A connection terminal for a power module

Abstract

The present invention discloses a connection terminal of a power module, belonging to the technical field of connection terminals of power modules. The present invention comprises: a first support portion, the first support portion comprises a plug portion, a transition portion, and a support foot arranged in sequence from top to bottom; and a second support portion, the second support portion is located on one side of the first support portion, and one end of the second support portion is connected to the transition portion, the other end of the second support portion is constructed as a connection portion and is located below the support foot, and there is a gap between the connection portion and the support foot. The connection terminal enhances the structural strength of the connection terminal by forming a structure similar to an H-shaped special-shaped rod member through two staggered rod members, thereby increasing the service life of the connection terminal.

Description

Technical Field

[0001] The invention belongs to the technical field of connecting terminals of power modules, and in particular relates to a connecting terminal of a power module. Background Art

[0002] One end of the existing connection terminal is used to connect the DBC ceramic circuit or the PCB board, and the other end is connected to the PCB board. It is used to connect the corresponding components during the use of the power module and buffer the impact on the power module.

[0003] The inventor of the present disclosure found that there are at least the following problems in the prior art during the process of implementing the technical solution of the present disclosure: the existing connection terminals are all plug parts, buffer parts and connection parts arranged in sequence along the same direction, wherein the buffer part includes a plurality of buffer structures arranged in sequence and in parallel along the width direction of the connection terminal. Therefore, the structure of the existing connection segment can still be regarded as a single supporting rod, which is relatively thin and has an unsatisfactory service life under the extreme condition of high strength. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, an embodiment of the present disclosure provides a connection terminal of a power module, which enhances the structural strength of the connection terminal by forming an H-shaped special-shaped rod structure similar to two staggered rods, thereby increasing the service life of the connection terminal.

[0005] In order to achieve the above objectives, the technical solutions adopted by the embodiments of the present disclosure are as follows:

[0006] In a first aspect, an embodiment of the present disclosure provides a connection terminal of a power module, including:

[0007] A first supporting portion, the first supporting portion comprising a plug portion, a transition portion, and a supporting foot arranged in sequence from top to bottom; and

[0008] The second support portion is located on one side of the first support portion, and one end of the second support portion is connected to the transition portion, the other end of the second support portion is constructed as a connecting portion and is located below the supporting foot, and there is a gap between the connecting portion and the supporting foot.

[0009] Optionally, the second supporting portion includes:

[0010] A bent connecting portion, one end of which is fixedly connected to the left side wall or the right side wall of the transition portion;

[0011] A swing arm portion, one side of the top end of the swing arm portion is connected to the other end of the bent connection portion;

[0012] Wherein, the bottom end of the swing arm portion extends toward the first supporting portion to form the connecting portion.

[0013] Optionally, the first supporting portion and the swing arm portion are arranged parallel to each other.

[0014] Optionally, the swing arm portion includes at least one bent buffer section.

[0015] Optionally, each bending buffer section includes at least one first opening and at least one second opening along the vertical direction, and the first opening is arranged on the left side wall of the swing arm portion, and the second opening is arranged on the right side wall of the swing arm portion;

[0016] Wherein, the first opening and the second opening are arranged alternately.

[0017] Optionally, the transition portion includes a protruding portion, and both side walls of the protruding portion protrude from both side walls of the supporting foot and the plug portion;

[0018] Wherein, the protruding portion is provided with an open hole buffer structure, and the open hole buffer structure comprises:

[0019] A buffer hole, wherein the buffer hole passes through the protruding portion, and the width of the buffer hole is greater than the width of the supporting foot;

[0020] an upper protrusion, wherein the upper protrusion is configured to be formed by extending the top wall of the buffer hole downward; and

[0021] A lower protrusion, wherein the lower protrusion is configured to be formed by extending the bottom wall of the buffer hole upward;

[0022] Wherein, the upper protrusion and the lower protrusion are arranged opposite to each other.

[0023] Optionally, the buffer hole is an elliptical hole, and the major axis of the elliptical hole is arranged horizontally.

[0024] Optionally, also include:

[0025] a first stopper, the first stopper being fixedly disposed on the top wall of the connecting portion;

[0026] Wherein, the bottom end of the supporting foot is located between the first stopper and the swing arm part.

[0027] Optionally, also include:

[0028] A second stopper, the second stopper being fixedly disposed on a top wall of the swing arm portion or the connecting portion;

[0029] Wherein, the bottom end of the supporting foot is located between the first stopper and the second stopper.

