Wiring module

Abstract

To provide a wiring module having excellent connection reliability between a bus bar and an electrode terminal, and excellent connection reliability between the bus bar and a wiring material.SOLUTION: A wiring module 20 is a wiring module 20 attached to a plurality of power storage elements having an electrode terminal, comprising: a bus bar 30; and a wiring material 40. The bus bar 30 comprises: an electrode connection part 31 connected to the electrode terminal; and a lamination part 32 that is constructed so that a plurality of plate-like base materials are laminated, and couples two adjacent electrode connection parts 31. The lamination part 32 comprises a wiring material connection part 37 electrically connected to the wiring material 40.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] Conventionally, a busbar described in JP 2023-47446 A (Patent Document 1 below) is known. The busbar in Patent Document 1 includes two connection parts and an intermediate part that connects the two connection parts. The connection parts are connected to the electrode terminals of the energy storage element. The intermediate part has a mountain shape that protrudes upward from the connection parts. The intermediate part can absorb misalignment of the two connection parts. The busbar is formed by stacking a plurality of plate-shaped base materials in the vertical direction. This allows the intermediate part to be formed more flexibly compared to a case in which the busbar is formed from a single metal plate material.

[0003] Furthermore, JP 2019-207825 A (Patent Document 2 below) describes a wiring module including a connection bus bar connected to an electrode terminal and a voltage detection line. The connection bus bar has a bent portion that protrudes in a direction away from the electrode terminal (upward). The voltage detection line is connected to a portion of the connection bus bar that is connected to the electrode terminal (a portion different from the bent portion) via a voltage detection terminal. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-47446 A [Patent Document 2] JP 2019-207825 A Summary of the Invention [Problem to be solved by the invention]

[0005] When configuring a wiring module by connecting wiring materials such as voltage detection wires to the bus bar of Patent Document 1, the wiring materials will be connected to the connection parts of the bus bar if the configuration described in Patent Document 2 is applied. However, for example, when the bus bar is made smaller, it may be difficult to simultaneously connect the connection parts to the wiring materials and connect the connection parts to the electrode terminals.

[0006] Furthermore, it is preferable that the connection portion has a certain strength for the process of connecting with the electrode terminal, but since the busbar in Patent Document 1 is constructed by stacking multiple base materials, there is a risk that the strength of the connection portion will be reduced. [Means for solving the problem]

[0007] The wiring module of the present disclosure is a wiring module that is attached to a plurality of energy storage elements having electrode terminals, and includes a bus bar and wiring material, wherein the bus bar includes an electrode connection portion connected to the electrode terminal, and a lamination portion that is constructed by stacking a plurality of plate-shaped base materials and connects two adjacent electrode connection portions, and the lamination portion includes a wiring material connection portion that is electrically connected to the wiring material. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a wiring module having excellent connection reliability between a bus bar and an electrode terminal, and between a bus bar and a wiring material. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a plan view of the electricity storage module according to the first embodiment. [Diagram 2] FIG. 2 is an enlarged perspective view of the wiring module according to the first embodiment. [Diagram 3] FIG. 3 is an enlarged bottom view of the wiring module according to the first embodiment. [Figure 4] FIG. 4 is a plan view of the bus bar according to the first embodiment. [Diagram 5]FIG. 5 is a side view of the bus bar according to the first embodiment. [Figure 6] FIG. 6 is an enlarged side view of a laminated portion of the bus bar shown in FIG. [Figure 7] FIG. 7 is an enlarged perspective view of the wiring module according to the second embodiment. [Figure 8] FIG. 8 is an enlarged bottom view of the wiring module according to the second embodiment. [Figure 9] FIG. 9 is an enlarged perspective view of a wiring module according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. [1] The wiring module disclosed herein is a wiring module attached to a plurality of energy storage elements having electrode terminals, and includes a bus bar and wiring material. The bus bar includes an electrode connection portion connected to the electrode terminals, and a lamination portion configured by stacking a plurality of plate-shaped base materials and connecting two adjacent electrode connection portions, and the lamination portion includes a wiring material connection portion electrically connected to the wiring material.

[0011] According to this configuration, the electrode connection portion can be formed separately from the laminate portion having a configuration in which a plurality of base materials are laminated, so that the strength of the electrode connection portion can be improved, and thus it becomes easier to electrically connect the electrode connection portion to the electrode terminal.

