Electrical connection unit

Abstract

The electrical connection unit includes electronic components, wiring components, a first metal plate, and a second metal plate. The electronic components have terminals. The first metal plate includes a first portion and a second portion. The first portion is fixed to the terminals by a first fastening component. The second portion is bent from the first portion and fixed to the wiring components by a second fastening component. The second metal plate includes a third portion and a fourth portion. The third portion is configured to overlap the first portion and is fastened to the terminals by the first fastening component. The fourth portion is bent from the third portion, overlaps the second portion, and is fastened to the wiring components by the second fastening component.

Description

Technical Field

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

[0002] An electrical connection unit is known, which includes electronic components and wiring components electrically connected to the electronic components.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Unexamined Patent Application, First Publication No. 2024-037492 Summary of the Invention

[0006] The goal is to improve the thermal characteristics of the electrical connection unit and reduce its cost.

[0007] The embodiment provides an electrical connection unit that can improve thermal characteristics and reduce costs.

[0008] The electrical connection unit according to an embodiment includes an electronic component, a wiring component, a first metal plate, and a second metal plate. The electronic component has terminals. The first metal plate includes a first portion and a second portion. The first portion is fixed to the terminals by a first fastening component. The second portion is bent from the first portion and fixed to the wiring component by a second fastening component. The second metal plate includes a third portion and a fourth portion. The third portion is configured to overlap the first portion and is fastened to the terminals by the first fastening component. The fourth portion is bent from the third portion, overlaps the second portion, and is fastened to the wiring component by the second fastening component.

[0009] According to the embodiments, it is possible to improve the thermal characteristics of the electrical connection unit and reduce its cost. Attached Figure Description

[0010] Figure 1 This is a partially exploded perspective view of the electrical connection unit according to an embodiment.

[0011] Figure 2 This is a perspective view illustrating the electronic components and connecting elements according to this embodiment.

[0012] Figure 3 This is a perspective view illustrating the busbar according to an embodiment.

[0013] Figure 4 This is a perspective view illustrating the connecting elements according to the first aspect of the embodiment.

[0014] Figure 5 This is a cross-sectional view showing a portion of the electrical connection unit according to the first aspect of the embodiment.

[0015] Figure 6 This is a plan view showing a portion of the electrical connection unit according to the first aspect of the embodiment.

[0016] Figure 7 This is a cross-sectional view used to illustrate a modified example of the electrical connection unit according to the first aspect of the embodiment.

[0017] Figure 8 This is a perspective view illustrating Example 1 of the connecting elements according to the second aspect of the embodiment.

[0018] Figure 9 This is a perspective view illustrating Example 2 of the connecting element according to the second aspect of the embodiment.

[0019] Figure 10 This is a perspective view illustrating Example 3 of the connecting element according to the second aspect of the embodiment.

[0020] Figure 11 This is a perspective view of Example 4, which illustrates the connecting element according to the second aspect of the embodiment.

[0021] Figure 12 This is a perspective view of Example 5, which illustrates the connecting element according to the second aspect of the embodiment.

[0022] Figure 13 This is a perspective view of Example 6, which illustrates the connecting element according to the second aspect of the embodiment.

[0023] Figure 14 This is a perspective view of Example 7, which illustrates the connecting element according to the second aspect of the embodiment.

[0024] Figure 15 This is a perspective view of Example 8, which illustrates the connecting element according to the second aspect of the embodiment.

[0025] Figure 16 This is a perspective view illustrating Example 1 of the connecting element according to the third aspect of the embodiment.

[0026] Figure 17 This is a partially exploded perspective view of the electrical connection unit according to the third aspect of the embodiment.

[0027] Figure 18 This is a plan view illustrating Example 1 of the connecting elements according to the third aspect of the embodiment.

[0028] Figure 19 This is a cross-sectional view illustrating Example 1 of the connecting element according to the third aspect of the embodiment.

[0029] Figure 20This is a perspective view illustrating Example 2 of the connecting element according to the third aspect of the embodiment.

[0030] Figure 21 This is a cross-sectional view illustrating Example 2 of the connecting element according to the third aspect of the embodiment.

[0031] Figure 22 This is a perspective view illustrating Example 3 of the connecting element according to the third aspect of the embodiment.

[0032] Figure 23 This is a cross-sectional view of Example 3, which illustrates the connecting element according to the third aspect of the embodiment.

[0033] Figure 24 This is a perspective view of Example 4, which illustrates the connecting element according to the third aspect of the embodiment.

[0034] Figure 25 This is a cross-sectional view of Example 4, which illustrates the connecting element according to the third aspect of the embodiment.

[0035] Reference tag list

[0036] 1 Electrical connection unit

[0037] 20, 20X, 20A, 20B Electronic Components

[0038] 31 Fastening component (first fastening component)

[0039] 40 Busbar (wiring component)

[0040] 43 Fastening component (second fastening component)

[0041] 44 Connecting components

[0042] 50, 50X, 50Y, 50Z connecting elements

[0043] 60 First metal plate (first metal component)

[0044] 61 Part One

[0045] 61h mounting hole

[0046] 62 Part Two

[0047] 62h mounting hole

[0048] 70 Second metal plate

[0049] 71 Part Three

[0050] 71h mounting hole

[0051] 72 Part Four

[0052] 72h mounting hole

[0053] 80 Second metal plate (second metal component)

[0054] 80g concave part

[0055] 81 Base

[0056] 81h Opening (Insertion Section)

[0057] 82 First Bend

[0058] 83 Second bend

[0059] S1 gap Detailed Implementation

[0060] The embodiments will now be described with reference to the accompanying drawings. In the following description, constructions having the same or similar functions are identified by the same reference numerals. Redundant descriptions of these constructions may be omitted. The constructions described below do not limit the scope of the embodiments.

[0061] In this disclosure, the terms are defined as follows: The term "connection" is not limited to mechanical connection, but may also include electrical connection. That is, the term "connection" is not limited to the case where two components are directly connected, but may include the case where two components are connected by another component between them. The terms "facing," "overlapping," or "adjacent" refer to the overlap of virtual projected images of two objects when viewed from a particular direction. That is, the terms "facing" or "overlapping" are not limited to the case where two objects directly face each other, but may include the case where two objects face each other with another component or gap between them. Furthermore, the terms "facing" or "overlapping" are not limited to the case of complete overlap when viewed from a particular direction, but may also include the case of at least partial overlap. The term "adjacent" is not limited to the case where two objects are adjacent to each other, but may include the case where two objects are arranged with another component or gap between them. The terms "parallel," "orthogonal," or "identical" may respectively include "generally parallel," "generally orthogonal," or "generally identical."

[0062] 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 the direction from the first end 11e1 of the lower wall 11 of the housing 10, which will be described later, to the second end 11e2 (see...). Figure 1The -X direction is the direction opposite to the +X direction. Hereinafter, without distinguishing between the +X and -X directions, these directions will be simply referred to as the "X direction". The +Y and -Y directions are directions that intersect (e.g., are orthogonal) the X direction. The +Y direction is the direction from the third end 11e3 of the lower wall 11 of the housing 10, which will be described later, to the fourth end 11e4 (see...). Figure 1 The -Y direction is the direction opposite to the +Y direction. Hereinafter, without distinguishing between the +Y and -Y directions, these directions will be simply referred to as the "Y direction". The +Z and -Z directions are directions that intersect (e.g., are orthogonal) the X and Y directions. The +Z direction is the direction from the lower wall 11 of the housing 10, which will be described later, toward the main body MU (see...). Figure 1 The -Z direction is the opposite of the +Z direction. In the following text, without distinguishing between the +Z and -Z directions, these directions will be simply referred to as the "Z direction".

[0063] In the following text, without distinguishing between the X and Y directions, these directions may be referred to as "horizontal directions". In the following text, the Z direction may be referred to as "vertical directions". In the following text, 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 ease of description and do not restrict the direction of gravity of the electrical connection unit 1 (the installation posture of the electrical connection unit 1).

[0064] (Example)

[0065] <1. Construction of Electrical Connection Unit>

[0066] Figure 1 This is a partially exploded perspective view of an electrical connection unit 1 according to an embodiment. The electrical connection unit 1 is, for example, an on-board device installed in a vehicle such as an electric vehicle (EV), a hybrid electric vehicle (HEV), or a plug-in hybrid electric vehicle (PHEV). The electrical connection unit 1 may be referred to, for example, as an "electrical connection box" or "junction box." However, the electrical connection unit 1 is not limited to a box-shaped device. The electrical connection unit 1 includes, for example, a housing 10 and a body MU.

[0067] (case)

[0068] The housing 10 is a component forming the outer shell of the electrical connection unit 1. The housing 10 has, for example, a flat, box-like shape. The housing 10 is made of, for example, synthetic resin and has insulating properties. The housing 10 houses the main body MU. The housing 10 has, for example, a lower wall 11 (first wall portion), an upper wall 12 (second wall portion), and a peripheral wall 13 (third wall portion). The lower wall 11 covers at least a portion of the main body MU from below (-Z direction side). The upper wall 12 covers at least a portion of the main body MU from above (+Z direction side). The peripheral wall 13 surrounds the periphery of the main body MU.

