Power device installation assembly and vehicle-mounted charger

Abstract

The utility model relates to a power device installation assembly and a vehicle-mounted charger. The power device mounting assembly comprises a shell and an elastic piece, the shell comprises a device mounting part for mounting a power device in an attached manner, and the elastic piece comprises a locking part locked on the shell and an elastic arm part for elastically pressing the power device on the device mounting part in an abutting manner; the elastic piece further comprises an elastic supporting foot part, and the elastic supporting foot part acts on the shell so that the locking part can have a pre-locking state and a final locking state. In the pre-locking state, the elastic arm part is far away from the device mounting part, so that an assembly space for inserting the power device is formed between the elastic arm part and the device mounting part; and in the final locking state, the elastic arm part is close to the device mounting part so as to press the power device in the assembly space. The vehicle-mounted charger provided by the utility model comprises the power device mounting assembly. According to the power device mounting assembly and the vehicle-mounted charger provided by the invention, the assembly of the power device is facilitated, the tool cost can be reduced, and the assembly efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power device assembly, in particular to a power device mounting assembly and a vehicle-mounted charger. BACKGROUND

[0002] In the OBC (On-board charger) of a new energy vehicle, multiple MOS tubes (Metal-Oxide-Semiconductor Field-Effect Transistor) and IGBTs (Insulate-Gate Bipolar Transistor) and other power devices are used. These power devices are welded to the PCBA through pins and need to be in contact with the shell of the OBC for heat dissipation. In the prior art, the process of assembling the power devices in the OBC into the shell is relatively complex. Usually, before the power devices are welded to the PCBA, a limiting tool is used to place the power devices in the specified position in the cavity of the shell. Then, the power devices are pressed and fixed on the shell by a spring sheet, and the spring sheet is locked on the shell. Then, the prepared PCBA is positioned vertically to the pins of the power devices by a tool, so that the pins of the power devices pass through the PIN holes reserved on the PCBA board. Finally, the pins are welded and fixed to the PCBA. It can be seen that the assembly steps of the power devices in the prior art are relatively complicated, and multiple positioning tools are needed, so the assembly efficiency is relatively low.

[0003] Therefore, it is necessary to provide a new technical scheme to overcome the shortcomings of the prior art. CONTENT OF THE UTILITY MODEL

[0004] Based on this, the present application provides a power device mounting assembly and a vehicle-mounted charger, which facilitates the assembly of power devices, reduces tooling costs, and improves assembly efficiency.

[0005] To this end, the present application adopts the following technical scheme: a power device mounting assembly, comprising:

[0006] a shell, the shell comprising a device mounting portion for the power device to be attached and mounted; and

[0007] a resilient member, the resilient member comprising a locking portion locked on the shell, and a spring arm portion elastically pressing the power device on the device mounting portion;

[0008] wherein the resilient member further comprises a resilient leg portion acting on the shell, so that the locking portion has a pre-locking state and a final locking state;

[0009] In the pre-locked state, the elastic leg portion is elastically abutted against the housing, and the elastic leg portion is away from the device mounting portion to form an assembling space between the elastic leg portion and the device mounting portion for inserting the power device;

[0010] In the final-locked state, the elastic leg portion is further pressed, and the elastic leg portion is close to the device mounting portion to compress the power device in the assembling space.

[0011] In some embodiments, the locking portion is a plate body, and a plurality of locking holes are formed in the plate body for passing through the screws.

[0012] In some embodiments, one end of the elastic leg portion is connected to the locking portion, and the other end extends downwardly to the locking portion.

[0013] In some embodiments, the elastic member is a metal elastic sheet, and the elastic leg portion is punched and bent from two sides or the middle of the locking portion.

[0014] In some embodiments, the housing comprises a supporting surface for abuttingly mounting the locking portion, and an included angle of 10°-20° is formed between the locking portion in the pre-locked state and the supporting surface.

[0015] In some embodiments, a plurality of the power devices are welded on a control board, and the plurality of the power devices and the control board are integrally mounted in the housing, wherein the housing and the control board are provided with positioning components matched with each other.