[0012] According to the above configuration, the busbar and the wiring can be electrically connected by the wiring connection portion of the laminated portion. Also, since it is not necessary to provide a wiring connection portion at the electrode connection portion, it is easy to ensure electrical connection between the electrode connection portion and the electrode terminal even when the busbar is miniaturized, for example.

[0013] [2] In the above item [1], it is preferable that the laminated portion includes an overlapping portion that overlaps with the electrode connection portion and is connected to the electrode connection portion, and the overlapping portion includes the wiring material connection portion.

[0014] According to this configuration, the wiring member connection portion is formed in an overlapping portion of the laminate that is connected to the electrode connection portion. The overlapping portion is a portion of the laminate that has low flexibility because it is configured to overlap the electrode connection portion and be connected to the electrode connection portion. Therefore, by providing the wiring member connection portion in the overlapping portion, it is possible to prevent a loss of flexibility in the portion of the laminate that is not overlapped with the electrode connection portion and to prevent stress from being applied to the connection portion between the wiring member connection portion and the wiring member.

[0015] [3] In the above [1] or [2], it is preferable that the electrode connection portion is made of a first metal, the plurality of substrates include at least one first substrate made of the first metal and at least one second substrate made of a second metal different from the first metal, the wiring material includes a conductor portion made of the second metal, the electrode connection portion is connected to the first substrate, and the wiring material connection portion is formed of a second substrate and connected to the conductor portion.

[0016] According to this configuration, the connection between the electrode connection portion and the laminate portion, and the connection between the wiring member connection portion and the wiring member are made between the same metals, which makes these connections easier.

[0017] [4] In any one of [1] to [3] above, it is preferable that the laminated portion has an extension portion extending outward from the electrode connection portions in a third direction perpendicular to both a first direction in which the electrode connection portions are arranged and a second direction in which the electrode connection portions and the electrode terminals face each other, and that the extension portion has the wiring material connection portion.

[0018] According to this configuration, even in a state in which the wiring material extends in the first direction, it is possible to connect the wiring material and the wiring material connecting portion.

[0019] [Details of the embodiment of the present disclosure] The following describes embodiments of the present disclosure. The present disclosure is not limited to these examples, but is shown by the claims, and is intended to include all modifications within the meaning and scope of the claims. In each drawing, for convenience of explanation, some of the configurations may be exaggerated or simplified. In addition, the dimensional ratios of each part may differ in each drawing. In this specification, "orthogonal" does not only mean strictly orthogonal, but also includes roughly orthogonal within the range in which the action and effect of this embodiment are achieved.

[0020] In addition, "facing" in this specification refers to surfaces or members facing each other, and includes not only cases where they are completely facing each other, but also cases where they are partially facing each other. In addition, "facing" in this specification includes both cases where a member other than the two parts is interposed between the two parts, and cases where nothing is interposed between the two parts.

[0021] <Embodiment 1> A first embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 6. An energy storage module 10 including a wiring module 20 of this embodiment is mounted on a vehicle as a power source for driving the vehicle, such as an electric vehicle or a hybrid vehicle. In the following description, the direction indicated by the arrow Z is the upward direction, the direction indicated by the arrow X is the forward direction, and the direction indicated by the arrow Y is the leftward direction. Note that, for multiple identical components, only some of the components may be labeled with reference numerals, and the reference numerals of the other components may be omitted.

[0022] As shown in FIG. 1 , the energy storage module 10 includes a plurality of energy storage elements 11 arranged in a line, and a wiring module 20 attached to the upper surfaces of the plurality of energy storage elements 11. The wiring module 20 is attached to both ends in the left-right direction of the plurality of energy storage elements 11. The energy storage elements 11 have a flat rectangular parallelepiped shape with energy storage elements housed inside. The energy storage elements 11 have two electrode terminals 12 at both ends in the left-right direction of the upper surface. One of the two electrode terminals 12 is a positive electrode, and the other is a negative electrode. The electrode terminals 12 are electrically connected to a bus bar 30.

[0023] (Wiring module 20) As shown in FIGS. 1 to 3, the wiring module 20 includes a bus bar 30 and a wiring member 40 connected to the bus bar 30.

