connection terminal

Abstract

The application relates to a connecting terminal. The connecting terminal is used for a power module, and comprises a plug part, a buffer part, a connecting part and a supporting part. The buffer part comprises a first buffer part and a second buffer part connected with each other, and the first buffer part is located between the plug part and the second buffer part. The supporting part is connected with the connecting part, and the supporting part comprises a first supporting part and a second supporting part connected with each other, at least part of the surface of the first supporting part is arranged opposite to the first buffer part, the first supporting part is located on the side of the first buffer part away from the plug part, and at least part of the second buffer part is arranged side by side with the second supporting part. The first buffer part is configured to deform towards the first supporting part when the connecting terminal is pressed, so that the first buffer part presses against the first supporting part. The second supporting part is configured to rotate relative to the connecting part when the first supporting part is pressed, so as to support the first buffer part. The application can effectively improve the structural strength of the connecting terminal.

Description

Technical Field

[0001] This application relates to the field of power module manufacturing technology, and in particular to a connection terminal. Background Technology

[0002] Power modules are widely used in power control devices such as AC motors, variable frequency speed controllers, and DC choppers, in industrial automation fields such as power heating, frequency converters, inverters, and welding machines. Traditional power modules generally consist of power semiconductor chips, a ceramic copper-clad substrate, bonding wires, and connection terminals. The components are usually soldered onto the ceramic copper-clad substrate to form the main circuit.

[0003] In related technologies, the top of the connection terminal usually needs to pass through the external PCB board to realize the signal interconnection between the power module and the external circuit. However, the assembly process of the connection terminal and the external PCB board or operation in a vibration environment can cause irreversible damage to the connection terminal. Therefore, how to improve the structural strength of the connection terminal has always been a research direction in power module manufacturing technology. Summary of the Invention

[0004] The connection terminals provided in this application embodiment can effectively improve the structural strength of the connection terminals, thereby increasing their service life.

[0005] On one hand, according to an embodiment of this application, a connection terminal is provided for a power module. The connection terminal includes a plug portion, a buffer portion, a connecting portion, and a support portion. The buffer portion is connected to the plug portion and includes a first buffer portion and a second buffer portion connected together, with the first buffer portion located between the plug portion and the second buffer portion. The connecting portion is located on the side of the second buffer portion facing away from the first buffer portion. The support portion is connected to the connecting portion and includes a first support portion and a second support portion connected together. At least a portion of the surface of the first support portion is disposed opposite to the first buffer portion, and the first support portion is located on the side of the first buffer portion facing away from the plug portion. At least a portion of the second buffer portion is arranged side by side with the second support portion. The first buffer portion is configured such that when the connection terminal is pressed, the first buffer portion deforms toward the first support portion to press against the first support portion. The second support portion is configured such that when the first support portion is pressed, the second support portion rotates relative to the connecting portion to support the first buffer portion.

[0006] According to one aspect of the embodiments of this application, the second support is configured such that when the first support is compressed, the end of the second support away from the connecting portion abuts against the second buffer portion.

[0007] According to one aspect of the embodiments of this application, the second support portion tends to move closer to the second buffer portion along the direction from the connecting portion to the plug portion.

[0008] According to one aspect of the embodiments of this application, the first support portion is rotatably connected to the second support portion.

[0009] According to one aspect of the embodiments of this application, the first support portion includes a first surface and a first end portion and a second end portion located opposite to each other on the first surface along a first direction. The first buffer portion is configured such that when the connection terminal is pressed, the first buffer portion deforms to press against at least a portion of the surface of the first surface near the first end portion. The second support portion is connected to the second end portion, and the first direction intersects with the thickness direction of the first support portion.

[0010] According to one aspect of the embodiments of this application, the second support is configured such that when the first support is compressed, the second support rotates relative to the connecting portion so that the side of the second support away from the connecting portion moves away from the second buffer portion.

[0011] According to one aspect of the embodiments of this application, the first support portion includes a first surface and a first end portion and a second end portion located opposite to each other on the first surface along a first direction. The first buffer portion is configured such that when the connection terminal is pressed, the first buffer portion deforms to press against at least a portion of the surface of the first surface near the first end portion. The second support portion is connected to the first end portion, and the first direction intersects the thickness direction of the first support portion.

[0012] According to one aspect of the embodiments of this application, along the direction from the connecting portion to the plug portion, the second support portion tends to move away from the second buffer portion.

