Power supply module capable of avoiding expansion and swelling

Abstract

The utility model discloses a power supply module capable of avoiding expansion and swelling. The power supply module comprises a housing, a circuit board arranged in the housing, and a plurality of components arranged on the circuit board. The epoxy resin encapsulation layer is arranged in the shell and used for fixedly installing the circuit board in the shell, and the through hole is formed in the epoxy resin encapsulation layer and the circuit board in a penetrating mode and communicated with the interior of the shell. According to the utility model, through holes are arranged on the epoxy resin potting layer and the circuit board, and the inside of the shell is communicated with the outside through the through holes, so that internal and external air pressure is balanced, and the phenomenon that the shell is swelled and even components are damaged to cause product damage due to the fact that the internal air pressure is increased due to high temperature of a product in the use process is avoided.

Description

Technical Field

[0001] The utility model relates to a power module, in particular to a power module which can avoid expansion and bulging. Background Art

[0002] The existing power module includes a housing, a circuit board, and several components mounted on the circuit board. When the power module is used as a component on the control board of an electrical device, it will go through a wave soldering process in a high-temperature environment. The power module with epoxy resin encapsulation at the bottom of the housing will cause the internal air pressure of the housing to increase in a high-temperature environment. Once the internal air pressure increases, it is easy to cause the housing to deform and bulge, and even damage the components sensitive to air pressure in the housing, which seriously affects the service life of the product. Therefore, a power module that avoids expansion and bulging is proposed. Utility Model Content

[0003] The utility model aims to solve the above problems and provides a power module which can avoid expansion and bulging.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a power module that avoids expansion and bulging, including a shell, a circuit board installed in the shell, and a plurality of components installed on the circuit board; it is characterized in that it also includes an epoxy resin potting layer arranged in the shell for fixing the circuit board in the shell, and a through hole penetrating the epoxy resin potting layer and the circuit board and communicating with the interior of the shell.

[0005] Further preferably, the circuit board is also connected with an output terminal and an input terminal, and the output terminal and the input terminal pass through the epoxy resin potting layer.

[0006] Further preferably, a limit platform for limiting the installation position of the circuit board is provided on the housing.

[0007] The beneficial effects of the utility model are as follows: through holes are opened on the epoxy resin potting layer and the circuit board, and the interior of the shell is connected with the outside through the through holes, so as to balance the internal and external air pressures, thereby avoiding bulging of the shell due to increased internal air pressure due to high temperature of the product during use, and even damaging components and causing product damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Attached Figure 1 It is a structural schematic diagram of the utility model;

[0009] Attached Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0010] Legend: 1. Shell; 2. Circuit board; 21. Output terminal; 22. Input terminal; 3. Components; 4. Epoxy resin potting layer; 5. Through hole; 6. Limit table. DETAILED DESCRIPTION

[0011] Next, we will further explain the power module for preventing expansion and bulging described in the present invention in conjunction with the accompanying drawings.

[0012] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0013] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; 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 the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] See also Figure 1-2 As shown in the figure, a power module for preventing expansion and bulging includes a housing 1, a circuit board 2 installed in the housing 1, and a plurality of components 3 installed on the circuit board 2; it is characterized in that it also includes an epoxy resin potting layer 4 arranged in the housing 1 for fixing the circuit board 2 in the housing 1, and a through hole 5 penetrating the epoxy resin potting layer 4 and the circuit board 2 and communicating with the inside of the housing 1;

[0015] By opening a through hole 5 on the epoxy resin potting layer 4 and the circuit board 2, the interior of the shell 1 is connected to the outside through the through hole 5 to balance the internal and external air pressure, thereby preventing the shell 1 from bulging due to the increase in internal air pressure due to high temperature of the product during use, and even damaging the components 3 and causing damage to the product.

[0016] In one embodiment, the circuit board 2 is also connected to an output terminal 21 and an input terminal 22, and the output terminal 21 and the input terminal 22 pass through the epoxy resin potting layer 4; one end of the output terminal 21 and the input terminal 22 passes through the epoxy resin potting layer 4 for connection with other devices.

[0017] In one embodiment, a limiting platform 6 is provided on the housing 1 to limit the installation position of the circuit board 2 ; the installation position of the circuit board 2 is limited by the setting of the limiting platform 6 .

[0018] The protection scope of the present utility model is not limited to the above embodiments and their variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment all fall within the protection scope of the present utility model.

Claims

1. A power module for preventing expansion and bulging, comprising a housing (1), a circuit board (2) installed in the housing (1), and a plurality of components (3) installed on the circuit board (2); wherein the power module comprises: It also includes an epoxy resin potting layer (4) disposed in the housing (1) for fixing the circuit board (2) in the housing (1), and a through hole (5) penetrating the epoxy resin potting layer (4) and the circuit board (2) and communicating with the interior of the housing (1).

2. A power module for preventing swelling according to claim 1, characterized in that: The circuit board (2) is also connected to an output end (21) and an input end (22), and the output end (21) and the input end (22) pass through the epoxy resin potting layer (4).

3. A power module for preventing swelling according to claim 1, characterized in that: The housing (1) is provided with a limiting platform (6) which serves to limit the installation position of the circuit board (2).

Images