[0030] Optionally, the first supporting portion has a first surface close to the second supporting portion and a second surface facing away from the first surface, and a lower portion of the first surface is concave toward the second surface to form a step;

[0031] Wherein, the top end of the swing arm portion faces the step.

[0032] Compared with the prior art, the embodiment of the present disclosure provides a connection terminal of a power module, which includes a first support portion and a second support portion that are staggered and connected to each other. The plug portion connected to the PCB board is located on the first support portion, and the connection portion connected to the DCB or PCB board is located on the second support portion. That is, compared with the existing connection terminal with a single rod structure, the embodiment of the present disclosure adopts a special-shaped rod structure similar to an H-shape to enhance the structural strength and yield strength of the connection terminal, improve the mechanical support force of the connection terminal, and thus improve the service life of the connection terminal.

[0033] With reference to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents.

[0034] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0035] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 is a schematic structural diagram of an embodiment of the present disclosure;

[0038] Figure 2 is an enlarged schematic diagram of a second stopper of an embodiment of the present disclosure;

[0039] Figure 3is a structural schematic diagram of another embodiment of the present disclosure;

[0040] Figure 4 is a schematic diagram of the position of the central axis of yet another embodiment of the present disclosure;

[0041] Figure 5 It is a schematic diagram of a buffer hole structure in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0045] The connection terminal of the existing power module generally includes a plug part, a transition part, a buffer part and a connection part arranged in sequence from top to bottom. Among them, in order to improve the structural strength or yield strength of the connection terminal, the improvement route of the buffer structure of the existing connection terminal is to improve the single buffer structure into a plurality of support legs or bending structures arranged in parallel and spaced along the width direction of the buffer part. That is, the existing connection terminal can still be regarded as a single rod. Under extreme conditions, the structural strength of a single rod support is limited, resulting in insufficient support force and easy deformation.

[0046] In order to further enhance the structural strength of the existing connection terminal, an embodiment of the present disclosure provides a connection terminal for a power module, which includes a first support portion and a second support portion that are staggered and connected to each other. The plug portion connected to the PCB board is located on the first support portion, and the connection portion connected to the DCB or PCB board is located on the second support portion. That is, compared with the existing connection terminal in the form of a rod, the embodiment of the present disclosure adopts a special structure similar to an H-shape to enhance the structural strength and yield strength of the connection terminal, improve the mechanical support force of the connection terminal, and thus improve the service life of the connection terminal.

[0047] The inventive concept of the present disclosure is further described below in conjunction with some preferred embodiments.

[0048] A connection terminal of a power module is used for connecting an ICBT circuit of the power module with other circuits, and comprises a first supporting part and a second supporting part.

[0049] The first support portion includes a plug portion 1, a transition portion 2, and a support foot 6 which are sequentially arranged from top to bottom. That is, the top end of the first support portion is connected to the PCB board in a plug-in manner through the plug portion 1.

[0050] Specifically, the plug portion 1 includes a fisheye plug-in portion, and the fisheye plug-in portion includes an elliptical fisheye hole 11. The plug portion 1 does not involve the key points of the present disclosure, and those skilled in the art know how to implement it, which will not be repeated here. The lower section of the first support portion is the support foot 6. The connecting transition portion between the support foot 6 and the plug portion 1 is the transition portion 2. Generally, the width of the support foot 6 is equal to the width of the transition portion 2.

[0051] The second supporting portion is located at one side of the first supporting portion, and one end of the second supporting portion is connected to the transition portion 2, and the other end of the second supporting portion is configured as a connecting portion 3 and is located below the supporting foot 6. Figure 2 , wherein the bottom end surface of the supporting foot is the supporting mating surface 4 , and there is a transverse gap 5 between the supporting mating surface 4 and the connecting portion 3 .

[0052] At the same time, there is also a vertical gap between the first support portion and the second support portion, that is, the first support portion and the second support portion can form a special-shaped rod similar to an H shape. At the same time, the bottom end of the second support portion is bent toward one side of the first support portion and extends to form the connecting portion 3. The connecting portion 3 is welded to the DCB or PCB board or connected using other technologies known in the art. The bottom end surface of the connecting portion is the connecting working surface 10.

[0053] Therefore, when the connection terminal provided in this embodiment is in use, when the PCB board is pressed into the terminal, the plug part 1, the transition part 2 and the second support part yield and deform as a whole. At the same time, the support foot 6 at the lower part of the first support part is close to the connection part 3, thereby reducing the pressure on the second support part, and finally achieving the technical effect of enhancing the structural strength and yield strength of the connection terminal, thereby improving the supporting force of the connection terminal, and further improving the service life of the connection terminal. Compared with the existing single rod-shaped connection terminal, the special-shaped connection terminal of this embodiment reasonably disperses the transmitted pressure when in use, thereby better playing the role of support and connection.

