Conductive module

Abstract

To provide a conductive module capable of protecting a solder connection portion of an electrical connection component.SOLUTION: A conductive module includes: a bus bar 10; a wiring component 20 that electrically connects the bus bar to a battery monitoring unit; an electrical connection component 30 that solders a first electrode to a first electrical connection portion 10a on a bus bar side and solders a second electrode to a second electrical connection portion 20a of a wiring terminal 20B of the wiring component; and an insulating member 50 that encloses the electrical connection component, the first electrical connection portion, and the second electrical connection portion. The electrical connection component is a chip component 30A including the first electrode and the second electrode and is installed across the first electrical connection portion and the second electrical connection portion disposed to face each other with a gap therebetween. The insulating member is a molded body insert-molded while enclosing the electrical connection component, the first electrical connection portion, and the second electrical connection portion. The first electrical connection portion and the second electrical connection portion have locked portions 42, 24 respectively, which each are in close contact with the insulating member inside and locked to the insulating member in a facing disposition direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a conductive module. [Background technology]

[0002] A conductive module electrically connects a plurality of battery cells arranged in an array using a plurality of bus bars. The conductive module electrically connects each bus bar to a battery monitoring unit that monitors the battery state of the battery cells using wiring components such as electric wires. This type of conductive module is disclosed, for example, in Patent Document 1 listed below. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-119651 Summary of the Invention [Problem to be solved by the invention]

[0004] In some conductive modules, electrical connection components are soldered to the bus bar and the wiring component, respectively, to physically and electrically connect the bus bar and the wiring component. Examples of such electrical connection components include chip components such as chip fuses that have a fusible portion that melts when an overcurrent flows, and circuit components such as pattern fuses in which a wiring pattern having a fusible portion is provided on a printed circuit board. In such conductive modules, forces acting in different directions between the bus bar and the wiring component may act on the soldered connection of the electrical connection components, potentially reducing the electrical conductivity of the soldered connection.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a conductive module that can protect the soldered connections of electrical connection components. [Means for solving the problem]

[0006] the electrical connection component is a chip component having the first electrode and the second electrode, or a circuit component having a wiring pattern including the first electrode and the second electrode, and is disposed across the first electrical connection portion and the second electrical connection portion, the electrical connection component being disposed opposite to each other with a gap therebetween; and the insulating member is a molded body formed by insert molding that includes the electrical connection component, the first electrical connection portion, and the second electrical connection portion, or a hardened body formed by hardening a potting liquid that includes the electrical connection component, the first electrical connection portion, and the second electrical connection portion. The first electrical connection portion and the second electrical connection portion are in close contact with the insulating member inside, and each have a locked portion that is locked to the insulating member in the opposing arrangement direction. [Effects of the Invention]

[0007] In the conductive module according to the present invention, the respective locking portions can be locked within the insulating member. Therefore, in this conductive module, when a load acts on the bus bar side or the wiring terminals, moving them toward or away from each other, the force is transmitted from the locking portions to the insulating member, which then receives the force. This reduces the transmission of the force to the electrical connection components compared to a case in which no locking portions are provided. Therefore, in the conductive module according to the present invention, the load applied to the solder connection between the first electrode of the electrical connection component and the first electrical connection portion on the bus bar side, and the solder connection between the second electrode of the electrical connection component and the second electrical connection portion on the wiring terminal, can be reduced, thereby protecting each solder connection. Therefore, this conductive module can maintain electrical conductivity between the first electrode and the first electrical connection portion and between the second electrode and the second electrical connection portion. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a conductive module according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing the conductive module of the embodiment. [Figure 3] FIG. 3 is a schematic diagram showing a battery module together with a bus bar. [Figure 4] FIG. 4 is a perspective view of a conductive module illustrating a modified embodiment of the electrical connection part. [Figure 5] FIG. 5 is an exploded perspective view of a conductive module illustrating a modified embodiment of the electrical connection part. [Figure 6] FIG. 6 is a perspective view showing a conductive module of the first modification. [Figure 7] FIG. 7 is an exploded perspective view showing the conductive module of the first modification. [Figure 8] FIG. 8 is a perspective view showing a conductive module according to the second modification. [Figure 9] FIG. 9 is an exploded perspective view showing the conductive module of the second modification. [Figure 10] FIG. 10 is a perspective view illustrating the notch. [Figure 11] FIG. 11 is a perspective view showing a conductive module according to the third modification. [Figure 12] FIG. 12 is an exploded perspective view showing a conductive module according to the third modification. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a conductive module according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to this embodiment.