[0016] In some embodiments, the positioning components comprise a positioning pin arranged on the housing and a positioning hole formed in the control board.

[0017] In some embodiments, the locking portion is locked on the housing by the screws, and the control board is provided with avoiding holes corresponding to the screws, so that an operating tool passes through the avoiding holes to tighten or loosen the screws.

[0018] In some embodiments, the power device is a MOS tube or an IGBT.

[0019] The application also adopts the following technical scheme: a vehicle-mounted charging machine, comprising a control board, power devices welded on the control board, and a power device mounting assembly as described in any one of the above embodiments.

[0020] The power device mounting assembly provided by the application comprises an elastic member provided with an elastic leg portion acting on a shell, so that the elastic member has a pre-locking state and a final locking state, in the pre-locking state, the elastic leg portion elastically abuts against the shell, and an elastic arm portion is away from a device mounting portion, so as to form an assembly space for inserting a power device between the elastic arm portion and the device mounting portion, in the final locking state, the elastic leg portion is further pressed, and the elastic arm portion is close to the device mounting portion, so as to press the power device in the assembly space; in this way, the use of assembly tooling is reduced, the assembly process is simplified, and the assembly efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the power device mounting assembly of the present application.

[0023] Figure 2 It is a perspective view of the elastic member in an embodiment of the power device mounting assembly of the present application.

[0024] Figure 3 It is a side view of the elastic member in an embodiment of the power device mounting assembly of the present application.

[0025] Figure 4 It is a schematic diagram of the assembly of the power device and the power device mounting assembly in an embodiment of the present application.

[0026] Figure 5 It is a schematic diagram of the locking of the screw by the operating tool in an embodiment of the power device mounting assembly of the present application.

[0027] The element reference numbers are as follows:

[0028] 100, power device mounting assembly; 1, shell; 11, support surface; 12, device mounting portion; 101, assembly space; 2, elastic member; 21, locking portion; 210, locking hole; 22, elastic arm portion; 23, elastic leg portion; 3, screw; 4, power device; 5, control panel; 51, avoiding hole; 6, operating tool. DETAILED DESCRIPTION

[0029] To make the above objectives, features and advantages of the present application more clear, the specific embodiments of the present application will be described in detail below with reference to the drawings. Numerous specific details will be set forth in the following description in order to provide a thorough understanding of the present application. However, it will be appreciated by those skilled in the art that the present application can be practiced in a variety of ways beyond the specific details set forth in the description below, which are presented for purposes of example and explanation and not for limitation of the present application.

[0030] It is to be noted that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements or layers present. The use of the terms "on" and "connected to" in the present description are to be construed in the broadest sense and can include over, under, or adjacent.

[0031] In addition, the terms "first", "second", and the like, do not denote any quantity or order but are used as labels for naming various elements. Thus, a first element could be discussed as being, for example, a "second" element without departing from the teachings of the present application. The terms "including" and / or "containing", or the like, as used herein, are meant to be equivalent in that they encompass the terms "consisting of" and "consisting essentially of".

[0032] In the present application, unless specifically stated and limited otherwise, the terms "on", "under", "above", and "below" can mean that the first element is directly in contact with the second element, or that the first element is indirectly in contact with the second element through an intermediate medium. Also, the terms "on", "above", and "over" can mean that the first element is directly above or diagonally above the second element, or that the first element is merely horizontally higher than the second element. The terms "under", "below", and "underneath" can mean that the first element is directly below or diagonally below the second element, or that the first element is merely horizontally lower than the second element.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0034] Reference will now be made to Figures 1 to 5As shown, the application provides a power device mounting assembly 100 for mounting a power device 4. In an embodiment, the power device mounting assembly 100 is part of an on-board charger for mounting a power device 4 in the on-board charger.

