CN101996774B - There is stack-type solid electrolytic capacitor and the manufacture method thereof of multi-spot welding structure - Google Patents
There is stack-type solid electrolytic capacitor and the manufacture method thereof of multi-spot welding structure Download PDFInfo
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- CN101996774B CN101996774B CN201010538432.XA CN201010538432A CN101996774B CN 101996774 B CN101996774 B CN 101996774B CN 201010538432 A CN201010538432 A CN 201010538432A CN 101996774 B CN101996774 B CN 101996774B
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Abstract
The present invention relates to a kind of stack-type solid electrolytic capacitor with multi-spot welding structure, it comprises at least one solid electrolytic capacitor unit, each solid electrolytic capacitor unit has an anode and a negative electrode, this anode has at least two welding regions, and each welding region forms solder joint by anode material melting; Wherein, the volume of the welding material on each welding region is all less than traditional single pad structural volume, and therefore during welding, the energy of required supply is less, can reduce the probability of the internal structure of distortion or bending this negative electrode of stress rupture caused.
Description
Technical field
The present invention relates to a kind of stack-type solid electrolytic capacitor and manufacture method thereof, is espespecially a kind of stack-type solid electrolytic capacitor and manufacture method thereof with multi-spot welding structure.
Background technology
Stack-type solid electrolytic capacitor is made up of several solid electrolytic capacitor unit, and the mutual storehouse of anode of solid electrolytic capacitor unit together.The mode that anode combines is had with rivet, welding etc.Traditional welding manner system forms the structure of single pad, in other words, the area of welding region can be substantially equal to the contact-making surface of adjacent two anodes, because the welding region area of the structure of single pad is larger, therefore the volume of the solder joint formed after anode material melting is also larger, therefore higher energy need be supplied during welding, thus easily make anode be out of shape or bend, and distortion or the bending stress caused also can be delivered on the negative electrode of solid electrolytic capacitor unit, the oxide skin(coating) being formed at cathode internal is damaged, make the performance degradation (namely leakage current increases) of this solid electrolytic capacitor.
Summary of the invention
The invention reside in and a kind of stack-type solid electrolytic capacitor and the manufacture method thereof with multi-spot welding structure are provided, the probability of the internal structure of anode distortion or the bending stress rupture negative electrode caused can be reduced.
In order to realize above-mentioned technique effect, the invention provides a kind of stack-type solid electrolytic capacitor with multi-spot welding structure, comprise at least one solid electrolytic capacitor unit, each solid electrolytic capacitor unit has an anode and a negative electrode, this anode has at least two welding regions, on each welding region by this anode material melting, solidify to form a solder joint.
In order to reach above-mentioned effect, the present invention more provides a kind of stack-type solid electrolytic capacitor manufacture method with multi-spot welding structure, its step is as follows: first, at least one solid electrolytic capacitor unit is provided, each those solid electrolytic capacitor unit has an anode and a negative electrode, and this anode is provided with at least two welding regions; Next, pass to welding current, can form the thermal welding of moment when welding current presses close to each welding region, this anode material is subject to high temperature and is melt into weld interface, then is solidified into this solder joint, so that this anode is mutually affixed.
The present invention has following effect: the volume of the welding material on each welding region is all less than the volume of the welding material of traditional single pad structure, therefore during welding, the energy of required supply is less, can reduce the probability of the internal structure of anode distortion or the bending stress rupture negative electrode caused.
Further understand feature of the present invention and technology contents for enable, below in conjunction with accompanying drawing, specific features of the present invention and technology contents are described in detail.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the stack-type solid electrolytic capacitor with multi-spot welding structure
Fig. 2 is the enlarged drawing of A part in Fig. 1;
Fig. 3-A is the vertical view of four welding regions of the stack-type solid electrolytic capacitor with multi-spot welding structure;
Fig. 3-B is the end view of four welding regions of the stack-type solid electrolytic capacitor with multi-spot welding structure;
Fig. 3-C is the vertical view of six welding regions of the stack-type solid electrolytic capacitor with multi-spot welding structure;
Fig. 3-D is the end view of six welding regions of the stack-type solid electrolytic capacitor with multi-spot welding structure
Fig. 4 is the schematic diagram of the solid electrolytic capacitor unit of the stack-type solid electrolytic capacitor with multi-spot welding structure;
Fig. 5 is the schematic diagram after the stack-type solid electrolytic capacitor with multi-spot welding structure coats solder;
Fig. 6 is the schematic diagram of the stack-type solid electrolytic capacitor with multi-spot welding structure when carrying out welding step.
10-electrolytic capacitor unit, 11-solder joint, 12-first conductor, 13-second conductor, 14-conduction rack, 101-sheet metal, 102-oxide skin(coating), 103-electroconductive polymer layer, 104-carbon paste, 105-insulating barrier, P-anode, N-negative electrode, W-welding region.