[0010] [Embodiment] One embodiment of a conductive module according to the present invention will be described with reference to FIGS.

[0011] Reference numeral 1 in Figures 1 and 2 indicates a conductive module of this embodiment. This conductive module 1 is assembled to a battery module BM (Figure 3) in which a plurality of battery cells BC are arranged (for example, arranged in a single row), and electrically connects the plurality of battery cells BC in this battery module BM. This conductive module 1 also electrically connects the battery module BM to a battery monitoring unit (not shown), allowing the battery monitoring unit to monitor the battery state of the battery cells BC. This conductive module 1, together with the battery module BM, constitutes a battery pack. The battery pack is mounted, for example, on a vehicle (such as a BEV (Battery Electric Vehicle) or HEV (Hybrid Electric Vehicle) that has a rotating machine as its driving source, and is used to supply power to the rotating machine.

[0012] Each battery cell BC includes a cell body BCa and positive and negative electrode terminals BCb (FIG. 3). The battery cell BC shown here has a cell body BCa formed in a rectangular shape with six outer wall surfaces. In the battery module BM, adjacent cell bodies BCa in the arrangement direction are arranged with one outer wall surface facing each other. This battery module BM includes one electrode terminal group BCc in which one electrode terminal BCb of each battery cell BC is arranged along the arrangement direction, and another electrode terminal group BCc in which the other electrode terminals BCb of each battery cell BC are arranged along the arrangement direction (FIG. 3).

[0013] In this example, each battery cell BC has a positive and negative electrode terminal BCb on one of the six outer wall surfaces of the cell body BCa (FIG. 3). Therefore, in the battery module BM, two electrode terminal groups BCc are provided on one plane (FIG. 3).

[0014] The electrode terminal BCb shown here is formed in a flat plate shape and is physically and electrically connected to the bus bar 10 (described later) by welding or the like (FIG. 3). However, the electrode terminal BCb may be formed in a pole column shape with a male screw portion. In this case, the bus bar 10 is fixed to the electrode terminal BCb by screwing a female screw member into the male screw portion of the electrode terminal BCb.

[0015] The conductive module 1 includes bus bars 10 that are physically and electrically connected to the electrode terminals BCb of the battery cells BC that make up the battery module BM (FIGS. 1 to 3).

[0016] The busbar 10 is made of a conductive material such as metal. The busbar 10 is a metal, plate-shaped conductive component, and is formed by press-molding a metal plate as a base material, for example. The busbar 10 shown here is formed in a rectangular, flat plate shape.

[0017] The conductive module 1 includes, as the busbars 10, one that is physically and electrically connected to adjacent electrode terminals BCb of a pair of battery cells BC in the battery module BM, one that is physically and electrically connected to the electrode terminal BCb that serves as the total negative electrode in the battery module BM, and one that is physically and electrically connected to the electrode terminal BCb that serves as the total positive electrode in the battery module BM.

[0018] The conductive module 1 includes a wiring component 20 that electrically connects the busbar 10 to the battery monitoring unit (FIGS. 1 and 2). The conductive module 1 also includes an electrical connection component 30 that is interposed between the busbar 10 and the wiring component 20 (FIGS. 1 and 2). In the conductive module 1, the electrical connection component 30 is physically and electrically connected to an electrical connection portion 10a on the busbar 10 side (hereinafter referred to as a "first electrical connection portion") and an electrical connection portion 20a on the wiring component 20 side (hereinafter referred to as a "second electrical connection portion"), and the busbar 10 and the battery monitoring unit are electrically connected via the electrical connection component 30. In the conductive module 1, the wiring component 20 and the electrical connection component 30 are provided for each busbar 10.

[0019] The wiring component 20 includes an electric wire (hereinafter referred to as a "wiring electric wire") 20A (FIGS. 1 and 2) in which a core wire 21 is covered with an insulating coating 22. In this wiring electric wire 20A, the core wire 21 is exposed at its end in a state where it protrudes from the insulating coating 22. Hereinafter, this exposed portion of the core wire 21 will be referred to as an exposed core wire portion 21a.

[0020] The wiring component 20 includes a terminal fitting (hereinafter referred to as a "wiring terminal") 20B that is physically and electrically connected to the exposed core wire portion 21a (FIGS. 1 and 2). In the wiring component 20, the wiring terminal 20B is provided with a second electrical connection portion 20a.

