Wiring Module

Abstract

To provide a wiring module that simplifies configuration and reduces costs.SOLUTION: A wiring module 20 includes a busbar 40, an electric wire 30 including a core wire 31, and a fuse unit 50 connected to the busbar 40 and the core wire 31, the fuse unit 50 includes a first terminal unit 71 connected to the busbar 40, a second terminal unit 81 connected to the core wire 31, a fusing unit 91 connects the first terminal unit 71 and the second terminal unit 81 and melts due to overcurrent, and a case 100 covering the fusing unit 91, the first terminal unit 71 includes a first connection unit 74 having a contact surface 74A in contact with the busbar 40, and a first holding unit 73 arranged between the first connection unit 74 and the fusing unit 91 and held in the case 100, and the second terminal unit 81 includes a second connection unit 84 connected to the core wire 31, and a second holding unit 83 arranged between the second connection unit 84 and the fusing unit 91 and held in the case 100.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a wiring module. [Background technology]

[0002] Battery modules used in electric vehicles, hybrid vehicles, and the like are generally constructed by connecting a large number of cells via bus bars. The battery module is equipped with voltage detection wires connected to each cell via detection terminals. A fuse is connected to the voltage detection wires, and the fuse blows when an overcurrent flows.

[0003] One example of such a configuration includes a connecting conductor connected to an electrode, a relay terminal connected to an end portion of a voltage detection electric wire, a fusible element connecting the connecting conductor and the relay terminal, and a resin molded member covering the fusible element (see Patent Document 1). Another example includes a connecting terminal connected to the electrode and including a first terminal, a battery-side connector housing accommodating the first terminal, a wire-side connector housing connected to the end of the electric wire and fitted into the battery-side connector housing, and a fuse accommodated inside the wire-side connector housing and connected to the first terminal (see Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-097986 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-114956 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above configuration, a large number of components are required to attach the voltage detection wire and the fuse, which may complicate the configuration of the wiring module and increase manufacturing costs. [Means for solving the problem]

[0006] The wiring module disclosed in this specification is a wiring module attached to a plurality of energy storage elements having electrode terminals, and comprises: a connecting member connected to the electrode terminals; an electric wire having a core wire; and a fuse unit connected to the connecting member and the core wire, wherein the fuse unit comprises: a first terminal portion connected to the connecting member; a second terminal portion connected to the core wire; a fusing portion connecting the first terminal portion and the second terminal portion and fusing due to an overcurrent; and a case covering the fusing portion, wherein the first terminal portion comprises a first connecting portion having a contact surface that comes into contact with the connecting member; and a first retaining portion arranged between the first connecting portion and the fusing portion and held by the case, and the second terminal portion comprises a second connecting portion connected to the core wire; and a second retaining portion arranged between the second connecting portion and the fusing portion and held by the case. [Effects of the Invention]

[0007] According to the wiring module disclosed in this specification, the configuration can be simplified and the manufacturing cost can be reduced. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a partially enlarged plan view of an electricity storage module according to an embodiment. [Figure 2] FIG. 2 is a perspective view of the fuse unit according to the embodiment. [Figure 3] FIG. 3 is a perspective view of a fused terminal according to an embodiment. [Figure 4] FIG. 4 is a plan view of the fused terminal of the embodiment. [Figure 5] FIG. 5 is a front view of the fused terminal of the embodiment. [Figure 6] FIG. 6 is a perspective view of the case of the embodiment. [Figure 7] FIG. 7 is a side view of the case of the embodiment. [Figure 8] FIG. 8 is a cross-sectional view taken along line AA in FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line BB in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Outline of the embodiment] (1) The wiring module disclosed in this specification is a wiring module attached to a plurality of energy storage elements having electrode terminals, and includes: a connection member connected to the electrode terminals; an electric wire having a core wire; and a fuse unit connected to the connection member and the core wire. The fuse unit includes: a first terminal portion connected to the connection member; a second terminal portion connected to the core wire; a fusing portion connecting the first terminal portion and the second terminal portion and fusing due to an overcurrent; and a case covering the fusing portion. The first terminal portion includes a first connection portion having a contact surface that contacts the connection member; and a first holding portion arranged between the first connection portion and the fusing portion and held by the case. The second terminal portion includes a second connection portion connected to the core wire; and a second holding portion arranged between the second connection portion and the fusing portion and held by the case.

[0010] According to the wiring module having the above configuration, the configuration can be simplified and costs can be reduced.

[0011] (2) In the wiring module of (1) above, the fuse unit may include a wire pressing portion connected to the second connection portion and pressing the wire.

[0012] With this configuration, it is possible to prevent the electric wire from falling off from the second connection portion.

[0013] (3) In the wiring module of (1) or (2) above, the case may have an adjacent surface adjacent to the contact surface, and the adjacent surface may be flush with the contact surface or recessed from the contact surface.

[0014] According to this configuration, when the first connection portion is connected to the connection member, the case does not interfere with the connection member, and the connection member and the fuse unit can be smoothly connected.

[0015] (4) In the wiring module described in any one of (1) to (3) above, the case may have a first insertion portion into which the first holding portion is inserted and a second insertion portion into which the second holding portion is inserted.

[0016] According to this configuration, the first holding portion and the second holding portion can be stably held in the case, and the fusing portion disposed between the first holding portion and the second holding portion can be reliably protected.

[0017] (5) In the wiring module described in any one of (1) to (4) above, the first retaining portion may have a first engagement hole that engages with the case, and the second retaining portion may have a second engagement hole that engages with the case.

[0018] According to this configuration, the first holding portion and the second holding portion can be fixed to the case with a simple configuration.

[0019] (6) In the wiring module described in any one of (1) to (5) above, the connection member may be a bus bar having a first electrode connection portion connected to one of the electrode terminals and a second electrode connection portion connected to another of the electrode terminals adjacent to the one of the electrode terminals, and the fuse unit may be arranged in a direction such that the alignment direction of the first terminal portion and the second terminal portion is perpendicular to the alignment direction of the first electrode connection portion and the second electrode connection portion.

[0020] With this configuration, it is possible to prevent the fuse unit from protruding from the bus bar and interfering with other adjacent bus bars, thereby increasing the degree of freedom in designing the fuse unit.

[0021] [Details of the embodiment] Specific examples of the technology disclosed in this specification will be described below with reference to the drawings. Note that the present invention 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.

[0022] [Overall configuration] An embodiment will be described with reference to Fig. 1 to Fig. 9. A wiring module 20 of the present embodiment is used by being connected to a plurality of energy storage elements 10 in an energy storage module 1 used as a drive source for a vehicle such as an electric vehicle or a hybrid vehicle.

[0023] [Electricity storage element 10] The energy storage elements 10 are, for example, secondary batteries. Each energy storage element 10 has a flat rectangular parallelepiped shape overall, and as shown in FIG. 1, includes two electrode terminals 11A, 11B arranged on one surface. One of the two electrode terminals 11A, 11B is a positive terminal 11A, and the other is a negative terminal 11B. The multiple energy storage elements 10 are arranged in a row. Two adjacent energy storage elements 10 are arranged so that the electrode terminals 11A, 11B of opposite polarities are adjacent to each other, that is, so that the positive terminal 11A of one energy storage element 10 and the negative terminal 11B of the adjacent energy storage element 10 are adjacent to each other.

[0024] [Wiring module 20] As shown in FIG. 1, the wiring module 20 includes a plurality of electric wires 30, a plurality of bus bars 40 (an example of a connection terminal), a plurality of fuse units 50, and a holding member 110 that holds these components.

[0025] [Wire 30] As shown in FIG. 1 , the electric wire 30 includes a core wire 31 formed of a single-core wire or a twisted wire formed by twisting together a plurality of metal wires, and an insulating coating 32 made of synthetic resin that covers the core wire 31. Examples of materials for the core wire 31 include copper, copper alloy, aluminum, and aluminum alloy. The core wire 31 has a portion that is exposed from the insulating coating 32 at the terminal end of the electric wire 30. The other end of the electric wire 30 is connected to an external ECU (Electronic Control Unit) via, for example, a connector. The ECU is equipped with a microcomputer, elements, and the like, and has a well-known configuration that has functions for detecting the voltage, current, temperature, etc. of each energy storage element 10 and controlling the charging and discharging of each energy storage element 10.

[0026] [Busbar 40] The bus bar 40 is made of a metal and is conductive. Examples of materials for the bus bar 40 include copper, a copper alloy, aluminum, an aluminum alloy, and stainless steel (SUS). As shown in FIG. 1, the bus bar 40 has an overall rectangular plate shape, and one end thereof serves as a first electrode connection portion 41 connected to the positive terminal 11A of one energy storage element 10, and the other end thereof serves as a second electrode connection portion 42 connected to the negative terminal 11B of another energy storage element 10 adjacent to the first energy storage element 10. The other surface of the bus bar 40 (the upper surface in FIG. 8) opposite to the surface connected to the positive terminal 11A and the negative terminal 11B forms a flat surface 40A.

