Wiring module

Abstract

A wiring module attached to a plurality of power storage elements having electrode terminals, the wiring module being provided with a bus bar (30) and a protector having a bus bar housing section (41) that houses the bus bar (30), the bus bar (30) being provided with electrode connection sections (31) that are connected to the electrode terminals, and flexible sections (32) that are arranged between the electrode connection sections (31) that are adjacent in a first direction and that are elastically deformable. The bus bar housing section (41) is provided with: a bottom wall (43) that is disposed between the bus bar (30) and the power storage element (11) in a second direction orthogonal to the first direction; and a pressing wall (44) that is disposed on at least one end of the bus bar housing section (41) in the first direction and that is disposed facing the electrode connection section (31) from the opposite side of the bottom wall (43) in the second direction. The bottom wall (43) and the pressing wall (44) constitute an insertion opening (45) into which the end of the bus bar (30) in the first direction can be inserted.

Description

Technical Field

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

[0002] Currently, as a wiring module disposed in a battery cell group formed by arranging a plurality of battery cells having electrode terminals, a wiring module described in Japanese Unexamined Patent Application Publication No. 2019-207825 (hereinafter referred to as Patent Document 1) is known. This wiring module includes a connection bus bar connected to the electrode terminals and an insulating protection member having a connection bus bar housing portion for housing the connection bus bar. The connection bus bar housing portion has a plurality of peripheral walls disposed around the connection bus bar. The plurality of peripheral walls include a pair of opposed walls facing each other. A locking portion for locking the connection bus bar is provided on at least one inner surface of the pair of opposed walls. The locking portion extends downward with the upper end connected to the opposed wall as a base end. The lower end portion of the locking portion is a free end and elastically abuts against the connection bus bar from above. Thereby, the detachment of the connection bus bar from the connection bus bar housing portion upward is suppressed. Prior Art Documents Patent Documents

[0003] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2019-207825 Summary of the Invention Problems to be Solved by the Invention

[0004] In the above structure, it is necessary to set the length of the locking portion in the vertical direction to a length that allows the locking portion to elastically deform. Therefore, it is considered that the height dimension of the connection bus bar housing portion is increased by providing the locking portion. Thus, there is a concern that it becomes difficult to make the wiring module thinner. Means for Solving the Problems

[0005] The wiring module of the present disclosure is mounted on a plurality of battery cells having electrode terminals, and the wiring module includes: a bus bar; and a protection member having a bus bar housing portion for housing the bus bar. The bus bar includes an electrode connection portion connected to the electrode terminals and a flexible portion disposed between the electrode connection portions adjacent in a first direction and capable of elastically deforming. The bus bar housing portion includes: a bottom wall disposed between the bus bar and the battery cell in a second direction orthogonal to the first direction; and a pressing wall disposed at at least one end portion of the bus bar housing portion in the first direction and disposed opposite to the electrode connection portion from a side opposite to the bottom wall in the second direction. The bottom wall and the pressing wall form an insertion port into which an end portion of the bus bar in the first direction can be inserted. Advantages of the Invention

[0006] According to the present disclosure, a wiring module that can be easily thinned can be provided. Brief Description of the Drawings

[0007] Figure 1 It is a schematic diagram showing a vehicle equipped with the energy storage module of the embodiment. Figure 2 It is a top view of the wiring module and the energy storage element. Figure 3 It is a side view of the bus bar. Figure 4 It is a perspective view of the bus bar. Figure 5 It is a perspective view of the bus bar in a state where the flexible part is elastically deformed. Figure 6 It is a perspective view of the bus bar housing part. Figure 7 It is a perspective view of the bus bar housing part housing the bus bar. Figure 8 It is a top view of the bus bar housing part housing the bus bar. Figure 9 It is Figure 8 The A-A cross-sectional view of Figure 10 It is a perspective view showing a case where the bus bar is housed in the bus bar housing part. Figure 11 It is in Figure 8 The cross-sectional view showing a case where the bus bar is housed in the bus bar housing part in the A-A cross-section of Detailed implementation mode

