CN111883609A - Solar cell connecting method - Google Patents
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- CN111883609A CN111883609A CN201910300555.0A CN201910300555A CN111883609A CN 111883609 A CN111883609 A CN 111883609A CN 201910300555 A CN201910300555 A CN 201910300555A CN 111883609 A CN111883609 A CN 111883609A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 111
- 238000005520 cutting process Methods 0.000 claims abstract description 23
- 238000010248 power generation Methods 0.000 claims description 13
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 239000011733 molybdenum Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 4
- KTSFMFGEAAANTF-UHFFFAOYSA-N [Cu].[Se].[Se].[In] Chemical compound [Cu].[Se].[Se].[In] KTSFMFGEAAANTF-UHFFFAOYSA-N 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012946 outsourcing Methods 0.000 description 2
- 230000002000 scavenging effect Effects 0.000 description 2
- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- WILFBXOGIULNAF-UHFFFAOYSA-N copper sulfanylidenetin zinc Chemical compound [Sn]=S.[Zn].[Cu] WILFBXOGIULNAF-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H01L31/04—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 adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/14—Measuring as part of the manufacturing process for electrical parameters, e.g. resistance, deep-levels, CV, diffusions by electrical means
-
- 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
-
- 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 discloses a solar cell connecting method, which comprises the following steps: cutting the standardized battery pieces to obtain at least two battery pieces; testing the electrical parameters of the at least two battery pieces to obtain a first battery piece and a second battery piece, wherein the rated electrical parameter of the first battery piece is different from the testing electrical parameter, the difference value between the testing electrical parameter of the second battery piece and the testing electrical parameter of the first battery piece is not greater than a grading threshold value, and the grading threshold value is 2% of the smaller value of the testing electrical parameter of the first battery piece and the testing electrical parameter of the second battery piece; and electrically connecting the first battery piece with the second battery piece.
Description
Technical Field
The invention relates to the technical field of solar cells, in particular to a solar cell connecting method.
Background
The solar cell is a photoelectric semiconductor wafer which directly generates electricity by using sunlight. A Copper Indium Gallium Selenide (CIGS) cell is a solar cell with high conversion rate. At present, standard CIGS battery pieces which are delivered from factories are generally in a uniform size, and in order to meet different application requirements, the CIGS battery pieces in the uniform size are firstly cut into a plurality of non-standard battery pieces in different sizes, and then the non-standard battery pieces are spliced to manufacture solar batteries in different sizes and specifications.
As shown in fig. 1 and 2, the conventional standardized CIGS cell is electrically connected in parallel by connecting the cells having the same number of nodes and the same output voltage level, and the number of cell segments on each parallel branch is n; and connecting the battery plates with the same width L and the same output current level in series. The number of the battery pieces is the number of the sub-batteries contained in the battery pieces, and the width of the battery pieces is the width of the sub-batteries. The electrical parameters of the single sub-battery which is delivered from a factory are generally standard values, so that the electrical parameters of the battery piece can be calculated according to the number of the sub-batteries contained in the battery piece, namely the rated electrical parameters of the battery piece. The existing standardized battery plates are electrically connected by the battery plates with the same rated electrical parameter level.
In the case of the non-standardized battery piece subjected to the cutting and edge cleaning process, the original structure of the battery (especially the sub-battery at the edge position) may be changed during the cutting process of the battery piece, so that the no-load voltage or the short-circuit current of the battery piece after cutting is changed relative to the no-load voltage or the short-circuit current of the battery before cutting. If the connection is simply carried out according to the standard of the rated electrical parameters of the standardized battery pieces, namely, the battery pieces with the same number of sections are connected in parallel, the charging and discharging self-consumption phenomenon among the battery pieces can be caused due to the voltage difference among the battery pieces on the same parallel branch, the battery pieces with the same sub-battery width are connected in series, the output power can be obviously reduced due to the short-circuit current difference on the series branch, and the power of the battery formed by splicing the battery pieces is far smaller than the sum of the power of the battery pieces.