[0027] [Fuse Unit 50] As shown in FIG. 2, the fuse unit 50 includes a fused terminal 60 and a case 100.

[0028] [Fused terminal 60] The fused terminal 60 is made of metal and, as shown in Figures 3, 4 and 5, has a first terminal portion 71 connected to the bus bar 40, a second terminal portion 81 connected to the electric wire 30, and a fusion portion 91 connecting the first terminal portion 71 and the second terminal portion 81.

[0029] The first terminal portion 71 and the second terminal portion 81 each have a rectangular plate shape. The first terminal portion 71 and the second terminal portion 81 are arranged in parallel, with the first terminal portion 71 having a first opposing edge 72 facing the second terminal portion 81, and the second terminal portion 81 having a second opposing edge 82 facing the first terminal portion 71.

[0030] The portion of the first terminal portion 71 adjacent to the first opposing edge 72 constitutes a first holding portion 73, and the remaining portion, which is disposed on the opposite side of the first holding portion 73 from the second terminal portion 81, constitutes a first connecting portion 74 that is connected to the bus bar 40. One surface of the first connecting portion 74 (the lower surface in FIGS. 5, 8, and 9) constitutes a flat contact surface 74A that contacts the flat surface 40A of the bus bar 40. The first connecting portion 74 is connected to the bus bar 40 by, for example, laser welding or mechanical clinching. The first holding portion 73 has a smaller thickness than the first connecting portion 74. The first holding portion 73 has a plurality of first engagement holes 75 (two in this embodiment). The first terminal portion 71 has an engagement protrusion 76 that protrudes from the first opposing edge 72 toward the second terminal portion 81.

[0031] The portion of the second terminal portion 81 adjacent to the second opposing edge 82 constitutes a second holding portion 83, and the remaining portion arranged on the opposite side of the first terminal portion 71 relative to the second holding portion 83 constitutes a second connecting portion 84 that is connected to the core wire 31. The second holding portion 83 is thinner than the second connecting portion 84. The second holding portion 83 has a plurality of (two in this embodiment) second engaging holes 85. The second terminal portion 81 has an engaging protrusion 86 that protrudes from the second opposing edge 82 toward the first terminal portion 71.

[0032] The fusing portion 91 has a thin rod shape, and one end is connected to the first opposing edge 72 and the other end is connected to the second opposing edge 82. The fusing portion 91 extends between the first opposing edge 72 and the second opposing edge 82, snaking in a generally S-shape.

[0033] Fusing portion 91 is designed to fuse when an overcurrent exceeding a predetermined fusing current flows. The material of fusing portion 91 is preferably a metal with a conductivity of 10-50% IACS and a low melting point, such as zinc alloy, phosphor bronze, or aluminum alloy. For example, if fused terminal 60 is made of a zinc alloy and the fusing current is set to 4 amperes, it is desirable that fusing portion 91 have a resistance of 10 mΩ, a thickness of 0.2 mm, a width of 0.2 mm, and a length of approximately 10 mm.

[0034] [Case 100] The case 100 is a member that is attached to the fused terminal 60 to protect the fusing portion 91. The case 100 is made of synthetic resin, and as shown in Figures 6, 7, and 9, includes a lower plate portion 101, an upper plate portion 102 that is disposed opposite the lower plate portion 101, a connecting portion 105 that connects the lower plate portion 101 and the upper plate portion 102, and a retaining plate portion 106 that extends from the upper plate portion 102.

[0035] The lower plate 101 has a rectangular, flat plate shape. The upper plate 102 includes a first clamping portion 103A and a second clamping portion 103B that are arranged parallel to the lower plate 101 with a gap therebetween, and an intermediate portion 104 that is arranged between the first clamping portion 103A and the second clamping portion 103B. The first clamping portion 103A is arranged along one side edge of the lower plate 101, and the second clamping portion 103B is arranged along the other side edge of the lower plate 101. The intermediate portion 104 includes two side walls 104A and 104B that extend from the first clamping portion 103A and the second clamping portion 103B, respectively, toward the opposite side of the lower plate 101 (the upper side in FIG. 9), and a top wall 104C that connects the two side walls 104A and 104B.

