CN110971190A - Device and detection method for testing LETID (Linear induced degradation of temperature) of photovoltaic module - Google Patents
Device and detection method for testing LETID (Linear induced degradation of temperature) of photovoltaic module Download PDFInfo
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- CN110971190A CN110971190A CN201911218249.9A CN201911218249A CN110971190A CN 110971190 A CN110971190 A CN 110971190A CN 201911218249 A CN201911218249 A CN 201911218249A CN 110971190 A CN110971190 A CN 110971190A
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 230000015556 catabolic process Effects 0.000 title description 3
- 238000006731 degradation reaction Methods 0.000 title description 3
- 238000007789 sealing Methods 0.000 claims description 11
- 238000005485 electric heating Methods 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 description 4
- 235000012431 wafers Nutrition 0.000 description 3
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 2
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 2
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
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- 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
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Abstract
The invention discloses a device and a detection method for testing a photovoltaic module LETID, and relates to the field of photovoltaic module testers, the device comprises an environment box, a movable structure, a temperature adjusting structure and a movable contact testing structure, the movable structure is arranged on the side of the environment box, the temperature adjusting structure is arranged on one side of the outer wall of the environment box, the movable contact testing structure is arranged in the environment box, the movable structure can stably enter the environment box when a photovoltaic panel is placed in the environment box, the temperature adjusting structure can adjust the power of an electrothermal tube by changing the position of a sliding electrode on a resistance coil according to requirements, the adjustment of a testing environment is convenient, the movable contact testing structure is arranged, the sliding conductive plate can be placed on different fixed conductive plates, the continuity detection of current is carried out by a current detector, and (6) realizing the test.
Description
Technical Field
The invention relates to the field of photovoltaic module testers, in particular to a device and a detection method for testing a photovoltaic module LETID.
Background
Light and high temperature induced P-type crystal degradation (LETID) effects can cause field power loss on the PERC battery, and influence the technology of polycrystalline silicon and single crystal;
the standard high temperature "firing" of PERC technology solar cells can result in hydrogen diffusion into large wafers, combined with wafer defects/impurities, which can lead to LET D, which is difficult to remove without significant cost increase, and therefore it is necessary to design a device and detection method for testing the led id of a photovoltaic module that requires testing of the panel.
Disclosure of Invention
The invention aims to provide a device and a detection method for testing a photovoltaic module LETID, which can test a wafer with defects/impurities.
The purpose of the invention can be realized by the following technical scheme:
a device for testing a photovoltaic module LETID comprises an environment box, a movable structure, a temperature adjusting structure and a movable contact testing structure, wherein the movable structure is arranged on the side edge of the environment box, the temperature adjusting structure is arranged on one side of the outer wall of the environment box, and the movable contact testing structure is arranged inside the environment box;
the movable structure comprises a bearing plate, a sliding groove, a sealing box door, a pushing screw rod, a positioning plate, an asynchronous motor and a matching push rod, wherein the sliding groove is formed in the box wall at the bottom side of an inner cavity of the environment box;
the structure that adjusts the temperature includes electrothermal tube, accommodate motor, accommodate the lead screw, sliding electrode, sliding block, mount and resistance coil, the inner chamber top side tank wall at the environment case is established to the electrothermal tube support, the mount passes through welded fastening in outer wall one side of environment case, install resistance coil between the upper and lower both sides wall of mount, sliding electrode cup joints the outside at resistance coil, the sliding block rigid coupling is on the outside periphery of sliding electrode, the accommodate motor passes through the bolt cooperation and installs the top side at the mount, accommodate the lead screw's both ends are run through the setting respectively between the upper and lower two crossbeams of mount, accommodate the lead screw's top is installed at accommodate the motor's output tip, accommodate the lead screw runs through the inside of sliding block through the screw-thread fit, the inside of environment case is provided with the.
As a further scheme of the invention: the movable contact test structure comprises a conducting strip, an extrusion spring, a supporting plate, a fixed conducting plate, a sliding buckle, a current detector and a limiting groove plate, wherein the supporting plate transversely penetrates through the interior of the box wall of the environment box, the conducting strip is arranged at the bottom side of the supporting plate, the conducting strip is arranged between the top side of the conducting strip and the bottom side of the supporting plate, the limiting groove plate is fixedly connected to one end of the top side of the supporting plate, the fixed conducting plate is arranged in the limiting groove plate in parallel, the sliding buckle is matched with the groove plate which is arranged on one side of the limiting groove plate in a buckling mode, the sliding conducting plate is fixed to one side of the sliding buckle, and the current.
As a further scheme of the invention: the electric heating tube, the sliding electrode and the resistance coil form a series circuit with a power supply through conducting wires.