[0021] The wiring terminal 20B is made of a conductive material such as metal. The wiring terminal 20B has a wire connection portion 23 that is physically and electrically connected to the exposed core portion 21a of the wiring electric wire 20A (FIGS. 1 and 2). The wiring terminal 20B shown here is formed as a terminal fitting extending in one direction, with one longitudinal end thereof serving as the second electrical connection portion 20a and the other longitudinal end thereof serving as the wire connection portion 23. One longitudinal end of the wiring terminal 20B is formed in a rectangular flat plate shape. The wire connection portion 23 shown here is formed as a crimp terminal portion that is crimped onto the exposed core portion 21a.

[0022] The electrical connection part 30 includes a first electrode and a second electrode. In the electrical connection part 30, the first electrode is soldered to the first electrical connection part 10a on the busbar 10 side, and the second electrode is soldered to the second electrical connection part 20a of the wiring terminal 20B.

[0023] The electrical connection component 30 of this embodiment is a chip component 30A having a first electrode and a second electrode. For example, this chip component 30A is a chip fuse having a fusible portion that melts when an overcurrent flows, a first electrode provided on one end side of the fusible portion, and a second electrode provided on the other end side of the fusible portion.

[0024] The conductive module 1 of this embodiment includes a conductive member (hereinafter referred to as a "busbar side conductive member") 40 that is interposed between the busbar 10 and the electrical connection component 30 and physically and electrically connects the busbar 10 to a first electrode of the electrical connection component 30 (FIGS. 1 and 2). A first electrical connection portion 10a on the busbar 10 side is provided on the busbar side conductive member 40. In the conductive module 1, a busbar side conductive member 40 is provided for each busbar 10.

[0025] The bus bar side conductive member 40 is formed from a conductive material such as metal. For example, the bus bar side conductive member 40 is formed as a terminal fitting. The bus bar side conductive member 40 shown here is formed as a flat terminal fitting extending in one direction, with one longitudinal end serving as a first electrical connection portion 10a and the other longitudinal end serving as a bus bar connection portion 41 that physically and electrically connects to the bus bar 10 (FIGS. 1 and 2). Here, the bus bar side conductive member 40 is formed in a rectangular flat plate shape.

[0026] The busbar side conductive member 40 physically and electrically connects the busbar connection portion 41 to the busbar 10 with its first electrical connection portion 10a protruding from the busbar 10 in a direction perpendicular to the arrangement direction of the plurality of battery cells BC. In the conductive module 1, the busbar connection portion 41 and the busbar 10 are physically and electrically connected by welding or the like. Note that the busbar side conductive member 40 may also be configured to physically and electrically connect the busbar connection portion 41 and the busbar 10 by screw fastening. Furthermore, the busbar side conductive member 40 may have the busbar connection portion 41 formed as a female terminal portion or a male terminal portion, and the busbar connection portion 41 may be configured to be mated with the male terminal portion or the female terminal portion of the busbar 10.

[0027] The first electrical connection portion 10a on the busbar 10 and the second electrical connection portion 20a of the wiring terminal 20B are arranged opposite each other with a gap therebetween. The electrical connection component 30 is installed straddling the first electrical connection portion 10a and the second electrical connection portion 20a. Here, the second electrical connection portion 20a of the wiring terminal 20B is arranged with a gap between it and the first electrical connection portion 10a of the busbar-side conductive member 40 in a direction perpendicular to the arrangement direction of the multiple battery cells BC. The electrical connection component 30 straddles the first electrical connection portion 10a and the second electrical connection portion 20a above the gap. In the electrical connection component 30, a first electrode is soldered to the first electrical connection portion 10a, and a second electrode is soldered to the second electrical connection portion 20a.

[0028] The conductive module 1 includes an insulating member 50 that surrounds the electrical connection component 30, the first electrical connection portion 10a, and the second electrical connection portion 20a to maintain their connection (FIG. 1). The insulating member 50 is molded from an insulating material such as synthetic resin. For example, the insulating member 50 is a molded body that is insert-molded to encapsulate the electrical connection component 30, the first electrical connection portion 10a, and the second electrical connection portion 20a, or a hardened body that is obtained by hardening a potting liquid that encapsulates the electrical connection component 30, the first electrical connection portion 10a, and the second electrical connection portion 20a.

