Electrical connection unit

Abstract

One embodiment provides an electrical connection unit that can reduce the number of parts. [Solution] An electrical connection unit according to one embodiment comprises an electronic component having a first terminal and a first cable member having a first mounting hole and fixed to the first terminal by a first fastening member inserted into the first mounting hole from a first direction, wherein the first cable member comprises at least one first corrugated sheet aligned with the first mounting hole, and at least one of the first corrugated sheets is displaced in the first direction across a direction intersecting the first direction.

Description

Technical Field

[0001] Embodiments of the present invention relate to an electrical connection unit.

Background Art

[0002] An electrical connection unit having an electronic component and a wiring material electrically connected to the electronic component is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in an electrical connection unit, it is expected to reduce the number of parts.

[0005] One embodiment provides an electrical connection unit capable of reducing the number of parts.

Means for Solving the Problems

[0006] An electrical connection unit according to one embodiment includes an electronic component having a first terminal, and a first wiring material having a first mounting hole and fixed to the first terminal by a first fastening member inserted into the first mounting hole from a first direction, wherein the first wiring material includes at least one first corrugated plate aligned with the first mounting hole, and the at least one first corrugated plate is a corrugated plate displaced in the first direction across a direction intersecting the first direction.

Effects of the Invention

[0007] According to one embodiment, the number of parts can be reduced.

Brief Description of the Drawings

[0008] [Figure 1] A cross-sectional view showing the electrical connection unit of the first embodiment. [Figure 2] A perspective view showing a part of the electrical connection unit of the first embodiment. [Figure 3] A perspective view showing a disassembled portion of the electrical connection unit of the first embodiment. [Figure 4] Figure 2 shows a cross-sectional view along line IV-IV. [Figure 5] A cross-sectional view showing a portion of an electrical connection unit of a modified example of the first embodiment, along a line similar to the IV-IV line in Figure 2. [Figure 6] A cross-sectional view showing a portion of an electrical connection unit of another modification of the first embodiment, similar to the IV-IV line in Figure 2. [Figure 7] A cross-sectional view showing a portion of an electrical connection unit of yet another modification of the first embodiment, similar to the IV-IV line in Figure 2. [Figure 8] A perspective view showing a part of the electrical connection unit of the second embodiment. [Figure 9] Figure 8 shows a cross-sectional view along line IV-IV. [Modes for carrying out the invention]

[0009] The embodiments will be described below with reference to the drawings. In the following description, components having the same or similar functions will be denoted by the same reference numerals. Duplication of these components may be omitted. The components described below do not limit the scope of the embodiments.

[0010] In this disclosure, terms are defined as follows: “Connection” may include electrical connections, not just mechanical ones. That is, “Connection” may include cases where two elements to be connected are directly connected, not just cases where two elements to be connected are connected with another element in between. “Facing” or “overlapping” means that the virtual projections of two objects overlap when viewed from a particular direction. That is, “Facing” or “overlapping” may include cases where two objects face each other with another member or gap between them, not just cases where two objects face each other. “Parallel,” “orthogonal,” or “same” may include cases where they are “approximately parallel,” “approximately orthogonal,” or “approximately the same,” respectively.

[0011] In this disclosure, the +X direction, -X direction, +Y direction, -Y direction, +Z direction, and -Z direction are defined as follows: The +X direction is, for example, the direction from the electronic component 10 (described later) toward the first connection portion 31 of the busbar 30 (see Figure 1). The -X direction is the direction opposite to the +X direction. Hereinafter, when the +X direction and the -X direction are not distinguished, they will simply be referred to as the "X direction". The +Y direction and the -Y direction are directions that intersect (for example, are orthogonal to) the X direction. The Y direction is, for example, the direction in which the first terminal 13A and the second terminal 13B of the electronic component 10 (described later) are aligned (see Figure 3). The +Y direction is, for example, the direction from the first terminal 13A toward the second terminal 13B of the electronic component 10 (described later). The -Y direction is the direction opposite to the +Y direction. Hereinafter, when the +Y direction and the -Y direction are not distinguished, they will simply be referred to as the "Y direction". The +Z and -Z directions intersect (for example, are perpendicular to) the X and Y directions. The +Z direction is the direction from the first wall 5a to the second wall 5b of the housing 5 (see Figure 1). The -Z direction is the opposite direction to the +Z direction. Hereafter, when the +Z and -Z directions are not distinguished, they will simply be referred to as the "Z direction". The "X direction" is an example of the first direction. The "Y direction" is an example of the second direction. The "Z direction" is an example of the third direction.

[0012] Hereinafter, when the X direction and the Y direction are not distinguished, it may be referred to as the "horizontal direction". Hereinafter, the Z direction may be referred to as the "vertical direction". Also hereinafter, the +Z direction side may be referred to as "up" and the -Z direction side may be referred to as "down". However, these expressions are for convenience of explanation and do not limit the gravitational direction (installation posture of the electrical connection unit 1).