[0069] The housing 10 includes, for example, a first component 10MA including a lower wall 11; and a second component 10MB including an upper wall 12 and a peripheral wall 13. In this embodiment, the housing 10 is formed by combining the first component 10MA and the second component 10MB. Note that the lower wall 11 may be formed by an insulating sheet or the like instead of a rigid wall. Part or all of the housing 10 may be omitted.

[0070] (main body)

[0071] The main body MU is the part that performs the main functions of the electrical connection unit 1 (e.g., switching of electrical connection states or overload current protection). The main body MU can be referred to as a "circuit configuration". The main body MU includes, for example, a base component 15, multiple electronic components 20, multiple busbars 40, and multiple connecting elements 50.

[0072] <2. Base Components>

[0073] First, the base component 15 will be described. The base component 15 is a component that supports one or more electronic components 20 and / or one or more busbars 40 inside the housing 10. The base component 15 is made of, for example, synthetic resin and has insulating properties. The base component 15 is disposed in the Z direction between the electronic components 20 and busbars 40 and the lower wall 11 of the housing 10. The base component 15 is, for example, fixed to the lower wall 11 of the housing 10. The base component 15 supports one or more electronic components 20 and / or one or more busbars 40 from below. The base component 15 can be a wall portion along the horizontal direction, a structure composed of multiple ribs erected in the vertical direction, etc. The base component 15 can be formed as a part of the housing 10.

[0074] <3. Electronic Components>

[0075] Next, electronic component 20 will be described. Electronic component 20 is an electronic component installed according to the functions required by the main body MU. Electronic component 20 is, for example, a connector, fuse, relay (e.g., mechanical relay or semiconductor relay), capacitor, branch element, any type of sensor (e.g., current sensor or voltage sensor), electronic control unit, or an electronic component unit in which two or more of the above components are integrated. However, the type of electronic component 20 is not limited to the examples above. Electronic component 20 is, for example, a heat-generating element that generates heat when energized.

[0076] Figure 2 This is a perspective view used to illustrate electronic component 20 and connecting component 50. Figure 2 An electronic component 20X is shown as an example of an electronic component 20. The electronic component 20X includes, for example, a housing 21, a component body 22, a plurality of terminals 23, and a plurality of mounting portions 24. Figure 2 Only one is shown in the image.

[0077] (shell)

[0078] The housing 21 is the outer part that forms most of the shape of the electronic component 20. The housing 21 is made of, for example, synthetic resin and has insulating properties. The housing 21 houses the component body 22. Note that the housing 21 and the component body 22 can be formed integrally.

[0079] (Component body)

[0080] The main body 22 is the part that performs the main functions of the electronic component 20. For example, if the electronic component 20 is a relay, the main body 22 includes a switch (e.g., a contact) that switches between an on and off state. For example, if the electronic component 20 is a fuse, the main body 22 includes a fusible portion that melts when an overload current flows. For example, if the electronic component 20 is a capacitor, the main body 22 includes a portion that accumulates charge.

[0081] (terminal)

[0082] Each terminal 23 is an electrical connection portion exposed outside the housing 21. The terminal 23 is electrically connected to the component body 22 inside the housing 21. In this embodiment, the electronic component 20 includes terminals 23A and 23B, which are a plurality of terminals 23. One of terminals 23A and 23B is a positive terminal. The other of terminals 23A and 23B is a negative terminal. One of terminals 23A and 23B is an example of a "first terminal." The other of terminals 23A and 23B is an example of a "second terminal."

[0083] exist Figure 2 In the example shown, terminals 23A and 23B are located at one end of the electronic component 20 in the horizontal direction (e.g., the X direction). Terminals 23A and 23B are arranged side by side in the horizontal direction (e.g., the Y direction). Terminals 23A and 23B are oriented in the horizontal direction (e.g., the X direction).

[0084] Each terminal 23 has a mounting hole 23h into which a fastening member 31 (e.g., a screw or bolt, described later) is inserted. The mounting hole 23h opens in a horizontal direction (e.g., the -X direction). In this embodiment, the fastening member 31 is inserted into the mounting hole 23h from the X direction (e.g., from the -X direction side). The inner peripheral surface of the mounting hole 23h of the electronic component 20 has a threaded groove. The mounting hole 23h is a bottomed engagement hole provided in the electronic component 20.

[0085] (Assembly section)

[0086] The mounting portion 24 is used to fix the electronic component 20. For example, the mounting portion 24 connects with the fixing portion 16 (e.g., a boss; see [reference]) provided on the base member 15 in the Z direction. Figure 5 The mounting portion 24 has a mounting hole 24h into which a fastening member 29 (e.g., a screw or bolt) is inserted. The mounting hole 24h is open in the Z direction. The mounting portion 24 is mounted to the base component 15 by securing the fastening member 29, which passes through the mounting hole 24h, to the fixing portion 16 of the base component 15. When the mounting portion 24 is mounted to the base component 15, the electronic component 20 is fixed to the base component 15.

[0087] <4. Convergence Bar>

[0088] Next, bus bar 40 will be described.

[0089] Figure 3 This is a perspective view illustrating busbar 40. Busbar 40 is a component used to form a conductive path in electrical connection unit 1. Each of the plurality of busbars 40 extends between and electrically connects the plurality of electronic components 20. Furthermore, each of the other plurality of busbars 40 extends between an electronic component 20 and another connection object element (e.g., busbar 49 for external connection), electrically connecting the electronic component 20 to the connection object element. Busbar 40 is an example of a "wiring component." Busbar 40 may be referred to as a "wiring section." The plurality of busbars 40 includes, for example, a first busbar 40A and a second busbar 40B.

[0090] In this embodiment, the busbar 40 is formed as a plate extending in a horizontal direction. The busbar 40 extends in the X or Y direction. The busbar 40 is disposed away from the terminal 23 of the electronic component 20 in the Z direction.

[0091] In this embodiment, the busbar 40 is formed by arranging multiple (e.g., two) metal plates 41 in an overlapping manner in the Z direction. The metal plates 41 have a plate shape extending in the horizontal direction. The thickness T3 of each metal plate 41 (thickness in the Z direction, see...) Figure 5 The thickness is, for example, 3 mm. The metal plate 41 is made of, for example, copper, copper alloy, aluminum, or aluminum alloy. Note that each busbar 40 can be formed by a single metal plate instead of multiple metal plates 41 formed in an overlapping manner.

[0092] <5. Connecting Elements>

[0093] Next, the connecting element 50 will be described. The connecting element 50 is a component for connecting the electronic component 20X to the busbar 40, respectively. Each connecting element 50 is disposed between the electronic component 20X and the busbar 40, and electrically connects the electronic component 20X and the busbar 40. Note that in this disclosure, "disposed between the electronic component and the busbar" is not limited to the case where it is located between the electronic component and the busbar when viewed from the X or Y direction, but may include the case where it is located between the electronic component and the busbar when viewed from a direction inclined relative to the horizontal direction.

[0094] In this embodiment, the electrical connection unit 1 includes one or more of a first-aspect connection element 50X, a second-aspect connection element 50Y, and a third-aspect connection element 50Z as connection elements 50. These connection elements 50X, 50Y, and 50Z will be described in sequence below.

[0095] <6. Connecting elements in the first aspect>

[0096] <6.1 Overall Construction of the Connecting Elements in the First Aspect>

[0097] First, the connecting element 50X of the first aspect will be described.

[0098] Figure 4 This is a perspective view illustrating the connecting element 50X of the first aspect. The connecting element 50X of the first aspect includes a first metal plate 60 and a second metal plate 70. The connecting element 50X is formed by arranging the first metal plate 60 and the second metal plate 70 in an overlapping manner. The first metal plate 60 is formed, for example, by bending a metal plate into an L-shape through a plastic forming process such as stamping. Similarly, the second metal plate 70 is formed, for example, by bending a metal plate into an L-shape through a plastic forming process such as stamping.

[0099] Each of the first metal plate 60 and the second metal plate 70 is made of, for example, copper, a copper alloy, aluminum, or an aluminum alloy. The first metal plate 60 and the second metal plate 70 are components made of, for example, the same material. When the first metal plate 60 and the second metal plate 70 have the same thickness and material, they can be manufactured using a common material. In this case, it is easy to reduce the manufacturing cost (e.g., material procurement cost) of the electrical connection unit 1.

[0100] Alternatively, the first metal plate 60 and the second metal plate 70 can be made of different materials. For example, one of the first metal plate 60 and the second metal plate 70 can be formed of copper or a copper alloy, while the other of the first metal plate 60 and the second metal plate 70 can be formed of aluminum or an aluminum alloy. In this case, thermal conductivity and weight reduction can be easily achieved.

[0101] In this embodiment, the thickness T1 of the first metal plate 60 and the thickness T2 of the second metal plate 70 are equal (see...). Figure 5 The thickness T1 of the first metal plate 60 and the thickness T2 of the second metal plate 70 are both, for example, 3 mm. For example, when the thickness and material of the first metal plate 60 and the second metal plate 70 are the same as the thickness and material of the metal plate 41 of the busbar 40, the metal plate 41, the first metal plate 60, and the second metal plate 70 can be manufactured from the same material. In this case, it is easy to further reduce the manufacturing cost (e.g., material procurement cost) of the electrical connection unit 1.

