CN218996694U - Plastic shell of power module and power module - Google Patents
Plastic shell of power module and power module Download PDFInfo
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- CN218996694U CN218996694U CN202223301587.9U CN202223301587U CN218996694U CN 218996694 U CN218996694 U CN 218996694U CN 202223301587 U CN202223301587 U CN 202223301587U CN 218996694 U CN218996694 U CN 218996694U
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- mounting surface
- power module
- ceramic substrate
- mounting
- metallized ceramic
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Abstract
The utility model relates to the technical field of power modules, in particular to a plastic shell of a power module and the power module, wherein the plastic shell comprises a shell, wherein the shell is provided with a first mounting surface and second mounting surfaces arranged on two sides of the first mounting surface; the plurality of rectangular grooves are arranged on the first mounting surface; the mounting hole is arranged on the second mounting surface, and the inner side wall of the mounting hole is provided with a plurality of thread guiding dents with a certain thickness.
Description
Technical Field
The utility model relates to the technical field of power modules, in particular to a plastic shell of a power module and the power module.
Background
The power module has the advantages of high integration, high reliability, energy conservation, environmental protection and the like, so that the power module is widely applied to the fields of solar power generation, rail transit, electric transmission, motor control and the like, and the driving control fields of automobile driving and hybrid power, wind energy, welding machines, locomotive traction and the like.
In power device encapsulation, in order to guarantee good contact, power module needs to use the screw installation at the in-process of customer end installation, increase the shock resistance of module, as shown in fig. 1, power module's encapsulation shell adopts traditional mounting hole among the prior art, its cylindrical inside does not possess guide structure, because clearance fit, personnel's error etc. cause easily, it is broken to lead to the fact the mounted position skew in the installation, it is broken to lead to the damage of plastic casing even, make power module inside direct exposure suffer corrosion damage at adverse circumstances and lead to power module electric property, and then destroy power module electric property, life greatly reduced.
Disclosure of Invention
The utility model aims to provide a plastic shell of a power module, which solves the technical problems;
the utility model also aims to provide a power module which solves the technical problems.
The technical problems solved by the utility model can be realized by adopting the following technical scheme:
a plastic housing of a power module comprises,
the shell is provided with a first mounting surface and second mounting surfaces arranged on two sides of the first mounting surface;
the plurality of rectangular grooves are arranged on the first mounting surface;
the mounting hole is arranged on the second mounting surface, and a plurality of thread guiding tooth openings with a certain thickness are arranged on the inner side wall of the mounting hole.
Preferably, the first mounting surface has a higher horizontal height than the second mounting surface, and a set height difference is provided between the first mounting surface and the second mounting surface, and a mounting space is provided between the first mounting surface and the second mounting surface.
Preferably, a circular hole is formed in the first mounting surface, and an ejection mechanism is further arranged on the first mounting surface.
A power module includes a power module,
the plastic shell is formed;
the second mounting surface is connected with two sides of the substrate;
the metallized ceramic substrate is arranged on the base plate, and the first mounting surface is arranged towards the metallized ceramic substrate;
the metal needle is arranged on the metallized ceramic substrate, the setting position of the round-corner rectangular groove is arranged in the position of the metal needle corresponding to the setting position of the metallized ceramic substrate, and the metal needle penetrates through the round-corner rectangular groove.
Preferably, the power chip is arranged on the metallized ceramic substrate, and the power chip is connected with the metallized ceramic substrate through metal wires.
Preferably, a sealant is filled between the first mounting surface and the metallized ceramic substrate.
Preferably, the end of the ejection mechanism on the first mounting surface abuts against the surface of the metallized ceramic substrate.
Preferably, the metal needle is a square metal needle, and the size of the circular rectangular groove is matched with the metal needle.
Preferably, the metal needle comprises a needle seat and a needle body connected with the needle seat, the needle seat is arranged on the metallized ceramic substrate, and the needle body is arranged in the round corner rectangular groove in a penetrating mode.
Preferably, the mounting structure further comprises a connecting component which is arranged in the mounting hole, and the substrate and the second mounting surface are connected through the connecting component.
The utility model has the beneficial effects that: by adopting the technical scheme, the screw guide tooth mouth is additionally arranged in the mounting hole, so that the screw can be ensured to be positioned definitely in the mounting process, dislocation during mounting of the power module can be effectively prevented, and the mounting precision is ensured while the plastic shell is not damaged during mounting.
Drawings
FIG. 1 is a schematic view of a conventional mounting hole in the prior art;
FIG. 2 is a schematic view of a plastic shell structure according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a power module according to an embodiment of the utility model;
fig. 4 is a schematic view of a metal needle according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
The utility model is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
A molded case of a power module, as shown in fig. 2, includes,
a housing 1, wherein the housing 1 is provided with a first mounting surface 11 and second mounting surfaces 12 arranged at two sides of the first mounting surface 11;
a plurality of rectangular grooves 14 provided on the first mounting surface 11;
the mounting hole 13 is arranged on the second mounting surface 12, and a plurality of thread guiding tooth openings 15 with a certain thickness are arranged on the inner side wall of the mounting hole 13.
In a preferred embodiment, the first mounting surface 11 is higher than the second mounting surface 12 in level, and a set height difference is provided between the first mounting surface 11 and the second mounting surface 12, and a mounting space is provided between the first mounting surface 11 and the second mounting surface 12.
Specifically, the plastic shell provided by the utility model is integrally molded by injection molding, the mounting hole 13 is internally provided with the thread guide tooth openings 15 for mounting and guiding, and compared with the traditional mounting hole 5 of the plastic shell in the prior art shown in fig. 1, the thread mounting and guiding structure of the mounting hole 13 can effectively prevent dislocation when the power module is mounted, and the mounting accuracy is ensured, and meanwhile, the mounting screw is ensured not to damage the plastic shell to a certain extent;
further, the casing 1 is provided with a circular rectangular groove 14, and compared with the traditional circular groove adopted by the plastic casing in the prior art, the circular rectangular groove 14 can adapt to the square metal needle 4;
in a preferred embodiment, the first mounting surface 11 is provided with a circular hole 16, and the first mounting surface 11 is further provided with an ejector mechanism 17.
In particular, the circular aperture 16 is used for subsequent sealant infusion.
A power module, as shown in fig. 3, 4, comprising,
a molded case as in any of the embodiments;
a substrate 2, the second mounting surface 12 is connected to two sides of the substrate 2;
a metallized ceramic substrate 3 provided on the base plate 2, the first mounting surface 11 being provided toward the metallized ceramic substrate 3;
the metal needle 4 is arranged on the metallized ceramic substrate 3, the arrangement position of the circular angle rectangular groove 14 corresponds to the arrangement position of the metal needle 4 on the metallized ceramic substrate 3, and the metal needle 4 penetrates through the circular angle rectangular groove 14.
In a preferred embodiment, the power chip 31 is further arranged on the metallized ceramic substrate 3, and the power chip 31 is connected with the metallized ceramic substrate 3 through metal wires.
Specifically, the metal wire is an aluminum wire, and is welded on the power chip 31 and the metallized ceramic substrate 3, and devices such as a diode and the like are also welded on the metallized ceramic substrate 3 at high temperature through solder;
in a preferred embodiment, a sealant is filled between the first mounting surface 11 and the metallized ceramic substrate 3.
Specifically, the sealant is silica gel.
In a preferred embodiment, the end of the ejection mechanism 17 on the first mounting surface 11 abuts the surface of the metallized ceramic substrate 3.
Specifically, the metallized ceramic substrate 3 will undergo bending deformation after being heated, and the ejector mechanism 17 applies pressure to the metallized ceramic substrate 3 against the metallized ceramic substrate 3, so that the metallized ceramic substrate 3 remains straight.
In a preferred embodiment, please further refer to fig. 4. The metal needle 4 is a square metal needle 4, and the size of the circular rectangular groove 14 is matched with the metal needle 4.
In a preferred embodiment, the metal needle 4 comprises a needle seat 41 and a needle body 42 connected with the needle seat 41, the needle seat 41 is arranged on the metallized ceramic substrate 3, and the needle body 42 is penetrated in the circular angle rectangular groove 14.
