CN112713217A - Curing process of large-size laminated cell - Google Patents
Curing process of large-size laminated cell Download PDFInfo
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- CN112713217A CN112713217A CN202011603594.7A CN202011603594A CN112713217A CN 112713217 A CN112713217 A CN 112713217A CN 202011603594 A CN202011603594 A CN 202011603594A CN 112713217 A CN112713217 A CN 112713217A
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- temperature
- curing process
- stage
- conductive adhesive
- battery piece
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000008569 process Effects 0.000 title claims abstract description 49
- 239000000853 adhesive Substances 0.000 claims abstract description 22
- 230000001070 adhesive effect Effects 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000010583 slow cooling Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 238000005336 cracking Methods 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 8
- 239000012634 fragment Substances 0.000 abstract description 5
- 230000008439 repair process Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
Abstract
The invention provides a curing process of a large-size laminated cell, which comprises the following steps: a rapid heating stage, wherein the rapid heating stage is used for enabling the conductive adhesive to reach a curing state; the constant temperature stage is used for enabling the conductive adhesive to reach a stable state; and a slow cooling stage, wherein the slow cooling stage is used for slowly cooling the conductive adhesive. The invention has the beneficial effects that the problems of quality problems of hidden cracking, broken pieces and the like of the battery piece caused by the fact that the temperature rise process reaches higher temperature, the temperature reduction time is too short, and the switching of the high-temperature state and the low-temperature state is too fast in the curing process of the laminated battery piece in the prior art are effectively solved, the rate of finished products is reduced, the used temperature is higher, and the energy consumption is higher, and the curing process of the large-size laminated battery piece, which reduces the quality problems of hidden cracking, broken pieces and the like of the battery piece, improves the fragment rate and the repair rate of the battery piece, improves the rate of finished products, and reduces the energy consumption.
Description
Technical Field
The invention belongs to the technical field of solar cell manufacturing, and particularly relates to a curing process of a large-size laminated cell.
Background
In the manufacturing process of the large-size laminated battery piece, the battery piece needs to be cured for connecting the positive electrode and the negative electrode of the battery piece. The curing process of the battery piece in the prior art usually adopts the following modes: in a curing furnace, the conductive adhesive connected with the battery piece is quickly heated to play a role in connecting the positive electrode and the negative electrode of the battery piece, and then the temperature of the battery piece is kept constant for a period of time, and then the battery piece is quickly cooled. This approach has the disadvantages of: due to the fact that the temperature rise process reaches high temperature, the temperature reduction time is too short, and the high-low temperature state is switched too fast, the quality problems of hidden cracking, fragment breaking and the like of the battery piece can be caused, the rate of finished products is reduced, the use temperature is high, and energy consumption is large.
Therefore, in order to improve the yield of the battery piece after the battery piece is cured and reduce the energy consumption, the battery piece curing process in the prior art needs to be improved, the quality problems of hidden cracking, breaking and the like of the battery piece are reduced, the fragment rate and the repair rate of the battery piece are improved, the yield is improved, and the energy consumption is reduced.
Disclosure of Invention
The invention provides a curing process of a large-size laminated tile battery piece, which aims to solve the problems that the quality problems of hidden cracks, warping, breaking and the like of the battery piece can be caused due to the fact that the temperature rise process reaches higher temperature, the temperature reduction time is too short, and the high-low temperature state is switched too fast in the curing process of the conventional laminated tile battery piece in the background art, the rate of finished products is reduced, the used temperature is higher, and the energy consumption is higher.
In order to solve the technical problems, the invention adopts the following technical scheme: a curing process for large-size shingled cells, the process comprising the following stages:
a rapid heating stage, wherein the rapid heating stage is used for enabling the conductive adhesive to reach a curing state;
the constant temperature stage is used for enabling the conductive adhesive to reach a stable state;
and a slow cooling stage, wherein the slow cooling stage is used for slowly cooling the conductive adhesive.
Further, the rapid temperature rise stage is that the conductive adhesive rises from 0 ℃ to a first temperature.
Further, the first temperature is 140 ℃ to 160 ℃.
Further, the time required by the rapid heating-up stage is 5-10 seconds.
Further, the constant temperature stage is that the conductive adhesive is kept constant at the first temperature for a certain time.
Further, the time required for the constant temperature stage is 70-80 seconds.
Further, the slow cooling stage is that the conductive adhesive is cooled from the first temperature to a second temperature.
Further, the second temperature is 20 ℃ to 40 ℃.
Further, the time required by the slow cooling stage is 40-50 seconds.
Further, the process is performed in a vacuum environment.
