WO2019150861A1

WO2019150861A1 - Power conversion device

Info

Publication number: WO2019150861A1
Application number: PCT/JP2018/047802
Authority: WO
Inventors: 勇太大長; 洋海竹ノ谷
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2018-01-30
Filing date: 2018-12-26
Publication date: 2019-08-08
Also published as: JP2019134544A

Abstract

Provided is a power conversion device capable of minimizing increases in the size of a system on which the device is mounted. The power conversion device (1) comprises a metal substrate (10) and a terminal (20) mounted on the metal substrate (10). The terminal (20) comprises a first extending part (22) that extends from the portion of the terminal substrate (10) on which the terminal is mounted in the direction in which the metal substrate (10) extends so as to protrude from the metal substrate (10); and a second extending part (23) that extends in the direction of the metal substrate (10) toward the portion of the metal substrate (10) on which the terminal (20) is mounted from the portion of the first extending part (22) that protrudes from the metal substrate (10) so as to support the first extending part (22).

Description

Power converter

The present disclosure relates to a power conversion device.

Conventionally, a power converter having a metal substrate and a power line connection terminal connected to the power line is known. For example, in Patent Document 1, each of a plurality of power line connection terminals is provided with an attachment portion that is soldered to the upper surface of the metal substrate, and a terminal portion that protrudes upward from the attachment portion and is connected to the power line. The configuration is disclosed.

JP 2007-258626 A

However, in the configuration described in Patent Document 1, since the power line connection terminal protrudes upward from the metal substrate, it is necessary to secure a certain space in a portion above the metal substrate, and the system in which the device is mounted There was a risk of increase in size.

An object of the present disclosure is to provide a power conversion device capable of suppressing an increase in size of a system in which the device is mounted.

The power conversion device according to the present disclosure is:
A metal substrate;
A terminal mounted on the metal substrate;
With
The terminal is
A first extending portion extending from the portion mounted on the metal substrate so as to protrude from the metal substrate in the extending direction of the metal substrate;
The portion extending from the metal substrate of the first extension portion extends toward the metal substrate with respect to the portion of the terminal mounted on the metal substrate so as to support the first extension portion. A second extension,
Have

According to the present disclosure, it is possible to suppress an increase in size of a system in which the device is mounted.

It is a figure showing a power converter concerning an embodiment of this indication. It is an enlarged view of the terminal part in a power converter device. It is a side view of the terminal part in a power converter device. It is a figure which shows the power converter device with which the jig | tool was mounted | worn. It is sectional drawing of the hole part of the jig | tool in FIG. It is a figure which shows the power converter device mounted in the housing | casing. It is sectional drawing of the boss | hub part of the housing | casing in FIG. It is a side view of the terminal part in a power converter device. It is a side view of the terminal part in a power converter device. It is a side view of the terminal part in a power converter device.

Hereinafter, embodiments of the present disclosure will be described in detail based on the drawings. FIG. 1 is a diagram illustrating a power conversion device 1 according to an embodiment of the present disclosure.

In FIG. 1, the lower right side in FIG. 1 is “front”, the upper left side is “rear”, the upper right side is “right”, and the lower left side is “left”. Also, the vertical direction in FIG. In the following description, the extending direction of the metal substrate 10 is defined as a direction along the front-rear direction.

As shown in FIG. 1, the power conversion device 1 is an inverter that converts, for example, power input from a battery mounted on a vehicle or the like into power suitable for an output destination such as a motor. The power conversion device 1 includes a metal substrate 10, a plurality of terminals 20, and a plurality of semiconductor elements (not shown).

The metal substrate 10 is a substrate in which a circuit pattern layer or the like is disposed on a metal layer such as aluminum. An insulating layer that insulates the metal layer from the circuit pattern layer is provided between the metal layer and the circuit pattern layer.

The plurality of terminals 20 are terminals connected to the power line, and are provided on the upper surface 10 A of the metal substrate 10. Two or more terminals 20 are provided at the front end in the longitudinal direction of the metal substrate 10 and three at the rear end.

The two terminals 20 provided at the front end of the metal substrate 10 are terminals for inputting electric power to the circuit pattern of the metal substrate 10. Three terminals 20 provided at the rear end of the metal substrate 10 are terminals for outputting electric power from the circuit pattern of the metal substrate 10.

Since each of the plurality of terminals 20 has the same configuration, only one terminal 20 will be described below, and description of the other terminals 20 will be omitted.

As shown in FIGS. 2 and 3, the terminal 20 is a metal thin plate member, and has a mounted portion 21, a first extending portion 22, and a second extending portion 23.

The attached portion 21 is a portion mounted on the end portion of the upper surface 10 A of the metal substrate 10. Four holes 21A are formed in the attached portion 21. The attached portion 21 is joined to the metal substrate 10 by the solder 30. Specifically, the solder 30 is melted and enters the hole 21 A, and is fixed in that state, whereby the attached portion 21 and the metal substrate 10 are joined.

As a result, the solder 30 that joins the metal substrate 10 and the attached portion 21 is likely to have a fillet shape, so that the connection between the terminal 20 and the circuit pattern of the metal substrate 10 can be improved.

The first extending portion 22 is a portion extending from the attached portion 21 in the extending direction of the upper surface 10A of the metal substrate 10. A portion of the first extending portion 22 protrudes from the metal substrate 10 when the terminal 20 is mounted on the metal substrate 10. The first extending portion 22 is formed with a through hole 22A through which a screw 52 described later can be inserted.

The second extending part 23 extends downward from the end of the first extending part 22 opposite to the attached part 21. In other words, the second extending portion 23 is a metal substrate with respect to the attached portion 21 (the portion mounted on the metal substrate 10 of the terminal 20) from the end portion of the first extending portion 22 on the side protruding from the metal substrate 10. Extend to 10 side.

The second extending portion 23 has two protrusions 23A that protrude further downward (in the extending direction of the second extending portion 23) from both end portions in the width direction. The tip of the protrusion 23 A protrudes downward from the upper surface 10 A of the metal substrate 10. When the jig 40 described later is used, this configuration can prevent the terminal 20 from being inclined with respect to the metal substrate 10 due to its own weight.

More specifically, the vertical length of the protrusion 23A is longer than the vertical length of the metal substrate 10 (the thickness of the metal substrate 10). With such a configuration, the terminal 20 can be easily processed as compared with a configuration in which the second extending portion 23 is extremely short.

Note that the amount of protrusion of the second extending portion 23 downward from the lower surface 10B of the metal substrate 10 can be adjusted as appropriate according to the relationship with the jig 40 and the housing 50 described later. It is preferable to make it as small as possible from the viewpoint.

The second extending portion 23 prevents the terminal 20 from being inclined with respect to the metal substrate 10 in the step of joining the metal substrate 10 and the terminal 20. Hereinafter, the process of joining the metal substrate 10 and the terminal 20 will be described. FIG. 4 is a diagram showing the power conversion device 1 attached to the jig 40. FIG. 5 is a cross-sectional view of the hole 42 portion of the jig 40 in FIG.

As shown in FIG. 4, a jig 40 is used when the metal substrate 10 and the terminal 20 are attached. The jig 40 is formed with an arrangement portion 41 where the metal substrate 10 can be arranged, and a hole 42 into which the projection 23A of the second extension portion 23 enters. The hole 42 is formed at a position corresponding to the position of the protrusion 23 A of the second extension portion 23 when the terminal 20 is disposed on the metal substrate 10 disposed on the placement portion 41 in the jig 40.

The cream solder is printed on the portion of the metal substrate 10 disposed on the jig 40 where the terminals 20 are disposed.

First, the metal substrate 10 is arranged on the arrangement portion 41 of the jig 40, and the terminals 20 are arranged at desired positions on the metal substrate 10. At this time, the terminals 20 are arranged such that most of the terminals 20 except the portion mounted on the upper surface 10 A of the metal substrate 10 protrude from the metal substrate 10 in order to secure the mounting area of the circuit components on the metal substrate 10. Therefore, the center of gravity G of the terminal 20 is located at a portion of the first extending portion 22 that protrudes from the metal substrate 10. Therefore, when the terminal 20 is mounted on the metal substrate 10, the terminal 20 is easily inclined with respect to the metal substrate 10 due to its own weight.

In the present embodiment, when the terminal 20 is disposed on the metal substrate 10, the first extension portion 22 is supported by the second extension portion 23, and the terminal 20 is prevented from being inclined with respect to the metal substrate 10. The

Specifically, as shown in FIG. 5, when the terminal 20 is arranged on the jig 40, when the protrusion 23 A is inserted into the hole 42, the recess 23 B between the two protrusions 23 A is formed between the two holes 42. Is supported by a portion 43 of That is, since the end of the first extension 22 opposite to the attached part 21 is supported by the second extension 23, the terminal 20 can be prevented from being inclined with respect to the metal substrate 10.

The metal substrate 10 and the terminal 20 thus arranged on the jig 40 are soldered by a reflow process or the like. At this time, since the terminal 20 is prevented from being inclined with respect to the metal substrate 10, the terminal 20 can be stably disposed on the metal substrate 10, and as a result, the metal substrate 10 and the terminal 20 are firmly bonded. be able to.

