Electrical Equipment

Abstract

To miniaturize electric equipment.SOLUTION: Electric equipment 10 is provided, having: a case 11; an electronic component 16 having a terminal and disposed inside the case 11; and a bus bar 26 disposed inside the case 11 and laser-welded to a terminal 16A of the electronic component 16. The terminal 16A of the electronic component 16 overlaps with the bus bar 26. The case 11 has an opening 28 from which both or either of the terminal 16A of the electronic component 16 and the bus bar 26 expose or exposes to the outside of the case 11. The case 11 includes: a first sandwiching portion 30 which comes in contact with one of the terminal 16A of the electronic component 16 and the bus bar 26; and a second sandwiching portion 32 which comes in contact with the other of the terminal 16A of the electronic component 16 and the bus bar 26. The terminal 16A of the electronic component 16 and the bus bar 26 are sandwiched by the first sandwiching portion 30 and the second sandwiching portion 32, and the relative positions of the terminal 16A and the bus bar 26 are consequently held.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to electrical equipment. [Background technology]

[0002] A conventional electrical device is described in JP 2018-206601 A. This electrical device includes a base member, an electronic component disposed on the base member, and a bus bar connected to a terminal of the electronic component. The terminal of the electronic component and the bus bar are electrically connected by being fastened with bolts. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-206601 Summary of the Invention [Problem to be solved by the invention]

[0004] One possible method for connecting the terminals of an electronic component to a bus bar is laser welding. When the terminals of the electronic component and the bus bar are laser welded together, the terminals of the electronic component and the bus bar must be held in place so that they do not shift from one another. Therefore, a dedicated jig may be used to hold the relative positions of the terminals of the electronic component and the bus bar.

[0005] In recent years, there has been a demand for miniaturization of electrical devices. To achieve this, it is necessary to arrange electronic components on a circuit board at high density. However, this results in a problem in that the gaps between multiple electronic components arranged on an electrical device become relatively narrow, making it difficult to provide sufficient space for arranging jigs for holding terminals and bus bars of the electronic components.

[0006] The present disclosure was completed in light of the above circumstances, and has an object to provide a miniaturized electrical device. [Means for solving the problem]

[0007] The present disclosure relates to an electrical device comprising: a case; an electronic component disposed within the case and having terminals; and a bus bar disposed within the case and laser-welded to the terminals of the electronic component, wherein the terminals of the electronic component and the bus bar overlap; the case has an opening through which the terminals of the electronic component and / or the bus bar are exposed to the outside of the case; the case has a first clamping portion that contacts the terminals of the electronic component and one of the bus bar, and a second clamping portion that contacts the other terminal of the electronic component and the bus bar, and wherein the relative positions of the terminals of the electronic component and the bus bar are maintained by being clamped between the first clamping portion and the second clamping portion. [Effects of the Invention]

[0008] According to the present disclosure, electrical equipment can be made smaller. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an exploded perspective view showing an electric device according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing an electrical device. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is a partially enlarged perspective view showing the opening of the upper case. [Figure 5] FIG. 5 is a partially cutaway perspective view showing a protrusion provided on the upper case. [Figure 6] FIG. 6 is a partially enlarged perspective view showing the connection structure between the terminals of the fuse and the connection portions of the bus bars. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described.

[0011] (1) An electrical device according to the present disclosure includes a case, an electronic component disposed within the case and having terminals, and a bus bar disposed within the case and laser-welded to the terminals of the electronic component, the terminals of the electronic component and the bus bar overlapping each other, the case has an opening through which the terminals of the electronic component and / or the bus bar are exposed to the outside of the case, the case has a first clamping portion that contacts the terminals of the electronic component and one of the bus bar, and a second clamping portion that contacts the terminals of the electronic component and the other of the bus bar, and the relative positions of the terminals of the electronic component and the bus bar are maintained by being clamped between the first clamping portion and the second clamping portion.

[0012] The terminals of the electronic component and the busbar are clamped between a first clamping portion and a second clamping portion provided on the case, thereby maintaining their relative positions. This allows the terminals of the electronic component and the busbar to be laser-welded by irradiating the terminals or the busbar with laser light through the opening of the case. According to the present disclosure, no jig is required to maintain the relative positions of the terminals of the electronic component and the busbar, so there is no need to provide space for arranging the jig. As a result, the electrical device can be made smaller.

[0013] (2) It is preferable that the first clamping portion or the second clamping portion has a recess on a surface facing the terminal of the electronic component or the bus bar.

