CN104227216A - On-line nondestructive testing method for resistance welding of solar cell - Google Patents
On-line nondestructive testing method for resistance welding of solar cell Download PDFInfo
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- CN104227216A CN104227216A CN201310236104.8A CN201310236104A CN104227216A CN 104227216 A CN104227216 A CN 104227216A CN 201310236104 A CN201310236104 A CN 201310236104A CN 104227216 A CN104227216 A CN 104227216A
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- Prior art keywords
- solar cell
- welding
- resistance welding
- temperature
- interconnect
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Mechanical Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to an on-line nondestructive testing method for resistance welding of a solar cell. The on-line nondestructive testing method comprises the steps of adjusting the current, the pressure and the time of a welder. The on-line nondestructive testing method for resistance welding of the solar cell is characterized by further comprising the steps that (1) welding spot areas are determined on a mutual connecting piece, electrodes on the welder are placed in the determined welding spot areas, and an infrared temperature measurement system aligns to the welding spot areas; (2) a resistance welder is started, the infrared temperature measurement system monitors the temperature curve of the welding spot areas in the resistance welding process until the welding process is completed; (3) the temperature curve is checked according to the qualified welding temperature range of the specifications of the tested solar cell to judge whether welding is qualified or not. According to the on-line nondestructive testing method for resistance welding of the solar cell, the welding spot areas are determined on the mutual connecting piece to be used as the monitoring area for resistance welding and infrared temperature measuring, the tested cell is not damaged, and all the welding spot areas are also detected. The purposes that in the solar cell welding process, the cell is not damaged, and whether welding of all lower electrodes of the solar cell and the mutual connecting piece is qualified or not can also be detected in real time are achieved, and the reliability of welding of the cell is guaranteed.
Description
Technical field
The invention belongs to solar cell electric resistance welding detection technique field, particularly relate to the online lossless detection method of a kind of solar cell electric resistance welding.
Background technology
Electric resistance welding is mainly used in sheet metal welding, its major advantage is that speed of welding is fast, firm welding is strong, and be applicable to automated production in enormous quantities, therefore solar cell bottom electrode and sheet of interconnect all adopt Resistance Welding connection technology, but, because electric resistance welding has the uncontrollable problem of weld point temperature, also be difficult to ensure to weld out qualified product under the prerequisite that other parameter is determined, therefore carrying out detection to the product after electric resistance welding is one of indispensable step.
At present, the method whether qualifiedly detecting solar cell electric resistance welding solder joint is after welding battery, according to the tensile strength index of battery solder joint, takes a sample test solar cell and carries out mechanical properties test, judge that whether solar cell electric resistance welding solder joint is qualified.The method is to high by the accuracy of judgement degree of battery quality of welding spot taken a sample test, but because tensile strength test is a kind of destructive detection method, can only indirectly judge that all the other do not survey a batch quality for solar cell electric resistance welding solder joint by the mode of testpieces or sampling Detection tensile strength, whole solar cell can not be made to obtain the direct-detection of welding quality, therefore the method is not only difficult to the reliability ensureing whole solar cell quality of welding spot, and causes the waste of product due to destructive testing.
Find that the patent No. is 201110033883.2 through retrieval, publication number is CN102183545A, patent name is: the patent of invention of the infrared measurement of temperature detection method of testing circuit plate welding spot reliability, disclose in its description and adopt infrared laser to send on the solder joint to be detected that a branch of infrared laser is focused on circuit board, thermal infrared imager is adopted to obtain the dynamic image of this solder joint to be detected and the dynamic image at this solder joint lead-in wire place to be detected, obtain the temperature distribution history at solder joint to be detected and this solder joint lead-in wire place to be detected, curve is superimposed on year-on-year basis, stack result is judged, when the distribution trend of two temperature distribution histories is identical, and maximum temperature point on two temperature distribution histories is synchronous, judge this solder joint to be detected whether as qualified solder joint, the technical problem solved is that circuit board soldering solder joint outward appearance is normal but whether solder joint has the problem that defect cannot carry out detecting.The method excites solder joint that its temperature is changed by infrared laser after welding, the change of weld point temperature not only has influence on the state of original solder joint, and solder joint cannot be made in welding process to obtain Real-Time Monitoring, be difficult to be applicable in automated production process in enormous quantities, detect that whether the welding of each product is qualified in real time, the reliability in wire bonding cannot be ensured.