[0013] According to one aspect of the embodiments of this application, the first support portion is provided with a limiting groove, which is formed by a recess in one side surface of the first support portion facing the first buffer portion. The first buffer portion is provided with a protrusion, which is formed by a protrusion in one side surface of the first buffer portion facing the first support portion. Wherein, when the first support portion is configured such that a minimum portion of the first support portion abuts against a minimum portion of the first buffer portion when the connecting terminal is pressed, and a minimum portion of the protrusion is located within the limiting groove.

[0014] According to one aspect of the embodiments of this application, at least one of the surface roughness of the first buffer portion facing the first support portion and the surface of the first support portion facing the first buffer portion is greater than or equal to 2 μm.

[0015] According to one aspect of the embodiments of this application, the buffer part further includes a third buffer part, the first buffer part is connected to the plug part through the third buffer part, the first buffer part is located on the side of the third buffer part away from the plug part, the included angle between the first buffer part and the reference plane is α, the included angle between the third buffer part and the reference plane is β, α < β, and the reference plane and the plane where the connecting part is located are parallel.

[0016] According to one aspect of the embodiments of this application, the connecting terminal is a plate-shaped structure.

[0017] According to the connection terminal provided in this application, by providing a buffer portion and a support portion, when the connection terminal is subjected to pressure, the connection terminal will transmit the pressure to the buffer portion. When the first buffer portion is subjected to pressure, the first buffer portion will deform, causing it to press against the first support portion. Under the action of pressure, the first support portion will drive the second support portion to rotate, causing the second support portion to move closer to or away from the second buffer portion. When the second support portion moves closer to the second buffer portion, it can abut against the second buffer portion to provide support force to the first buffer portion. When the second buffer portion moves away from the second buffer portion, the second support portion can approximately form two sides of a trapezoid or rectangle with the second buffer portion. The second support portion and the second buffer portion together support the first buffer portion to offset the pressure on the connection terminal, thereby reducing the risk of damage to the connection terminal under pressure and improving the structural strength of the connection terminal. Attached Figure Description

[0018] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0019] Figure 1 This application provides a schematic diagram of the structure of a connection terminal according to some embodiments;

[0020] Figure 2 A side view of a connection terminal provided for some embodiments of this application;

[0021] Figure 3 A side view of a connection terminal under pressure, provided for some embodiments of this application;

[0022] Figure 4 A side view of another connection terminal provided in some embodiments of this application;

[0023] Figure 5 A side view of another connection terminal under pressure, provided in some embodiments of this application;

[0024] Figure 6 A cross-sectional structural diagram of another connection terminal under pressure, provided in some embodiments of this application.

[0025] Figure 7 for Figure 6 A magnified schematic diagram of P.

[0026] Marker explanation:

[0027] 10. Plug section;

[0028] 20. Buffer section; 21. First buffer section; 212. Protrusion; 22. Second buffer section; 23. Third buffer section;

[0029] 30. Connecting part;

[0030] 40. Support part; 41. First support part; 411. First end; 412. Second end; 413. Limiting groove; 42. Second support part;

[0031] 50. Transition section;

[0032] S1, first surface; S2, reference surface;

[0033] X, the first direction; Y, the second direction.

[0034] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0035] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and not to limit it. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating examples.

[0036] It should be noted that, in this document, relational terms such as "first child" and "second child" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0037] To better understand this application, on the one hand, the following will combine... Figures 1 to 7 The connection terminals according to the embodiments of this application will be described in detail.

[0038] Figure 1 This is a schematic diagram of the structure of a connection terminal provided in some embodiments of this application. Figure 2 This is a side view of a connection terminal provided in some embodiments of this application.

[0039] like Figure 1 and Figure 2As shown, this application embodiment provides a connection terminal for a power module. The connection terminal includes a plug portion 10, a buffer portion 20, a connecting portion 30, and a support portion 40. The buffer portion 20 is connected to the plug portion 10 and includes a first buffer portion 21 and a second buffer portion 22 connected together. The first buffer portion 21 is located between the plug portion 10 and the second buffer portion 22. The connecting portion 30 is located on the side of the second buffer portion 22 facing away from the first buffer portion 21. The support portion 40 is connected to the connecting portion 30 and includes a first support portion 41 and a second support portion 42 connected together. At least a portion of the surface of the first support portion 41 is disposed opposite to the first buffer portion 21, and the first support portion 41 is located on the side of the first buffer portion 21 facing away from the plug portion 10. At least a portion of the second buffer portion 22 is arranged side by side with the second support portion 42. The first buffer portion 21 is configured such that when the connection terminal is pressed, the first buffer portion 21 deforms toward the first support portion 41 to press against the first support portion 41. The second support portion 42 is configured to rotate relative to the connecting portion 30 to support the first buffer portion 21 when the first support portion 41 is compressed.

