CN201478299U - Power module electrode and power module - Google Patents
Power module electrode and power module Download PDFInfo
- Publication number
- CN201478299U CN201478299U CN 200920134405 CN200920134405U CN201478299U CN 201478299 U CN201478299 U CN 201478299U CN 200920134405 CN200920134405 CN 200920134405 CN 200920134405 U CN200920134405 U CN 200920134405U CN 201478299 U CN201478299 U CN 201478299U
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- Prior art keywords
- electrode
- power model
- power module
- circuit board
- model electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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Abstract
The utility model discloses a power module electrode and a power module. The power module electrode comprises a lead-out part, a connecting part in electric connection and welded fixation with a circuit board of the power module, and a bending part positioned between the lead-out part and the connecting part. The power module comprises a casing, a circuit board fixed inside the casing, and power module electrodes in electric connection with the circuit board, wherein at least one of the power module electrodes is provided with the structure. Therefore, as the power module electrode comprises the bending part at the middle part and the connecting part at the lower part, the bending part can exert the functions of buffering and shock resistance in the environment of vibration and reduce the mechanical stress, thereby ensuring the welding quality, prolonging the service life of the power module, and facilitating the repeated installation.
Description
Technical field
The utility model relates to the power model technical field, more particularly, relates to a kind of power model electrode and power model.
Background technology
In the prior art, main two kinds of the outbound course of the main electrode end of the IGBT inverted power modules such as (Insulated Gate Bipolar Transistor) of high pressure, big electric current: a kind of is that main electrode is imbedded plastic casing by injection molding way, between DBC (Direct Bonding Copper, pottery-copper bonding substrate) and described main electrode, be connected again with aluminum steel.Another kind is earlier main electrode to be directly welded on the DBC, by the mode of bending plastic casing is drawn in described main electrode bending then.
The defective of first kind of electrode deriving structure is, on DBC of the same area, the conveyance capacity of aluminum steel is compared with the main electrode that is made of copper and is differed greatly, and the difference of each solder joint place resistance causes the current unevenness weighing apparatus between the aluminum steel, current unevenness weighs and then causes local overheating, can cause aluminum steel to burn out when serious.In addition, the big electric current that passes through in aluminum steel can produce high electromagnetic field, because very approaching between each aluminum steel, the strong mechanical force that is caused by described high electromagnetic field produces between aluminum steel, thereby influences the reliability of module.And, also can produce stray inductance between the many aluminum steels, this stray inductance can produce the overvoltage pulse spike under certain condition and connect voltage drop, has not only increased the loss of switch, also can cause crest voltage to surpass the rated value of module simultaneously, cause the inefficacy of module.
The defective of second kind of electrode deriving structure is, during welding electrode, the contact area between DBC and the electrode is less on DBC, thereby the electrode solder side is also less relatively.In addition, electrode to be welded is long more, the corresponding difficult more making of weld jig, the also difficult more control of the welding quality between electrode and the DBC.And cause easily in the bending process that solder joint is loosening, electrode loosening even come off, influence the long-term reliability of module.The welding power module also is unfavorable for repeatedly installing by this way, because repeatedly external force may cause electrode loosening, causes that module lost efficacy.And, the electrode that adopts this mode to weld, the consistency of its welding position is bad, for the bigger module of electrode position deviation, when described plastic casing and electrode assembling, electrode can be subjected to a long-term stress, and this stress not only can cause shorten the useful life of power model, and can influence the outward appearance of power model.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of power model electrode, and it can improve the reliability that electrode connects.
Another technical problem to be solved in the utility model is to provide a kind of power model, and it has above-mentioned electrode.
For the utility model power model electrode, above-mentioned technical problem is solved like this: a kind of power model electrode is provided, comprises extension, be electrically connected and weld with the power module circuit plate and be fixedly coupled part and bending part between described extension and described coupling part.
For the utility model power model, above-mentioned technical problem is solved like this: a kind of power model is provided, comprise shell, be fixed in the circuit board in the described shell, the power model electrode that is electrically connected with described circuit board, at least one has above-mentioned structure in the described power model electrode.
Like this, because described power model electrode comprises the bending part at middle part and the coupling part of bottom, described bending part is in the environment of vibrations, can play the effect of buffering antidetonation, reduced mechanical stress, thereby assurance welding quality, and the useful life of having improved power model, and be beneficial to repeatedly installation.Because power model does not need to weld aluminum steel, also increase the overcurrent capability of electrode, and avoided CURRENT DISTRIBUTION inhomogeneous, and the negative effects of passing through in the aluminum steel such as high electromagnetic field that big electric current produced.
