CN108198901B - Low-power reworking method for MWT photovoltaic module - Google Patents
Low-power reworking method for MWT photovoltaic module Download PDFInfo
- Publication number
- CN108198901B CN108198901B CN201711399474.8A CN201711399474A CN108198901B CN 108198901 B CN108198901 B CN 108198901B CN 201711399474 A CN201711399474 A CN 201711399474A CN 108198901 B CN108198901 B CN 108198901B
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- Prior art keywords
- welding
- power
- junction box
- glue
- tweezers
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 37
- 239000003292 glue Substances 0.000 claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- 238000004382 potting Methods 0.000 claims abstract description 3
- 239000000565 sealant Substances 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000010200 validation analysis Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008439 repair process Effects 0.000 abstract description 5
- 238000002503 electroluminescence detection Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Images
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a low-power rework method of an MWT photovoltaic module, which comprises the following steps of: opening a rear cover of the junction box, and cleaning the potting adhesive in the junction box until four conductive block welding spots are leaked; melting tin by using an electric iron, coating the tin on a welding spot of the connecting box conductive block, re-welding the outgoing line to the welding spot of the connecting box conductive block by using tweezers, pressing the welding spot position by using the electric iron for welding, removing the electric iron after welding, continuing pressing the outgoing line by using the tweezers, and then, pulling back the outgoing line by using the tweezers to check whether the welding is firm; and (3) power testing: carrying out power test and EL test on the welded assembly, and checking whether the output power is close to the theoretical power and whether an EL image is normal; secondary glue pouring: and (5) pouring glue again in the glue pouring area of the junction box, and covering the rear cover of the junction box. The repair process is simple and convenient, and does not need to increase any cost; the repair can be 100% successful by the method, and the production and manufacturing cost is reduced.
Description
Technical Field
The invention relates to a photovoltaic module, in particular to a low-power processing method of the photovoltaic module.
Background
When the MWT photovoltaic component is subjected to power test, the power of part of the components is obviously lower than the normal batch test power, the output power is far different from the theoretical power, the low-efficiency component is normal through a front EL detection image, and the rear EL detection image is abnormal. In the existing operation, the situation is often judged as a failure piece, and the failure piece is directly degraded or even scrapped, so that the cost is increased and the yield is influenced. Therefore, the influence factors with lower power are accurately found, a new repair process is found, the low-efficiency assembly reaches normal output power through retesting, the assembly loss is reduced, the effective utilization rate of the MWT battery assembly is improved, and the method is the most effective measure for reducing the production cost of the photovoltaic assembly.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a low-power rework method of an MWT photovoltaic module aiming at the defects of the prior art, which can improve the yield, reduce the cost and improve the efficiency.
The technical scheme is as follows: the invention provides a low-power rework method of an MWT photovoltaic module, which comprises the following steps:
(1) low power component type validation: if the former EL image is normal and the latter EL image is abnormal or does not display images, confirming that the lower power is caused by the welding looseness of the junction box;
(2) cleaning the pouring sealant of the junction box: opening a rear cover of the junction box, and cleaning the potting adhesive in the junction box until four conductive block welding spots are leaked;
(3) re-welding: melting tin by using an electric iron, coating the tin on a welding spot of the connecting box conductive block, re-welding the outgoing line to the welding spot of the connecting box conductive block by using tweezers, pressing the welding spot position by using the electric iron for welding, removing the electric iron after welding, continuing pressing the outgoing line by using the tweezers, and then, pulling back the outgoing line by using the tweezers to check whether the welding is firm;
(4) and (3) power testing: carrying out power test and EL test on the welded assembly, and checking whether the output power is close to the theoretical power and whether an EL image is normal;
(5) secondary glue pouring: and (5) pouring glue again in the glue pouring area of the junction box, and covering the rear cover of the junction box.
Further, in the step (2), the particles remained in the glue filling area are cleaned by a brush.
And (3) further, during glue filling in the step (5), glue is filled back and forth, left and right in the glue filling area of the junction box at a constant speed, so that the conductive block is completely submerged by the glue, and meanwhile, the height of the glue does not exceed the position of a black slot opening on the junction box.
Has the advantages that: 1. the repair process is simple and convenient, and no cost is increased;
2. the repair can be 100% successful by the method, and the production and manufacturing cost is reduced.
Drawings
Fig. 1 is a schematic structural view of a junction box.
Detailed Description
The technical solution of the present invention is described in detail below, but the scope of the present invention is not limited to the embodiments.
A low-power rework method for an MWT photovoltaic module is shown in a junction box plan view in fig. 1, the module power is low, an image is not displayed in EL detection, and the image is often caused by the fact that an outgoing line and a conductive block 2 on the junction box are welded insecurely, and the method specifically comprises the following operations:
1. low power component type validation
Finding out the reason of lower power according to the EL image, if the front EL image is normal, the rear EL image is abnormal, even the image is not displayed, and confirming that the lower power is caused by welding looseness of the junction box.
2. Cleaning pouring sealant for junction box
The rear cover of the junction box is opened, a small shovel for pouring sealant of the rectangular pouring sealant area 1 needs to be aligned with the vertical downward tangent line of the sealant during rework, then the sealant is slightly removed, the junction box is prevented from being scratched in the process until welding spots of the four conductive blocks 2 are leaked, and then the particles remained in the pouring sealant area 1 are cleaned up by a small brush.