[0036] The distance between lower plate portion 101 and first clamping portion 103A is equal to or slightly larger than the plate thickness of first holding portion 73, and the gap between lower plate portion 101 and first clamping portion 103A forms first insertion portion 107A that can accommodate first holding portion 73. Similarly, the distance between lower plate portion 101 and second clamping portion 103B is equal to or slightly larger than the plate thickness of second holding portion 83, and the gap between lower plate portion 101 and second clamping portion 103B forms second insertion portion 107B that can accommodate second holding portion 83. The space surrounded by middle portion 104 and lower plate portion 101 forms fuse accommodating space S that communicates with first insertion portion 107A and second insertion portion 107B.

[0037] The connecting portion 105 is a wall that connects one end of the upper plate portion 102 and one end of the lower plate portion 101. The retaining plate portion 106 is plate-shaped and extends from the other end of the upper plate portion 102 opposite the connecting portion 105. The retaining plate portion 106 is rotatable around a connection position with the upper plate portion 102 as a base end, and extends toward the lower plate portion 101. The retaining plate portion 106 is displaceable between a closed position (position shown by a solid line in FIG. 7) in which it closes the opening in the fuse accommodating space S on the opposite side from the connecting portion 105, and an open position (position shown by a two-dot chain line in FIG. 7) in which it extends in a direction parallel to the lower plate portion 101 and opens the opening in the fuse accommodating space S on the opposite side from the connecting portion 105.

[0038] [Assembly of fuse-equipped terminal 60 and case 100] When assembling the fused terminal 60 to the case 100, with the retaining plate 106 in the open position, the first holding portion 73 is inserted into the first insertion portion 107A and the second holding portion 83 is inserted into the second insertion portion 107B. Once the insertion is complete, the retaining plate 106 is moved to the closed position. When the retaining plate 106 is in the closed position, as shown in FIG. 2, the two engaging protrusions 76, 86 engage with the retaining plate 106, preventing the retaining plate 106 from being unintentionally displaced to the open position.

[0039] As shown in FIG. 9 , when the case 100 is attached to the fused terminal 60, the first holding portion 73, the second holding portion 83, and the fusing portion 91 are disposed between the lower plate portion 101 and the upper plate portion 102. The first holding portion 73 is housed in the first insertion portion 107A, and the second holding portion 83 is housed in the second insertion portion 107B. The first connecting portion 74 and the second connecting portion 84 are exposed to the outside from the case 100. The first connecting portion 74 and the second connecting portion 84 protrude from opposite sides of the case 100. A relatively large fuse accommodating space S is present inside the case 100, surrounded by the middle portion 104 and the lower plate portion 101, and most of the fusing portion 91 is disposed within this fuse accommodating space S. This minimizes contact of the fusing portion 91 with the case 100.

[0040] After the case 100 is assembled to the fused terminal 60, for example, the surface of the first clamping portion 103A is pressed with a pin, causing a portion of the first clamping portion 103A to plastically deform, forming protrusions that enter the interior of each of the two first engagement holes 75 of the first holding portion 73. This fixes the first holding portion 73 to the case 100. Similarly, the surface of the second clamping portion 103B is pressed with a pin, causing protrusions that enter the interior of each of the two second engagement holes 85 of the second holding portion 83, thereby fixing the second holding portion 83 to the case 100.

[0041] The thickness of the first connecting portion 74 is greater than that of the first holding portion 73 by the thickness of the lower plate portion 101. As a result, as shown in Figures 8 and 9, the outer surface (adjacent surface 101A) of the lower plate portion 101 adjacent to the contact surface 74A is flush with the contact surface 74A.

[0042] [Holding member 110] Holding member 110 is made of synthetic resin, and as shown in FIG. 1, includes busbar holding portions 111 that respectively hold a plurality of busbars 40, and electric wire routing portion 112 in which electric wires 30 are routed.

[0043] [Method of manufacturing the energy storage module 1] Next, an example of a method for manufacturing the energy storage module 1 configured as described above will be described. First, in each of the multiple fuse units 50, the first connection portion 74 exposed from the case 100 is placed on each of the multiple bus bars 40. At this time, as shown in FIG. 8 , the contact surface 74A is placed in contact with the flat surface 40A. In this state, the bus bar 40 and the first connection portion 74 are connected by, for example, laser welding. At this time, the contact surface 74A and the adjacent surface 101A are flush with each other, so that the case 100 does not interfere with the bus bar 40, and the bus bar 40 and the first connection portion 74 can be smoothly connected.

[0044] Next, the multiple bus bars 40 connected to the fuse units 50 are set in the bus bar holding portions 111 of the holding member 110. Next, the multiple electric wires 30 are routed in the electric wire routing portion 112 of the holding member 110, and the core wire 31 exposed at the end of each electric wire 30 is placed on the second connection portion 84 of each fuse unit 50. In this state, the core wire 31 is connected to the second connection portion 84 by soldering using, for example, a robot soldering device. In this manner, the manufacture of the wiring module 20 is completed.

[0045] 1 , when the fuse unit 50 is connected to the bus bar 40, the arrangement direction of the first terminal portion 71 and the second terminal portion 81 of the fuse unit 50 is orthogonal to the arrangement direction of the first electrode connection portion 41 and the second electrode connection portion 42. Here, if the fuse unit 50 is attached so that the arrangement direction of the first terminal portion 71 and the second terminal portion 81 is along the arrangement direction of the first electrode connection portion 41 and the second electrode connection portion 42, the width of the fused terminal 60 (the distance between the side edge of the first terminal portion 71 opposite the second terminal portion 81 and the side edge of the second terminal portion 81 opposite the first terminal portion 71) must be set so that the fused terminal 60 does not protrude from the bus bar 40 and interfere with other adjacent bus bars 40, which imposes certain restrictions on the design of the fuse unit 50. However, when the arrangement direction of the first terminal portion 71 and the second terminal portion 81 of the fuse unit 50 is perpendicular to the arrangement direction of the first electrode connection portion 41 and the second electrode connection portion 42, even if the fuse unit 50 protrudes from the bus bar 40, it will protrude to a side different from the side on which the other adjacent bus bars 40 are arranged (the right side in Figure 1), so that the fuse unit 50 can be prevented from interfering with the other bus bars 40, and the design freedom of the fuse unit 50 is increased.

[0046] Next, wiring module 20 is placed at a predetermined position on the aligned energy storage elements 10. In this state, electrode terminals 11A, 11B are connected to bus bars 40 by, for example, laser welding. In this manner, the manufacture of energy storage module 1 is completed.

[0047] [Action and effect] As described above, according to the present embodiment, the wiring module 20 attached to a plurality of energy storage elements 10 each having electrode terminals 11A, 11B includes the bus bar 40 connected to the electrode terminals 11A, 11B, the electric wire 30 including the core wire 31, and the fuse unit 50 connected to the bus bar 40 and the core wire 31. The fuse unit 50 includes a first terminal portion 71 connected to the bus bar 40, a second terminal portion 81 connected to the core wire 31, and a fuse unit 50 connected to the first terminal portion 71 and the second terminal portion 81. and a fusing portion 91 that fuses due to an overcurrent, and a case 100 that covers the fusing portion 91; the first terminal portion 71 comprises a first connecting portion 74 having a contact surface 74A that comes into contact with the bus bar 40, and a first holding portion 73 that is arranged between the first connecting portion 74 and the fusing portion 91 and is held by the case 100; and the second terminal portion 81 comprises a second connecting portion 84 that connects with the core wire 31, and a second holding portion 83 that is arranged between the second connecting portion 84 and the fusing portion 91 and is held by the case 100.

[0048] According to the wiring module 20 configured as above, the configuration of the fuse unit 50 can be simplified, and costs can be reduced.

[0049] Furthermore, the fuse unit 50 includes a wire pressing portion 77 that is connected to the second connection portion 84 and presses the wire 30. With this configuration, the wire 30 can be prevented from falling off from the second connection portion 84.

[0050] Furthermore, case 100 has adjacent surface 101A adjacent to contact surface 74A, and adjacent surface 101A is flush with contact surface 74A. With this configuration, case 100 does not interfere with bus bar 40 when connecting first connection portion 74 to bus bar 40, and bus bar 40 and fuse unit 50 can be connected smoothly.

[0051] Furthermore, case 100 has first insertion portion 107A into which first holding portion 73 is inserted, and second insertion portion 107B into which second holding portion 83 is inserted. With this configuration, first holding portion 73 and second holding portion 83 can be stably held in case 100, and fusing portion 91 disposed between first holding portion 73 and second holding portion 83 can be reliably protected.

[0052] Furthermore, first retaining portion 73 has first engagement hole 75 that engages with case 100, and second retaining portion 83 has second engagement hole 85 that engages with case 100. With this configuration, first retaining portion 73 and second retaining portion 83 can be fixed to case 100 with a simple configuration.