[0013] (A. First Embodiment) <A1. Configuration of Electrical Connection Unit> FIG. 1 is a cross-sectional view showing the electrical connection unit 1 of the first embodiment. The electrical connection unit 1 is an in-vehicle device mounted on a vehicle such as an EV (Electric Vehicle), HEV (Hybrid Electric Vehicle), or PHEV (Plug-in Hybrid Electric Vehicle). The electrical connection unit 1 may be referred to as, for example, an "electrical connection box" or a "junction box". However, the electrical connection unit 1 is not limited to a box-shaped device. The electrical connection unit 1 has, for example, a housing 5 and a main body unit MU.

[0014] The housing 5 is a member that forms the outer shell of the electrical connection unit 1. The housing 5 is made of, for example, a synthetic resin and has insulation properties. The housing 5 houses the main body unit MU. The housing 5 includes a first wall portion 5a (first portion) that covers at least a part of the main body unit MU from the -Z direction side and a second wall portion 5b (second portion) that covers at least a part of the main body unit MU from the +Z direction side. Note that the housing 5 may be omitted.

[0015] Further, instead of the box-shaped housing 5, the electrical connection unit 1 may have an insulating base member 6 that includes a first wall portion 5a and is open on the +Z direction side. The first wall portion 5a of the base member 6 may be a wall portion along the horizontal direction, or may be a structure in which a plurality of ribs standing in the vertical direction are combined. Further, instead of the box-shaped housing 5, the electrical connection unit 1 may have an insulating base member 7 that includes a second wall portion 5b and is open on the -Z direction side. The second wall portion 5b of the base member 7 may be a wall portion along the horizontal direction, or may be a structure in which a plurality of ribs standing in the vertical direction are combined. In the following description, "housing 5" may be read as "base member 6" or "base member 7". Each of the housing 5, the base member 6, and the base member 7 is an example of a "support body" that supports an electronic component 10 or a bus bar 30 described later.

[0016] Further, instead of the box-shaped housing 5, the electrical connection unit 1 may have an insulating base member 6 that includes a first wall portion 5a and is open on the +Z direction side, or an insulating base member 7 that includes a second wall portion 5b and is open on the -Z direction side. The first wall portion 5a of the base member 6 may be a wall portion along the horizontal direction, or may be a structure in which a plurality of ribs standing in the vertical direction are combined. The second wall portion 5b of the base member 7 may be a wall portion along the horizontal direction, or may be a structure in which a plurality of ribs standing in the vertical direction are combined. In the following description, "housing 5" may be read as "base member 6" or "base member 7". Each of the housing 5, the base member 6, and the base member 7 is an example of a "support body" that supports an electronic component 10 or a bus bar 30 described later.

[0017] The main body portion MU is a portion that performs the main functions of the electrical connection unit 1 (for example, switching the electrical connection state or overcurrent protection). The main body portion MU may be referred to as a "circuit configuration body". The main body portion MU includes, for example, one or more electronic components 10 and a plurality of bus bars 30 (see FIG. 2).

[0018] <A2. Electronic Component> First, the electronic component 10 will be described. The electronic component 10 is an electronic component mounted according to the functions required for the main body unit MU. The electronic component 10 is, for example, a connector, a fuse, a relay (e.g., a mechanical relay or a semiconductor relay), a capacitor, a branching component, various sensors (e.g., a current sensor or a voltage sensor), an electronic control unit, or an electronic component unit formed by unitizing two or more of these. However, the type of the electronic component 10 is not limited to the above examples. The electronic component 10 is, for example, a heat-generating component that generates heat when energized.

[0019] FIG. 2 is a perspective view showing a part of the electrical connection unit 1. FIG. 3 is a perspective view showing a part of the electrical connection unit 1 disassembled. The electronic component 10 has, for example, a case 11, a component main body portion 12, a plurality of terminals 13, and a plurality of mounting portions 14 (only one is shown in FIGS. 2 and 3).

[0020] The case 11 is an outer member that forms most of the outer shape of the electronic component 10. The case 11 is made of, for example, synthetic resin and has insulating properties. The case 11 houses the component main body portion 12. Note that the case 11 and the component main body portion 12 may be integrally formed.

[0021] In the present embodiment, the case 11 has an insulating rib 11a that protrudes in the horizontal direction (e.g., the +X direction) and extends in the Z direction. The insulating rib 11a is, for example, plate-shaped along the X direction and the Z direction. The insulating rib 11a extends, for example, over the entire length of the case 11 in the Z direction. The insulating rib 11a is disposed between a plurality of terminals 13 (terminals 13A and 13B described later) when viewed from the X direction. The insulating rib 11a electrically insulates between the terminal 13A and the terminal 13B. Also in the present embodiment, the insulating rib 11a is disposed between a first bus bar 30A and a second bus bar 30B described later. The insulating rib 11a electrically insulates, for example, between the first bus bar 30A and the second bus bar 30B.

[0022] The main body of the component 12 is the part that performs the main function of the electronic component 10. For example, if the electronic component 10 is a relay, the main body of the component 12 includes a switching part (e.g., a contact part) that switches between a conductive state and a non-conductive state. For example, if the electronic component 10 is a fuse, the main body of the component 12 includes a fuse that melts when an overcurrent flows. For example, if the electronic component 10 is a capacitor, the main body of the component 12 includes a part that stores electric charge.