[0014] When the terminals of the electronic component and the bus bar are laser welded, even if the laser light penetrates the terminals of the electronic component and the bus bar, the first clamping portion or the second clamping portion is provided with a recess, thereby preventing the first clamping portion or the second clamping portion from being damaged by the laser light.

[0015] (3) It is preferable that the case has a lower case to which the electronic components are attached and an upper case that is attached to the lower case to cover the electronic components, and that the upper case has the first clamping portion and the lower case has the second clamping portion.

[0016] By simply assembling the lower case and the upper case, the terminals of the electronic component and the bus bars can be clamped by the first clamping portion and the second clamping portion.

[0017] (4) It is preferable that the upper case has an upper wall that covers the electronic components, the lower case has a bottom wall on which the electronic components are arranged, the upper wall of the upper case has a storage protrusion that protrudes away from the bottom wall of the lower case at a position corresponding to the electronic components and in which the electronic components are individually stored, and the first clamping portion is provided on the storage protrusion of the upper case and the second clamping portion is provided on the bottom wall of the lower case.

[0018] Since the electronic components are individually housed in the housing protrusions provided on the upper case, the upper case can be made smaller than when all the electronic components are covered by the upper case, thereby contributing to the overall miniaturization of the electrical device.

[0019] (5) It is preferable that the opening is provided in the accommodating protrusion of the upper case, and that the accommodating protrusion of the upper case has a protrusion located near the edge of the hole of the opening that protrudes toward the terminal or the bus bar of the electronic component and abuts against the terminal or the bus bar of the electronic component.

[0020] Since the terminals or bus bars of the electronic component are pressed by the protrusions, the relative positional deviation between the terminals of the electronic component and the bus bars is further suppressed.

[0021] (6) It is preferable that the upper case has a slit extending along the hole edge of the opening, and that the protrusion is provided in the area between the hole edge of the opening and the hole edge of the slit.

[0022] The region between the slit and the edge of the opening of the upper case elastically deforms, causing the protrusion to press against the terminal or bus bar of the electronic component, thereby further suppressing relative positional deviation between the terminal and the bus bar while complying with the tolerances set for the terminal and the bus bar of the electronic component.

[0023] (7) It is preferable that the upper case is attached to the lower case along an attachment direction, the normal to the plate surface of the terminal of the electronic component is perpendicular to the attachment direction, the normal to the plate surface of the bus bar is perpendicular to the attachment direction, and the first clamping portion and the second clamping portion are assembled to the terminal of the electronic component and the bus bar from the attachment direction.

[0024] By simply assembling the lower case and the upper case, the terminals of the electronic component and the bus bars can be clamped by the first clamping portion and the second clamping portion.

[0025] [Details of the embodiments of the present disclosure] The present disclosure will be described below with reference to exemplary embodiments. The present disclosure is not limited to these examples, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0026] <Embodiment 1> A first embodiment of the present disclosure will be described with reference to FIGS. 1 to 8. An electrical device 10 according to this embodiment is mounted on a vehicle (not shown), such as an electric vehicle or a hybrid vehicle, and turns on and off a current supplied from a power source (not shown). In the following description, the direction indicated by arrow Z is upward, the direction indicated by arrow Y is forward, and the direction indicated by arrow X is leftward as viewed from the front of arrow Y. In addition, for multiple identical components, only some of the components may be designated by reference numerals, and the reference numerals may be omitted for other components.

[0027] [Electrical Equipment 10] 1, an electric device 10 includes a case 11 and electronic components 16 disposed within the case 11. The case 11 has a lower case 12 disposed below the case 11 and an upper case 13 attached to the upper side of the lower case 12. The upper case 13 is attached to the lower case 12 from above (an example of an attachment direction).

[0028] The lower case 12 is made of insulating synthetic resin and is open at the top. The lower case 12 has a rectangular shape when viewed from above. The lower case 12 has a bottom wall 14 and a housing wall 15 extending upward from the top surface of the bottom wall 14. An electronic component 16 is housed in the space surrounded by the bottom wall 14 and the housing wall 15.

[0029] The upper case 13 is made of insulating synthetic resin and is open downward. The upper case 13 is formed to be slightly larger than the outer shape of the lower case 12. The upper case 13 has a top wall 17 and side walls 18 extending downward from the side edges of the top wall 17. When the lower case 12 and the upper case 13 are assembled, the side walls 18 of the upper case 13 are positioned outside the bottom wall 14 of the lower case 12.

[0030] The top wall 17 of the upper case 13 is formed with accommodating protrusions 19 that protrude upward and have a shape that follows the shape of the electronic components 16 at positions corresponding to the electronic components 16 attached to the lower case 12. As shown in FIG. 2 , the electronic components 16 are individually accommodated within the accommodating protrusions 19. A plurality of slits 20 are formed in the accommodating protrusions 19, spaced apart from one another, thereby providing communication between the inside and outside of the case 11. As a result, heat generated in the electronic components 16 when current flows through them is dissipated to the outside of the case 11 through the slits 20.

[0031] 1, a plurality of locking protrusions 21 protrude outward from the side surface of the bottom wall 14 of the lower case 12. Lock receiving portions 22 that elastically engage with the locking protrusions 21 are formed on the side wall 18 of the upper case 13 at positions corresponding to the locking protrusions 21 of the lower case 12. As shown in FIG. 3, the locking protrusions 21 and the lock receiving portions 22 elastically engage with each other, allowing the lower case 12 and the upper case 13 to be assembled together.

[0032] [Electronic Components 16] 1, the electronic component 16 has terminals 16A. The electronic component 16 attached to the lower case 12 includes a relay 23 and a fuse 24.

[0033] The relay 23 is electrically connected to a power supply and turns on and off the current supplied from the power supply. The relay 23 has a terminal (an example of the terminal 16A) (not shown). The relay 23 has a rectangular parallelepiped shape. A partition wall 25 extending in the vertical direction is formed to protrude from one side of the relay 23. Metal plate terminals are provided on both sides of the partition wall 25 on the side wall 18 of the relay 23 where the partition wall 25 is provided. The partition wall 25 provided between the two terminals determines the creepage distance between the two terminals. The normal to the terminals of the relay 23 is perpendicular to the vertical direction. Note that "perpendicular to the vertical direction" includes cases where the normal is perpendicular to the vertical direction and also includes cases where the normal can be deemed to be substantially perpendicular even when the normal is not perpendicular to the vertical direction. The terminals of the relay 23 and the bus bar 26 are electrically connected by laser welding the terminals to the bus bar 26.

[0034] The fuse 24 is configured to melt when a current greater than a predetermined current flows through the fuse 24. This prevents overcurrent from flowing from the power supply. The fuse 24 has an overall cylindrical shape extending in the front-to-rear direction. A terminal 24A (an example of the terminal 16A) extending forward is formed from the front end of the fuse 24, and a terminal 24A (an example of the terminal 16A) extending rearward is formed from the rear end of the fuse 24. The terminal 24A of the fuse 24 is made of a metal plate and has a rectangular shape when viewed from the left-to-right direction. A normal line of the terminal 24A of the fuse 24 is perpendicular to the up-down direction. The terminal 24A and the bus bar 26 are laser-welded together, thereby electrically connecting the terminal 24A and the bus bar 26.

[0035] [Busbar 26] 1, a plurality of bus bars 26 are arranged on the lower case 12. The bus bars 26 are fixed to the lower case 12 by known methods such as press fitting, adhesive bonding, screw fastening, or heat fusion. The bus bars 26 are formed by pressing a conductive metal plate into a predetermined shape. The metal constituting the bus bars 26 may be any metal, such as copper or a copper alloy.

[0036] The bus bar 26 overlaps the terminals of the relay 23 and the terminal 24A of the fuse 24, respectively. The bus bar 26 has connection portions 26A that are connected to the terminals of the relay 23 and the terminal 24A of the fuse 24, respectively. The bus bar 26 is disposed in the lower case 12 so that the normal of the connection portions 26A of the bus bar 26 is perpendicular to the up-down direction. The terminals of the relay 23 and the terminals 24A of the fuse 24 are laser-welded to the connection portions 26A of the bus bar 26. Weld marks 27 are formed on the bus bar 26A by laser welding. The shape of the weld marks 27 is not particularly limited, but in this embodiment they are formed in a substantially circular shape.

[0037] [Positioning structure between terminal 16A of electronic component 16 and bus bar 26] 2, an opening 28 is formed in the accommodating protrusion 19 of the upper case 13 at a position corresponding to the connection portion 26A of the bus bar 26, and passes through the accommodating protrusion 19. From the inside of the edge of the opening 28, the connection portion 26A of the bus bar 26 is exposed to the outside of the case 11. The shape of the edge of the opening 28 is not particularly limited, but in this embodiment it is rectangular.