Description of drawings
Fig. 1 is the partial schematic sectional view of the utility model power model one preferred embodiment;
Fig. 2 be embodiment illustrated in fig. 1 in the master of the second power model electrode when combining with circuit board and main electrode look schematic diagram;
Fig. 3 be embodiment illustrated in fig. 1 in the master of the second power model electrode look schematic diagram.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Please refer to Fig. 1 and Fig. 2, be a preferred embodiment of the utility model power model, narration only shows the part relevant with present embodiment for convenience.This power model comprises shell 1, be fixed in circuit board (being DBC) 2 in the described shell 1, by the main electrode 3 that described shell 1 is fixed and is electrically connected with described circuit board 2, also comprise the second power model electrode 4 that at least one is electrically connected with described circuit board 2.
Below said structure is further described in detail.
Please in conjunction with reference Fig. 3, the described second power model electrode 4 comprises extension 41, be electrically connected and weld with described circuit board 2 and be fixedly coupled part 43 and the bending part 42 between described extension 41 and coupling part 43.Like this, because the described second power model electrode 4 comprises the bending part 42 at middle part and the coupling part 43 of bottom, described bending part 42 is in the environment of vibrations, can play the effect of buffering antidetonation, reduced mechanical stress, thereby assurance welding quality, and the useful life of having improved power model, and be beneficial to repeatedly installation.Owing to do not need to weld aluminum steel, also increase the overcurrent capability of electrode, and avoided in the prior art CURRENT DISTRIBUTION inhomogeneous, and the negative effects of passing through in the aluminum steel such as high electromagnetic field that big electric current produced.
Please in conjunction with reference Fig. 2, in the present embodiment, described main electrode 3 is electrically connected with described circuit board 2 by the described second power model electrode 4.Specific practice is, the inner of described main electrode 3 is connected with described extension 41, and the coupling part 43 of the described second power model electrode 4 is electrically connected with described circuit board.Certainly, also can make the extension 41 of the described second power model electrode 4 extend described shell 1, thereby can make that the described second power model electrode 4 replaces described main electrode 3 and use as electrode separately.In addition, also the described second power model electrode 4 can be applied between the electrode and electrode of power model, electrode and other circuit board etc. is located, to realize the buffering antidetonation, to have reduced mechanical stress, thereby the assurance welding quality, and improve the purpose in the useful life of power model.
The described second power model electrode 4 is formed by the plate-shape metal bending, and its cross section is S-shaped.Described coupling part 43 is tabular and contacts and weld fixing with 2 of described circuit boards.Described extension 41 is tabular and contacts and weld fixing with the inner face of described main electrode 3.Because the area of the extension 41 of the second power model electrode 4 and coupling part 43 is bigger in the present embodiment, can realize firm welding during welding, has solved the various technical problems that prior art ran into.Because the space around the extension 41 is comparatively open, therefore, in the present embodiment, the area of extension 41 is greater than the area of coupling part 43, thereby can improve the welding quality between itself and the main electrode 3.Because the described second power model electrode 4 is formed by the plate-shape metal bending, so its thickness, width can be selected according to size that flows through electric current and electrode length, its height and radian can determine by the distance of drawing between main electrode 3 and the circuit board 2, thereby provide convenience for the design of electrode.Because the length of the second power model electrode 4 will be lacked much with respect to the electrode of directly drawing by bending in the prior art, thus the design of the weld jig of being more convenient for and making, and the welding quality of pad also can correspondingly improve.In addition, in the present embodiment, 42 1 roughly S-shaped bend unit 9 of described bending part (promptly the second power model electrode 4 is removed and is flat extension 41 and coupling part 43).Certainly, described bend unit can also be c-shaped,＜shape or semicircle etc., quantity also can be more than one.
Described shell 1 comprises base 11 and loam cake 12, makes by the insulation plastic material.Wherein said main electrode 3 by preforming be injection-moulded in loam cake 12 with in.Described base 11 is fixedlyed connected with circuit board 2.
During production, by injection molding way described loam cake 12 is fixed together with main electrode 3 earlier.And after the copper soleplate of the coupling part 43 of the described second power model electrode 4 and DBC (circuit board 2) welds, the loam cake 12 of the band main electrode 3 of prior injection formed and the base 11 that has the DBC and the second power model electrode 4 are installed (please refer to Fig. 1), extension 41 is overlapped with the inner of main electrode 3, and electricity consumption network iron gets final product the inner welding of described extension 41 with described main electrode 3 then.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (7)
1. power model electrode is characterized in that: comprise extension, be electrically connected and weld with the power module circuit plate and be fixedly coupled part and the bending part between described extension and described coupling part.
2. power model electrode as claimed in claim 1 is characterized in that: the cross section of described power model electrode is S-shaped, and is formed by the plate-shape metal bending.
3. power model electrode as claimed in claim 2 is characterized in that: described coupling part is tabular, and it contacts and weld fixing with described power module circuit plate face.
4. power model electrode as claimed in claim 1 is characterized in that: described bending part comprises that at least one is S-shaped, C shape,＜shape or semicircular bend unit.
5. power model, comprise shell, be fixed in the circuit board in the described shell, at least one power model electrode that is electrically connected with described circuit board, it is characterized in that: at least one has as any described structure of claim 1 to 4 in the described power model electrode.
6. power model as claimed in claim 5, it is characterized in that: described power model electrode comprises the main electrode of fixing and being electrically connected with described circuit board by described shell, also comprise the second power model electrode that at least one is electrically connected with described circuit board, the inner of described main electrode is connected with described extension, and the coupling part of the described second power model electrode is electrically connected with described circuit board.
7. power model electrode as claimed in claim 6 is characterized in that: described extension is tabular, and it contacts and weld fixing with the inner face of described main electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920134405 CN201478299U (en) | 2009-07-30 | 2009-07-30 | Power module electrode and power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920134405 CN201478299U (en) | 2009-07-30 | 2009-07-30 | Power module electrode and power module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201478299U true CN201478299U (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920134405 Expired - Lifetime CN201478299U (en) | 2009-07-30 | 2009-07-30 | Power module electrode and power module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201478299U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760714A (en) * | 2012-07-27 | 2012-10-31 | 西安永电电气有限责任公司 | Electrode structure and IGBT (Insulated Gate Bipolar Translator) module adopting same |
| CN103066042A (en) * | 2012-12-31 | 2013-04-24 | 江苏宏微科技股份有限公司 | Connection structure of power module electrode terminals |
| CN103633124A (en) * | 2012-08-21 | 2014-03-12 | 西安永电电气有限责任公司 | Electrode used for power semiconductor device |
| CN103811441A (en) * | 2014-02-26 | 2014-05-21 | 西安永电电气有限责任公司 | Contact electrode structure for flat-plate crimped IGBT (Insulated Gate Bipolar Translator) module |
| CN103824827A (en) * | 2012-11-16 | 2014-05-28 | 台达电子企业管理（上海）有限公司 | Packaging module, packaging terminal and manufacturing method thereof |
| CN104332445A (en) * | 2013-07-22 | 2015-02-04 | 西安永电电气有限责任公司 | Fixing device for IGBT module packaging structure |
-
2009
- 2009-07-30 CN CN 200920134405 patent/CN201478299U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760714A (en) * | 2012-07-27 | 2012-10-31 | 西安永电电气有限责任公司 | Electrode structure and IGBT (Insulated Gate Bipolar Translator) module adopting same |
| CN102760714B (en) * | 2012-07-27 | 2015-08-19 | 西安永电电气有限责任公司 | Electrode structure and apply the IGBT module of this electrode |
| CN103633124A (en) * | 2012-08-21 | 2014-03-12 | 西安永电电气有限责任公司 | Electrode used for power semiconductor device |
| CN103824827A (en) * | 2012-11-16 | 2014-05-28 | 台达电子企业管理（上海）有限公司 | Packaging module, packaging terminal and manufacturing method thereof |
| CN103066042A (en) * | 2012-12-31 | 2013-04-24 | 江苏宏微科技股份有限公司 | Connection structure of power module electrode terminals |
| CN103066042B (en) * | 2012-12-31 | 2015-07-15 | 江苏宏微科技股份有限公司 | Connection structure of power module electrode terminals |
| CN104332445A (en) * | 2013-07-22 | 2015-02-04 | 西安永电电气有限责任公司 | Fixing device for IGBT module packaging structure |
| CN103811441A (en) * | 2014-02-26 | 2014-05-21 | 西安永电电气有限责任公司 | Contact electrode structure for flat-plate crimped IGBT (Insulated Gate Bipolar Translator) module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen BYD Microelectronics Co., Ltd. Assignor: Biyadi Co., Ltd. Contract record no.: 2011440020324 Denomination of utility model: Power module electrode and power module Granted publication date: 20100519 License type: Exclusive License Record date: 20110901 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |