CN219370796U

CN219370796U - IGBT absorption capacitor lead-out soldering lug and IGBT absorption capacitor

Info

Publication number: CN219370796U
Application number: CN202320262971.8U
Authority: CN
Inventors: 彭海红; 李金洲
Original assignee: SICHUAN ZHONGXING ELECTRONIC CO Ltd
Current assignee: SICHUAN ZHONGXING ELECTRONIC CO Ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-07-18
Anticipated expiration: 2033-02-20

Abstract

The utility model relates to the technical field of capacitors, in particular to an IGBT absorption capacitor lead-out soldering lug and an IGBT absorption capacitor, wherein the soldering lug comprises a soldering lug body, one side of the soldering lug body is a soldering terminal connected with an electrode terminal of a capacitor core, and the other end of the soldering lug body is a lead-out terminal; the leading-out end comprises a first bending part which is bent relative to the first direction of the soldering lug body and a second bending part which is bent outwards relative to the first bending part, and a reinforcing rib structure is arranged on the second bending part. According to the IGBT absorption capacitor lead-out soldering lug and the IGBT absorption capacitor, the reinforcing rib structure is arranged at the bending part of the soldering lug, so that the soldering lug is provided with the ribs, the stress point of the soldering lug is increased, the vibration resistance of the soldering lug is enhanced, and the stability of the two-pole soldering lug is effectively improved.

Description

IGBT absorption capacitor lead-out soldering lug and IGBT absorption capacitor

Technical Field

The utility model relates to the technical field of capacitors, in particular to an IGBT absorption capacitance lead-out soldering lug and an IGBT absorption capacitance.

Background

At present, the IGBT absorption capacitor is led out by adopting a two-pole soldering lug type structure, and the basic structure is as follows: firstly, winding a metallized film to form a core with proper size, then attaching metal spraying powder to two ends of the core, welding a welding lug at two ends of the core to serve as a positive electrode and a negative electrode of a capacitor, then filling the welded core into a shell, and finally pouring epoxy resin for sealing.

Along with the design of the IGBT absorption capacitor, the size is bigger and bigger, and the anti-vibration capability of the tin-plated red copper material adopted by the soldering lug is poorer, in addition, the design of the bending part of the soldering lug of the traditional IGBT absorption capacitor has few points of force, and when the volume of a product is bigger, the two-pole soldering lug of the IGBT absorption capacitor is extremely easy to deform.

Disclosure of Invention

The utility model aims to provide an IGBT absorption capacitor lead-out soldering lug and an IGBT absorption capacitor, wherein the soldering lug is provided with ribs by making a reinforcing rib structure at the bending part of the soldering lug, so that the stress point of the soldering lug is increased, the vibration resistance of the soldering lug is enhanced, the stability of the two-pole soldering lug is improved, and the problem that the two-pole soldering lug pointed out in the background art is extremely easy to deform is solved.

The embodiment of the utility model is realized by the following technical scheme: the IGBT absorption capacitor lead-out soldering lug comprises a soldering lug body, wherein the soldering lug body comprises a lead-out end and a soldering end connected with an electrode end of a capacitor core;

the leading-out end comprises a first bending part which is bent relative to the first direction of the soldering lug body and a second bending part which is bent outwards relative to the first bending part, and a reinforcing rib structure is arranged on the second bending part.

According to a preferred embodiment, the reinforcing rib structure comprises N triangular grooves formed in the second bending portion, wherein N is a natural number greater than or equal to 1.

According to a preferred embodiment, the N triangular grooves are distributed from the center of the bending line of the second bending portion to both sides.

According to a preferred embodiment, the second bending portion is provided with an elliptical ring.

According to a preferred embodiment, the welding end comprises a third bending part bent relative to the second direction of the welding tab body, and the third bending part consists of a transition section and an electrode lead connected below the transition section.