As a further scheme of the invention: and a plurality of groups of conducting strips are arranged at the bottom side of the supporting plate, and each conducting strip is correspondingly connected with each fixed conducting plate through a lead.
As a further scheme of the invention: the bottom side of the sliding conductive plate is tangent to the top side of the fixed conductive plate.
As a further scheme of the invention: and the top side of the inner wall of the limiting groove plate is provided with two sliding conductive plates, and the sliding conductive plates are connected with the current detector through wires.
A detection method for testing a photovoltaic module LETID comprises the following operation steps:
s1: initial curve measurements under STC conditions, according to international electrotechnical commission 60904-1;
s2: the testing module is arranged in an environment box, the adjusting screw rod is driven to rotate through the operation of an adjusting motor, the position of the sliding block is changed, the position of the sliding electrode on the resistance coil is changed, and the environment of the environment box is adjusted to 75 ℃;
s3: stabilizing the temperature of an environmental box at 75 ℃ for 1 hour;
s4: after the temperature is lower than 20%, each current line is connected to a load removed at different time intervals, and then the current is continuously detected by a current detector by changing the position of the slide fastener and placing the slide conductive plate on different fixed conductive plates to obtain a result;
s5: the adjusting screw rod is driven to rotate by the operation of the adjusting motor, the position of the sliding block is changed, the position of the sliding electrode on the resistance coil is changed, the temperature of the assembly is reduced to 25 ℃ at a speed of not more than 100 ℃/hour, the sliding conductive plate is placed on different fixed conductive plates by changing the position of the sliding buckle, and the current is continuously detected by the current detector, so that a result is obtained;
s6: and carrying out final IV test according to IEC60904-1, and obtaining a conclusion by integrating test results.
The invention has the beneficial effects that:
testing, through setting up the movable structure, can be when the photovoltaic board is putting into the environment incasement, the entering environment incasement that can be stable, through setting up the structure that adjusts the temperature, can be as required, through changing the position of sliding electrode on resistance coil, realize the power regulation to the electrothermal tube, the experimental environment's of being convenient for regulation, through setting up movable contact test structure, can be through placing the slip current conducting plate on different fixed current conducting plates, carry out continuity detection through the current detector to the electric current, realize the test.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a diagram of a movable contact test configuration of the present invention;
FIG. 3 is a schematic view of a temperature regulating structure of the present invention;
in the figure: 1. an environmental chamber; 2. a movable structure; 3. a temperature adjusting structure; 4. a movable contact test structure; 21. a bearing plate; 22. a slide plate; 23. a chute; 24. sealing the box door; 25. pushing the screw rod; 26. positioning a plate; 27. an asynchronous motor; 28. matching with a push rod; 31. an electric heating tube; 32. an adjustment motor; 33. adjusting the screw rod; 34. a sliding electrode; 35. a sliding block; 36. a fixed mount; 37. a resistance coil; 41. a conductive sheet; 42. a compression spring; 43. a support plate; 44. fixing the conductive plate; 45. a sliding conductive plate; 46. sliding and buckling; 47. a current detector; 48. and a limiting groove plate.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, the present invention provides a technical solution: a device and a detection method for testing a photovoltaic module LETID are disclosed:
the first embodiment is as follows:
a device for testing a photovoltaic module LETID comprises an environment box 1, a movable structure 2, a temperature adjusting structure 3 and a movable contact testing structure 4, wherein the movable structure 2 is arranged on the side edge of the environment box 1, the temperature adjusting structure 3 is arranged on one side of the outer wall of the environment box 1, and the movable contact testing structure 4 is arranged inside the environment box 1;
the movable structure 2 comprises a bearing plate 21, a sliding plate 22, a sliding groove 23, a sealing box door 24, a pushing screw rod 25, a positioning plate 26, an asynchronous motor 27 and a matching push rod 28, wherein the sliding groove 23 is formed in the box wall at the bottom side of the inner cavity of the environment box 1, the sliding plate 22 is arranged in the sliding groove 23, the bottom side of one end of the bearing plate 21 is connected with the top side of the sliding plate 22 in a welding mode, the sealing box door 24 is vertically welded and fixed on the end face of one end of the bearing plate 21, the matching push rod 28 is horizontally welded and fixed on the side face of the top of the sealing box door 24, the positioning plate 26 is fixed at one end of the top side face of the environment box 1, the asynchronous motor 27 is installed on one side of the positioning plate 26 in a matching mode through a bolt in a matching mode, the pushing;
the temperature adjusting structure 3 comprises an electric heating tube 31, an adjusting motor 32, an adjusting screw 33, a sliding electrode 34, a sliding block 35, a fixed frame 36 and a resistance coil 37, the electric heating tube 31 is erected on the wall of the top side of the inner cavity of the environment box 1, the fixed frame 36 is fixed on one side of the outer wall of the environment box 1 through welding, the resistance coil 37 is installed between the upper side wall and the lower side wall of the fixed frame 36, the sliding electrode 34 is sleeved on the outer side of the resistance coil 37, the sliding block 35 is fixedly connected on the outer circumferential surface of the sliding electrode 34, the adjusting motor 32 is installed on the top side of the fixed frame 36 through bolt matching, two ends of the adjusting screw 33 are respectively arranged between the upper cross beam and the lower cross beam of the fixed frame 36 in a penetrating manner, the top end of the adjusting screw 33 is installed on the output end part;
the movable contact test structure 4 comprises a conducting plate 41, an extrusion spring 42, a supporting plate 43, a fixed conducting plate 44, a sliding conducting plate 45, a sliding buckle 46, a current detector 47 and a limiting groove plate 48, wherein the supporting plate 43 transversely penetrates through the interior of the box wall of the environment box 1, the conducting plate 41 is arranged on the bottom side of the supporting plate 43, the conducting plate 41 is arranged between the top side of the conducting plate 41 and the bottom side of the supporting plate 43, the limiting groove plate 48 is fixedly connected to one end of the top side of the supporting plate 43, the fixed conducting plates 44 are arranged in the limiting groove plate 48 in parallel, the sliding buckle 46 is matched and buckled on the groove plate on one side of the limiting groove plate 48, the sliding conducting plate 45 is fixed on one side of the sliding buckle 46;
the electrothermal tube 31, the sliding electrode 34 and the resistance coil 37 form a series circuit with a power supply through conducting wires;
a plurality of sets of conducting strips 41 are arranged on the bottom side of the supporting plate 43, and each conducting strip 41 is connected with each fixed conducting plate 44 correspondingly through a conducting wire;
the bottom side of the sliding conductive plate 45 is tangent to the top side of the fixed conductive plate 44;
two sliding conductive plates 45 are arranged on the top side of the inner wall of the limiting groove plate 48, and the sliding conductive plates 45 are connected with a current detector 47 through conducting wires.
The working principle is as follows: during detection, a photovoltaic assembly is placed on the bearing plate 21, the asynchronous motor 27 operates to drive the pushing screw rod 25 to rotate, the sliding fit of the sliding plate 22 along the sliding groove 23 is realized under the matching of threads in the push rod 28, the sealing box door 24 is tightly attached to the environment box 1, the sealing of the environment box 1 is realized, after sealing, during temperature regulation setting, the regulating screw rod 33 is driven to rotate through the operation of the regulating motor 32, the position of the sliding block 35 is changed, the position of the sliding electrode 34 on the resistance coil 37 is changed, the size of the resistance is changed, the output power of the electric heating pipe 31 is regulated, the regulation of different temperatures is realized, meanwhile, stable cooling operation can be realized, during cooling, the connection test of the photovoltaic assembly can be realized through the matching of the extrusion spring 42 on the conducting plate 41, through the change of the position of the sliding buckle 46, through the arrangement of the sliding conducting plate 45 on different fixed conducting plates 44, the current is detected continuously by the current detector 47 to realize the test.
A detection method for testing a photovoltaic module LETID comprises the following operation steps:
s1: initial curve measurements under STC conditions, according to international electrotechnical commission 60904-1;
s2: the testing module is arranged in the environment box 1, the adjusting screw rod 33 is driven to rotate through the operation of the adjusting motor 32, the position of the sliding block 35 is changed, the position of the sliding electrode 34 on the resistance coil 37 is changed, and the environment of the environment box 1 is adjusted to 75 ℃;
s3: the temperature of the environmental box 1 is stabilized at 75 ℃, the time is 1 hour, and the temperature is less than 20%;
s4: after the temperature is lower than 20%, each current line is connected to a load removed at different time intervals, and then the current is continuously detected by the current detector 47 by changing the position of the slide fastener 46 and placing the slide conductive plate 45 on different fixed conductive plates 44 to obtain a result;
s5: the operation of the adjusting motor 32 drives the adjusting screw rod 33 to rotate, the position of the sliding block 35 is changed, the position of the sliding electrode 34 on the resistance coil 37 is changed, the temperature of the assembly is reduced to 25 ℃ at a speed of no more than 100 ℃/hour, the position of the sliding buckle 46 is changed, the sliding conductive plates 45 are placed on different fixed conductive plates 44, and the current is continuously detected by the current detector 47, so that a result is obtained;
