WO2023240759A1 - Intelligent power module and electrical device - Google Patents

Abstract

Disclosed in the present application are an intelligent power module and an electrical device. The intelligent power module comprises: a first circuit board; at least one electrical connector, which is mounted on the first circuit board; a second circuit board, which passes through the electrical connector and is arranged spaced apart from the first circuit board, wherein the face of the first circuit board that faces the second circuit board is provided with a power chip; and an explosion-proof member, which avoids the electrical connector and is arranged between the first circuit board and the second circuit board.

Description

Intelligent power modules and electrical equipment

This application claims priority to the Chinese patent application with application number 202210683517.X filed on June 16, 2022, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of electrical equipment, and in particular to an intelligent power module and electrical equipment.

Background technique

Among related technologies, intelligent power integrated module (IPM, Intelligent Power Module) is a power switching device with the advantages of small size, high power density and low cost.

The existing IPM includes: power circuit substrate, built-in functional circuit board and packaging shell; the built-in functional circuit board is directly welded to the terminals protruding from the power circuit substrate, and then the packaging shell cover is placed on the built-in functional circuit board. The power circuit substrate seals the bottom opening of the packaging case, and finally the glue is poured and solidified to form a stacked packaging structure. During use, due to control strategies or interference, the power chips on the power circuit substrate in the IPM are at risk of exploding.

Currently, existing IPMs do not have explosion-proof functions. When the power chip on the power circuit substrate explodes, the explosion impact will destroy the insulation isolation system on the surface of the built-in functional circuit board, threatening the user's personal safety.

technical problem

The main purpose of this application is to provide an intelligent power module and electrical equipment, aiming to solve the problem that the existing IPM does not have the explosion-proof function. When the power chip on the power circuit substrate explodes, the explosion impact will destroy the surface of the built-in functional circuit board. The insulation and isolation system threatens the personal safety of users.

Technical solutions

In order to achieve the above purpose, this application proposes an intelligent power module, including:

first circuit board;

At least one electrical connector, the electrical connector is mounted on the first circuit board;

a second circuit board, the second circuit board passes through the electrical connector and is spaced apart from the first circuit board; a power chip is provided on a side of the first circuit board facing the second circuit board ;as well as,

An explosion-proof component avoids the electrical connector and is arranged between the first circuit board and the second circuit board.

In one embodiment, a plurality of power chips is provided on a side of the first circuit board facing the second circuit board, and the plurality of power chips constitute at least one power circuit;

The second circuit board is provided with a primary-side functional circuit electrically connected to at least one of the power circuits through the electrical connector and a secondary-side functional circuit connected to the primary-side functional circuit through an isolation element.

In one embodiment, the orthographic projection area of the explosion-proof component on the second circuit board at least covers the secondary side functional circuit area.

In one embodiment, the explosion-proof parts are plastic parts, bare PCB boards or NOMEX insulating paper.

In one embodiment, when the explosion-proof parts are made of plastic parts, the explosion-proof parts include:

A board body is provided with a first support member on one side facing the second circuit board, and the first support member is in contact with the second circuit board.

In one embodiment, the first support member includes:

A plurality of supporting ribs are arranged at intervals along the circumference of the board body, and the top ends of the plurality of supporting ribs are in contact with the second circuit board; and/or,

There is at least one first support column, one end of the first support column is provided on a side of the board body facing the second circuit board, and the other end of the first support column is in contact with the second circuit board.

In one embodiment, when the first support member includes a plurality of support ribs arranged at intervals along the circumference of the plate body, the first support member further includes a plurality of support ribs arranged along the circumferential direction of the plate body. Reinforcing ribs, the bottom ends of a plurality of supporting ribs are arranged on the reinforcing ribs at intervals.

In one embodiment, the second circuit board is provided with positioning holes, and the board body is provided with positioning posts that cooperate with the positioning holes.

In one embodiment, the board body is provided with guide holes to avoid the electrical connectors, and the electrical connectors include:

Welding seat, the bottom end of the welding seat is welded on the first circuit board;

Electrical connection terminal, the bottom end of the electrical connection terminal is arranged in the welding hole of the soldering base, and the other end of the electrical connection terminal passes through the corresponding guide hole on the board body and is inserted into the second circuit plate;

The side of the board body facing the first circuit board abuts or is fixed on the welding base.