[0054] Compared with the technical route of improving the buffer structure in a single rod, which is often used in the prior art when faced with the technical problem of how to improve the yield resistance or structural strength, this embodiment provides another reliable technical option or technical route.

[0055] Meanwhile, those skilled in the art should understand that the connection between the first support portion and the second support portion can be fixedly connected by welding or bonding or other equivalent means known in the art. Alternatively, the two can be detachably connected by threaded connection or clamping or other equivalent means known in the art and firmly connected during use, that is, the two can be integrally formed or assembled from at least two parts.

[0056] In some embodiments, the connection portion between the first support portion and the second support portion may be further improved. Figure 1 The second supporting portion includes a bending connecting portion 12, a swing arm portion 13 and a connecting portion 3 which are connected in sequence.

[0057] One end of the bent connection portion 12 is fixedly connected to the left side wall or the right side wall of the transition portion 2. The left side wall or the right side wall here refers to any side wall along the width direction of the transition portion 2. One side of the top end of the swing arm portion 13 is connected to the other end of the bent connection portion 12.

[0058] The swing arm portion 13 is the main body of the second support portion, and its width can be equal to the width of the first support portion. The width of the first support portion is the width of the aforementioned support foot 6 or transition portion 2. The bottom end of the swing arm portion 13 extends toward the first support portion to form the connecting portion 3.

[0059] See also Figure 1 The swing arm portion 13 can be arranged in a vertical direction, and the connecting portion 3 can be arranged horizontally, and the two form an L-shaped member. That is, the first supporting portion and the swing arm portion 13 are arranged parallel to each other.

[0060] Specifically, in order to improve the force of the connection terminal when in use, it is prevented that the second support part is bent directly after being stressed, so that the support foot 6 at the bottom of the first support part directly touches the connection part 3, and a rigid connection is directly formed. In this embodiment, the first support part and the second support part are connected by a bent connection part 12. Figure 1 The bent connecting portion 12 is constructed as a horizontally placed U-shaped structure, with the end of one arm connected to a side wall in the width direction of the transition portion 2, and the end of the other arm connected to the side wall of the end of the swing arm portion 13. Preferably, the overall height of the bent connecting portion 13 is equal to the width of the swing arm portion 13.

[0061] When the connection terminal provided by this embodiment is in use, after the PCB board is pressed into the terminal, the plug part 1 and the transition part 2 transfer the pressure received to the bent connection part 12, so that the two arms of the bent connection part 12 are opened to a certain extent, and then the bent connection part 12 drives the second support part to yield and deform. Until the support foot 6 approaches the connection part 3, the pressure received by the bent connection part 12 is reduced. The setting of the bent connection part 12 improves the elastic deformation recovery ability of the connection terminal, enhances the overall yield strength, and thus improves the service life of the connection terminal.

[0062] In some embodiments, the swing arm portion 13 includes at least one bent buffer section 7. That is, in the connection terminal provided in this embodiment, the first support portion mainly plays a supporting role, while the second support portion plays a buffering role. The two cooperate to ensure the structural strength and yield strength of the connection terminal.

[0063] The plurality of bending buffer sections 7 may be arranged sequentially from top to bottom, or may be arranged in parallel from left to right, which is not limited here.

[0064] Specifically, as an option of the present disclosure, each bending buffer section 7 includes at least one first opening and at least one second opening along the vertical direction, and the first opening is arranged on the left side wall of the swing arm portion, and the second opening is arranged on the right side wall of the swing arm portion. The first opening and the second opening are arranged alternately.

[0065] See also Figure 1 , when both the first opening and the second opening are one, the bending buffer section 7 includes two openings staggered up and down, and the two openings are respectively arranged on both sides of the swing arm portion 13 in the width direction. That is, the V-shaped opening is arranged on the left side wall or the right side wall of the swing arm portion 13. That is, the bending buffer section 7 is formed by the swing arm portion 13 through material reduction processing, and it constitutes a Z-type buffer structure. It is easy to understand that the opening can also be set to a semicircular shape, that is, the bending buffer section 7 can also be constructed as an S-shaped bending structure. The opening can also adopt other shapes known in the art.

[0066] It is easy to understand that the uppermost opening of the bending buffer section 7 is not limited to the first opening on the left wall or the second opening on the right wall.