[0024] (Bus bar 30, electrode connection portion 31, first metal M1) As shown in FIG. 4, the busbar 30 has a rectangular shape in a plan view. The busbar 30 includes two electrode connection portions 31 and a laminated portion 32 that connects the two adjacent electrode connection portions 31. The two electrode connection portions 31 are arranged side by side in the front-rear direction. As shown in FIG. 5, the electrode connection portion 31 is formed by bending a single metal plate. In this embodiment, the electrode connection portion 31 is made of a first metal M1. The first metal M1 is, for example, aluminum or an aluminum alloy. The electrode connection portion 31 includes a main body portion 31A and an extension portion 31B that extends from the main body portion 31A. As shown in FIG. 4, the electrode connection portion 31 has a through hole 31C that penetrates the main body portion 31A in the up-down direction.

[0025] As shown in FIG. 1, the main body 31A is disposed so as to face the electrode terminal 12 in the up-down direction, and is connected to the electrode terminal 12 by, for example, welding. In this embodiment, the electrode terminal 12 is made of a first metal M1. Since the electrode terminal 12 and the main body 31A are made of the same metal, electrical connection between the electrode terminal 12 and the main body 31A is facilitated. In addition, electrolytic corrosion is prevented at the connection portion between the electrode terminal 12 and the main body 31A. The through hole 31C engages with a protrusion (not shown) protruding from the electrode terminal 12. This determines the position of the bus bar 30 and the electrode terminal 12.

[0026] (Laminated part 32, base material 33, first base material 33A, second base material 33B, second metal M2) As shown in Figs. 5 and 6, the laminated section 32 is configured by stacking a plurality of plate-shaped base materials 33. The base materials 33 are, for example, thin metal plates or metal foils. The plurality of base materials 33 are connected to each other, for example, by welding or brazing. As shown in Fig. 6, in this embodiment, the plurality of base materials 33 include a plurality of (specifically, seven) first base materials 33A and one second base material 33B. The first base material 33A is configured from a first metal M1. The second base material 33B is configured from a second metal M2 different from the first metal M1. The second metal M2 is, for example, copper or a copper alloy.

[0027] (Superimposing unit 34) As shown in FIG. 5, the laminated portion 32 includes two overlapping portions 34 overlapping the extension portion 31B, and a main body portion 35 disposed between the two overlapping portions 34. In this embodiment, the overlapping portions 34 are overlapped below the extension portion 31B. The upper surface of the overlapping portions 34 is connected to the extension portion 31B by, for example, welding. As shown in FIG. 6, in the overlapping portion 34, the first base material 33A and the second base material 33B are stacked in the vertical direction, and the second base material 33B is disposed at the lowest position among the multiple base materials 33. The multiple first base materials 33A are disposed above the single second base material 33B. That is, the upper surface of the overlapping portion 34 is constituted by the first base material 33A and is constituted by the first metal M1. Since the extension portion 31B is also constituted by the first metal M1, it is easy to electrically connect the upper surface of the overlapping portion 34 and the extension portion 31B. Furthermore, electrolytic corrosion is prevented at the connection portion between the overlapping portion 34 and the extension portion 31B.

[0028] As shown in FIG. 5, in this embodiment, the main body 35 is formed in a mountain shape protruding upward from the overlapping portion 34. The main body 35 includes two side portions 35A rising from the overlapping portion 34 and a ceiling portion 35B connecting the upper ends of the two side portions 35A. By providing the main body 35 in a mountain shape, the main body 35 is made elastically deformable, and the two electrode connection portions 31 are allowed to be displaced from each other in the front-rear direction and the up-down direction to a certain extent. Therefore, it is possible to absorb the assembly tolerance between the electrode connection portions 31 and the electrode terminals 12. In addition, it is possible to allow the expansion and contraction of the energy storage element 11 due to temperature changes.

[0029] 3, the laminated portion 32 has a plurality of slits 36 formed therein, penetrating the main body portion 35 and a portion of the overlapping portion 34 closer to the main body portion 35. Each slit 36 ​​extends in the front-rear direction. By providing the slits 36 in the main body portion 35, it becomes possible to allow the two electrode connection portions 31 to be displaced from each other in the left-right direction to a certain extent. This makes it possible to allow the energy storage element 11 to expand and contract due to temperature changes.