In one embodiment, a support portion is formed along the outer periphery of the guide hole on a side of the board facing the first circuit board;

One end of the support portion away from the plate body is in contact with the upper surface of the welding seat; or,

One end of the support portion away from the plate body is interference-fitted with the welding seat.

In one embodiment, a second support member is provided on a side of the board body facing the first circuit board, and the second support member is in contact with the upper surface of the first circuit board.

In one embodiment, the second support member includes at least one second support column, one end of the second support column is disposed on a side of the board body facing the first circuit board, and the second support column The other end is in contact with the first circuit board.

In one embodiment, the intelligent power module further includes:

A shell with an opening at the bottom. The first circuit board blocks the bottom opening of the shell and defines an accommodation space with the shell. The second circuit board and the explosion-proof component are located on the In the accommodation space; a number of second through holes are provided on the top plate of the housing, and the top ends of some of the electrical connectors extend out of the housing through the second through holes;

The housing, the second circuit board and the explosion-proof component are all provided with potting holes for potting insulating medium, and the gaps in the accommodation space are filled with insulating medium.

In one embodiment, there is a gap between the outer periphery of the explosion-proof component and the inner wall of the housing.

In one embodiment, when the explosion-proof component adopts a bare PCB board, the bare PCB board is provided with welding holes for passing through the electrical connector;

At least one of the electrical connectors on the first circuit board passes through the corresponding welding hole on the bare PCB board and is welded to the welding hole to fix the bare PCB board to the first circuit board. and the second circuit board.

In one embodiment, when the explosion-proof part uses NOMEX insulating paper, an adhesive part is provided on the electrical connector, and the electrical connector passes through the NOMEX insulating paper and connects to the electrical connector through the adhesive part. The NOMEX insulation paper is bonded.

In a second aspect, this application also provides an electrical device, including the intelligent power module described in any one of the above.

beneficial effects

The technical solution of this application is to add an explosion-proof component between the first circuit board and the second circuit board. When the power chip explodes, the explosion shock wave can be isolated on one side of the explosion-proof component to prevent the explosion shock wave from damaging the other side of the explosion-proof component. The insulation isolation system improves the safety of the intelligent power module.

Description of the drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is an exploded view of an embodiment of the intelligent power module of the present application;

Figure 2 is a front view of another embodiment of the smart power module of the present application;

Figure 3 is a front view of the explosion-proof parts of the intelligent power module of this application;

Figure 4 is a schematic structural diagram of the explosion-proof parts of the intelligent power module of this application.

Explanation of reference numbers:

label	name	label	name
10	first circuit board	twenty four	first support column
20	Explosion-proof parts	25	escape hole
30	Second circuit board	26, 33, 41	Glue filling hole
40	case	27	second support column
11	Electrical connectors	28	Support part
111	Welding seat	29	Positioning post
112	Electrical connection terminal	31	Positioning hole
twenty one	plate body	32	first through hole
twenty two	Reinforcement ribs	50	insulating medium
twenty three	Support side	42	second through hole

The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

Embodiments of the invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relationship between components in a specific posture (as shown in the drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In this application, unless otherwise clearly stated and limited, the terms "connection", "fixing", etc. should be understood in a broad sense. For example, "fixing" can be a fixed connection, a detachable connection, or an integral body; it can It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In addition, if there are descriptions involving “first”, “second”, etc. in the embodiments of this application, the descriptions of “first”, “second”, etc. are only for descriptive purposes and shall not be understood as indications or implications. Its relative importance or implicit indication of the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the meaning of "and/or" appearing in the entire text includes three parallel solutions. Taking "A and/or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the scope of protection required by this application.

In view of the problem that the existing IPM does not have an explosion-proof function. When the power chip on the power circuit substrate explodes, the explosion impact will destroy the insulation isolation system on the surface of the built-in functional circuit board, threatening the user's personal safety. This application provides a The intelligent power module, by adding an explosion-proof component 20 between the first circuit board 10 and the second circuit board 30, can isolate the explosion shock wave on one side of the explosion-proof component 20 when the power chip explodes, preventing the explosion shock wave from damaging the explosion-proof component. The insulation isolation system on the surface of the second circuit board 30 on the other side of the component 20 improves the safety of the IPM.

The concept of the present application will be further elaborated below in conjunction with some specific embodiments.