In addition, for the non-standardized battery piece obtained after cutting and edge cleaning, if a slightly damaged individual sub-battery is formed in the battery piece, the whole battery piece cannot be used with the battery piece at the same level due to the slight damage of the individual sub-battery, the battery piece needs to be cut into smaller battery pieces for reuse or scrapping, the utilization rate of the battery piece is reduced, and the production cost is improved.
Disclosure of Invention
In view of this, the present invention provides a method for connecting solar cells, which can increase the utilization rate of the solar cells, meet the requirements of various applications, and reduce the production cost of the solar cells.
In order to achieve the above object, the present invention provides a solar cell connecting method, comprising: cutting the standardized battery pieces to obtain at least two battery pieces; testing the electrical parameters of the at least two battery pieces to obtain a first battery piece and a second battery piece, wherein the rated electrical parameter of the first battery piece is different from the testing electrical parameter, the difference value between the testing electrical parameter of the second battery piece and the testing electrical parameter of the first battery piece is not greater than a grading threshold value, and the grading threshold value is 2% of the smaller value of the testing electrical parameter of the first battery piece and the testing electrical parameter of the second battery piece; and electrically connecting the first battery piece with the second battery piece.
Optionally, the test electrical parameter is a no-load voltage and the electrical connection is in parallel.
Optionally, the test electrical parameter is a short circuit current and the electrical connection is in series.
Optionally, the test electrical parameter is a no-load voltage, and the classification threshold is 2% of a smaller one of the test no-load voltage of the first cell and the test no-load voltage of the second cell.
Optionally, the test electrical parameter is a short-circuit current, and the classification threshold is 2% of a smaller value of the test short-circuit current of the first cell and the test short-circuit current of the second cell.
Optionally, the step of cutting the standardized cell piece into the first cell piece and the second cell piece includes:
removing the power generation layer of the standardized battery piece;
removing the molybdenum layer of the standardized battery piece;
and cutting the standardized battery piece.
Optionally, the width of the scavenging molybdenum layer is less than the width of the scavenging power generation layer.
Optionally, the width of the erase power generation layer is less than 22 mm.
Based on the above description, the solar cell connection method provided by the invention includes cutting a standardized cell to obtain at least two cells; and testing the electrical parameters of the at least two battery pieces to obtain a first battery piece and a second battery piece, wherein the rated electrical parameter of the first battery piece is different from the testing electrical parameter, the difference value between the testing electrical parameter of the second battery piece and the testing electrical parameter of the first battery piece is not greater than a grading threshold value, the grading threshold value is 2% of the smaller value of the testing electrical parameter of the first battery piece and the testing electrical parameter of the second battery piece, and the first battery piece is electrically connected with the second battery piece. According to the solar cell connection method, the charging and discharging self-consumption phenomenon among the cells caused by different electrical parameters on the same parallel branch can be avoided; and the output power of the battery plate unit on the series branch can be ensured, and various voltage requirements can be met. Therefore, the solar cell connecting method can improve the utilization rate of the solar cells and meet the requirement of diversified application, and the production cost of the solar cells can be reduced by adopting the solar cell connecting method provided by the invention.
Drawings
Fig. 1 is a schematic diagram of a parallel connection mode of solar cells according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a series connection of solar cells according to an embodiment of the present invention;
fig. 3 is a schematic step diagram of a solar cell connection method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
The solar cell connecting method provided by the embodiment of the invention comprises the steps of S100-S300.
And S100, cutting the standardized battery pieces to obtain at least two battery pieces.
In one embodiment, the standardized cell is a Copper Indium Gallium Selenide (CIGS) cell, and the step S100 may include the steps of:
and step S110, removing the power generation layer of the standardized battery piece.
The width of the cleaning power generation layer is less than 22 mm. The standardized battery pieces are required to be spliced after being removed and cut, and a splicing gap of 2mm-3mm is generated when the two battery pieces are spliced. Therefore, as long as the cut edge is not positioned at the outer edge after splicing, the width of the removed power generation layers is less than 22mm, and the distance between the spliced power generation layers can be ensured to be more than 11 mm. Therefore, the power loss of the standardized battery cell during the cutting process can be reduced.
And step S120, removing the molybdenum layer of the standardized battery piece.
The width of the removed molybdenum layer is smaller than that of the removed power generation layer, so that the molybdenum layers with certain widths can be reserved on two sides, and the bus bar is convenient to mount.
And S130, cutting the standardized battery pieces according to the requirement of rated electrical parameters to obtain at least two battery pieces.
The standardized battery plate refers to a battery plate with fixed size and rated electrical parameters when being shipped out of a factory, and the number of sub-batteries of the battery plate is also fixed. The electric parameters of the single sub-battery which leaves the factory are generally standard values, so that the corresponding number of the sub-batteries is selected according to the requirement of rated electric parameters, and the standardized battery pieces are cut to obtain at least two battery pieces.
And S200, testing electrical parameters of at least two battery pieces to obtain a first battery piece and a second battery piece. In one embodiment, step S200 is specifically: the method comprises the steps of testing at least two battery pieces to obtain testing electrical parameters, using the battery pieces with different rated electrical parameters and testing electrical parameters as first battery pieces, using the battery pieces with the difference value between the testing electrical parameters and the testing electrical parameters of the first battery pieces not larger than a grading threshold value as second battery pieces, and using the grading threshold value as 2% of the smaller value of the testing electrical parameters of the first battery pieces and the testing electrical parameters of the second battery pieces.
In one embodiment, step S200 is specifically: and superposing the rated electrical parameters of the sub-batteries which are not damaged in the battery pieces to be used as the test electrical parameters of the battery pieces, using the battery pieces with the rated electrical parameters different from the test electrical parameters as first battery pieces, and using the battery pieces with the difference value between the test electrical parameters and the test electrical parameters of the first battery pieces not larger than the grading threshold value as second battery pieces.
In one embodiment, the rated electrical parameter of the second cell is the same as the test electrical parameter, but in other embodiments, the rated electrical parameter of the second cell may be different from the test electrical parameter as long as the difference between the test electrical parameter of the second cell and the test electrical parameter of the first cell is not greater than the classification threshold. And selecting a cell with the rated electrical parameter different from the test electrical parameter as a first cell, and selecting a cell with the difference value between the test electrical parameter and the test electrical parameter of the first cell not greater than the grading threshold value as a second cell. The first battery piece can be a standardized battery piece or a non-standardized battery piece obtained by cutting and edge cleaning the standardized battery piece; the second cell can also be a standardized cell or a non-standardized cell obtained by cutting and edge cleaning the standardized cell, and the corresponding cell is selected according to the actual use requirement.
It is to be understood that the test point parameters are not limited to be obtained by testing, and since the battery sheet includes a plurality of sub-batteries independent of each other, the damaged battery sheet may cause a difference between the rated electrical parameter and the test electrical parameter when cutting, and therefore, in other embodiments, the rated electrical parameter of the sub-battery not damaged in the battery sheet may be superimposed as the test electrical parameter of the battery sheet.
And step S300, electrically connecting the first battery piece with the second battery piece. The electrical connection of the first cell piece and the second cell piece includes parallel connection, series connection and series-parallel connection, which are respectively described below.
In one embodiment, a difference between the test no-load voltage of the first cell piece and the test no-load voltage of the second cell piece is not greater than a classification threshold, and the step of electrically connecting the first cell piece and the second cell piece specifically includes: and connecting the first battery piece and the second battery piece in parallel. In this embodiment, the absolute value of the difference between the test no-load voltage of the first cell and the test no-load voltage of the second cell is not greater than the classification threshold, and the size of the classification threshold is 2% of the smaller value of the test no-load voltage of the first cell and the test no-load voltage of the second cell. And connecting the first cell and the second cell which are tested to have the same no-load voltage in parallel to form the solar cell. Therefore, the charging and discharging phenomena among the solar cells caused by different electrical parameters on the same parallel branch can be avoided, and the internal loss of the solar cells is reduced. Under the condition of the same conversion efficiency of the solar cell, the power loss of the solar cell can be reduced by adopting the test no-load voltage as the grading.
As shown in fig. 1, the solar cell is formed by connecting a plurality of cells with the same test no-load voltage level in parallel, and the test no-load voltage V of the cells on each parallel branchOC1、VOC2、VOCnAnd the battery plates are in the same level, namely the absolute value of the difference value between the test no-load voltages of the battery plates on each parallel branch is not greater than the grading threshold, and the grading threshold is 2% of the test no-load voltage of the battery plate with the minimum test no-load voltage value. Therefore, the self-consumption phenomenon of mutual charging and discharging between the battery pieces caused by voltage difference on the same parallel branch can be avoided; in addition, the sizes of the battery pieces with the same test no-load voltage level may have slight differences, and the size difference of each battery piece does not exceed the required range.
In one embodiment, the difference between the short-circuit current of the first cell and the short-circuit current of the second cell is not greater than the classification threshold, and the step of electrically connecting the first cell and the second cell specifically comprises: and connecting the first battery piece and the second battery piece in series. In this embodiment, the absolute value of the difference between the test short-circuit current of the first cell and the test short-circuit current of the second cell is not greater than the classification threshold, and the size of the classification threshold is 2% of the smaller value of the test short-circuit current of the first cell and the test short-circuit current of the second cell. Under the same conversion efficiency of the solar cell, the power loss of the solar cell can be reduced by adopting the test short-circuit current as the grading.
As shown in fig. 2, the solar cell is formed by connecting a plurality of cells with the same level of test short-circuit current in series, and the test short-circuit current I of the cells in each series branchSC1、ISC2、ISCnAnd the absolute value of the difference value between the testing short-circuit currents of the battery plates on each series branch is not greater than the grading threshold, and the grading threshold is 2% of the testing short-circuit current of the battery plate with the smallest testing short-circuit current value. Therefore, the output power of the solar cells can be ensured, and the number of the series connection of the cells can be adjusted according to different voltage requirements; in addition, the sizes of the battery pieces with the same level of test short-circuit current may have slight difference, and the size difference of each battery piece does not exceed the required range.
In one embodiment, the step of electrically connecting the first battery piece and the second battery piece may be to connect a plurality of battery pieces with the difference of the test electrical parameters not greater than the classification threshold in parallel and then in series, or connect a plurality of battery pieces with the difference of the test electrical parameters not greater than the classification threshold in series and then in parallel. And selecting a cell with the rated electrical parameter different from the test electrical parameter as a first cell, and selecting a cell with the difference value between the test electrical parameter and the test electrical parameter of the first cell not greater than the grading threshold value as a second cell. The number of the first battery pieces and the second battery pieces and the serial-parallel connection mode between the first battery pieces and the second battery pieces are selected according to the requirements of output electrical parameters of the solar battery pieces. According to the application requirements of the solar cells under different conditions, the first cells and the second cells in corresponding quantity are selected to be connected in series and in parallel, so that corresponding electrical parameters are output, and the diversity application requirements of the solar cells can be met.