Summary of the invention
The present invention provides in a kind of automated production process in enormous quantities for solving in known technology the technical problem that exists, neither damage tested battery, can detect again whether each solar cell bottom electrode is qualified with welding of sheet of interconnect in real time, guarantee the online lossless detection method of solar cell electric resistance welding of welding battery reliability.
The technical scheme that the present invention takes is:
The online lossless detection method of solar cell electric resistance welding, comprising: sheet of interconnect be placed on the bottom electrode face of solar cell, solar cell is placed on resistance welder; According to the model of solar cell, regulate the electric current of described welding machine, pressure and time, be characterized in: be further comprising the steps of:
(1) in sheet of interconnect, determine spot area, the electrode vertical on described welding machine is positioned at described region, and infrared temperature measurement system aims at spot area, performs sheet of interconnect and welds the preparation with Real-Time Monitoring weld point temperature with solar cell;
(2) starting resistance welding machine, the temperature curve of spot area when infrared temperature measurement system monitors electric resistance welding, until welding process terminates;
(3), according to the qualified welding temperature scope of tested solar cell model, by checking described temperature curve, namely judge that whether the solder joint of solar cell bottom electrode and sheet of interconnect is qualified.
The present invention can also adopt following technical scheme:
Described infrared temperature measurement system comprises the RAYMM2MHVF1L model high speed infrared temperature measurer being connected with computer; Described navigation system is the laser orientation system that described infrared radiation thermometer carries; The temperature curve of described solder joint is shown by the computer screen be connected on infrared radiation thermometer.
The model of described resistance welder is HF-25 type.
The advantage that the present invention has and good effect are:
1, the present invention determines by navigation system the region that spot area is monitored as electric resistance welding and infrared measurement of temperature in sheet of interconnect, solder joint and monitoring location accurate, the change curve of spot area temperature is monitored by computer screen display infrared radiation thermometer, the overall process of display welding temperature, neither damage tested battery, each spot area is made again to be detected, achieve in solar cell welding process and neither damage tested battery, can detect again whether each solar cell bottom electrode is qualified with welding of sheet of interconnect, ensure that the reliability of welding battery in real time;
2, the present invention adopts the HF-25 type resistance welder that welding process is 50ms, welding region is less than diameter 2mm, can be diameter 2mm, carry the RAYMM2MHVF1L high speed infrared temperature measurer of laser orientation system up to 6 μ s, test area by test response frequency, test period is short, response frequency is fast, test data is accurate, achieve accurate real-time online and judge that whether the solder joint of solar cell and sheet of interconnect is qualified, further ensure the reliability of welding battery.
Accompanying drawing explanation
Fig. 1 is solar cell electric resistance welding of the present invention online lossless detection method device schematic diagram;
Fig. 2 adopts the present invention to monitor 1
#1 of battery pinpoint welding procedure
#temperature profile;
Fig. 3 adopts the present invention to monitor 2
#2 of battery pinpoint welding procedure
#temperature profile;
Fig. 4 adopts the present invention to monitor 3
#3 of battery pinpoint welding procedure
#temperature profile;
Fig. 5 adopts the present invention to monitor 4
#4 of battery pinpoint welding procedure
#temperature profile;
Fig. 6 adopts the present invention to monitor 5
#5 of battery pinpoint welding procedure
#temperature profile;
Fig. 7 adopts the present invention to monitor 6
#6 of battery pinpoint welding procedure
#temperature profile.
In figure, 1-computer, 2-infrared radiation thermometer, 3-solar cell, 4-sheet of interconnect, 5-solder joint, 6-electrode.
Detailed description of the invention
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
With reference to Fig. 1:
The online lossless detection method of solar cell electric resistance welding, comprising: sheet of interconnect 4 be placed on the bottom electrode face of solar cell 3, solar cell is placed on resistance welder; According to the model of solar cell, regulate the electric current of described welding machine, pressure and time.
Innovative point of the present invention is, further comprising the steps of:
(1) in sheet of interconnect, determine solder joint 5 region, the electrode 6 on described welding machine is vertically positioned at described region, and infrared temperature measurement system aims at spot area, performs sheet of interconnect and welds the preparation with Real-Time Monitoring weld point temperature with solar cell;
(2) starting resistance welding machine, the temperature curve of spot area when infrared temperature measurement system monitors electric resistance welding, until welding process terminates;
(3), according to the qualified welding temperature scope of tested solar cell model, by checking described temperature curve, namely judge that whether the solder joint of solar cell bottom electrode and sheet of interconnect is qualified.
Innovative point of the present invention also comprises:
Described infrared temperature measurement system comprises the RAYMM2MHVF1L model high speed infrared temperature measurer 2 being connected with computer 1, and calculator memory contains working procedure; Described navigation system is the laser orientation system that described infrared radiation thermometer carries; The temperature curve of described solder joint is shown by the computer screen be connected on infrared radiation thermometer.
The model of described resistance welder is HF-25 type.
Experiment work process of the present invention:
(1) choose six gallium arsenide solar cells, be labeled as respectively: 1
#battery, 2
#battery, 3
#battery, 4
#battery, 5
#battery, 6
#battery; Silver interconnect is placed on respectively the bottom electrode place to be welded of every sheet solar cell, the electric current of HF-25 type resistance welder, pressure and time parameter are adjusted to 140A, 7N and 50ms respectively, the qualified weld point temperature under this condition is 340 ± 10 DEG C;
(2) calculator memory storage working procedure, RAYMM2MHVF1L high speed infrared temperature measurer connects on computers, in sheet of interconnect, determine that diameter is 2mm spot area by the laser orientation system that described infrared radiation thermometer carries, the spot area determined aimed at by infrared radiation thermometer; Two electrodes on resistance welder are all vertically positioned at the spot area determined;
(3) starting resistance welding machine, carries out a spot welding to six solar cells chosen respectively, the test response frequency of infrared radiation thermometer is 2ms, test area is diameter 2mm; Pinpoint welding procedure each time, computer screen all shows the temperature curve that an infrared radiation thermometer monitors, as shown in Fig. 2-Fig. 7, contrast 1
#battery, 2
#battery, 3
#battery, 4
#battery, 5
#battery, 6
#battery sequential, is respectively 1
#temperature curve, 2
#temperature curve, 3
#temperature curve, 4
#temperature curve, 5
#temperature curve, 6
#temperature curve;
(4), according to qualified temperature range value 340 ± 10 DEG C of standards, by checking six temperature curves, judge 1 after welding
#battery, 2
#battery, 3
#battery, 4
#battery, 6
#welding battery is qualified, 5
#welding battery is defective.
Verify result of the test of the present invention:
Adopt the most original, mechanical properties test method the most accurately, the verification experimental verification of identical pulling force is carried out, 1 to batteries after six welding
#battery, 2
#battery, 3
#battery, 4
#battery, 6
#battery maintains the original state, and 5
#the sheet of interconnect of battery comes off.The result shows, the online lossless detection method of solar cell electric resistance welding of the present invention accurately, reliably.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.
Claims (3)
1. the online lossless detection method of solar cell electric resistance welding, comprising: sheet of interconnect be placed on the bottom electrode face of solar cell, solar cell is placed on resistance welder; According to the model of solar cell, regulate the electric current of resistance welder, pressure and time, it is characterized in that: be further comprising the steps of:
(1) in sheet of interconnect, determine spot area by navigation system, the electrode vertical on described resistance welder is positioned at described region, and infrared temperature measurement system aims at spot area, performs sheet of interconnect and welds the preparation with Real-Time Monitoring weld point temperature with solar cell;
(2) starting resistance welding machine, the temperature curve of spot area when infrared temperature measurement system monitors electric resistance welding, until welding process terminates;
(3), according to the qualified welding temperature scope of tested solar cell model, by checking described temperature curve, namely judge that whether the solder joint of solar cell bottom electrode and sheet of interconnect is qualified.
2. the online lossless detection method of solar cell electric resistance welding according to claim 1, is characterized in that: described infrared temperature measurement system comprises the RAYMM2MHVF1L model high speed infrared temperature measurer being connected with computer; Described navigation system is the laser orientation system that described infrared radiation thermometer carries; The temperature curve of described solder joint is shown by the computer screen be connected on infrared radiation thermometer.
