CN207933556U - A kind of polycrystalline cast ingot cover board - Google Patents
A kind of polycrystalline cast ingot cover board Download PDFInfo
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- CN207933556U CN207933556U CN201721465873.5U CN201721465873U CN207933556U CN 207933556 U CN207933556 U CN 207933556U CN 201721465873 U CN201721465873 U CN 201721465873U CN 207933556 U CN207933556 U CN 207933556U
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- cover board
- graphite
- cast ingot
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- polycrystalline cast
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Abstract
This application discloses a kind of polycrystalline cast ingot cover boards,The cover board is the graphite cover board that thickness is not less than 10mm,Original relatively thin carbon fiber cover board is substituted by the way that thicker graphite cover board can be made to,As long as thickness is more than 10 millimeters,The enough normal uses of its intensity,In use more resistant to high temperature and cold and hot stress variation,It is not easy to crack,The service life is longer,And graphite cover board is easier to make for following process transformation,Such as on the cover board punching or regional area skiving,The graphite can be, but not limited to the graphite to be processed in the way of isostatic pressed,Its intensity is higher,In addition,The effect of cover board is in addition to preventing impurity from falling into,Also a part of heat radiation can be obstructed,It is practical consistent with the barriering effect of carbon fiber cover board of 5mm to 8mm thickness using the graphite cover board of 20mm thickness,Graphite cover board is thicker,Its service life is also higher.Above-mentioned polycrystalline cast ingot cover board can avoid buckling deformations and cracking damage, and can reduce production cost.
Description
Technical field
The utility model is related to photovoltaic cell technical fields, more specifically to a kind of polycrystalline cast ingot cover board.
Background technology
Polycrystalline ingot furnace is common crystalline silicon casting unit, includes mainly crucible, heater, heat-insulation cage and furnace chamber shell
Body, furnace chamber shell is interior to be arranged crucible, and crucible is placed on graphitic cooling block, and the carbon fibre cover for covering crucible is provided with above crucible
Plate, this carbon fiber cover board from top heater generally in 3-6cm or so, suffered temperature at 1500 DEG C or more, heated time compared with
It is long, it is easy to that buckling deformations occur during prolonged use, in turn results in cracking damage, use cost is high.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of polycrystalline cast ingot cover board, buckling deformations can be avoided
And cracking damage, and production cost can be reduced.
A kind of polycrystalline cast ingot cover board provided by the utility model, the cover board are the graphite cover board that thickness is not less than 10mm.
Preferably, in above-mentioned polycrystalline cast ingot cover board, the thickness of the cover board is not more than 40mm.
Preferably, in above-mentioned polycrystalline cast ingot cover board, the position close to four angles of the cover board is both provided with gas vent.
Preferably, in above-mentioned polycrystalline cast ingot cover board, the quantity of the gas vent is 4,8 or 12.
Preferably, in above-mentioned polycrystalline cast ingot cover board, the diameter range of the gas vent is 20 millimeters to 50 millimeters.
Preferably, in above-mentioned polycrystalline cast ingot cover board, the thickness in the local overcooling region of the cover board crosses cold-zone less than non-
The thickness in domain.
It can be seen from the above technical proposal that polycrystalline cast ingot cover board provided by the utility model, since the cover board is
Thickness is not less than the graphite cover board of 10mm, therefore can avoid buckling deformations and cracking damage, and can reduce production cost.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the schematic diagram of the first polycrystalline cast ingot cover board provided by the embodiments of the present application.
Specific implementation mode
The core concept of the utility model is to provide a kind of polycrystalline cast ingot cover board, can avoid buckling deformations and crack to damage
It is bad, and production cost can be reduced.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in FIG. 1, FIG. 1 is provided by the embodiments of the present application for the first polycrystalline cast ingot cover board provided by the embodiments of the present application
The schematic diagram of the first polycrystalline cast ingot cover board, the cover board 1 are the graphite cover board that thickness is not less than 10mm, can also from Fig. 1
Go out, the centre of this cover board 1 has air admission hole 2.
It should be noted that the embodiment is by changing cover plate materials, carbon fiber in the prior art being substituted by graphite,
Carbon fiber cover board is thicker and of high cost since manufacturing process problem cannot be done, and the present embodiment is thicker by that can be made to
Graphite cover board substitutes original relatively thin carbon fiber cover board, as long as thickness is more than 10 millimeters, the enough normal uses of intensity are using
In the process more resistant to high temperature and cold and hot stress variation, not easy to crack, the service life is longer, and graphite cover board is easier to make for
Following process is transformed, such as punching or regional area skiving on the cover board, which can be, but not limited to utilize isostatic pressed side
The graphite of formula processing, intensity is higher, in addition, the effect of cover board in addition to preventing impurity from falling into, can also obstruct a part of heat radiation,
It is practical consistent with the barriering effect of carbon fiber cover board of 5mm to 8mm thickness using the graphite cover board of 20mm thickness, it is also stated that
It is that graphite cover board is thicker, and service life is also higher.