In one embodiment, the solar cell sheet is a glass-based solar cell sheet. In this embodiment, the first cell piece and the second cell piece are both glass-based Copper Indium Gallium Selenide (CIGS) cell pieces. The glass-based Copper Indium Gallium Selenide (CIGS) cell has the advantages of strong light absorption capacity, good power generation stability and high conversion efficiency. Of course, in other embodiments, the power generation layer material may be selected from one of copper indium selenide, copper indium gallium selenide sulfide, copper zinc tin sulfide, and cadmium telluride. The first battery piece and the second battery piece are electrically connected in parallel and in series, and the parallel connection mode of the first battery piece and the second battery piece can avoid the charge-discharge self-consumption phenomenon between the first battery piece and the second battery piece caused by different electrical parameters on the same parallel branch; for the mode that the first battery piece is connected with the second battery piece in series, the output power of the solar battery piece can be ensured, and various voltage requirements can be met. In one embodiment, a cell having a rated electrical parameter different from the test electrical parameter is selected as a first cell, and a cell having a test electrical parameter that differs from the test electrical parameter of the first cell by no more than a classification threshold value is selected as a second cell. The first battery piece can be a standardized battery piece or a non-standardized battery piece obtained by cutting and edge cleaning the standardized battery piece; the second cell can also be a standardized cell or a non-standardized cell obtained by cutting and edge cleaning the standardized cell, and the corresponding cell is selected according to the actual use requirement. It is understood that the standardized battery piece refers to a battery piece which has fixed size and rated electrical parameters when being shipped from a factory, and the number of sub-batteries of the battery piece is also fixed. The electrical parameters of the single sub-battery which leaves the factory are generally standard values, so that the electrical parameters of the standardized battery piece, namely the rated electrical parameters of the standardized battery piece, can be calculated according to the number of the sub-batteries contained in the standardized battery piece.
When the non-standardized battery piece is obtained after the standardized battery piece is cut and edge-cleaned, the number of the required sub-batteries is determined according to the rated electrical parameters required by the non-standardized battery piece, however, the battery piece is damaged due to the limitation of the precision of the cutting edge-cleaning process, if the sub-batteries are damaged, the power of the sub-batteries is broken down or completely fails according to the damage degree, and the actual electrical parameters of the non-standardized battery piece, namely the test electrical parameters are different from the rated electrical parameters.
In one embodiment, the rated electrical parameter of the second cell is the same as the test electrical parameter, but in other embodiments, the rated electrical parameter of the second cell may be different from the test electrical parameter as long as the difference between the test electrical parameter of the second cell and the test electrical parameter of the first cell is not greater than the classification threshold.
According to different electric connection modes of the first battery piece and the second battery piece, the electric parameters are divided into no-load voltage and short-circuit current. When the first battery piece is connected with the second battery piece in parallel, the test electric parameters and the rated electric parameters refer to test no-load voltage and rated no-load voltage. When the first battery piece is connected with the second battery piece in series, the test electrical parameters and the rated electrical parameters refer to test short-circuit current and rated short-circuit current.
It is understood that step S100 may be omitted. The step S100 is omitted, and the standardized battery piece does not need to be cut to obtain at least two battery pieces. In this case, the battery cell may be a standard standardized battery cell directly purchased for outsourcing or a non-standardized battery cell after cutting purchased for outsourcing. And directly testing the electrical parameters of the battery pieces, selecting the battery pieces with the difference value between the rated electrical parameters and the testing electrical parameters not greater than the grading threshold value as first battery pieces, and selecting the battery pieces with the difference value between the testing electrical parameters and the testing electrical parameters of the first battery pieces not greater than the grading threshold value as second battery pieces.
According to the solar cell connecting method provided by the embodiment of the invention, the first cell with different rated electrical parameters and test electrical parameters and the second cell with the difference value between the test electrical parameters and the test electrical parameters of the first cell being not more than the grading threshold are electrically connected, so that the formed solar cell can improve the utilization rate of the cell and meet the requirement of diversity application, and the connecting method can reduce the production cost of the solar cell.
