A power assembly terminal module and a power assembly

Abstract

The utility model discloses a kind of power component terminal module and power component, module includes positive power terminal, negative power terminal and the insulating piece being set between the two. Among them, negative power terminal has the first part and second part along the first direction extension, and the connecting portion connecting the two;Positive power terminal also extends along the first direction, and is stacked with negative terminal in the second direction of vertical. Connecting piece is set between the two, and reliable insulation isolation between positive and negative terminal is realized by insulating piece. The design makes positive, negative power terminal be able to be closely stacked, and the magnetic field generated by reverse current is mutually coupled to offset, so as to effectively reduce the stray inductance of power loop, solve the problem that power density promotion is restricted due to insulation spacing requirement.

Description

Technical Field

[0001] This utility model relates to the field of motor controllers, and in particular to a novel power module. Background Technology

[0002] Power terminals are key conductive components in power modules, responsible for efficiently and reliably leading the large currents generated by internal power chips (such as IGBTs and SiC MOSFETs) to external circuits. They are widely used in power electronic devices such as motor controllers and inverters. In traditional designs, for electrical safety and ease of assembly, the positive and negative power terminals of the module are usually arranged in parallel or separately, maintaining a certain safety distance between them, and achieving basic electrical insulation through air, plastic frames, or large creepage distances.

[0003] However, the traditional arrangement described above presents a significant contradiction: to ensure sufficient insulation margin between the positive and negative terminals and prevent breakdown or short circuits, they must be separated by a certain distance. This distance directly increases the area of ​​the current loop, resulting in a higher stray inductance in the power circuit. A larger stray inductance can cause severe voltage spikes, increase switching losses, and exacerbate electromagnetic interference during high-speed switching of power devices, thus limiting improvements in switching frequency and efficiency. Ultimately, this problem has become one of the key bottlenecks restricting further breakthroughs in power density, dynamic performance, and reliability of power modules and even the entire power supply system.

[0004] Therefore, how to significantly reduce the distance between positive and negative power terminals while ensuring absolute electrical insulation safety, thereby effectively reducing stray inductance, has become an urgent problem to be solved in this field. Utility Model Content

[0005] In order to overcome the above-mentioned technical defects, the purpose of this utility model is to provide a power component terminal module and a power component.

[0006] This utility model discloses a power component terminal module, which includes a positive power terminal, a negative power terminal, and an insulating component. The negative power terminal includes a first part, a second part, and a connecting part; the first part and the second part extend along a first direction; the connecting part is disposed and fixed between the first part and the second part. The positive power terminal also extends along the first direction and is stacked with the negative power terminal in the second direction; the second direction is perpendicular to the first direction. An insulating element is disposed in the second direction between the negative power terminal and the positive power terminal to insulate and isolate the negative power terminal and the positive power terminal.

[0007] Preferably, the insulating component is at least one of insulating tape, insulating gasket, and insulating coating.

[0008] Preferably, when the insulating component is an insulating coating, the positive power terminal and the negative power terminal are directly bonded together.

[0009] Preferably, when the insulating component is insulating tape and / or insulating pad, one side of the insulating component is in contact with the positive power terminal, and the other side is in contact with the negative power terminal; The positive power terminal and the negative power terminal are arranged at relative intervals.

[0010] Preferably, the thickness of the insulating component is 0.1mm-0.5mm.

[0011] Preferably, the insulation strength of the insulating component is greater than or equal to 10kV / mm.

[0012] Preferably, the insulating component covers the entire surface of the connection portion facing the positive power terminal.

[0013] Preferably, the insulating member has a hollow structure; on a plane perpendicular to the second direction, the insulating member is arranged in a ring on the inner circumference of the surface of the connecting portion facing the positive power terminal.

[0014] A second aspect of this application provides a power component including at least one power component terminal module as described in any of the preceding claims.

[0015] Compared with existing technologies, the above technical solution has the following advantages: 1. This application successfully achieves a close-packed arrangement of the positive and negative power terminals by introducing an insulating component between them. This design fundamentally solves the contradiction in the prior art where a large spacing must be maintained due to the inability to reliably insulate. The insulating component, while ensuring absolute electrical isolation, allows the positive and negative power terminals to be arranged more closely, enabling reverse currents to approach each other. The magnetic fields they generate are then fully coupled and cancel each other out, thereby significantly reducing the stray inductance of the power circuit. 2. This application provides various specific implementation methods, such as insulating coatings, tapes, and gaskets, giving the design a high degree of flexibility and manufacturability. Different insulation forms can be adapted to various processes, from integrated coating to discrete mounting, to meet the needs of different cost and application scenarios. In particular, by precisely controlling the thickness and insulation strength of the insulation layer, magnetic coupling efficiency and structural compactness are optimized to the maximum extent while ensuring safe withstand voltage. 3. Furthermore, through structural designs such as full coverage or open ring-shaped insulation components, key areas are protected or materials are optimized, enhancing overall performance such as local insulation reliability and heat dissipation. When this terminal module is integrated as a core unit into power components, it can significantly reduce the parasitic inductance of the power components and increase power density. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the power component terminal module provided in this application.