[0023] Terminal 13 is an electrical connection part exposed to the outside of the case 11. Terminal 13 is electrically connected to the component body 12 inside the case 11. In this embodiment, the electronic component 10 includes terminals 13A and terminal 13B as a plurality of terminals 13. One of terminals 13A and terminal 13B is the positive terminal. The other of terminals 13A and terminal 13B is the negative terminal. One of terminals 13A and terminal 13B is an example of a "first terminal". The other of terminals 13A and terminal 13B is an example of a "second terminal".

[0024] In this embodiment, terminals 13A and 13B are provided at one end of the electronic component 10 in the horizontal direction (e.g., the X direction). Terminals 13A and 13B are arranged side by side in the horizontal direction (e.g., the Y direction). Each of terminals 13A and 13B faces the horizontal direction (e.g., the X direction).

[0025] Each terminal 13 has a mounting hole 13h into which a fastening member 41 (e.g., a screw or bolt), described later, is inserted. The mounting hole 13h opens horizontally (e.g., in the +X direction). In this embodiment, the fastening member 41 is inserted into the mounting hole 13h from the X direction (e.g., from the +X direction side). The inner circumferential surface of the mounting hole 13h of the electronic component 10 has a screw groove. The mounting hole 13h is a bottomed hole provided in the electronic component 10.

[0026] (Mounting part) The attachment portion 14 is a portion for fixing the electronic component 10. The attachment portion 14 is, for example, stacked in the Z direction on a fixing portion 5f (such as a boss, see FIG. 2) provided on the first wall portion 5a or the second wall portion 5b of the housing 5. The attachment portion 14 has an attachment hole 14h into which a fastening member 19 (such as a screw or a bolt) is inserted (see FIG. 3). The attachment hole 14h opens in the Z direction. The attachment hole 14h is an insertion hole through which the fastening member 19 passes. The attachment portion 14 is fixed to the fixing portion 5f of the housing 5 by the fastening member 19. With this configuration, the electronic component 10 is fixed to the housing 5. Instead of the above example, the electronic component 10 may be fixed to the base member 6 or the base member 7 described above.

[0027] <A3. Wiring material> Next, returning to FIG. 1, the bus bar 30 will be described. The bus bar 30 is a wiring material for electrically connecting a plurality of connection targets. The bus bar 30 is made of metal (for example, made of copper, copper alloy, aluminum, or aluminum alloy) and has conductivity. The bus bar 30 electrically connects the first connection target (first component) and the second connection target (second component). For example, the bus bar 30 electrically connects the electronic component 10 and another bus bar 9 in the electrical connection unit 1. The electronic component 10 is an example of the "first connection target" or the "first component". The bus bar 9 is an example of the "second connection target" or the "second component". The bus bar 30 is an example of the "wiring material". In the present disclosure, the "wiring material" is not limited to the bus bar 30. In the present disclosure, the "connection component" means a component that is disposed between a wiring material (such as a bus bar) and a connection target (such as an electronic component or another bus bar) and connects the wiring material (such as a bus bar) and the connection target.

[0028] Furthermore, the first and second connection targets are not limited to the examples above. The connection target can be any one of the following: an electronic component, a connection component, another busbar in the electrical connection unit 1, or a busbar for external connection. For example, busbar 30 may electrically connect electronic component 10 (first connection target) to another electronic component 10 (second connection target). Below, as an example of busbar 30, a busbar 30 that electrically connects electronic component 10 (first connection target) to another busbar 9 (second connection target) in the electrical connection unit 1 will be described. However, in the following description, the terms "electronic component 10" and "busbar 9" may be appropriately replaced with other components based on the above-mentioned intent.

[0029] As shown in Figure 1, the busbar 30 has, for example, a first connecting portion 31, a second connecting portion 32, and an extension portion 33. In this embodiment, the entire busbar 30, including the first connecting portion 31, the second connecting portion 32, and the extension portion 33, is formed from a single sheet of material (for example, formed by bending a single sheet of material).

[0030] As shown in Figure 3, the electrical connection unit 1 has multiple busbars 30, including a first busbar 30A and a second busbar 30B. In the following, when the first busbar 30A and the second busbar 30B are not distinguished, they will simply be referred to as "busbar 30".

[0031] (First connection section) The first connection portion 31 is the portion that connects to the first connection target (e.g., the electronic component 10). The first connection portion 31 is located in the middle of the bus bar 30 or at the first end of the bus bar 30. In this embodiment, the first connection portion 31 is positioned upright in the Z direction. The first connection portion 31 may be, for example, a plate portion along the Y and Z directions. The first connection portion 31 is adjacent to the electronic component 10 in the X direction. When viewed from the X direction, the first connection portion 31 includes a portion that overlaps with the terminal 13 of the electronic component 10. In another view, when viewed from the X direction, the first connection portion 31 includes a portion that overlaps with the fastening member 41 inserted into the terminal 13 or the washer 42 through which the fastening member 41 passes.