[0038] In the following explanation, terminal 24A of fuse 24 and connection portion 26A of bus bar 26 overlapped on terminal 24A of fuse 24 will be taken as examples. For the terminal of relay 23 and connection portion 26A of bus bar 26 overlapped on terminal 24A of relay 23, similar members are denoted by the same reference numerals, and duplicate explanations will be omitted.

[0039] As shown in FIG. 4, the housing protrusion 19 of the upper case 13 has slits 29 extending in the vertical direction formed at positions slightly forward and rearward from the edge of the opening 28. The area of ​​the housing protrusion 19 of the upper case 13 defined by the edge of the opening 28 and the slits 29 is defined as a first clamping portion 30. The first clamping portion 30 is formed to be elongated and extend in the vertical direction. The first clamping portion 30 is formed as a doubly supported spring that is elastically deformable in the left-right direction. The first clamping portion 30 is formed on both the front and rear sides of the opening 28.

[0040] 5, first clamping portion 30 has a protrusion 31 formed near the center in the up-down direction on a surface facing connection portion 26A of bus bar 26. The protrusion 31 protrudes toward connection portion 26A of bus bar 26. When upper case 13 is assembled to lower case 12, the tip of protrusion 31 abuts connection portion 26A of bus bar 26 from the right.

[0041] 6, a wall-shaped second clamping portion 32 that protrudes upward is provided on the upper surface of the bottom wall 14 of the lower case 12 at a position corresponding to the terminal 24A of the fuse 24. The second clamping portion 32 is configured to abut against the terminal 24A of the fuse 24 from the left.

[0042] As shown in Figure 7, the second clamping portion 32 abuts against the terminal 24A of the fuse 24 from the left, and the first clamping portion 30 abuts against the connection portion 26A of the bus bar 26 that overlaps the terminal 24A of the fuse 24 from the right, so that the terminal 24A of the fuse 24 and the connection portion 26A of the bus bar 26 are clamped by the second clamping portion 32 and the first clamping portion 30.

[0043] 8, when the protrusion of first clamping portion 30 abuts against connection portion 26A of bus bar 26 from the right, first clamping portion 30 is configured to bend and deform so as to bulge to the right. This causes connection portion 26A of bus bar 26 to be pressed toward terminal 24A of fuse 24. This prevents the terminal 24A of fuse 24 and connection portion 26A of bus bar 26 from being misaligned relative to each other.

[0044] 7, a recess 33 recessed in a direction away from the terminal 24A of the fuse 24 is formed on the surface of the second clamping portion 32 facing the terminal 24A of the fuse 24. In the portion of the second clamping portion 32 where the recess 33 is formed, the second clamping portion 32 and the terminal 24A of the fuse 24 are separated from each other.

[0045] [Example of manufacturing process for electrical device 10] Next, a description will be given of an example of a manufacturing process for the electric device 10. The manufacturing process for the electric device 10 is not limited to the following description.

[0046] Electronic components 16 such as relays 23 and fuses 24 are fixed to the top surface of lower case 12. Next, bus bars 26 are fixed to the top surface of lower case 12. In this state, the terminals of relays 23 and connecting portions 26A of bus bars 26 overlap, and the terminals 24A of fuses 24 and connecting portions 26A of bus bars 26 overlap.

[0047] The upper case 13 is assembled to the lower case 12 from above. The lower end of the lock receiving portion 22 of the upper case 13 abuts against the lock protrusion 21 of the lower case 12 from above, causing the lock receiving portion 22 to elastically deform. The upper case 13 is further pressed downward, causing the lock receiving portion 22 to climb over the lock protrusion 21 and return to its original shape. As a result, the lock receiving portion 22 abuts against the lock protrusion 21 from below. This fixes the upper case 13 to the lower case 12.

[0048] When the lower case 12 and the upper case 13 are assembled together, the tip of the protrusion 31 provided on the first clamping portion 30 of the upper case 13 abuts against the terminal 24A of the fuse 24 from the right. The second clamping portion 32 of the lower case 12 abuts against the terminal 24A of the fuse 24 from the left. As a result, the terminal 24A of the fuse 24 and the connection portion 26A of the bus bar 26 are clamped by the first clamping portion 30 and the second clamping portion 32.

[0049] Laser light is irradiated from an irradiation device (not shown) through opening 28 of upper case 13. As a result, terminal 24A of fuse 24 and connection portion 26A of bus bar 26 are laser-welded together. Weld marks 27 are formed on connection portion 26A of bus bar 26. As a result, terminal 24A of fuse 24 and connection portion 26A of bus bar 26 are electrically connected together.

[0050] The terminals of the relays 23 and the connection portions 26A of the bus bars 26 are also laser welded in the same manner as above, and therefore a duplicated description will be omitted. With the above steps, the electric device 10 is completed.

[0051] [Effects of the embodiment] Next, the effects of this embodiment will be described. Electrical device 10 according to this embodiment includes case 11, electronic component 16 disposed within case 11 and having terminals, and bus bar 26 disposed within case 11 and laser-welded to terminal 16A of electronic component 16, terminal 16A of electronic component 16 overlapping bus bar 26, case 11 having opening 28 through which terminal 16A of electronic component 16 and / or bus bar 26 are exposed to the outside of case 11, case 11 has first clamping portion 30 that contacts one of terminal 16A of electronic component 16 and bus bar 26, and second clamping portion 32 that contacts the other of terminal 16A of electronic component 16 and bus bar 26, and the relative positions of terminal 16A of electronic component 16 and bus bar 26 are maintained by being clamped between first clamping portion 30 and second clamping portion 32.

[0052] The terminals 16A of the electronic component 16 and the bus bar 26 are clamped between a first clamping portion 30 and a second clamping portion 32 provided on the case 11, thereby maintaining their relative positions. As a result, the terminals 16A of the electronic component 16 and the bus bar 26 can be laser-welded by irradiating the terminals 16A of the electronic component 16 or the bus bar 26 with laser light from an opening 28 in the case 11. According to the present disclosure, no jig is needed to maintain the relative positions of the terminals 16A of the electronic component 16 and the bus bar 26, and therefore no space needs to be provided for arranging the jig. As a result, the electrical device 10 can be made smaller.

[0053] Furthermore, according to this embodiment, the second clamping portion 32 has a recess 33 on the surface facing the terminal 16A of the electronic component 16.

[0054] When the terminal 16A of the electronic component 16 and the bus bar 26 are laser welded together, even if the laser light penetrates the terminal 16A of the electronic component 16 and the bus bar 26, the recess 33 provided in the second clamping portion 32 prevents the second clamping portion 32 from being damaged by the laser light.

[0055] According to this embodiment, the case 11 has a lower case 12 to which the electronic components 16 are attached, and an upper case 13 that is attached to the lower case 12 to cover the electronic components 16, the upper case 13 having a first clamping portion 30, and the lower case 12 having a second clamping portion 32.

[0056] By simply assembling the lower case 12 and the upper case 13 together, the terminals 16A and the bus bars 26 of the electronic components 16 can be clamped by the first clamping portion 30 and the second clamping portion 32.

[0057] According to this embodiment, the upper case 13 has an upper wall 17 that covers the electronic components 16, the lower case 12 has a bottom wall 14 on which the electronic components 16 are arranged, and the upper wall 17 of the upper case 13 is provided with a storage protrusion 19 at a position corresponding to the electronic components 16, which protrudes away from the bottom wall 14 of the lower case 12 and stores the electronic components 16 individually, and the first clamping portion 30 is provided on the storage protrusion 19 of the upper case 13, and the second clamping portion 32 is provided on the bottom wall 14 of the lower case 12.

[0058] Since the electronic components 16 are individually housed in the housing protrusions 19 provided on the upper case 13, the upper case 13 can be made smaller than when the electronic components 16 are collectively covered by the upper case 13. This allows the electrical device 10 to be made smaller as a whole.

[0059] According to this embodiment, the opening 28 is provided in the accommodating protrusion 19 of the upper case 13, and the accommodating protrusion 19 of the upper case 13 has a protrusion 31 at a position near the edge of the hole of the opening 28 that protrudes toward the terminal 16A or the bus bar 26 of the electronic component 16 and abuts against the terminal 16A or the bus bar 26 of the electronic component 16.

[0060] Since the terminals 16A of the electronic component 16 or the bus bars 26 are pressed by the protrusions 31, the relative positional deviation between the terminals 16A of the electronic component 16 and the bus bars 26 is further suppressed.

[0061] According to this embodiment, the upper case 13 has a slit 29 extending along the edge of the opening 28, and a protrusion 31 is provided in the area between the edge of the opening 28 and the edge of the slit 29.

[0062] The region between the edge of the opening 28 of the upper case 13 and the slit 29 is elastically deformed, causing the protrusion 31 to press against the terminal 16A of the electronic component 16 or the bus bar 26. This makes it possible to accommodate the tolerance of the terminal 16A of the electronic component 16 and the tolerance of the bus bar 26, while further suppressing the relative positional deviation between the terminal 16A of the electronic component 16 and the bus bar 26.

[0063] According to this embodiment, the upper case 13 is attached to the lower case 12 along the attachment direction, the normal to the plate surface of the terminal 16A of the electronic component 16 is perpendicular to the attachment direction, the normal to the plate surface of the bus bar 26 is perpendicular to the attachment direction, and the first clamping portion 30 and the second clamping portion 32 are assembled to the terminal 16A of the electronic component 16 and the bus bar 26 from the attachment direction.

[0064] By simply assembling the lower case 12 and the upper case 13 together, the terminals 16A and the bus bars 26 of the electronic components 16 can be clamped by the first clamping portion 30 and the second clamping portion 32.

[0065] <Other embodiments> (1) The opening 28 may be provided in the lower case 12.

[0066] (2) The recess 33 may be omitted.

[0067] (3) The slit 20 formed in the receiving protrusion 19 may be omitted.

[0068] (4) The protrusion 31 may have a shape that is elongated and extends in the vertical direction over the entire length of the first clamping unit 30. Furthermore, a plurality of protrusions 31 may be provided on the first clamping unit 30.

[0069] (5) The terminals 16A of the electronic components 16 may be exposed to the outside. In this case, the first clamping portion 30 may be configured to contact the terminals 16A of the electronic components 16, and the second clamping portion 32 may be configured to contact the connection portions 26A of the bus bars 26.

[0070] (6) The first clamping portion 30 and the second clamping portion 32 may both be provided on the lower case 12, or may both be provided on the upper case 13.

[0071] (7) The shape of the edge of the opening 28 may be any polygonal shape, such as a triangle, a pentagon, or a hexagon, or may be a circle or an oval. [Explanation of symbols]

[0072] 10: Electrical Equipment 11: Case 12: Lower Case 13: Upper Case 14: Bottom wall 15: Containment Wall 16: Electronic Components 16A, 24A: Terminals 17: Upper wall 18: Side wall 19: Storage protrusion 20: Slit 21: Lock protrusion 22: Lock receiving part 23: Relay 24: Fuse 25: Partition wall 26: Busbar 26A: Connection 27: Weld marks 28: Opening 29: Slit 30: First clamping part 31: Protrusion 32: Second clamping part 33: Recess

Claims

1. Case and an electronic component having a terminal; a bus bar welded to the terminal, The terminal and the bus bar overlap each other, the case has an opening, and both or one of the terminals and the bus bars are exposed to the outside of the case through the opening; the case has clamping portions that clamp both the terminals and the bus bars from both sides in a direction in which the terminals and the bus bars are overlapped, the clamping portion includes a first clamping portion that contacts one of the terminal and the bus bar, and a second clamping portion that contacts the other of the terminal and the bus bar, the case includes a lower case to which the electronic components are attached, and an upper case that is attached to the lower case to cover the electronic components, the upper case has the first clamping portion, and the lower case has the second clamping portion.

2. The electrical device according to claim 1 , wherein the electronic components and the bus bars are disposed within the case.

3. The electrical device according to claim 1 or 2, wherein the bus bar is laser welded to the terminal.

4. The electrical device according to claim 1 or 2, wherein the first clamping portion or the second clamping portion has a recess on a surface facing the terminal or the bus bar.

5. the upper case has an upper wall that covers the electronic components, the lower case has a bottom wall on which the electronic components are disposed, the top wall of the upper case is provided with accommodating protrusions at positions corresponding to the electronic components, the accommodating protrusions protruding in a direction away from the bottom wall of the lower case and accommodating the electronic components individually; 3. The electrical device according to claim 1, wherein the first clamping portion is provided on the housing protrusion of the upper case, and the second clamping portion is provided on the bottom wall of the lower case.

6. the opening is provided in the housing protrusion of the upper case, The electrical device according to claim 5 , wherein the accommodating protrusion of the upper case has a protrusion that protrudes toward the terminal or the bus bar and abuts against the terminal or the bus bar at a position near an edge of the opening.

7. the upper case has a slit extending along the hole edge of the opening, The electrical device according to claim 6 , wherein the protrusion is provided in a region between the hole edge of the opening and the hole edge of the slit.

8. The upper case is attached to the lower case along an attachment direction, a normal to the plate surface of the terminal is perpendicular to the mounting direction; a normal to a plate surface of the bus bar is perpendicular to the mounting direction; The electrical device according to claim 1 or 2, wherein the first clamping portion and the second clamping portion are adapted to be attached to the terminal and the bus bar from the attachment direction.

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