JP7516890B2 - Wiring Module - Google Patents

Description

This specification discloses technology related to wiring modules.

Conventionally, wiring modules that are mounted on vehicles such as electric vehicles and hybrid vehicles are known. The wiring module of JP 2013-45508 A (Patent Document 1) includes a flexible printed circuit board on which multiple conductive paths are formed. A connector portion is provided at the end of the flexible printed circuit board, and information related to the vehicle's status can be sent to the outside.

JP 2013-45508 A

However, in the configuration of Patent Document 1, if the number of electric wires increases due to higher voltages in vehicle wire harnesses, the connector section becomes multipolar and large in size. This makes it difficult to reduce the height of the wiring module.

The wiring module described in this specification includes a first flexible printed circuit board and a second flexible printed circuit board provided separately from the first flexible printed circuit board, the first flexible printed circuit board and the second flexible printed circuit board are arranged so as to be continuous in a first direction and are in the form of a strip extending in the first direction, a connector is attached to each of the first flexible printed circuit board and the second flexible printed circuit board, and the mating direction in which the connector attached to the first flexible printed circuit board is mated with the mating connector is different from the mating direction in which the connector attached to the second flexible printed circuit board is mated with the mating connector.

The technology described in this specification makes it possible to provide a wiring module that can be made low-profile.

FIG. 1 is a perspective view showing an electricity storage module according to a first embodiment. FIG. 2 is a perspective view showing the wiring module. FIG. 3 is a plan view showing the wiring module. FIG. 4 is a cross-sectional view taken along line AA of FIG. FIG. 5 is a cross-sectional view taken along line BB of FIG. FIG. 6 is a cross-sectional view taken along the line CC of FIG. FIG. 7 is a cross-sectional view taken along line DD of FIG. FIG. 8 is a perspective view illustrating a process of assembling the first FPC and the second FPC to the protector. FIG. 9 is a perspective view showing a state in which the first FPC and the second FPC are assembled to the protector. FIG. 10 is a schematic diagram showing a vehicle equipped with a power storage module. FIG. 11 is a plan view showing the energy storage module of the second embodiment.

[Description of the embodiments of the present disclosure]
First, the embodiments of the present disclosure will be listed and described.
(1) The wiring module of the present disclosure includes a first flexible printed board and a second flexible printed board provided separately from the first flexible printed board, the first flexible printed board and the second flexible printed board are arranged in a first direction and are formed into a belt shape extending in the first direction, a connector is attached to each of the first flexible printed board and the second flexible printed board, and a mating direction in which the connector attached to the first flexible printed board mates with a mating connector is different from a mating direction in which the connector attached to the second flexible printed board mates with a mating connector.
According to the above configuration, since a connector is attached to each of the first and second flexible printed circuit boards and two connectors are provided in the entire wiring module, the dimensions (e.g., height and width) of the connectors can be made smaller than in a configuration in which one connector is provided on one flexible printed circuit board, thereby enabling the wiring module to have a low profile.

(2) The connector attached to the first flexible printed circuit board is attached to an end of the first flexible printed circuit board opposite to the second flexible printed circuit board.
This facilitates the mating of the connector mounted on the first flexible printed circuit board with the mating connector.

(3) The connector attached to the second flexible printed circuit board is attached to an end of the second flexible printed circuit board opposite to the end of the first flexible printed circuit board.
This makes it easier to fit the connector mounted on the second flexible printed circuit board to the mating connector.

(4) The connector is disposed on an inner side of the first flexible printed circuit board or the second flexible printed circuit board in the first direction.
In this way, the size of the line module in the first direction can be reduced.

(5) The connector is disposed on an inner side of the first flexible printed circuit board or the second flexible printed circuit board in a second direction perpendicular to the first direction.
In this way, the size of the line module in the second direction can be reduced.

(6) The connector is open in the first direction.
In this way, the connector and the mating connector can be fitted together in the first direction.

(7) At least one of the first flexible printed circuit board and the second flexible printed circuit board has a first extension portion extending in a strip-like shape and a second extension portion extending in a strip-like shape along the first extension portion and at a distance from the first extension portion.
In this way, even in a configuration in which a flexible printed circuit board cannot be disposed in the region between the first extension portion and the second extension portion, it is possible to reduce the height of the wiring module.

(8) An insulating protector having a first region in which the first flexible printed circuit board is arranged and a second region in which the second flexible printed circuit board is arranged, the first flexible printed circuit board and the second flexible printed circuit board each have a fixed portion fixed to the protector.
In this way, the first flexible printed circuit board and the second flexible printed circuit board can be fixed to the protector and integrated, which makes transportation, installation, and the like easier.

(9) The first flexible printed circuit board and the second flexible printed circuit board have mounting surfaces on which the connector is mounted, and the protector has a mounting recess that is recessed on the opposite side to the connector in an area corresponding to the mounting surfaces on at least one of the first flexible printed circuit board and the second flexible printed circuit board.
In this way, it is possible to reduce the height dimension of the wiring module at the portion where the connector is attached.

(10) The protector has mounting recesses recessed on the opposite side to the connector in areas of both the first flexible printed circuit board and the second flexible printed circuit board that correspond to the mounting surfaces.
In this way, it is possible to further reduce the height dimension of the wiring module at the portion where the connector is attached.

(11) The above-described wiring module is a wiring module for a vehicle that is mounted on a vehicle for use.
In this way, the height of the wiring module can be reduced, and the space occupied by the electricity storage pack, etc. inside the vehicle can be reduced.

[Details of the embodiment of the present disclosure]
Specific examples of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

<Embodiment 1>
The first embodiment will be described with reference to FIGS.
10, the power storage module 10 of the present embodiment is applied to a power storage pack 2 mounted on a vehicle 1. The power storage pack 2 is mounted on a vehicle 1 such as an electric vehicle or a hybrid vehicle, and is used as a drive source for the vehicle 1. In the following description, reference numerals may be given to only some of a plurality of members, and the reference numerals of the other members may be omitted.

(overall structure)
As shown in Fig. 10, an electricity storage pack 2 is disposed near the center of a vehicle 1. A PCU 3 (Power Control Unit) is disposed in the front of the vehicle 1. The electricity storage pack 2 and the PCU 3 are connected by a wire harness 4. The electricity storage pack 2 and the wire harness 4 are connected by a connector (not shown). The electricity storage pack 2 has an electricity storage module 10 including a plurality of electricity storage elements 11. The electricity storage module 10 (and the wiring module 20) can be mounted in any orientation, but in the following description, the X direction in Fig. 1 is the forward direction, the Y direction is the leftward direction, and the Z direction is the upward direction. The front-rear direction is an example of a first direction, and the left-right direction is an example of a second direction.

(Electricity storage module 10)
1, the energy storage module 10 includes a plurality of energy storage elements 11 arranged in a row, and a wiring module 20 attached to the upper surfaces of the plurality of energy storage elements 11. The energy storage element 11 has a flat rectangular parallelepiped shape in which an energy storage element (not shown) is housed, and has positive and negative electrode terminals 12A, 12B on the upper surface.

(Wiring module 20)
As shown in Figures 2 and 3, the wiring module 20 includes a first flexible printed circuit board (hereinafter referred to as the "first FPC 21"), a second flexible printed circuit board (hereinafter referred to as the "second FPC 22"), a plurality of bus bars 35, and a protector 40 that holds the first FPC 21, the second FPC 22, and the plurality of bus bars 35.

(First FPC 21 and second FPC 22)
The first FPC 21 and the second FPC 22 each include a flexible FPC body 23 and a connector 30 attached to one end of the FPC body 23. The FPC body 23 includes a base film made of insulating synthetic resin, a conductive path wired to the base film, and an insulating layer made of an insulating overlay film, coating film, or the like that covers the base film. The first FPC 21 and the second FPC 22 can be formed by, for example, printing, etching, plating, or the like.

As materials for the base film and the insulating layer, any synthetic resin can be used as necessary, such as a thermosetting resin such as epoxy resin, a thermoplastic resin, or a liquid crystal polymer (LCP). As thermoplastic resins, any thermoplastic resin can be used as necessary, such as polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), or polyimide (PI). The conductive path is made of a metal foil such as copper, a copper alloy, aluminum, or an aluminum alloy, and electronic components are mounted on it. The electronic components are made of a field effect transistor (FET), resistor, capacitor, coil, thermistor, etc.

Each FPC body 23 of the first FPC 21 and the second FPC 22 includes a base 24 having an area where the connector 30 is attached, and a pair of extensions 26A, 26B that extend in a strip-like manner in the front-rear direction relative to the base 24. The base 24 has a pair of slits 25 that divide both sides of the connector 30. The connector 30 is attached to the inner attachment surface 24A (FIG. 5) of the pair of slits 25. As shown in FIG. 2, the pair of extensions 26A, 26B includes a first extension 26A and a second extension 26B that have different lengths in the front-rear direction (extension direction), both of which have a smaller width dimension relative to the base 24 and extend parallel to each other with a gap therebetween. A gap is provided between the pair of extensions 26A, 26B of the first FPC 21 and the pair of extensions 26A, 26B of the second FPC 22, through which the protector 40 is exposed.

As shown in FIG. 8, a plurality of first through holes 27 and a plurality of second through holes 28 are formed through each FPC body 23 of the first FPC 21 and the second FPC 22. The first through holes 27 are oval shapes that are long in the front-rear direction, and are arranged side by side at a predetermined interval in the front-rear direction so as to pass through a pair of extension parts 26A, 26B of each FPC body 23. In addition, one first through hole 27 is provided on the central side of the base 24. The hole diameter in the major axis direction (front-rear direction) of the first through hole 27 is appropriately set according to the tolerance between the protrusion 43 of the protector 40 described later that occurs depending on the length of each FPC body 23 in the extension direction (front-rear direction).

As shown in Figs. 5 and 7, the second through holes 28 are circular and have a diameter smaller than the diameter of the first through holes 27 in the front-rear direction, and are provided near the connector 30. Specifically, a pair of second through holes 28 are provided inside the slits 25 on both sides of the connector 30, side by side on the rear side of the connector 30. As shown in Figs. 4 and 5, the vicinity (hole edge) of the first through hole 27 and the second through hole 28 in the FPC body 23 is made into a fixed part 29 that is fixed to the protector 40. As shown in Fig. 5, a reinforcing plate 33 is superimposed under the front and rear ends of the FPC body 23. Through holes 33A connected to the second through holes 28 are formed through the reinforcing plate 33, and are fixed to the FPC body 23 by adhesive or the like.

(Connector 30)
The connector 30 includes a housing 31 made of synthetic resin and a connector terminal 32 held by the housing 31. The connector terminal 32 is soldered to a land connected to a conductive path of the FPC body 23. The connector 30 is connected to a mating connector connected to an end portion of the electric wire. The mating connector is connected to an external ECU (Electronic Control Unit) or the like via the electric wire. The voltage of the bus bar 35 is output to the ECU via the conductive path of the FPC body 23. The ECU is equipped with a microcomputer, elements, etc., and has a well-known configuration having functions for detecting the voltage, current, temperature, etc. of each storage element 11 and controlling the charging and discharging of each storage element 11.

As shown in FIG. 5, the connector 30 provided on the first FPC 21 opens rearward and is attached to the rear end of the first FPC 21, so that the mating connector is inserted from rear to front into the connector 30 and engaged. On the other hand, the connector 30 provided on the second FPC 22 opens forward and is attached to the front end of the second FPC 22, so that the mating connector is inserted from front to rear into the connector 30 and engaged. That is, the mating connector can be engaged from the front and rear into the connector 30 arranged at the front and rear ends of the wiring module 20 (and the energy storage module 10). Also, as shown in FIG. 3, each connector 30 is arranged inside the outer edge of the first FPC 21 or the second FPC 22, so that the dimensions of the wiring module 20 in the front-rear and left-right directions can be reduced.

Since the connector 30 is attached to the first FPC 21 and the second FPC 22, two connectors 30 are provided in the entire wiring module 20. Therefore, compared to a wiring module configuration in which one connector is attached to one FPC, the number of connector terminals (number of poles) per connector can be reduced, and the dimensions of the connector can be made smaller. For example, in FIG. 5 of this embodiment, the connector 30 is a so-called single-stage type in which the tips of the connector terminals 32 are arranged at the same height inside the housing 31, which leads to a reduction in the height of the wiring module 20. On the other hand, if there was only one connector, the connector terminals would be concentrated in one place, making the connector a two-stage type, and it is considered that the height dimension of the connector (and the wiring module) would double.

