Wiring Module

Abstract

To provide a wiring module whose height can be easily reduced.SOLUTION: A wiring module is a wiring module to be attached to a plurality of power storage elements with electrode terminals, and includes a bus bar 30 and a protector including a bus bar accommodation part 41 that accommodates the bus bar 30. The bus bar 30 includes an electrode connection part 31 connected to the electrode terminal, and a flexible part 32 disposed between the electrode connection parts 31 adjacent in a first direction and being capable of elastic deformation. The bus bar accommodation part 41 includes a bottom wall 43 disposed between a power storage element 11 and the bus bar 30 in a second direction, which is orthogonal to the first direction, and a pressing wall 44 disposed on at least one end part in the first direction of the bus bar accommodation part 41, and disposed facing the electrode connection part 31 from the side opposite to the bottom wall 43 in the second direction. The bottom wall 43 and the pressing wall 44 form an insertion port 45 to which an end part of the bus bar 30 in the first direction can be inserted.SELECTED DRAWING: Figure 11

Description

[Technical Field]

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

[0002] JP 2019-207825 A (Patent Document 1) discloses a conventional wiring module disposed in an energy storage element group in which a plurality of energy storage elements having electrode terminals are arranged. This wiring module includes a connection bus bar connected to the electrode terminal and an insulating protector having a connection bus bar accommodating portion that accommodates the connection bus bar. The connection bus bar accommodating portion has a plurality of peripheral walls disposed around the connection bus bar. The plurality of peripheral walls includes a pair of opposing walls that face each other. A locking portion that locks to the connection bus bar is provided on an inner surface of at least one of the pair of opposing walls. The locking portion is formed so as to extend downward from an upper end connected to the opposing wall as a base end. The lower end of the locking portion is a free end that resiliently abuts against the connection bus bar from above. This prevents the connection bus bar from being dislodged upward from the connection bus bar accommodating portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-207825 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above configuration, the length of the locking portion in the vertical direction must be long enough to allow elastic deformation of the locking portion. Therefore, providing the locking portion may increase the height of the connection bus bar accommodating portion. This may make it difficult to reduce the height of the wiring module. [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 having electrode terminals, and includes: a busbar; and a protector including a busbar accommodating portion that accommodates the busbar. The busbar includes electrode connection portions connected to the electrode terminals and flexible portions that are arranged between the electrode connection portions adjacent to each other in a first direction and are elastically deformable. The busbar accommodating portion includes a bottom wall that is arranged between the busbar and the energy storage elements in a second direction perpendicular to the first direction, and a pressing wall that is arranged at at least one end of the busbar accommodating portion in the first direction and faces the electrode connection portion from the opposite side to the bottom wall in the second direction. The bottom wall and the pressing wall form an insertion port into which the end of the busbar in the first direction can be inserted. [Effects of the Invention]

[0006] According to the present disclosure, it is possible to provide a wiring module that can be easily made low-profile. [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 wiring module and the energy storage element. [Figure 3] FIG. 3 is a side view of the bus bar. [Figure 4] FIG. 4 is a perspective view of the bus bar. [Figure 5] FIG. 5 is a perspective view of the bus bar in a state where the flexible portion is elastically deformed. [Figure 6] FIG. 6 is a perspective view of the bus bar receiving portion. [Figure 7] FIG. 7 is a perspective view of the bus bar receiving portion in which the bus bar is received. [Figure 8] FIG. 8 is a plan view of the busbar receiving portion in which the busbar is received. [Figure 9] FIG. 9 is a cross-sectional view taken along line AA in FIG. [Figure 10]FIG. 10 is a perspective view showing how the bus bar is accommodated in the bus bar accommodating portion. [Figure 11] FIG. 11 is a cross-sectional view taken along the line AA in FIG. 8, showing how the bus bar is accommodated in the bus bar accommodating portion. 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 according to the present disclosure is a wiring module attached to a plurality of energy storage elements having electrode terminals, the wiring module comprising: a busbar; and a protector having a busbar accommodating portion that accommodates the busbar. The busbar comprises electrode connection portions connected to the electrode terminals and flexible portions that are arranged between the electrode connection portions adjacent to each other in a first direction and are elastically deformable. The busbar accommodating portion comprises a bottom wall that is arranged between the busbar and the energy storage elements in a second direction perpendicular to the first direction, and a retaining wall that is arranged at least one end of the busbar accommodating portion in the first direction and faces the electrode connection portion from the opposite side to the bottom wall in the second direction. The bottom wall and the retaining wall form an insertion port into which the end of the busbar in the first direction can be inserted.

[0010] With this configuration, the busbar can be accommodated in the busbar accommodating section by inserting the end of the busbar in the first direction into the insertion opening while the flexible portion of the busbar is elastically deformed and then allowing the flexible portion to return to its original shape. The retaining wall is disposed opposite the bottom wall in the second direction and facing the electrode connection portion, preventing the busbar from slipping out of the busbar accommodating section in the second direction. The retaining wall can be formed flat in the second direction, making it easy to reduce the height of the busbar accommodating section, and ultimately the wiring module, in the second direction.

[0011] (2) The retaining walls are preferably disposed at both ends of the busbar accommodating portion in the first direction.

[0012] With this configuration, the bus bar can be more easily prevented from coming out by the bus bar receiving portion.

[0013] (3) It is preferable that the busbar accommodating portion has a through hole penetrating the bottom wall in the second direction, and the retaining wall is arranged in a position overlapping the through hole when viewed from the second direction.

[0014] This configuration makes it easier to insert the end of the busbar in the first direction into the insertion port. Furthermore, by providing the through-hole, the busbar accommodating portion having the retaining wall can be formed using a mold whose removal direction is the second direction, without using a slide mold. Therefore, compared to a configuration without a through-hole, forming the busbar accommodating portion is easier.

[0015] (4) Preferably, the bus bar accommodating portion includes an abutment wall disposed opposite an end of the bus bar in the first direction.

[0016] With this configuration, when the end of the bus bar in the first direction is inserted into the socket, the abutment wall abuts against the end of the bus bar in the first direction, thereby preventing the end of the bus bar in the first direction from being inserted excessively into the socket.

[0017] (5) The flexible portion is preferably formed by laminating a plurality of metal foils.

[0018] With this configuration, the flexible portion can be easily configured.

[0019] [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 claims, and is intended to include all modifications within the meaning and scope of the claims.

[0020] <Embodiment> An embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 11. 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.

[0021] 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 including 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. In this embodiment, the front-to-rear direction is an example of a first direction, and the up-down direction is an example of a second direction.

[0022] 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. The energy storage elements 11 are flattened rectangular parallelepipeds that house energy storage elements (not shown) inside. The energy storage elements 11 have positive and negative electrode terminals 12A, 12B on their upper surfaces.

[0023] [Wiring module] The wiring module 20 includes a bus bar 30 connected to the energy storage elements 11, a flexible substrate 21 connected to the bus bar 30, and a protector 40 that holds the bus bar 30 and the flexible substrate 21. The energy storage module 10 is configured with a wiring module 20 connected to electrode terminals 12A, 12B arranged on the right side of the multiple energy storage elements 11, and a wiring module 20 connected to electrode terminals 12A, 12B arranged on the left side of the multiple energy storage elements 11, and both have the same configuration. Below, the configuration of each component in the bus bar accommodating portion 41 will be described based on the arrangement of each component in the wiring module 20 connected to electrode terminals 12A, 12B arranged on the left side of the multiple energy storage elements 11.