[0017] Reference numerals: 100, Power component terminal module; 1. Positive power terminal; 2. Negative power terminal; 21. First part; 22. Second part; 23. Connecting part; 3. Insulating components; x, the first direction; z, the second direction. Detailed Implementation

[0018] The advantages of this utility model are further illustrated below with reference to the accompanying drawings and specific embodiments.

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0020] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0021] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if," as used herein, can be interpreted as "when," "in response to determination," or "when," or "in the event of a determination." In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrating this invention and has no specific meaning in itself. Therefore, "module" and "part" can be used interchangeably.

[0024] Please see Figure 1 , Figure 1 This is a schematic diagram of the power component terminal module provided in this application.

[0025] like Figure 1 As shown, this utility model discloses a power component terminal module 100, which includes a positive power terminal 1, a negative power terminal 2, and an insulating component 3. The negative power terminal 2 includes a first part 21, a second part 22, and a connecting part 23; the first part 21 and the second part 22 extend along a first direction x; the connecting part 23 is disposed and fixed between the first part 21 and the second part 22. The positive power terminal 1 also extends along the first direction x and is stacked with the negative power terminal 2 in the second direction z; the second direction z is perpendicular to the first direction x. The insulating element 3 is disposed between the negative power terminal 2 and the positive power terminal 1 in the second direction z to insulate and isolate the negative power terminal 2 and the positive power terminal 1.

[0026] This application successfully achieves a close stacked arrangement of the positive power terminal 1 and the negative power terminal 2 by introducing an insulating element 3 between them. This design fundamentally solves the contradiction in the prior art where a large distance must be maintained due to the inability to reliably insulate. The insulating element 3, while ensuring absolute electrical isolation, allows the positive power terminal 1 and the negative power terminal 2 to be arranged relatively closely, enabling reverse currents to approach each other and their generated magnetic fields to be fully coupled and cancel each other out, thereby significantly reducing the stray inductance of the power circuit.

[0027] It should be noted that the specific positional correspondence between the positive power terminal 1 and the negative power terminal 2 is not limited. For example... Figure 1 As shown, in one possible implementation, the positive power terminal 1 is located directly above the connection portion 23 in the second direction z. The first portion 21 and the second portion 22 are located on both sides of the connection, and may or may not coincide with the projection of the positive power terminal 1 in the second direction z; this application does not impose any restrictions here.

[0028] The above is an explanation of the basic concept and implementation of this application. The specific implementation of each component will be explained below.

[0029] First, the specific material of the insulating component 3 is not limited.

[0030] In one possible implementation, the insulating component 3 is at least one of insulating tape, insulating gasket, and insulating coating. This solution clarifies multiple implementation methods such as insulating tape, gasket, or coating, providing specific and diverse implementation paths for the core concept of insulating lamination. Different insulating materials can be adapted to different production processes (such as winding, mounting, and spraying) and cost requirements, enabling this low-inductance design to be flexibly applied to various power module manufacturing scenarios, greatly expanding its industrialization potential.

[0031] Furthermore, when the insulating component 3 is an insulating coating, the positive power terminal 1 and the negative power terminal 2 are directly attached.

[0032] This can be understood as follows: when the insulating component 3 is an insulating coating, it can be directly applied to the contact area between the positive power terminal 1 and / or the negative power terminal 2, thereby forming an insulating barrier directly on the terminal surface. This eliminates the need for additional assembly components and allows the positive and negative terminals to achieve the theoretical minimum spacing. This direct contact not only optimizes the inductance cancellation effect but also avoids interface contact problems, improving mechanical strength and long-term insulation reliability.

[0033] In another possible implementation, when the insulating element 3 is an insulating tape and / or an insulating pad, one side of the insulating element 3 is attached to the positive power terminal 1, and the other side is attached to the negative power terminal 2. The positive power terminal 1 and the negative power terminal 2 are arranged at intervals relative to each other.

[0034] This solution utilizes insulating tape or gaskets to create a physical isolation layer between the positive and negative terminals. This design cleverly addresses the dual requirements of insulation and positioning: the insulating component 3 itself provides reliable electrical isolation, while its defined thickness simultaneously acts as a mechanical gasket to maintain optimal stacking spacing, ensuring stable and consistent magnetic field coupling.

[0035] Secondly, the inherent characteristics of the insulating component 3 are also not limited.

[0036] In one possible implementation, the thickness of the insulating element 3 is 0.1mm-0.5mm. By precisely defining the thickness of the insulating element 3, a golden balance point between insulation safety and electromagnetic coupling efficiency has been found. This thickness range provides sufficient insulation withstand voltage margin to prevent dielectric breakdown, while minimizing the spacing increment introduced by the insulation layer, thus achieving the low inductance design goal without damage while ensuring safety.

[0037] In one possible implementation, the insulation strength of insulator 3 is greater than or equal to 10kV / mm. By limiting the insulation strength of insulator 3, it is ensured that the entire laminated structure can withstand the harsh high-voltage electric field environment inside the power module. High insulation strength is a technical guarantee for reliable isolation achieved through thin layers, enabling the compact laminated design not only to be used in low-voltage applications but also to be safely extended to high-voltage and high-power applications.

[0038] Finally, the specific arrangement of the insulating component 3 is also not limited.

[0039] In one possible implementation, the insulating element 3 covers the entire surface of the connection portion 23 facing the positive power terminal 1. By fully covering the critical connection area, any possible electric field concentration or creepage risk at that location can be eliminated as much as possible, providing the strongest safety performance for the entire low-inductance circuit.

[0040] In another possible implementation, the insulating element 3 is a hollow structure; on a plane perpendicular to the second direction z, the insulating element 3 is arranged around the inner periphery of the surface of the connecting portion 23 facing the positive power terminal 1. This hollow, annular insulating element 3 design achieves an optimized allocation of function and materials. On the one hand, it provides insulation isolation at the connecting portion 23, which requires insulation; on the other hand, it reduces the amount of insulation material used in the central area. This not only reduces weight and cost but also helps dissipate heat from the power terminal.

[0041] Those skilled in the art will understand that the solutions provided above can be freely combined to meet the needs of various designs, and this application makes no restrictions here.

[0042] A second aspect of this application provides a power component including at least one power component terminal module 100 as described in any of the preceding claims. This enables the power component to achieve excellent overall low stray inductance performance while also ensuring the fundamental reliability of its critical internal insulation through unitization and modularization, thereby enhancing the safety and robustness of the power component.

[0043] It should be noted that the embodiments of this utility model have better implementability and are not intended to limit this utility model in any way. Any person skilled in the art may use the above-disclosed technical content to change or modify it into equivalent effective embodiments. However, any modifications or equivalent changes and modifications made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A power component terminal module, characterized in that, The power component terminal module includes a positive power terminal, a negative power terminal, and an insulating component; The negative power terminal includes a first part, a second part, and a connecting part; the first part and the second part extend along a first direction; the connecting part is disposed and fixed between the first part and the second part. The positive power terminal also extends along the first direction and is stacked with the negative power terminal in the second direction; the second direction is perpendicular to the first direction. The insulating member is disposed between the negative power terminal and the positive power terminal in the second direction to insulate and isolate the negative power terminal and the positive power terminal.

2. The power component terminal module as described in claim 1, characterized in that, The insulating component is at least one of insulating tape, insulating gasket, and insulating coating.

3. The power component terminal module as described in claim 2, characterized in that, When the insulating component is an insulating coating, the positive power terminal and the negative power terminal are directly attached.

4. The power component terminal module as described in claim 2, characterized in that, When the insulating component is insulating tape and / or insulating pad, one side surface of the insulating component is in contact with the positive power terminal, and the other side surface is in contact with the negative power terminal; The positive power terminal and the negative power terminal are arranged at a relative interval.

5. The power component terminal module as described in claim 4, characterized in that, The thickness of the insulating component is 0.1mm-0.5mm.

6. The power component terminal module as described in claim 1, characterized in that, The insulation strength of the insulating component is greater than or equal to 10kV / mm.

7. The power component terminal module as described in claim 1, characterized in that, The insulating component covers the entire surface of the connection portion facing the positive power terminal.

8. The power component terminal module as described in claim 1, characterized in that, The insulating component has a hollow structure; on a plane perpendicular to the second direction, the insulating component is arranged around the inner circumference of the surface of the connecting portion facing the positive power terminal.

9. A power component, characterized in that, The power component includes at least one power component terminal module as described in any one of claims 1-8.

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