Embodiment
As shown in Figure 1 or 2, a kind of stack-type solid electrolytic capacitor with multi-spot welding structure, it comprises several solid electrolytic capacitor unit 10, each solid electrolytic capacitor unit 10 has an an anode P and negative electrode N, this anode P has at least two welding region W, each welding region W is provided with a solder joint 11, and it is formed by the material of this anode P (as aluminium metal sheet) melting and solidification; Wherein, the volume of this solder joint 11 on each welding region W is all less than the volume of traditional single pad structure, and therefore during welding, the energy of required supply is less, can reduce the probability of the internal structure of distortion or bending this negative electrode of the stress rupture N caused.
In addition, this anode P of each those solid electrolytic capacitor unit 1 is all electrically connected to one first conductor 12 and forms common anode; The negative electrode N of each solid electrolytic capacitor unit 1 is all electrically connected to the second conductor 13 and forms common cathode, and this first conductor 12 is connected by a conduction rack 14 with this second conductor 13, by the mode of mutually contacting, those solid electrolytic capacitor unit 1 can be made to have higher energy storage amount.In addition, this first conductor 12 is the terminal electrode of this anode P, and this second conductor 13 is the terminal electrode of this negative electrode N, and this two terminal electrode is connected by this conduction rack 14.
In addition, can a coated encapsulation unit in those solid electrolytic capacitor unit 1 peripheries, a part of (not shown) of this encapsulation unit also this conduction rack 14 coated, in other words, the some of this conduction rack 14 extends this encapsulation unit; This encapsulation unit can be an insulation and heat insulation resin.This stack-type solid electrolytic capacitor 1 with multi-spot welding structure can be used on circuit board maybe this first conductor 12 and this second conductor 13 to be bent inwards and to lean against the bottom of this encapsulation unit, is welded on circuit board in SMT mode.
In addition, as shown in Figure 2, solder joint 11 takes shape between any two adjacent this anode P, or between this first conductor 12 and this anode P adjacent with this first conductor 12.The distribution scenario of solder joint 11 of the present invention can have multiple enforcement aspect, such as: as Fig. 3-A, Fig. 3-B, the anode P of each solid electrolytic capacitor unit has four welding region W, each welding region W is provided with a solder joint 11, or as Fig. 3-C, Fig. 3-D, the anode P of each solid electrolytic capacitor unit has six welding region W, and each welding region W is provided with a solder joint 11.
As shown in Figure 4, solid electrolytic capacitor unit 10 all has the electroconductive polymer layer 103 of a side and the carbon paste 104 of this electroconductive polymer layer coated of oxide skin(coating) 102, this oxide skin(coating) 102 coated of a sheet metal 101, this sheet metal 101 coated.Wherein, this sheet metal 101 forms this anode P, and this carbon paste 104 forms this negative electrode N.The partial outer face of the oxide skin(coating) 102 of each solid electrolytic capacitor unit 10 has the insulating barrier 105 that surrounds into a circle, this insulating barrier 105 insulate in order to make this anode P of each solid electrolytic capacitor unit and this negative electrode N.
As shown in Figure 5, Figure 6, the stack-type solid electrolytic capacitor with multi-spot welding structure can be shaping by resistance welded mode, concrete manufacturing step is as follows: first, at least one solid electrolytic capacitor unit 10 is provided, each solid electrolytic capacitor unit 10 has an an anode P and negative electrode N, and this anode P is provided with at least two welding region W; Next, carry out welding step, pass to welding current, as the electric current of 1000 to 100000 amperes, can form the thermal welding of moment when welding current presses close to each welding region W, this anode material is subject to high temperature and is melt into weld interface 111, then is solidified into this solder joint 11(as Fig. 5); This solder joint 11 can in order to be solidly connected with each other this anode P.Or, also can before welding, each welding region W coats auxiliary solder, such as utilisation point glue machine coats tin or its alloy of tin on each welding region W point of anode, due to the molten point about 170 to 250 DEG C of tin or its alloy of tin, use lower bonding power stress can be reduced, the destruction of high heat to equivalent series resistance can be lowered thus, the setting of tin or its alloy gluing layer of tin is equivalent to anode interrupter, the destruction of leakage current LC can be reduced, also contribute to the welding of anode, avoid the generation of dry joint.
In sum, the volume of this solder joint 11 that the present invention has on each welding region W of the stack-type solid electrolytic capacitor of multi-spot welding structure is all less than the volume of this solder joint 11 of traditional single pad structure, therefore during welding, the energy of required supply is less, can reduce the probability of the internal structure of distortion or bending this negative electrode of the stress rupture N caused.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. have a stack-type solid electrolytic capacitor for multi-spot welding structure, comprise at least one solid electrolytic capacitor unit, each solid electrolytic capacitor unit has an anode and a negative electrode, it is characterized in that, this anode is provided with at least two welding regions; Next, pass to welding current, can form the thermal welding of moment when welding current presses close to each welding region, this anode material is subject to high temperature and is melt into weld interface, then is solidified into solder joint, so that this anode is mutually affixed.
2. the stack-type solid electrolytic capacitor with multi-spot welding structure according to claim 1, is characterized in that, the anode of each solid electrolytic capacitor unit is electrically connected to the first conductor and forms common anode.
3. the stack-type solid electrolytic capacitor with multi-spot welding structure according to claim 2, is characterized in that, the negative electrode of each solid electrolytic capacitor unit is electrically connected to the second conductor and forms common cathode.
4. the stack-type solid electrolytic capacitor with multi-spot welding structure according to claim 3, is characterized in that, comprises the conduction rack that connects this first conductor and this second conductor.
5. the stack-type solid electrolytic capacitor with multi-spot welding structure according to claim 1, is characterized in that, comprises the encapsulation unit of a coated solid electrolytic capacitor unit.
6. the stack-type solid electrolytic capacitor with multi-spot welding structure according to claim 1, it is characterized in that, each solid electrolytic capacitor unit has a sheet metal, the oxide skin(coating) of this sheet metal coated, the electroconductive polymer layer of this oxide skin(coating) one side coated and the carbon paste of this electroconductive polymer layer coated.
7. there is a manufacture method for the stack-type solid electrolytic capacitor of multi-spot welding structure, comprise the following steps:
There is provided at least one solid electrolytic capacitor unit, each solid electrolytic capacitor unit has an anode and a negative electrode, and this anode is provided with at least two welding regions; Next, pass to welding current, can form the thermal welding of moment when welding current presses close to each welding region, this anode material is subject to high temperature and is melt into weld interface, then is solidified into solder joint, so that this anode is mutually affixed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010538432.XA CN101996774B (en) | 2010-11-09 | 2010-11-09 | There is stack-type solid electrolytic capacitor and the manufacture method thereof of multi-spot welding structure |
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| CN201010538432.XA CN101996774B (en) | 2010-11-09 | 2010-11-09 | There is stack-type solid electrolytic capacitor and the manufacture method thereof of multi-spot welding structure |
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| CN101996774A CN101996774A (en) | 2011-03-30 |
| CN101996774B true CN101996774B (en) | 2016-01-27 |
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| TWI626670B (en) * | 2016-05-20 | 2018-06-11 | 鈺邦科技股份有限公司 | Stacked-type solid electrolytic capacitor capable of increasing welding effect and manufacturing method of the same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1484262A (en) * | 2002-08-28 | 2004-03-24 | Nec东金株式会社 | Solid electrolytic capacitor |
| CN1658345A (en) * | 2004-02-20 | 2005-08-24 | Nec东金株式会社 | Solid electrolytic capacitor, transmission-line device, method of producing the same, and composite electronic component using the same |
| CN101226828A (en) * | 2007-01-17 | 2008-07-23 | 财团法人工业技术研究院 | Solid electrolytic capacitor and conductor rack thereof |
| CN101290832A (en) * | 2007-03-19 | 2008-10-22 | 松下电器产业株式会社 | Solid electrolytic capacitor |
| CN101329950A (en) * | 2008-07-14 | 2008-12-24 | 钰邦电子（无锡）有限公司 | Multilayer superimposition solid electrolytic capacitor |
| CN101335131A (en) * | 2008-07-14 | 2008-12-31 | 钰邦电子（无锡）有限公司 | Manufacturing method for improved chip type electrolytic capacitor |
| CN201893244U (en) * | 2010-11-09 | 2011-07-06 | 钰邦电子（无锡）有限公司 | Stacked type solid electrolytic capacitor with multi-spot welding structure |
-
2010
- 2010-11-09 CN CN201010538432.XA patent/CN101996774B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1484262A (en) * | 2002-08-28 | 2004-03-24 | Nec东金株式会社 | Solid electrolytic capacitor |
| CN1658345A (en) * | 2004-02-20 | 2005-08-24 | Nec东金株式会社 | Solid electrolytic capacitor, transmission-line device, method of producing the same, and composite electronic component using the same |
| CN101226828A (en) * | 2007-01-17 | 2008-07-23 | 财团法人工业技术研究院 | Solid electrolytic capacitor and conductor rack thereof |
| CN101290832A (en) * | 2007-03-19 | 2008-10-22 | 松下电器产业株式会社 | Solid electrolytic capacitor |
| CN101329950A (en) * | 2008-07-14 | 2008-12-24 | 钰邦电子（无锡）有限公司 | Multilayer superimposition solid electrolytic capacitor |
| CN101335131A (en) * | 2008-07-14 | 2008-12-31 | 钰邦电子（无锡）有限公司 | Manufacturing method for improved chip type electrolytic capacitor |
| CN201893244U (en) * | 2010-11-09 | 2011-07-06 | 钰邦电子（无锡）有限公司 | Stacked type solid electrolytic capacitor with multi-spot welding structure |
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| CN101996774A (en) | 2011-03-30 |
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