[0029] The first electrical connection portion 10a and the second electrical connection portion 20a are in close contact with the insulating member 50 inside, and each have a locked portion 42, 24 that is locked to the insulating member 50 in the opposing arrangement direction (FIGS. 1 and 2). The locked portions 42, 24 are through holes provided in the first electrical connection portion 10a and the second electrical connection portion 20a, respectively. In the locked portions 42, 24, the through holes are filled with a portion of the insulating member 50.

[0030] The locked portions 42, 24 shown here are arranged in the direction in which the first electrical connection portion 10a and the second electrical connection portion 20a face each other, with the electrical connection part 30 placed between them. Each of the locked portions 42, 24 shown here is formed as a circular through-hole.

[0031] In this conductive module 1, a portion of the insulating member 50 is filled in a solidified state in each of the locked portions 42, 24, and the locked portions 42, 24 can be locked by the insulating member 50 inside each of the locked portions 42, 24. Therefore, in this conductive module 1, when a load acts on the bus bar side conductive member 40 or the wiring terminal 20B, causing them to move toward or away from each other, the force is transmitted from the locked portions 42, 24 to the insulating member 50 therein, and this force is received by the insulating member 50 inside the locked portions 42, 24, so that transmission of the force to the electrical connection part 30 can be suppressed compared to when the locked portions 42, 24 are not provided. Therefore, in the conductive module 1 of this embodiment, the load applied to the solder connection between the first electrode of the electrical connection component 30 and the first electrical connection portion 10a of the bus bar side conductive member 40 and the solder connection between the second electrode of the electrical connection component 30 and the second electrical connection portion 20a of the wiring terminal 20B can be kept low, thereby protecting each solder connection. Therefore, the conductive module 1 can maintain the electrical conductivity between the first electrode and the first electrical connection portion 10a and between the second electrode and the second electrical connection portion 20a.

[0032] Here, the electrical connection component 30 may be a circuit component 30B provided with a wiring pattern having a first electrode and a second electrode. For example, this circuit component 30B is a pattern fuse in which a wiring pattern 31 is provided on a printed circuit board (flexible printed circuit board or rigid board). The wiring pattern 31 is provided with a first electrode 31a that is physically and electrically connected to the first electrical connection portion 10a of the bus bar side conductive member 40 and a second electrode 31b that is physically and electrically connected to the second electrical connection portion 20a of the wiring terminal 20B (FIGS. 4 and 5). The wiring pattern 31 is provided with a fusible portion 31c between the first electrode 31a and the second electrode 31b (FIGS. 4 and 5).

[0033] In this conductive module 1, for example, the first electrical connection portion 10a of the bus bar side conductive member 40 and the second electrical connection portion 20a of the wiring terminal 20B are placed on the first electrode 31a and the second electrode 31b of the circuit component 30B, respectively, and the circuit component 30B is soldered to the first electrical connection portion 10a and the second electrical connection portion 20a to establish a physical and electrical connection.

[0034] [Variation 1] The conductive module 2 of this modification is obtained by removing the bus bar side conductive member 40 from the conductive module 1 of the above-described embodiment and replacing the bus bar 10 with a bus bar 110 described below (FIGS. 6 and 7). Therefore, in this modification, the same components and parts as those in the conductive module 1 of the embodiment are denoted by the same reference numerals as in the embodiment, and their description will be omitted. Furthermore, the electrical connection component 30 of this modification may be a chip component 30A or a circuit component 30B, as in the embodiment. Here, the electrical connection component 30 configured as a chip component 30A is shown.

[0035] In the conductive module 2 of this modified example, a first electrical connection portion 110a is provided on the bus bar 110, and this first electrical connection portion 110a is physically and electrically connected to a first electrode of the electrical connection component 30 by soldering (FIGS. 6 and 7). The bus bar 110 of this modified example is formed in a rectangular flat plate shape like the bus bar 10 of the embodiment, but a notch is formed in part of the bus bar 110 to provide the first electrical connection portion 110a. The first electrical connection portion 110a shown here is formed as a piece that extends at a corner of the bus bar 110 in a direction perpendicular to the arrangement direction of the multiple battery cells BC.