[0067] Compared with the existing S-shaped or zigzag-line buffer structures in which the front and rear sides of the bent parts protrude from the connecting terminal body, the bent buffer section 7 in the connecting terminal provided in this embodiment does not change the overall thickness of the swing arm portion 13, thereby not affecting the setting of the gap between the second support portion and the first support portion, and further does not affect the deformation and recovery of the two when subjected to force.

[0068] In the above-mentioned embodiments, the buffer structure is disposed on the second support portion. In other embodiments, the buffer structure may also be disposed on the first support portion. Figure 4 , Figure 5 In some embodiments, the transition section 2 includes a protrusion 17, and both side walls of the protrusion 17 protrude from both side walls of the supporting foot. That is, the width of the protrusion 17 is wider than the width of the rest of the transition section 2. That is, the transition section 2 is constructed as a cross structure.

[0069] The protruding portion 17 is provided with an open hole buffer structure, and the open hole buffer structure includes: a buffer hole 15 , an upper protrusion 14 and a lower protrusion 16 .

[0070] Specifically, the buffer hole 15 penetrates the protrusion 17 along the thickness direction of the transition part 2, and the width of the buffer hole 15 is greater than the width of the transition part 2. That is, after the plug part PCB is connected, when the PCB presses down the plug part, the weak part of the protrusion 17 cut by the buffer hole 15 will produce elastic deformation.

[0071] See also Figure 5 After the protrusion 17 is cut by the buffer hole 15, six weak points are generated, namely vertical weak points a1, a3, a4 and a5, and transverse weak points a2 and a5.

[0072] At the same time, in order to limit the elastic deformation of the protrusion 17 and avoid damage to the buffer hole 15, an upper protrusion 14 and a lower protrusion 17 are arranged opposite to each other in the buffer hole 15. The upper protrusion 14 is constructed as a downward extension of the top wall of the buffer hole 15, and the lower protrusion is constructed as an upward extension of the bottom wall of the buffer hole 15. That is, after the protrusion 17 is deformed to a certain extent under pressure, the upper protrusion 14 and the lower protrusion 16 contact each other to provide a relatively strong supporting force, reduce the pressure on the weak part of the protrusion 17, and then provide reliable mechanical support for the power module. Preferably, the upper protrusion 14 and the lower protrusion 16 are arranged opposite to each other.

[0073] It is easy to understand that the aforementioned upper protrusion 14 and lower protrusion 16 can be integrally formed with the protrusion 17, or can be fixed to the top wall or bottom wall of the buffer hole using rivets or pins or other structures known in the art, which are not limited here.

[0074] Better, see Figure 3 , Figure 4 The buffer hole 15 is an elliptical hole, and the long axis of the elliptical hole 15 is arranged horizontally.

[0075] At the same time, the inventor of the present disclosure also noticed that the connection working surface 10 of the connection portion 3 of the connection terminal is not an absolute plane. In actual use, when the force reaches a certain level, the connection terminal will inevitably be affected by the connection working surface 10 and tilt to one side, and finally collapse in an undirected manner. Therefore, the connection terminal in this embodiment also includes a first stopper 8, which is fixedly arranged on the top wall of the connection portion 3. The bottom end of the support foot 6 is located between the first stopper 8 and the swing arm portion 13.

[0076] That is, in this embodiment, a space is defined between the first stopper 8 and the swing arm portion 13 for the support foot 6 to move forward and backward.

[0077] See also Figure 1 and Figure 3 , with the width direction of the first support part as the left-right direction, the direction in which the first support part extends away from the second support part as the front, and the direction in which the first support part extends toward the second support part as the rear. Due to the width limitation of the support foot 3, when the support foot 3 tilts left or right, the support foot 3 will be connected to the top surface of the connecting part 3 and be restricted, thereby preventing it from collapsing. In this embodiment, the first stopper 8 is a front stopper, and the swing arm part 13 can be regarded as a rear stopper, thereby limiting the forward and backward movement range of the support foot 6, preventing the support foot 6 from collapsing when the force is too large.

[0078] As an option of the present disclosure, since the gap between the swing arm portion 13 and the support foot 6 is larger than the front-to-back displacement of the support foot 6, in order to better limit the rearward displacement of the support foot 6, the connection terminal further includes a second stopper 9, which is fixedly disposed on the side wall of the swing arm portion 13 or the top wall of the connection portion 3. The bottom end of the support foot 6 is located between the first stopper 8 and the second stopper 9.

[0079] The first stopper and the second stopper may be integrally formed with the connecting portion or the swing arm portion, see Figure 1 , or it may be a rivet fixedly connected to the connecting portion 3 or the swing arm portion 13 or other techniques known in the art.