[0040] Optionally, the plug portion 10 includes a plug-in portion, the shape of which may be fisheye-shaped. For example, the plug-in portion includes an elliptical fisheye hole. Of course, the shape of the plug-in portion is not particularly limited in this embodiment, as long as it can ensure electrical connection between the plug-in portion and the external PCB board.

[0041] Optionally, the connecting terminal may further include a transition portion 50, which is located between the insertion / removal portion and the first buffer portion 21. The transition portion 50 extends and can adjust the overall height of the connecting terminal to improve its applicability. Optionally, a transition portion 50 may also be provided between the first buffer portion 21 and the second buffer portion 22 to increase the overall height of the connecting terminal.

[0042] Optionally, the material of the connecting terminal includes a conductive metal material; for example, the material of the connecting terminal includes phosphor bronze.

[0043] Optionally, the plug portion 10 and the buffer portion 20 are an integral structure.

[0044] As an example, both the plug portion 10 and the buffer portion 20 are flat plate structures, which are formed by processes such as stamping and wire cutting.

[0045] The buffer section 20 includes a first buffer section 21 and a second buffer section 22 connected to each other, and the first buffer section 21 and the second buffer section 22 can be an integral structure. The first buffer section 21 and the second buffer section 22 can be made of the same material.

[0046] The first buffer part 21 and the second buffer part 22 can be fixedly connected. Of course, the first buffer part 21 and the second buffer part 22 can also be rotatably connected. In the embodiments of this application, the first buffer part 21 and the second buffer part 22 can be rotatably connected, and the first buffer part 21 can rotate with the connection between the first buffer part 21 and the second buffer part 22 as the rotation base point when it is subjected to pressure.

[0047] Furthermore, the side of the connector 30 facing away from the plug portion 10 can be fixedly connected to the ceramic copper-clad substrate. A power chip can be disposed on the side of the ceramic copper-clad substrate facing away from the connector 30. Optionally, the connector 30 can be a rectangular block structure. Optionally, the connector and the ceramic copper-clad substrate can be fixed by soldering, sintering silver soldering, ultrasonic welding, or other methods.

[0048] Taking the connection terminal as a plate-shaped structure as an example, the plane where the plug part 10 is located and the plane where the connection part 30 is located can be arranged to intersect. Optionally, the plane where the plug part 10 is located and the plane where the connection part 30 is located can be arranged to be perpendicular.

[0049] Optionally, the orthographic projection of the plug portion 10 onto the connector portion 30 may be located at the center of the connector portion 30.

[0050] Optionally, the orthographic projection of the buffer portion 20 onto the connecting portion 30 may be located at the center of the connecting portion 30.

[0051] Optionally, the flexural modulus of the first buffer portion 21 is less than that of the second buffer portion 22. Further, the flexural modulus at the junction of the first buffer portion 21 and the second buffer portion 22 is less than that of the first buffer portion 21, and the flexural modulus at the junction of the first buffer portion 21 and the second buffer portion 22 is less than that of the second buffer portion 22, so that when the first buffer portion 21 is subjected to pressure, the first buffer portion 21 can rotate around the junction between the first buffer portion 21 and the second buffer portion 22 as a pivot point. Of course, the first buffer portion 21 can also rotate around any position of itself as a pivot point, so that at least a portion of the first buffer portion 21 presses against the first support portion 41.

[0052] Optionally, the support part 40 and the connecting part 30 can be fixedly connected by welding, riveting, bolting, or other means. Of course, the support part 40 and the connecting part 30 can also be rotatably connected by hinges, bending, or other means.