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

[0009] (1) The wiring module of the present disclosure is installed on a plurality of energy storage elements having electrode terminals. The wiring module includes: a bus bar; and a protection member having a bus bar housing part for housing the bus bar. The bus bar includes an electrode connection part connected to the electrode terminal and a flexible part disposed between the electrode connection parts adjacent in a first direction and capable of elastic deformation. The bus bar housing part includes: a bottom wall disposed between the bus bar and the energy storage element in a second direction orthogonal to the first direction; and a pressing wall disposed at at least one end in the first direction of the bus bar housing part and disposed opposite to the electrode connection part from a side opposite 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 bus bar in the first direction can be inserted.

[0010] According to such a structure, in a state where the flexible portion of the bus bar is elastically deformed, by inserting the end portion of the bus bar in the first direction into the insertion port and restoring the deformation of the flexible portion, the bus bar can be accommodated in the bus bar accommodating portion. Since the pressing wall is disposed opposite to the electrode connecting portion from the opposite side of the bottom wall in the second direction, the bus bar can be prevented from coming off in the second direction within the bus bar accommodating portion. Since the pressing wall can be formed flat in the second direction, it is easy to make the bus bar accommodating portion and the wiring module thinner in the second direction.

[0011] (2) Preferably, the pressing wall is disposed at both end portions of the bus bar accommodating portion in the first direction.

[0012] According to such a structure, it is even easier to prevent the bus bar from coming off within the bus bar accommodating portion.

[0013] (3) Preferably, a through hole penetrating the bottom wall in the second direction is provided in the bus bar accommodating portion, and when viewed from the second direction, the pressing wall is disposed at a position overlapping with the through hole.

[0014] According to such a structure, it is easy to insert the end portion of the bus bar in the first direction into the insertion port. In addition, by providing the through hole, even without using a sliding die, a bus bar accommodating portion having a pressing wall can be formed by a die with the pulling-out direction as the second direction. Therefore, compared with the structure without the through hole, it is easy to form the bus bar accommodating portion.

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

[0016] According to such a structure, when inserting the end portion of the bus bar in the first direction into the insertion port, the abutting wall abuts against the end portion of the bus bar in the first direction. Thereby, it is possible to limit the end portion of the bus bar in the first direction from being excessively inserted into the insertion port.

[0017] (5) Preferably, the flexible portion is formed by laminating a plurality of metal foils.

[0018] According to such a structure, the flexible portion can be simply formed.

[0019] [Details of Embodiments of the Present Disclosure] Hereinafter, embodiments of the present disclosure will be described. The present disclosure is not limited to the above examples, but refers to what is shown in the claims and includes all changes within the meaning equivalent to the claims and the scope.

[0020] <Embodiment> Refer to Figures 1 to 11An embodiment of the present disclosure will be described. The power storage module 10 including the wiring module 20 of the present embodiment is applied to the power storage assembly 2 mounted on the vehicle 1 as shown in, for example, Figure 1 . The power storage assembly 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, for a plurality of identical components, sometimes only some of the components are labeled with reference numerals, and the reference numerals of other components are omitted.

[0021] As shown in Figure 1 , the power storage assembly 2 is disposed near the center of the vehicle 1. A PCU 3 (Power Control Unit) is disposed at the front of the vehicle 1. The power storage assembly 2 and the PCU 3 are connected by a wiring harness 4. The power storage assembly 2 and the wiring harness 4 are connected by a connector (not shown). The power storage assembly 2 includes a power storage module 10 having a plurality of power storage elements 11. Hereinafter, except Figure 1 , the direction indicated by the arrow line Z is defined as the upper direction, the direction indicated by the arrow line X is defined as the front direction, and the direction indicated by the arrow line Y is defined as the left direction for description. In addition, in the present embodiment, the front-rear direction is an example of the first direction, and the up-down direction is an example of the second direction.

[0022] As shown in Figure 2 , the power storage module 10 includes a plurality of power storage elements 11 arranged in a row and a wiring module 20 assembled on the upper surfaces of the plurality of power storage elements 11. The power storage element 11 has a flat rectangular parallelepiped shape in which a power storage element (not shown) is housed inside. The power storage element 11 has electrode terminals 12A and 12B for the positive electrode and the negative electrode on the upper surface.