As shown in Figure 1, an embodiment of the present application provides an intelligent power module including:

first circuit board 10;

At least one electrical connector 11, the electrical connector 11 is installed on the first circuit board 10;

The second circuit board 30 is passed through the electrical connector 11 and is spaced apart from the first circuit board 10 ; the first circuit board 10 faces the second circuit board 30 A power chip is provided on one side; and,

The explosion-proof component 20 avoids the electrical connector 11 and is disposed between the first circuit board 10 and the second circuit board 30 .

The first circuit board 10 includes, but is not limited to, an aluminum-based resin copper-clad laminate, a copper-based resin copper-clad laminate, or a double-sided copper-clad ceramic substrate, and one side of the first circuit board 10 facing the second circuit board 30 is provided with Multiple power chips constitute at least one power circuit. For example, multiple power chips constitute power circuit units including but not limited to inverters, rectifiers, etc.

The second circuit board 30 is provided with a plurality of first through holes 32. The electrical connector 11 passes through the first through holes 32 and is welded or crimped at the first through holes 32. In this way, electrical connection and mechanical connection are achieved with the second circuit board 30 . The second circuit board 30 is provided with a primary-side functional circuit electrically connected to the power circuit on the first circuit board 10 through the electrical connector 11 and a primary-side functional circuit electrically connected to the primary-side functional circuit through an isolation element. Secondary side functional circuit. The orthographic projection area of the explosion-proof component 20 on the second circuit board 30 at least covers the secondary side functional circuit area. The primary side functional circuit includes but is not limited to an inverter drive circuit and/or a rectifier drive circuit; the secondary side functional circuit includes but is not limited to a signal sampling circuit, an overcurrent/overvoltage protection circuit, etc.

The smart power module also includes: a housing 40 with an opening at the bottom. The first circuit board 10 blocks the bottom opening of the housing 40 and defines an accommodation space with the housing 40. The second circuit board 10 blocks the bottom opening of the housing 40 and defines an accommodation space with the housing 40. The plate 30 and the explosion-proof component 20 are both located in the accommodation space; a number of second through holes 42 are provided on the top plate of the housing 40, and the top ends of some of the electrical connectors 11 pass through the second through holes 42. A hole 42 extends out of the housing 40 .

The explosion-proof component 20 is provided with an escape portion for avoiding the electrical connector 11 . As shown in FIG. 1 , in one embodiment, the escape portion is at least one escape hole 25 provided corresponding to at least one electrical connector 11 . Of course, in other implementation examples, when the electrical connector 11 is only located on the side close to the periphery of the first circuit board 10 , the avoidance portion may also be a recessed portion provided around the explosion-proof component 20 to avoid the connector. In one embodiment, the explosion-proof component 20 includes but is not limited to plastic components, bare PCB boards, or NOMEX insulation paper.

In one embodiment, the housing 40 , the second circuit board 30 and the explosion-proof component 20 are all provided with potting holes 26 , 33 and 41 for potting the insulating medium 50 . The gap is filled with insulating medium 50 . In this embodiment, between the first circuit board 10 and the explosion-proof component 20 , between the explosion-proof component 20 and the second circuit board 30 , and between the second circuit board 30 and the housing 40 The gaps between the top plates are filled with insulating medium 50 . Wherein, the insulating medium 50 includes but is not limited to silicone gel. The insulating medium can enhance the effect of insulation isolation. In one embodiment, there is a gap between the outer periphery of the explosion-proof component 20 and the inner wall of the housing 40 . On the one hand, this facilitates glue filling, and on the other hand, it facilitates the smooth discharge of air bubbles generated during glue filling, thereby improving the potting effect. In this embodiment, the explosion-proof component 20 can isolate the explosion shock wave on one side of the explosion-proof component 20 when the power chip on the first circuit board 10 explodes to prevent the explosion-proof component 20 from damaging the surface of the second circuit board. The insulation glue adhesion effect improves the safety of the intelligent function module.

Of course, in other implementation examples, when the area of the second circuit board 30 is large enough to meet the requirements of the creepage distance and electrical clearance between the components on the second circuit board 30, the The insulating medium 50 does not need to be filled between the explosion-proof component 20 and the second circuit board 30. In this case, the explosion-proof component 20 can isolate the explosion shock wave on one side of the explosion-proof component 20 to prevent the carbide generated by the explosion from covering the second circuit board. The surface of the second circuit board 30 destroys the insulation isolation system on the surface of the second circuit board 30, thereby improving the safety of the intelligent power module.

The installation method of the explosion-proof component 20 in the intelligent power module includes but is not limited to: by arranging a support structure on the explosion-proof component 20 or on the first circuit board 10 and the second circuit board 30 so that the explosion-proof component 20 can be installed in the intelligent power module. The explosion-proof component 20 is abutted between the first circuit board 10 and the second circuit board 30 ; or, by connecting between the explosion-proof component 20 or the first circuit board 10 and the second circuit board 30 A fixing piece is provided on the casing 40 so that the explosion-proof piece 20 is fixed on the first circuit board 10 or the second circuit board 30; or, the explosion-proof piece 20 can also be fixed on the housing 40, even when When the housing 40 is a split housing 40 , that is, when the frame of the housing 40 and the top plate of the housing 40 have a separate structure, the explosion-proof component 20 can also be designed to be integrated with the housing 40 . 40 in one piece.

In one embodiment, when the explosion-proof component 20 adopts a PCB bare board, the PCB bare board is provided with welding holes for passing through the electrical connectors; at least one of the first circuit boards 10 The electrical connector 11 passes through the corresponding welding hole on the PCB bare board and is welded with the welding hole to fix the PCB bare board between the first circuit board 10 and the second circuit board 30 .

In one embodiment, when the explosion-proof component 20 uses NOMEX insulating paper, the electrical connector 11 is provided with an adhesive portion, and the electrical connector 11 passes through the NOMEX insulating paper and passes through the adhesive. The part is bonded with the NOMEX insulation paper.

In one embodiment, in a preferred implementation example, the explosion-proof parts are made of plastic parts, and the specific method is as shown in Figure 2:

When the explosion-proof part 20 is made of plastic parts, the explosion-proof part 20 includes:

The plate body 21 is provided with a first support member on a side facing the second circuit board 30 , and the first support member is in contact with the second circuit board 30 .

In one embodiment, the first support member includes:

A plurality of support ribs 23 are provided at intervals along the circumferential direction of the board body 21, and the top ends of the plurality of support ribs 23 are in contact with the second circuit board 30; and/or,

At least one first support column 24 , one end of the first support column 24 is disposed on a side of the board body 21 facing the second circuit board 30 , and the other end of the first support column 24 is in contact with the second circuit board 30 . The second circuit board 30.

In this embodiment, the height of the support rib 23 is the same as the height of the first support column 24, so that the second circuit board 30 can be supported together with the first support column 24, so that the second circuit board 30 and the board body 21 There is a certain gap therebetween to fill the insulating medium 50 therebetween. In addition, since the upper surface of the support rib 23 and the first support column 24 is in contact with the lower surface of the second circuit board 30 , when the power chip on the first circuit board 10 explodes, the support rib 23 can be in contact with the second circuit board 30 . A support column 24 evenly distributes and conducts the impact force of the explosion to the second circuit board 30 to prevent the board body 21 from deforming. At the same time, a plurality of the support ribs 23 are arranged at intervals, so that there is a certain gap between adjacent support ribs 23, which facilitates glue filling and facilitates the smooth discharge of air bubbles generated by glue filling during vacuuming after glue filling.

In one embodiment, when the first support member includes a plurality of support ribs 23 spaced apart along the circumference of the plate body 21 , the first support member also includes a plurality of support ribs 23 arranged along the circumference of the plate body 21 . The bottom ends of a plurality of supporting ribs 23 are arranged on the reinforcing ribs 22 at intervals.

In this embodiment, reinforcing ribs are provided under the supporting ribs, which can improve the strength of the explosion-proof parts and prevent them from deforming. It should be noted that when the reinforcing rib 22 is not provided under the support rib 23 , the height of the support rib 23 is the same as the height of the first support column, and both are in contact with the second circuit board 30 ; When the reinforcement rib 22 is provided under the support rib 23, the height of the first support column 24 is equal to the sum of the heights of the reinforcement rib 22 and the support rib 23. The sum of the first support column 24 and The plurality of support ribs 23 are all in contact with the second circuit board 30 .

In one embodiment, the second circuit board 30 is provided with positioning holes 31 , and the board body 21 is provided with positioning posts 29 that cooperate with the positioning holes 31 .

