the present disclosure will be described with reference to Figs. 8 to 12. A wiring module 120 according to the second embodiment is configured substantially similarly to the first embodiment, except for the configurations of a first bending rib 154 and a second bending rib 155. In the second embodiment, the front-rear direction is an example of a first direction, and the up-down direction is an example of a second direction. Hereinafter, the same members as those in the first embodiment are given the same reference numerals, and detailed description of the same configurations, functions, and effects as those in the first embodiment will be omitted.

[0065] 8 and 9, the wiring module 120 of this embodiment includes a protector 150, which includes a protector body 150A and a cover body 150B. The protector 150 includes an electric wire accommodating portion 162 that accommodates a plurality of electric wires 40. As shown in Fig. 11, the electric wire accommodating portion 162 is configured by the accommodating recess 152 of the protector body 150A and the ceiling wall 57A and second bent rib 155 of the cover body 150B.

[0066] (First bending rib 154) The accommodating recess 152 has two first bent ribs 154 extending upward from the bottom wall 52A. A left end of the first bent rib 154 is connected to the first side wall 52B, and a right end of the first bent rib 154 is connected to the second side wall 52C. The two first bent ribs 154 are spaced apart in the front-rear direction.

[0067] (Recess 154A) The first bent rib 154 has a recess 154A recessed from the protruding end toward the bottom wall 52A. The recess 154A is formed in an arc shape when viewed from the front-rear direction. By forming the recess 154A in the first bent rib 154, the contact area between the main wire portion 41 and the first bent rib 154 can be increased. This makes it possible to hold the main wire portion 41 more firmly in the electric wire accommodating portion 162. In addition, the recess 154A can position the main wire portion 41 in the left-right direction.

[0068] (Second bending rib 155) The cover 150B has a second bent rib 155 extending from the ceiling wall 57A. When the cover 150B closes the protector body 150A, the second bent rib 155 extends toward the bottom wall 52A (downward). The second bent rib 155 is disposed between the two first bent ribs 154 in the front-rear direction.

[0069] (Recess 155A) The second bent rib 155 has a recess 155A recessed from the protruding end toward the ceiling wall 57A. The recess 155A is formed in an arc shape when viewed from the front-rear direction. By forming the recess 155A in the second bent rib 155, the contact area between the main wire portion 41 and the second bent rib 155 can be increased. This makes it possible to hold the main wire portion 41 more firmly in the electric wire accommodating portion 162. In addition, the recess 155A allows the main wire portion 41 to be positioned in the left-right direction.

[0070] 10, when the trunk portion 41 is accommodated in the electric wire accommodating portion 162, the first bent rib 154 contacts the trunk portion 41 from below, and the second bent rib 155 contacts the trunk portion 41 from above. This causes the trunk portion 41 to be bent in a substantially S-shape when viewed from the left-right direction. Therefore, the multiple electric wires 40 can be firmly held in the electric wire accommodating portion 162.

[0071] (Projected area 164) As shown in FIG. 12, when the electric wire accommodating section 162 is viewed from the front-rear direction, the internal space of the electric wire accommodating section 162 includes a continuous space extending in the front-rear direction without being blocked by the first bent rib 154 and the second bent rib 155. Of this continuous space, the space (hatched area in the figure) that is elliptical when viewed from the front and that is arranged inside the recesses 154A and 155A is an entry space into which the trunk portion 41 can enter. The area of ​​this entry space when viewed from the front-rear direction is defined as a projected area 164. In this embodiment, the projected area 164 is set to be smaller than the cross-sectional area 41A of the trunk portion 41. According to this configuration, the entry space is reduced, and the trunk portion 41 is more likely to come into contact with the first bent rib 154 and the second bent rib 155. Therefore, the trunk portion 41 can be held in the electric wire accommodating section 162 more firmly.

[0072] (Effects of the second embodiment) (2-1) In the second embodiment, the first bent rib 154 and the second bent rib 155 each have recesses 154A, 155A that are arc-shaped when viewed in the first direction.

[0073] This configuration makes it easier to increase the contact area between the first and second bending ribs 154, 155 and the electric wires 40. Therefore, the frictional force between the first and second bending ribs 154, 155 and the electric wires 40 can be increased, and therefore the movement of the electric wires 40 in the first direction relative to the electric wire accommodating portion 162 in the vicinity of the first and second bending ribs 154, 155 can be further suppressed.

[0074] <Embodiment 3> A third embodiment of the present disclosure will be described with reference to Figs. 13 to 17. A wiring module 220 according to the third embodiment is configured substantially similarly to the first embodiment, except for the configurations of a front rib 265, a rear rib 266, and an intermediate rib 267. In the second embodiment, the front-rear direction is an example of the first direction. Hereinafter, the same members as those in the first embodiment are given the same reference numerals, and detailed description of the same configurations, functions, and effects as those in the first embodiment will be omitted.