[0035] In the embodiment, the power device mounting assembly 100 comprises a housing 1 and an elastic member 2. The housing 1 comprises a device mounting portion 12 for mounting the power device 4. The elastic member 2 comprises a locking portion 21 locked on the housing 1, and an elastic arm portion 22 elastically pressing the power device 4 against the device mounting portion 12. The elastic member 2 further comprises an elastic leg portion 23 acting on the housing 1 to make the locking portion 21 have a pre-locking state and a final-locking state. In the pre-locking state of the locking portion 21, the elastic leg portion 23 elastically abuts against the housing 1, and the elastic arm portion 22 is away from the device mounting portion 12 to form an assembly space 101 between the elastic arm portion 22 and the device mounting portion 12 for inserting the power device 4. In the final-locking state of the locking portion 21, the elastic leg portion 23 is further pressed, and the elastic arm portion 22 is close to the device mounting portion 12 to press the power device 4 in the assembly space 101.

[0036] The power device mounting assembly 100 provided by the application comprises the elastic member 2 provided with the elastic leg portion 23 acting on the housing 1 to make the elastic member 2 have the pre-locking state and the final-locking state. In the pre-locking state, the elastic leg portion 23 elastically abuts against the housing 1, and the elastic arm portion 22 is away from the device mounting portion 12 to form the assembly space 101 between the elastic arm portion 22 and the device mounting portion 12 for inserting the power device 4. In the final-locking state, the elastic leg portion 23 is further pressed, and the elastic arm portion 22 is close to the device mounting portion 12 to press the power device 4 in the assembly space 101. Thus, the use of assembly tooling is reduced, the assembly process is simplified, and the assembly efficiency is improved.

[0037] Please refer to Figure 1 and Figure 4As shown, the shell 1 has a chamber, and the power device 4 is installed in the chamber. The power device 4 can be a MOS tube, an IGBT or other power type electrical component. The shell 1 comprises a support surface 11 and a device mounting portion 12. In the embodiment, the support surface 11 is a plane parallel to the bottom wall of the chamber, and the device mounting portion 12 is a vertical plate extending upward from the bottom wall of the chamber. The power device 4 is attached to one side vertical surface of the device mounting portion 12. In the embodiment, the device mounting portion 12 is made of metal, which can provide excellent heat dissipation; in other embodiments, the device mounting portion 12 can also be made of other materials. The device mounting portion 12 is perpendicular to the support surface 11, and the support surface 11 is used for mounting the locking portion 21. The elastic member 2 can be locked on the support surface 11 through the locking portion 21 and the screw 3, and the power device 4 can be pressed tightly by the elastic arm portion 22 and the device mounting portion 12.

[0038] Please refer to Figure 2 and Figure 3 As shown, in the embodiment, the elastic member 2 is a metal spring, the locking portion 21 is a plate body, and the elastic arm portion 22 and the locking portion 21 intersect to form an L shape. In other words, the locking portion 21 extends horizontally, and the elastic arm portion 22 is bent from one end of the locking portion 21 and extends vertically. The locking portion 21 is provided with a plurality of locking holes 210 through which the screw 3 passes to be locked on the support surface 11 of the shell 1. It can be understood that the support surface 11 is correspondingly provided with threaded holes. The elastic arm portion 22 is provided with multiple bends, which can increase the elasticity of the elastic arm portion 22. In the embodiment, the elastic arm portion 22 is bent into an S shape. Of course, in other embodiments, the elastic arm portion 22 can also be provided in other shapes, which are not limited in the present application.

[0039] Please refer to Figure 2 and Figure 3 As shown, in the embodiment, the elastic leg portion 23 is connected to the locking portion 21. Specifically, one end of the elastic leg portion 23 is connected to the locking portion 21, and the other end extends downward of the locking portion 21. Since the elastic member 2 is a metal member, the elastic leg portion 23 and the locking portion 21 are integrally formed by a metal plate. In the embodiment, the elastic leg portion 23 is formed by punching and bending from both sides of the locking portion 21. In other embodiments, the elastic leg portion 23 can also be formed by punching and bending from the middle of the locking portion 21. Since one end of the elastic leg portion 23 is connected to the locking portion 21, and the other end is not connected and extends downward of the locking portion 21, forming a cantilever shape, so that it can abut against the support surface 11 to provide elastic force when the locking portion 21 is installed on the support surface 11.

