CN117715335A

CN117715335A - Power converter and electronic component

Info

Publication number: CN117715335A
Application number: CN202311625538.7A
Authority: CN
Inventors: 李鑫; 於波; 张柳玲子; 史明硕
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2023-11-28
Filing date: 2023-11-28
Publication date: 2024-03-15

Abstract

The embodiment of the application provides a power converter and an electronic component. The power converter comprises a shell, a circuit board and a power module, wherein the circuit board and the power module are both positioned in the shell; the power module comprises a substrate, a power device and a crimping terminal, wherein the power device is arranged on the substrate; the crimping terminal comprises a plugging part and a root part, wherein the plugging part, the root part and the substrate are sequentially arranged along a first direction, the plugging part is plugged with the circuit board, and the root part is electrically connected with the substrate; the root part comprises a first elastic part and a second elastic part, the first elastic part and the second elastic part are arranged along a second direction perpendicular to the first direction, the first elastic part and the second elastic part are respectively bent towards each other to form a bulge, and the bulge of the first elastic part and the bulge of the second elastic part are arranged in opposite directions and are not contacted; the first elastic part and the second elastic part are used for generating elastic deformation when being pressed, and the bulge of the first elastic part is contacted with the bulge of the second elastic part. The scheme of the embodiment of the application can simplify the structure of the crimping terminal.

Description

Power converter and electronic component

Technical Field

The present application relates to the field of power electronics, and in particular, to a power converter and an electronic component.

Background

The power module with the crimp terminal can be pressed into the circuit board at one time by the crimping process. The installation mode is simpler and has higher efficiency. To achieve crimping, the crimp terminal needs to be provided with a support structure and a buffer structure. The structure of the conventional crimping terminal is complex, so that the production process is complex, the process stability is poor, the dimensional accuracy deviation of the crimping terminal is easy to cause, the supporting structure and the buffer structure cannot play a due role, and finally the crimping failure of the power module is caused.

Disclosure of Invention

The embodiment of the application provides a power converter and an electronic component, which can simplify the structure of a crimping terminal, are favorable for simplifying the production process, improve the process stability, improve the dimensional accuracy of the crimping terminal and further ensure the reliability of the crimping process.

In a first aspect, an embodiment of the present application provides a power converter, including a housing, a circuit board, and a power module, where the circuit board and the power module are both located in the housing; the power module comprises a substrate, a power device and a crimping terminal, wherein the power device is arranged on the substrate; the crimping terminal comprises a plugging part and a root part, wherein the plugging part, the root part and the substrate are sequentially arranged along a first direction, the plugging part is plugged with the circuit board, and the root part is electrically connected with the substrate; the root part comprises a first elastic part and a second elastic part, the first elastic part and the second elastic part are arranged along a second direction perpendicular to the first direction, the first elastic part and the second elastic part are bent towards each other and form bulges, and the bulges of the first elastic part and the bulges of the second elastic part are arranged in opposite directions and are not contacted; in the process of crimping the plug-in part to the circuit board, the first elastic part and the second elastic part are used for generating elastic deformation when being stressed, and the bulge of the first elastic part is contacted with the bulge of the second elastic part.

In this scheme, through first elastic part and second elastic part at the same position design of crimping terminal, at crimping terminal crimping to the in-process of circuit board, first elastic part and second elastic part can realize buffering absorption effect and supporting role simultaneously. The scheme is simple in structural design, convenient to manufacture through a simple process, low in process complexity, capable of guaranteeing process stability and process precision, further guaranteeing product size precision and finally guaranteeing reliability of a crimping process.

In one implementation manner of the first aspect, the first elastic portion and the second elastic portion are symmetrical about a first axis, and the first axis extends along the first direction. The first elastic part and the second elastic part are made to be symmetrical, so that the structure of the crimping terminal is stable and reliable, the manufacturing process can be simplified, and the manufacturing precision is ensured.

In one implementation of the first aspect, the first elastic portion is symmetrical about a second axis, the second axis extending in the second direction. By making at least one of the first elastic portion and the second elastic portion symmetrical, the structure of the crimp terminal can be made stable and reliable, the manufacturing process can be simplified, and the manufacturing accuracy can be ensured.

In one implementation of the first aspect, the first elastic portion has a smooth curve shape. By providing the first elastic portion and/or the second elastic portion with a smooth curve shape, the structure of the crimp terminal can be made simple, stable and reliable, and the first elastic portion and the second elastic portion can be accurately and quickly switched from the buffer state to the support state at the time of crimping.

In one implementation manner of the first aspect, the first elastic portion includes two straight portions, and the two straight portions form an included angle, and the included angle forms a protrusion of the first elastic portion. By providing the first elastic portion and/or the second elastic portion with the fold line shape, the structure of the crimp terminal can be made simple, stable and reliable, and the first elastic portion and the second elastic portion can be accurately and quickly switched from the buffer state to the support state at the time of crimping.

In an implementation manner of the first aspect, the protrusion of the first elastic portion and the protrusion of the second elastic portion are both one. Through making first elastic part and second elastic part all have a arch for the simple structure of first elastic part and second elastic part is reliable, can satisfy the design demand of buffering and support simultaneously.