[0102] <6.2 First Metal Plate>

[0103] Next, refer to Figure 2 Details of the first metal plate 60 are described below. The first metal plate 60 includes a first portion 61 and a second portion 62.

[0104] (Part 1)

[0105] The first portion 61 extends in the Z direction along the end of the electronic component 20X in the X direction. The first portion 61 has a plate-like shape extending in both the Y and Z directions. When viewed from the X direction, the first portion 61 at least partially overlaps with the electronic component 20. For example, when viewed from the X direction, the first portion 61 overlaps with the terminal 23 of the electronic component 20X.

[0106] The first part 61 has a mounting hole 61h. The mounting hole 61h is a through hole extending through the first part 61 in the X direction. The mounting hole 61h faces the terminal 23 of the electronic component 20X in the X direction. The mounting hole 61h, for example, does not have a threaded groove. The mounting hole 61h receives the insertion of a fastening member 31. By engaging the fastening member 31, which passes through the mounting hole 61h, with the mounting hole 23h of the terminal 23 of the electronic component 20X, the first part 61 is secured to the terminal 23 of the electronic component 20X. In other words, the first part 61 is secured to the terminal 23 of the electronic component 20X by the fastening member 31. The fastening member 31 is an example of a "first fastening member".

[0107] (Part Two)

[0108] The second part 62 bends from the end of the first part 61 in the -Z direction towards the -X direction and extends in the X direction. The second part 62 has a plate-like shape extending in both the X and Y directions. The second part 62 extends along the busbar 40 (see...). Figure 4 When viewed from the Z direction, the second part 62 at least partially overlaps with the busbar 40 (see...). Figure 4 ).

[0109] In this embodiment, the fastening member 43 is attached to the busbar 40. The fastening member 43 is, for example, a riveting bolt that secures the busbar 40 to the busbar 40. In this embodiment, the busbar 40 has a through hole 40h (see...). Figure 5 The through hole 40h extends through the busbar 40 in the Z direction. The fastening member 43 passes through the through hole 40h of the busbar 40 and protrudes from the busbar 40 in the +Z direction.

[0110] The second portion 62 of the first metal plate 60 has a mounting hole 62h. The mounting hole 62h is a through hole extending through the second portion 62 in the Z direction. The mounting hole 62h, for example, does not have a threaded groove. The mounting hole 62h receives the insertion of the fastening member 43 (see...). Figure 5 The second part 62 is secured to the busbar 40 (see figure 40) by engaging the engaging part 44 (e.g., a nut) with the end of the fastening part 43 that passes through the mounting hole 62h. Figure 5 In other words, the second part 62 is secured to the busbar 40 by fastening member 43. Fastening member 43 is an example of a "second fastening member".

[0111] (Arc-shaped part)

[0112] At the boundary between the first portion 61 and the second portion 62, an arc-shaped portion 63 is formed by bending the second portion 61 relative to the first portion 61. The arc-shaped portion 63 is formed as an arc with a first radius of curvature.

[0113] <6.3 Second Metal Plate>

[0114] Next, refer to Figure 2 Details of the second metal plate 70 are described. The second metal plate 70 includes a third part 71 and a fourth part 72.

[0115] (Part Three)

[0116] The third portion 71 extends along the first portion 61 of the first metal plate 60 in the Z direction. The third portion 71 has a plate-like shape extending in both the Y and Z directions. When viewed from the X direction, the third portion 71 at least partially overlaps with the electronic component 20. For example, when viewed from the X direction, the third portion 71 overlaps with the terminal 23 of the electronic component 20X. The third portion 71 is configured to overlap with the first portion 61 of the first metal plate 60 from the side opposite to the electronic component 20X.

[0117] The third part 71 has a mounting hole 71h. The mounting hole 71h is a through hole penetrating the third part 71 in the X direction. The mounting hole 71h communicates with the mounting hole 61h of the first metal plate 60 in the X direction and faces the terminal 23 of the electronic component 20X in the X direction. The mounting hole 71h, for example, does not have a threaded groove. The mounting hole 71h receives the insertion of the fastening member 31. By engaging the fastening member 31, which passes through the mounting holes 71h of the second metal plate 70 and the mounting holes 61h of the first metal plate 60, with the terminal 23 of the electronic component 20X, the third part 71 is secured to the terminal 23 of the electronic component 20X. In other words, the third part 71 of the second metal plate 70 is fastened together with the first part 61 of the first metal plate 60 and the terminal 23 of the electronic component 20X by means of the fastening member 31.

[0118] (Part Four)

[0119] The fourth part 72 bends in the -X direction from the end of the third part 71 on the -Z direction side and extends in the X direction. The fourth part 72 has a plate-like shape extending in both the X and Y directions. The fourth part 72 extends along the second part 62 of the first metal plate 60 (see...). Figure 4 When viewed from the Z direction, the fourth section 72 at least partially overlaps with the busbar 40 (see...). Figure 4 The fourth part 72 is configured to overlap with the second part 62 of the first metal plate 60 from the side opposite to the busbar 40.

[0120] Part 72 has a mounting hole 72h. The mounting hole 72h is a through hole extending through part 72 in the Z direction. The mounting hole 72h, for example, does not have a threaded groove. The mounting hole 72h receives the insertion of the fastening component 43 (see...). Figure 5 The fourth portion 72 is secured to the busbar 40 by engaging the engagement member 44 (e.g., a nut) with the end of the fastening member 43 passing through the mounting holes 62h of the first metal plate 60 and the second metal plate 70. In other words, the fourth portion 72 of the second metal plate 70 is fastened together with the second portion 62 of the first metal plate 60 and the busbar 40 by the fastening member 43.

[0121] (Arc-shaped part)

[0122] At the boundary between the third portion 71 and the fourth portion 72, an arc-shaped portion 73 is formed by bending the fourth portion 72 relative to the third portion 71. The arc-shaped portion 73 is formed as an arc with a second radius of curvature. The second radius of curvature is, for example, smaller than the first radius of curvature of the arc-shaped portion 63 of the first metal plate 60. The arc-shaped portion 73 of the second metal plate 70 is configured to overlap with the arc-shaped portion 63 of the first metal plate 60.

[0123] <6.4 Shapes of the First and Second Metal Plates>

[0124] Figure 5 This is a cross-sectional view showing a portion of the electrical connection unit 1. A first portion 61 of the first metal plate 60 has a first end E1 located on the side opposite to the busbar 40. Similarly, a third portion 71 of the second metal plate 70 has a second end E2 located on the side opposite to the busbar 40. Furthermore, in this embodiment, the first end E1 and the second end E2 are positioned identically in the Z-direction.

[0125] Furthermore, the second portion 62 of the first metal plate 60 has a third end E3 located on the side opposite to the electronic component 20X. Similarly, the fourth portion 72 of the second metal plate 70 has a fourth end E4 located on the side opposite to the electronic component 20X. In addition, in this embodiment, the third end E3 and the fourth end E4 are positioned in the same direction in the X direction.

[0126] Figure 6 This is a plan view showing a portion of the electrical connection unit 1. In this embodiment, the length L21 of the first metal plate 60 in the X direction and the length L22 of the second metal plate 70 in the X direction are equal. Furthermore, the lengths L21 and L22 of the first metal plate 60 in the X direction and the second metal plate 70 in the X direction are both less than the length L11 of the electronic component 20X in the X direction.

[0127] In this embodiment, the length (width) W21 of the first metal plate 60 in the Y direction is equal to the length (width) W22 of the second metal plate 70 in the Y direction. Furthermore, the length (width) W21 of the first metal plate 60 in the Y direction and the length (width) W22 of the second metal plate 70 in the Y direction are each greater than half the width W11 of the electronic component 20X in the Y direction.

[0128] In this embodiment, each of the first metal plate 60 and the second metal plate 70 extends beyond the side surface 21s of the electronic component 20X in the Y direction. For example, the first portion 61 and the second portion 62 of the first metal plate 60 included in the first connecting element 50A, as well as the third portion 71 and the fourth portion 72 of the second metal plate 70 included in the first connecting element 50A, extend beyond the side surface 21s of the electronic component 20X in the +Y direction direction in the +Y direction direction. That is, the first portion 61 and the second portion 62 of the first metal plate 60 included in the first connecting element 50A, and the third portion 71 and the fourth portion 72 of the second metal plate 70 included in the first connecting element 50A, protrude from the side surface 21s of the electronic component 20X in the +Y direction direction towards the +Y direction direction side.

[0129] On the other hand, the first portion 61 and the second portion 62 of the first metal plate 60 included in the second connecting element 50B, as described below, and the third portion 71 and the fourth portion 72 of the second metal plate 70 included in the second connecting element 50B, extend beyond the side surface 21s of the electronic element 20X in the -Y direction direction. That is, the second portion 61 and the second portion 62 of the first metal plate 60 included in the second connecting element 50B, and the third portion 71 and the fourth portion 72 of the second metal plate 70 included in the second connecting element 50B, protrude from the side surface 21s of the electronic element 20X in the -Y direction direction direction toward the -Y direction side.