[0040] In the embodiment, the locking portion 21 is locked to the supporting surface 11 of the shell 1 by the screw 3. When the screw 3 is completely locked, the locking portion 21 is completely attached to the supporting surface 11, and the final locking state is achieved. When the screw 3 is only partially locked, the locking portion 21 is not attached to the supporting surface 11 due to the elastic support of the elastic leg portion 23 and the supporting surface 11, and the pre-locking state is achieved. In the embodiment, an included angle A of 10° to 20° is formed between the locking portion 21 in the pre-locking state and the supporting surface 11, and preferably, the included angle A is 12° to 15°.

[0041] In the embodiment, the elastic leg portion 23 is provided, and in the pre-locking state, the elastic leg portion 23 is elastically supported on the supporting surface 11. Therefore, although the screw 3 is not completely locked in the pre-locking state, the connection of the elastic member 2 on the shell 1 is relatively stable and is not easily shaken, which is beneficial to precise alignment and improves assembly efficiency. It should be noted that the pre-locking state refers to the state in which the screw 3 is not completely locked, and at this time, the elastic leg portion 23 is in a state of being pressed but still elastically raised, and the locking portion 21 is not attached to the supporting surface 11, and an included angle A is formed therebetween. The length of the screw 3 or the number of turns of the screw 3 in the pre-locking state is not limited in the application, and a person skilled in the art can set it according to actual needs. When the power device 4 is installed in the assembly space 101, the locking portion 21 is further locked from the pre-locking state to the final locking state. In this process, the elastic leg portion 23 is further pressed from the elastically raised state to the pressed state, and the elastic arm portion 22 moves towards the device mounting portion 12 to press the power device 4 in the assembly space 101.

[0042] Please refer to Figure 4 and Figure 5As shown, in the present embodiment, the plurality of power devices 4 are pre-welded on the control board 5, and the plurality of power devices 4 and the control board 5 are integrally installed in the shell 1. Specifically, the control board 5 and the power devices 4 can be pre-welded by the manufacturer of the control board 5 before leaving the factory, and then the control board 5 with the pre-welded power devices 4 is assembled into the power device mounting assembly 100. In this way, during the assembly into the power device mounting assembly 100, the complex positioning of the plurality of power devices 4 is avoided, and the welding process is saved. Further, the shell 1 and the control board 5 are provided with positioning components that cooperate with each other to ensure that the power devices 4 are installed in place in the shell 1. In the present embodiment, the positioning components include positioning pins provided on the shell 1 and positioning holes provided on the control board 5, and the positioning pins and the positioning holes are inserted and fitted to achieve accurate positioning of the control board 5 and the power devices 4 pre-welded thereon in the shell 1.

[0043] Please refer to Figure 5 As shown, after the control board 5 is positioned on the shell 1 and the power devices 4 are inserted into the assembly space 101, the elastic member 2 needs to be locked into the final locked state. In order to avoid the control board 5 blocking the screw 3 directly above and making it inconvenient to use the operating tool 6 to tighten the screw 3, in the present embodiment, the control board 5 is provided with a plurality of avoiding holes 51 corresponding to the screws 3, and the operating tool 6 can pass through the avoiding holes 51 to contact the screws 3 to tighten or loosen the screws 3. In the present embodiment, the avoiding holes 51 are a plurality of through holes corresponding to each screw 3; in other embodiments, the avoiding holes 51 can also be an integral long strip-shaped hole. The operating tool 6 is a locking driver head matched with the screw 3.

[0044] Please refer to Figure 4 and Figure 5As shown, during installation, first, the elastic member 2 is pre-connected to the support surface 11 of the housing 1 through the screw 3, at this time, the screw 3 is only screwed in a part, the elastic leg portion 23 of the elastic member 2 is elastically supported on the support surface 11 and is in a raised state, the locking portion 21 has an angle of about 12° with the support surface 11, and the elastic arm portion 22 of the elastic member 2 and the device mounting portion 12 of the housing 1 have an assembly space 101; then, the control board 5 with the power device 4 welded is installed in the housing 1 in a manner that the power device 4 faces downward, the control board 5 is installed in place through the cooperation of the positioning hole and the positioning pin, at this time, the power device 4 also falls into the assembly space 101; finally, the screw head of the screw is inserted through the reserved avoiding hole 51 of the control board 5 to further lock the screw 3 pre-locked on the locking portion 21, in the locking process, the elastic leg portion 23 is further flattened, finally, the locking portion 21 is attached to the support surface 11, and the elastic arm portion 22 tightly fixes the power device 4 on the device mounting portion 12 of the housing 1, that is, the installation is completed.