In an implementation manner of the first aspect, the root portion further includes a base, the base is located at one end of the first elastic portion opposite to the plug portion, and the base is connected with the first elastic portion and the second elastic portion, and forms a bending angle with the first elastic portion and the second elastic portion; the base is electrically connected with the substrate. By designing the base, reliable electrical connection of the crimp terminal and the substrate can be achieved.

In a second aspect, embodiments of the present application provide an electronic component including a package and a crimp terminal; the crimping terminal comprises a splicing part and a buffer supporting part, wherein the splicing part and the buffer supporting part are arranged along a first direction; the buffer supporting part comprises a first elastic part and a second elastic part, the first elastic part and the second elastic part are arranged along a second direction perpendicular to the first direction, the first elastic part and the second elastic part are bent towards each other to form bulges, and the bulges of the first elastic part are arranged opposite to the bulges of the second elastic part and are not contacted with each other; the buffer supporting part is positioned in the packaging body, and the plug-in part is exposed outside the packaging body; the plug-in part is used for being pressed and connected to the circuit board, and the first elastic part and the second elastic part are used for generating elastic deformation and enabling the bulge of the first elastic part to be in contact with the bulge of the second elastic part.

In one implementation manner of the second aspect, the first elastic portion and the second elastic portion are symmetrical about a first axis, and the first axis extends along the first direction. The first elastic part and the second elastic part are made to be symmetrical, so that the structure of the crimping terminal is stable and reliable, the manufacturing process can be simplified, and the manufacturing precision is ensured.

In one implementation of the second aspect, the first elastic portion is symmetrical about a second axis, the second axis extending in the second direction. By making at least one of the first elastic portion and the second elastic portion symmetrical, the structure of the crimp terminal can be made stable and reliable, the manufacturing process can be simplified, and the manufacturing accuracy can be ensured.

In one implementation manner of the second aspect, the first elastic portion has a smooth curve shape. By providing the first elastic portion and/or the second elastic portion with a smooth curve shape, the structure of the crimp terminal can be made simple, stable and reliable, and the first elastic portion and the second elastic portion can be accurately and quickly switched from the buffer state to the support state at the time of crimping.

In one implementation manner of the second aspect, the first elastic portion includes two straight portions, and the two straight portions form an included angle, and the included angle forms a protrusion of the first elastic portion. By providing the first elastic portion and/or the second elastic portion with the fold line shape, the structure of the crimp terminal can be made simple, stable and reliable, and the first elastic portion and the second elastic portion can be accurately and quickly switched from the buffer state to the support state at the time of crimping.

In an implementation manner of the second aspect, the protrusions of the first elastic portion and the second elastic portion are one. Through making first elastic part and second elastic part all have a arch for the simple structure of first elastic part and second elastic part is reliable, can satisfy the design demand of buffering and support simultaneously.

In one implementation manner of the second aspect, the electronic component is a power module, the power module further includes a substrate and a power device, the substrate and the power device are both located in the package, and the power device is disposed on the substrate; the crimping terminal further comprises a base, wherein the base is positioned in the package body and positioned at one end of the buffer supporting part, which is opposite to the plug-in part, and the base is connected with the first elastic part and the second elastic part and forms a bending angle with the first elastic part and the second elastic part; the base is electrically connected with the substrate. For the power module, reliable electrical connection of the crimp terminal and the substrate can be achieved by designing the base.

In one implementation of the second aspect, the electronic component is a connector; the crimping terminal comprises two plug-in parts, wherein one plug-in part, the buffer supporting part and the other plug-in part are sequentially arranged along the first direction. For the crimping terminal of the connector, through the structural design of the buffer supporting part, buffer and support can be realized through a simple structure, the process complexity is reduced, the process stability and the process precision are ensured, the product size precision is further ensured, and finally the reliability of the crimping process is ensured. In addition, by having both ends of the crimp terminal have the insertion portions, the connector can be made to connect two circuit boards arranged in a stack.

In a third aspect, embodiments of the present application provide a crimp terminal, including a plugging portion and a buffer support portion, the plugging portion and the buffer support portion being arranged along a first direction; the buffer supporting part comprises a first elastic part and a second elastic part, the first elastic part and the second elastic part are arranged along a second direction perpendicular to the first direction, the first elastic part and the second elastic part are bent towards each other to form bulges, and the bulges of the first elastic part are arranged opposite to the bulges of the second elastic part and are not contacted with each other; the first elastic part and the second elastic part are used for generating elastic deformation when being pressed, and the bulge of the first elastic part is contacted with the bulge of the second elastic part.

In an implementation manner of the third aspect, the first elastic portion and the second elastic portion are symmetrical about a first axis, and the first axis extends along the first direction. The first elastic part and the second elastic part are made to be symmetrical, so that the structure of the crimping terminal is stable and reliable, the manufacturing process can be simplified, and the manufacturing precision is ensured.

In an implementation manner of the third aspect, the first elastic portion is symmetrical about a second axis, and the second axis extends along the second direction. By making at least one of the first elastic portion and the second elastic portion symmetrical, the structure of the crimp terminal can be made stable and reliable, the manufacturing process can be simplified, and the manufacturing accuracy can be ensured.

In one implementation manner of the third aspect, the first elastic portion has a smooth curve shape. By providing the first elastic portion and/or the second elastic portion with a smooth curve shape, the structure of the crimp terminal can be made simple, stable and reliable, and the first elastic portion and the second elastic portion can be accurately and quickly switched from the buffer state to the support state at the time of crimping.

In one implementation manner of the third aspect, the first elastic portion includes two straight portions, and the two straight portions form an included angle, and the included angle forms a protrusion of the first elastic portion. By providing the first elastic portion and/or the second elastic portion with the fold line shape, the structure of the crimp terminal can be made simple, stable and reliable, and the first elastic portion and the second elastic portion can be accurately and quickly switched from the buffer state to the support state at the time of crimping.

In an implementation manner of the third aspect, the protrusion of the first elastic portion and the protrusion of the second elastic portion are both one. Through making first elastic part and second elastic part all have a arch for the simple structure of first elastic part and second elastic part is reliable, can satisfy the design demand of buffering and support simultaneously.

In an implementation manner of the third aspect, the crimp terminal further includes a base, the base is located at one end of the buffer support portion opposite to the plug portion, and the base is connected to the first elastic portion and the second elastic portion, and forms a bending angle with the first elastic portion and the second elastic portion. By designing the base, reliable electrical connection of the crimp terminal and the substrate can be achieved.

In one implementation manner of the third aspect, the crimp terminal includes two plugging portions, one plugging portion, the buffer supporting portion, and the other plugging portion are sequentially arranged along the first direction. By having both ends of the crimp terminal have the insertion portions, the crimp terminal can be made to connect two circuit boards arranged in a stack.

Drawings

FIG. 1 is a schematic frame structure and application scenario diagram of a power converter according to an embodiment of the present application;

FIG. 2 is a schematic side cross-sectional view of a power converter according to an embodiment of the disclosure;

FIG. 3 is a schematic side cross-sectional view of the power module of FIG. 2;

fig. 4 is a schematic elevational structural view of the crimp terminal in fig. 3;

FIG. 5 is a schematic side elevational view of the crimp terminal of FIG. 4;

fig. 6 is a schematic structural view of a buffer support portion of the crimp terminal in fig. 4;

fig. 7 and 8 are schematic views of a process of crimping a crimp terminal to a circuit board according to an embodiment of the present application;

fig. 9 is a schematic structural view of a conventional crimp terminal;

fig. 10 is a schematic front view of the crimp terminal in another embodiment;

FIG. 11 is a schematic side elevational view of the crimp terminal of FIG. 10;

fig. 12 is a schematic structural view of a buffer support portion of the crimp terminal in fig. 10;

FIG. 13 is a schematic side cross-sectional view of a connector according to an embodiment of the present application;

fig. 14 is a schematic elevational structural view of the crimp terminal in fig. 13;

fig. 15 is a schematic structural view of a buffer support portion of the crimp terminal in fig. 13;

fig. 16 and 17 are schematic views of a process of crimping a crimp terminal to a circuit board according to an embodiment of the present application;

fig. 18 is a schematic front view of the crimp terminal in another embodiment.

Detailed Description

For ease of understanding, related art terms related to embodiments of the present application are explained and described below.

In the description of the embodiments of the present application, unless otherwise indicated, "plurality" means two or more.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Features defining "first", "second" may include one or more such features, either explicitly or implicitly.

"coupled" is to be broadly interpreted, as referring to, for example, either detachably or non-detachably; may be directly connected or indirectly connected through an intermediate medium. "fixed" is also to be understood broadly, and for example, "fixed" may be direct or may be indirect via an intermediary.

References to directional terms in the embodiments of the present application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", "top", "bottom", etc., are merely with reference to the orientation of the drawings. The directional terms are used to better and more clearly describe and understand the embodiments of the present application, and do not explicitly or implicitly refer to the device or element as having to have a particular orientation, be constructed and operate in a particular orientation, etc., and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise specified, "and/or" is merely one kind of association relationship describing the association object, meaning that three kinds of relationships may exist. For example a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The embodiment of the application provides a power converter for performing power conversion. The power converter includes, but is not limited to, an inverter, a rectifier, a chopper, an ac-to-ac converter, and the like. Power converters include, but are not limited to, applications in photovoltaic power generation, energy storage, and the like.

Fig. 1 may represent a schematic framework of a power converter and an application scenario. As shown in fig. 1, the power converter may include a controller and a conversion circuit.

The controller is electrically connected with the conversion circuit and is used for controlling the conversion circuit to work. In one embodiment, the controller may be comprised of instruction registers (instruction register, IR), program Counter (PC), and operation controller (operation controller, OC), among other components. A controller may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions). In another embodiment, the controller may be a processor or a generic term for multiple processing elements. The processor may be a general purpose central processing unit (central processing unit, CPU) or an application-specific integrated circuit (ASIC). In the alternative, the processor may be one or more integrated circuits configured to control the execution of the programs of the present application, such as, for example: one or more microprocessors (digital signal processor, DSP); or one or more field programmable gate arrays (field programmable gate array, FPGA).