[0130] <6.5 Arrangement of Multiple Connecting Elements>

[0131] Next, refer to Figure 4 The arrangement of the multiple connecting elements 50 is described. In this embodiment, two connecting elements 50 (first connecting element 50A and second connecting element 50B) are provided for one electronic component 20X.

[0132] The first connecting element 50A is a connecting element corresponding to the terminal 23A of the electronic component 20X. The first metal plate 60 and the second metal plate 70 of the first connecting element 50A are fastened together with the terminal 23A of the electronic component 20X by a fastening member 31 (fastening member 31A). The first metal plate 60 and the second metal plate 70 of the first connecting element 50A are fastened together with the first busbar 40A by a fastening member 43 (fastening member 43A). With this configuration, the first connecting element 50A physically and electrically connects the terminal 23A of the electronic component 20X to the first busbar 40A.

[0133] The second connecting element 50B is arranged side-by-side with respect to the first connecting element 50A in the Y direction. For example, the second connecting element 50B is located on the -Y direction side relative to the first connecting element 50A. The second connecting element 50B is a connecting element corresponding to the terminal 23B of the electronic component 20X. The first metal plate 60 and the second metal plate 70 of the second connecting element 50B are fastened together with the terminal 23B of the electronic component 20X by a fastening member 31 (fastening member 31B). The first metal plate 60 and the second metal plate 70 of the second connecting element 50B are fastened together with the second busbar 40B by a fastening member 43 (fastening member 43B). With this configuration, the second connecting element 50B physically and electrically connects the terminal 23B of the electronic component 20X to the second busbar 40B.

[0134] <6.6 Variations of the First Aspect>

[0135] Next, a modified example of the connecting element 50X in the first aspect will be described.

[0136] Figure 7 This is a cross-sectional view showing a modified example of the electrical connection unit 1 of the first aspect. Here, depending on the material or thickness of the first metal plate 60 or the second metal plate 70, the radii of curvature of the arcuate portions 63 and 73 may be increased. Furthermore, to ensure a sufficient fastening force to secure the plurality of metal plates 60 and 70 to the electronic component 20X, the fastening member 31 may be enlarged. In any of these cases, the distance between the arcuate portion 73 of the second metal plate 70 and the fastening member 31 becomes shorter, and in some cases, the arcuate portion 73 of the second metal plate 70 and the fastening member 31 may interfere with each other.

[0137] Therefore, in this modified example, the lower surface BS2 of the connecting element 50X (the contact surface between the connecting element 50X and the busbar 40) is arranged below the lower surface BS1 of the electronic element 20X. With this configuration, the distance between the arcuate portion 73 of the second metal plate 70 and the fastening member 31 is increased, and interference between the arcuate portion 73 of the second metal plate 70 and the fastening member 31 can be suppressed even when the arcuate portion 73 is larger and / or the size of the fastening member 31 is increased.

[0138] <6.7 Advantages of the connecting elements in the first aspect>

[0139] As a comparative example, to improve the thermal characteristics (e.g., heat storage and / or heat dissipation) of electrical connection units, consider using an L-shaped metal block (heat storage block) as a connecting element for connecting electronic components and wiring components. Such metal blocks are typically forged and are generally expensive. Therefore, as a connecting element for connecting electronic components and wiring components, it is conceivable to use a metal sheet that is cheaper than forged products by bending. However, the thickness of the available metal sheet is limited, and it may be difficult to adequately ensure the heat capacity.

[0140] Therefore, in this embodiment, the connecting element (e.g., connecting element 50) includes a first metal plate (e.g., first metal plate 60) and a second metal plate (e.g., second metal plate 70). The first metal plate includes a first portion (e.g., first portion 61) and a second portion (e.g., second portion 62). The first portion is secured to a terminal of an electronic component (e.g., terminal 23A of electronic component 20X) by a first fastening member (e.g., fastening member 31). The second portion is bent from the first portion and secured to a wiring component (e.g., busbar 40) by a second fastening member (e.g., fastening member 43). The second metal plate includes a third portion (e.g., third portion 71) and a fourth portion (e.g., fourth portion 72). The third portion is configured to overlap with the first portion and is fastened to the terminal by the first fastening member. The fourth portion is bent from the third portion, arranged to overlap with the second portion, and fastened to the wiring component by the second fastening member.

[0141] This construction allows for the formation of a connection element that links electronic components to wiring components by stacking two metal plates. This construction facilitates the use of metal plates that are less expensive than forged metals while ensuring sufficient heat capacity. Consequently, the thermal characteristics of the electrical connection unit (e.g., heat storage and / or heat dissipation) are improved, and costs are reduced.

[0142] In this embodiment, the terminal is open in a first direction. The wiring component is located away from the terminal in a second direction intersecting the first direction. A first portion of the first metal plate and a third portion of the second metal plate at least partially overlap with the electronic component when viewed from the first direction and extend in the second direction. A second portion of the first metal plate and a fourth portion of the second metal plate at least partially overlap with the wiring component when viewed from the second direction and extend in the first direction. With this configuration, in a structure where the terminal of the electronic component and the wiring component are separated in a direction different from the opening direction of the terminal of the electronic component, a connecting element connecting the electronic component and the wiring component can be formed by stacking the two metal plates.

[0143] In this embodiment, a first portion of the first metal plate has a first end (e.g., first end E1) located on the side opposite to the wiring component. A third portion of the second metal plate has a second end (e.g., second end E2) located on the side opposite to the wiring component. The first end and the second end are positioned in the same direction. With this configuration, compared to a case where the first end and the second end are not aligned, the size of the connecting element can be reduced while increasing its thermal capacity. This configuration also allows for a reduction in the size of the electrical connection unit.

[0144] In this embodiment, the second portion of the first metal plate has a third end (e.g., third end E3) located on the side opposite to the electronic component. The fourth portion of the second metal plate has a fourth end (e.g., fourth end E4) located on the side opposite to the electronic component. The third and fourth ends are positioned identically in the first direction. With this configuration, compared to a case where the third and fourth ends are not aligned, the size of the connecting element can be reduced while increasing its heat capacity. This configuration also allows for a reduction in the size of the electrical connection unit.

[0145] In this embodiment, the first and second metal plates extend upward beyond the side surface of the electronic component (e.g., side surface 21s). This configuration readily ensures a large heat capacity for the connecting element. Furthermore, this configuration allows for further improvement in the thermal characteristics of the electrical connection unit.

[0146] <7. Connecting elements in the second aspect>

[0147] Next, the connecting element 50Y of the second aspect will be described. The connecting element 50Y of the second aspect differs from the connecting element 50X of the first aspect in that a bent portion is added to the connecting element 50X of the first aspect. Note that, except for the construction described below, the construction of the connecting element 50Y of the second aspect is the same as that of the connecting element 50X of the first aspect described above.

[0148] <7.1 Example 1 of the connecting element in the second aspect>

[0149] Figure 8 This is a perspective view of Example 1, illustrating the connecting element 50Y in the second aspect. The connecting element 50Y of Example 1 includes a first metal plate 60 and a second metal plate 70. The connecting element 50Y is formed by overlapping the first metal plate 60 and the second metal plate 70.

[0150] (First metal plate)

[0151] The first metal plate 60 includes a first portion 61 and a second portion 62. In Example 1, the end of the first portion 61 in the horizontal direction (e.g., the Y direction) has a bent portion 64. For example, the bent portion 64 included in the first connecting element 50A bends from the end of the first portion 61 on the +Y direction side toward the +X direction side and extends along the X direction. On the other hand, the bent portion 64 included in the second connecting element 50B bends from the end of the first portion 61 on the -Y direction side toward the +X direction side and extends along the X direction. The bent portion 64 has a plate-like shape extending along both the X and Z directions. The bent portion 64 extends along the side surface 21s of the electronic component 20X. Figure 8 In the example shown, the bend 64 is located near the electronic component 20X. When viewed from the Y direction, the bend 64 at least partially overlaps with the electronic component 20X. The bend 64 is an example of a "first bend". Note that, similar to the connecting element 50X of the first aspect, the first portion 61 and the second portion 62 of the first metal plate 60 may extend beyond the side surface 21s of the electronic component 20X in the Y direction. That is, the bend 64 is not limited to being located near the electronic component 20X, but may be located away from the electronic component 20X.

[0152] (Second metal plate)

[0153] The second metal plate 70 includes a third portion 71 and a fourth portion 72. In Example 1, the end of the third portion 71 in the horizontal direction (e.g., the Y direction) has a bend 74. For example, the bend 74 included in the first connecting element 50A bends from the end of the third portion 71 on the +Y direction side toward the +X direction side and extends along the X direction. On the other hand, the bend 74 included in the second connecting element 50B bends from the end of the third portion 71 on the -Y direction side toward the +X direction side and extends along the X direction. That is, in Example 1, the bend 64 and the bend 74 bend in the same direction. The bend 74 has a plate-like shape extending along both the X and Z directions. Figure 8 In the example shown, the bend 74 is located near the electronic component 20X. The bend 74 of the second metal plate 70 overlaps with the bend 64 of the first metal plate 60 from the side opposite to the electronic component 20X. The bend 74 is an example of a "second bend". Note that, similar to the connecting element 50X of the first aspect, the third portion 71 and the fourth portion 72 of the second metal plate 70 may extend beyond the side surface 21s of the electronic component 20X in the Y direction. That is, the bend 74 is not limited to being located near the electronic component 20X, but may be located away from the electronic component 20X.