[0036] The first electrical connection portion 110a of the bus bar 110 and the second electrical connection portion 20a of the wiring terminal 20B are disposed opposite each other with a gap therebetween. The electrical connection component 30 is installed straddling the first electrical connection portion 110a and the second electrical connection portion 20a. Here, the second electrical connection portion 20a of the wiring terminal 20B is disposed with a gap from the first electrical connection portion 110a of the bus bar 110 in a direction perpendicular to the arrangement direction of the multiple battery cells BC. Here, the electrical connection component 30 straddles the first electrical connection portion 110a and the second electrical connection portion 20a above the gap. In the electrical connection component 30, a first electrode is soldered to the first electrical connection portion 110a, and a second electrode is soldered to the second electrical connection portion 20a.

[0037] Like the conductive module 1 of the embodiment, this conductive module 2 includes an insulating member 150 that surrounds the electrical connection parts 30, the first electrical connection parts 110a, and the second electrical connection parts 20a to maintain their connected state (FIG. 6). This insulating member 150 is similar to the insulating member 50 of the embodiment. However, the insulating member 150 of this modification is designed to match the shapes and arrangement of the electrical connection parts 30, the first electrical connection parts 110a, and the second electrical connection parts 20a that it contains.

[0038] Like the first electrical connection portion 10a of the embodiment, the first electrical connection portion 110a has a locked portion 111 that is in close contact with the insulating member 150 inside and is locked to the insulating member 150 in the opposing arrangement direction to the second electrical connection portion 20a (FIGS. 6 and 7). The locked portion 111 is a circular through hole similar to the locked portion 42 of the embodiment, and a part of the insulating member 150 is filled into this through hole.

[0039] The engaging portions 111, 24 shown here are arranged in the opposing arrangement direction of the first electrical connection portion 110a and the second electrical connection portion 20a, with the electrical connection part 30 placed between them, just like the conductive module 1 of the embodiment.

[0040] The conductive module 2 of this modified example is obtained by replacing the bus bar 10 in the conductive module 1 of the embodiment with a bus bar 110, and giving the bus bar 110 the function of the bus bar side conductive member 40. Therefore, the conductive module 2 of this modified example can achieve the same effects as the conductive module 1 of the embodiment. The conductive module 2 of this modified example corresponds to the conductive module 1 of the embodiment from which the bus bar side conductive member 40 has been removed, and can be made smaller in size and at a lower cost than the conductive module 1 of the embodiment.

[0041] [Variation 2] The conductive module 3 of this modification is obtained by replacing the first electrical connection portion 10a and the second electrical connection portion 20a in the conductive module 1 of the above-described embodiment with the first electrical connection portion 210a and the second electrical connection portion 220a described below, or by replacing the first electrical connection portion 110a and the second electrical connection portion 20a in the conductive module 2 of the above-described modification 1 with the first electrical connection portion 210a and the second electrical connection portion 220a described below (FIGS. 8 and 9). Furthermore, the electrical connection component 30 of this modification may be a chip component 30A or a circuit component 30B, as in the embodiment and modification 1.

[0042] Here, an example is shown in which the wiring component 20 in the conductive module 1 of the embodiment is replaced with the wiring component 220 described below, and the bus bar side conductive member 40 is replaced with the bus bar side conductive member 240 described below (FIGS. 8 and 9). Here, an electrical connection component 30 configured as a chip component 30A is shown.

[0043] The wiring component 220 of this modification is obtained by replacing the wiring terminal 20B in the wiring component 20 of the embodiment with a wiring terminal 220B (FIGS. 8 and 9). Like the wiring terminal 20B of the embodiment, the wiring terminal 220B of this modification is formed as a terminal fitting extending in one direction, with one longitudinal end thereof serving as a second electrical connection portion 220a and the other longitudinal end thereof serving as an electric wire connection portion 223. One longitudinal end of the wiring terminal 220B is formed in a rectangular flat plate shape, and the second electrode of the electrical connection component 30 is physically and electrically connected to the second electric connection portion 220a at the one end by soldering. The electric wire connection portion 223 shown here is formed as a crimp terminal portion that is crimped to the exposed core portion 21a.

[0044] Like the busbar side conductive member 40 of the embodiment, the busbar side conductive member 240 of this modified example is formed as a rectangular, flat terminal fitting extending in one direction, with one longitudinal end serving as a first electrical connection portion 210a and the other longitudinal end serving as a busbar connection portion 241 that physically and electrically connects to the busbar 10 (FIGS. 8 and 9). A first electrode of the electrical connection part 30 is physically and electrically connected to the first electrical connection portion 210a by soldering. The busbar side conductive member 240 has the first electrical connection portion 210a protruding from the busbar 10 in a direction perpendicular to the arrangement direction of the plurality of battery cells BC, and the busbar connection portion 241 is physically and electrically connected to the busbar 10 by welding or the like.

[0045] In this modification, the first electrical connection portion 210a on the busbar 10 and the second electrical connection portion 220a of the wiring terminal 220B are also disposed opposite each other with a gap in a direction perpendicular to the arrangement direction of the multiple battery cells BC. Also in this modification, the electrical connection part 30 is installed across the gap, spanning the first electrical connection portion 210a and the second electrical connection portion 220a. In the electrical connection part 30, a first electrode is soldered to the first electrical connection portion 210a, and a second electrode is soldered to the second electrical connection portion 220a.

[0046] Like the conductive module 1 of the embodiment, this conductive module 3 includes an insulating member 250 that surrounds the electrical connection parts 30, the first electrical connection parts 210a, and the second electrical connection parts 220a to maintain their connection (FIG. 8). This insulating member 250 is similar to the insulating member 50 of the embodiment. However, the insulating member 250 of this modification is designed to match the shapes and arrangement of the electrical connection parts 30, the first electrical connection parts 210a, and the second electrical connection parts 220a that it contains.

[0047] Like the first electrical connection portion 10a and the second electrical connection portion 20a of the embodiment, the first electrical connection portion 210a and the second electrical connection portion 220a of this modified example each have locked portions 242, 224 that are in close contact with the insulating member 250 internally and are locked to the insulating member 250 in the opposing arrangement direction (FIGS. 8 and 9). However, the locked portions 242, 224 of this modified example are notches provided in the first electrical connection portion 210a and the second electrical connection portion 220a, respectively. In the locked portions 242, 224, the notches are filled with a portion of the insulating member 250.

[0048] The locked portions 242 are provided on each side of the first electrical connection portion 210a that is positioned in a direction perpendicular to the direction in which the first electrical connection portion 210a and the second electrical connection portion 220a face each other. The locked portions 224 are provided on each side of the second electrical connection portion 220a that is positioned in a direction perpendicular to the direction in which the second electrical connection portion 220a and the first electrical connection portion 210a face each other. Here, one locked portion 242 and one locked portion 224 are provided on each side of the first electrical connection portion 210a and the second electrical connection portion 220a.

[0049] Here, the locked portions 242, 224 (notches) have notch bottoms 242a, 224a located in a direction intersecting the opposing arrangement direction of the first electrical connection portion 210a and the second electrical connection portion 220a, and a pair of side walls 242b, 224b facing each other in the opposing arrangement direction (FIG. 10). The notches shown here are formed in a rectangular shape, and the sides located in a direction perpendicular to the opposing arrangement direction are the notch bottoms 242a, 224a.

[0050] In this conductive module 3, a portion of the insulating member 250 is filled in a solidified state in each of the locked portions 242, 224, and the insulating member 250 in each of the locked portions 242, 224 can lock the respective locked portions 242, 224. Therefore, in this conductive module 3, when a load acts on the bus bar side conductive member 240 or the wiring terminal 220B, causing them to move toward or away from each other, the force is transmitted from the locked portions 242, 224 to the insulating member 250 therein, and this force is received by the insulating member 250 in the locked portions 242, 224, so that transmission of the force to the electrical connection part 30 can be suppressed compared to when the locked portions 242, 224 are not provided. Therefore, in the conductive module 3 of this modification, the load applied to the solder connection between the first electrode of the electrical connection component 30 and the first electrical connection portion 210a of the bus bar side conductive member 240 and the solder connection between the second electrode of the electrical connection component 30 and the second electrical connection portion 220a of the wiring terminal 220B can be kept low, thereby protecting each solder connection. Therefore, the conductive module 3 can maintain the electrical conductivity between the first electrode and the first electrical connection portion 210a and between the second electrode and the second electrical connection portion 220a.

[0051] [Variation 3] The conductive module 4 of this modification is obtained by replacing the first electrical connection portion 10a and the second electrical connection portion 20a in the conductive module 1 of the above-described embodiment with the first electrical connection portion 310a and the second electrical connection portion 320a described below, or by replacing the first electrical connection portion 110a and the second electrical connection portion 20a in the conductive module 2 of the above-described modification 1 with the first electrical connection portion 310a and the second electrical connection portion 320a described below (FIGS. 11 and 12). Furthermore, the electrical connection component 30 of this modification may be a chip component 30A or a circuit component 30B, as in the embodiment and modification 1.

