CN215818764U

CN215818764U - Power supply module

Info

Publication number: CN215818764U
Application number: CN202121442387.8U
Authority: CN
Inventors: 王中于
Original assignee: Guangzhou Zhongyiguang Electronics Technology Co ltd
Current assignee: Guangzhou Zhongyiguang Electronics Technology Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-02-11
Anticipated expiration: 2031-06-28

Abstract

The utility model provides a power supply module which comprises a shell, a transformer and a PCB (printed circuit board), wherein the shell is fixedly connected with a PIN (personal identification number) PIN; the transformer is arranged in the shell and is connected with the PIN PIN; and the PIN is connected with the PCB. According to the power module, the PIN is fixed on the shell, the transformer is directly connected with the PIN without being welded with the PCB, so that the transformer and the PCB are separately arranged, the shell replaces a framework of the transformer, the structure is simpler, the packaging process steps are fewer, and the cost is lower.

Description

Power supply module

Technical Field

The utility model belongs to the technical field of electronic components, and particularly relates to a power module.

Background

Along with the development of science and technology, the demand of intelligent equipment such as relevant intelligent equipment such as power electronics and thing networking is miniaturized more and more to and market scale is also bigger more and more, and power module is wherein indispensable component part, and the requirement to power module has following characteristic in these equipment: 1. the volume requirement is smaller and smaller; 2. in the aspect of installation, the method is suitable for automatic production and develops towards surface mounting; 3. the reliability is high, namely, besides good quality reliability of the material, mature production process and advanced manufacturing process are required; 4. cost has the best advantages, including low material cost, and low cost of the manufacturing process.

In the existing power module structure, a transformer is fixed on a PCB (printed circuit board) through a framework and needs to be welded and connected through wave soldering, and in addition, the transformer needs to be subjected to certain insulation wrapping treatment; the PIN foot is fixed on the bottom plate of the shell. The production process of the power module comprises the following steps: (1) mounting an electronic component on a PCB (printed circuit board), and fixing the electronic component by reflow soldering; (2) welding the transformer on a PCB (printed circuit board) by wave soldering, and then cleaning; (3) and placing the welded PCB circuit board into a power module shell, pouring glue and curing, and sealing a bottom plate (cover plate) to obtain a finished product power module. According to the power module produced by the production process, the transformer needs to be welded on the PCB through wave soldering, and the shell needs to use the bottom plate (cover plate).

Therefore, there is a need for a power module with simple structure, smaller size, lower cost and fewer manufacturing steps.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a power supply module, which solves the problem that a transformer in the prior art is not welded on a PCB (printed circuit board).

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a power module is characterized by comprising a shell, a transformer and a PCB circuit board; the shell is fixedly connected with a PIN foot; the transformer is arranged in the shell and is connected with the PIN PIN; and the PIN is connected with the PCB.

In the utility model, the shell is an open cavity, and the PIN foot is fixedly connected to the open edge of the shell.

Further, the shell and the PIN foot are formed through integral injection molding.

The improved structure of the utility model can be improved in that the shell is a cuboid cavity with an opening on one surface, and an interlayer is arranged in the middle of the cavity and divides the cavity into an input cavity and an output cavity.

Further, the transformer is disposed in an input cavity within the housing.

Further, the shell input cavity is filled with a silica gel layer. And the heat dissipation of the transformer and the power module is facilitated by filling silica gel.

In the utility model, the coil input line of the transformer is connected with the input part of the PIN PIN, and the coil output line of the transformer is connected with the output part of the PIN PIN.

The utility model can also be improved in that the interlayer of the shell is provided with a groove for the output line of the transformer coil to pass through.

According to the utility model, the PCB is provided with the conductive through hole corresponding to the PIN, the conductive through hole is connected with the first bonding pad, and the PCB and the PIN are welded through the first bonding pad.

Further, the conductive through hole is electrically connected with the element on the PCB circuit board.

In the utility model, the PCB circuit board is also provided with a second bonding pad for welding with an external circuit, and the second bonding pad is electrically connected with the element gas on the PCB circuit board.

The utility model has the following beneficial effects:

(1) according to the power module, the PIN is fixed on the shell, the transformer is directly connected with the PIN without being welded with the PCB, so that the transformer and the PCB are separately arranged, the shell replaces a framework of the transformer, the structure is simpler, the packaging process steps are fewer, and the cost is lower.

(2) According to the power module, the interlayer is arranged, so that the isolation and insulation effects can be achieved, the electrical risk can be reduced under the conditions that the size of the power module is reduced and the safety distance is reduced, and meanwhile, the injection amount of silica gel can be reduced and the cost is reduced.

(3) The PCB circuit board of the power module can be directly used as a bottom cover, an additional cover plate is not needed, the size of the power module can be further reduced, and the cost is lower.

Drawings

The utility model is described in further detail below with reference to the figures and specific embodiments.