(Bus bar 35)
The bus bar 35 is rectangular and made of a metal plate material such as copper, a copper alloy, aluminum, an aluminum alloy, or the like, and connects adjacent electrode terminals 12A, 12B. A connecting piece 36 that can be connected to a land continuing to the conductive paths of the first FPC 21 and the second FPC 22 is provided on the periphery of the bus bar 35. The connecting piece 36 and the land are connected by soldering or the like.

(Protector 40)
The protector 40 is made of insulating synthetic resin, and as shown in Fig. 8, includes a plate-shaped protector body 41 and bus bar installation sections 46 that are connected to both sides of the protector body 41 and in which the bus bars 35 are installed. Mounting recesses 45 that are recessed on the upper surface side are formed at both ends in the front-rear direction of the protector body 41. The connector 30 is installed in the mounting recess 45, thereby reducing the height of the end of the wiring module 20.

The protector body 41 has a first region 42A on which the first FPC 21 is placed, a second region 42B on which the second FPC 22 is placed, and a ventilation region 42C surrounded by the first region 42A and the second region 42B. The ventilation region 42C is a region that extends in a band shape in the front-to-rear direction, and has a plurality of ventilation holes 44 that penetrate the protector body 41 lined up in the front-to-rear direction. The ventilation holes 44 are capable of discharging gas generated from the energy storage element 11 to the outside, for example.

In the first region 42A and the second region 42B, protrusions 43 for positioning the first FPC 21 and the second FPC 22 stand up from the plate surface. The protrusions 43 are cylindrical and can be inserted into each of the first through holes 27 and the second through holes 28, and are provided at positions corresponding to the first through holes 27 and the second through holes 28. Specifically, they are arranged at intervals in the front-rear direction on the peripheral side of the protector main body 41, and are also formed in and near the mounting recess 45. The multiple protrusions 43 are deformed, for example, by heat welding, to fix the first FPC 21 and the second FPC 22 to the protector 40. Before welding, the protrusions 43 are set to a height (axial dimension) that penetrates the through holes 27, 28 and protrudes above the through holes 27, 28 when the first FPC 21 and the second FPC 22 are placed in a predetermined position on the protector 40. On the other hand, when the protrusions 43 melt and solidify by thermal welding, a rivet-shaped locking portion 43A with a diameter larger than the first through hole 27 and the second through hole 28 is formed on the FPC body 23, as shown in Figures 4 and 5.

Each busbar mounting section 46 holds multiple busbars 35 aligned in the front-rear direction, and as shown in FIG. 8, is provided with multiple through-holes 47 for passing the electrode terminals 12A, 12B of the energy storage element 11, restriction claws 48 for restricting the removal of the busbars 35, and insulating walls 49 for insulating adjacent busbars 35 in the alignment direction.

The assembly of the wiring module 20 will be described.
As shown in FIG. 8, four (plural) convex parts 43 at the end of the protector 40 in the front-rear direction are inserted into two (plural) first through holes 27 and two (plural) second through holes 28 corresponding to one of the first FPC 21 and the second FPC 22. Here, since the clearance between each second through hole 28 and the corresponding convex part 43 is small, one end (end on the connector 30 side) of the first FPC 21 and the second FPC 22 is positioned based on the position of the second through hole 28. Then, for the FPC body 23, the corresponding convex parts 43 are inserted in order from the first through hole 27 closer to the connector 30. At this time, a tolerance occurs between the position of the convex part 43 and the position of the first through hole 27 depending on the length of the first FPC 21, but the length of one of the first FPC 21 and the second FPC 22 is shorter than the entire length of the protector 40 in the front-rear direction. As a result, the tolerance between the convex portions 43 and the first through holes 27 is set to a tolerance range that does not cause any hindrance to inserting the convex portions 43 corresponding to all of the first through holes 27. That is, in the present embodiment, the first FPC 21 and the second FPC 22 are arranged so as to be continuous in the front-rear direction and form a band extending in the front-rear direction, so that it is possible to absorb the tolerance with the protector 40 in the extension direction of the first FPC 21 and the second FPC 22 (front-rear direction) in which the tolerance between the first FPC 21 and the second FPC 22 and the protector 40 tends to become large.
Similarly, for the other of the first FPC 21 and the second FPC 22, the four (multiple) protrusions 43 on the end side of the protector 40 are inserted into the corresponding first through holes 27 and second through holes 28 of the second FPC 22, and after positioning by the second through holes 28 and the corresponding protrusions 43, the corresponding protrusions 43 are inserted into the first through holes 27 in order, starting from the first through hole 27 closest to the connector 30 (Figure 9).