[0045] The application also provides a vehicle-mounted charger, which comprises the control board 5, the power device 4 welded on the control board 5, and the power device mounting assembly 100 as described in any of the above embodiments.

[0046] From the above description of the specific embodiments, it can be known that the power device mounting assembly 100 provided by the application comprises the elastic member 2 provided with the elastic leg portion 23, the elastic leg portion 23 acts on the housing 1, so that the elastic member 2 has a pre-locked state and a final-locked state, in the pre-locked state, the elastic leg portion 23 elastically abuts against the housing 1, and the elastic arm portion 22 is away from the device mounting portion 12, so as to form the assembly space 101 between the elastic arm portion 22 and the device mounting portion 12 for inserting the power device 4, in the final-locked state, the elastic leg portion is further pressed, and the elastic arm portion 22 is close to the device mounting portion 12, so as to tightly press the power device 4 in the assembly space 101; in this way, the use of assembly tools is reduced, the assembly process is simplified, and the assembly efficiency is improved.

[0047] The technical features of the above-described embodiments can be combined in any manner, and in order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0048] The above-described embodiments only express several implementation manners of the application, the description is relatively specific and detailed, but it should not be understood as the limitation on the patent application scope. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. A power device mounting assembly, characterized by, The power device mounting assembly comprises: a housing, which comprises a device mounting portion for mounting a power device thereon; and an elastic member, which comprises a locking portion locked on the housing, and an elastic arm portion for elastically pressing the power device on the device mounting portion; wherein the elastic member further comprises an elastic leg portion, which acts on the housing to make the locking portion have a pre-locking state and a final locking state; when the locking portion is in the pre-locking state, the elastic leg portion elastically abuts against the housing, and the elastic arm portion is away from the device mounting portion to form an assembly space between the elastic arm portion and the device mounting portion for inserting the power device; when the locking portion is in the final locking state, the elastic leg portion is further pressed, and the elastic arm portion is close to the device mounting portion to compress the power device in the assembly space.

2. The power device mounting assembly of claim 1, wherein, The locking portion is a plate body, and a plurality of locking holes for passing through screws are formed in the plate body.

3. The power device mounting assembly of claim 2, wherein, One end of the elastic leg portion is connected to the locking portion, and the other end extends downwardly to the locking portion.

4. The power device mounting assembly of claim 3, wherein, The elastic member is a metal elastic sheet, and the elastic leg portion is formed by punching and bending from both sides or the middle of the locking portion.

5. The power device mounting assembly of claim 2, wherein, The housing comprises a supporting surface for mounting the locking portion thereon, and an included angle of 10-20° is formed between the locking portion in the pre-locking state and the supporting surface.

6. The power device mounting assembly of claim 1, wherein, A plurality of the power devices are welded on a control board, and the plurality of power devices and the control board are integrally mounted in the housing, wherein the housing and the control board are provided with positioning components matched with each other.

7. The power device mounting assembly of claim 6, wherein, The positioning components comprise a positioning pin arranged on the housing and a positioning hole formed in the control board.

8. The power device mounting assembly of claim 6, wherein, The locking portion is locked on the housing by a screw, and the control board is provided with an avoiding hole corresponding to the screw, so that an operating tool can pass through the avoiding hole to tighten or loosen the screw.

9. The power device mounting assembly of claim 1, wherein, The power device is a MOS tube or an IGBT.

10. An on-board charger, characterized by, The power device mounting assembly comprises a control board, power devices welded on the control board, and the power device mounting assembly as claimed in any one of claims 1-9.

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