[0053] Optionally, the first buffer portion 21 and the first support portion 41 are disposed opposite to each other. The direction in which the first buffer portion 21 and the first support portion 41 are disposed opposite to each other is defined as the second direction Y. Along the second direction Y, the projections of the first buffer portion 21 and the first support portion 41 can overlap. Alternatively, along the second direction Y, the projections of the first buffer portion 21 and the first support portion 41 can partially overlap. Or, along the second direction Y, one projection of the first buffer portion 21 and the first support portion 41 can fall within the projection of the other. Optionally, the second direction Y can be parallel to the thickness direction of the first support portion 41. The following examples illustrate this using the second direction Y as the thickness direction of the first support portion 41 or the side-by-side arrangement direction of the first support portion 41 and the first buffer portion 21.

[0054] Optionally, in the direction from the connecting part 30 to the plug part 10, the second buffer part 22 may tend to move away from the second support part 42.

[0055] Optionally, the minimum distance between the first support part 41 and the first buffer part 21 can be D, where 1mm≤D≤3mm.

[0056] Optionally, the surface of the first support portion 41 facing the first buffer portion 21 can be disposed opposite to the surface of the first buffer portion 21 facing the first support portion 41 along the second direction Y. Further, the surface area of ​​the first support portion 41 can be larger than the surface area of ​​the first buffer portion 21.

[0057] Optionally, when the first support portion 41 is compressed, the second support portion 42 can rotate around the connection point between the second support portion 42 and the connecting portion 30 as the rotation base point. Alternatively, the second support portion 42 can rotate around any position of itself as the rotation base point.

[0058] Optionally, when the first support portion 41 is compressed, relative movement, such as relative rotation, may occur between the second support portion 42 and the first support portion 41. Of course, relative movement may not occur.

[0059] Optionally, when the first support 41 is compressed, the second support 42 can rotate toward the second buffer 22 or toward the second buffer 22.

[0060] This embodiment of the application, by providing a buffer portion 20 and a support portion 40, allows the connecting terminal to transmit pressure to the buffer portion 20 when it is subjected to pressure. When the first buffer portion 21 is subjected to pressure, it forms a shape that causes it to press against the first support portion 41. Under pressure, the first support portion 41 drives the second support portion 42 to rotate, causing it to move closer to or away from the second buffer portion 22. When the second support portion 42 moves closer to the second buffer portion 22, it can abut against the second buffer portion 22 to provide support for the first buffer portion 21. When the second buffer portion 22 moves away from the second buffer portion 22, the second support portion 42 can approximately form two sides of a trapezoid or rectangle with the second buffer portion 22. The second support portion 42 and the second buffer portion 22 together support the first buffer portion 21 to offset the pressure on the connecting terminal, thereby reducing the risk of damage to the connecting terminal under pressure and improving the structural strength of the connecting terminal.

[0061] Figure 3 This is a side view of a connection terminal under pressure, provided for some embodiments of this application.

[0062] like Figures 1 to 3 As shown, in some alternative embodiments, the second support portion 42 is configured such that when the first support portion 41 is compressed, the end of the second support portion 42 away from the connecting portion 30 abuts against the second buffer portion 22.

[0063] When the first support portion 41 is subjected to pressure, the end of the second support portion 42 away from the connecting portion 30 gradually approaches the second buffer portion 22 until this end abuts against the second buffer portion 22, preventing the second support portion 42 from further deforming. At this point, the supporting force provided by the second support portion 42 can be used to counteract the pressure of the first buffer portion 21 on the first support portion 41, thereby providing stable support for the connecting terminal. Optionally, the end of the second support portion 42 away from the connecting portion 30 can be the connection point between the second support portion 42 and the first support portion 41. Alternatively, at least a portion of the structure of the end of the second support portion 42 away from the connecting portion 30 can be arranged parallel to the second buffer portion 22, so that at least a portion of the surface of the end of the second support portion 42 away from the connecting portion 30 can fit against the second buffer portion 22, thereby increasing the contact area between the second support portion 42 and the second buffer portion 22 and dispersing the load force.

[0064] like Figures 1 to 3 As shown, in some alternative embodiments, the second support portion 42 tends to approach the second buffer portion 22 in the direction from the connector portion 30 to the plug portion 10.

[0065] The second support portion 42 includes a first end and a second end. The first end is connected to the connecting portion 30, and the second end is used to connect to the first support portion 41. The orthographic projection on the connecting portion 30 shows that the second end is located between the first end and the second buffer portion 22.

[0066] In this embodiment, the second support portion 42 is tilted by the above-described configuration. When the pressure on the first support portion 41 is transmitted to the second support portion 42, the second support portion 42 will deform under the pressure, causing the second support portion 42 to rotate to a preset position, thereby providing support for the first buffer portion 21 and reducing the possibility that irreversible deformation of the first buffer portion 21 will reduce the reliability of the connection between the connection terminal and other components.

[0067] like Figures 1 to 3 As shown, in some alternative embodiments, the first support portion 41 is rotatably connected to the second support portion 42.

[0068] Optionally, the first support part 41 and the second support part 42 can be rotatably connected by hinges, bends, or other means.

[0069] Optionally, when the first support portion 41 is subjected to pressure from the first buffer portion 21, the first support portion 41 can rotate with the connection between the first support portion 41 and the second support portion 42 as the rotation base point, thereby dispersing part of the pressure of the first buffer portion 21, further increasing the pressure threshold that the connection terminal can withstand, and increasing the structural strength of the connection terminal.

[0070] like Figure 2 and Figure 3 As shown, in some alternative embodiments, the first support portion 41 includes a first surface S1 and a first end portion 411 and a second end portion 412 located opposite to the first surface S1 along a first direction X. The first buffer portion 21 is configured to deform when the connection terminal is pressed so that the first buffer portion 21 presses against at least a portion of the surface of the first surface S1 near the first end portion 411. The second support portion 42 is connected to the second end portion 412. The first direction X and the thickness direction of the first support portion 41 intersect.

[0071] The first support portion 41 includes a first surface S1 and a first end portion 411 and a second end portion 412 located opposite to each other along a first direction X on the first surface S1. The first surface S1 and the first buffer portion 21 are disposed opposite each other. The first direction X can be a direction parallel to the direction from the side of the first support portion 41 near the second buffer portion 22 to the side of the first support portion 41 away from the second buffer portion 22. The first end portion 411 can be the end of the first support portion 41 furthest from the second buffer portion 22, and the second end portion 412 can be the end of the first support portion 41 closest to the second buffer portion 22.

[0072] Optionally, when the connection terminal is pressed, the first buffer portion 21 deforms so that the first buffer portion 21 can press against a portion of the surface of the first surface S1 near the first end 411. Alternatively, the first buffer portion 21 presses against the entire surface of the first surface S1.

[0073] Optionally, the second support portion 42 and the second end portion 412 can be fixedly connected. Of course, they can also be rotatably connected.

[0074] The second support portion 42 is connected to the second end portion 412, so that when the first support portion 41 is subjected to pressure, the force transmitted from the first support portion 41 to the second support portion 42 can cause the second support portion 42 to rotate toward the second buffer portion 22. When the second support portion 42 and the second buffer portion 22 abut against each other, the second support portion 42 cannot deform further, so that the buffer portion 20 and the support portion 40 form a stable support structure, thereby improving the structural strength of the connection terminal.

[0075] Figure 4 This is a side view of another connection terminal provided in some embodiments of this application.

[0076] Figure 5 This is a side view of another connection terminal under pressure, provided in some embodiments of this application.

[0077] like Figure 4 and Figure 5 As shown, in some alternative embodiments, the second support portion 42 is configured to rotate relative to the connecting portion 30 when the first support portion 41 is pressed, so that the side of the second support portion 42 away from the connecting portion 30 is away from the second buffer portion 22.

[0078] When the first support portion 41 is subjected to pressure, the end of the second support portion 42 away from the connecting portion 30 gradually moves away from the second buffer portion 22, thereby increasing the distance between this end and the second buffer portion 22. Under the action of the surface friction force of the contact surfaces of the first support portion 41 and the first buffer portion 21, the pressure on the first support portion 41 is offset, thereby reducing the possibility of further deformation of the first buffer portion 21 and improving the structural strength of the connecting terminal.

[0079] like Figure 4 and Figure 5 As shown, in some alternative embodiments, the first support portion 41 includes a first surface S1 and a first end portion 411 and a second end portion 412 located opposite to the first surface S1 along a first direction X. The first buffer portion 21 is configured to deform when the connection terminal is pressed so that the first buffer portion 21 presses against at least a portion of the surface of the first surface S1 near the first end portion 411. The second support portion 42 is connected to the first end portion 411. The first direction X intersects with the thickness direction of the first support portion 41.

[0080] The same structure as the first support part 41 in the above embodiment will not be described again here. The main difference of the first support part 41 is described here.

[0081] Optionally, along the direction from the connector 30 to the plug 10, the second support portion 42 tends to be close to the first end portion 411, and the second support portion 42 is connected to the first end portion 411.

[0082] In this embodiment, the second support portion 42 is connected to the first end portion 411, so that when the first support portion 41 is subjected to pressure, the force transmitted from the first support portion 41 to the second support portion 42 can cause the second support portion 42 to rotate in a direction away from the second buffer portion 22. When the second support portion 42 rotates to a preset position, the second support portion 42 and the second buffer portion 22 jointly support the pressure of the first buffer portion 21 and the first support portion 41, thereby reducing the possibility of further deformation of the first buffer portion 21 and the first support portion 41.

[0083] like Figure 4 and Figure 5 As shown, in some alternative embodiments, the second support portion 42 tends to move away from the second buffer portion 22 in the direction from the connector portion 30 to the plug portion 10.

[0084] Continuing with the example of the two ends of the second support part 42 being the first end and the second end, the first end being connected to the connecting part 30 and the second end being used to connect to the first support part 41, the first end is located between the second end and the second buffer part 22 in the orthographic projection on the connecting part 30.

[0085] In this embodiment, when the first support portion 41 is subjected to pressure, the force transmitted from the first support portion 41 to the second support portion 42 will generate a component force away from the second support portion 42, so that the second support portion 42 can rotate with the connection point between the second support portion 42 and the connecting portion 30 as the rotation base point, further increasing the rotation component force of the second support portion 42, improving the dispersion of pressure of the second support portion 42 on the first support portion 41, and improving the structural strength of the connecting terminal.

[0086] Figure 6 This is a cross-sectional structural diagram of another connection terminal under pressure, provided for some embodiments of this application. Figure 7 for Figure 6 A magnified schematic diagram of P.

[0087] like Figures 4 to 7As shown, in some optional embodiments, the first support portion 41 is provided with a limiting groove 413, which is formed by a recess in the surface of the first support portion 41 facing the first buffer portion 21. The first buffer portion 21 is provided with a protrusion 212, which is formed by a protrusion in the surface of the first buffer portion 21 facing the first support portion 41. Wherein, the first support portion 41 is configured such that when the connecting terminal is pressed, at least a portion of the first support portion 41 abuts against at least a portion of the first buffer portion 21, and at least a portion of the protrusion 212 is located within the limiting groove 413.

[0088] Optionally, the limiting groove 413 may be recessed along the thickness direction of the first support portion 41 and extend along the first direction X.

[0089] Optionally, the extension length of the limiting groove 413 along the first direction X can be greater than or equal to the dimension of the protrusion 212 along the first direction X.

[0090] Optionally, the recessed depth of the limiting groove 413 can be the same as the protruding length of the protrusion 212, or they can be different.

[0091] Optionally, the number of limiting slots 413 may include one or more.

[0092] Alternatively, the number of protrusions 212 may include one or more.

[0093] As an example, a limiting groove 413 can be used to abut against one or more protrusions 212. Alternatively, each limiting groove 413 abuts against a protrusion 212.

[0094] When the connecting terminal is subjected to pressure, the first buffer portion 21 deforms, causing it to abut against the first support portion 41. The protrusion 212 on the first buffer portion 21 is embedded in the limiting groove 413. As the pressure on the connecting terminal increases, the protrusion 212 moves within the limiting groove 413. When the protrusion 212 abuts against the sidewall of the limiting groove 413 along the first direction X, the protrusion 212 can no longer move. At this point, the buffer portion 20 and the support portion 40 can no longer deform, thus providing support for the connecting terminal. During the movement of the protrusion 212, the second support portion 42 can also move. For example, the end of the second support portion 42 away from the connecting portion 30 can rotate in a direction away from the second buffer portion 22. Alternatively, in some other embodiments, when the end of the second support portion 42 away from the connecting portion 30 can rotate in a direction toward the second buffer portion 22, a limiting groove 413 can also be provided on the first support portion 41, and a protrusion 212 can be provided on the first buffer portion 21.

[0095] In these alternative embodiments, by providing the limiting groove 413 and the protrusion 212, the pressure threshold of the buffer portion 20 and the support portion 40 is increased, thereby improving the structural strength of the connecting terminal and reducing the possibility of damage to the connecting terminal when subjected to a large impact force, thereby improving the reliability of the connecting terminal.