[0032] The first connecting portion 31 has a mounting hole 31h into which a fastening member 41 is inserted from the X direction (for example, from the +X direction). The mounting hole 31h does not have, for example, a screw thread. The mounting hole 31h is, for example, a through hole that penetrates the first connecting portion 31 in the X direction. The mounting hole 31h of the first connecting portion 31 faces the mounting hole 13h of the electronic component 10 in the X direction. The fastening member 41 is inserted into the mounting hole 31h of the first connecting portion 31 along the X direction. The fastening member 41 passed through the mounting hole 31h of the first connecting portion 31 engages with the mounting hole 13h of the electronic component 10. This configuration physically and electrically connects the first connecting portion 31 of the busbar 30 to the terminal 13 of the electronic component 10.

[0033] The first connection section 31 includes a heat storage section 80. The heat storage section 80 is a structure for improving the thermal properties (e.g., heat storage and / or heat dissipation) of the electrical connection unit 1. The heat storage section 80 is a part that stores (absorbs) at least a portion of the heat emitted by the first connection target (electronic component 10) or the second connection target, and / or at least a portion of the heat emitted by the wiring material (e.g., bus bar 30) itself. In addition to the above example, the heat storage section 80 may also be a part that reduces thermal interference to the electronic component 10 from external equipment (external connection bus bar).

[0034] (Heat storage section of the first cable member) The heat storage section 80 of the first busbar 30A has a pair of first corrugated sheets 80A. The pair of first corrugated sheets 80A sandwich the mounting hole 31h of the first busbar 30A. Of the pair of first corrugated sheets 80A, one first corrugated sheet 80A is located on one side in the Y direction of the mounting hole 31h of the first busbar 30A. Of the pair of first corrugated sheets 80A, the other first corrugated sheet 80A is located on the other side in the Y direction of the mounting hole 31h of the first busbar 30A. The first busbar 30A may be, for example, an integrally molded product including the pair of first corrugated sheets 80A.

[0035] As shown in Figures 3 and 4, each first corrugated sheet 80A is a corrugated sheet that is displaced in the X direction (wavy in the X direction) across the Y direction. Each first corrugated sheet 80A may, for example, have a constant thickness and a shape that is curved along a plane wave with an equiphase plane being the ZX plane. Each first corrugated sheet 80A may be a corrugated sheet that is displaced in the X direction such that, for example, its maximum width in the X direction is twice or more than its thickness.

[0036] Each first corrugated sheet 80A may have a constant thickness and a shape that follows, for example, a sine wave in its cross-section along the XY plane. Each first corrugated sheet 80A may have a shape that follows, for example, one period of a sine wave in its cross-section along the XY plane, or it may have a shape that follows, for example, several periods of a sine wave.

[0037] Each front and back surface of each first corrugated sheet 80A may have, for example, a shape in which peaks extending in the Z direction and troughs extending in the Z direction are aligned in the Y direction. Each front and back surface of each first corrugated sheet 80A may have, for example, a plane wave shape with the equiphase plane being the ZX plane. Each front and back surface of each first corrugated sheet 80A may have, for example, peaks extending in the Z direction and troughs extending in the Z direction. Each front and back surface of the first corrugated sheet 80A may have, for example, one pair of peaks extending in the Z direction and troughs extending in the Z direction, or multiple pairs.

[0038] (Heat storage section of the second cable member) The heat storage section 80 of the second busbar 30B has a pair of second corrugated sheets 80B. The pair of second corrugated sheets 80B sandwich the mounting hole 31h of the second busbar 30B. Of the pair of second corrugated sheets 80B, one second corrugated sheet 80B is located on one side in the Y direction of the mounting hole 31h of the second busbar 30B. Of the pair of second corrugated sheets 80B, the other second corrugated sheet 80B is located on the other side in the Y direction of the mounting hole 31h of the second busbar 30B. The second busbar 30B may be, for example, an integrally molded product including the pair of second corrugated sheets 80B.

[0039] Each second corrugated sheet 80B is a corrugated sheet that is displaced in the X direction (wavy in the X direction) across the Y direction. Each second corrugated sheet 80B may, for example, have a constant thickness and have a shape that is curved along a plane wave with an equiphase plane being the ZX plane. Each second corrugated sheet 80B may be a corrugated sheet that is displaced in the X direction such that, for example, its maximum width in the X direction is twice or more than its thickness.

[0040] Each second corrugated sheet 80B may have a constant thickness in a cross-section along the XY plane and, for example, a shape that follows a sine wave. Each second corrugated sheet 80B may have a shape that follows, for example, one period of a sine wave in a cross-section along the XY plane, or it may have a shape that follows, for example, several periods of a sine wave.

[0041] Each front and back surface of each second corrugated sheet 80B may have, for example, a shape in which peaks extending in the Z direction and troughs extending in the Z direction are aligned in the Y direction. Each front and back surface of each second corrugated sheet 80B may have, for example, a plane wave shape with the equiphase plane being the ZX plane. Each front and back surface of each second corrugated sheet 80B may have, for example, peaks extending in the Z direction and troughs extending in the Z direction. Each front and back surface of the second corrugated sheet 80B may have, for example, one pair or multiple pairs of peaks and troughs extending in the Z direction.