[0154] <7.2 Example 2 of the connecting element in the second aspect>

[0155] Figure 9 This is a perspective view of Example 2, illustrating the connecting element 50Y in the second aspect. The connecting element 50Y in Example 2 includes a first metal plate 60 and a second metal plate 70. The connecting element 50Y is formed by overlapping the first metal plate 60 and the second metal plate 70.

[0156] (First metal plate)

[0157] The first metal plate 60 includes a first portion 61 and a second portion 62. In Example 2, as in Example 1, the end of the first portion 61 in the horizontal direction (e.g., the Y direction) has a bend 64. For example, the bend 64 included in the first connecting element 50A bends from the end of the first portion 61 on the +Y direction side toward the +X direction side and extends along the X direction. On the other hand, the bend 64 included in the second connecting element 50B bends from the end of the first portion 61 on the -Y direction side toward the +X direction side and extends along the X direction. The bend 64 extends along the side surface 21s of the electronic component 20X. Figure 9In the example shown, the bend 64 is located near the electronic component 20X. The bend 64 is an example of a "first bend". Note that, similar to the connecting element 50X in the first aspect, the first portion 61 of the first metal plate 60 may extend beyond the side surface 21s of the electronic component 20X in the Y direction. That is, the bend 64 is not limited to being located near the electronic component 20X, but may be located away from the electronic component 20X.

[0158] In this example, the second portion 62 extends beyond the bend 64 in the Y direction and away from the electronic component 20X. For example, the second portion 62 included in the first connecting element 50A extends beyond the bend 64 in the +Y direction. On the other hand, the second portion 62 included in the second connecting element 50B extends beyond the bend 64 in the -Y direction. Note that, instead of the above example, the second portion 62 may not extend beyond the bend 64 in the Y direction. The length (width) of the second portion 62 in the Y direction may be the same as the length (width) of the first portion 61 in the Y direction.

[0159] (Second metal plate)

[0160] The second metal plate 70 includes a third portion 71 and a fourth portion 72. In Example 2 of the connecting element 50Y, the bent portion 74 is not provided. The second metal plate 70 has the same shape as the second metal plate 70 described in the first aspect.

[0161] In this example, the third portion 71 of the second metal plate 70 extends beyond the bend 64 in the Y direction and away from the electronic component 20X. For example, the third portion 71 included in the first connecting element 50A extends beyond the bend 64 in the +Y direction. On the other hand, the third portion 71 included in the second connecting element 50B extends beyond the bend 64 in the -Y direction. That is, the third portion 71 of the second metal plate 70 includes a portion that does not overlap with the first metal plate 60. According to this configuration, the heat dissipation area exposed to air in the connecting element 50Y is increased.

[0162] Similarly, the fourth portion 72 of the second metal plate 70 extends beyond the bend 64 in the Y direction and away from the electronic component 20X. For example, the fourth portion 72 included in the first connecting element 50A extends beyond the bend 64 in the +Y direction. On the other hand, the fourth portion 72 included in the second connecting element 50B extends beyond the bend 64 in the -Y direction.

[0163] Note that, instead of the example above, the second metal plate 70 may extend in the Y direction no more than the bend 64. The length (width) of the second metal plate 70 in the Y direction may be the same as the length (width) of the first portion 61 of the first metal plate 60 in the Y direction.

[0164] <7.3 Example 3 of the connecting element in the second aspect>

[0165] Figure 10 This is a perspective view of Example 3, illustrating the connecting element 50Y in the second aspect. The connecting element 50Y in Example 3 includes a first metal plate 60 and a second metal plate 70. The connecting element 50Y is formed by overlapping the first metal plate 60 and the second metal plate 70.

[0166] (First metal plate)

[0167] The first metal plate 60 includes a first portion 61 and a second portion 62. In Example 3, the bent portion 64 is not provided. The first metal plate 60 has the same shape as the first metal plate 60 described in the first aspect above.

[0168] (Second metal plate)

[0169] The second metal plate 70 includes a third portion 71 and a fourth portion 72. In Example 3, as in Example 1, the end of the third portion 71 in the horizontal direction (e.g., the Y direction) has a bend 74. For example, the bend 74 included in the first connecting element 50A bends from the end of the third portion 71 on the +Y direction side toward the +X direction side and extends along the X direction. On the other hand, the bend 74 included in the second connecting element 50B bends from the end of the third portion 71 on the -Y direction side toward the +X direction side and extends along the X direction. The bend 74 is an example of a "first bend".

[0170] <7.4 Example 4 of the connecting element in the second aspect>

[0171] Figure 11 This is a perspective view of Example 4, illustrating the connecting element 50Y in the second aspect. The connecting element 50Y in Example 4 includes a first metal plate 60 and a second metal plate 70. The connecting element 50Y is formed by overlapping the first metal plate 60 and the second metal plate 70.

[0172] (First metal plate)

[0173] The first metal plate 60 includes a first portion 61 and a second portion 62. In Example 4, the end of the first portion 61 in the horizontal direction (e.g., the Y direction) has a bend 64. For example, the bend 64 included in the first connecting element 50A bends from the end of the first portion 61 on the +Y direction side toward the -X direction side and extends along the X direction. On the other hand, the bend 64 included in the second connecting element 50B bends from the end of the first portion 61 on the -Y direction side toward the -X direction side and extends along the X direction. The bend 64 has a plate-like shape extending along both the X and Z directions. The bend 64 at least partially overlaps with the fastening member 31 when viewed from the Y direction. The bend 64 is an example of a "first bend". Note that, similar to the connecting element 50X of the first aspect, the first portion 61 and the second portion 62 of the first metal plate 60 may extend beyond the side surface 21s of the electronic component 20X in the Y direction.

[0174] (Second metal plate)

[0175] The second metal plate 70 includes a third portion 71 and a fourth portion 72. In Example 4, the end of the third portion 71 in the horizontal direction (e.g., the Y direction) has a bend 74. For example, the bend 74 included in the first connecting element 50A bends from the end of the third portion 71 on the +Y direction side toward the -X direction side and extends along the X direction. On the other hand, the bend 74 included in the second connecting element 50B bends from the end of the third portion 71 on the -Y direction side toward the -X direction side and extends along the X direction. That is, in Example 4, the bend 64 and the bend 74 bend in the same direction. The bend 74 has a plate-like shape extending along both the X and Z directions. The bend 74 of the second metal plate 70 overlaps with the bend 64 of the first metal plate 60 from the side opposite to the fastening member 31. The bend 74 is an example of a "second bend". Note that, similar to the connecting element 50X in the first aspect, the third portion 71 and the fourth portion 72 of the second metal plate 70 may extend in the Y direction beyond the side surface 21s of the electronic element 20X.

[0176] <7.5 Example 5 of the connecting element in the second aspect>

[0177] Figure 12 This is a perspective view of Example 5, illustrating the connecting element 50Y in the second aspect. The connecting element 50Y in Example 5 includes a first metal plate 60 and a second metal plate 70. The connecting element 50Y is formed by overlapping the first metal plate 60 and the second metal plate 70.

[0178] (First metal plate)

[0179] The first metal plate 60 includes a first portion 61 and a second portion 62. In Example 5 of the connecting element 50Y, the bent portion 64 is not provided. The first metal plate 60 has the same shape as the first metal plate 60 described in the first aspect above.

[0180] In this example, the first portion 61 of the first metal plate 60 extends beyond the bend 74 of the second metal plate 70 in the Y direction and away from the electronic component 20X. For example, the first portion 61 included in the first connecting element 50A extends beyond the bend 74 of the second metal plate 70 in the +Y direction. On the other hand, the first portion 61 included in the second connecting element 50B extends beyond the bend 74 of the second metal plate 70 in the -Y direction. That is, the first portion 61 of the first metal plate 60 includes a portion that does not overlap with the second metal plate 70. According to this configuration, the heat dissipation area exposed to air in the connecting element 50Y is increased.

[0181] Similarly, the second portion 62 of the first metal plate 60 extends beyond the bend 74 of the second metal plate 70 in the Y direction and away from the electronic component 20X. For example, the second portion 62 included in the first connecting element 50A extends beyond the bend 74 of the second metal plate 70 in the +Y direction. On the other hand, the second portion 62 included in the second connecting element 50B extends beyond the bend 74 of the second metal plate 70 in the -Y direction.

[0182] Note that, instead of the example above, the first metal plate 60 may not extend beyond the bend 74 of the second metal plate 70 in the Y direction. The length (width) of the first metal plate 60 in the Y direction may be the same as the length (width) of the third portion 71 of the second metal plate 70 in the Y direction.

