阅读说明：本技术 一种功率模块端子 (Power module terminal ) 是由 柯攀 齐放 戴小平 曾亮 姚亮 刘洋 于 2020-04-10 设计创作，主要内容包括：本发明公开了一种功率模块端子,包括依次相连的头部、中间部和焊接结构；所述焊接结构包括支撑部、缓冲部和焊接部,所述支撑部的一端与所述中间部相连,另一端与所述焊接部的一端相连,所述焊接部的另一端与所述缓冲部的一端相连,所述缓冲部的另一端与所述中间部之间设置有止口结构；所述焊接结构的支撑部、缓冲部和焊接部整体呈三角形。本发明的功率模块端子具有结构简单、抗振性能好、焊接强度大、通流能力好等优点。(The invention discloses a power module terminal, which comprises a head part, a middle part and a welding structure which are sequentially connected; the welding structure comprises a supporting part, a buffering part and a welding part, one end of the supporting part is connected with the middle part, the other end of the supporting part is connected with one end of the welding part, the other end of the welding part is connected with one end of the buffering part, and a seam allowance structure is arranged between the other end of the buffering part and the middle part; the supporting part, the buffering part and the welding part of the welding structure are integrally triangular. The power module terminal has the advantages of simple structure, good vibration resistance, high welding strength, good through-current capacity and the like.)

1. A power module terminal is characterized by comprising a head part (1), an intermediate part (2) and a welding structure (3) which are sequentially connected; the welding structure (3) comprises a supporting part (301), a buffering part (303) and a welding part (302), one end of the supporting part (301) is connected with the middle part (2), the other end of the supporting part is connected with one end of the welding part (302), the other end of the welding part (302) is connected with one end of the buffering part (303), and a seam allowance structure (304) is arranged between the other end of the buffering part (303) and the middle part (2); the supporting part (301), the buffering part (303) and the welding part (302) of the welding structure (3) are integrally triangular.

2. The power module terminal as claimed in claim 1, wherein the spigot structure (304) includes a spigot groove (3041) and a spigot face (3042), the spigot groove (3041) being located at the other end of the buffer portion (303), the spigot face (3042) being located at the end of the intermediate portion (2), the spigot groove (3041) and the spigot face (3042) being engaged with each other; or the mouth-stop groove (3041) is positioned at the end part of the middle part (2), the mouth-stop surface (3042) is positioned at the other end of the buffer part (303), and the mouth-stop groove (3041) and the mouth-stop surface (3042) are mutually meshed.

3. The power module terminal of claim 2, wherein the stop groove (3041) is U-shaped or V-shaped.

4. The power module terminal according to claim 1, wherein the spigot structure (304) includes a spigot surface (3042), the spigot surface (3042) being located at an end of the intermediate portion (2), a stop step (3043) being formed between the spigot surface (3042) and the intermediate portion (2), the spigot surface (3042) being fitted with an end surface of the other end of the buffer portion (303); or the stop surface (3042) is positioned at the end part of the buffer part (303), a limit step (3043) is formed between the stop surface (3042) and the buffer part (303), and the stop surface (3042) is matched with the end surface of the middle part (2).

5. The power module terminal as claimed in any one of claims 1 to 4, wherein a projection or/and a flash hole are provided on the welding face (3021) of the welding portion (302).

6. The power module terminal according to any one of claims 1 to 4, wherein one end of the support portion (301) is connected to a part of the intermediate portion (2), the other end of the welding portion (302) extends to one side to be connected to one end of the buffer portion (303), and the other end of the buffer portion (303) is connected to another part of the intermediate portion (2).

7. A power module terminal according to claim 6, characterised in that the angle between the support (301) and buffer (303) portions and the intermediate portion (2) is the same.

8. The power module terminal according to any one of claims 1 to 4, wherein a joint between the welding portion (302) and the support portion (301) is a bent portion subjected to scraping or material removal.

9. The power module terminal according to any one of claims 1 to 4, wherein the support portion (301), the buffer portion (303), the welding portion (302), and the intermediate portion (2) are all of an integrated structure.

10. The power module terminal according to any one of claims 1 to 4, wherein the head portion (1), the intermediate portion (2) and the welded structure (3) are made of copper.

Technical Field

The invention mainly relates to the field of power module manufacturing, in particular to a power module terminal.