[0023] [Wiring Module] The wiring module 20 includes a bus bar 30 connected to the power storage element 11, a flexible substrate 21 connected to the bus bar 30, and a protection member 40 that holds the bus bar 30 and the flexible substrate 21. The power storage module 10 is configured to include a wiring module 20 disposed on the right side of the plurality of power storage elements 11 and connected to the electrode terminals 12A and 12B, and a wiring module 20 disposed on the left side of the plurality of power storage elements 11 and connected to the electrode terminals 12A and 12B, and both have the same structure. Hereinafter, regarding the structure related to the bus bar housing portion 41, the structure of each component will be described based on the arrangement of each component of the wiring module 20 disposed on the left side of the plurality of power storage elements 11 and connected to the electrode terminals 12A and 12B.

[0024] [Flexible Substrate] The flexible substrate 21 is integrally formed in a strip shape that is elongated in the front-rear direction. The flexible substrate 21 is formed 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, a protruding portion 23 that protrudes from the substrate main body 22, and a substrate-side connection portion 24 disposed at the end of the protruding portion 23.

[0025] The substrate main body 22 is fixed to the substrate housing portion 46 of the following protection member 40. Although not shown in detail, for example, insertion through holes are provided in the substrate main body 22, and protrusions protruding from the bottom wall 48 of the substrate housing portion 46 are inserted through the insertion through holes. The protruding portion 23 is formed to be relatively long in the front-rear direction. A cutout is provided in the protruding portion 23 and is configured to be able to expand and contract. By providing the protruding portion 23, the substrate-side connection portion 24 is allowed to displace a specified dimension relative to the substrate main body 22. The substrate-side connection portion 24 is a portion that connects to the metal debris 15, and one end of a voltage detection line (not shown) is disposed.

[0026] The flexible substrate 21 is connected to a flexible substrate connector (not shown) at its front and rear ends in the front-rear direction. Terminals are housed inside the connector. The terminals are electrically connected to the other ends (not shown) of the voltage detection lines of the flexible substrate 21.

[0027] The connector is connected to an external ECU (Electronic Control Unit), etc. The ECU is equipped with a microcomputer, components, etc., and is a well-known structure 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.

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

[0029] [Electrode connection portion] The electrode connection portion 31 is formed of a single metal plate and has rigidity. In the electrode connection portion 31, through holes 31A that penetrate the metal plate forming the electrode connection portion 31 in the up-down direction are provided. The through holes 31A can be used, for example, to confirm whether the electrode connection portion 31 is in proper contact with the electrode terminals 12A and 12B. As another method, protrusions can also be provided on the electrode terminals 12A and 12B, and the electrode terminals 12A and 12B can be positioned by inserting the protrusions through the through holes 31A. The electrode connection portion 31 is connected to the electrode terminals 12A and 12B by welding or the like. In addition, the electrode connection portion 31 and the electrode terminals 12A and 12B can also be connected by bolt fastening or the like.

[0030] As Figure 3 shown, the electrode connection part 31 includes a main body part 31B and a flexible part connection part 31C disposed at the end of the electrode connection part 31 on the side of the flexible part 32. The flexible part connection part 31C is connected to the main body part 31B via a step. The flexible part connection part 31C is substantially parallel to the main body part 31B and is disposed at a position above the main body part 31B. The flexible part connection part 31C overlaps the upper side of 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 welding or the like, for example.

[0031] As Figure 4 shown, in the main body part 31B, a pair of engaging recesses 31D are formed recessed from the left and right end edges of the main body part 31B. The engaging recesses 31D are engaged with the engaging protrusions 42C of the following bus bar housing part 41.