According to a preferred embodiment, the third bending part is provided with two electrode leads corresponding to each capacitor core, and the electrode leads are arranged on two sides of the electrode leading-out end of the capacitor core.

According to a preferred embodiment, the electrode lead has a width smaller than the width of the lead-out terminal.

According to a preferred embodiment, a clamping block is arranged at the back of the first bending part.

According to a preferred embodiment, the soldering lug is made of tin-plated red copper.

The utility model also provides an IGBT absorption capacitor which is applied to the leading-out soldering lug, and comprises an anode soldering lug and a cathode soldering lug, wherein the anode soldering lug and the cathode soldering lug are overlapped, and an insulating sheet is arranged between the anode soldering lug and the cathode soldering lug;

the welding end of the positive electrode welding lug extends to the positive end of each capacitor core in the absorption capacitor, and the welding end of the negative electrode welding lug extends to the negative end of each capacitor core in the absorption capacitor.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects: according to the IGBT absorption capacitor lead-out soldering lug and the IGBT absorption capacitor, the reinforcing rib structure is arranged at the bending part of the soldering lug, so that the soldering lug is provided with the ribs, the stress point of the soldering lug is increased, the vibration resistance of the soldering lug is enhanced, and the stability of the two-pole soldering lug is effectively improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a lead tab according to embodiment 1 of the present utility model;

fig. 2 is a top view of the lead tab provided in embodiment 1 of the present utility model;

fig. 3 is a bottom view of the lead tab provided in embodiment 1 of the present utility model;

FIG. 4 is a front view of the lead tab provided in embodiment 1 of the present utility model;

FIG. 5 is a rear view of the lead tab provided in embodiment 1 of the present utility model;

FIG. 6 is a left side view of the lead tab provided in embodiment 1 of the present utility model;

FIG. 7 is a right side view of the lead tab provided in embodiment 1 of the present utility model;

fig. 8 is a schematic structural diagram of an IGBT absorption capacitor according to embodiment 1 of the present utility model;

icon: 1-welding end, 101-transition section, 102-electrode lead, 2-leading-out end, 201-first bending part, 202-second bending part, 203-triangle groove, 204-elliptical ring, 205-fixture block, 3-positive electrode welding tab, 4-negative electrode welding tab, 5-insulating sheet and 6-capacitor core.

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. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Example 1

As shown in fig. 1, 2, 3, 4, 5, 6 and 7, the embodiment provides an IGBT absorption capacitor lead-out soldering lug, which comprises a soldering lug body, and is characterized in that the soldering lug body comprises a lead-out end 2 and a soldering end 1 connected with an electrode end of a capacitor core 6, and the soldering lug is made of tin-plated red copper.

The leading-out end 2 comprises a first bending part 201 which is bent relative to the soldering lug body in a first direction, and a second bending part 202 which is bent outwards relative to the first bending part 201, wherein a reinforcing rib structure is arranged on the second bending part 202, and an elliptical ring 204 is further arranged on the second bending part 202.

In one implementation manner of this embodiment, the reinforcing rib structure includes N triangular grooves 203 formed on the second bending portion 202, where N is a natural number greater than or equal to 1; it should be noted that the triangular groove 203 is a preferred embodiment, and the structure of the stiffener is not particularly limited herein. Preferably, the N triangular grooves 203 are distributed to two sides from the center of the bending line of the second bending portion 202; in the present embodiment, the number of the triangular grooves 203 is 1, and the triangular grooves are located at the center of the bending line of the second bending portion 202, so that the stress points of the soldering lug are increased by applying the mechanical principle of triangle stability, thereby enhancing the vibration resistance of the soldering lug.

Further, the welding end 1 includes a third bending portion bent in the second direction relative to the tab body, and the third bending portion is composed of a transition section 101 and an electrode lead 102 connected below the transition section 101. In one implementation manner of this embodiment, the third bending portion is provided with two electrode leads 102 corresponding to each capacitor core 6, and the electrode leads 102 are arranged at two sides of the electrode lead-out end 2 of the capacitor core 6; the width of the electrode lead 102 is smaller than the width of the lead-out terminal 2. In a straight implementation of the present embodiment, the first direction and the second direction are opposite directions of the vertical direction.

Further, in order to facilitate the installation and fixation of the soldering lug, a clamping block 205 is provided at the back of the first bending portion 201, and as described with reference to fig. 8, the clamping block 205 is adapted to the housing of the IGBT absorption capacitor.

In summary, according to the IGBT absorption capacitor lead-out soldering lug and the IGBT absorption capacitor provided by the utility model, the soldering lug is provided with the ribs by making the reinforcing rib structure at the bending part of the soldering lug, so that the stress point of the soldering lug is increased, the vibration resistance of the soldering lug is enhanced, and the stability of the bipolar soldering lug is effectively improved.

Example 2

Referring to fig. 8, an embodiment of the present utility model provides an IGBT absorption capacitor, which is applied to the lead-out tab described in embodiment 1, including two lead-out tabs, one of which serves as the positive electrode tab 3 and the other as the negative electrode tab 4, and the positive electrode tab 3 and the negative electrode tab 4 are overlapped with an insulating sheet 5 provided therebetween.

Further, the welding end 1 of the positive electrode tab 3 extends to the positive end of each capacitor core 6 in the absorption capacitor, and the welding end 1 of the negative electrode tab 4 extends to the negative end of each capacitor core 6 in the absorption capacitor.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An IGBT absorption capacitor lead-out soldering lug comprises a soldering lug body, and is characterized in that the soldering lug body comprises a lead-out end (2) and a soldering end (1) connected with an electrode end of a capacitor core (6);

the leading-out end (2) comprises a first bending part (201) which is bent relative to the soldering lug body in a first direction, and a second bending part (202) which is bent outwards relative to the first bending part (201), wherein a reinforcing rib structure is arranged on the second bending part (202).

2. The IGBT absorbing capacity lead-out tab according to claim 1, wherein the reinforcing rib structure includes N triangular grooves (203) formed in the second bent portion (202), N being a natural number of 1 or more.

3. The IGBT absorbing capacitance lead-out tab according to claim 2, wherein the N triangular grooves (203) are distributed from the center of the bending line of the second bending portion (202) to both sides.

4. The IGBT absorbing capacitor lead-out tab according to claim 1, wherein the second bent portion (202) is provided with an elliptical ring (204).

5. The IGBT absorption capacitance lead-out tab according to any one of claims 1 to 4, characterized in that the welding terminal (1) comprises a third fold bent with respect to the second direction of the tab body, the third fold consisting of a transition section (101) and an electrode lead (102) connected below the transition section (101).

6. The IGBT absorbing capacitor lead-out tab according to claim 5, wherein the third bending portion is provided with two electrode leads (102) corresponding to each capacitor core (6), and the electrode leads (102) are arranged on both sides of the electrode lead-out terminal (2) of the capacitor core (6).

7. The IGBT-absorption-capacitance lead-out tab according to claim 6, wherein the width of the electrode lead (102) is smaller than the width of the lead-out terminal (2).

8. The IGBT absorption capacitance lead-out tab according to claim 1, wherein a latch (205) is provided at the back of the first folded portion (201).

9. The IGBT absorbing capacitance lead-out tab of claim 1 wherein the tab is tin plated red copper.

10. An IGBT absorption capacitor applied to the lead-out tab according to any one of claims 1 to 9, comprising a positive electrode tab (3) and a negative electrode tab (4), the positive electrode tab (3) and the negative electrode tab (4) being arranged in overlapping relationship with an insulating sheet (5) therebetween;

the welding end (1) of the positive electrode welding lug (3) extends to the positive electrode end of each capacitor core (6) in the absorption capacitor, and the welding end (1) of the negative electrode welding lug (4) extends to the negative electrode end of each capacitor core (6) in the absorption capacitor.