[0075] 13 and 14, the wiring module 220 of the present embodiment includes a protector 250, which includes a protector body 250A and a cover body 250B. The protector 250 includes an electric wire accommodating portion 262 that accommodates a plurality of electric wires 40. As shown in Fig. 16, the electric wire accommodating portion 262 is configured by the accommodating recess 252 of the protector body 250A and the ceiling wall 57A and intermediate rib 267 of the cover body 250B.

[0076] (Front rib 265, rear rib 266) The accommodating recess 252 includes a front rib 265 and a rear rib 266 located rearward of the front rib 265. The front rib 265 extends upward from the bottom wall 52A and extends rightward from the first side wall 52B. A right end of the front rib 265 is connected to the second side wall 52C. The rear rib 266 extends upward from the bottom wall 52A and extends leftward from the second side wall 52C. A left end of the rear rib 266 is connected to the first side wall 52B.

[0077] (Recess 265A) A recess 265A is formed on the right side of the front rib 265, recessed from the protruding end toward the bottom wall 52A. The recess 265A is formed in an arc shape when viewed from the front-rear direction. By forming the recess 265A in the front rib 265, the contact area between the main wire 41 and the front rib 265 can be increased. This makes it possible to hold the main wire 41 more firmly in the electric wire accommodating portion 262. In addition, the recess 265A can position the main wire 41 in the left-right direction.

[0078] (Recess 266A) A recess 266A is formed on the left side of the rear rib 266, recessed from the protruding end toward the bottom wall 52A. The recess 266A is formed in an arc shape when viewed from the front-rear direction. By forming the recess 266A in the rear rib 266, the contact area between the main wire 41 and the rear rib 266 can be increased. This makes it possible to hold the main wire 41 more firmly in the electric wire accommodating portion 262. In addition, the recess 266A can position the main wire 41 in the left-right direction.

[0079] (Middle rib 267) The cover 250B includes an intermediate rib 267 extending from the top wall 57A. When the cover 250B closes the protector body 250A, the intermediate rib 267 extends toward the bottom wall 52A (downward). The intermediate rib 267 is disposed between the front rib 265 and the rear rib 266 in the front-rear direction.

[0080] (Recess 267A) The intermediate rib 267 has a recess 267A recessed from the protruding end toward the ceiling wall 57A. The recess 267A is formed in an arc shape when viewed from the front-rear direction. By forming the recess 267A in the intermediate rib 267, the contact area between the main wire 41 and the intermediate rib 267 can be increased. This makes it possible to hold the main wire 41 more firmly in the wire accommodating portion 262. In addition, the recess 267A allows the main wire 41 to be positioned in the left-right direction.

[0081] When the main line 41 is accommodated in the electric wire accommodating portion 262, as shown in FIG. 13, the front rib 265 contacts the main line 41 from the left side, and the rear rib 266 contacts the main line 41 from the right side. This causes the main line 41 to be bent in a substantially S-shape in plan view. That is, the front rib 265 can be regarded as an example of a first bent rib, the rear rib 266 as an example of a second bent rib, and the left-right direction as an example of a second direction. In addition, the intermediate rib 267 is disposed between the front rib 265 and the rear rib 266 in the front-rear direction and holds the main line 41 in the up-down direction together with the bottom wall 52A. Therefore, the intermediate rib 267 can be regarded as an example of a pressing rib, and the up-down direction as an example of a third direction.

[0082] 15, the front rib 265 and the rear rib 266 contact the main line portion 41 from below, and the intermediate rib 267 contacts the main line portion 41 from above. This causes the main line portion 41 to be bent in a substantially S-shape when viewed from the left-right direction. That is, the front rib 265 and the rear rib 266 can be regarded as an example of a first bent rib, the intermediate rib 267 as an example of a second bent rib, and the up-down direction as an example of a second direction.

[0083] As described above, in this embodiment, the main wire portion 41 bends in a plan view and a side view while contacting the front rib 265, the rear rib 266, and the intermediate rib 267, so that the multiple wires 40 can be firmly held in the wire accommodating portion 262.

[0084] (Projected area 264) As shown in FIG. 17, when the electric wire accommodating portion 262 is viewed from the front-rear direction, the internal space of the electric wire accommodating portion 262 includes a continuous space (hatched portion in the figure) extending in the front-rear direction without being interrupted by the front rib 265, the rear rib 266, and the intermediate rib 267. The area of ​​this continuous space when viewed from the front-rear direction is defined as a projected area 264. In this embodiment, the projected area 264 is set to be smaller than the cross-sectional area 41A of the trunk portion 41. With this configuration, the continuous space is reduced, and the trunk portion 41 is more likely to come into contact with the front rib 265, the rear rib 266, and the intermediate rib 267. Therefore, the trunk portion 41 can be held in the electric wire accommodating portion 262 more firmly.

[0085] The effects and advantages of the third embodiment are similar to those of the first and second embodiments, and therefore will not be described.

[0086] (Other embodiments) The above-mentioned first to third embodiments can be modified as follows: The above-mentioned first to third embodiments and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0087] In the above-mentioned first to third embodiments, the peripheral wall 63 includes the bottom wall 52A, the first side wall 52B, the second side wall 52C, and the ceiling wall 57A, and is formed in a rectangular tube shape, but the peripheral wall may be, for example, cylindrical. In the above-mentioned first to third embodiments, the peripheral wall 63 is disposed so as to cover the entire outer periphery of the electric wires 40, but it is sufficient that the peripheral wall covers at least a part of the outer periphery of the electric wires. For example, the peripheral wall may not include a ceiling wall, and may be composed of a bottom wall, a first side wall, and a second side wall.

[0088] In the above first to third embodiments, the plurality of electric wires 40 are bundled together to form the trunk portion 41, but the plurality of electric wires do not have to form the trunk portion.

[0089] In the above first to third embodiments, the wire housing 62, 162, 262 is composed of the protector main body 50A, 150A, 250A and the cover body 50B, 150B, 250B, respectively, but the wire housing may be composed of a single member.

[0090] In the above first to third embodiments, the circuit board 21 is a flexible board, but the circuit board may be a rigid board. [Explanation of symbols]

[0091] 10: Energy storage module 11: Energy storage element 12: Electrode terminal 15: Small metal piece 20: Wiring module 21: Circuit Board 22: Board body 22A: Electric wire land 22B: Insertion hole 23: Extension part 23A: Connection land 30: Busbar 40: Electric wire 41: Main line 41A: Cross-sectional area of ​​trunk section 41 42: Connector 50: Protector 50A: Protector body 50B: Lid body 50C: Hinge part 51: Busbar receiving section 52: Containment recess 52A: Bottom wall 52B: First side wall 52C: 2nd side wall 53: Intermediate wiring section 53A: Placement surface 53B: Protrusion 53C: Projection receiving part 53D: Partition wall 53E: Lock receiving part 54: First flexion rib 55: Second flexion rib 56: Extra length arrangement section 57: Plate-shaped part 57A: Ceiling wall 58: Rock Club 59: Protrusion 60: Convex 61: Pressing rib 61A: Recess 62: Wire storage section 63: Surrounding wall 64: Projected area 120: Wiring module 150: Protector 150A: Protector body 150B: Lid body 152: Containment recess 154: First bending rib 154A: Recess 155: Second bending rib 155A: Recess 162: Wire storage section 164: Projected area 220: Wiring module 250: Protector 250A: Protector body 250B: Lid body 252: Containment recess 262: Wire storage section 264: Projected area 265: Front rib 265A: Recess 266: Rear rib 266A: Recess 267: Mid-rib 267A: Recess D1: Distance between the first bending rib 54 and the second bending rib 55 in the front-rear direction D2: Distance between the first side wall 52B and the second side wall 52C in the left-right direction D3: Diameter of trunk section 41 D4: Distance between the first bending rib 54 and the second bending rib 55 in the left-right direction

Claims

1. A wiring module attached to a plurality of energy storage elements, A plurality of wires; A plurality of circuit boards; a protector for holding the plurality of circuit boards and the plurality of electric wires, Each of the electric wires is electrically connected to each of the circuit boards, The protector includes an electric wire housing portion extending in a first direction and housing the electric wires, The electric wire accommodating portion includes a peripheral wall arranged to surround the plurality of electric wires, and a first bent rib and a second bent rib extending from the peripheral wall toward an inside of the electric wire accommodating portion, The first bending rib is disposed at a position shifted from the second bending rib in the first direction, The first bent rib extends from the peripheral wall to one side in a second direction perpendicular to the first direction, The second bent rib extends from the peripheral wall to the other side in the second direction.

2. The wire accommodating portion further includes a pressing rib extending inward from the peripheral wall of the wire accommodating portion, The pressing rib is disposed between the first bending rib and the second bending rib in the first direction, The wiring module according to claim 1 , wherein the electric wires are clamped by the peripheral wall and the pressing rib in a third direction perpendicular to the first direction and intersecting with the second direction.

3. The wiring module according to claim 2 , wherein the pressing rib has a recess that is arc-shaped when viewed in the first direction.

4. The wiring module according to claim 1 , wherein the first bent rib and the second bent rib each have a recess that is arc-shaped when viewed in the first direction.

5. The plurality of electric wires are bundled together to form a trunk portion, 3 . The wiring module according to claim 1 , wherein a projected area of ​​an internal space of the electric wire accommodating portion when viewed in the first direction is set to be smaller than a cross-sectional area of ​​the main wire portion.

6. The peripheral wall includes a first wall portion from which the first bending rib extends and a second wall portion from which the second bending rib extends, the second wall portion faces the first wall portion in the second direction, 3. The wiring module according to claim 1, wherein a distance between the first bent rib and the second bent rib in the first direction is set to be smaller than three times a distance between the first wall portion and the second wall portion in the second direction.

7. The protector includes a protector body and a cover body that is overlapped with the protector body in a direction perpendicular to the first direction, 3. The wiring module according to claim 1, wherein the wire housing portion is composed of the protector body and the lid.

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