CN219832633U

CN219832633U - Power module and electrode terminal

Info

Publication number: CN219832633U
Application number: CN202320780390.3U
Authority: CN
Inventors: 张小兵; 廖光朝
Original assignee: Chongqing Yuntong Technology Co ltd
Current assignee: Chongqing Yuntong Technology Co ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-10-13
Anticipated expiration: 2033-04-11

Abstract

The utility model discloses a power module and an electrode terminal, wherein the module comprises an outer frame, the electrode terminal and a ceramic copper-clad plate assembled in the outer frame and used for circuit layout, the electrode terminal comprises a first section and a second section, the first section is used for being installed on the outer frame, one end of the second section is connected with the first section, and the other end of the second section extends for a section of length and then is bent downwards to form a connecting section used for being electrically connected with the ceramic copper-clad plate; the first section of the electronic terminal is assembled on the outer frame, the second section is positioned above the ceramic copper-clad plate, and the connecting section can contact the ceramic copper-clad plate to be used for realizing electric connection with the ceramic copper-clad plate. The utility model reduces the mode that the copper covered on the DBC is connected to the edge of the outer frame through etching; the problem that the DBC is insufficient in the overcurrent capacity and the difficulty of road layout wiring in a limited area is solved; the wiring layout on the DBC is reduced, and the problem of mismatching of stray inductance and resistance-capacitance is reduced.

Description

Power module and electrode terminal

Technical Field

The present utility model relates to a power module and an electrode terminal.

Background

In the existing power module, an electrode terminal is mainly connected with a DBC ceramic copper-clad plate at the edge of an outer frame in a metal manner, and overcurrent is realized by etching a circuit trace on the DBC ceramic copper-clad plate. This structure has the following problems:

the copper-clad thickness industry on a ceramic copper-clad plate DBC is generally 0.3mm, and the overcurrent (current flows) on a copper sheet with the thickness, especially the overcurrent (large current or current exceeds a rated value) has the condition of insufficient overcurrent capacity;

the thickness of copper-clad on the ceramic copper-clad plate DBC leads to high resistance and temperature rise when the current is excessive;

the problem of stray inductance and resistance-capacitance mismatch is easily generated by a plurality of wirings in a limited area on the ceramic copper clad laminate DBC.

Disclosure of Invention

The utility model aims to solve the defects of the existing power module, and provides the power module which can effectively reduce the problems of mismatching of stray inductance and resistance capacitance, difficult wiring of circuit layout, insufficient overcurrent capacity and the like to a certain extent.

The power module comprises an outer frame, an electrode terminal and a ceramic copper-clad plate assembled in the outer frame and used for circuit layout, wherein the electrode terminal comprises a first section and a second section, the first section is used for being installed on the outer frame, one end of the second section is connected with the first section, and the other end of the second section extends for a certain length and then is bent downwards to form a connecting section used for being electrically connected with the ceramic copper-clad plate;

the first section of the electrode terminal is assembled on the outer frame, the second section is positioned above the ceramic copper-clad plate, and the connecting section can contact the ceramic copper-clad plate to be used for realizing electric connection with the ceramic copper-clad plate.

In some embodiments, the connection section (23) is L-shaped, increasing the contact area of the electrode terminal, facilitating electrical connection.

In some embodiments, the thickness of the second section is greater than 1.3mm and less than 1.7mm.

Another object of the present utility model is to provide an electrode terminal including a first section for being mounted on an outer frame and a second section having one end connected to the first section and the other end extending a length and then bent downward to form a connection section for electrical connection.

In some embodiments, the second section includes a second section a having a certain width and length, and a second section B, one end of the second section a is connected to the first section, and the other end is connected to the second section B, and the second section B extends for a certain length and then bends downwards to form a connection section for electrical connection; the second section B is configured to include at least two sections.

In some embodiments, the first section is configured to include a first section a and a first section B, the first section B being formed by extending a length of the first section a and bending downward; and the first section A is provided with an assembly hole.

In some embodiments, the first and second sections are integrally formed, improving the rigidity of the electrode terminal.

The technical scheme of the utility model utilizes the structural dimension design of the electrode terminal with the extended space dimension, and the extended electrode terminal is directly used for directly connecting the circuits on the ceramic copper-clad plate in the power module, thereby achieving the following technical effects:

1. the manner of reconnecting the DBC copper overlay to the edge of the outer frame by etching the trace is reduced.

2. The problems of difficulty in routing of the road layout and insufficient overcurrent capacity of the DBC in a limited area are solved.

3. The size of the electrode terminal is utilized, the thickness is configured to be about 1.5mm, the overcurrent capacity is improved, and the temperature rise of the product is reduced.

4. The space structure is utilized to prolong the overcurrent capacity of the terminal, so that the wiring layout on the DBC is reduced, and the problem of mismatching of stray inductance and resistance-capacitance is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. It is evident that the drawings in the following description are only some embodiments of the utility model and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art. In the drawings:

fig. 1 is a schematic structural diagram of a power module according to the present utility model;

FIG. 2 is a schematic structural view of an outer frame according to the present utility model;

fig. 3 is a schematic structural view of an electrode terminal according to the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the power module provided by the utility model comprises an outer frame 1, an electrode terminal 2 and a ceramic copper-clad plate 3 assembled in the outer frame 1 and used for circuit layout, wherein the electrode terminal 2 comprises a first section 21 and a second section 22, the first section 21 is used for being installed on the outer frame 1, one end of the second section 22 is connected with the first section 21, and the other end extends for a certain length and then is bent downwards to form a connecting section 23 used for being electrically connected with the ceramic copper-clad plate;

the first section 21 of the electrode terminal 2 is assembled on the outer frame 1, the second section 22 is located above the ceramic copper-clad plate 3, and the connecting section 23 can contact the ceramic copper-clad plate 3. After the electrode terminal 2 is assembled on the outer frame 1, the connecting section 23 is positioned at a position where electrical connection is required to be realized, so that electrical connection with a specific position of the ceramic copper-clad plate 3 is realized. The positions to be electrically connected are different according to the different functional circuits constructed on the ceramic copper-clad plate 3, if the functional circuits are three-phase full-bridge circuits, the grid electrode, the drain electrode and the source electrode of the transistor forming the full-bridge circuits are the positions to be electrically connected, so that the connection of power supply and control signals and the connection of output are realized.

In the present disclosure, the second section 22 of the electrode terminal 2 includes a second section a221 having a certain width H and a length L, and a second section B222, one end of the second section a221 is connected to the first section 21, the other end is connected to the second section B222, and the second section B222 extends for a certain length and then is bent downward to form a connection section 23 for electrical connection, which is L-shaped. The horizontal section of the second section B222 provides a larger contact area, which is more advantageous for soldering or bonding to achieve electrical connection.

The second section B222 of the electrode terminal 2 is configured with one, two or three sections as needed to meet the requirements of different power modules. The first section 21 and the second section 22 are integrally formed, or welded.

The thickness of the second section 22 of the electrode terminal is configured as needed, and is configured to be greater than 1.3mm and less than 1.7mm.

In the module, the first section 21 is configured to include a first section a211 and a first section B212, and the first section B212 is formed by extending a length of the first section a211 and then bending downwards; the first section A211 is provided with an assembly hole, and the outer frame 1 is provided with a through hole matched with the assembly hole, so that the assembly of the first section A211 and the outer frame is realized in a screw and bolt mode. It is also understood that the first section 21 is not provided with a fitting hole, and the electrode terminal 2 and the outer frame 1 are integrally formed by pressing, or interference fit.

The present disclosure has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of implementation of the present disclosure. It must be noted that the disclosed embodiments do not limit the scope of the present disclosure. Rather, the foregoing is considered to be illustrative, and it is to be understood that the utility model is not limited to the specific details disclosed herein.

Claims

1. The power module is characterized by comprising an outer frame (1), electrode terminals (2) and a ceramic copper-clad plate (3) assembled in the outer frame and used for circuit layout, wherein the electrode terminals (2) comprise a first section (21) and a second section (22), the first section (21) is used for being installed on the outer frame (1), one end of the second section (22) is connected with the first section (21), and the other end of the second section (22) extends for a certain length and then is bent downwards to form a connecting section (23) used for being electrically connected with the ceramic copper-clad plate;

the first section (21) of the electrode terminal (2) is assembled on the outer frame (1), the second section (22) is located above the ceramic copper-clad plate (3), and the connecting section (23) can contact the ceramic copper-clad plate (3) to be electrically connected with the ceramic copper-clad plate (3).

2. A power module according to claim 1, characterized in that the connection section (23) is L-shaped.

3. A power module according to claim 1, characterized in that the thickness of the second section (22) is greater than 1.3mm and less than 1.7mm.

4. An electrode terminal, characterized in that the terminal comprises a first section (21) and a second section (22), wherein the first section (21) is used for being mounted on an outer frame (1), one end of the second section (22) is connected with the first section (21), and the other end extends for a certain length and then is bent downwards to form a connecting section (23) for electric connection.

5. The electrode terminal according to claim 4, wherein the second section (22) includes a second section a (221) having a certain width and length, and a second section B (222), one end of the second section a (221) is connected to the first section (21), the other end is connected to the second section B (222), and the second section B (222) is bent downward after extending for a certain length to form a connection section (23) for electrical connection; the second segment B (222) is configured to include at least two segments.

6. The electrode terminal according to claim 4, wherein the first section (21) is configured to include a first section a (211) and a first section B (212), the first section B (212) being formed by extending a length of the first section a (211) and then bending downward; and the first section A (211) is provided with an assembly hole.

7. The electrode terminal according to claim 4, wherein the first section (21) and the second section (22) are integrally formed.

8. The electrode terminal according to claim 4, wherein the thickness of the second section (22) is greater than 1.3mm and less than 1.7mm.