[0183] (Second metal plate)

[0184] The second metal plate 70 includes a third portion 71 and a fourth portion 72. In Example 5, the end of the third portion 71 in the horizontal direction (e.g., the Y direction) has a bend 74. For example, the bend 74 included in the first connecting element 50A bends from the end of the third portion 71 on the +Y direction side toward the -X direction side and extends along the X direction. On the other hand, the bend 74 included in the second connecting element 50B bends from the end of the third portion 71 on the -Y direction side toward the -X direction side and extends along the X direction. The bend 74 has a plate-like shape extending along both the X and Z directions. The bend 74 is an example of a "first bend". Note that, similar to the connecting element 50X of the first aspect, the third portion 71 of the second metal plate 70 may extend beyond the side surface 21s of the electronic component 20X in the Y direction.

[0185] In this example, the fourth portion 72 extends beyond the bend 74 in the Y direction and away from the electronic component 20X. For example, the fourth portion 72 included in the first connecting element 50A extends beyond the bend 74 in the +Y direction. On the other hand, the fourth portion 72 included in the second connecting element 50B extends beyond the bend 74 in the -Y direction. Note that, instead of the above example, the fourth portion 72 may not extend beyond the bend 74 in the Y direction. The length (width) of the fourth portion 72 in the Y direction may be the same as the length (width) of the third portion 71 in the Y direction.

[0186] <7.6 Example 6 of the connecting element in the second aspect>

[0187] Figure 13 This is a perspective view of Example 6, illustrating the connecting element 50Y in the second aspect. The connecting element 50Y in Example 6 includes a first metal plate 60 and a second metal plate 70. The connecting element 50Y is formed by overlapping the first metal plate 60 and the second metal plate 70.

[0188] (First metal plate)

[0189] The first metal plate 60 includes a first portion 61 and a second portion 62. In Example 6, the end of the first portion 61 in the horizontal direction (e.g., the Y direction) has a bend 64. For example, the bend 64 included in the first connecting element 50A bends from the end of the first portion 61 on the +Y direction side toward the +X direction side and extends along the X direction. On the other hand, the bend 64 included in the second connecting element 50B bends from the end of the first portion 61 on the -Y direction side toward the +X direction side and extends along the X direction. The bend 64 has a plate-like shape extending along the X and Z directions. The bend 64 extends along the side surface of the electronic component 20X. When viewed from the Y direction, the bend 64 at least partially overlaps with the electronic component 20X. The bend 64 is an example of a "first bend".

[0190] (Second metal plate)

[0191] The second metal plate 70 includes a third portion 71 and a fourth portion 72. In Example 4, the end of the third portion 71 in the horizontal direction (e.g., the Y direction) has a bend 74. For example, the bend 74 included in the first connecting element 50A bends from the end of the third portion 71 on the +Y direction side toward the -X direction side and extends along the X direction. On the other hand, the bend 74 included in the second connecting element 50B bends from the end of the third portion 71 on the -Y direction side toward the -X direction side and extends along the X direction. That is, in Example 4, the bend 64 and the bend 74 bend in different directions (e.g., opposite directions). The bend 74 has a plate-like shape extending along the X and Z directions. The bend 74 is an example of a "second bend".

[0192] Note that, similar to the connecting element 50X in the first aspect, each of the first metal plate 60 and the second metal plate 70 can extend beyond the side surface 21s of the electronic component 20X in the Y direction. That is, the bent portion 64 is not limited to being disposed near the electronic component 20X, but can be disposed away from the electronic component 20X.

[0193] <7.7 Example 7 of the connecting element in the second aspect>

[0194] Figure 14 This is a perspective view of Example 7, illustrating the connecting element 50Y in the second aspect. The connecting element 50Y in Example 7 includes a first metal plate 60 and a second metal plate 70. The connecting element 50Y is formed by overlapping the first metal plate 60 and the second metal plate 70.

[0195] (First metal plate)

[0196] The first metal plate 60 includes a first portion 61 and a second portion 62. In Example 7, the end of the first portion 61 in the vertical direction (e.g., the Z direction) has a bend 64. The bend 64 bends from the end of the first portion 61 on the +Z direction side toward the +X direction side and extends along the X direction. The bend 64 has a plate-like shape extending along both the X and Y directions. The bend 64 extends along the upper surface of the electronic component 20X. When viewed from the Z direction, the bend 64 at least partially overlaps with the electronic component 20X. The bend 64 is an example of a "first bend".

[0197] (Second metal plate)

[0198] The second metal plate 70 includes a third portion 71 and a fourth portion 72. In Example 7, the end of the third portion 71 in the vertical direction (e.g., the Z direction) has a bend 74. The bend 74 bends from the end of the third portion 71 on the +Z direction side toward the +X direction side and extends along the X direction. That is, in Example 7, the bend 64 and the bend 74 bend in the same direction. The bend 74 has a plate-like shape extending along both the X and Y directions. The bend 74 of the second metal plate 70 overlaps with the bend 64 of the first metal plate 60 from the side opposite to the electronic component 20X. The bend 74 is an example of a "second bend".

[0199] Note that, similar to the connecting element 50X in the first aspect, each of the first metal plate 60 and the second metal plate 70 may extend beyond the side surface 21s of the electronic element 20X in the Y direction. For example, the bends 64 and 74 may extend beyond the side surface 21s of the electronic element 20X in the Y direction. Furthermore, the connecting element 50Y is not limited to including both the bends 64 and 74, and may include only one of the bends 64 and 74.

[0200] <7.8 Example 8 of the connecting element in the second aspect>

[0201] Figure 15 This is a perspective view of Example 8, illustrating the connecting element 50Y in the second aspect. The connecting element 50Y in Example 8 includes a first metal plate 60 and a second metal plate 70. The connecting element 50Y is formed by overlapping the first metal plate 60 and the second metal plate 70.

[0202] (First metal plate)

[0203] The first metal plate 60 includes a first portion 61 and a second portion 62. In Example 8, the end of the first portion 61 in the vertical direction (e.g., the Z direction) has a bend 64. The bend 64 bends from the end of the first portion 61 on the +Z direction side toward the +X direction side and extends along the X direction. The bend 64 has a plate-like shape extending along both the X and Y directions. The bend 64 extends along the upper surface of the electronic component 20X. When viewed from the Z direction, the bend 64 at least partially overlaps with the electronic component 20X. The bend 64 is an example of a "first bend".

[0204] (Second metal plate)

[0205] The second metal plate 70 includes a third portion 71 and a fourth portion 72. In Example 8, the end of the third portion 71 in the vertical direction (e.g., the Z direction) has a bend 74. The bend 74 bends from the end of the third portion 71 on the +Z direction side toward the -X direction side and extends along the X direction. That is, in Example 8, the bend 64 and the bend 74 bend in different directions (e.g., opposite directions). The bend 74 has a plate-like shape extending along the X and Y directions. The bend 74 is an example of a "second bend".

[0206] Note that, similar to the connecting element 50X in the first aspect, each of the first metal plate 60 and the second metal plate 70 may extend beyond the side surface 21s of the electronic element 20X in the Y direction. For example, the bends 64 and 74 may extend beyond the side surface 21s of the electronic element 20X in the Y direction. Furthermore, the connecting element 50Y is not limited to including both the bends 64 and 74, and may include only one of the bends 64 and 74.

[0207] <7.9 Advantages of the connecting elements in the second aspect>

[0208] As a comparative example, consider a connecting element consisting of two overlapping L-shaped metal plates. For example, one could imagine... Figure 8 The structure shown does not contain the connecting elements for the bends 64 and 74. In such connecting elements, there is room for improvement from the perspective of thermal characteristics (heat storage and / or heat dissipation).

[0209] In this embodiment, the end of the first metal plate (e.g., first metal plate 60) or the end of the second metal plate (e.g., second metal plate 70) has a first bend (e.g., bend 64 or bend 74). According to this configuration, from a first perspective, compared to a metal plate without the first bend, a larger heat capacity is ensured, and the thermal characteristics (e.g., heat storage) of the connecting element are improved. Furthermore, from a second perspective, when the first bend is separated from the other metal plate, compared to a structure where two L-shaped metal plates overlap completely, a larger heat dissipation area exposed to air is ensured, and the thermal characteristics (e.g., heat dissipation) of the connecting element are improved. Through the effect of at least one of the first or second angles described above, the thermal characteristics of the electrical connection unit can be improved.

[0210] In some examples, the end of the first metal plate has a first bend (e.g., bend 64). The end of the second metal plate has a second bend (e.g., bend 74). With this configuration, a large heat capacity is ensured compared to a configuration in which only one of the first and second metal plates has a bend, and the thermal characteristics (e.g., heat storage capacity) of the connecting element are improved.

[0211] In some examples, the second bend is arranged to overlap with the first bend. This configuration reduces the size of the connecting element and / or improves assemblability compared to cases where the first and second bends are bent in different directions.

[0212] In some examples, the second bend bends in a different direction than the first bend. With this configuration, compared to a configuration where the first and second bends are arranged in an overlapping manner, the heat dissipation area in contact with air can be increased, and the thermal characteristics (e.g., heat dissipation) of the connecting element can be easily improved.