3. Re-welding
Melting tin by using an electric iron, coating tin on the welding spot of the connecting box conducting block 2, re-welding the outgoing line to the welding spot of the connecting box conducting block 2 by using tweezers, pressing the welding spot position by using the electric iron for welding, moving the electric iron after 2S, continuously pressing the outgoing line by using the tweezers, and then, dialing back the outgoing line by using the tweezers to check whether the welding is firm.
4. Power testing
And carrying out power test and EL test on the secondary welded assembly, and checking whether the output power is close to the theoretical power and whether the EL image is normal.
5. Secondary glue pouring
When glue is poured again, the glue is poured back and forth and left and right in the glue pouring area 1 of the junction box at a constant speed, it is required to ensure that the glue completely submerges the charged body, the height of the glue does not exceed the position of the black slot opening on the junction box, the installation of the upper cover of the junction box is not affected, and the rear cover is covered well.
Claims (3)
1. A low-power rework method of an MWT photovoltaic module is characterized by comprising the following steps: the method comprises the following steps:
(1) low power component type validation: if the former EL image is normal and the latter EL image is abnormal or does not display images, confirming that the lower power is caused by the welding looseness of the junction box;
(2) cleaning the pouring sealant of the junction box: opening a rear cover of the junction box, and cleaning the potting adhesive in the junction box until four conductive block welding spots are leaked;
(3) re-welding: melting tin by using an electric iron, coating the tin on a welding spot of the connecting box conductive block, re-welding the outgoing line to the welding spot of the connecting box conductive block by using tweezers, pressing the welding spot position by using the electric iron for welding, removing the electric iron after welding, continuing pressing the outgoing line by using the tweezers, and then, pulling back the outgoing line by using the tweezers to check whether the welding is firm;
(4) and (3) power testing: carrying out power test and EL test on the welded assembly, and checking whether the output power is close to the theoretical power and whether an EL image is normal;
(5) secondary glue pouring: and (5) pouring glue again in the glue pouring area of the junction box, and covering the rear cover of the junction box.
2. The MWT photovoltaic module low power rework method of claim 1, characterized by: and (2) cleaning the particles remained in the glue pouring area by using a brush.
3. The MWT photovoltaic module low power rework method of claim 1, characterized by: and (5) during glue filling, performing glue filling back and forth and left and right at a constant speed in a glue filling area of the junction box, so that the conductive block is completely submerged by the glue, and meanwhile, the height of the glue does not exceed the position of a black slot opening on the junction box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711399474.8A CN108198901B (en) | 2017-12-22 | 2017-12-22 | Low-power reworking method for MWT photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711399474.8A CN108198901B (en) | 2017-12-22 | 2017-12-22 | Low-power reworking method for MWT photovoltaic module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108198901A CN108198901A (en) | 2018-06-22 |
| CN108198901B true CN108198901B (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711399474.8A Active CN108198901B (en) | 2017-12-22 | 2017-12-22 | Low-power reworking method for MWT photovoltaic module |
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| Country | Link |
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| CN (1) | CN108198901B (en) |
Citations (6)
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| CN203509297U (en) * | 2013-09-16 | 2014-04-02 | 宁波市创源光伏科技有限公司 | Automatic welding machine for junction box |
| KR101707716B1 (en) * | 2014-10-22 | 2017-02-17 | 양지혁 | Solar module having double layers structure and method for manufacturing therof |
| CN204760406U (en) * | 2015-05-29 | 2015-11-11 | 中电投西安太阳能电力有限公司 | Solar module lead -out wire cutting device |
| CN205195656U (en) * | 2015-11-03 | 2016-04-27 | 晋能清洁能源科技有限公司 | Split type terminal box photovoltaic module EL tests auxiliary fixtures |
| CN205762457U (en) * | 2016-05-15 | 2016-12-07 | 青海聚能电力有限公司 | A kind of solar battery component junction box is reprocessed and is used removing glue cutter |
| CN206519633U (en) * | 2017-02-28 | 2017-09-26 | 江苏东昇光伏科技有限公司 | A kind of solar photovoltaic assembly lead-out wire welder |
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2017
- 2017-12-22 CN CN201711399474.8A patent/CN108198901B/en active Active
Patent Citations (6)
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|---|---|---|---|---|
| CN102569529A (en) * | 2012-02-24 | 2012-07-11 | 常州天合光能有限公司 | EL (Eletroluminescent) testing general tool of solar cell module |
| CN102593254A (en) * | 2012-02-28 | 2012-07-18 | 天津力神电池股份有限公司 | Semi-flexible packaging method of crystalline silicon battery and photovoltaic component prepared by using method |
| CN105895739A (en) * | 2016-04-28 | 2016-08-24 | 江苏林洋光伏科技有限公司 | Double-glass assembly manufacturing method |
| CN106656037A (en) * | 2016-09-19 | 2017-05-10 | 英利能源（中国）有限公司 | Photovoltaic assembly welding quality measurement device and method for performing quality detection by applying same |
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| CN108198901A (en) | 2018-06-22 |
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Address after: 214028 Xishi Road, Xinwu District, Wuxi City, Jiangsu Province Applicant after: Jiangsu Rituo Photovoltaic Technology Co., Ltd. Address before: 211800 No. 29 Buyue Road, Pukou Economic Development Zone, Nanjing City, Jiangsu Province Applicant before: Nanjing day care PV Polytron Technologies Inc |
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