[0042] (Second connection point) The second connecting portion 32 is the portion that connects to a second connection target (for example, another busbar 9). The second connecting portion 32 is located in the middle of the busbar 30 or at the second end of the busbar 30. In this embodiment, the second connecting portion 32 is parallel to the first wall portion 5a of the housing 5. The second connecting portion 32 is a plate portion that is aligned with the X and Y directions. The second connecting portion 32 may, for example, have a flat plate shape aligned with the X and Y directions. The second connecting portion 32 overlaps with the end of the busbar 9 in the Z direction. When viewed from the Z direction, the second connecting portion 32 includes a portion that overlaps with the fastening member 45 or the washer 46 through which the fastening member 45 passes, as described later. In this embodiment, the busbar 9 has a mounting hole 9h through which the fastening member 45 is inserted. The mounting hole 9h does not have, for example, a screw thread.

[0043] The second connecting portion 32 has a mounting hole 32h into which a fastening member 45 (e.g., a screw or bolt) is inserted. The mounting hole 32h does not have, for example, a screw thread. The mounting hole 32h is, for example, a through hole that penetrates the second connecting portion 32 in the Z direction. The mounting hole 32h of the second connecting portion 32 faces the mounting hole 9h of the busbar 9 in the Z direction. The fastening member 45 is inserted along the Z direction into the mounting hole 32h of the second connecting portion 32 and the mounting hole 9h of the busbar 9. An engaging member 47 (e.g., a nut) is engaged with the tip of the fastening member 45 that has passed through the mounting hole 32h of the second connecting portion 32 and the mounting hole 9h of the busbar 9. This configuration physically and electrically connects the second connecting portion 32 of the busbar 30 to another busbar 9.

[0044] Alternatively, instead of the above example, either the mounting hole 32h of the second connecting portion 32 or the mounting hole 9h of the busbar 9 may have a screw groove so that the fastening member 45 can engage with it. In this case, the engaging member 47 may be omitted.

[0045] (extension part) The extension portion 33 is provided between the first connecting portion 31 and the second connecting portion 32. The extension portion 33 extends from the first connecting portion 31 toward the second connecting portion 32. The extension portion 33 extends across the first connecting portion 31 and the second connecting portion 32. The extension portion 33 connects the first connecting portion 31 and the second connecting portion 32.

[0046] In this embodiment, the extended portion 33 bends in the -X direction from the -Z direction end of the first connecting portion 31 and extends along the X direction. The extended portion 33 may, for example, have a flat plate shape along the X and Y directions in the portion that extends along the X direction.

[0047] Next, we will describe the arrangement of the multiple busbars 30. The first connection portion 31 of the first bus bar 30A is adjacent to the first terminal 13A of the electronic component 10 in the X direction. The first connection portion 31 of the first bus bar 30A is fixed to the first terminal 13A of the electronic component 10 by a fastening member 41 (fastening member 41A) inserted into the mounting hole 31h of the first connection portion 31 of the first bus bar 30A from the X direction. The first bus bar 30A is an example of a "first wiring material". The mounting hole 31h of the first connection portion 31 of the first bus bar 30A is an example of a "first mounting hole". The fastening member 41A is an example of a "first fastening member".

[0048] The second bus bar 30B is adjacent to the first bus bar 30A in the Y direction. The first connection portion 31 of the second bus bar 30B is adjacent to the second terminal 13B of the electronic component 10 in the X direction. The first connection portion 31 of the second bus bar 30B is fixed to the second terminal 13B of the electronic component 10 by a fastening member 41 (fastening member 41B) inserted into the mounting hole 31h of the first connection portion 31 of the second bus bar 30B from the X direction. The second bus bar 30B is an example of a "second wiring material". The mounting hole 31h of the first connection portion 31 of the second bus bar 30B is an example of a "second mounting hole". The fastening member 41B is an example of a "second fastening member".

[0049] <A4. Advantages> According to the electrical connection unit 1 of the present embodiment, the first bus bar 30A includes a first corrugated plate 80A aligned with the mounting hole 31h. With this configuration, the heat capacity around the mounting hole 31h of the first bus bar 30A can be increased. Due to this effect, the first corrugated plate 80A can be provided with a heat storage function. Therefore, the number of components can be reduced. If the number of components can be reduced, for example, cost reduction can be achieved.

[0050] As a comparative example, when the first connection portion of the first bus bar is a flat plate having the first mounting hole as a whole, it is necessary to separately attach a component having a heat storage function to the first bus bar. Therefore, in the configuration of such a comparative example, the number of components increases.

[0051] According to the electrical connection unit 1 of the present embodiment, in contrast to such a comparative example, the first corrugated plate 80A can be provided with a heat storage function. Therefore, the number of components can be reduced.

[0052] According to the electrical connection unit 1 of the present embodiment, the first bus bar 30A includes a pair of first corrugated plates 80A sandwiching the mounting hole 31h. With this configuration, a heat storage function can be provided on both sides of the mounting hole 31h of the first bus bar 30A. Therefore, the heat capacity can be increased in a balanced manner.