[0213] In some examples, when viewed from a first direction, a first portion of the first metal plate and a third portion of the second metal plate at least partially overlap with the electronic component. When viewed from a second direction different from the first direction, the first bend at least partially overlaps with the electronic component. With this configuration, the connecting element is housed around the electronic component, and the size of the electrical connection unit can be easily reduced.

[0214] <8. Connecting elements in the third aspect>

[0215] Next, the connecting element 50Z of the third aspect will be described. The connecting element 50Z of the third aspect differs from the connecting element 50X of the first aspect in that the second metal plate 80 is fitted to the first metal plate 60. Note that, except for the construction described below, the construction of the connecting element 50Z of the third aspect is the same as that of the connecting element 50X of the first aspect described above.

[0216] <8.1 Example 1 of the connecting element in the third aspect>

[0217] Figure 16 This is a perspective view of Example 1, illustrating the connecting element 50Z in the third aspect. The connecting element 50Z of Example 1 includes a first metal plate 60 and a second metal plate 80. The connecting element 50Z is formed by overlapping the first metal plate 60 and the second metal plate 80.

[0218] (First metal plate)

[0219] Similar to the first metal plate 60 of the connecting element 50X in the first aspect, the first metal plate 60 includes a first portion 61 and a second portion 62. In this example, the second portion 62 of the first metal plate 60 is fixed to the busbar 40 without the use of the fastening member 43. For example, the second portion 62 of the first metal plate 60 is fixed to the busbar 40 by welding or riveting. In the case of welding, the second portion 62 of the first metal plate 60 is fixed to the busbar 40 by, for example, laser welding. In the case of riveting, for example, holes for fixing are provided in the busbar 40, and a portion of the second portion 62 of the first metal plate 60 is pressed into the holes by stamping or the like, thereby fixing the second portion 62 of the first metal plate 60 to the busbar 40. The first metal plate 60 is an example of a "first metal component". Note that a "first metal component" can be a component formed by forging, casting, cutting, etc., rather than a metal plate.

[0220] (Second metal plate)

[0221] The second metal plate 80 is a metal plate that is fitted to the second portion 62 of the first metal plate 60 by means of a mating. The second metal plate 80 has a recess 80g, into which the second portion 62 of the first metal plate 60 fits. Furthermore, the second metal plate 80 is fitted to the second portion 62 of the first metal plate 60 by fitting the second portion 62 of the first metal plate 60 into the recess 80g. The second metal plate 80 is an example of a "second metal component." Note that a "second metal component" can be a component formed by forging, casting, cutting, etc., rather than a metal plate.

[0222] In this example, the second metal plate 80 includes a base 81, a first bent portion 82, and a second bent portion 83. The base 81 has a plate-like shape extending along the X and Y directions. The base 81 faces the second portion 62 of the first metal plate 60 from the side opposite to the busbar 40. The base 81 has a first end 81e1 as the end on the +Y direction side and a second end 81e2 as the end on the -Y direction side. The second end 81e2 is the end located on the opposite side of the first end 81e1 in the Y direction.

[0223] The first curved portion 82 is the portion that bends from the first end 81e1 of the base 81 toward the -Z direction. The first curved portion 82 extends in the X direction along the side surface (first side surface) of the second portion 62 of the first metal plate 60. The first curved portion 82 contacts the first side surface of the second portion 62 of the first metal plate 60 from the +Y direction side.

[0224] The second bend 83 is the portion that bends from the second end 81e2 of the base 81 toward the -Z direction. The second bend 83 extends in the X direction along the side surface (second side surface) of the second portion 62 of the first metal plate 60. The second bend 83 is located on the side opposite to the first bend 82 relative to the second portion 62 of the first metal plate 60. The second bend 83 contacts the second side surface of the second portion 62 of the first metal plate 60 from the -Y direction side.

[0225] In this example, the aforementioned recess 80g is formed between the first curved portion 82 and the second curved portion 83. In this example, in the second metal plate 80, the second portion 62 of the first metal plate 60 is inserted into the recess 80g, thereby sandwiching the second portion 62 of the first metal plate 60 between the first curved portion 82 and the second curved portion 83. With this structure, the second metal plate 80 is fixed to the second portion 62 of the first metal plate 60. In this example, the second metal plate 80 is arranged to overlap the second portion 62 of the first metal plate 60 from the side opposite to the busbar 40. The base 81 of the second metal plate 80 contacts the second portion 62 of the first metal plate 60 from the side opposite to the busbar 40.

[0226] In this example, the second metal plate 80 is bent by, for example, stamping, to have a base 81, a first bent portion 82, and a second bent portion 83. In this example, the thickness T1 of the first metal plate 60 and the thickness T2 of the second metal plate 80 are equal (see...). Figure 19 The thickness T1 of the first metal plate 60 and the thickness T2 of the second metal plate 80 are each, for example, 3 mm. For example, when the thickness and material of the first metal plate 60 and the second metal plate 80 are the same as the thickness and material of the metal plate 41 of the busbar 40, the metal plate 41, the first metal plate 60, and the second metal plate 80 can be manufactured from the same material. In this case, it is easy to further reduce the manufacturing cost (e.g., material procurement cost) of the electrical connection unit 1.

[0227] Figure 17 This is a partially exploded perspective view showing the electrical connection unit of the third aspect. Figure 18 This is a plan view showing a portion of the electrical connection unit of the third aspect. In this example, the second portion 62 of the first metal plate 60 has a first notch 62c1 and a second notch 62c2.

[0228] A first notch 62c1 is provided at the end of the second portion 62 of the first metal plate 60 on the +Y direction side. The width of the first notch 62c1 in the Y direction is, for example, equal to the width of the first bent portion 82 of the second metal plate 80 in the Y direction. The first notch 62c1 extends in the X direction. The first bent portion 82 of the second metal plate 80 is arranged in the first notch 62c1.

[0229] The second notch 62c2 is provided at the end of the second portion 62 of the first metal plate 60 on the -Y direction side. The width of the second notch 62c2 in the Y direction is, for example, equal to the width of the second curved portion 83 of the second metal plate 80 in the Y direction. The second notch 62c2 extends in the X direction. The second curved portion 83 of the second metal plate 80 is arranged in the second notch 62c2.

[0230] Figure 19 This is a cross-sectional view showing a portion of the electrical connection unit 1 in the third aspect. In this example, the width W32 of the second portion 62 of the first metal plate 60 in the Y direction is smaller than the width W31 of the first portion 61 of the first metal plate 60 in the Y direction. According to this configuration, even in a structure where the second metal plate 80 is mounted to the second portion 62 of the first metal plate 60, it is easy to ensure the gap (insulation distance) between the second metal plate 80 of the first connecting element 50A and the second metal plate 80 of the second connecting element 50B.

[0231] <8.2 Example 2 of the connecting element in the third aspect>

[0232] Figure 20 This is a perspective view of Example 2, illustrating the connecting element 50Z in the third aspect. The connecting element 50Z in Example 2 includes a first metal plate 60 and a second metal plate 80. The connecting element 50Z is formed by overlapping the first metal plate 60 and the second metal plate 80.

[0233] In this example, similar to the connecting element 50X in the first aspect, the second portion 62 of the first metal plate 60 is secured to the busbar 40 by a fastening member 43. The fastening member 43 protrudes from the second portion 62 of the first metal plate 60 in the +Z direction.

[0234] In this example, the base 81 of the second metal plate 80 has an opening 81h, into which the fastening member 43 and the engaging member 44 are inserted. When viewed from the Z direction, the opening 81h is larger than the fastening member 43 and the engaging member 44. Because of the opening 81h, the base 81 of the second metal plate 80 is arranged to overlap with the second portion 62 of the first metal plate 60, while avoiding interference with the fastening member 43 and the engaging member 44. The opening 81h is an example of an "insertion portion." Note that an "insertion portion" is not limited to the opening 81h, and can also be a notch or the like provided in the base 81.

[0235] Figure 21This is a cross-sectional view showing a portion of the electrical connection unit in the third aspect. In this example, the base 81 of the second metal plate 80 is configured to overlap the second portion 62 of the first metal plate 60 from the side opposite to the busbar 40. The base 81 of the second metal plate 80 contacts the second portion 62 of the first metal plate 60 from the side opposite to the busbar 40 at a position avoiding the fastening member 43 and the engagement member 44.

[0236] <8.3 Example 3 of the connecting element in the third aspect>

[0237] Figure 22 This is a perspective view of Example 3, illustrating the connecting element 50Z in the third aspect. The connecting element 50Z in Example 3 includes a first metal plate 60 and a second metal plate 80. The connecting element 50Z is formed by overlapping the first metal plate 60 and the second metal plate 80.

[0238] In this example, similar to the connecting element 50X in the first aspect, the second portion 62 of the first metal plate 60 is secured to the busbar 40 by a fastening member 43. The fastening member 43 protrudes from the second portion 62 of the first metal plate 60 in the +Z direction.

[0239] In this example, the base 81 of the second metal plate 80 is located on the side opposite to the busbar 40 relative to the second portion 62 of the first metal plate 60. The base 81 of the second metal plate 80 is arranged separately from the second portion 62 of the first metal plate 60 on the +Z direction side. A gap S1 in the Z direction is provided between the base 81 of the second metal plate 80 and the second portion 62 of the first metal plate 60. The gap S1 is a space for accommodating a portion of the fastening member 43 and the engaging member 44.

[0240] Figure 23 This is a cross-sectional view showing a portion of the electrical connection unit in the third aspect. As described above, a gap S1 in the Z direction is provided between the base 81 of the second metal plate 80 and the second portion 62 of the first metal plate 60. Because of the gap S1, interference between the base 81 of the second metal plate 80 and the fastening member 43 and the joining member 44 is prevented. A heat transfer member 91 may be provided in the gap S1, which thermally connects the base 81 of the second metal plate 80 to the second portion 62 of the first metal plate 60. The heat transfer member 91 is, for example, a component formed of a material with better thermal conductivity than the base member 15. The heat transfer member 91 is, for example, an elastic insulating component.

[0241] <8.4 Example 4 of the connecting element in the third aspect>

[0242] Figure 24This is a perspective view of Example 4, illustrating the connecting element 50Z in the third aspect. The connecting element 50Z in Example 4 includes a first metal plate 60 and a second metal plate 80. The connecting element 50Z is formed by overlapping the first metal plate 60 and the second metal plate 80.

[0243] In this embodiment, the base 81 (first base 81A) corresponding to the first connecting element 50A and the base 81 (second base 81B) corresponding to the second connecting element 50B are formed by a second metal plate 80. For example, the second metal plate 80 includes the first base 81A, the second base 81B, the first bent portion 82, the second bent portion 83, and the insulating portion 84.

[0244] Each of the first base 81A and the second base 81B has a plate-like shape extending along the X and Y directions. The first base 81A faces the second portion 62 of the first metal plate 60 of the first connecting element 50A from the side opposite to the busbar 40A. The second base 81B faces the second portion 62 of the first metal plate 60 of the second connecting element 50B from the side opposite to the busbar 40B.

[0245] The first bent portion 82 is the portion that bends from the end of the second metal plate 80 in the +Y direction towards the -Z direction. The first bent portion 82 contacts the first side surface (the side surface in the +Y direction) of the second portion 62 of the first metal plate 60 of the first connecting element 50A from the +Y direction side.

[0246] The second bend 83 is the portion that bends from the end of the second metal plate 80 in the -Y direction towards the -Z direction. The second bend 83 contacts the second side surface (side surface in the -Y direction) of the second portion 62 of the first metal plate 60 of the second connecting element 50B from the -Y direction side.

[0247] An insulating portion 84 is disposed between the first base 81A and the second base 81B, thereby electrically insulating the first base 81A and the second base 81B from each other. The insulating portion 84 is made of, for example, synthetic resin. In this example, the metal plate including the first base 81A and the first curved portion 82, the metal plate including the second base 81B and the second curved portion 83, and the insulating portion 84 are integrally formed by insert molding or the like.

[0248] Figure 25This is a cross-sectional view showing a portion of the electrical connection unit in the third aspect. In this example, a second metal plate 80 is fitted to a second portion 62 of the first metal plate 60 of the first connecting element 50A and a second portion 62 of the first metal plate 60 of the second connecting element 50B. The second metal plate 80 has a recess 80g in which the second portions 62 of the first metal plate 60 of the first connecting element 50A and the second portions 62 of the first metal plate 60 of the second connecting element 50B fit. Furthermore, the second metal plate 80 is fitted to the second portion 62 of the first metal plate 62 by fitting the second portions 62 of the first metal plate 60 of the first connecting element 50A and the second portions 62 of the first metal plate 60 of the second connecting element 50B into the recess 80g.

[0249] Note that the second metal plate 80 in Example 4 is not limited to the examples described above. The second metal plate 80 in Example 4 may have an opening 81h as in Example 2, or a gap S1 may be formed between the second metal plate 80 and the second portion 62 of the first metal plate 60 as in Example 3.

[0250] <8.5 Advantages of the connecting elements in the third aspect>

[0251] As a comparative example, a connecting element in which a second metal component (e.g., a second metal plate 80) is absent will be considered. In such a connecting element, there is room for improvement from the perspective of thermal characteristics (e.g., heat storage and / or heat dissipation). Furthermore, when increasing the number of metal components with thermal characteristics by fastening them together, the size of the fastening components may need to be increased to ensure the fastening force used to fasten multiple components.

[0252] In this embodiment, the second metal component (e.g., the second metal plate 80) has a recess (e.g., recess 80g), and a second portion of the first metal component (e.g., the second portion 62 of the first metal plate 60) fits into the recess. The second metal component is attached to the second portion of the first metal component.

[0253] With this configuration, the presence of a second metal component in addition to the first metal component improves the thermal characteristics (e.g., heat storage and / or heat dissipation) of the connecting element. This configuration also improves the thermal characteristics (e.g., heat storage and / or heat dissipation) of the electrical connection unit. Furthermore, since the first and second metal components are not fastened together to the wiring component, the increase in the size of the fastening component is prevented. Compared to a structure where the first and second metal components are fastened together to the wiring component, this configuration reduces the size and / or cost of the electrical connection unit.

[0254] In this embodiment, the first metal component is a metal plate having a base (e.g., base 81), a first curved portion (e.g., first curved portion 82) bending from a first end of the base, and a second curved portion (e.g., second curved portion 83) bending from a second end of the base opposite to the first end and forming a recess between the first curved portion and itself. With this configuration, the second metal component can be formed from a metal plate. In this case, compared to the case where the second metal component is a forged product, the cost of the electrical connection unit can be reduced.

[0255] In at least one example, the second portion is fixed to the wiring component (e.g., busbar 40) by welding or riveting. The second metal component is arranged to overlap the second portion from the side opposite to the wiring component. With this configuration, it is easy to arrange the second metal component near the first metal component and to easily improve the thermal conductivity between the second and first metal components. This configuration further improves the thermal characteristics of the electrical connection unit.

[0256] In at least one example, the second part is secured to the wiring component by a second fastening member. The metal component has an insertion portion (e.g., an opening 81h) through which the second fastening member passes. With this configuration, it is easy to arrange the second metal component near the first metal component, and it is easy to improve the thermal conductivity between the second and first metal components. This allows for further improvement of the thermal characteristics of the electrical connection unit.

[0257] In at least one example, the second part is secured to the wiring component by a second fastening member (e.g., fastening member 43). The second metal member has a base located on the side opposite to the wiring component relative to the second part, and is fitted to the second part with a gap (e.g., gap S1) between the second part and the base to accommodate a portion of the second fastening member. With this configuration, the second metal member can be arranged while avoiding interference with the fastening member. Furthermore, the presence of the gap increases the heat dissipation area of ​​the connecting element.

[0258] Several embodiments and modifications have been described above. However, the embodiments and modifications are not limited to the examples described above. For example, the connecting elements 50 of the first to third aspects described above can be implemented in combination with each other. Furthermore, each modification of the first to third aspects described above can be implemented in combination with each other.

[0259] While preferred embodiments of the invention have been described and illustrated above, it should be understood that these are exemplary examples and should not be considered limiting. Additions, omissions, substitutions, and other changes can be made without departing from the scope of the invention. Therefore, the invention should not be considered limited to the foregoing description, but only to the scope of the appended claims.

Claims

1. An electrical connection unit, comprising: An electronic component having terminals; Wiring components; A first metal plate, comprising a first part and a second part, wherein the first part is fixed to the terminal by a first fastening member, and the second part is bent from the first part and fixed to the wiring member by a second fastening member; as well as The second metal plate includes a third portion and a fourth portion, the third portion being arranged to overlap with the first portion and fastened to the terminal by the first fastening member, and the fourth portion being bent from the third portion, arranged to overlap with the second portion and fastened to the wiring member by the second fastening member.

2. The electrical connection unit according to claim 1, wherein, The terminal is open in a first direction. The wiring component is arranged separately from the terminal in a second direction intersecting the first direction. The first portion of the first metal plate and the third portion of the second metal plate at least partially overlap with the electronic component when viewed from the first direction and extend in the second direction. The second portion of the first metal plate and the fourth portion of the second metal plate at least partially overlap with the wiring component when viewed from the second direction and extend in the first direction.

3. The electrical connection unit according to claim 2, wherein, The first portion of the first metal plate has a first end located on the side opposite to the wiring component. The third portion of the second metal plate has a second end located on the side opposite to the wiring component, and The first end and the second end are in the same position in the second direction.

4. The electrical connection unit according to claim 3, wherein, The second portion of the first metal plate has a third end located on the side opposite to the electronic component. The fourth portion of the second metal plate has a fourth end located on the side opposite to the electronic component, and The third end and the fourth end are in the same position in the first direction.

5. The electrical connection unit according to any one of claims 2 to 4, wherein, The direction that intersects both the first and second directions is considered to be the third direction. The first metal plate and the second metal plate extend upward beyond the side surface of the electronic component in the third party.

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