It can be seen from the above technical proposal that the first polycrystalline cast ingot cover board that the embodiment of the present application is provided, by institute
It is the graphite cover board that thickness is not less than 10mm to state cover board, therefore can avoid buckling deformations and cracking damage, and can reduce life
Produce cost.
Second of polycrystalline cast ingot cover board provided by the embodiments of the present application is on the basis of the first above-mentioned polycrystalline cast ingot cover board
On, further include following technical characteristic：
The thickness of the cover board is not more than 40mm.
It should be noted why setting this upper limit, can be caused because if cover sheet thickness is more than 40mm
Cost is excessively high, and without this necessity, and weight bigger is not easy to carry.
The third polycrystalline cast ingot cover board provided by the embodiments of the present application is on the basis of the first above-mentioned polycrystalline cast ingot cover board
On, further include following technical characteristic：
It continues to refer to figure 1, the position close to four angles of the cover board 1 is both provided with gas vent 3.
Using the gas vent being arranged near each angle, the convection effects of atmosphere can be enhanced, and require these here
The position setting of gas vent will be relative to the central symmetry of cover board, to ensure that air-flow will not be adversely affected.
4th kind of polycrystalline cast ingot cover board provided by the embodiments of the present application, is on the basis of the third above-mentioned polycrystalline cast ingot cover board
On, further include following technical characteristic：
The quantity of the gas vent is 4,8 or 12.
That is, being provided with 1,2 or 3 gas vent near each angle, the quantity of gas vent more just has
There are better convection effects, the quantity of gas vent can be selected according to actual needs.
5th kind of polycrystalline cast ingot cover board provided by the embodiments of the present application is on the basis of above-mentioned 4th kind of polycrystalline cast ingot cover board
On, further include following technical characteristic：
The diameter range of the gas vent is 20 millimeters to 50 millimeters.
It should be noted that when needing more powerful exhaust effect, so that it may a certain in the diameter range to be arranged to
A larger value, and when exhaust effect that need not be more powerful, so that it may be arranged in the diameter range some is smaller
Value, be all to carry out selection according to actual needs.
6th kind of polycrystalline cast ingot cover board provided by the embodiments of the present application, be it is above-mentioned the first to the 5th kind of polycrystalline cast ingot lid
Further include following technical characteristic on the basis of plate：
Thickness of the thickness in the local overcooling region of the cover board less than non-supercooling region.
It should be noted that during actual ingot casting, may not ensure that each regional temperature is identical, this with
Many factors are related, and when using this graphite cover board when, just have preferably can processing characteristics, specifically, can sentence in advance
Break and which region for supercooling region, then the graphite skiving in these supercooling regions is enhanced into the heat radiation effect in the region accordingly
Fruit, to realize the thermal balance with other regions.
Said program and effect are illustrated with a specific example below：
The use of thickness is 20mm and the isostatic pressing formed graphite cover board of intermediate trepanning, the carbon of overall operation power and 6.5mm thickness
Fiber cover board is consistent, while silicon ingot head impurity ratio is 0.1%, and 0.12% is had dropped compared to the same period, in terms of slice, slice
Yield improves 0.13% percentage point.Normal carbon fiber cover board general service life is 12 months, and isostatic pressing formed graphite cover board uses
The time limit was up to 24 months.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (5)
1. a kind of polycrystalline cast ingot cover board, which is characterized in that the cover board is the graphite cover board that thickness is not less than 10mm, the cover board
Local overcooling region thickness less than it is non-supercooling region thickness.
2. polycrystalline cast ingot cover board according to claim 1, which is characterized in that the thickness of the cover board is not more than 40mm.
3. polycrystalline cast ingot cover board according to claim 1, which is characterized in that the position close to four angles of the cover board is equal
It is provided with gas vent.
4. polycrystalline cast ingot cover board according to claim 3, which is characterized in that the quantity of the gas vent be 4,8 or
12.
5. polycrystalline cast ingot cover board according to claim 4, which is characterized in that the diameter range of the gas vent is 20 millimeters
To 50 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721465873.5U CN207933556U (en) | 2017-11-06 | 2017-11-06 | A kind of polycrystalline cast ingot cover board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721465873.5U CN207933556U (en) | 2017-11-06 | 2017-11-06 | A kind of polycrystalline cast ingot cover board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207933556U true CN207933556U (en) | 2018-10-02 |
Family
ID=63644490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721465873.5U Active CN207933556U (en) | 2017-11-06 | 2017-11-06 | A kind of polycrystalline cast ingot cover board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207933556U (en) |
-
2017
- 2017-11-06 CN CN201721465873.5U patent/CN207933556U/en active Active
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