The conversion circuit may be used to perform power conversion such as direct current-to-alternating current conversion (DC-AC), alternating current-to-direct current conversion (AC-DC), direct current-to-direct current conversion (DC-DC), alternating current-to-alternating current conversion (AC-AC), and the like. The conversion circuit may comprise several devices, such as a circuit board, a power module, an inductance, a capacitance, a filter circuit, a switching device, etc.

As shown in fig. 1, one side of the power converter may be connected to a power supply terminal, and the other side may be connected to a grid or a load (hereinafter referred to as grid/load). The conversion circuit may be electrically connected to the power supply side and the grid/load. The power supply terminal may be, for example, a power supply or a battery. The power supply is used for outputting electric energy in one direction. The power supply may be a power supply in a narrow sense for supplying only electric power, or may include a power supply and an inverter in the narrow sense. The power source may be, for example, a direct current source such as a photovoltaic module (i.e., photovoltaic cell) or an alternating current source. The battery can both output electrical energy and receive and store electrical energy. The load may be a direct current load or an alternating current load.

Fig. 2 illustrates a schematic side sectional structure of the power converter 1 of the present embodiment. As shown in fig. 2, the power converter 1 may include a housing 2, and a circuit board 3 and a power module 4 located within the housing 2. The power module 4 may be a component of the conversion circuit, and the power module 4 may perform power conversion. The power module 4 is electrically connected to the circuit board 3. It will be appreciated that fig. 2 illustrates only a portion of the components of the power converter 1, and not all of the components defining the power converter 1.

Fig. 3 is a schematic side sectional structure of the power module 4 in fig. 2. As shown in fig. 3, the power module 4 may include a substrate 6, a number of power devices 7, a number of crimp terminals 9, a package 5, a potting compound 8 (indicated by dot hatching), and the like.

The substrate 6 has signal transmission performance, and the substrate 6 may be a multilayer structure, for example. The specific structure and manufacturing process of the substrate 6 can be determined as required, and the present embodiment is not limited thereto.

The power device 7 includes, but is not limited to, at least one of a diode, a triode, a thyristor, a metal-oxide semiconductor field effect transistor (metal-oxide semiconductor FET, MOS-FET), an insulated gate bipolar transistor (insulated gate bipolar transistor, IGBT), an integrated circuit, and the like. The power device 7 may be disposed on the substrate 6 and electrically connected with the substrate 6.

One end of the crimp terminal 9 may be electrically connected to the substrate 6, for example, the end may be soldered to the substrate 6. Thus, the power device 7 and the crimp terminal 9 can be electrically connected through the substrate 6, and the crimp terminal 9 can serve as a PIN (PIN) of the power module 4 to transmit signals. The number of crimp terminals 9 may be set as desired, and the illustration shown in fig. 3 is only one.

The package 5 encapsulates the substrate 6, the power device 7, and a part of the crimp terminal 9, and the specific structure and manufacturing process of the package 5 may be determined according to needs, which is not limited in this embodiment.

The potting adhesive 8 can be filled in the packaging body 5, and can cover the power device 7 and the part of the crimping terminal 9 in the packaging body 5, so as to play roles in sealing, insulation, protection and the like.

The structure of the crimp terminal 9 of the present embodiment will be described in detail below.

Fig. 4 is a front view illustrating the structure of the crimp terminal 9, and fig. 5 is a side view of the crimp terminal 9 shown in fig. 4. As shown in fig. 4 and 5, the crimp terminal 9 may include a socket portion 91, a transition portion 92, and a root portion 95 connected in sequence, and the root portion 95 may include a buffer support portion 93 and a base 94. For clarity of illustration, the bounding boxes of the socket 91, transition 92, cushioning support 93 and base 94 are depicted in fig. 4 and 5 with dashed lines, it being understood that the bounding boxes define only the general boundaries of the above parts and not the strict boundaries.

As shown in fig. 4 and 5, the insertion portion 91, the transition portion 92, the root portion 95, and the base plate 6 may be sequentially arranged in a first direction, which may be a main extending direction of the crimp terminal 9, and which may be, for example, a vertical direction in fig. 4 and 5. The base 94 may extend in a second direction, which may be perpendicular or approximately perpendicular to the first direction. The base 94 and the cushioning support 93 form a bending angle, which may be about ninety degrees. In one embodiment, the buffer support 93 is connected to an end of the base 94 so that the crimp terminal 9 may form an approximately L-shaped structure. In another embodiment, the buffer support 93 may be connected to a central portion of the base 94, and both ends of the base 94 protrude beyond the buffer support 93, and such crimp terminal 9 may be formed in an approximately T-shaped structure.

As shown in fig. 4, schematically, the plugging portion 91 may be a fish-eye structure (the crimp terminal 9 is a kind of fish-eye terminal), the interior of the plugging portion 91 may be hollowed out, and an end thereof facing away from the transition portion 92 may form a tip. As shown in connection with fig. 4 and 3, the plugging portion 91 may be located outside the package body 5. The plugging portion 91 may be plugged to a circuit board (to be described later) by a crimping process. In other embodiments, the plugging portion 91 may have any other suitable structure besides a fish-eye structure, which is not limited in the embodiments of the present application.

As shown in fig. 4, the transition portion 92 may be substantially bar-shaped, which is connected between the insertion portion 91 and the buffer support portion 93. As shown in fig. 4 and 3, a portion of the transition portion 92 may be located inside the package body 5, and a portion may be exposed outside the package body 5. The transition 92 can be ensured as a structural strength of the entire crimp terminal 9.

As shown in fig. 4 and 3, the buffer support 93 is located in the package 5. Fig. 6 illustrates the buffer support 93 of fig. 4 alone. As shown in fig. 6, the buffer support portion 93 may include a first elastic portion 93a and a second elastic portion 93c, and the first elastic portion 93a and the second elastic portion 93c may be aligned in the second direction. The first elastic portion 93a and the second elastic portion 93c may be substantially bar-shaped, and both are elastic arms. Illustratively, the first elastic portion 93a and the second elastic portion 93c may be substantially symmetrically disposed on two sides of the first axis L1, where the first axis L1 may extend along the first direction. Illustratively, the first elastic portion 93a and the second elastic portion 93c may have a substantially axisymmetric structure, i.e., symmetric about a second axis L2, where the second axis L2 extends along the second direction.

As shown in fig. 6, the side surfaces of the first elastic portion 93a and the second elastic portion 93c may each have a substantially smooth curve shape, and the smooth curve shape refers to a shape in which the contour line of the elastic portion is mathematically smooth. Illustratively, both the first elastic portion 93a and the second elastic portion 93C may be approximately C-shaped. The first elastic portion 93a and the second elastic portion 93c are both bent toward each other and formed with protrusions, for example, the first elastic portion 93a is formed with protrusions 93b, the second elastic portion 93c is formed with protrusions 93d, and the protrusions 93b are disposed opposite to and not in contact with the protrusions 93d. Illustratively, only one protrusion may be formed on the first elastic portion 93a and the second elastic portion 93 c.

The symmetrical design and the smooth curve shape design are simpler in structure, so that the manufacturing process is easy to realize, and the product precision is easy to ensure.

In other embodiments, the first elastic portion 93a and the second elastic portion 93c may not be symmetrical about the first axis L1. The first elastic portion 93a and/or the second elastic portion 93c may not be required to have an axisymmetric structure. The first elastic portion 93a and/or the second elastic portion 93C may be other smooth curve shape than C-shape, for example, a "3" shape. Accordingly, the protrusion on the first elastic portion 93a and/or the second elastic portion 93c may be greater than or equal to one. Alternatively, the first elastic portion 93a and/or the second elastic portion 93c may be in an uneven curve shape, which means that the contour line of the elastic portion is a mathematically uneven curve.

As shown in fig. 6 and 4, the first elastic portion 93a is connected between the transition portion 92 and the base 94, and the second elastic portion 93c is connected between the transition portion 92 and the base 94. As shown in fig. 6 and 5, the first elastic portion 93a and the second elastic portion 93c each form an inflection angle with the base 94.

As shown in fig. 3, the mount 94 may be soldered to the substrate 6 to effect electrical connection of the crimp terminal 9 with the substrate 6, as illustrated. The base 94 is enclosed by the package 5. Bending the base 94 by about ninety degrees relative to the buffer support 93 can increase the welding area to facilitate reliable welding of the base 94 to the substrate 6. In other embodiments, the bending angle between the base 94 and the buffer support 93 is not limited to ninety degrees. Alternatively, the base 94 may not be provided, and the buffer support 93 may be directly connected to the substrate 6.

In the present embodiment, the crimp terminal 9 may be manufactured by punching a metal plate.

Fig. 7 and 8 may show a process of crimping the crimp terminal 9 of the power module 4 to the circuit board 3. The "crimping" is to insert the crimp terminal 9 into the crimp hole of the circuit board 3 by external mechanical pressure using a corresponding device and jig, and to realize the electrical connection of the crimp terminal 9 and the circuit board 3. It will be appreciated that the relative proportions of the power module 4 and the circuit board 3 are exaggerated in fig. 7 and 8 to clearly illustrate the assembly of the crimp terminal 9 and the circuit board 3.

As shown in fig. 7, when the plugging portion 91 starts to be plugged up into the press-fit hole of the circuit board 3 with respect to the circuit board 3, the circuit board 3 presses the plugging portion 91 downward, so that the first elastic portion 93a and the second elastic portion 93c are bent, and the protrusion 93b and the protrusion 93d are abutted together. When the protrusion 93b abuts against the protrusion 93d, the elastic deformation of the first elastic portion 93a and the second elastic portion 93c will weaken until stopping, and at this time, the first elastic portion 93a and the second elastic portion 93c will mainly play a supporting role. Under the supporting action and the external mechanical pressure, the insertion portion 91 can be smoothly pressed into the crimp hole, so that the crimp terminal 9 is mounted in place. When the external mechanical pressure is removed after the crimping is completed, the first elastic portion 93a and the second elastic portion 93c are restored to their original positions, and a gap is formed therebetween again as shown in fig. 8.

In the operation process of the power module 4, the first elastic portion 93a and the second elastic portion 93c may buffer and absorb deformation of the assembly structure formed by the circuit board 3 and the power module 4 due to external impact, thermal stress, mechanical stress between the circuit board 3 and the power module 4, or the like through elastic deformation, thereby ensuring mechanical reliability and electrical connection reliability of the assembly structure.

From the above, the buffer supporting portion 93 of the present embodiment can play a supporting role in the crimping process of the crimp terminal 9 so that the crimp terminal 9 is mounted in place; but also plays a role in buffering and absorbing during the operation of the power module 4.

In this embodiment, the first elastic portion 93a and the second elastic portion 93c are designed at the same portion (i.e., the portion between the transition portion 92 and the base 94) of the crimp terminal 9, and the supporting action and the buffering and absorbing action are simultaneously achieved by the first elastic portion 93a and the second elastic portion 93 c. The scheme is simple in structural design, convenient to manufacture through a simple process, low in process complexity, capable of guaranteeing process stability and process precision, further guaranteeing product size precision, and accordingly guaranteeing that the buffer supporting portion 93 can play an application role, and finally guaranteeing reliability of a crimping process.

Fig. 9 illustrates a structure of a conventional crimp terminal. As shown in fig. 9, the conventional crimp terminal includes a transition portion 101, a buffer structure 102, a bottom plate 103, and a support column 104. The buffer structure 102 connects the transition portion 101 and the bottom plate 103, the buffer structure 102 has a curved shape, and the buffer structure 102 can provide a buffer effect through elastic deformation. The support column 104 is located between the buffer structure 102 and the bottom plate 103, the support column 104 is vertical, and the support column 104 is used for providing supporting effect during crimping. It is easy to understand that the conventional crimping terminal is provided with the buffer structure 102 and the support column 104 having different structures, and the buffer structure 102 and the support column 104 are respectively arranged at different positions, so that the structure is relatively complex, and the manufacturing can be realized only by adopting relatively complex processes (a punching process and a stamping process are required to be adopted at the same time), so that the process stability and the process precision are relatively poor, the dimensional precision of a product is not guaranteed, the buffer structure 102 and the support column 104 cannot play a role easily, and the crimping failure of a power module is finally easily caused.

Fig. 10 illustrates a front view structure of the crimp terminal 9 in another embodiment of the present application, fig. 11 illustrates a side view structure of the crimp terminal 9 illustrated in fig. 10, and fig. 12 illustrates the buffer support portion 93 in the crimp terminal 9 of fig. 10 alone.

Unlike the above-described embodiment, as shown in fig. 12, the first elastic portion 93a of the buffer support 93 may not be a smooth curve shape, but may include two straight portions 93e, and the two straight portions 93e may form an included angle, which may be an acute angle, a right angle, or an obtuse angle. The intersection of the two straight portions 93e forms a protrusion 93b. Illustratively, the second elastic portion 93c may not be a smooth curve shape, but may include two straight portions 93f, and the two straight portions 93f may form an included angle, which may be an acute angle, a right angle, or an obtuse angle. The intersection of the two straight portions 93f forms a protrusion 93d. As shown in fig. 12 and 10, the transition portion 92 and the two straight portions 93e are connected in order in the first direction, and the transition portion 92 and the two straight portions 93f are connected in order in the first direction.

The first elastic portion 93a and the second elastic portion 93c shown in fig. 12 may each be approximately V-shaped (or the first elastic portion 93a is approximately ">" shaped, and the second elastic portion 93c is approximately "<"). It is easy to understand that the V-shaped first elastic portion 93a and the second elastic portion 93c may have both supporting and cushioning and absorbing effects.

Other structural forms of the cushioning support portion 93 may be obtained based on the illustration of fig. 12, for example, any one of the elastic portions 93 may include at least three sequentially connected straight portions, which may be connected in a wavy line shape, and at least one pair of protrusions on the two elastic portions may abut during the crimping process.

Fig. 13 illustrates a side cross-sectional configuration of a connector 10 according to an embodiment of the present application. As shown in fig. 13, the connector 10 may include a package 11 and a number of crimp terminals 12. The package 11 is used for protecting the crimp terminal 12, etc., the package 11 may be considered as a housing, and the specific structure of the package 11 may be determined as needed, and the embodiment is not limited thereto. It will be appreciated that fig. 13 illustrates only a portion of the components of connector 10, and not all of the components that define connector 10.

Fig. 14 illustrates a front view of the crimp terminal 12. As shown in fig. 14, the crimp terminal 12 may include two insertion portions 121, two transition portions 122, and a buffer support portion 123, one insertion portion 121, one transition portion 122, a buffer support portion 123, another transition portion 122, and another insertion portion 121 being sequentially connected in the first direction. As shown in fig. 14 and 13, two plugging portions 121 may be exposed outside the package 11, and two transition portions 122 and buffer supporting portions 123 may be located inside the package 11.

As shown in fig. 14, the structure of the plugging portion 121 may be substantially identical to the structure of the plugging portion 91 described above, as an example. The plugging portion 121 may have a fisheye structure (the crimp terminal 12 is a fisheye terminal), the interior of the plugging portion 121 may be hollowed out, and an end of the plugging portion facing away from the transition portion 92 may form a peak. The plugging portion 121 may be plugged to a circuit board (to be described later) by a crimping process. In other embodiments, the plugging portion 121 may have any other suitable structure besides a fish-eye structure, which is not limited in the embodiments of the present application.

As shown in fig. 14, the configuration of the transition portion 122 may be substantially identical to the configuration of the transition portion 92 described above, as illustrated schematically. The transition portion 122 may be substantially strip-shaped, which is connected between the insertion portion 121 and the buffer support portion 123, and which may be secured as structural strength of the entire crimp terminal 12.

Fig. 15 illustrates the buffer support 123 in fig. 14 alone. As shown in fig. 15, the buffer support 123 may substantially correspond to the structure of the buffer support 93 described above. The buffer support portion 123 may include a first elastic portion 123a and a second elastic portion 123c, and the first elastic portion 123a and the second elastic portion 123c may be aligned along the second direction. The first elastic portion 123a and the second elastic portion 123c may be substantially bar-shaped, and both are elastic arms. Illustratively, the first elastic portion 123a and the second elastic portion 123c may be substantially symmetrically disposed on two sides of the first axis L1, where the first axis L1 may extend along the first direction. Illustratively, the first elastic portion 123a and the second elastic portion 123c may have a substantially axisymmetric structure, i.e., symmetric about a second axis L2, where the second axis L2 extends along the second direction.

As shown in fig. 15, each of the first elastic portion 123a and the second elastic portion 123c may have a substantially smooth curve shape, and the smooth curve shape refers to a shape in which the contour line of the elastic portion is a mathematically smooth curve. Illustratively, the first elastic portion 123a and the second elastic portion 123C may each be approximately C-shaped. The first elastic portion 123a and the second elastic portion 123c are both bent toward each other and formed with protrusions, for example, the first elastic portion 123a is formed with protrusions 123b, the second elastic portion 123c is formed with protrusions 123d, and the protrusions 123b are disposed opposite to and not in contact with the protrusions 123d. Illustratively, only one protrusion may be formed on the first elastic portion 123a and the second elastic portion 123 c.

In other embodiments, the first elastic portion 123a and the second elastic portion 123c may not be symmetrical about the first axis L1. The first elastic portion 123a and/or the second elastic portion 123c may not be required to have an axisymmetric structure. The first elastic portion 123a and/or the second elastic portion 123C may be other smooth curve shapes than C-shaped, for example, a "3" shape. Accordingly, the protrusion on the first elastic portion 123a and/or the second elastic portion 123c may be greater than or equal to one. Alternatively, the first elastic portion 123a and/or the second elastic portion 123c may have an uneven curve shape, which means that the contour line of the elastic portion is a mathematically uneven curve.

As shown in fig. 15 and 14, the first elastic portion 123a is connected between the two transition portions 122, and the second elastic portion 123c is connected between the two transition portions 122.

In the present embodiment, the crimp terminal 12 may be manufactured by punching a metal plate.

The connector 10 of the present embodiment can be used for connecting a double-layered circuit board. Fig. 16 and 17 may show a process of crimping the crimp terminal 12 of the connector 10 to the two circuit boards 20. It will be appreciated that the structure of the two circuit boards 20 and the devices disposed thereon may be different.

As shown in fig. 16, the two plugging portions 121 may be aligned with the two circuit boards 20, respectively. In the process of inserting the two inserting portions 121 into the press-connection holes of the two circuit boards 20, the upper circuit board 20 presses the inserting portions 121 downward, and the lower circuit board 20 presses the inserting portions 121 upward, so that the first elastic portions 123a and the second elastic portions 123c are pressed and bent, and the protrusions 123b and 123d are abutted together. When the protrusion 123b abuts against the protrusion 123d, the elastic deformation of the first elastic portion 123a and the second elastic portion 123c will weaken until stopping, and at this time, the first elastic portion 123a and the second elastic portion 123c will mainly play a supporting role. Under the supporting action and the external mechanical pressure, each of the insertion portions 121 can be smoothly pressed into the corresponding crimp hole, so that the crimp terminal 12 is mounted in place. When the external mechanical pressure is removed after the crimping is completed, the first elastic portion 123a and the second elastic portion 123c are restored to their original positions, and a gap is formed therebetween again as shown in fig. 17.

During the operation of the connector 10, the first elastic portion 123a and the second elastic portion 123c may buffer and absorb deformation of the assembly structure formed by the circuit board 20 and the connector 10 due to external impact, thermal stress, mechanical stress between the circuit board 20 and the connector 10, or the like through elastic deformation, thereby ensuring mechanical reliability and electrical connection reliability of the assembly structure.

As is clear from the above, the buffer support 123 of the present embodiment can play a supporting role in the crimping process of the crimp terminal 12 so that the crimp terminal 12 is mounted in place; but also to provide cushioning and absorption during operation of the connector 10.

In the present embodiment, the first elastic portion 123a and the second elastic portion 123c are designed at the same portion (i.e., the portion between the two transition portions 122) of the crimp terminal 12, and the supporting action and the buffering and absorbing action are simultaneously achieved by the first elastic portion 123a and the second elastic portion 123 c. The scheme is simple in structural design and convenient to manufacture through a simple process, so that the process complexity is reduced, the process stability and the process precision can be ensured, and the product size precision can be further ensured.

Unlike fig. 15, in another embodiment, as shown in fig. 18, the first elastic portion 123a of the buffer supporting portion 123 may not be a smooth curve shape, but may include two straight portions 123e, and the two straight portions 123e may form an included angle, which may be an acute angle, a right angle, or an obtuse angle, and a protrusion 123b is formed at the intersection of the two straight portions 123 e. The second elastic portion 123c may not be a smooth curve shape, but may include two straight portions 123f, and the two straight portions 123f may form an included angle, which may be an acute angle, a right angle, or an obtuse angle, and a junction of the two straight portions 123f forms a protrusion 123d. As shown in fig. 18 and 14, one transition portion 122, two straight portions 123e, and another transition portion 122 may be sequentially connected in the first direction, and one transition portion 122, two straight portions 123f, and another transition portion 122 may be sequentially connected in the first direction.

The first elastic portion 123a and the second elastic portion 123c shown in fig. 18 may each be approximately V-shaped (or the first elastic portion 123a is approximately ">" shaped, and the second elastic portion 123c is approximately "<"). It is easy to understand that the V-shaped first elastic portion 123a and the second elastic portion 123c may have both supporting and cushioning and absorbing effects.

Other structural forms of the buffer support 123 may be obtained based on the illustration of fig. 18, for example, any one of the elastic parts of the buffer support 123 may include at least three sequentially connected straight parts, which may be connected in a wavy line shape, and at least one pair of protrusions on the two elastic parts may be abutted during the crimping process.

In the embodiment of the present application, the power module and the connector may be collectively referred to as an electronic component.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A power converter is characterized in that,

the circuit board and the power module are both positioned in the shell;

the power module comprises a substrate, a power device and a crimping terminal, wherein the power device is arranged on the substrate;

the crimping terminal comprises a plugging part and a root part, wherein the plugging part, the root part and the substrate are sequentially arranged along a first direction, the plugging part is plugged with the circuit board, and the root part is electrically connected with the substrate; the root part comprises a first elastic part and a second elastic part, the first elastic part and the second elastic part are arranged along a second direction perpendicular to the first direction, the first elastic part and the second elastic part are bent towards each other to form a bulge, and the bulge of the first elastic part and the bulge of the second elastic part are arranged in opposite directions and are not contacted;

the first elastic part and the second elastic part are used for generating elastic deformation when being stressed, and the bulge of the first elastic part is contacted with the bulge of the second elastic part.

2. The power converter of claim 1, wherein the power converter comprises a power converter,

the first elastic portion and the second elastic portion are symmetrical about a first axis extending in the first direction.

3. A power converter according to claim 1 or 2, characterized in that,

the first elastic portion is symmetrical about a second axis extending in the second direction.

4. A power converter according to any of claims 1-3,

the first elastic portion has a smooth curve shape.

5. A power converter according to any of claims 1-3,

the first elastic part comprises two straight line parts, wherein the two straight line parts form an included angle, and the included angle forms a bulge of the first elastic part.

6. A power converter according to any of claims 1-5,

the protrusions of the first elastic part and the protrusions of the second elastic part are one.

7. A power converter according to any of claims 1-6,

the root part further comprises a base, the base is positioned at one end of the first elastic part, which is opposite to the plug-in connection part, and the base is connected with the first elastic part and the second elastic part and forms a bending angle with the first elastic part and the second elastic part; the base is electrically connected with the substrate.

8. An electronic component, characterized in that,

comprises a package body and a crimping terminal;

the crimping terminal comprises a plug-in connection part and a buffer supporting part, wherein the plug-in connection part and the buffer supporting part are arranged along a first direction; the buffer supporting part comprises a first elastic part and a second elastic part, the first elastic part and the second elastic part are arranged along a second direction perpendicular to the first direction, the first elastic part and the second elastic part are bent towards each other to form bulges, and the bulges of the first elastic part and the bulges of the second elastic part are arranged in opposite directions and are not contacted;

the buffer supporting part is positioned in the packaging body, and the plug-in part is exposed outside the packaging body;

the plug-in part is used for being pressed and connected to the circuit board, the first elastic part and the second elastic part are used for generating elastic deformation, and the bulge of the first elastic part is contacted with the bulge of the second elastic part.

9. The electronic component according to claim 8, wherein,

10. An electronic component according to claim 8 or 9, characterized in that,

11. An electronic component according to any one of claims 8-10, characterized in that,

the first elastic portion has a smooth curve shape.

12. An electronic component according to any one of claims 8-10, characterized in that,

13. A power converter according to any of claims 8-12,

14. An electronic component according to any one of claims 8-13, characterized in that,

the electronic component is a power module and further comprises a substrate and a power device, wherein the substrate and the power device are both positioned in the package body, and the power device is arranged on the substrate;

the crimping terminal further comprises a base, wherein the base is positioned in the package body and positioned at one end of the buffer supporting part, which is opposite to the plug-in part, and the base is connected with the first elastic part and the second elastic part and forms a bending angle with the first elastic part and the second elastic part; the base is electrically connected with the substrate.

15. An electronic component according to any one of claims 8-13, characterized in that,

the electronic component is a connector;

the crimping terminal comprises two plugging parts, wherein one plugging part, the buffer supporting part and the other plugging part are sequentially arranged along the first direction.