[0053] According to the electrical connection unit 1 of the present embodiment, the second bus bar 30B includes a second corrugated plate 80B aligned with the mounting hole 31h. With this configuration, the heat capacity around the mounting hole 31h of the second bus bar 30B can be increased. By this action, the first corrugated plate 80A can be provided with a heat storage function. Therefore, the number of components can be reduced. If the number of components can be reduced, for example, cost reduction can be achieved.

[0054] According to the electrical connection unit 1 of the present embodiment, the first corrugated plate 80A is a corrugated plate displaced in the X direction across the Y direction intersecting the X direction. Also, according to the electrical connection unit 1 of the present embodiment, the second corrugated plate 80B is a corrugated plate displaced in the X direction across the Y direction intersecting the X direction. With this configuration, a heat storage function can be provided in the space extending in the Y direction in the first connection portion 31. Therefore, the space extending in the Y direction in the first connection portion 31 can be effectively utilized.

[0055] <A5. Modified Example> Next, a modified example of the first embodiment will be described.

[0056] (Modified Example 1) The first bus bar 30A of the present embodiment has a pair of first corrugated plates 80A. However, if the first bus bar 30A includes a heat storage portion 80, it may be configured in any manner. As a modified example, the first bus bar 30A may include only one of the pair of first corrugated plates 80A.

[0057] (Modification 2) The second busbar 30B in this embodiment has a pair of second corrugated sheets 80B. However, the second busbar 30B may be configured in any way as long as it includes a heat storage section 80. As a modification, the second busbar 30B may include only one of the pair of second corrugated sheets 80B.

[0058] (Variation 3) Each first corrugated sheet 80A in this embodiment has a constant thickness and a sinusoidal shape in a cross-section along the XY plane. However, each first corrugated sheet 80A may be configured in any way that increases the heat capacity compared to a flat sheet.

[0059] As a modified example, as shown in Figure 5, each first corrugated sheet 80A may have a constant thickness and a shape that follows a triangular wave in a cross-section along the XY plane. In this case, each first corrugated sheet 80A may have a shape that follows, for example, one period of the triangular wave in a cross-section along the XY plane, or it may have a shape that follows, for example, several periods of the triangular wave.

[0060] As another modification, as shown in Figure 6, each first corrugated sheet 80A may have a shape that follows a trapezoidal wave with a constant thickness in a cross-section along the XY plane. In this case, each first corrugated sheet 80A may have a shape that follows, for example, one period of the trapezoidal wave in a cross-section along the XY plane, or it may have a shape that follows, for example, several periods of the trapezoidal wave.

[0061] As another variation, as shown in Figure 7, each first corrugated sheet 80A may have a shape that follows a rectangular wave with a constant thickness in a cross-section along the XY plane. In this case, each first corrugated sheet 80A may have a shape that follows, for example, one period of the rectangular wave in a cross-section along the XY plane, or it may have a shape that follows, for example, several periods of the rectangular wave.

[0062] (Modification 4) Each second corrugated sheet 80B in this embodiment has a constant thickness and a sinusoidal shape in a cross-section along the XY plane. However, each second corrugated sheet 80B may be configured in any way that increases the heat capacity compared to a flat sheet.

[0063] As a modified example, as shown in Figure 5, each second corrugated sheet 80B may have a constant thickness and a shape that follows the triangular wave in a cross-section along the XY plane. In this case, each second corrugated sheet 80B may have a shape that follows, for example, one period of the triangular wave in a cross-section along the XY plane, or it may have a shape that follows, for example, several periods of the triangular wave.

[0064] As another modification, as shown in Figure 6, each second corrugated sheet 80B may have a constant thickness and a shape that follows a trapezoidal wave in a cross-section along the XY plane. In this case, each second corrugated sheet 80B may have a shape that follows, for example, one period of the trapezoidal wave in a cross-section along the XY plane, or it may have a shape that follows, for example, several periods of the trapezoidal wave.

[0065] As another variation, as shown in Figure 7, each second corrugated sheet 80B may have a shape that follows a rectangular wave with a constant thickness in a cross-section along the XY plane. In this case, each second corrugated sheet 80B may have a shape that follows, for example, one period of the rectangular wave in a cross-section along the XY plane, or it may have a shape that follows, for example, several periods of the rectangular wave.

[0066] (Variation 5) In this embodiment, each of the pair of first corrugated sheets 80A is a corrugated sheet that is displaced in the X direction across the Y direction intersecting the X direction. However, if the first connection part 31 can be provided with a heat storage function, each of the pair of first corrugated sheets 80A may be a corrugated sheet that is displaced in any direction, not limited to the Y direction. As a modification, at least one of the pair of first corrugated sheets 80A may be a corrugated sheet that is displaced in the X direction across a direction inclined with respect to the Y direction. In this case, the direction inclined with respect to the Y direction may be a direction within the YZ plane or a direction inclined with respect to the YZ plane.