[0096] In some alternative embodiments, at least one of the surface roughness of the first buffer portion 21 facing the first support portion 41 and the surface of the first support portion 41 facing the first buffer portion 21 is greater than or equal to 2 μm.

[0097] Optionally, the surface roughness of the surface of the first buffer portion 21 facing the first support portion 41 may be greater than or equal to 2 μm. Alternatively, the surface roughness of the surface of the first support portion 41 facing the first buffer portion 21 may be greater than or equal to 2 μm. Alternatively, both the surface roughness of the surface of the first buffer portion 21 facing the first support portion 41 and the surface roughness of the surface of the first support portion 41 facing the first buffer portion 21 may be greater than or equal to 2 μm. Optionally, the surface roughness of at least one of the surfaces of the first buffer portion 21 facing the first support portion 41 and the surface of the first support portion 41 facing the first buffer portion 21 may include 2 μm, 5 μm, 10 μm, 20 μm, 50 μm, or other values.

[0098] In these alternative embodiments, by increasing the surface roughness, the frictional resistance between the first support portion 41 and the first buffer portion 21 is increased, further offsetting the pressure on the connecting terminal, improving the structural strength of the connecting terminal, and improving the reliability of the connecting terminal.

[0099] like Figure 2 As shown, in some optional embodiments, the buffer portion 20 further includes a third buffer portion 23. The first buffer portion 21 is connected to the plug portion 10 through the third buffer portion 23. The first buffer portion 21 is located on the side of the third buffer portion 23 facing away from the plug portion 10. The angle between the first buffer portion 21 and the reference plane S2 is α, and the angle between the third buffer portion 23 and the reference plane S2 is β, where α < β. The reference plane S2 is parallel to the plane containing the connecting portion 30.

[0100] Optionally, the included angle between the first buffer section 21 and the reference plane S2 is α, where 45° < α ≤ 20°.

[0101] Optionally, the included angle between the third buffer section 23 and the reference plane S2 is β, where 45°≤β≤80°.

[0102] Optionally, the included angle between the second buffer section 22 and the reference plane S2 is γ, where 80°≤γ≤90°.

[0103] Optionally, the third buffer section 23 and the first buffer section 21 can be an integral structure.

[0104] In these alternative embodiments, when the connecting terminal is subjected to pressure perpendicular to the reference plane S2, and the pressure is transmitted to the buffer portion 20 through the plug portion 10, the rotational force on the first buffer portion 21 is greater than that on the third buffer portion 23 because the angle between the first buffer portion 21 and the reference plane S2 is smaller than that between the third buffer portion 23 and the reference plane S2. This causes the first buffer portion 21 to rotate before the third buffer portion 23. When the second support portion 42 supports the first buffer portion 21, the first buffer portion 21 can stop rotating. At this time, if the pressure on the connecting terminal is increased, the third buffer portion 23 can be deformed. For example, the third buffer portion 23 can rotate around the connection point between the third buffer portion 23 and the first buffer portion 21 as the rotation base point, thereby offsetting the force on the connecting terminal and further increasing the structural strength and reliability of the connecting terminal.

[0105] like Figure 1 As shown, in some alternative embodiments, the connection terminal is a plate-shaped structure.

[0106] Optionally, the connecting terminal can be an integral structure, and the buffer part 20, the connecting part 30, and the supporting part 40 can be formed by the direction of bending.

[0107] Optionally, the first buffer section 21, the second buffer section 22, and the third buffer section 23 in the buffer section 20 can be formed by bending with a bending shaft.

[0108] Alternatively, the connecting part 30 can also be formed by bending using a bending shaft.

[0109] Alternatively, the support portion 40 can also be formed by bending using a bending shaft.

[0110] This application embodiment reduces the manufacturing difficulty and cost of the connecting terminals by setting them as plate-like structures, which is beneficial for mass production.