[0030] (Wiring material connection part 37) 2 and 3, one of the two overlapping portions 34 included in the laminated portion 32 includes a wiring connection portion 37. The wiring connection portion 37 is a portion of the busbar 30 that is electrically connected to the wiring 40 described below. In FIGS. 2 and 3, the wiring connection portion 37 is located in the overlapping portion 34 located on the front side. The wiring connection portion 37 is located on the lower surface of the overlapping portion 34. In the overlapping portion 34, the substrate 33 located on the lowermost side is the second substrate 33B (see FIG. 6). Thus, the wiring connection portion 37 is part of the second substrate 33B, and is formed from the second metal M2.

[0031] (Wiring material 40) As shown in FIG. 3, the wiring material 40 includes a conductor portion 41 and a support member 42 that supports the conductor portion 41. In this embodiment, the wiring material 40 is a flexible printed circuit board. The support member 42 is made of an insulating synthetic resin and includes a base film and a coverlay film. In this embodiment, the conductor portion 41 is made of a second metal M2. The conductor portion 41 has a thin wire shape. A land portion 41A is formed at an end of the conductor portion 41. The land portion 41A is wider than the other portions of the conductor portion 41. The conductor portion 41 is formed on the base film and is covered from above by a coverlay film. An opening that exposes the land portion 41A upward is formed in the coverlay film.

[0032] The wiring material 40 includes a main body 43 extending in the front-rear direction, and a connection piece 44 extending in the left-right direction from the main body 43. A land portion 41A is disposed on the connection piece 44. The connection piece 44 is superimposed under the wiring material connection portion 37 of the overlapping portion 34. The land portion 41A and the wiring material connection portion 37 are connected by, for example, soldering. The land portion 41A and the wiring material connection portion 37 are made of the second metal M2, which facilitates electrical connection between the land portion 41A and the wiring material connection portion 37.

[0033] The end of the conductor portion 41 opposite to the land portion 41A is connected to a connector (not shown). This connector is adapted to be connected to an external ECU (Electronic Control Unit) or the like. The ECU is equipped with a microcomputer, elements, etc., and has a well-known configuration 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. The conductor portion 41 functions as a voltage detection line.

[0034] The overlapping portion 34 of the laminated portion 32 is connected to the electrode connection portion 31 and is not easily deformed. On the other hand, the main body portion 35 of the laminated portion 32 is elastically deformable and has flexibility. Unlike the present embodiment, if a wiring member connection portion is provided on the main body portion, the flexibility of the main body portion may be impaired by connection to the wiring member. In addition, there is a risk that stress will be applied to the connection portion between the wiring member connection portion and the wiring member when the main body portion deforms. However, in the present embodiment, the wiring member connection portion 37 is provided on the overlapping portion 34, not on the main body portion 35. This makes it possible to maintain the reliability of the connection between the busbar 30 and the wiring member 40 without impairing the flexibility of the main body portion 35.

[0035] (Effects of the First Embodiment) (1-1) The wiring module 20 in embodiment 1 is a wiring module 20 attached to a plurality of energy storage elements 11 having electrode terminals 12, and includes a bus bar 30 and wiring material 40. The bus bar 30 includes an electrode connection portion 31 connected to the electrode terminal 12, and a laminate portion 32 configured by stacking a plurality of plate-shaped base materials 33 and connecting two adjacent electrode connection portions 31. The laminate portion 32 includes a wiring material connection portion 37 electrically connected to the wiring material 40.

[0036] According to this configuration, the electrode connection part 31 can be formed separately from the laminated part 32 having a configuration in which a plurality of base materials 33 are laminated, thereby improving the strength of the electrode connection part 31. This makes it easier to electrically connect the electrode connection part 31 and the electrode terminal 12.

[0037] Furthermore, with the above configuration, the bus bar 30 and the wiring material 40 can be electrically connected by the wiring material connection portion 37 included in the laminated portion 32. Moreover, since it is not necessary to provide the wiring material connection portion 37 in the electrode connection portion 31, it is easier to ensure the electrical connection between the electrode connection portion 31 and the electrode terminal 12 even when the bus bar 30 is miniaturized, for example.