[0067] Similarly, if the first connection portion 31 can be provided with a heat storage function, each of the pair of second corrugated sheets 80B may be a corrugated sheet that is displaced in any direction, not just the Y direction. As a modification, at least one of the pair of second corrugated sheets 80B may be a corrugated sheet that is displaced in the X direction in a direction inclined with respect to the Y direction. In this case, the direction inclined with respect to the Y direction may be a direction within the YZ plane or a direction inclined with respect to the YZ plane.

[0068] (B. Second Embodiment) The second embodiment differs from the first embodiment in that the first connection section 31 includes a heat storage section 180 instead of a heat storage section 80. Other than the configuration described below, the configuration is the same as that of the first embodiment.

[0069] <B1.バスバー> (First connection section) As shown in Figure 8, the first connection section 31 includes a heat storage section 180. The heat storage section 180 is a structure for improving the thermal properties (e.g., heat storage and / or heat dissipation) of the electrical connection unit 1. The heat storage section 180 is a part that stores (absorbs) at least a portion of the heat emitted by the first connection target (electronic component 10) or the second connection target, and / or at least a portion of the heat emitted by the wiring material (e.g., bus bar 30) itself. In addition to the above example, the heat storage section 180 may also be a part that reduces thermal interference to the electronic component 10 from external equipment (external connection bus bar).

[0070] (Heat storage section of the first cable member) The heat storage section 180 of the first busbar 30A has a pair of first corrugated sheets 180A. The pair of first corrugated sheets 180A sandwich the mounting hole 31h of the first busbar 30A. Of the pair of first corrugated sheets 180A, one first corrugated sheet 180A is located on one side in the Z direction of the mounting hole 31h of the first busbar 30A. Of the pair of first corrugated sheets 180A, the other first corrugated sheet 180A is located on the other side in the Z direction of the mounting hole 31h of the first busbar 30A. The first busbar 30A may be, for example, an integrally molded product including the pair of first corrugated sheets 180A.

[0071] Each first corrugated sheet 180A is a corrugated sheet that is displaced in the X direction (wavy in the X direction) across the Z direction. Each first corrugated sheet 180A may be a corrugated sheet that is displaced in the X direction such that, for example, the maximum width in the X direction is twice or more than the thickness of the sheet. For example, each of the front and back surfaces of each first corrugated sheet 180A may have a shape in which peaks extending in the Y direction and troughs extending in the Y direction are aligned in the Z direction.

[0072] Each front and back surface of each first corrugated sheet 180A may have a plane wave shape with the equiphase plane being the XY plane. Each front and back surface of each first corrugated sheet 180A may have, for example, a crest extending in the Y direction and a trough extending in the Y direction. Each front and back surface of the first corrugated sheet 180A may have, for example, one pair of crests extending in the Y direction and troughs extending in the Y direction, or multiple pairs.

[0073] As shown in Figure 9, each first corrugated sheet 180A may have a constant thickness and a shape that follows, for example, a sine wave in a cross-section along the ZX plane. Each first corrugated sheet 180A may have a shape that follows, for example, one period of a sine wave in a cross-section along the ZX plane, or it may have a shape that follows, for example, several periods of a sine wave.

[0074] (Heat storage section of the second cable member) The heat storage section 180 of the second busbar 30B has a pair of second corrugated sheets 180B. The pair of second corrugated sheets 180B sandwich the mounting hole 31h of the second busbar 30B. Of the pair of second corrugated sheets 180B, one second corrugated sheet 180B is located on one side in the Z direction of the mounting hole 31h of the second busbar 30B. Of the pair of second corrugated sheets 180B, the other second corrugated sheet 180B is located on the other side in the Z direction of the mounting hole 31h of the second busbar 30B. The second busbar 30B may be, for example, an integrally molded product including the pair of second corrugated sheets 180B.

[0075] Each second corrugated plate 180B is a corrugated plate that is displaced in the X direction across the Z direction (undulating in the X direction). Each second corrugated plate 180B may be, for example, a corrugated plate that is displaced in the X direction such that the maximum width in the X direction is at least twice the plate thickness. For example, each of the front and back surfaces of each second corrugated plate 180B may have a shape in which ridges extending in the Y direction and valleys extending in the Y direction are arranged in the Z direction.

[0076] Each of the front and back surfaces of each second corrugated plate 180B may have the shape of a plane wave with an equiphase surface as the XY plane. Each of the front and back surfaces of each second corrugated plate 180B may have, for example, ridges extending in the Y direction and valleys extending in the Y direction. Each of the front and back surfaces of the second corrugated plate 180B may have, for example, one pair or a plurality of pairs of ridges extending in the Z direction and valleys extending in the Z direction.

[0077] Each second corrugated plate 180B may have a constant plate thickness and, for example, a shape along a sine wave in a cross section along the ZX plane. Each second corrugated plate 180B may have, for example, a shape along one period of a sine wave or, for example, a shape along several periods of a sine wave in a cross section along the ZX plane.

[0078] <B2. Advantages> According to the electrical connection unit 1 of the present embodiment, the first bus bar 30A includes the first corrugated plate 180A aligned with the mounting hole 31h. With this configuration, the heat capacity around the mounting hole 31h of the first bus bar 30A can be increased. By this action, the first corrugated plate 180A can be given a heat storage function. Therefore, the number of parts can be reduced. If the number of parts can be reduced, for example, cost reduction can be achieved.

[0079] According to the electrical connection unit 1 of the present embodiment, the first bus bar 30A includes a pair of first corrugated plates 180A sandwiching the mounting hole 31h. With this configuration, heat storage functions can be provided on both sides of the mounting hole 31h of the first bus bar 30A. Therefore, the heat capacity can be increased in a balanced manner.

[0080] According to the electrical connection unit 1 of the present embodiment, the second bus bar 30B includes a second corrugated plate 180B aligned with the mounting hole 31h. With this configuration, it is possible to increase the heat capacity around the mounting hole 31h of the second bus bar 30B. In addition, by this action, the first corrugated plate 180A can be provided with a heat storage function. Therefore, the number of components can be reduced. If the number of components can be reduced, for example, cost reduction can be achieved.

[0081] According to the electrical connection unit 1 of the present embodiment, the first corrugated plate 180A is a corrugated plate displaced in the X direction across the Z direction intersecting the X direction. Also, according to the electrical connection unit 1 of the present embodiment, the second corrugated plate 180B is a corrugated plate displaced in the X direction across the Z direction intersecting the X direction. With this configuration, a heat storage function can be provided in the space extending in the Z direction among the first connection portions 31. Therefore, the space extending in the Z direction among the first connection portions 31 can be effectively utilized.

[0082] <B3. Modified Example> In the present embodiment, each of the pair of first corrugated plates 180A is a corrugated plate displaced in the X direction across the Z direction intersecting the X direction. However, as long as the first connection portion 31 can be provided with a heat storage function, each of the pair of first corrugated plates 180A may be a corrugated plate displaced in any direction across, not limited to the Z direction. As a modified example, at least one of the pair of first corrugated plates 180A may be a corrugated plate displaced in the X direction across a direction inclined with respect to the Y direction. At that time, the direction inclined with respect to the Y direction may be a direction within the YZ plane or a direction inclined with respect to the YZ plane.

[0083] Similarly, as long as the first connection portion 31 can be provided with a heat storage function, each of the pair of second corrugated plates 180B may be a corrugated plate displaced in any direction across, not limited to the Z direction. As a modified example, at least one of the pair of second corrugated plates 180B may be a corrugated plate displaced in the X direction across a direction inclined with respect to the Z direction. At that time, the direction inclined with respect to the Y direction may be a direction within the YZ plane or a direction inclined with respect to the YZ plane.

[0084] Several embodiments and modifications have been described above. However, the embodiments and modifications are not limited to the examples described above. For example, the above-described embodiments or modifications may be implemented in combination with each other. For example, a modification of the first embodiment may be implemented in combination with the second embodiment. Also, the second embodiment may be implemented in combination with the first embodiment. The first connection part 31 may include, for example, a heat storage part 80 in addition to the heat storage part 180. [Explanation of symbols]

[0085] 1. Electrical connection unit 5 cabinets 5a 1st wall 5b 2nd wall part 5f Fixed part 6 Base member 7 Base member 9 Bus bar 9h mounting holes 10 Electronic Components 11 cases 11a Insulating rib 12. Main body of the component 13 terminals 13A 1st terminal 13A terminal 13B 2nd terminal 13B terminal 13h mounting holes 14 Mounting part 14h mounting holes 19 Fastening members 30 Bus Bar 30A First busbar (first cable member) 30B Second bus bar (second cable member) 31. First connection section 31h Mounting holes (1st mounting hole, 2nd mounting hole) 32 Second connection section 32h mounting holes 33 Stretching section 41 Fastening members 41A Fastening member (first fastening member) 41B Fastening member (second fastening member) 42 washers 45 Fastening members 46 Washers 47 Engaging member 80 Heat storage section 80A First Corrugated Sheet 80B Second Corrugated Sheet 180 Heat storage section 180A First Corrugated Sheet 180B Second Corrugated Sheet MU Main Unit

Claims

1. An electronic component having a first terminal, A first cable member having a first mounting hole and fixed to the first terminal by a first fastening member inserted into the first mounting hole from a first direction, Equipped with, The first cable member comprises at least one first corrugated sheet adjacent to the first mounting hole, The at least one first corrugated sheet is a corrugated sheet that is displaced in the first direction across a direction intersecting the first direction. Electrical connection unit.

2. The at least one first corrugated sheet includes a pair of first corrugated sheets that sandwich the first mounting hole. The electrical connection unit according to claim 1.

3. The electronic component further has a second terminal aligned in the second direction with respect to the first terminal, The device further comprises a second cable member having a second mounting hole, which is fixed to the second terminal by a second fastening member inserted into the second mounting hole from the first direction, The second cable member comprises at least one second corrugated sheet adjacent to the second mounting hole, The at least one second corrugated sheet is a corrugated sheet that is displaced in the first direction across a direction intersecting the first direction. The electrical connection unit according to claim 1 or 2.

4. The direction intersecting the first direction is the second direction. The electrical connection unit according to claim 3.

5. The direction intersecting the first direction is the third direction intersecting the second direction. The electrical connection unit according to claim 3.

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