[0052] Here, an example is shown in which the wiring component 20 in the conductive module 1 of the embodiment is replaced with the wiring component 320 described below, and the bus bar side conductive member 40 is replaced with the bus bar side conductive member 340 described below (FIGS. 11 and 12). Here, an electrical connection component 30 configured as a chip component 30A is shown.

[0053] The wiring component 320 of this modification is obtained by replacing the wiring terminal 20B in the wiring component 20 of the embodiment with a wiring terminal 320B (FIGS. 11 and 12). Like the wiring terminal 20B of the embodiment, the wiring terminal 320B of this modification is formed as a terminal fitting extending in one direction, with one longitudinal end thereof serving as a second electrical connection portion 320a and the other longitudinal end thereof serving as an electric wire connection portion 323. One longitudinal end of the wiring terminal 320B is formed in a rectangular flat plate shape, and the second electrode of the electrical connection component 30 is physically and electrically connected to the second electric connection portion 320a at the one end by soldering. The electric wire connection portion 323 shown here is formed as a crimp terminal portion that is crimped to the exposed core portion 21a.

[0054] Like the busbar side conductive member 40 of the embodiment, the busbar side conductive member 340 of this modified example is formed as a rectangular, flat terminal fitting extending in one direction, with one longitudinal end serving as a first electrical connection portion 310a and the other longitudinal end serving as a busbar connection portion 341 that physically and electrically connects to the busbar 10 ( FIGS. 11 and 12 ). A first electrode of the electrical connection part 30 is physically and electrically connected to the first electrical connection portion 310a by soldering. The busbar side conductive member 340 has the first electrical connection portion 310a protruding from the busbar 10 in a direction perpendicular to the arrangement direction of the plurality of battery cells BC, and the busbar connection portion 341 is physically and electrically connected to the busbar 10 by welding or the like.

[0055] In this modification, the first electrical connection portion 310a on the busbar 10 and the second electrical connection portion 320a of the wiring terminal 320B are also disposed opposite each other with a gap in a direction perpendicular to the arrangement direction of the multiple battery cells BC. Also in this modification, the electrical connection part 30 is installed across the gap, spanning the first electrical connection portion 310a and the second electrical connection portion 320a. In the electrical connection part 30, a first electrode is soldered to the first electrical connection portion 310a, and a second electrode is soldered to the second electrical connection portion 320a.

[0056] Like the conductive module 1 of the embodiment, this conductive module 4 includes an insulating member 350 that surrounds the electrical connection parts 30, the first electrical connection parts 310a, and the second electrical connection parts 320a to maintain their connection (FIG. 11). This insulating member 350 is similar to the insulating member 50 of the embodiment. However, the insulating member 350 of this modification is designed to match the shapes and arrangement of the electrical connection parts 30, the first electrical connection parts 310a, and the second electrical connection parts 320a that it contains.

[0057] Similar to the first electrical connection portion 10a and the second electrical connection portion 20a of the embodiment, the first electrical connection portion 310a and the second electrical connection portion 320a of this modified example each have a locked portion 342, 324 that is in close contact with the insulating member 350 and locked to the insulating member 350 in the opposing arrangement direction (FIGS. 11 and 12). However, the locked portion 342, 324 of this modified example is a standing wall provided on the first electrical connection portion 310a and the second electrical connection portion 320a, respectively. These standing walls are walls that rise from the first electrical connection portion 310a and the second electrical connection portion 320a in a direction perpendicular to the opposing arrangement direction of the first electrical connection portion 310a and the second electrical connection portion 320a. The periphery of the locked portion 342, 324 is surrounded by a portion of the insulating member 350.

[0058] The locked portion 342 is provided at the end of the first electrical connection portion 310a on the second electrical connection portion 320a side, and at a position that avoids the electrical connection part 30. The locked portion 342 shown here is a wall that stands up at that position in a direction perpendicular to the plane of the first electrical connection portion 310a. The locked portion 324 is provided at the end of the second electrical connection portion 320a on the first electrical connection portion 310a side, and at a position that avoids the electrical connection part 30. The locked portion 324 shown here is a wall that stands up at that position in a direction perpendicular to the plane of the second electrical connection portion 320a.