[0038] (1-2) In the first embodiment, the laminated portion 32 includes an overlapping portion 34 that overlaps with the electrode connection portion 31 and is connected to the electrode connection portion 31 , and the overlapping portion 34 includes a wiring member connection portion 37 .

[0039] According to this configuration, wiring member connection portion 37 is formed in overlapping portion 34 of laminated portion 32, which is connected to electrode connection portion 31. Overlapping portion 34 is configured to overlap electrode connection portion 31 and be connected to electrode connection portion 31, and is therefore a less flexible portion of laminated portion 32. Therefore, by providing wiring member connection portion 37 in overlapping portion 34, it is possible to prevent a loss of flexibility in portions of laminated portion 32 that are not overlapped with electrode connection portion 31 and to prevent stress from being applied to the connection portion between wiring member connection portion 37 and wiring member 40.

[0040] (1-3) In embodiment 1, the electrode connection portion 31 is made of a first metal M1, the multiple substrates 33 include at least one first substrate 33A made of the first metal M1 and at least one second substrate 33B made of a second metal M2 different from the first metal M1, the wiring material 40 includes a conductor portion 41 made of the second metal M2, the electrode connection portion 31 is connected to the first substrate 33A, and the wiring material connection portion 37 is formed of the second substrate 33B and connected to the conductor portion 41.

[0041] With this configuration, for example, when electrode terminal 12 is made of a first metal M1 and conductor portion 41 is made of a second metal M2, the connection between electrode terminal 12 and electrode connection portion 31, the connection between electrode connection portion 31 and laminate portion 32, and the connection between wiring member connection portion 37 and wiring member 40 are connections between the same metals, which makes these connections easier.

[0042] <Embodiment 2> A second embodiment of the present disclosure will be described with reference to Figs. 7 and 8. A wiring module 120 according to the second embodiment includes a bus bar 130 and wiring material 140. In this embodiment, the front-rear direction is an example of the first direction. The up-down direction is an example of the second direction. The left-right direction is an example of the third direction. Hereinafter, the same components as those in the first embodiment may be given the same reference symbols as those in the first embodiment, and descriptions thereof may be omitted. Furthermore, descriptions of the effects that overlap with those in the first embodiment will be omitted.

[0043] The busbar 130 includes two electrode connection portions 31 and a laminated portion 132. As in the first embodiment, the laminated portion 132 includes a plurality of first base materials 33A and a single second base material 33B that is laminated below the plurality of first base materials 33A (see FIG. 6). The laminated portion 132 has an extending portion 138 that extends to the left of the electrode connection portion 31 in the width direction (left-right direction) of the busbar 30. The extending portion 138 is composed only of the second base material 33B. The extending portion 138 includes a wiring material connection portion 137 on its underside.

[0044] The wiring material 140 does not include the connection piece 44 of the first embodiment, but only includes a main body 43 extending in the front-rear direction. That is, the wiring material 140 extends in the front-rear direction in the wiring module 120. As shown in Fig. 8, a land portion 41A is formed in the main body 43. An extension portion 138 is disposed on the land portion 41A, and the land portion 41A and a wiring material connection portion 137 are connected by soldering or the like.

[0045] In this embodiment, the connection portion between busbar 130 and wiring 140 is formed by extension 138 instead of connection piece 44 of embodiment 1. This makes it possible to connect wiring 140 to wiring connection portion 137 with wiring 140 extending in the front-to-rear direction. That is, wiring 140 can be formed in a simple strip shape, making it easier to form wiring 140. Furthermore, extension 138 is made of base material 33, and is easier to increase in strength than connection piece 44. This improves the reliability of the connection between busbar 130 and wiring 140.

[0046] (Effects of the second embodiment) (2-1) In the wiring module 120 of embodiment 2, the laminated portion 132 has an extension portion 138 that extends outward from the electrode connection portions 31 in a third direction (left-right direction) that is perpendicular to both the first direction (front-back direction) in which the electrode connection portions 31 are arranged and the second direction (up-down direction) in which the electrode connection portions 31 and the electrode terminals 12 face each other, and the extension portion 138 has a wiring material connection portion 137.

[0047] With this configuration, even when the lead 140 extends in the first direction, the lead 140 and the lead connection portion 137 can be connected to each other.