FIG. 1 is a schematic diagram of the overall structure of a power module according to the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a front view of the power module of the present invention;

FIG. 4 is a rear view of the power module of the present invention;

FIG. 5 is a left side view of the power module of the present invention;

FIG. 6 is a top view of the power module of the present invention;

FIG. 7 is a schematic structural diagram of a power module housing according to the present invention;

FIG. 8 is a front view of the power module housing of the present invention;

fig. 9 and 10 are schematic structural views of a power module PCB circuit board of the utility model;

the drawings are numbered as follows: 1. a housing; 2. a transformer; 3. a PCB circuit board; 4. a PIN PIN; 5. an interlayer; 6. a groove; 7. a conductive via; 8. a first pad; 9. a second bonding pad.

Detailed Description

As shown in fig. 1-10, the power module includes a housing 1, a transformer 2, and a PCB board 3.

Casing 1 is the open cuboid cavity in one side, the open border fixedly connected with PIN foot 4 of cavity, and PIN foot 4 and the 1 integrative injection moulding of casing form. The middle of the cavity is provided with an interlayer 5, the interlayer 5 divides the cavity into an input cavity and an output cavity, and the interlayer 5 is provided with a groove 6. The transformer 2 is composed of a magnetic ring winding coil, and the coil is divided into an input line winding and an output line winding. The transformer 2 is arranged in the input cavity, the input line of the coil of the transformer 2 is connected with the input part of the PIN PIN 4, and the output line of the coil of the transformer 2 passes through the groove 6 on the interlayer 5, enters the output cavity from the input cavity and is connected with the output part of the PIN PIN 4. The input cavity of the shell 1 is filled with a silica gel layer, and the heat dissipation of the transformer 2 and the power supply module is facilitated through the silica gel layer. PCB circuit board 3 is equipped with the electrically conductive through-hole 7 corresponding with PIN foot 4, and electrically conductive through-hole 7 is connected with first pad 8, and PCB circuit board 3 and PIN foot 4 are through first pad 8 welding, and electrically conductive through-hole 7 is connected with the component electricity on the PCB circuit board 3. The PCB circuit board 3 is also provided with a second pad 9 for welding with an external circuit, and the second pad 9 is electrically connected with an element on the PCB circuit board 3.

The packaging method of the power module comprises the following steps:

(1) putting the transformer 2 into an input cavity in the shell 1, and then welding a coil of the transformer 2 on a PIN (personal identification number) PIN 4 of the shell 1;

(2) and (3) injecting silica gel into the input cavity of the shell 1, after the silica gel is solidified, penetrating the PIN 4 on the shell 1 through the conductive through hole 7 on the PCB 3, and then carrying out reflow soldering to obtain the finished product power module.

The above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and various other modifications, substitutions and alterations can be made to the above-described structure of the present invention without departing from the basic technical concept of the present invention as described above, according to the common technical knowledge and conventional means in the field of the present invention.

Claims

1. A power module is characterized by comprising a shell (1), a transformer (2) and a PCB (printed circuit board) (3), wherein a PIN (personal identification number) PIN (4) is fixedly connected with the shell (1); the transformer (2) is arranged in the shell (1), and the transformer (2) is connected with the PIN (personal identification number) PIN (4); and the PIN (4) is connected with the PCB (printed circuit board) (3).

2. The power module according to claim 1, characterized in that the housing (1) is an open cavity, and the PIN (4) is fixedly connected to the open edge of the housing (1).

3. The power module according to claim 2, wherein the housing (1) is a cuboid cavity with an open face, an interlayer (5) is arranged in the middle of the cavity, and the interlayer (5) divides the cavity into an input cavity and an output cavity.

4. A power supply module according to claim 3, characterized in that the transformer (2) is placed in an input cavity in the housing (1).

5. The power supply module as claimed in claim 4, characterized in that the input cavity of the housing (1) is filled with silicone.

6. A power supply module according to claim 3, characterized in that the coil input line of the transformer (2) is connected to the input section of the PIN (4) and the coil output line of the transformer (2) is connected to the output section of the PIN (4).

7. The power supply module according to claim 6, characterized in that the casing (1) has a recess (6) in the partition (5), the recess (6) being provided for the coil output wire of the transformer (2) to pass through.

8. The power supply module as claimed in claim 3, wherein the PCB (3) is provided with a conductive through hole (7) corresponding to the PIN (4), the conductive through hole (7) is connected with a first bonding pad (8), and the PCB (3) and the PIN (4) are welded through the first bonding pad (8).

9. The power supply module according to claim 8, wherein the conductive via (7) is electrically connected to a component on the PCB board (3).

10. A power supply module according to claim 9, characterized in that the PCB circuit board (3) is further provided with a second pad (9) for soldering with an external circuit, the second pad (9) being electrically connected with a component on the PCB circuit board (3).