[0059] The locked portion 342 of the first electrical connection portion 310a and the locked portion 324 of the second electrical connection portion 320a may be arranged to face each other in the opposing arrangement direction of the first electrical connection portion 310a and the second electrical connection portion 320a, or may be arranged not to face each other in this opposing arrangement direction. Here, the latter arrangement is adopted.

[0060] In this conductive module 4, the periphery of each of the locked portions 342, 324 is surrounded by a part of the insulating member 350 in a solidified state, and each of the locked portions 342, 324 can be locked by the insulating member 350 surrounding each of the locked portions 342, 324. Therefore, in this conductive module 4, when a load acts on the bus bar side conductive member 340 or the wiring terminal 320B, causing them to move toward or away from each other, the force is transmitted from the locked portions 342, 324 to the surrounding insulating member 350, and this force is received by the insulating member 350 surrounding the locked portions 342, 324. Therefore, transmission of the force to the electrical connection part 30 can be suppressed compared to when the locked portions 342, 324 are not provided. Therefore, in the conductive module 4 of this modification, the load applied to the solder connection between the first electrode of the electrical connection component 30 and the first electrical connection portion 310a of the bus bar side conductive member 340 and the solder connection between the second electrode of the electrical connection component 30 and the second electrical connection portion 320a of the wiring terminal 320B can be kept low, thereby protecting each solder connection. Therefore, the conductive module 4 can maintain the electrical conductivity between the first electrode and the first electrical connection portion 310a and between the second electrode and the second electrical connection portion 320a. [Explanation of symbols]

[0061] 1,2,3,4 Conduction Module 10,110 Bus Bar 10a, 110a, 210a, 310a First electrical connection portion 20,220,320 Wiring parts 20a, 220a, 320a Second electrical connection portion 20B,220B,320B wiring terminal 24,224,324 Locked part 30 Electrical connection parts 30A chip parts 30B Circuit Components 40, 240, 340 Busbar side conductive material (conductive material) 42,242,342 Locked part 50,150,250,350 Insulating material 111 Locked part 224a,242a Notch bottom 224b,242b side wall BC battery cell BCb electrode terminal BM battery module

Claims

1. a bus bar that is physically and electrically connected to the electrode terminals of the battery cells that constitute the battery module; a wiring component including a wiring terminal and electrically connecting the bus bar to a battery monitoring unit that monitors the battery state of the battery cell; an electrical connection component having a first electrode soldered to a first electrical connection portion on the bus bar side and a second electrode soldered to a second electrical connection portion of the wiring terminal; an insulating member that contains the electrical connection component, the first electrical connection portion, and the second electrical connection portion; Equipped with the electrical connection component is a chip component including the first electrode and the second electrode, or a circuit component provided with a wiring pattern having the first electrode and the second electrode, and is installed across the first electrical connection portion and the second electrical connection portion that are arranged opposite to each other with a gap therebetween, the insulating member is a molded body that is insert-molded to include the electrical connection component, the first electrical connection portion, and the second electrical connection portion, or a hardened body that is obtained by hardening a potting liquid that includes the electrical connection component, the first electrical connection portion, and the second electrical connection portion, A conductive module characterized in that the first electrical connection portion and the second electrical connection portion are closely attached to the insulating member internally and each have an engaging portion that engages with the insulating member in the opposing arrangement direction.

2. The conductive module described in claim 1, characterized in that the engaging portion is a through hole provided in each of the first electrical connection portion and the second electrical connection portion, and a portion of the insulating material is filled in the through hole.

3. the engaging portions are notches provided in the first electrical connection portion and the second electrical connection portion, and the notches are filled with a part of the insulating member; The conductive module described in claim 1, characterized in that the notch has a notch bottom located in a direction perpendicular to the opposing arrangement direction of the first electrical connection portion and the second electrical connection portion, and a pair of side walls facing each other in the opposing arrangement direction.

4. the engaging portions are upright walls provided on the first electrical connection portion and the second electrical connection portion, and the upright walls are surrounded by a part of the insulating member; The conductive module described in claim 1, characterized in that the standing walls are walls that rise up from the first electrical connection portion and the second electrical connection portion in a direction perpendicular to the opposing arrangement direction of the first electrical connection portion and the second electrical connection portion.

5. The conductive module according to claim 1 , wherein the first electrical connection portion is provided on a conductive member that is physically and electrically connected to the bus bar or on the bus bar.

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