[0024] [Flexible PCB] The flexible substrate 21 has an overall elongated rectangular shape extending in the front-to-rear direction. The flexible substrate 21 is configured by forming a plurality of voltage detection lines (not shown) on the surface of a flexible insulating sheet using printed wiring technology. The flexible substrate 21 includes a substrate main body 22, an extension portion 23 extending from the substrate main body 22, and a substrate-side connection portion 24 disposed at an end of the extension portion 23.

[0025] The board main body 22 is fixed to a board accommodating portion 46 of the protector 40, 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 a bottom wall 48 of the board accommodating portion 46 is inserted. The extension portion 23 is formed long in the front-to-rear direction. A notch is provided in the extension portion 23, making it expandable and contractible. The extension portion 23 allows the board-side connection portion 24 to be displaced a predetermined dimension relative to the board main body 22. The board-side connection portion 24 is a portion that is connected to the small metal piece 15, and one end of a voltage detection wire (not shown) is disposed thereon.

[0026] The flexible substrate 21 is connected at its front-rear end to a connector for the flexible substrate (not shown). A terminal is housed inside the connector. This terminal is electrically connected to the other end (not shown) of the voltage detection line of the flexible substrate 21.

[0027] The connector is adapted to be connected to an external ECU (Electronic Control Unit), etc. The ECU is equipped with a microcomputer, elements, etc., and has a well-known configuration that has functions for detecting the voltage, current, temperature, etc. of each storage element 11, and for controlling the charging and discharging of each storage element 11, etc.

[0028] [Busbar, electrode connection] Bus bar 30 connects electrode terminals 12A, 12B of two adjacent energy storage elements 11 in the front-to-rear direction. As shown in Fig. 4, bus bar 30 includes two electrode connection portions 31 and a flexible portion 32 disposed between electrode connection portions 31.

[0029] [Electrode connection part] The electrode connection portion 31 is made of a single metal plate and has rigidity. The electrode connection portion 31 is provided with a through-hole 31A that passes through the metal plate constituting the electrode connection portion 31 in the vertical direction. The through-hole 31A can be used, for example, to check whether the electrode connection portion 31 is in proper contact with the electrode terminals 12A and 12B. In another embodiment, the electrode terminals 12A and 12B may be provided with protrusions, and the electrode terminals 12A and 12B may be positioned relative to the electrode connection portion 31 by inserting the protrusions into the through-hole 31A. The electrode connection portion 31 and the electrode terminals 12A and 12B are connected by welding or the like. Alternatively, the electrode connection portion 31 and the electrode terminals 12A and 12B may be connected by bolting or the like.

[0030] As shown in FIG. 3, the electrode connection part 31 includes a main body part 31B and a flexible part connection part 31C arranged at the end of the electrode connection part 31 on the flexible part 32 side. The flexible part connection part 31C is connected to the main body part 31B via a step. The flexible part connection part 31C is approximately parallel to the main body part 31B and arranged higher than the main body part 31B. The flexible part connection part 31C is placed above the base part 32A of the flexible part 32 and is connected to the base part 32A. The connection between the flexible part connection part 31C and the base part 32A is performed by, for example, welding or the like.

[0031] 4, a pair of engaging recesses 31D are formed in the main body 31B by recessing the left and right end edges of the main body 31B. The engaging recesses 31D are adapted to engage with engaging protrusions 42C of the busbar accommodating portion 41, which will be described later.

[0032] [Flexible part] The flexible portion 32 is formed by laminating multiple metal foils. As shown in FIG. 3, the flexible portion 32 includes a base portion 32A and a protruding portion 32B that protrudes upward from the base portion 32A and forms a generally inverted U shape in a side view. The base portion 32A is disposed on both the front and rear sides of the protruding portion 32B and is overlapped below the flexible portion connection portion 31C of the electrode connection portion 31. The flexible portion 32 is flexible and capable of elastic deformation. As shown in FIG. 4, the flexible portion 32 is provided with multiple (three in this embodiment) slits 32C that penetrate the protruding portion 32B. Each slit 32C extends in the front-rear direction. The provision of multiple slits 32C allows the flexible portion 32 to easily deform in the left-right direction. The provision of the flexible portion 32 makes it possible to accommodate manufacturing tolerances, assembly tolerances, etc. of the bus bar 30, the protector 40, and the electrode terminals 12A and 12B. Furthermore, when these members expand or contract due to temperature changes, it becomes easier to tolerate the dimensional changes caused by the respective expansion and contraction.