In this embodiment, positioning posts 29 are formed on the upper surface of the board body 21 , and there are at least two positioning posts 29 . For example, the two positioning posts 29 are respectively provided at the upper left corner and the lower right corner of the board body 21 . It can be understood that the number of positioning posts 29 can also be set at three or more, which is not limited in this embodiment. And the positioning post 29 penetrates the second circuit board 30, thereby realizing the positioning of the second circuit board 30 on the horizontal plane where the board body 21 is located, so that the orthographic projection of the board body 21 on the second circuit board 30 at least covers all the areas. The second circuit board 30 occupies the area occupied by the secondary side circuit.

In one embodiment, the electrical connector 11 includes:

Welding seat 111, the bottom end of the welding seat 111 is welded on the first circuit board 10;

Electrical connection terminal 112, the bottom end of the electrical connection terminal 112 is located in the welding hole of the soldering base 111, and the other end of the electrical connection terminal 112 passes through the corresponding guide hole on the board body and is then inserted into the welding hole. The second circuit board 30;

The side of the board 21 facing the first circuit board 10 is in contact with or fixed on the soldering seat 111 .

In this embodiment, the solder seat 111 is located between the first circuit board 10 and the board body 21 , and the side of the board body 21 facing the first circuit board 10 abuts or is fixed on the solder joint. On the base 111, since the soldering base has a certain height, there is a certain distance between the board body 21 and the first circuit board 10, so that the insulating medium 50 can completely cover the first circuit board 10 during glue filling. Bonding wires and other devices on the.

In one embodiment, a support portion 28 is formed along the outer circumference of the guide hole on a side of the board body 21 facing the first circuit board 10; an end of the support portion 28 away from the board body is connected to the welding hole. The upper surface of the seat 11 is in contact; or, the end of the support portion 28 away from the plate body is in interference fit with the welding seat 11 .

In an embodiment, when the height of the soldering seat 111 is low, the side of the board body 21 facing the first circuit board 10 may also be provided with a supporting part 28, and the supporting part 28 is provided corresponding to the soldering seat 111. This is to increase the distance between the board body 21 and the first circuit board 10 to ensure that the insulating glue can completely cover the binding wires and other devices on the first circuit board 10 during glue filling. The height of the support portion 28 can be set according to actual requirements.

In one embodiment, the support part may be an annular protrusion, and the inner diameter and outer diameter of the end of the support part are equal to the inner diameter and outer diameter of the upper surface of the welding base respectively, so as to abut with the upper surface of the welding base. ; Alternatively, the support part is a cylindrical structure with a mounting hole, and the mounting hole is an interference fit with the welding seat.

In one embodiment, a second support member is provided on a side of the board body 21 facing the first circuit board 10 , and the second support member is in contact with the upper surface of the first circuit board 10 .

In this embodiment, when the board body 21 and the second circuit board 30 are pressed down and installed on the first circuit board 10, the second support member can abut against the first circuit board 10, thereby avoiding The board body 21 is deformed during the press-down installation process to prevent the deformation of the board body 21 from causing the board body 21 to squeeze the binding wires and other components on the first circuit board 10 during the press-down installation process. In one embodiment, the second support member includes at least one second support column 27. One end of the second support column 27 is disposed on a side of the board body 21 facing the first circuit board 10. The other end of the second support column 27 is in contact with the first circuit board 10 .

It can be seen from the above that by adding an explosion-proof component 20 between the first circuit board 10 and the second circuit board 30 in the smart power module provided by the embodiment of the present application, when the power chip explodes, the explosion shock wave can be isolated by the explosion-proof component. 20 to prevent the explosion shock wave from damaging the insulation isolation system on the other side of the explosion-proof part 20, thereby improving the safety of the IPM.

In a second aspect, this application also provides an electrical device, including the above intelligent power module. The specific structure of the smart power module refers to the above-mentioned embodiments. Since this electrical equipment adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be detailed here. Repeat.

The above are only optional embodiments of the present application, and do not limit the patent scope of the present application. Under the application concept of the present application, equivalent structural transformations made using the contents of the description and drawings of the present application, or direct/indirect Application in other related technical fields is included in the scope of patent protection of this application.