3. the online lossless detection method of solar cell electric resistance welding according to claim 1, is characterized in that: the model of described resistance welder is HF-25 type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310236104.8A CN104227216A (en) | 2013-06-14 | 2013-06-14 | On-line nondestructive testing method for resistance welding of solar cell |
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| CN201310236104.8A CN104227216A (en) | 2013-06-14 | 2013-06-14 | On-line nondestructive testing method for resistance welding of solar cell |
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| CN201310236104.8A Pending CN104227216A (en) | 2013-06-14 | 2013-06-14 | On-line nondestructive testing method for resistance welding of solar cell |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598598A (en) * | 2015-11-11 | 2016-05-25 | 天津市鑫鼎源科技发展有限公司 | Solar cell panel electrode welding temperature measuring and positioning device and use method |
| CN107271486A (en) * | 2017-07-25 | 2017-10-20 | 北京华特时代电动汽车技术有限公司 | The quality determining method and system of welding battery |
| CN108918640A (en) * | 2018-07-10 | 2018-11-30 | 海建平 | A method of for Wing members crack monitoring, repairing device and for Wing members crack monitoring, reparation |
| CN110715600A (en) * | 2019-10-18 | 2020-01-21 | 济南蓝动激光技术有限公司 | Steel rail welding seam misalignment online detection system |
| CN113245741A (en) * | 2021-04-30 | 2021-08-13 | 佛山市天劲新能源科技有限公司 | Welding detection system |
| CN114682966A (en) * | 2020-12-25 | 2022-07-01 | 中国电子科技集团公司第十八研究所 | Automatic welding method for integrating upper electrode of space solar cell |
| CN117517998A (en) * | 2024-01-04 | 2024-02-06 | 深圳达温技术服务有限公司 | Method for quickly and automatically screening bad welding of battery |
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| CN201906921U (en) * | 2010-12-02 | 2011-07-27 | 长沙华锐机电实业有限公司 | Point welding machine combining infrared temperature control with constant-current control |
| CN102183545A (en) * | 2011-01-31 | 2011-09-14 | 哈尔滨工业大学 | Infrared temperature measurement detection method for detecting solder joint reliability of circuit board |
| CN103018277A (en) * | 2011-09-22 | 2013-04-03 | 通用汽车环球科技运作有限责任公司 | Non-destructive evaluation of welded joints of bar wound stator utilizing infrared and thermal methods |
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| JPS5699082A (en) * | 1980-01-14 | 1981-08-10 | Hitachi Ltd | Resistance welding infrared-ray temperature monitor |
| JPH10113776A (en) * | 1996-10-08 | 1998-05-06 | Toyota Motor Corp | Recognizing method of dust generating state |
| JP2001191186A (en) * | 2000-01-07 | 2001-07-17 | Auto Network Gijutsu Kenkyusho:Kk | Quality evaluation system for weld zone |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598598A (en) * | 2015-11-11 | 2016-05-25 | 天津市鑫鼎源科技发展有限公司 | Solar cell panel electrode welding temperature measuring and positioning device and use method |
| CN105598598B (en) * | 2015-11-11 | 2017-10-03 | 天津市鑫鼎源科技发展有限公司 | A kind of solar panel electrode welding thermometric positioner and application method |
| CN107271486A (en) * | 2017-07-25 | 2017-10-20 | 北京华特时代电动汽车技术有限公司 | The quality determining method and system of welding battery |
| CN107271486B (en) * | 2017-07-25 | 2019-11-08 | 北京华特时代电动汽车技术有限公司 | The quality determining method and system of welding battery |
| CN108918640A (en) * | 2018-07-10 | 2018-11-30 | 海建平 | A method of for Wing members crack monitoring, repairing device and for Wing members crack monitoring, reparation |
| CN110715600A (en) * | 2019-10-18 | 2020-01-21 | 济南蓝动激光技术有限公司 | Steel rail welding seam misalignment online detection system |
| CN110715600B (en) * | 2019-10-18 | 2021-07-30 | 济南蓝动激光技术有限公司 | Steel rail welding seam misalignment online detection system |
| CN114682966A (en) * | 2020-12-25 | 2022-07-01 | 中国电子科技集团公司第十八研究所 | Automatic welding method for integrating upper electrode of space solar cell |
| CN114682966B (en) * | 2020-12-25 | 2023-06-23 | 中电科蓝天科技股份有限公司 | Automatic welding method for upper electrode integration of space solar cell |
| CN113245741A (en) * | 2021-04-30 | 2021-08-13 | 佛山市天劲新能源科技有限公司 | Welding detection system |
| CN117517998A (en) * | 2024-01-04 | 2024-02-06 | 深圳达温技术服务有限公司 | Method for quickly and automatically screening bad welding of battery |
| CN117517998B (en) * | 2024-01-04 | 2024-04-02 | 深圳达温技术服务有限公司 | Method for quickly and automatically screening bad welding of battery |
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Application publication date: 20141224 |