[0080] In some embodiments, the first support portion has a first surface close to the second support portion and a second surface facing away from the first surface, and the lower portion of the first surface is concave toward the second surface to form a step;

[0081] Wherein, the top end of the swing arm portion faces the step.

[0082] If the thickness of the plug part, the support plate and the swing arm part are all the same, there will be an obvious horizontal distance between the central axis of the fisheye hole 11 in the vertical direction and the central axis of the connecting part 3, and then after the PCB board is pressed into the plug part 1, a torque will be obviously generated on the connecting part 3. That is, when the connecting terminal is in use, from the front to the back direction, it is necessary to ensure that the central axis of the fisheye hole 11 in the vertical direction of the plug part 1 coincides with the central axis of the connecting part 3 as much as possible, so that the force on the connecting terminal is a straight line without generating or generating a small bending moment.

[0083] See also Figure 4 Therefore, in this embodiment, a step is designed at the transition portion 2 of the first support portion, and the step makes the thickness of the support foot 6 smaller than the thickness of the plug portion 1. The second support portion is arranged in the space vacated by the step. Thus, the central axis of the fisheye hole 11 of the plug portion 1 is ensured to be collinear with the central axis of the connecting portion 3 during the design and production stage. Thus, the force of the connecting terminal during use is improved.

[0084] Any numerical value cited herein includes all values ​​of lower and upper values ​​that increase by one unit from the lower limit to the upper limit, and there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the quantity of a component or a process variable (such as temperature, pressure, time, etc.) is stated to be from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be clearly expressed, and it can be considered that all possible combinations of numerical values ​​listed between the lowest value and the highest value are clearly stated in this specification in a similar manner.

[0085] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0086] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." to describe a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, parts or steps herein also contemplates embodiments that consist essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to indicate that any attribute described that "may" include is optional.

[0087] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0088] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by such claims. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A connection terminal of a power module, characterized in that: include: A first supporting portion, the first supporting portion comprising a plug portion, a transition portion, and a supporting foot arranged in sequence from top to bottom; as well as A second supporting portion, wherein the second supporting portion is located at one side of the first supporting portion, one end of the second supporting portion is connected to the transition portion, the other end of the second supporting portion is configured as a connecting portion and is located below the supporting foot, and there is a gap between the connecting portion and the supporting foot; The second supporting portion comprises: A bent connecting portion, one end of which is fixedly connected to the left side wall or the right side wall of the transition portion; A swing arm portion, one side of the top end of the swing arm portion is connected to the other end of the bent connection portion; Wherein, the bottom end of the swing arm portion extends toward the first support portion to form the connecting portion; The first support portion and the swing arm portion are arranged parallel to each other; Also includes: a first stopper, the first stopper being fixedly disposed on the top wall of the connecting portion; Wherein, the bottom end of the supporting foot is located between the first stopper and the swing arm part.

2. The connection terminal of the power module according to claim 1, characterized in that: The swing arm portion includes at least one bent buffer section.

3. The connection terminal of the power module according to claim 2, characterized in that: Each bending buffer section includes at least one first opening and at least one second opening along the vertical direction, and the first opening is arranged on the left side wall of the swing arm portion, and the second opening is arranged on the right side wall of the swing arm portion; Wherein, the first opening and the second opening are arranged alternately.

4. The connection terminal of the power module according to claim 1, characterized in that: The transition portion includes a protruding portion, and both side walls of the protruding portion protrude from both side walls of the supporting foot and the plug portion; Wherein, the protruding portion is provided with an open hole buffer structure, and the open hole buffer structure comprises: A buffer hole, wherein the buffer hole passes through the protruding portion, and the width of the buffer hole is greater than the width of the supporting foot; an upper protrusion, wherein the upper protrusion is configured to be formed by extending the top wall of the buffer hole downward; and A lower protrusion, wherein the lower protrusion is configured to be formed by extending the bottom wall of the buffer hole upward; Wherein, the upper protrusion and the lower protrusion are arranged opposite to each other.

5. The connection terminal of the power module according to claim 4, characterized in that: The buffer hole is an elliptical hole, and the major axis of the elliptical hole is arranged horizontally.

6. The connection terminal of the power module according to claim 5, characterized in that: Also includes: A second stopper, the second stopper being fixedly disposed on a top wall of the swing arm portion or the connecting portion; Wherein, the bottom end of the supporting foot is located between the first stopper and the second stopper.

7. The connection terminal of the power module according to claim 6, characterized in that: The first supporting portion has a first surface close to the second supporting portion and a second surface facing away from the first surface, and the lower portion of the first surface is concave toward the second surface to form a step; Wherein, the top end of the swing arm portion faces the step.

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