Claims (17)

1. An intelligent power module, including:

   first circuit board;

   At least one electrical connector, the electrical connector is mounted on the first circuit board;

   a second circuit board, the second circuit board passes through the electrical connector and is spaced apart from the first circuit board; a power chip is provided on a side of the first circuit board facing the second circuit board ;as well as,

   An explosion-proof component avoids the electrical connector and is arranged between the first circuit board and the second circuit board.
2. The intelligent power module according to claim 1, wherein the first circuit board is provided with a plurality of power chips on a side facing the second circuit board, and the plurality of power chips constitute at least one power circuit;

   The second circuit board is provided with a primary-side functional circuit electrically connected to at least one of the power circuits through the electrical connector and a secondary-side functional circuit connected to the primary-side functional circuit through an isolation element.
3. The intelligent power module according to claim 2, wherein the orthographic projection area of the explosion-proof component on the second circuit board at least covers the secondary side functional circuit area.
4. The intelligent power module according to claim 1, wherein the explosion-proof parts are plastic parts, PCB bare boards or NOMEX insulating paper.
5. The intelligent power module according to claim 1, wherein when the explosion-proof parts are made of plastic parts, the explosion-proof parts include:

   A board body is provided with a first support member on one side facing the second circuit board, and the first support member is in contact with the second circuit board.
6. The intelligent power module according to claim 5, wherein the first support member includes:

   A plurality of supporting ribs are arranged at intervals along the circumference of the board body, and the top ends of the plurality of supporting ribs are in contact with the second circuit board; and/or,

   There is at least one first support column, one end of the first support column is provided on a side of the board body facing the second circuit board, and the other end of the first support column is in contact with the second circuit board.
7. The intelligent power module according to claim 6, when the first support member includes a plurality of support ribs arranged circumferentially along the plate body, the first support member further includes a plurality of support ribs arranged along the circumferential direction of the plate body. Reinforcing ribs are provided in the circumferential direction of the body, and the bottom ends of a plurality of supporting ribs are arranged on the reinforcing ribs at intervals.
8. The intelligent power module according to claim 5, wherein the second circuit board is provided with positioning holes, and the board body is provided with positioning posts that cooperate with the positioning holes.
9. The intelligent power module according to claim 5, wherein the plate body is provided with guide holes to avoid the electrical connectors, and the electrical connectors include:

   Welding seat, the bottom end of the welding seat is welded on the first circuit board;

   Electrical connection terminal, the bottom end of the electrical connection terminal is located in the welding hole of the soldering base, and the other end of the electrical connection terminal is passed through the corresponding guide hole on the board body and then penetrated into the second circuit plate;

   The side of the board body facing the first circuit board abuts or is fixed on the welding base.
10. The intelligent power module according to claim 9, wherein a support portion is formed along the outer periphery of the guide hole on a side of the board facing the first circuit board;

    One end of the support portion away from the plate body is in contact with the upper surface of the welding seat; or,

    One end of the support portion away from the plate body is interference-fitted with the welding seat.
11. The intelligent power module according to claim 5, wherein a second support member is provided on a side of the board body facing the first circuit board, and the second support member is in contact with the upper surface of the first circuit board. catch.
12. The intelligent power module according to claim 11, wherein the second support member includes at least one second support column, one end of the second support column is disposed on a side of the board body facing the first circuit board. , the other end of the second support column is in contact with the first circuit board.
13. The intelligent power module according to claim 1, further comprising:

    A shell with an opening at the bottom. The first circuit board blocks the bottom opening of the shell and defines an accommodation space with the shell. The second circuit board and the explosion-proof component are located on the In the accommodation space; a number of second through holes are provided on the top plate of the housing, and the top ends of some of the electrical connectors extend out of the housing through the second through holes;

    The top plate of the housing, the second circuit board and the explosion-proof component are all provided with potting holes for potting insulating medium, and the gaps in the accommodation space are filled with insulating medium.
14. The intelligent power module according to claim 13, wherein there is a gap between the outer periphery of the explosion-proof member and the inner wall of the housing.
15. The intelligent power module according to claim 4, wherein when the explosion-proof component adopts a PCB bare board, the PCB bare board is provided with welding holes for passing through the electrical connector;

    At least one of the electrical connectors on the first circuit board passes through the corresponding welding hole on the bare PCB board and is welded to the welding hole to fix the bare PCB board to the first circuit board. and the second circuit board.
16. The intelligent power module according to claim 4, wherein when the explosion-proof part adopts NOMEX insulating paper, the electrical connector is provided with an adhesive part, and the electrical connector passes through the NOMEX insulating paper and passes through The bonding part is bonded to the NOMEX insulation paper.
17. An electrical device, including the intelligent power module according to any one of claims 1 to 16.