CN202957090U - MOV (metal oxide varistor) voltage-sensitive lightning prevention sheet - Google Patents
MOV (metal oxide varistor) voltage-sensitive lightning prevention sheet Download PDFInfo
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- CN202957090U CN202957090U CN 201220643616 CN201220643616U CN202957090U CN 202957090 U CN202957090 U CN 202957090U CN 201220643616 CN201220643616 CN 201220643616 CN 201220643616 U CN201220643616 U CN 201220643616U CN 202957090 U CN202957090 U CN 202957090U
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- lightning prevention
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Abstract
The utility model relates to a MOV (metal oxide varistor) voltage-sensitive lightning prevention sheet. The MOV voltage-sensitive lightning prevention sheet comprises a MOV sheet, a positive electrode sheet, a negative electrode sheet, two outgoing wires and an outer package layer, wherein each of the outgoing wires includes an annular welding part; the positive electrode sheet and the negative electrode sheet are respectively arranged on two side surfaces of the MOV sheet; the two outgoing wires are respectively welded on the surface of one of the electrode sheets through the annular welding part; and the outer package layer covers the MOV sheet, the positive and the negative electrode sheets and the annular welding parts. The MOV voltage-sensitive lightning prevention sheet is characterized in that the cross section of the annular welding part is provided with a linear bottom edge. The annular welding parts keep surface contact with the bottom surfaces of the electrode sheets by designing the bottom edge of the cross section of the annular welding parts to be a linear edge, so that on one hand, solder joint connection is sufficient after welding, on the other hand, the contact area between the annular welding parts and the electrode sheets is greatly increased due to surface contact. Accordingly, solder joints are difficult to fall off when a large current flows through the lightning prevention sheet instantaneously, thereby greatly improving the safety performance of the MOV voltage-sensitive lightning prevention sheet.
Description
Technical field
The utility model relates to a kind of electronic component, relates in particular to the pressure-sensitive lightning protection sheet of a kind of MOV.
Background technology
The pressure-sensitive lightning protection sheet of MOV (metal oxide resistance; ZnO for example) be the core parts of surge protector (SPD); the C level that power-supply system lightning protection and overvoltage protection are used and B level SPD are very high for the through-current capacity index of 8/20us impulse current; substantially at 10-15KA, therefore of crucial importance as the safety guarantee of the pressure-sensitive lightning protection sheet of core component MOV of SPD.
The pressure-sensitive lightning protection sheet of MOV generally comprises MOV sheet, positive and negative two electrode slices, two lead-out wires and outsourcing sealing, article two, lead-out wire all has an annular weld part, positive and negative two electrode slices are separately positioned on the two sides of MOV sheet, article two, lead-out wire is welded on the surface of one of them electrode slice by the annular weld part respectively, and the outsourcing sealing is coated on the outside of MOV sheet, positive and negative electrode sheet, annular weld part.Two above-mentioned positive and negative electrode sheets generally adopt copper electrode or silver electrode.
At present, because the annular weld part is generally that circular lead-out wire directly is coiled into by cross section, welding by often occurring that solder joint connects inadequate problem, and because cross section is circular, weld part is the line contact with contacting of electrode surface, and the contact area of weld part and electrode surface is less, when moment is passed through larger electric current, solder joint easily comes off, and security performance is lower.
Summary of the invention
The technical problems to be solved in the utility model is to provide the pressure-sensitive lightning protection sheet of a kind of MOV, and the security performance of the pressure-sensitive lightning protection sheet of this MOV is better.The technical scheme adopted is as follows:
The pressure-sensitive lightning protection sheet of a kind of MOV, comprise MOV sheet, positive and negative two electrode slices, two lead-out wires and outsourcing sealing, article two, lead-out wire all has an annular weld part, positive and negative two electrode slices are separately positioned on the two sides of MOV sheet, article two, lead-out wire is welded on the surface of one of them electrode slice by the annular weld part respectively, the outsourcing sealing is coated on the outside of MOV sheet, positive and negative electrode sheet, annular weld part, it is characterized in that: the base of the cross section of described annular weld part is straight line.
The base of the cross section of annular weld part is straight line, be that annular solder section is flat, its bottom surface contacted with electrode slice is plane, and annular solder section is the face contact with contacting of electrode slice, and one side makes the solder joint after welding connect more abundant, on the other hand, due to the face contact, the contact area of annular solder section and electrode slice increases considerably, when moment is passed through larger electric current, the solder joint difficult drop-off, increase substantially the pressure-sensitive lightning protection sheet of this MOV security performance.