Further, since the two protrusions 23 A enter the two holes 42, for example, even if the terminal 20 is subjected to a force to rotate with respect to the jig 40, the two protrusions 23 A are located between the two holes 42. Contact with the portion 43 of the terminal 20 restricts the rotation of the terminal 20. Thereby, before the terminal 20 is joined to the metal substrate 10, the terminal 20 is prevented from being detached from the metal substrate 10, and as a result, the metal substrate 10 and the terminal 20 can be stably joined.

Further, the presence of the second extending portion 23 (two protrusions 23A) makes it possible to accurately position the terminal 20 with respect to the metal substrate 10.

Moreover, the 2nd extension part 23 can position the power converter device 1 correctly also in the process of assembling the power converter device 1 to the housing | casing 50 besides the process of joining the metal substrate 10 and the terminal 20. FIG. Works. Hereinafter, the process of assembling the power converter 1 to the housing 50 will be described. FIG. 6 is a diagram illustrating the power conversion device 1 mounted on the housing 50. 7 is a cross-sectional view of the boss 51 portion of the housing 50 in FIG. The direction in FIG. 6 is the same as the direction in FIG.

As shown in FIGS. 6 and 7, the casing 50 is provided with a boss 51 for screwing the power conversion device 1 so as to protrude upward from the mounting surface 50A of the metal substrate 10. The position of the upper end of the boss 51 is a position corresponding to the first extending portion 22 of the terminal 20 when the metal substrate 10 is disposed on the mounting surface 50 A of the housing 50.

The first extending portion 22 of the terminal 20 has a through hole 22A as described above. The power converter 1 is fixed to the housing 50 by inserting a screw 52 into the through hole 22 A and screwing the screw 52 to the boss 51. In addition, a power input / output terminal 60 that inputs / outputs power to / from the power converter 1 is disposed on the terminal 20 and is fastened together with the terminal 20 by a screw 52. Thereby, the terminal 20 and the power input / output terminal 60 are easily in contact with each other.

Since the 2nd extension part 23 protrudes below from the edge part on the opposite side to the to-be-attached part 21 in the 1st extension part 22, for example, after the power converter device 1 is arrange | positioned in the housing | casing 50, FIG. 7, the second extending part 23 collides with the boss 51. Thereby, since the movement to the left direction of the power converter device 1 is controlled, it becomes easy to perform positioning in the housing | casing 50 of the power converter device 1. FIG.

In addition, the length of the first extension 22 is determined by the positional relationship with the boss 51 of the housing 50. However, if the first extension 22 is formed to be relatively long, external vibrations and terminals Due to the heat generated by the current input to and output from the terminal 20, the terminal 20 may be detached from the metal substrate 10.

Therefore, it is desirable to make the length of the first extension portion 22 as short as possible. For example, the length of the first extension portion 22 is a length capable of forming the through hole 22A through which the screw 52 is inserted. By doing in this way, since the length of the 1st extension part 22 can be made into the minimum required length, it originates in the heat which generate | occur | produces by external vibration and the electric current input / output to the terminal 20. The terminal 20 can be prevented from being detached from the metal substrate 10.

Also, the thickness of the terminal 20 is desirably as thin as possible from the viewpoint of cost reduction. For example, the thickness of the terminal 20 is a minimum value among the terminals 20 having a current capacity that allows an amount of current input / output at the power input / output terminal 60. By doing in this way, cost can be reduced, operating the power converter device 1 normally.

According to the present embodiment configured as described above, the first extending portion 22 connected to the power input / output terminal 60 of the terminal 20 is located at a position protruding in the horizontal direction from the metal substrate 10. That is, since the 1st extension part 22 does not protrude in the perpendicular direction from metal substrate 10, when mounting power converter 1 in case 50, the space above power converter 1 can be used effectively. it can. That is, it is possible to suppress an increase in size of a system in which the power conversion device 1 is mounted.

Moreover, since the terminal 20 has the 2nd extension part 23 which protrudes below from the 1st extension part 22, in the process of joining the metal substrate 10 and the terminal 20, the 1st of the terminal 20 arrange | positioned at the metal board | substrate 10 is carried out. A portion of the first extending portion 22 that protrudes from the metal substrate 10 can be supported by the second extending portion 23. Therefore, it is possible to prevent the terminal 20 from being inclined with respect to the metal substrate 10.

By the way, when the power converter 1 is disposed on a plane in a state where the terminal 20 of the power converter 1 is mounted on the metal substrate 10 (see FIG. 1 and the like), for example, with respect to the first extending portion 22. External force may be applied downward. At this time, in the case of the configuration not having the second extending portion 23, the first extending portion 22 may be bent and deformed due to an external force, or the terminal 20 may be detached from the metal substrate 10 in some cases.

However, in the present embodiment, since the second extending portion 23 protrudes downward from the first extending portion 22 so as to support the first extending portion 22, an external force is applied to the first extending portion 22. Even so, the first extension 22 can be supported by the second extension 23. As a result, it is possible to suppress the terminal 20 from being bent and deformed due to an external force or from being detached from the metal substrate 10.

Further, in the process of assembling the power conversion device 1 to the housing 50, for example, when the power conversion device 1 is disposed on the housing 50 and then displaced to the left in FIG. Collides with boss 51. Thereby, since the movement to the left direction of the power converter device 1 is controlled, it becomes easy to perform positioning in the housing | casing 50 of the power converter device 1. FIG.

Incidentally, in the metal substrate 10, the metal layer and the circuit pattern layer are insulated from each other by the insulating layer. However, when the terminal 20 is fixed to the housing 50 together with the metal substrate 10 by screws, There is a possibility that insulation from the circuit pattern layer is not ensured.

However, in the present embodiment, the terminal 20 is joined to the metal substrate 10 by the solder 30 and is fixed to the housing 50 by the screw 52 at the portion of the first extending portion 22. Therefore, insulation between the metal layer and the circuit pattern layer in the metal substrate 10 can be ensured.

In the above embodiment, the position of the tip of the second extending portion 23 is a position protruding downward from the lower surface 10B of the metal substrate 10, but the present disclosure is not limited to this, for example, As shown in FIG. 8, the position of the tip of the second extension 23 may be the same position as the position of the lower surface 10 B of the metal substrate 10.

Further, as shown in FIG. 9, in relation to the jig 40 and the like, unless the terminal 20 is inclined with respect to the metal substrate 10, the distal end portion of the second extension portion 23 protrudes downward from the lower surface 10 B. It is not necessary.

Moreover, in the said embodiment, although the 2nd extension part 23 extended below from the front-end | tip of the 1st extension part 22, this indication is not limited to this, For example, as shown in FIG. The first extending portion 22 may extend downward from a position that is not the tip portion.

In the above-described embodiment, five terminals 20 are provided. However, the present disclosure is not limited to this, and it is only necessary to provide as many terminals 20 as the number according to the application of the power conversion device 1.

Further, in the above-described embodiment, the two protrusions 23A are provided in the second extension part 23. However, the present disclosure is not limited to this, and three or more protrusions 23A are provided in the second extension part 23. It may be done. Further, in the case where the rotation of the terminal 20 with respect to the jig 40 is not considered, only one protrusion 23A may be provided on the second extending portion 23, or the protrusion 23A is not provided. May be.

In addition, each of the above-described embodiments is merely an example of implementation in carrying out the present disclosure, and the technical scope of the present disclosure should not be interpreted in a limited manner. That is, the present disclosure can be implemented in various forms without departing from the gist or the main features thereof.

The disclosure of the specification, drawings and abstract contained in the Japanese application of Japanese Patent Application No. 2018-013526 filed on Jan. 30, 2018 is incorporated herein by reference.

The power conversion device of the present disclosure is useful as a power conversion device that can suppress an increase in the size of a system in which the device is mounted.

DESCRIPTION OF SYMBOLS 1 Power converter 10 Metal substrate

10A Upper surface

10B Lower surface 20 Terminal 21 Attached part 21A Hole 22 1st extension part 22A Through-hole 23 2nd extension part 23A Protrusion 23B Recess 30 Solder 40 Jig 41 Arrangement part 42 Hole 50 Housing Body 50A Mounting surface 51 Boss 52 Screw 60 Power input / output terminal

Claims

A metal substrate;
A terminal mounted on the metal substrate;
With
The terminal is
A first extending portion extending from the portion mounted on the metal substrate so as to protrude from the metal substrate in the extending direction of the metal substrate;
The portion extending from the metal substrate of the first extension portion extends toward the metal substrate with respect to the portion of the terminal mounted on the metal substrate so as to support the first extension portion. A second extension,
Having
Power conversion device.
The center of gravity of the terminal is located at a portion of the first extension portion that protrudes from the metal substrate.
The power conversion device according to claim 1.
The second extending portion has two or more protrusions protruding in the extending direction of the second extending portion.
The power conversion device according to claim 1.
A portion of the first extension portion that protrudes from the metal substrate is formed with a through-hole through which a screw for fixing the terminal to the housing can be inserted.
The power conversion device according to claim 1.
The tip of the second extension part protrudes in the extending direction of the second extension part from the mounting surface of the terminal in the metal substrate.
The power conversion device according to claim 1.
The tip end of the second extension part protrudes in the extending direction of the second extension part from the surface of the metal substrate opposite to the terminal mounting surface.
The power conversion device according to claim 1.
The thickness of the terminal is the minimum thickness among the current capacity of the terminal that can tolerate the amount of current input to and output from the terminal.
The power conversion device according to claim 1.