[0033] When the flexible portion 32 is in its natural state, the two main body portions 31B of the busbar 30 are arranged substantially parallel to one another, as shown in Figures 3 and 4. Furthermore, by elastically deforming the flexible portion 32, the two main body portions 31B can be arranged to intersect with one another, as shown in Figure 5. In other words, the busbar 30 can be bent so that the two main body portions 31B approach each other, with the flexible portion 32 as the approximate center.

[0034] 3, in this embodiment, the protruding portion 32B protrudes upward from the base portion 32A, and the flexible portion connecting portion 31C is disposed above the base portion 32A. This configuration makes it easy to reduce the vertical dimension of the bus bar 30. This makes it easy to reduce the height of the wiring module 20.

[0035] 2, electrode terminals 12A, 12B at the front or rear ends of multiple energy storage elements 11 are connected to an external device by end bus bar 33. Unlike bus bar 30 described above, end bus bar 33 does not have flexible portion 32 and is made of a single metal plate. End bus bar 33 is fixed to the end of protector 40 in the front-rear direction.

[0036] [Protector] Protector 40 is made of insulating synthetic resin and includes busbar accommodating portions 41 that accommodate busbars 30 and substrate accommodating portions 46 that accommodate flexible substrates 21. Busbar accommodating portions 41 are frame-shaped and are arranged side by side in the front-to-rear direction.

[0037] [Busbar housing] 6 to 11, the configuration of each component of the busbar accommodating portion 41 will be described based on the arrangement of each component in the wiring module 20 disposed on the left side of the plurality of energy storage elements 11. As shown in Fig. 6, the busbar accommodating portion 41 includes a peripheral wall 42, a bottom wall 43 extending horizontally from the lower end of the peripheral wall 42 toward the inside of the peripheral wall 42, and a retaining wall 44 extending in the front-rear direction from upper portions of both ends of the peripheral wall 42 in the front-rear direction toward the inside of the busbar accommodating portion 41.

[0038] [Bottom wall, through hole] As shown in FIG. 9 , bottom wall 43 faces the lower surface of busbar 30. Busbar accommodating section 41 has connection holes 43A that penetrate bottom wall 43 in the up-down direction. Connection holes 43A are arranged in a position that occupies most of the central portion of busbar accommodating section 41. Electrode connection portions 31 of busbar 30 arranged in busbar accommodating section 41 and electrode terminals 12A, 12B of energy storage element 11 are connected via connection holes 43A. Both ends of busbar accommodating section 41 in the front-rear direction are provided with through holes 43B that penetrate bottom wall 43 in the up-down direction.

[0039] [Abutting wall] The peripheral wall 42 includes abutment walls 42A disposed on the edge of the through-hole 43B. The abutment walls 42A are disposed at both ends in the front-rear direction of the busbar accommodating portion 41. The lower surfaces of the abutment walls 42A and the lower surface of the bottom wall 43 are disposed at the same height position.

[0040] 6, notches 42B are provided in a portion extending in the front-rear direction of peripheral wall 42. Notches 42B are arranged at positions near the front end and rear end of peripheral wall 42, which is arranged on the right side of busbar accommodating portion 41.

[0041] The busbar accommodating portion 41 has engaging protrusions 42C that protrude inward from the peripheral wall 42 of the busbar accommodating portion 41. In this embodiment, the engaging protrusions 42C protrude from both the left and right peripheral walls 42. When the busbar 30 is placed in the busbar accommodating portion 41, the engaging protrusions 42C engage with the engaging recesses 31D, as shown in FIGS. 7 and 8. This positions the busbar 30 in the front-rear direction within the busbar accommodating portion 41.

[0042] [Retaining wall, socket] As shown in Fig. 9, the retaining wall 44 is disposed at a vertical distance from the bottom wall 43. The vertical distance between the retaining wall 44 and the bottom wall 43 is set to be slightly larger than the thickness (vertical dimension) of the electrode connection portion 31. The retaining wall 44 and the bottom wall 43 form an insertion port 45 that opens in the front-to-rear direction. The insertion port 45 is disposed at a position near the front end or rear end of the busbar accommodating portion 41. As will be described later, the insertion port 45 is an opening into which the front end or rear end of the busbar 30 is inserted.

[0043] The distance in the front-rear direction between the two retaining walls 44 arranged at the front and rear ends of the busbar accommodating portion 41 is smaller than the dimension in the front-rear direction of the busbar 30 in its natural state. When the busbar 30 is arranged in the busbar accommodating portion 41, the retaining wall 44 is arranged above the electrode connection portion 31. This prevents the busbar 30 from slipping out of the busbar accommodating portion 41.

[0044] The pressing wall 44 is disposed at a position overlapping the through hole 43B when viewed from the top-bottom direction. With this configuration, the pressing wall 44 can be easily formed by removing the mold in the top-bottom direction.

[0045] 2, board accommodating portion 46 extends in the front-rear direction and is formed in a groove shape. Board accommodating portion 46 includes a pair of left and right side walls 47 and a bottom wall 48 connecting the lower ends of the pair of side walls 47. Of the pair of side walls 47, the side wall 47 closer to busbar accommodating portion 41 has a notch 47A formed in a position corresponding to notch 42B of busbar accommodating portion 41.

[0046] The cutouts 42B and 47A are configured to accommodate metal pieces 15 for electrically connecting the bus bar 30 to the voltage detection line of the flexible substrate 21. One end of the metal piece 15 is electrically connected to the substrate-side connection portion 24, and the other end of the metal piece 15 is electrically connected to the bus bar 30. The connection between the metal piece 15 and the substrate-side connection portion 24 is made by, for example, soldering. The connection between the metal piece 15 and the bus bar 30 is made by, for example, welding.

[0047] [Installing the busbar in the busbar housing] The procedure for accommodating busbar 30 in busbar accommodating portion 41 will be described below. First, as shown in Fig. 5, flexible portion 32 of busbar 30 is elastically deformed, and busbar 30 is bent at flexible portion 32. This results in an arrangement in which two main body portions 31B intersect. Furthermore, the length of busbar 30 in the front-to-rear direction becomes shorter than when busbar 30 is in its natural state.

[0048] 10 and 11 , the front and rear edges of the elastically deformed busbar 30 are inserted below the retaining walls 44 at the front and rear ends of the busbar accommodating section 41, respectively, and then inserted into the insertion opening 45. Here, as shown in FIG. 11 , the retaining walls 44 are positioned to overlap the through-holes 43B in a plan view, so that the front and rear edges of the busbar 30 inserted into the insertion opening 45 can enter the through-holes 43B without interfering with the bottom wall 43. This makes it easy to insert the front and rear edges of the busbar 30 into the insertion opening 45. Furthermore, the peripheral wall 42 of the busbar accommodating section 41 is provided with abutment walls 42A at both front and rear ends. Therefore, the front and rear edges of the busbar 30 inserted into the insertion opening 45 abut against the abutment walls 42A, preventing the busbar 30 from being positioned forward of the front end or rearward of the rear end of the busbar accommodating section 41.