[0053] Furthermore, the bus bar 40 includes a first electrode connection portion 41 connected to the positive electrode terminal 11A and a second electrode connection portion 42 connected to the negative electrode terminal 11B adjacent to the positive electrode terminal 11A, and the fuse unit 50 is arranged such that the alignment direction of the first terminal portion 71 and the second terminal portion 81 is perpendicular to the alignment direction of the first electrode connection portion 41 and the second electrode connection portion 42. This configuration prevents the fuse unit 50 from protruding from the bus bar 40 and interfering with other adjacent bus bars 40, thereby increasing the degree of freedom in designing the fuse unit 50.

[0054] <Other embodiments> (1) In the above embodiment, the connecting member is the bus bar 40. However, the connecting member may include a bus bar and a relay terminal connected to the bus bar, and the first terminal portion may be connected to the relay terminal. (2) In the above embodiment, the first terminal portion 71 and the second terminal portion 81 are each shaped like a rectangular plate, but the shapes of the first terminal portion and the second terminal portion are not limited to those in the above embodiment. For example, the second terminal portion may have a crimping portion for crimping the core wire. (3) In the above embodiment, the fusing portion 91 snakes in an S-shape, but the fusing portion may be, for example, V-shaped, U-shaped, crank-shaped, or linear. (4) The manner in which the case 100 is fixed to the first retaining portion 73 and the second retaining portion 83 is not limited to the above embodiment. For example, the case may be fixed to the first retaining portion and the second retaining portion by thermal crimping, in which the case is heated and pressurized to thermally deform it, thereby forming protrusions that enter the engagement holes of the first retaining portion and the second retaining portion. (5) In the above embodiment, the adjacent surface 101A of the case 100 is flush with the contact surface 74A. However, the adjacent surface of the case may be recessed from the contact surface. [Explanation of symbols]

[0055] 1: Energy storage module 10: Energy storage element 11A: Positive terminal (electrode terminal) 11B: Negative terminal (electrode terminal) 20: Wiring module 30: Electric wire 31: Core wire 32: Insulation coating 40: Bus bar (connecting member) 40A: Flat surface 41: First electrode connection part 42: Second electrode connection part 50: Fuse unit 60: Fused terminal 71: 1st terminal part 72: First opposing edge 73: 1st holding part 74: First connection part 74A: Contact surface 75: First engagement hole 76: Engagement protrusion 81:Second terminal part 82: Second opposing edge 83:Second holding part 84: Second connection part 85: Second engagement hole 86: Engagement protrusion 91:Fusing part 100: Case 101: Lower plate part 101A: Adjacent surface 102: Upper plate 103A: First clamping part 103B: Second clamping part 104: Middle section 104A, 104B: Side wall part 104C: Ceiling wall part 105: Connection part 106: Stop plate 107A: First insertion part 107B: Second insertion part 110: Holding member 111: Busbar holding part 112: Wire routing section S: Fuse storage space

Claims

1. A wiring module attached to a plurality of energy storage elements each having an electrode terminal, a connection member connected to the electrode terminal; an electric wire having a core wire; a fuse unit connected to the connection member and the core wire, The fuse unit is a first terminal connected to the connecting member; a second terminal connected to the core wire; a fusing portion connecting the first terminal and the second terminal and fusing due to an overcurrent; and a case covering the fusing portion; the first terminal portion includes a first connection portion having a contact surface that contacts the connection member, and a first holding portion that is disposed between the first connection portion and the fusing portion and is held by the case, the second terminal portion includes a second connection portion connected to the core wire, and a second holding portion disposed between the second connection portion and the fusing portion and held by the case, the connecting member is a bus bar including a first electrode connection portion connected to one of the electrode terminals and a second electrode connection portion connected to another of the electrode terminals adjacent to the one of the electrode terminals, The wiring module, wherein the first terminal portion, the fusing portion, and the second terminal portion are arranged side by side in a direction perpendicular to an arrangement direction of the first electrode connection portion and the second electrode connection portion.

2. The wiring module according to claim 1 , wherein the fuse unit includes a wire pressing portion connected to the second connection portion and pressing the wire.

3. 3. The wiring module according to claim 1, wherein the case has an adjacent surface adjacent to the contact surface, the adjacent surface being flush with the contact surface or recessed from the contact surface.

4. The wiring module according to claim 1 , wherein the case has a first insertion portion into which the first holding portion is inserted and a second insertion portion into which the second holding portion is inserted.

5. The wiring module according to claim 1 , wherein the first holding portion has a first engagement hole that engages with the case, and the second holding portion has a second engagement hole that engages with the case.

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