Then, with the first FPC 21 and the second FPC 22 placed in predetermined positions on the protector 40, the protrusions 43 that pass through the first through-holes 27 and the second through-holes 28 are thermally welded using a tool or the like (see FIGS. 4 and 5). As a result, the tip sides of the protrusions 43 melt to become locking portions 43A, and the FPC body 23 is fixed to the protector 40. Next, the multiple bus bars 35 are arranged in the bus bar arrangement portion 46, and the connection pieces 36 are soldered to the lands of the FPC body 23. This completes the wiring module 20 (FIG. 2).
Next, the wiring module 20 is disposed on the plurality of energy storage elements 11, and each bus bar 35 is connected to adjacent electrode terminals 12A, 12B by welding or the like, thereby forming the energy storage module 10 (FIG. 1).

According to this embodiment, the following actions and effects are obtained.
The wiring module 20 includes a first FPC 21 and a second FPC 22 provided separately from the first FPC 21. The first FPC 21 and the second FPC 22 are arranged so as to be continuous in the front-to-rear direction and are formed into a strip extending in the front-to-rear direction. The first FPC 21 and the second FPC 22 each have a connector 30 attached thereto. The mating direction in which the connector 30 attached to the first FPC 21 mates with the mating connector is different from the mating direction in which the connector 30 attached to the second FPC 22 mates with the mating connector.
According to the present embodiment, the connectors 30 are attached to the first FPC 21 and the second FPC 22, respectively, and thus two connectors 30 are provided in the entire wiring module 20, so that the dimensions (e.g., height and width) of the connectors 30 can be made smaller than in a configuration in which one connector is provided on one FPC. This enables the wiring module 20 to have a low profile.

The connector 30 attached to the first FPC 21 is attached to the end of the first FPC 21 opposite to the second FPC 22 .
This makes it easier to fit the connector 30 attached to the first FPC 21 into the mating connector.

The connector 30 is attached to the end of the second FPC 22 opposite to the first FPC 21 .
This makes it easier to fit the connector 30 attached to the second FPC 22 into the mating connector.

The connector 30 is disposed inside the first FPC 21 or the second FPC 22 in the front-rear direction.
In this way, the size of the line module 20 can be reduced in the front-rear direction.

The connector 30 is disposed inside the first FPC 21 or the second FPC 22 in the left-right direction.
In this way, the size of the line module 20 can be reduced in the left-right direction.

Moreover, the connector 30 is open in the front-rear direction.
In this way, the connector 30 and the mating connector can be fitted together in the front-rear direction.

At least one of the first FPC 21 and the second FPC 22 includes a first extending portion 26A extending in a strip-like shape, and a second extending portion 26B extending in a strip-like shape along the first extending portion 26A and spaced apart from the first extending portion 26A.
In this way, even in a configuration in which an FPC cannot be disposed in the region between the first extending portion 26A and the second extending portion 26B, the height of the wiring module 20 can be reduced.

It also includes an insulating protector 40 having a first area 42A in which the first FPC 21 is arranged and a second area 42B in which the second FPC 22 is arranged, and the first FPC 21 and the second FPC 22 each have a fixed portion 29 that is fixed to the protector 40.
In this way, the first FPC 21 and the second FPC 22 can be fixed to the protector 40 and integrated, which makes transportation, installation, and the like easier.

In addition, the first FPC 21 and the second FPC 22 have a mounting surface 24A on which the connector 30 is mounted, and the protector 40 has a mounting recess 45 recessed on the opposite side to the connector 30 in an area corresponding to the mounting surface 24A on at least one of the first FPC 21 and the second FPC 22.
In this way, it is possible to reduce the height dimension of the line module 20 at the portion where the connector 30 is attached.

The protector 40 also has mounting recesses 45 recessed on the opposite side to the connector 30 in areas corresponding to the mounting surfaces 24 A of both the first FPC 21 and the second FPC 22 .
In this way, it is possible to further reduce the height dimension of the line module 20 at the portion where the connector 30 is attached.

The above-described wiring module 20 is a wiring module 20 for a vehicle that is mounted on a vehicle 1 for use.
In this way, the height of the wiring module 20 can be reduced, and the space occupied by the electricity storage packs 2 and the like inside the vehicle 1 can be reduced.

<Embodiment 2>
The second embodiment will be described with reference to Fig. 11. In the following description, the same members and effects as those of the first embodiment will not be described.
The energy storage module 110 of this embodiment is configured by mounting a wiring module 120 to a plurality of energy storage elements 11. The energy storage module 110 (and the wiring module 120) can be mounted in any orientation, but the following description will be given with the X direction in Fig. 11 as the forward direction and the Y direction as the leftward direction. Note that the front-rear direction is an example of a first direction, and the left-right direction is an example of a second direction.

(Electricity storage module 110)
As shown in FIG. 11 , the energy storage module 110 includes a plurality of energy storage elements 11 arranged in a line, and a wiring module 120 attached to the upper surfaces of the plurality of energy storage elements 11 .

(Wiring module 120)
11 , the wiring module 120 includes a first FPC 121, a second FPC 122, and a plurality of bus bars 35. Unlike the wiring module 20 of the first embodiment, the wiring module 120 does not include a protector, but provides the same effects as those of the first embodiment.

(First FPC 121 and second FPC 122)
Each of the first FPC 121 and the second FPC 122 includes a flexible FPC body 123 and a connector 30 attached to one end of the FPC body 123 .

Each FPC body 123 of the first FPC 121 and the second FPC 122 includes a base 124 having an area where the connector 30 is attached, and a pair of extensions 126A, 126B that extend in a strip-like manner in the front-to-rear direction relative to the base 124. The connector 30 opens on the side of the base 124 opposite the pair of extensions 126A, 126B, and is adapted to be mated with a mating connector in the front-to-rear direction.

The assembly of the wiring module 120 will be described.
The bus bars 35 are soldered to the lands of the FPC body 123. In this way, the wiring module 120 is formed.
Next, the wiring module 120 is placed on the plurality of energy storage elements 11 so that the connectors 30 are disposed at the front end and the rear end of the energy storage module 110. The energy storage module 110 is formed by connecting each bus bar 35 to adjacent electrode terminals by welding or the like.

As an alternative to the above method of assembling the wiring module 120, a method can be adopted in which, after each bus bar 35 is connected to the energy storage element 11, the first FPC 121 and the second FPC 122 are placed on the multiple energy storage elements 11, and the multiple bus bars 35 are connected to each FPC body 123.

<Other embodiments>
The technology described in this specification is not limited to the embodiments described in the above description and drawings, and for example, the following embodiments are also included in the technical scope of the technology described in this specification.
(1) The connector 30 is configured to be arranged inside the first FPC 21, 121 or the second FPC 22, 122 in the front-to-back and left-to-right directions, but the connector may be configured to protrude outside the first FPC and second FPC in the front-to-back and left-to-right directions.
(2) Although the wiring modules 20 and 120 are configured to include the bus bar 35, the wiring modules may be configured to not include a bus bar.

(3) The shapes of the first through hole 27 and the second through hole 28 are not limited to those in the above embodiment. For example, the first through hole may be a perfect circle having a size (diameter) that can absorb tolerances.
(4) Although the protrusions 43 are inserted into the first through-holes 27 and the second through-holes 28 of the first FPC 21 and the second FPC 22, the present invention is not limited to this. For example, the first FPC and the second FPC may have protrusions that are inserted into recesses in the protector. Also, for example, the ends of the first FPC and the second FPC may be fixed to the protector by a fixing means (such as tape wrapping).

(5) The wiring modules 20 and 120 may be configured to include an FPC (such as a third FPC) other than the first FPC 21 and the second FPC 22 and 122 .
(6) The first FPC 21, 121 and the second FPC 22, 122 are configured to include the first extension portion 26A, 126A and the second extension portion 26B, 126B, but are not limited to this. For example, the first FPC and the second FPC may be shaped to extend as long as the width of their base portions.

1: Vehicle 2: Power storage pack 3: PCU
4: Wire harness 10, 110: Energy storage module 11: Energy storage elements 12A, 12B: Electrode terminals 20, 120: Wiring module 21, 121: First FPC (first flexible printed circuit board)
22, 122: Second FPC (second flexible printed circuit board)
23, 123: FPC main body 24, 124: Base portion 24A: Mounting surface 25: Slit portion 26A, 126A: First extension portion 26B, 126B: Second extension portion 27: First through hole 28: Second through hole 29: Fixed portion 30: Connector 31: Housing 32: Connector terminal 33: Reinforcing plate 33A: Through hole 35: Bus bar 36: Connection piece 40: Protector 41: Protector main body 42A: First region 42B: Second region 42C: Ventilation region 43: Protrusion 43A: Locking portion 44: Ventilation hole 45: Mounting recess 46: Bus bar arrangement portion 47: Through hole 48: Restricting claw 49: Insulating wall

Claims (12)

A wiring module that is attached to a stack of a plurality of energy storage elements that constitute one energy storage module, and is connected to two mating connectors provided outside the wiring module ,
A first flexible printed circuit board;
a second flexible printed circuit board provided separately from the first flexible printed circuit board,
the first flexible printed circuit board and the second flexible printed circuit board are arranged so as to be continuous in a first direction which is a longitudinal direction of the first flexible printed circuit board and the second flexible printed circuit board, and are formed into a strip shape extending in the first direction;
a connector is attached to each of the first flexible printed circuit board and the second flexible printed circuit board;
a mating direction in which the connector mounted on the first flexible printed circuit board is mated with one of the two mating connectors;
a wiring module in which the connector mounted on the second flexible printed circuit board is fitted to the other of the two mating connectors in different fitting directions. The wiring module according to claim 1, wherein the connector attached to the first flexible printed circuit board is attached to an end of the first flexible printed circuit board opposite the second flexible printed circuit board. The wiring module according to claim 2, wherein the connector attached to the second flexible printed circuit board is attached to an end of the second flexible printed circuit board opposite the first flexible printed circuit board. The wiring module according to any one of claims 1 to 3, wherein the connector is disposed inside the first flexible printed circuit board or the second flexible printed circuit board in the first direction. The wiring module according to any one of claims 1 to 4, wherein the connector is disposed inside the first flexible printed circuit board or the second flexible printed circuit board in a second direction perpendicular to the first direction. the connector attached to the first flexible printed circuit board is attached to an end of the first flexible printed circuit board opposite to the second flexible printed circuit board,
the connector attached to the first flexible printed circuit board is disposed on an inner side of the first flexible printed circuit board in the first direction,
the connector attached to the first flexible printed circuit board is disposed on an inner side of the first flexible printed circuit board in a second direction perpendicular to the first direction,
The wiring module according to claim 1 , wherein the first flexible printed circuit board has a pair of slits that divide both sides of the connector. The wiring module according to any one of claims 1 to 6, wherein the connector is open in the first direction. The wiring module according to any one of claims 1 to 7, wherein at least one of the first flexible printed circuit board and the second flexible printed circuit board has a first extension portion extending in a strip shape and a second extension portion extending in a strip shape along the first extension portion and spaced apart from the first extension portion. an insulating protector having a first region in which the first flexible printed circuit board is disposed and a second region in which the second flexible printed circuit board is disposed;
The wiring module according to claim 1 , wherein the first flexible printed circuit board and the second flexible printed circuit board each include a fixed portion that is fixed to the protector. the first flexible printed circuit board and the second flexible printed circuit board have mounting surfaces to which the connectors are attached;
The wiring module according to claim 9 , wherein the protector has a mounting recess recessed on the opposite side to the connector in an area corresponding to the mounting surface of at least one of the first flexible printed circuit board and the second flexible printed circuit board. The wiring module according to claim 10, wherein the protector has a mounting recess recessed on the opposite side to the connector in an area corresponding to the mounting surface on both the first flexible printed circuit board and the second flexible printed circuit board. A wiring module for a vehicle that is mounted on a vehicle and used, the wiring module being described in any one of claims 1 to 11.

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