[0048] (Other embodiments) The above-mentioned first and second embodiments can be modified as follows: The above-mentioned first and second embodiments and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0049] In the first and second embodiments, the bus bars 30, 130 are made of the first metal M1 and the second metal M2. However, the bus bars may be made of a single type of metal.

[0050] In the above-mentioned first and second embodiments, the plurality of base materials 33 includes the plurality of first base materials 33A and one second base material 33B, but the number of the first base materials and the second base materials included in the plurality of base materials can be changed as appropriate. In addition, the plurality of base materials may all be made of one kind of metal.

[0051] In the above-mentioned first and second embodiments, the laminated portion 32, 132 and the electrode connection portion 31 are connected by welding, but the laminated portion and the electrode connection portion may be electrically connected by being mechanically compressed and fixed.

[0052] In the first and second embodiments, the laminated portion 32, 132 has the main body portion 35 protruding from the overlapping portion 34. However, the main body portion 35 may be in the form of a flat plate that is substantially flush with the overlapping portion 34.

[0053] In the first and second embodiments, the slits 36 are formed in the laminated portions 32 and 132, but the slits do not necessarily have to be provided.

[0054] In the first embodiment, the wiring connection portion 37 is provided in the overlapping portion 34, but the wiring connection portion may be provided in the main body portion. In the above-described second embodiment, the extending portion 138 may extend from the main body portion 35, not limited to the overlapping portion 34, as long as the extending portion 138 extends outward beyond the electrode connection portion 31 in the third direction. In addition, the extending portion 138 may be formed from any of the base materials 33 constituting the laminated portion 33.

[0055] In the first and second embodiments, the wiring members 40 and 140 are flexible printed circuit boards, but the wiring members may be, for example, electric wires or flexible flat cables (FFCs). The wiring members may be electrically connected to the bus bars via terminals, metal pieces, or the like. For example, the wiring module of the present disclosure includes a wiring module 220 shown in FIG. 9. The wiring module 220 includes a bus bar 30, a wiring member 240, and a terminal 250. The wiring member 240 is an electric wire. The terminal 250 includes a terminal body 251 welded to the bus bar 30, a core wire crimping portion 252 crimped to a core wire of the electric wire, and an insulating coating crimping portion 253 crimped to an insulating coating of the electric wire. [Explanation of symbols]

[0056] 10: Energy storage module 11: Energy storage element 12: Electrode terminal 20: Wiring module 30: Busbar 31: Electrode connection part 31A: Main body 31B: Extension part 31C: Through hole 32: Laminated section 33: Base material 33A: 1st base material 33B: Second base material 34: Overlapping section 35: Main body 35A: Side 35B: Ceiling section 36: Slit 37: Wiring connection part 40: Wiring material 41: Conductor 41A: Land Department 42: Support member 43: Main body 44: Connection piece 120: Wiring module 130: Busbar 132: Laminated section 137: Wiring connection part 138: Extension part 140: Wiring material 220: Wiring module 240: Wiring material 250: Terminal 251: Terminal body 252: Wire crimping section 253: Insulation crimping part M1: 1st metal M2: Second metal

Claims

1. A wiring module that is attached to a plurality of energy storage elements having electrode terminals, A bus bar, A wiring material, the bus bar includes an electrode connection portion connected to the electrode terminal, and a laminate portion configured by laminating a plurality of plate-shaped base materials and connecting two adjacent electrode connection portions, The laminated portion includes a wiring member connection portion electrically connected to the wiring member.

2. the laminated portion includes an overlapping portion that overlaps with the electrode connection portion and is connected to the electrode connection portion, The wiring module according to claim 1 , wherein the overlapping portion includes the wiring material connection portion.

3. the electrode connection portion is made of a first metal, The plurality of substrates include at least one first substrate made of the first metal and at least one second substrate made of a second metal different from the first metal; the wiring member includes a conductor portion made of the second metal, the electrode connection portion is connected to the first substrate, The wiring module according to claim 1 , wherein the wiring member connection portion is formed of a second base material and is connected to the conductor portion.

4. the laminated portion includes an extending portion that extends outward beyond the electrode connection portions in a third direction perpendicular to both a first direction in which the electrode connection portions are arranged and a second direction in which the electrode connection portions and the electrode terminals face each other; The wiring module according to claim 1 , wherein the extending portion includes the wiring material connecting portion.

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