Specifically, compared with the round metal needle 4 of the plating part adopted by the power module in the prior art, the metal needle 4 of the square plating part is integrally formed by adopting a die in the production process, and the square needle seat 41 extends upwards to generate the square needle body 42, so that the square metal needle is integrated and does not have contact resistance; the thickness of the square needle body 42 and the square needle seat 41 are enhanced to a certain extent in terms of bending strength, and deformation is not easy to generate in the production process; therefore, the power module welded by the square plated metal pins 4 has advantages compared with the power module welded by the round plated metal pins 4 in the prior art in terms of both electrical performance and structural strength.
In a preferred embodiment, the mounting device further comprises a connecting component, wherein the connecting component is arranged in the mounting hole 13, and the substrate 2 is connected with the second mounting surface 12 through the connecting component;
specifically, the connection assembly is a screw assembly.
Specifically, three thread guiding tooth openings 15 are arranged in the mounting hole 13, the thread guiding tooth openings 15 are integrally formed in the center of the cylindrical surface of the mounting hole 13 by injection molding, the thickness is certain, the thread guiding tooth openings 15 are prevented from presenting certain degree of freedom, and the connection assembly can be ensured to be positioned clearly on the existing shell in the mounting process.
Can prevent dislocation when coupling assembling installs, ensure the installation accuracy, also guarantee to a certain extent that the casing 1 is not damaged when installing.
The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included within the scope of the present utility model.
Claims (10)
1. A plastic housing of a power module is characterized by comprising,
the shell is provided with a first mounting surface and second mounting surfaces arranged on two sides of the first mounting surface;
the plurality of rectangular grooves are arranged on the first mounting surface;
the mounting hole is arranged on the second mounting surface, and a plurality of thread guiding tooth openings with a certain thickness are arranged on the inner side wall of the mounting hole.
2. The molded case of claim 1, wherein the first mounting surface has a higher level than the second mounting surface, and a set height difference is provided between the first mounting surface and the second mounting surface, and a mounting space is provided between the first mounting surface and the second mounting surface.
3. The molded case of claim 1, wherein the first mounting surface is provided with a circular hole, and wherein the first mounting surface is further provided with an ejector mechanism.
4. A power module, characterized by comprising,
a molded case according to any one of claims 1-3;
the second mounting surface is connected with two sides of the substrate;
the metallized ceramic substrate is arranged on the base plate, and the first mounting surface is arranged towards the metallized ceramic substrate;
the metal needle is arranged on the metallized ceramic substrate, the setting position of the round-corner rectangular groove is arranged in the position of the metal needle corresponding to the setting position of the metallized ceramic substrate, and the metal needle penetrates through the round-corner rectangular groove.
5. The power module of claim 4, further comprising a power chip disposed on the metallized ceramic substrate, the power chip being connected to the metallized ceramic substrate by a wire.
6. The power module of claim 4 wherein a sealant is filled between the first mounting surface and the metallized ceramic substrate.
7. The power module of claim 4 wherein an end of the ejector mechanism on the first mounting surface abuts a surface of the metallized ceramic substrate.
8. The power module of claim 4, wherein the metal pins are square structured metal pins, and the rectangular slot is sized to fit the metal pins.
9. The power module of claim 4, wherein the metal needle comprises a needle seat and a needle body connected with the needle seat, the needle seat is arranged on the metallized ceramic substrate, and the needle body is arranged in the round-corner rectangular groove in a penetrating way.
10. The power module of claim 4, further comprising a connection assembly disposed within the mounting hole, the substrate and the second mounting surface being connected by the connection assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223301587.9U CN218996694U (en) | 2022-12-07 | 2022-12-07 | Plastic shell of power module and power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223301587.9U CN218996694U (en) | 2022-12-07 | 2022-12-07 | Plastic shell of power module and power module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218996694U true CN218996694U (en) | 2023-05-09 |
Family
ID=86218097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223301587.9U Active CN218996694U (en) | 2022-12-07 | 2022-12-07 | Plastic shell of power module and power module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218996694U (en) |
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2022
- 2022-12-07 CN CN202223301587.9U patent/CN218996694U/en active Active
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