[0049] With the front and rear edges of the elastically deformed busbar 30 inserted into the insertion openings 45 at both the front and rear ends of the busbar accommodating section 41, the flexible section 32 is elastically restored. This returns the busbar 30 to its natural state (see FIG. 9 ). The two main body sections 31B are arranged substantially parallel to each other, and the length of the busbar 30 in the front-to-rear direction is greater than when elastically deformed. The bottom wall 43 is arranged so as to be able to abut against the underside of the busbar 30 from below. The retaining wall 44 is arranged so as to be able to abut against the front or rear end of the busbar 30 from above. This prevents the busbar 30 from coming out of the busbar accommodating section 41.

[0050] When the busbar 30 is elastically restored, the engaging protrusions 42C are engaged with the inner walls of the engaging recesses 31D (see FIGS. 7 and 10). The engagement between the inner walls of the engaging recesses 31D and the engaging protrusions 42C enables the busbar 30 to be positioned in the front-rear direction within the busbar accommodating portion 41. In this way, the accommodation of bus bar 30 in bus bar accommodation portion 41 is completed.

[0051] [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 having electrode terminals 12A, 12B, and includes a busbar 30 and a protector 40 that includes a busbar accommodating portion 41 that accommodates the busbar 30. The busbar 30 includes an electrode connection portion 31 connected to the electrode terminals 12A, 12B and a flexible portion 32 that is arranged between adjacent electrode connection portions 31 in a first direction (front-to-back direction) and is elastically deformable. The busbar accommodating portion 41 includes a bottom wall 43 that is arranged between the busbar 30 and the energy storage element 11 in a second direction (up-down direction) that is perpendicular to the first direction, and a pressing wall 44 that is arranged at at least one end of the busbar accommodating portion 41 in the first direction and faces the electrode connection portion 31 from the side opposite the bottom wall 43 in the second direction. The bottom wall 43 and the pressing wall 44 form an insertion port 45 into which the end of the busbar 30 in the first direction can be inserted.

[0052] With this configuration, with flexible portion 32 of busbar 30 elastically deformed, the end portion in the first direction of busbar 30 is inserted into insertion opening 45, and flexible portion 32 is returned to its original deformation, thereby accommodating busbar 30 in busbar accommodating portion 41. Since retaining wall 44 is disposed opposite bottom wall 43 in the second direction and facing electrode connection portion 31, busbar 30 can be prevented from slipping out of busbar accommodating portion 41 in the second direction. Since retaining wall 44 can be formed flat in the second direction, it is easy to reduce the height of busbar accommodating portion 41, and ultimately wiring module 20, in the second direction.

[0053] In the embodiment, the retaining walls 44 are disposed at both ends of the busbar accommodating portion 41 in the first direction.

[0054] With this configuration, bus bar 30 can be more easily prevented from coming out by bus bar accommodating portion 41.

[0055] In the embodiment, busbar accommodating portion 41 is provided with through-hole 43B penetrating bottom wall 43 in the second direction, and pressing wall 44 is disposed at a position overlapping through-hole 43B when viewed from the second direction.

[0056] This configuration makes it easier to insert the end of busbar 30 in the first direction into insertion port 45. Furthermore, by providing through hole 43B, busbar accommodating portion 41 having retaining wall 44 can be formed by a mold whose removal direction is the second direction, without using a slide mold. Therefore, busbar accommodating portion 41 is easier to form than a configuration without through hole 43B.

[0057] In the embodiment, the busbar accommodating portion 41 includes a contact wall 42A that is disposed opposite the end of the busbar 30 in the first direction.

[0058] With this configuration, when the end portion of busbar 30 in the first direction is inserted into socket 45, abutment wall 42A abuts against the end portion of busbar 30 in the first direction. This prevents the end portion of busbar 30 in the first direction from being inserted excessively into socket 45.

[0059] In this embodiment, the flexible portion 32 is formed by laminating a plurality of metal foils.

[0060] With this configuration, the flexible portion 32 can be easily configured.

[0061] <Other embodiments> (1) In the above embodiment, the bus bar 30 is bent so that the two main body portions 31B intersect and is inserted at an angle into the socket 45. However, this is not limited to this. The bus bar may be elastically deformable in the front-to-rear direction while maintaining the two electrode connection portions parallel to each other, and may be inserted in the front-to-rear direction into the socket. (2) In the above embodiment, the busbar accommodating portion 41 has the retaining wall 44 at both ends in the front-to-rear direction, but this is not limited to this, and the retaining wall may be provided only at one end of the busbar accommodating portion in the front-to-rear direction.

[0062] (3) In the above embodiment, the electrode connection portion 31 and the flexible portion 32 are separate bodies, and the bus bar 30 is formed by connecting them. However, this is not limited to this, and the electrode connection portion and the flexible portion may be integrally formed from the same member. (4) In the above embodiment, the bus bar 30 includes two electrode connection portions 31 and one flexible portion 32, but this is not limited to this. For example, if the bus bar connects energy storage elements in parallel, the bus bar may include n electrode connection portions and (n-1) flexible portions, where n is an integer of 3 or greater. (5) In the above embodiment, the flexible portion 32 is formed by laminating multiple metal foils and has a slit 32C extending in the front-rear direction. However, the flexible portion may be configured to be elastically deformable, and the form is not limited thereto. For example, the flexible portion may not have a slit. The flexible portion may also be configured using an electric wire, a braided wire, or the like.

[0063] (6) In the above embodiment, the flexible substrate 21 is used as the voltage detection line, but this is not limited to this. For example, an electric wire may be used as the voltage detection line, or an electric wire and a flexible substrate may be used. (7) In the above embodiment, the bus bar 30 and the flexible substrate 21 are electrically connected via the metal piece 15, but this is not limited to this. The bus bar and the flexible substrate may be directly connected by welding, soldering, etc. [Explanation of symbols]

[0064] 1: Vehicle 2: Energy storage pack 3: PCU 4: Wire harness 10: Energy storage module 11: Energy storage element 12A,12B: Electrode terminal 15: Small metal piece 20: Wiring module 21: Flexible PCB 22: Board body 23: Extension part 24: Board side connection part 30: Busbar 31: Electrode connection part 31A: Through hole 31B: Main body 31C: Flexible part connection 31D: Engagement recess 32: Flexible part 32A: Base 32B: Protrusion 32C: Slit 33: End busbar 40: Protector 41: Busbar housing 42: Surrounding wall 42A: Abutment wall 42B: Notch 42C: Engagement protrusion 43: Bottom wall 43A: Connection hole 43B: Through hole 44: Retaining wall 45: Outlet 46: Circuit board housing 47: Side wall 47A: Cutout 48: Bottom wall

Claims

1. A wiring module attached to a plurality of energy storage elements having electrode terminals, A bus bar and a protector including a bus bar accommodating portion that accommodates the bus bar, the bus bar includes electrode connection portions connected to the electrode terminals, and flexible portions arranged between the electrode connection portions adjacent to each other in a first direction and elastically deformable; the busbar accommodating portion includes a bottom wall disposed between the busbar and the energy storage element in a second direction perpendicular to the first direction, and a pressing wall disposed at at least one end of the busbar accommodating portion in the first direction and facing the electrode connection portion from the side opposite to the bottom wall in the second direction, The bottom wall and the retaining wall form an insertion port into which an end of the bus bar in the first direction can be inserted.

2. The wiring module according to claim 1 , wherein the retaining walls are disposed at both ends of the bus bar accommodating portion in the first direction.

3. a through-hole penetrating the bottom wall in the second direction is provided in the bus bar accommodating portion; The wiring module according to claim 1 or 2, wherein the retaining wall is disposed at a position overlapping the through hole when viewed from the second direction.

4. 3 . The wiring module according to claim 1 , wherein the bus bar accommodating portion includes an abutment wall disposed opposite an end of the bus bar in the first direction.

5. The wiring module according to claim 1 or 2, wherein the flexible portion is formed by laminating a plurality of metal foils.

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