[0032] [Flexible part] The flexible part 32 is formed by laminating a plurality of metal foils. As Figure 3 shown, the flexible part 32 includes a base part 32A and a protruding part 32B that is substantially inverted U-shaped and protrudes upward when viewed from the side of the base part 32A. The base part 32A is disposed on the front and rear sides of the protruding part 32B and overlaps the lower side of the flexible part connection part 31C of the electrode connection part 31. The flexible part 32 has flexibility and can be elastically deformed. As Figure 4 shown, a plurality of (three in this embodiment) slits 32C penetrating the protruding part 32B are provided in the flexible part 32. Each slit 32C extends in the front-rear direction. By providing a plurality of slits 32C, the flexible part 32 is easily deformed in the left-right direction. By providing the flexible part 32, manufacturing tolerances, assembly tolerances, etc. of the bus bar 30, the protection part 40, and the electrode terminals 12A and 12B can be absorbed. In addition, when the above components expand and contract due to temperature changes, it is easy to allow dimensional changes caused by the expansion and contraction of each component.

[0033] When the flexible part 32 is in a natural state, as Figure 3 and Figure 4 shown, the two main body parts 31B of the bus bar 30 are arranged substantially parallel. In addition, by elastically deforming the flexible part 32, a configuration in which the two main body parts 31B cross each other can be adopted as Figure 5 shown. In other words, the bus bar 30 can be bent in such a way that the two main body parts 31B approach each other with the flexible part 32 substantially as the center.

[0034] In this embodiment, as Figure 3As shown, the protrusion 32B protrudes upward from the base 32A, and the flexible part connection part 31C is arranged at a position above the base 32A. According to such a structure, it is easy to reduce the size of the bus bar 30 in the vertical direction. Therefore, it is easy to make the wiring module 20 thinner.

[0035] As Figure 2 shown, the electrode terminals 12A and 12B at the front end or rear end of the plurality of power storage elements 11 are connected to an external device through the end bus bar 33. Different from the above-mentioned bus bar 30, the end bus bar 33 does not have a flexible part 32 and is composed of a single metal plate. The end bus bar 33 is fixed to the front and rear ends of the protection member 40.

[0036] [Protection member] The protection member 40 is made of an insulating synthetic resin. The protection member 40 has a bus bar storage portion 41 for storing the bus bar 30 and a substrate storage portion 46 for storing the flexible substrate 21. The bus bar storage portion 41 is in a frame shape and is arranged in the front and rear directions.

[0037] [Bus bar storage portion] Hereinafter, regarding the structure related to the bus bar storage portion 41, as Figures 6 to 11 shown, the structure of each component will be described based on the arrangement of each component in the wiring module 20 arranged on the left side of the plurality of power storage elements 11. As Figure 6 shown, the bus bar storage portion 41 has a peripheral wall 42, a bottom wall 43 extending horizontally from the lower end portion of the peripheral wall 42 toward the inside of the peripheral wall 42, and pressing walls 44 extending in the front and rear directions from the upper side portions of the front and rear ends of the peripheral wall 42 toward the inside of the bus bar storage portion 41.

[0038] [Bottom wall, through hole] As Figure 9 shown, the bottom wall 43 faces the lower surface of the bus bar 30. A connection hole 43A penetrating the bottom wall 43 in the vertical direction is provided in the bus bar storage portion 41. The connection hole 43A is arranged at a position occupying most of the central portion of the bus bar storage portion 41. The electrode connection portion 31 of the bus bar 30 arranged in the bus bar storage portion 41 is connected to the electrode terminals 12A and 12B of the power storage element 11 via the connection hole 43A. Through holes 43B penetrating the bottom wall 43 in the vertical direction are provided at both ends of the bus bar storage portion 41 in the front and rear directions.

[0039] [Contact wall] The peripheral wall 42 has contact walls 42A arranged at the hole edge portions of the through holes 43B. The contact walls 42A are arranged at both ends of the bus bar storage portion 41 in the front and rear directions. The lower surface of the contact wall 42A and the lower surface of the bottom wall 43 are arranged at the same height position.

[0040] As Figure 6As shown, a cutout portion 42B is provided in a portion of the peripheral wall 42 that extends in the front-rear direction. The cutout portion 42B is disposed at a position near the front end portion and a position near the rear end portion of the peripheral wall 42 disposed on the right side of the bus bar housing portion 41.

[0041] The bus bar housing portion 41 includes an engagement convex portion 42C that projects inward from the peripheral wall 42 toward the bus bar housing portion 41. In the present embodiment, the engagement convex portion 42C is provided so as to project from the left and right peripheral walls 42. In a state where the bus bar 30 is disposed in the bus bar housing portion 41, as Figure 7 and Figure 8 shown, the engagement convex portion 42C engages with the engagement concave portion 31D. Thereby, in the bus bar housing portion 41, the bus bar 30 is positioned in the front-rear direction.

[0042] [Pressing wall, insertion port] As Figure 9 shown, the pressing wall 44 and the bottom wall 43 are disposed separately in the up-down direction. The interval between the pressing wall 44 and the bottom wall 43 in the up-down direction is set to be slightly larger than the thickness (dimension in the up-down direction) of the electrode connection portion 31. The pressing wall 44 and the bottom wall 43 constitute an insertion port 45 that opens in the front-rear direction. The insertion port 45 is disposed at positions near the front end portion and the rear end portion in the bus bar housing portion 41. As will be described below, the insertion port 45 is an opening into which the front end portion or the rear end portion of the bus bar 30 is inserted.

[0043] The intervals in the front-rear direction between the two pressing walls 44 disposed at the front and rear ends of the bus bar housing portion 41 are smaller than the dimension of the bus bar 30 in the front-rear direction in a natural state. In a state where the bus bar 30 is disposed in the bus bar housing portion 41, the pressing wall 44 is disposed above the electrode connection portion 31. Thereby, the bus bar 30 is prevented from coming off in the bus bar housing portion 41.

[0044] When viewed from the up-down direction, the pressing wall 44 is disposed at a position overlapping the through hole 43B. According to such a structure, the pressing wall 44 can be easily formed by pulling out the mold in the up-down direction.

[0045] As Figure 2 shown, the substrate housing portion 46 extends in the front-rear direction and is formed in a groove shape. The substrate housing portion 46 includes a pair of left and right side walls 47 and a bottom wall 48 that connects the lower end portions of the pair of side walls 47. A cutout portion 47A is provided in the side wall 47 of the pair of side walls 47 that is closer to the bus bar housing portion 41 and at a position corresponding to the cutout portion 42B of the bus bar housing portion 41.

[0046] At the cut portions 42B and 47A, a metal piece 15 for electrically connecting the bus bar 30 and the voltage detection line of the flexible substrate 21 is disposed. 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 performed by, for example, brazing. The connection between the metal piece 15 and the bus bar 30 is performed by, for example, welding.

[0047] [Insertion of the bus bar into the bus bar housing portion] Hereinafter, the steps of housing the bus bar 30 in the bus bar housing portion 41 will be described. First, as Figure 5 shown, the flexible portion 32 of the bus bar 30 is elastically deformed, and the bus bar 30 is bent at the flexible portion 32. As a result, a configuration in which the two main body portions 31B cross each other is obtained. In addition, compared with the case where the bus bar 30 is in a natural state, the length of the bus bar 30 in the front-rear direction becomes smaller.

[0048] As Figure 10 and Figure 11 shown, the front edge and the rear edge of the elastically deformed bus bar 30 are respectively inserted below the pressing walls 44 at the front end portion and the rear end portion of the bus bar housing portion 41 and inserted into the insertion port 45. Here, as Figure 11 shown, since the pressing wall 44 is located at a position overlapping the through hole 43B in a plan view, the front and rear edges of the bus bar 30 inserted into the insertion port 45 can enter the through hole 43B and do not interfere with the bottom wall 43. Therefore, it is easy to insert the front and rear edges of the bus bar 30 into the insertion port 45 respectively. In addition, since the abutting walls 42A are provided at the front and rear end portions of the peripheral wall 42 of the bus bar housing portion 41, the front and rear edges of the bus bar 30 inserted into the inside of the insertion port 45 are abutted against the abutting walls 42A, thereby suppressing the bus bar 30 from being disposed at a position in front of the front end portion of the bus bar housing portion 41 or behind the rear end portion.

[0049] In a state where the front edge and the rear edge of the elastically deformed bus bar 30 are respectively inserted into the insertion ports 45 at the front and rear ends of the bus bar housing portion 41, the flexible portion 32 is elastically restored. As a result, the bus bar 30 becomes a natural state (refer to Figure 9 ). The two main body portions 31B are disposed substantially in parallel, and the length of the bus bar 30 in the front-rear direction becomes larger than that at the time of elastic deformation. The bottom wall 43 is disposed so as to be able to abut against the lower surface of the bus bar 30 from below. The pressing wall 44 is disposed so as to be able to abut against the front end portion or the rear end portion of the bus bar 30 from above. Therefore, the bus bar 30 can be prevented from coming off from the bus bar housing portion 41.

[0050] In addition, when the bus bar 30 is elastically restored, the engaging convex portion 42C is engaged with the inner wall of the engaging concave portion 31D (refer to Figure 7 and Figure 10)。By engaging the inner wall of the engaging recess 31D with the engaging projection 42C, positioning of the bus bar 30 in the front-rear direction can be performed within the bus bar housing portion 41. In summary, the housing of the bus bar 30 into the bus bar housing portion 41 is completed.

[0051] [Function and Effect of Embodiment] According to the embodiment, the following functions and effects are achieved. The wiring module 20 of the embodiment is a wiring module 20 mounted on a plurality of power storage elements 11 having electrode terminals 12A and 12B, and includes a bus bar 30 and a protective member 40 having a bus bar housing portion 41 for housing the bus bar 30. The bus bar 30 includes an electrode connection portion 31 connected to the electrode terminals 12A and 12B, and a flexible portion 32 disposed between the electrode connection portions 31 adjacent in the first direction (front-rear direction) and capable of elastic deformation. The bus bar housing portion 41 includes a bottom wall 43 disposed between the bus bar 30 and the power storage element 11 in the second direction (up-down direction) orthogonal to the first direction, and a pressing wall 44 disposed at at least one end portion of the bus bar housing portion 41 in the first direction and disposed opposite to the electrode connection portion 31 from the opposite side of the bottom wall 43 in the second direction. The bottom wall 43 and the pressing wall 44 constitute an insertion port 45 into which the end portion of the bus bar 30 in the first direction can be inserted.

[0052] According to such a structure, in a state where the flexible portion 32 of the bus bar 30 is elastically deformed, by inserting the end portion of the bus bar 30 in the first direction into the insertion port 45 and restoring the deformation of the flexible portion 32, the bus bar 30 can be housed in the bus bar housing portion 41. Since the pressing wall 44 is disposed opposite to the electrode connection portion 31 from the opposite side of the bottom wall 43 in the second direction, the bus bar 30 can be prevented from coming off within the bus bar housing portion 41 in the second direction. Since the pressing wall 44 can be formed flat in the second direction, it is easy to make the bus bar housing portion 41 and the wiring module 20 thinner in the second direction.

[0053] In the embodiment, the pressing walls 44 are disposed at both end portions of the bus bar housing portion 41 in the first direction.

[0054] According to such a structure, it is easy to further prevent the bus bar 30 from coming off by using the bus bar housing portion 41.

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

[0056] According to such a structure, it is easy to insert the end portion of the bus bar 30 in the first direction into the insertion port 45. In addition, by providing the through hole 43B, even without using a sliding die, it is possible to form the bus bar storage portion 41 having the pressing wall 44 by a die with the pulling-out direction as the second direction. Therefore, compared with the structure without the through hole 43B, it is easier to form the bus bar storage portion 41.

[0057] In the embodiment, the bus bar storage portion 41 includes an abutting wall 42A disposed to face the end portion of the bus bar 30 in the first direction in the first direction.

[0058] According to such a structure, when inserting the end portion of the bus bar 30 in the first direction into the insertion port 45, the abutting wall 42A abuts against the end portion of the bus bar 30 in the first direction. Thereby, it is possible to limit the end portion of the bus bar 30 in the first direction from being excessively inserted into the insertion port 45.

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

[0060] According to such a structure, the flexible portion 32 can be simply formed.

[0061] <Other Embodiments> (1) In the above embodiment, the bus bar 30 is configured to be bent into a configuration where two main body portions 31B intersect, and is inserted obliquely with respect to the insertion port 45. However, it is not limited thereto. The bus bar may also be configured to be elastically deformable in the front-rear direction in a state where the two electrode connection portions can maintain a parallel posture, and inserted into the insertion port in the front-rear direction. (2) In the above embodiment, the bus bar storage portion 41 has pressing walls 44 at both end portions in the front-rear direction. However, it is not limited thereto. The pressing wall may be provided only at one end portion of the bus bar storage portion in the front-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, it is not limited thereto. The electrode connection portion and the flexible portion may also be integrally formed of the same component. (4) In the above embodiment, the bus bar 30 includes two electrode connection portions 31 and one flexible portion 32. However, it is not limited thereto. For example, when the bus bar connects the power storage elements in parallel, setting n as an integer of 3 or more, the bus bar may also include n electrode connection portions and (n - 1) flexible portions. (5) In the above embodiment, the flexible portion 32 is formed by laminating a plurality of 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 its manner is not limited. For example, the flexible portion may not have a slit. In addition, the flexible portion may also be formed of a wire, a braided wire, or the like.

[0063] (6) In the above-described embodiment, the flexible substrate 21 is used as the voltage detection line, but it is not limited thereto. For example, as the voltage detection line, a wire can be used, or a wire and a flexible substrate can be used. (7) In the above-described embodiment, the bus bar 30 is electrically connected to the flexible substrate 21 via the metal piece 15, but it is not limited thereto. The bus bar and the flexible substrate can also be directly connected by welding, brazing, or the like. Description of Reference Numerals

[0064] 1: Vehicle 2: Power storage assembly 3: PCU 4: Wiring harness 10: Power storage module 11: Power storage element 12A, 12B: Electrode terminals 15: Metal piece 20: Wiring module 21: Flexible substrate 22: Substrate body 23: Protruding portion 24: Substrate-side connection portion 30: Bus bar 31: Electrode connection portion 31A: Through hole 31B: Main body portion 31C: Soft portion connection portion 31D: Engaging recess 32: Soft portion 32A: Base portion 32B: Protruding portion 32C: Slit 33: End bus bar 40: Protective member 41: Bus bar housing portion 42: Peripheral wall 42A: Contact wall 42B: Cutout portion 42C: Engaging convex portion 43: Bottom wall 43A: Connection hole 43B: Through hole 44: Pressing wall 45: Insertion port 46: Substrate housing portion 47: Side wall 47A: Cutout portion 48: Bottom wall

Claims

1. A wiring module is installed on a plurality of power storage elements having electrode terminals, wherein, Comprising: A bus bar; and A protective member having a bus bar housing portion for housing the bus bar, The bus bar has an electrode connection portion connected to the electrode terminal and a flexible portion disposed between the electrode connection portions adjacent in the first direction and capable of elastic deformation, The bus bar housing portion includes: a bottom wall disposed between the bus bar and the power storage element in a second direction orthogonal to the first direction; and a pressing wall disposed at at least one end portion of the bus bar housing portion in the first direction and disposed opposite to the electrode connection portion from the side opposite to the bottom wall in the second direction, The bottom wall and the pressing wall form an insertion port into which an end portion of the bus bar in the first direction can be inserted.

2. The wiring module according to claim 1, wherein The pressing wall is disposed at both end portions of the bus bar housing portion in the first direction.

3. The wiring module according to claim 1 or claim 2, wherein A through hole penetrating the bottom wall in the second direction is provided in the bus bar housing portion, When viewed from the second direction, the pressing wall is disposed at a position overlapping the through hole.

4. The wiring module according to claim 1 or claim 2, wherein The bus bar housing portion has an abutment wall disposed opposite to an end portion of the bus bar in the first direction in the first direction.

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

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