Compared with the traditional battery piece curing process, the curing process for the large-size laminated battery piece reduces the highest curing temperature in the heating process, slows down the speed of the cooling process, solves the problems of hidden cracking, broken pieces and the like of the battery piece caused by the fact that the heating process reaches higher temperature, the cooling time is too short, and the high-low temperature state is switched too fast, reduces the rate of finished products, has higher use temperature and higher energy consumption, reduces the quality problems of hidden cracking, broken pieces and the like of the battery piece, improves the rate of finished products and reduces the energy consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a curing process according to one embodiment of the present invention;
FIG. 2 is a graph comparing temperature profiles of a curing process according to an embodiment of the present invention and a conventional curing process;
in the figure:
l1: the temperature change curve of the curing process of the embodiment of the invention;
l2: temperature change curve of the traditional curing process.
Detailed Description
The invention is further illustrated by the following examples and figures.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, the present invention provides a curing process for a large-size laminated cell, which comprises the following steps:
a rapid heating stage, wherein the rapid heating stage is used for enabling the conductive adhesive to reach a curing stage;
the constant temperature stage is used for enabling the conductive adhesive to reach a stable state;
and a slow cooling stage, wherein the slow cooling stage is used for slowly cooling the conductive adhesive.
Specifically, the rapid heating stage is to heat the conductive adhesive from 0 ℃ to a first temperature.
Specifically, the first temperature is 140 ℃ to 160 ℃.
Specifically, the time required for the rapid temperature rise stage is 5 to 10 seconds.
Specifically, the constant temperature stage is to keep the conductive adhesive at a constant temperature for a certain time at a first temperature.
Specifically, the time required for the constant temperature stage is 70 to 80 seconds.
Specifically, the slow cooling stage is to cool the conductive adhesive from the first temperature to a second temperature.
Specifically, the second temperature is 20 ℃ to 40 ℃.
Specifically, the time required for the slow cooling stage is 40-50 seconds.
Specifically, the process is carried out in a vacuum environment.
Compared with the traditional curing process, the curing process disclosed by the embodiment of the invention has the advantages that the highest curing temperature in the temperature rising process is reduced, the temperature rising rate is increased, the temperature reduction rate is slowed down, and the problems of hidden cracking, fragment breakage and the like caused by too fast temperature change of the battery piece are avoided.
As shown in fig. 2, which is a temperature curve comparison graph of the curing process of the embodiment of the present invention and the conventional curing process, L1 is a temperature variation curve of the curing process of the embodiment of the present invention, L2 is a temperature variation curve of the conventional curing process, according to the temperature variation difference between L1 and L2, two groups of shingled battery cells in the same batch are selected for the experiment, the curing process group of the embodiment is used as an experiment group, the conventional curing process group is used as a control group, and the curing treatment is respectively performed on the two groups, wherein the conditions of the experiment group and the control group are as follows:
fast temperature rise stage of experimental group: heating from 0 ℃ to 150 ℃, wherein the heating time is 10 seconds, and the heating rate is 15 ℃/s;
and (3) a temperature rise stage of a control group: heating from 0 ℃ to 190 ℃, wherein the heating time is 20 seconds, and the heating rate is 9.5 ℃/s;
experiment group constant temperature stage: keeping the temperature at 150 ℃ for 80 seconds;
control group constant temperature stage: keeping the temperature at 190 ℃ for 90 seconds;
slow cooling phase of experimental group: reducing the temperature from 150 ℃ to 30 ℃, wherein the temperature reduction time is 50 seconds, and the temperature reduction rate is 2.4 ℃/s;
and (3) performing rapid cooling stage of the control group: reducing the temperature from 190 ℃ to 30 ℃, wherein the temperature reduction time is 30 seconds, and the temperature reduction rate is 5.3 ℃/s;
after the curing treatment, the proportion of the cell which causes quality problems in the experiment group and the control group in the total amount of the cell subjected to the curing treatment is respectively counted, and the list is as follows:
the data in the table show that the ratio of the quality problems of the experimental group to the control group is reduced by 2.14%, the quality problems of the solidified cell, such as hidden cracks, warping, breakage and the like, are effectively improved, and the fragment rate and the repair rate of the cell are reduced.
The invention has the following advantages and beneficial effects: compared with the traditional battery piece curing process, the curing process for the large-size laminated battery piece reduces the highest curing temperature in the heating process, slows down the speed of the cooling process, solves the problems of hidden cracking, warping, breaking and the like of the battery piece caused by the fact that the heating process reaches higher temperature, the cooling time is too short, and the switching of high and low temperature states is too fast, reduces the rate of finished products, has higher use temperature and higher energy consumption, reduces the quality problems of hidden cracking, breaking and the like of the battery piece, improves the rate of broken pieces and the repair rate of the battery piece, improves the rate of finished products, and reduces the energy consumption.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A curing process for large-size laminated battery plates is characterized by comprising the following stages:
a rapid heating stage, wherein the rapid heating stage is used for enabling the conductive adhesive to reach a curing state;
the constant temperature stage is used for enabling the conductive adhesive to reach a stable state;
and a slow cooling stage, wherein the slow cooling stage is used for slowly cooling the conductive adhesive.
2. The curing process of a large-size laminated cell as claimed in claim 1, wherein: the rapid heating stage is that the conductive adhesive is heated from 0 ℃ to a first temperature.
3. The curing process of a large-size laminated cell as claimed in claim 2, wherein: the first temperature is 140 ℃ to 160 ℃.
4. The curing process of a large-size laminated cell as claimed in claim 3, wherein: the time required by the rapid heating stage is 5-10 seconds.
5. The curing process for large-size shingled battery pieces according to any of claims 2 to 4, wherein: the constant temperature stage is to keep the conductive adhesive at the first temperature for a certain time.
6. The curing process of a large-size laminated cell as claimed in claim 5, wherein: the time required for the constant temperature stage is 70-80 seconds.
7. The curing process of a large-size laminated cell according to claim 2 or 6, wherein: the slow cooling stage is that the conductive adhesive is cooled from the first temperature to a second temperature.
8. The curing process for large-size laminated battery pieces as claimed in claim 7, wherein: the second temperature is 20 ℃ to 40 ℃.
9. The curing process for large-size laminated battery pieces as claimed in claim 8, wherein: the time required by the slow cooling stage is 40-50 seconds.
10. A process for curing a large-sized shingled cell sheet according to claims 1-4, 6, and 9, wherein: the process is carried out in a vacuum environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011603594.7A CN112713217A (en) | 2020-12-29 | 2020-12-29 | Curing process of large-size laminated cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011603594.7A CN112713217A (en) | 2020-12-29 | 2020-12-29 | Curing process of large-size laminated cell |
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| Publication Number | Publication Date |
|---|---|
| CN112713217A true CN112713217A (en) | 2021-04-27 |
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| CN202011603594.7A Pending CN112713217A (en) | 2020-12-29 | 2020-12-29 | Curing process of large-size laminated cell |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011077455A (en) * | 2009-10-01 | 2011-04-14 | Nec Toshiba Space Systems Ltd | Solar cell panel, electrostatic charging suppressing method for solar cell panel, and photovoltaic power generator to be mounted on artificial satellite |
| CN108899387A (en) * | 2018-07-03 | 2018-11-27 | 彭延岩 | A kind of connection method for the conducting resinl and solar battery sheet that can be converted to glue film online immediately |
| CN109679552A (en) * | 2018-11-16 | 2019-04-26 | 云南科威液态金属谷研发有限公司 | A kind of liquid metal conducting resinl and its application |
| CN110370778A (en) * | 2019-08-22 | 2019-10-25 | 东方环晟光伏（江苏）有限公司 | A kind of laminater and laminating method applied to large scale battery component |
| WO2020052748A1 (en) * | 2018-09-12 | 2020-03-19 | Applied Materials Italia S.R.L. | Apparatus for processing a solar cell arrangement including a plurality of overlapping solar cell pieces, heating device for heating the same, method for processing the same |
-
2020
- 2020-12-29 CN CN202011603594.7A patent/CN112713217A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011077455A (en) * | 2009-10-01 | 2011-04-14 | Nec Toshiba Space Systems Ltd | Solar cell panel, electrostatic charging suppressing method for solar cell panel, and photovoltaic power generator to be mounted on artificial satellite |
| CN108899387A (en) * | 2018-07-03 | 2018-11-27 | 彭延岩 | A kind of connection method for the conducting resinl and solar battery sheet that can be converted to glue film online immediately |
| WO2020052748A1 (en) * | 2018-09-12 | 2020-03-19 | Applied Materials Italia S.R.L. | Apparatus for processing a solar cell arrangement including a plurality of overlapping solar cell pieces, heating device for heating the same, method for processing the same |
| CN109679552A (en) * | 2018-11-16 | 2019-04-26 | 云南科威液态金属谷研发有限公司 | A kind of liquid metal conducting resinl and its application |
| CN110370778A (en) * | 2019-08-22 | 2019-10-25 | 东方环晟光伏（江苏）有限公司 | A kind of laminater and laminating method applied to large scale battery component |
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Application publication date: 20210427 |