Background

Various terminals are used in power modules, which may be integral with the housing and connected to the chip by wire bonding or ultrasonic bonding, or may be separate terminals soldered into the module and electrically connected to the chip. Wherein individual terminals can be more flexibly arranged around the chip, so that the inductance of the module is reduced, and the module is widely applied. However, the power module terminal used at present has the problems of weak vibration resistance, low terminal strength and the like.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides the power module terminal which is simple in structure and good in vibration resistance.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a power module terminal comprises a head part, a middle part and a welding structure which are sequentially connected; the welding structure comprises a supporting part, a buffering part and a welding part, one end of the supporting part is connected with the middle part, the other end of the supporting part is connected with one end of the welding part, the other end of the welding part is connected with one end of the buffering part, and a seam allowance structure is arranged between the other end of the buffering part and the middle part; the supporting part, the buffering part and the welding part of the welding structure are integrally triangular.

As a further improvement of the above technical solution:

the spigot structure comprises a spigot groove and a spigot surface, the spigot groove is positioned at the other end of the buffer part, the spigot surface is positioned at the end part of the middle part, and the spigot groove and the spigot surface are mutually meshed; or the spigot groove is positioned at the end part of the middle part, the spigot surface is positioned at the other end of the buffer part, and the spigot groove and the spigot surface are mutually meshed.

The spigot groove is U-shaped or V-shaped.

The spigot structure comprises a spigot surface, the spigot surface is positioned at the end part of the middle part, a limiting step is formed between the spigot surface and the middle part, and the spigot surface is matched with the end surface of the other end of the buffer part; or the spigot surface is positioned at the end part of the buffer part, a limit step is formed between the spigot surface and the buffer part, and the spigot surface is matched with the end surface of the middle part.

And a lug boss or/and a flash hole are/is arranged on the welding surface of the welding part.

One end of the supporting portion is connected with one part of the middle portion, the other end of the welding portion extends towards one side to be connected with one end of the buffering portion, and the other end of the buffering portion is connected with the other part of the middle portion.

The included angles between the supporting part and the middle part and between the buffering part and the middle part are the same.

The joint between the welding part and the supporting part is a bending part subjected to scraping or material removing treatment.

The supporting part, the buffer part, the welding part and the middle part are all of an integrated structure.

The head portion, the middle portion and the welding structure are made of copper materials.

Compared with the prior art, the invention has the advantages that:

according to the power module terminal, when the terminal head is stressed, the head and the middle part are compressed towards one side of the welding structure, the opening is formed between the buffer part and the middle part, so that the buffer part can move towards one side of the middle part, when the terminal head moves to the maximum distance, the seam allowance structure enables the middle part and the buffer part to be mutually supported, and at the moment, the corresponding welding structure, namely the support part, the buffer part and the welding part form a stable triangular structure, so that the whole structure has high structural rigidity and is not easy to deform, the pressure of the terminal head and the external vibration can be resisted, and the vibration resistance is improved. The spigot has simple structure and good vibration resistance.

According to the power module terminal, the lug boss or/and the flash hole are/is arranged on the welding surface of the welding part, so that the tin paste amount of the welding surface can be ensured, and the welding strength is enhanced. In addition, the junction between the face of weld of welding portion and the supporting part is through scraping material or removing the material processing for the radian of bending of junction is minimum, thereby maximize welding area, thereby reduces the size of terminal welding portion, also can further improve follow-up welded intensity.

According to the power module terminal, the supporting part, the buffering part, the welding part and the middle part are all of an integrated structure, and meanwhile the head part, the middle part and the welding structure are all made of copper materials (such as T2 red copper and TU copper), so that the good through-current capacity of the whole terminal is guaranteed.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic front view of a first embodiment of the present invention.

Fig. 3 is a schematic side view of the first embodiment of the present invention.

Fig. 4 is a schematic perspective view of a second embodiment of the present invention.

Fig. 5 is a schematic front view of the second embodiment of the present invention.

Fig. 6 is a schematic side view of the second embodiment of the present invention.

The reference numbers in the figures denote: 1. a head portion; 2. an intermediate portion; 3. welding a structure; 301. a support portion; 302. welding the part; 3021. welding a surface; 303. a buffer section; 304. a spigot structure; 3041. a spigot groove; 3042. a spigot surface; 3043. and a limiting step.

Detailed Description

The invention is further described below with reference to the figures and the specific embodiments of the description.