Weld part is welded on the surface of electrode, can adopt following method:
(1), an annular tin sheet is steeped in scaling powder;
(2), annular tin sheet is put into to the centre of electrode;
(3), the annular solder section of lead-out wire is laminated on annular tin sheet and alignment;
(4), putting into reflow ovens is welded.
As preferred version of the present utility model, described annular solder section is made by zinc-plated copper sheet.Annular solder section adopts zinc-plated copper sheet, makes lead-out wire both keep good electric conductivity, when welding, is more prone to again, and solder joint connects more abundant.
The utility model compared with prior art, has following advantage:
The base of the cross section by the annular weld part is set to straight line, be that the bottom surface that annular solder section contacts with electrode slice is plane, annular solder section is the face contact with contacting of electrode slice, it is more abundant that one side makes the solder joint after welding connect, on the other hand, and due to the face contact, the contact area of annular solder section and electrode increases considerably, when moment is passed through larger electric current, the solder joint difficult drop-off, increase substantially the pressure-sensitive lightning protection sheet of this MOV security performance.
The accompanying drawing explanation
Fig. 1 is the structural representation of the utility model preferred implementation;
Fig. 2 is the profile of Fig. 1 along A-A.
Embodiment
Below in conjunction with accompanying drawing and preferred implementation of the present utility model, be described further.
As depicted in figs. 1 and 2, the pressure-sensitive lightning protection sheet of this MOV, comprise MOV sheet 1, positive and negative two electrode slices 2, two lead-out wires 3 and outsourcing sealings 4; Article two, lead-out wire 3 all has an annular weld part 5; Positive and negative two electrode slices 2 are separately positioned on the two sides of MOV sheet 1; Article two, lead-out wire 3 is welded on the surface of one of them electrode slice 2 by annular weld part 5 respectively; Outsourcing sealing 4 is coated on the outside of MOV sheet 1, positive and negative electrode sheet 2, annular weld part 5; The base of the cross section of annular weld part 5 is straight line 6; Annular solder section 5 is made by zinc-plated copper sheet.
Because the base of the cross section of annular weld part 5 is straight line 6, be that annular solder section is flat, its bottom surface contacted with electrode slice 2 is plane, and annular solder section 5 is the face contact with contacting of electrode slice 2, and one side makes the solder joint after welding connect more abundant, on the other hand, due to the face contact, annular solder section 5 increases considerably with the contact area of electrode slice 2, when moment is passed through larger electric current, the solder joint difficult drop-off, increase substantially the pressure-sensitive lightning protection sheet of this MOV security performance.
In addition; it should be noted that, the specific embodiment described in this specification, its each several part titles etc. can be different; allly according to the utility model patent, conceive equivalence or the simple change that described structure, feature and principle are done, be included in the protection range of the utility model patent.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection range of the present utility model.
Claims (2)
1. the pressure-sensitive lightning protection sheet of MOV, comprise MOV sheet, positive and negative two electrode slices, two lead-out wires and outsourcing sealing, article two, lead-out wire all has an annular weld part, positive and negative two electrode slices are separately positioned on the two sides of MOV sheet, article two, lead-out wire is welded on the surface of one of them electrode slice by the annular weld part respectively, the outsourcing sealing is coated on the outside of MOV sheet, positive and negative electrode sheet, annular weld part, it is characterized in that: the base of the cross section of described annular weld part is straight line.
2. the pressure-sensitive lightning protection sheet of MOV as claimed in claim 1 is characterized in that: described annular solder section is made by zinc-plated copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643616 CN202957090U (en) | 2012-11-29 | 2012-11-29 | MOV (metal oxide varistor) voltage-sensitive lightning prevention sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643616 CN202957090U (en) | 2012-11-29 | 2012-11-29 | MOV (metal oxide varistor) voltage-sensitive lightning prevention sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202957090U true CN202957090U (en) | 2013-05-29 |
Family
ID=48462650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220643616 Expired - Fee Related CN202957090U (en) | 2012-11-29 | 2012-11-29 | MOV (metal oxide varistor) voltage-sensitive lightning prevention sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202957090U (en) |
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2012
- 2012-11-29 CN CN 201220643616 patent/CN202957090U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20201129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |