An internal external lead connector for a power electronic module

Abstract

This utility model discloses an internal external lead connector for a power electronic module. The connector is used for internal and external current transmission of the power circuit module. The connector includes: a connector body, the connector having a "U" shaped structure, one end of the "U" being an internal connection end and the other end being an external connection end. The internal connection end is a straight part that connects to the internal circuit board pads, and the external connection end is a "U" shaped notch or round hole that connects to the external lead post.

Description

Technical Field

[0001] This utility model belongs to the field of micro-assembly, specifically relating to an internal external lead connector for a power electronic module. Background Technology

[0002] Power electronic modules are key components in the field of power electronics, mainly used for power conversion, power amplification, and power supply control.

[0003] As the application fields of power module circuits continue to expand, the processing efficiency of power circuits still needs to be improved. Currently, the connection between the internal substrate and the external lead post of the power circuit module is achieved by using wires. This connection method requires multiple steps such as wire cutting, tinning, shaping, and soldering, and requires manual operation, resulting in low production efficiency, poor manufacturability, and unsuitability for mass production. Utility Model Content

[0004] The purpose of this utility model is to provide an external lead connector for the internal circuit of a power electronic module, thereby changing the original connector structure and solving the above-mentioned problems.

[0005] To address the aforementioned problems in the existing technology, the technical solution adopted by this utility model is as follows:

[0006] An internal external lead connector for a power electronic module includes: a connector body, the connector body including an inner connecting end and an outer connecting end, the outer connecting end being provided with a connecting structure.

[0007] Since the external connector needs to connect to the external lead post, the connection structure is designed to be compatible with the external lead post, so that the contact area between the external connector and the external lead post is larger.

[0008] Furthermore, the connector body has a U-shaped structure. The connector body is a metal sheet that is bent to obtain the required U-shaped structure. The structure of the connector body is determined by the position of the substrate solder pads and the external lead posts.

[0009] Furthermore, the inner connection end matches the pads on the module substrate, and the connection structure is a "U"-shaped notch or a circular hole. The "U"-shaped notch matches the diameter of the outer lead post. The "U"-shaped notch of the outer connection end covers 3 / 4 of the circumference of the outer lead post. The connector body is made of oxygen-free copper, and the surface of the connector body is plated with a tin-lead layer. The connector body material can be oxygen-free copper with a tin-lead plating. Alternatively, the connection structure can also use a connection hole, the diameter of which matches the outer lead post. Both connection holes and "U"-shaped notches are designed for proper adaptation to the connection post.

[0010] The beneficial effects of this utility model are as follows: This utility model uses prefabricated internal external lead connectors of the power electronic module to achieve electrical connection between the power circuit module substrate and the external leads, realizing current transmission of the power circuit module. Compared with wire connection, using this internal external lead connector reduces the processes of wire unwinding, tinning, forming, and soldering. The internal external lead connector can be automatically mounted and reflow soldered along with surface mount components, optimizing the manufacturability design of the product and significantly improving the production efficiency of the power circuit module. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0012] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0013] Figure 3 This is a connection diagram of the present invention.

[0014] In the diagram: 1-Connector body; 2-Inner connection end; 3-Outer connection end; 4-Solder pad; 5-Outer lead post. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and reference numerals.

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] Example 1:

[0021] like Figure 1 and 3 As shown, an internal external lead connector for a power electronic module includes: a connector body 1, which includes an inner connecting end 2 and an outer connecting end 3, the outer connecting end 3 having a U-shaped notch. The connector is pre-formed into a U-shape using oxygen-free copper. One end of the connector has a semi-circular notch that matches the external lead post 5, and the other end has a rectangular planar structure that matches the solder pad 4. The surface of the connector is tin-lead plated to facilitate highly reliable soldering. The cross-sectional area of ​​the connector is 0.5 mm². 2 (2mm*0.25mm) A certain type of power circuit module achieves a current of 10A per lead.

[0022] Example 2:

[0023] like Figure 2 As shown, an internal external lead connector for a power electronic module includes: a connector body 1, which includes an inner connecting end 2 and an outer connecting end 3, the outer connecting end 3 having a connecting hole. The connector is pre-formed into a U-shape from oxygen-free copper. One end of the connector has a circular hole matching the lead post, and the other end has a rectangular planar structure matching the solder pad. The surface of the connector is tin-lead plated to facilitate highly reliable soldering. The cross-sectional area of ​​the connector is 0.75 mm². 2 (2.5mm*0.3mm) A current of 15A per lead of a certain type of power circuit module was achieved.

[0024] Specific working principle: During connection, the connector body 1 is mounted together with the surface mount components of the power circuit module, and then reflow soldering is performed to form it in one step.

[0025] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.

Claims

1. A power electronic module internal external lead connection, characterized by, include: The connector body (1) includes an inner connecting end (2) and an outer connecting end (3), and the outer connecting end (3) is provided with a connecting structure; The connector body (1) has a "U" shaped structure, the connector body (1) is made of oxygen-free copper, and the surface of the connector body (1) is provided with a tin-lead layer. The inner connection end (2) is matched with the pad (4) of the module substrate. The connection structure is a "U" shaped notch. The "U" shaped notch is matched with the diameter of the outer lead post (5). The "U" shaped notch covers 3 / 4 of the circumference of the outer lead post (5).

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