[0111] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A connection terminal for a power module, characterized in that, include: Plug section; A buffer section is connected to the plug section. The buffer section includes a first buffer section and a second buffer section connected to each other. The first buffer section is located between the plug section and the second buffer section. The connecting part is located on the side of the second buffer part that faces away from the first buffer part; A support portion is connected to the connecting portion. The support portion includes a first support portion and a second support portion connected to each other. At least a portion of the surface of the first support portion is disposed opposite to the first buffer portion, and the first support portion is located on the side of the first buffer portion away from the plug portion. At least a portion of the second buffer portion is arranged side by side with the second support portion. Wherein, the first buffer portion is configured such that when the connecting terminal is pressed, the first buffer portion deforms toward the first support portion to press against the first support portion; the second support portion is configured such that when the first support portion is pressed, the second support portion rotates relative to the connecting portion to support the first buffer portion. The second support is configured such that when the first support is compressed, the end of the second support away from the connecting part abuts against the second buffer part.

2. The connection terminal according to claim 1, characterized in that, Along the direction from the connecting portion to the plug portion, the second support portion tends to move closer to the second buffer portion.

3. The connecting terminal according to claim 2, characterized in that, The first support portion is rotatably connected to the second support portion.

4. The connecting terminal according to claim 2, characterized in that, The first support portion includes a first surface and a first end and a second end located opposite to each other along a first direction on the first surface. The first buffer portion is configured to deform when the connecting terminal is pressed, so that the first buffer portion presses against at least a portion of the surface of the first surface near the first end. The second support portion is connected to the second end. The first direction intersects the thickness direction of the first support portion.

5. The connection terminal according to claim 1, characterized in that, The surface roughness of at least one of the surface of the first buffer portion facing the first support portion and the surface of the first support portion facing the first buffer portion is greater than or equal to 2 μm.

6. The connecting terminal according to claim 1, characterized in that, The buffer section further includes a third buffer section, and the first buffer section is connected to the plug section through the third buffer section. The first buffer section is located on the side of the third buffer section facing away from the plug section. The angle between the first buffer section and the reference surface is α, and the angle between the third buffer section and the reference surface is β, where α < β. The reference surface is parallel to the plane where the connecting section is located.

7. A connection terminal for a power module, characterized in that, include: Plug section; A buffer section is connected to the plug section. The buffer section includes a first buffer section and a second buffer section connected to each other. The first buffer section is located between the plug section and the second buffer section. The connecting part is located on the side of the second buffer part that faces away from the first buffer part; A support portion is connected to the connecting portion. The support portion includes a first support portion and a second support portion connected to each other. At least a portion of the surface of the first support portion is disposed opposite to the first buffer portion, and the first support portion is located on the side of the first buffer portion away from the plug portion. At least a portion of the second buffer portion is arranged side by side with the second support portion. Wherein, the first buffer portion is configured such that when the connecting terminal is pressed, the first buffer portion deforms toward the first support portion to press against the first support portion; the second support portion is configured such that when the first support portion is pressed, the second support portion rotates relative to the connecting portion to support the first buffer portion. The second support is configured such that when the first support is compressed, the second support rotates relative to the connecting portion so that the side of the second support away from the connecting portion moves away from the second buffer portion; Along the direction from the connecting portion to the plug portion, the second support portion tends to move away from the second buffer portion.

8. The connecting terminal according to claim 7, characterized in that, The first support portion includes a first surface and a first end and a second end located opposite to the first surface along a first direction. The first buffer portion is configured to deform when the connection terminal is pressed, so that the first buffer portion presses against at least a portion of the first surface near the first end. The second support portion is connected to the first end. The first direction intersects the thickness direction of the first support portion.

9. The connecting terminal according to claim 7, characterized in that, The first support portion is provided with a limiting groove, which is formed by a recess in the side surface of the first support portion facing the first buffer portion; The first buffer portion has a protrusion, which is formed by the first buffer portion protruding from one side surface toward the first support portion; Wherein, the first support portion is configured such that when the connecting terminal is pressed, at least a portion of the first support portion abuts against at least a portion of the first buffer portion, and at least a portion of the protrusion is located within the limiting groove.

10. The connecting terminal according to claim 7, characterized in that, The surface roughness of at least one of the surface of the first buffer portion facing the first support portion and the surface of the first support portion facing the first buffer portion is greater than or equal to 2 μm.

11. The connecting terminal according to claim 7, characterized in that, The buffer section further includes a third buffer section, and the first buffer section is connected to the plug section through the third buffer section. The first buffer section is located on the side of the third buffer section facing away from the plug section. The angle between the first buffer section and the reference surface is α, and the angle between the third buffer section and the reference surface is β, where α < β. The reference surface is parallel to the plane where the connecting section is located.

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