While the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the disclosure. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. A solar cell connecting method is characterized by comprising the following steps:
cutting the standardized battery pieces to obtain at least two battery pieces;
testing the electrical parameters of the at least two battery pieces to obtain a first battery piece and a second battery piece, wherein the rated electrical parameter of the first battery piece is different from the testing electrical parameter, the difference value between the testing electrical parameter of the second battery piece and the testing electrical parameter of the first battery piece is not greater than a grading threshold value, and the grading threshold value is 2% of the smaller value of the testing electrical parameter of the first battery piece and the testing electrical parameter of the second battery piece;
and electrically connecting the first battery piece with the second battery piece.
2. The solar cell connecting method according to claim 1, wherein the test electrical parameter is a no-load voltage and the electrical connection is parallel connection.
3. The solar cell connecting method according to claim 1, wherein the test electrical parameter is a short-circuit current, and the electrical connection is a series connection.
4. The solar cell connecting method according to claim 2, wherein the test electrical parameter is a no-load voltage, and the grading threshold is 2% of a smaller one of the test no-load voltage of the first cell and the test no-load voltage of the second cell.
5. The solar cell connecting method according to claim 3, wherein the test electrical parameter is a short-circuit current, and the classification threshold is 2% of a smaller value of the test short-circuit current of the first cell and the test short-circuit current of the second cell.
6. The method of claim 1, wherein the standardized cell is a glass-based CIGS cell, and the step of cutting the standardized cell to obtain at least two cells comprises:
removing the power generation layer of the standardized battery piece;
removing the molybdenum layer of the standardized battery piece;
and cutting the standardized battery piece.
7. The solar cell connecting method according to claim 6, wherein the width of the removed molybdenum layer is smaller than the width of the removed power generation layer.
8. The solar cell connecting method according to claim 6, wherein the width of the clean-up power generation layer is less than 22 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910300555.0A CN111883609A (en) | 2019-04-15 | 2019-04-15 | Solar cell connecting method |
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|---|---|---|---|
| CN201910300555.0A CN111883609A (en) | 2019-04-15 | 2019-04-15 | Solar cell connecting method |
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| CN111883609A true CN111883609A (en) | 2020-11-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793815A (en) * | 2021-09-26 | 2021-12-14 | 杭州广立微电子股份有限公司 | Wide-voltage-range high-speed multistage discharge circuit, test system and discharge method |
| CN113793815B (en) * | 2021-09-26 | 2024-04-26 | 杭州广立测试设备有限公司 | Wide-voltage-range high-speed multistage discharge circuit, test system and discharge method |
-
2019
- 2019-04-15 CN CN201910300555.0A patent/CN111883609A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793815A (en) * | 2021-09-26 | 2021-12-14 | 杭州广立微电子股份有限公司 | Wide-voltage-range high-speed multistage discharge circuit, test system and discharge method |
| CN113793815B (en) * | 2021-09-26 | 2024-04-26 | 杭州广立测试设备有限公司 | Wide-voltage-range high-speed multistage discharge circuit, test system and discharge method |
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Effective date of registration: 20210408 Address after: 518057 Room 201, building a, No.1 Qianwan 1st Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen City, Guangdong Province Applicant after: Shenzhen Zhengyue development and Construction Co.,Ltd. Address before: 101499 5 Fengxiang East Street, Yang Song Town, Huairou District, Beijing. Applicant before: BEIJING HANERGY OPTOVOLTAIC TECHNOLOGY Co.,Ltd. |
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Correction item: Applicant|Address Correct: Beijing Hanergy Photovoltaic Technology Co.,Ltd.|101499 No. 5, Fengxiang East Street, Yangsong Town, Huairou District, Beijing False: Shenzhen Zhengyue Development and Construction Co.,Ltd.|518057 Room 201, Building A, No. 1, Qianwan 1st Road, Qianhai Shenzhen-Hong Kong Cooperation Zone, Shenzhen, Guangdong Province (located in Shenzhen Qianhai Commercial Secretary Co.,Ltd.) Number: 17-01 Volume: 37 |
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