Wiring Module

Abstract

To provide a wiring module capable of restraining damage of an electric wire, a circuit board and a connection part.SOLUTION: A wiring module 20 mounted to plural power storage elements comprises plural circuit boards, plural electric wires 40, and a protector 50 holding the plural circuit boards and the plural electric wires 40. The electric wire 40 is connected to the circuit board, and at least some of the plural electric wires 40 are integrally bundled to constitute a trunk line 43. The protector 50 comprises a locating face 54, on which the circuit board is located, an electric housing part 52 for housing the plural electric wires 40, and a trunk line housing part 57 overlaid on the electric wire housing part 52 in a direction orthogonal to the locating face 54 and housing at least one part of the trunk line 43. The plural electric wires 40 include at least one overlapping electric wire arranged to be overlaid on the trunk line 43 when seen from the first direction, and the trunk line housing part 57 isolates the trunk line 43 from at least one overlapping electric wire.SELECTED DRAWING: Figure 6

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 typically have a large number of stacked battery cells electrically connected in series or parallel by a wiring module. A conventional wiring module of this type is described in JP 2018-85201 A (Patent Document 1 below). This wiring module includes bus bar terminals that interconnect energy storage elements, detection wires that are connected to the bus bar terminals, and female connectors that are connected to the detection wires. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-85201 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, multiple detection wires are bundled together by a tubular member on the female connector side. In the above configuration, for example, if electric wires other than the detection wires are provided, the detection wires bundled together by the tubular member and individual electric wires may be arranged in the same routing region of the insulating protector. In such a case, friction may occur between the individual electric wires and the tubular member due to vibrations in the vehicle in which the wiring module is installed. Furthermore, friction may also occur between the individual electric wires and the tubular member due to displacement of the detection wires in the routing direction when connecting the female connector to the male connector on the equipment side. When friction occurs between the individual electric wires and the tubular member, stress acts on the connection between the individual electric wires and other components, such as a bus bar terminal or a circuit board, potentially damaging the connection. [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 circuit boards, a plurality of electric wires, and a protector that holds the plurality of circuit boards and the plurality of electric wires, wherein the electric wires are connected to the circuit boards, and at least some of the plurality of electric wires are bundled together to form a main wire, and the protector includes a mounting surface on which the circuit board is placed, an electric wire accommodating section that accommodates the plurality of electric wires, and a main wire accommodating section that is overlapped on the electric wire accommodating section in a first direction perpendicular to the mounting surface and accommodates at least some of the main wires, wherein the plurality of electric wires include at least one overlapping electric wire arranged overlapping the main wire when viewed from the first direction, and the main wire accommodating section separates the main wire from the at least one overlapping electric wire. [Effects 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 electric wire and the circuit board. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing a vehicle equipped with a power storage module according to an embodiment. [Figure 2] FIG. 2 is a plan view of the energy storage module when the trunk line is in a contracted state. [Figure 3] FIG. 3 is a plan view of the power storage module when the trunk line is in an extended state. [Figure 4] FIG. 4 is a plan view of the electricity storage module with the cover removed when the trunk line is in a contracted state. [Figure 5] FIG. 5 is a plan view of the electricity storage module with the cover removed when the main line is in an extended state. [Figure 6] FIG. 6 is a cross-sectional view taken along line AA in FIG. [Figure 7] FIG. 7 is a perspective view of the cover. DETAILED DESCRIPTION OF THE INVENTION

[0008] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described.

[0009] (1) A wiring module of the present disclosure is a wiring module attached to a plurality of energy storage elements, and includes a plurality of circuit boards, a plurality of electric wires, and a protector that holds the plurality of circuit boards and the plurality of electric wires, wherein the electric wires are connected to the circuit boards, and at least some of the plurality of electric wires are bundled together to form a trunk line, and the protector includes a mounting surface on which the circuit board is placed, an electric wire accommodating section that accommodates the plurality of electric wires, and a trunk line accommodating section that is overlapped on the electric wire accommodating section in a first direction perpendicular to the mounting surface and accommodates at least some of the trunk line, wherein the plurality of electric wires include at least one overlapping electric wire arranged overlapping the trunk line when viewed from the first direction, and the trunk line accommodating section separates the trunk line from the at least one overlapping electric wire.

[0010] According to this configuration, the main line accommodating section separates the main line and the superposed electric wires, so that friction between the main line and the superposed electric wires does not occur, thereby suppressing damage to the connection between the superposed electric wires and the circuit board.

[0011] Furthermore, since the superposed electric wires are arranged so as to overlap with the main wires when viewed from the first direction, the area in which the superposed electric wires and the main wires are routed can be reduced in the direction parallel to the mounting surface, thereby making it possible to reduce the size of the wiring module.

[0012] (2) It is preferable that the protector comprises a protector body and a cover that is stacked on the protector body in the first direction, the protector body comprising the placement surface and the electric wire accommodating portion, and the cover comprising a top plate portion that faces the placement surface in the first direction and the main line accommodating portion that is recessed from the top plate portion.

[0013] With this configuration, the trunk line housing can be easily configured, and the mounting surface can be covered with the top plate.

[0014] [Details of the embodiments of the present disclosure] The present disclosure will be described below with reference to exemplary embodiments. The present disclosure is not limited to these examples, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0015] <Embodiment> An embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 7. An electricity storage module 10 including a wiring module 20 of the present embodiment is applied to an electricity storage pack 2 mounted on a vehicle 1, for example, as shown in Fig. 1. The electricity storage pack 2 is mounted on the 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, when multiple identical members are used, only some of the members may be designated by reference numerals, and the reference numerals for the other members may be omitted.

[0016] As shown in FIG. 1, 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 equipped with a plurality of electricity storage elements 11. In the following description, except for FIG. 1, the direction indicated by arrow Z is defined as upward, the direction indicated by arrow X is defined as forward, and the direction indicated by arrow Y is defined as leftward.

[0017] As shown in Fig. 2, 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. Each energy storage element 11 has a flat rectangular parallelepiped shape with energy storage elements housed inside. Although not shown, the energy storage element 11 has a pair of electrode terminals located near the right end and the left end of the upper surface. One of the pair of electrode terminals is a positive electrode, and the other is a negative electrode.

[0018] [Wiring module] 4 and 5, the wiring module 20 includes a bus bar 30 connected to the electrode terminals of the energy storage elements 11, a plurality of circuit boards CB, a plurality of electric wires 40, and a protector 50 that holds the bus bar 30, the plurality of circuit boards CB, and the plurality of electric wires 40. At least one electric wire 40 is connected to each of the plurality of circuit boards CB.

[0019] The busbar 30 is made of a metal plate and has a rectangular shape in a plan view. As shown in FIGS. 2 and 3, the busbar 30 includes a connection busbar 30A that connects adjacent electrode terminals in the stacking direction (front-rear direction) of the plurality of energy storage elements 11, and an output busbar 30B that connects to the electrode terminals of the energy storage elements 11 arranged at the ends in the stacking direction. The output busbar 30B connects the total positive electrodes or total negative electrodes of the plurality of energy storage elements 11 to an external device. The busbar 30 is connected to the electrode terminals by welding or the like. The busbar 30 is housed in a busbar housing portion 51 of a protector 50, which will be described later.

[0020] [Circuit board] As shown in FIGS. 4 and 5 , the multiple circuit boards CB according to this embodiment include multiple first circuit boards 21 and at least one second circuit board 24. In this embodiment, the first circuit board 21 is a flexible board, configured by forming conductive paths on the surface of a flexible insulating sheet using printed wiring technology. The first circuit board 21 includes a board main body 22 and an extension portion 23 extending from the board main body 22. The board main body 22 has a generally rectangular shape in a plan view. The board main body 22 is fixed to a mounting surface 54 of a protector 50, which will be described later. Although not shown in detail, for example, the board main body 22 has an insertion hole through which a protrusion protruding from the mounting surface 54 is inserted. The board main body 22 is provided with a wire land 22A disposed at one end of the conductive path. The wire land 22A is connected to a voltage detection line 41, which will be described later, by soldering or the like.

[0021] The extension portion 23 has a generally U-shape in a plan view and is configured to be extendable and contractible. The provision of the extension portion 23 allows the end (tip) 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 other end (not shown) of the conductive path is disposed at the tip of the extension portion 23. The other end of the conductive path is electrically connected to the bus bar 30 via the metal piece 15. Although not shown, a fuse or the like may be provided in the conductive path of the first circuit board 21.

[0022] The second circuit board 24 is, for example, a flexible board, and is configured by forming a conductive path on the surface of a flexible insulating sheet using printed wiring technology. The second circuit board 24 includes a board main body 25 and a temperature measuring element 26 mounted on a land of the board main body 25. The board main body 25 is generally T-shaped in plan view. Like the board main body 22 of the first circuit board 21, the board main body 25 is fixed to the mounting surface 54 of the protector 50, which will be described later. The board main body 25 is provided with an electric wire land 25A arranged at one end of the conductive path. The electric wire land 25A is connected to a temperature detection line 42, which will be described later, by soldering or the like. The temperature measuring element 26 can be, for example, a thermistor or a platinum resistance thermometer.

[0023] [Electric wire] The multiple electric wires 40 of this embodiment include multiple voltage detection wires 41 and multiple temperature detection wires 42. The voltage detection wire 41 is connected to the first circuit board 21. The temperature detection wire 42 is connected to the second circuit board 24. Because the voltage detection wire 41 and the temperature detection wire 42 have the same configuration, the overlapping configurations will be described using the voltage detection wire 41 as a representative. The voltage detection wire 41 has a well-known configuration in which a core wire made of multiple strands twisted together is covered with an insulating coating.

[0024] [Main line] The plurality of electric wires 40 are bundled together to form a trunk line 43. Specifically, the plurality of electric wires 40 can be bundled by wrapping them with tape or storing them in a corrugated tube. The trunk line 43 is housed in an electric wire housing section 52 and a trunk line housing section 57 (see FIG. 2 ) of a protector 50, which will be described later. One end (front end) of the trunk line 43 is connected to a connector 60, which will be described later. The plurality of electric wires 40 are led out from the other end (rear end) of the trunk line 43. The other end of the trunk line 43 is fixed to the protector 50 by a fixing section 44. The fixing section 44 is formed of, for example, a cable tie, and is fixed to the protector 50 by being wrapped around the trunk line 43.

[0025] [Superimposed electric wire] The plurality of electric wires 40 includes at least one overlapping electric wire that is arranged overlapping with the main wire 43 when viewed from above and below. The overlapping electric wire according to this embodiment is, for example, two temperature detection wires 42 arranged at the front end portion of the wiring module 20. In this embodiment, the main wire 43 also includes an overlapping electric wire.

[0026] The electric wires 40 are connected to a connector 60 at the end opposite the circuit board CB. This connector 60 is adapted to fit into a mating connector provided in an external ECU (Electronic Control Unit) or the like. The ECU is equipped with a microcomputer, elements, etc., and has a well-known configuration that has functions such as detecting the voltage, current, temperature, etc. of each storage element 11 and controlling the charging and discharging of each storage element 11.

[0027] 2 and 3, a connector accommodating portion 55 for accommodating the connector 60 is provided at the front end of the protector 50. The connector accommodating portion 55 is a space formed by cutting out a part of the protector 50. The front end of the connector accommodating portion 55 is flush with the front end of the protector 50. When the connector 60 is accommodated in the connector accommodating portion 55, the front end of the connector 60 does not protrude forward from the front end of the protector 50.

[0028] [Protector] The protector 50 is made of insulating synthetic resin and includes a protector body 50A and a cover 50B that covers the protector body 50A from above.

[0029] [Protector body] The protector body 50A is tray-shaped. As shown in Fig. 4, the protector body 50A includes a busbar accommodating section 51 that accommodates the busbar 30, an electric wire accommodating section 52 that accommodates the plurality of electric wires 40, and an intermediate wiring section 53 that is arranged between the busbar accommodating section 51 and the electric wire accommodating section 52. The busbar accommodating sections 51 are provided at both left-right end sections of the protector body 50A. The busbar accommodating sections 51 are frame-shaped and are arranged side by side in the front-rear direction. The intermediate wiring section 53 has a mounting surface 54 on which the circuit board CB is placed. The mounting surface 54 is a surface that is perpendicular to the up-down direction (an example of a first direction).

[0030] [Wire housing section] Two electric wire accommodating sections 52 are provided near the left-right center of the protector main body 50A. The electric wire accommodating sections 52 are groove-shaped and extend in the front-rear direction. The electric wire accommodating section 52 includes a bottom wall 52A and a pair of side walls 52B rising upward from both left and right end edges of the bottom wall 52A. A plurality of notches 52C are formed in the side wall 52B of the electric wire accommodating section 52 on the intermediate wiring section 53 side. A plurality of electric wires 40 are accommodated in the electric wire accommodating section 52. The electric wires 40 can be inserted between the intermediate wiring section 53 and the electric wire accommodating section 52 through the notches 52C.

[0031] A portion of the side wall 52B on the intermediate wiring section 53 side is formed as a curved wall 52D that is curved toward the intermediate wiring section 53. The curved wall 52D is disposed in an area of ​​the electric wire accommodating section 52 where the main wire 43 is accommodated. The provision of the curved wall 52D increases the width (left-right spacing) of the electric wire accommodating section 52. By accommodating the main wire 43 in the electric wire accommodating section 52 in a state where it is curved toward the curved wall 52D (hereinafter referred to as a contracted state), the entire main wire 43 can be positioned on the protector 50 (see FIG. 2). In the contracted state, the connector 60 is accommodated in the connector accommodating section 55.

[0032] On the other hand, as shown in Fig. 5, in a state where the main wire 43 extends in the front-rear direction in the region where the curved wall 52D is provided (hereinafter referred to as the extended state), the front portion of the main wire 43 is arranged to protrude from the protector 50. In the extended state, the connector 60 and the front portion of the main wire 43 protrude forward from the protector 50 and can move freely, so that the connector 60 can be mated with the mating connector (see Fig. 3). In addition, because the main wire 43 is fixed by the fixing portion 44, when the main wire 43 is pulled forward, the tensile stress is not transmitted to the electric wires 40 arranged behind the fixing portion 44.

[0033] 4 and 5, portions of the overlapping electric wires (two temperature detection wires 42) that are closer to the second circuit board 24 are disposed near the front end of the electric wire accommodating section 52. In detail, the overlapping electric wires are introduced from the intermediate routing section 53 into the electric wire accommodating section 52 through a notch 52C disposed close to the second circuit board 24, are routed extending rearward within the electric wire accommodating section 52, and are then led from the electric wire accommodating section 52 to the intermediate routing section 53 through a notch 52C provided immediately before the curved wall 52D. This configuration avoids interference between the two temperature detection wires 42 and the first circuit board 21 disposed immediately after the second circuit board 24, and allows the two temperature detection wires 42 to be routed in a space-saving manner on the protector 50.

[0034] [Cover, top panel, main line storage section] As shown in Figures 2 and 3, the cover 50B is configured to be able to close the wire accommodating portion 52 and the intermediate wiring portion 53 (see Figures 4 and 5) of the protector body 50A from above. As shown in Figure 7, the cover 50B includes a first cover 50C and a second cover 50D. The first cover 50C includes a top plate portion 56 and a main cable accommodating portion 57 recessed from the top plate portion 56. The main cable accommodating portion 57 is provided over the entire front-to-rear direction of the first cover 50C and is open in the front-to-rear direction. As shown in Figure 6, the top plate portion 56 is disposed opposite the mounting surface 54 in the vertical direction. The main cable accommodating portion 57 is configured to be disposed within the wire accommodating portion 52.

[0035] As shown in Fig. 7, the second cover 50D is plate-shaped. The second cover 50D is formed to have approximately the same thickness as the top plate portion 56 of the first cover 50C. As shown in Figs. 2 and 3, when the cover 50B is attached to the protector body 50A, the second cover 50D and the top plate portion 56 of the first cover 50C are arranged approximately continuous in the front-to-rear direction. The first cover 50C and the second cover 50D can be attached to the protector body 50A separately.

[0036] As shown in Figures 2 to 5, the first cover 50C is configured to close the electric wire accommodating section 52 and the intermediate wiring section 53 arranged at the front end of the left side of the protector body 50A. The second cover 50D is configured to close the electric wire accommodating section 52 and the intermediate wiring section 53 that are not closed by the first cover 50C. The main wire accommodating section 57 accommodates the front portion of the main wire 43. As shown in Figure 6, the overlapping electric wires (two temperature detection wires 42) are accommodated in the electric wire accommodating section 52 arranged below the main wire accommodating section 57. In other words, the main wire 43 and the overlapping electric wires are separated by the main wire accommodating section 57.

[0037] [About assembling the wiring module] The configuration of the wiring module 20 of this embodiment has been described above. An example of an assembly process for the wiring module 20 will now be described.

[0038] First, the electric wires 40, small metal pieces 15, temperature measuring elements 26, etc. are soldered to each circuit board CB. The bus bars 30, circuit boards CB, and electric wires 40 are arranged in the protector body 50A. The bus bars 30 are accommodated in the bus bar accommodating sections 51. The circuit boards CB are arranged in the intermediate routing sections 53. The bus bars 30 and the small metal pieces 15 are connected by welding. The electric wires 40 are routed in the intermediate routing sections 53 and the electric wire accommodating sections 52. During the routing of the electric wires 40, the trunk lines 43 are formed by wrapping tape or the like.

[0039] Next, the first cover 50C is attached to the protector body 50A. The overlapping electric wires (two temperature detection wires 42) are arranged so as to be sandwiched between the main wire housing portion 57 and the electric wire housing portion 52 (see FIG. 6). At this time, the front portion of the main wire 43 is arranged outside the electric wire housing portion 52. After the first cover 50C is attached to the protector body 50A, the front portion of the main wire 43 is housed in the main wire housing portion 57. The main wire 43 arranged behind the main wire housing portion 57 is housed in the electric wire housing portion 52.

[0040] Finally, the second cover 50D is attached to the protector body 50A so as to close the electric wire accommodating portion 52 and the intermediate wiring portion 53. With the above, the assembly process of the wiring module 20 is completed.

[0041] [Effects of the trunk line storage area] In this embodiment, the overlapping electric wires (two temperature detection wires 42) and the trunk wire 43 are arranged so as to partially overlap each other in the vertical direction. If the trunk wire housing 57 were not provided, the overlapping electric wires and the trunk wire 43 would be arranged in the electric wire housing 52, and friction between them would be generated. Since the wiring module 20 is applied to the vehicle 1, the multiple electric wires 40 are likely to be subjected to vibration. In particular, vibrations may be large in the trunk wire 43, which integrates the multiple electric wires 40, and the vibrations of the trunk wire 43 may be transmitted to the overlapping electric wires. Furthermore, the trunk wire 43 is connected to the connector 60. When the connector 60 is connected to a mating connector, friction between the trunk wire 43 and the overlapping electric wires is expected to apply tensile stress to the overlapping electric wires. Therefore, a load is applied to the connection between the overlapping electric wires and the second circuit board 24, which may damage the connection.

[0042] In this embodiment, the trunk line accommodating section 57 separates the trunk line 43 and the overlapped electric wires so that they do not come into contact with each other (see FIG. 6). This prevents friction from occurring between the trunk line 43 and the overlapped electric wires. This prevents damage to the connection between the overlapped electric wires and the second circuit board 24 due to vibration of the trunk line 43 in an in-vehicle environment or tensile stress on the trunk line 43 caused by fitting the connector 60, etc.

[0043] [Effects of the embodiment] According to the embodiment, the following actions and effects are achieved. The wiring module 20 according to the embodiment is a wiring module 20 that is attached to a plurality of energy storage elements 11, and includes a plurality of circuit boards CB, a plurality of electric wires 40, and a protector 50 that holds the plurality of circuit boards CB and the plurality of electric wires 40. The electric wires 40 are connected to the circuit boards CB, and at least some of the plurality of electric wires 40 are bundled together to form a main wire 43. The protector 50 includes a mounting surface 54 on which the circuit board CB is placed, an electric wire accommodating section 52 that accommodates the plurality of electric wires 40, and a main wire accommodating section 57 that is overlapped on the electric wire accommodating section 52 in a first direction (vertical direction) perpendicular to the mounting surface 54 and accommodates at least some of the main wires 43. The plurality of electric wires 40 include at least one overlapping electric wire (two temperature detection wires 42) that is arranged overlapping with the main wire 43 when viewed from the first direction, and the main wire accommodating section 57 separates the main wire 43 from the at least one overlapping electric wire.

[0044] With this configuration, the trunk line accommodating portion 57 separates the trunk line 43 from the superimposed electric wires, so that friction does not occur between the trunk line 43 and the superimposed electric wires. Therefore, damage to the connection portion between the superimposed electric wires and the circuit board CB (second circuit board 24) can be suppressed.

[0045] Furthermore, since the superposed electric wires are arranged so as to overlap with the trunk line 43 when viewed from the first direction, it is possible to reduce the area in which the superposed electric wires and the trunk line 43 are routed in the direction parallel to the mounting surface 54. This allows the wiring module 20 to be made smaller.

[0046] In the embodiment, the protector 50 comprises a protector main body 50A and a cover 50B that is stacked on the protector main body 50A in a first direction, the protector main body 50A having a mounting surface 54 and an electric wire accommodating section 52, and the cover 50B having a top plate section 56 that faces the mounting surface 54 in the first direction and a main wire accommodating section 57 that is recessed from the top plate section 56.

[0047] This configuration allows for a simple configuration of the main line housing portion 57. Furthermore, the placement surface 54 can be covered by the top plate portion 56.

[0048] <Other embodiments> (1) In the above embodiment, the main line 43 is made up of a plurality of electric wires 40. However, this is not limited to this, and the main line may be made up of a portion of the plurality of electric wires. (2) In the above embodiment, the superposed electric wire is the temperature detection wire 42, but this is not limitative. The superposed electric wire may be an electric wire different from the temperature detection wire, for example, a voltage detection wire. (3) In the above embodiment, the superposed electric wires are included in the trunk line 43, but this is not limitative, and the superposed electric wires do not have to be included in the trunk line.

[0049] (4) In the above embodiment, the protector body 50A and the cover 50B are provided as separate bodies, but this is not limited to this. The protector body and the cover may be connected by a hinge, for example, and provided as a single body. (5) In the above embodiment, the curved wall 52D was formed so that the main line 43 could be accommodated in a curved state in the electric wire accommodating section 52, but this is not limited to this, and the curved wall does not have to be formed. (6) In the above embodiment, the first circuit board 21 and the second circuit board 24 are flexible boards, but this is not limitative, and at least one of the first circuit board and the second circuit board may be a rigid board. [Explanation of symbols]

[0050] 1: Vehicle 2: Energy storage pack 3: PCU 4: Wire harness 10: Energy storage module 11: Energy storage element 15: Small metal piece 20: Wiring module 21: 1st circuit board 22: Board body 22A: Electric wire land 23: Extension part 24: 2nd circuit board 25: Board body 25A: Wire land 26: Temperature measuring element 30: Busbar 30A: Connection busbar 30B: Output busbar 40: Electric wire 41: Voltage detection wire 42: Temperature detection wire (superimposed wire) 43: Main line 44: Fixed part 50: Protector 50A: Protector body 50B: Cover 50C: First cover 50D: Second cover 51: Busbar housing 52: Wire storage section 52A: Bottom wall 52B: Side wall 52C: Cutout 52D: Curved Wall 53: Intermediate wiring section 54: Placement surface 55: Connector housing 56: Top plate 57: Main line housing 60: Connector CB: Circuit board

Claims

1. A wiring module attached to a plurality of energy storage elements, a plurality of circuit boards; A plurality of wires; a protector that holds the plurality of circuit boards and the plurality of electric wires, the electric wire is connected to the circuit board; At least some of the plurality of electric wires are bundled together to form a trunk line, the protector includes a mounting surface on which the circuit board is mounted, an electric wire accommodating portion in which the plurality of electric wires are accommodated, and a main wire accommodating portion that is overlapped with the electric wire accommodating portion in a first direction perpendicular to the mounting surface and that accommodates at least a portion of the main wire, the plurality of electric wires includes at least one overlapping electric wire arranged to overlap the trunk line when viewed from the first direction, The main line accommodating section separates the main line and the at least one overlapped electric wire.

2. the protector includes a protector body and a cover that is overlapped on the protector body in the first direction, the protector body includes the mounting surface and the wire accommodating portion, The wiring module according to claim 1 , wherein the cover includes a top plate portion facing the placement surface in the first direction, and the trunk cable accommodating portion recessed from the top plate portion.

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