s6: and carrying out final IV test according to IEC60904-1, and obtaining a conclusion by integrating test results.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The device for testing the LETID of the photovoltaic module is characterized by comprising an environment box (1), a movable structure (2), a temperature adjusting structure (3) and a movable contact testing structure (4), wherein the movable structure (2) is arranged on the side edge of the environment box (1), the temperature adjusting structure (3) is arranged on one side of the outer wall of the environment box (1), and the movable contact testing structure (4) is arranged inside the environment box (1);
the movable structure (2) comprises a bearing plate (21), a sliding plate (22), a sliding groove (23), a sealing box door (24), a pushing screw rod (25), a positioning plate (26), an asynchronous motor (27) and a matching push rod (28), wherein the sliding groove (23) is formed in the bottom side box wall of the inner cavity of the environment box (1), the sliding plate (22) is arranged in the sliding groove (23), the bottom side of one end of the bearing plate (21) is connected with the top side of the sliding plate (22) in a welding mode, the sealing box door (24) is vertically welded and fixed on the end face of one end of the bearing plate (21), the matching push rod (28) is horizontally welded and fixed on the side face of the top of the sealing box door (24), the positioning plate (26) is fixed at one end of the top side face of the environment box (1), the asynchronous motor (27) is installed on one side of the positioning plate (26) in a matching mode, the pushing screw rod (25) is installed at the output end part of the asynchronous motor (27), and the other end of the pushing screw rod (25) is installed inside the matching push rod (28) in a threaded matching mode;
the temperature adjusting structure (3) comprises an electric heating tube (31), an adjusting motor (32), an adjusting screw rod (33), a sliding electrode (34), a sliding block (35), a fixing frame (36) and a resistance coil (37), the electric heating tube (31) is erected on the inner cavity top side box wall of the environment box (1), the fixing frame (36) is fixed on one side of the outer wall of the environment box (1) through welding, the resistance coil (37) is installed between the upper side wall and the lower side wall of the fixing frame (36), the sliding electrode (34) is sleeved on the outer side of the resistance coil (37), the sliding block (35) is fixedly connected on the outer side circumferential surface of the sliding electrode (34), the adjusting motor (32) is installed on the top side of the fixing frame (36) through bolt matching, two ends of the adjusting screw rod (33) are respectively arranged between the upper cross beam and the lower cross beam of the fixing frame (36), the top end of the adjusting screw rod (33) is, adjusting screw (33) run through the inside of sliding block (35) through the screw-thread fit, the inside of environment case (1) is provided with the electronic thermometer.
2. The device for testing the LETID of the photovoltaic module according to claim 1, wherein the movable contact test structure (4) comprises a conductive sheet (41), an extrusion spring (42), a support plate (43), a fixed conductive plate (44), a sliding conductive plate (45), a slide fastener (46), a current detector (47) and a limit slot plate (48), the support plate (43) transversely penetrates through the inside of the wall of the environmental box (1), the conductive sheet (41) is arranged at the bottom side of the support plate (43), the conductive sheet (41) is arranged between the top side of the conductive sheet (41) and the bottom side of the support plate (43), the limit slot plate (48) is fixedly connected to one end of the top side of the support plate (43), the fixed conductive plates (44) are arranged in parallel inside the limit slot plate (48), and the slide fastener (46) is cooperatively fastened on the slot plate at one side of the limit slot plate (48), the sliding conductive plate (45) is fixed on one side of the sliding buckle (46), and the current detector (47) is vertically installed on the side top surface of the supporting plate (43).
3. Device for testing a photovoltaic module LETID according to claim 1, characterized in that said electrical heating tube (31), sliding electrode (34) and resistive coil (37) form a series circuit with the power supply by means of wires.
4. Device for testing photovoltaic modules LETID according to claim 2, characterized in that the bottom side of said support plate (43) is provided with a plurality of sets of conductive strips (41), each of said conductive strips (41) being connected by a wire in correspondence with each of said fixed conductive plates (44).
5. Device for testing photovoltaic modules LETID according to claim 2, characterized in that the bottom side of said sliding conductive plate (45) is tangent to the top side of the fixed conductive plate (44).
6. The device for testing the photovoltaic module LETID according to claim 2, characterized in that two sliding conductive plates (45) are arranged on the top side of the inner wall of the limiting groove plate (48), and the sliding conductive plates (45) are connected with a current detector (47) through wires.
7. A detection method for testing a photovoltaic module LETID comprises the following operation steps:
s1: initial curve measurements under STC conditions, according to international electrotechnical commission 60904-1;
s2: a test module is arranged in an environment box (1), an adjusting screw rod (33) is driven to rotate through operation of an adjusting motor (32), the position of a sliding block (35) is changed, the position of a sliding electrode (34) on a resistance coil (37) is changed, and the environment of the environment box (1) is adjusted to 75 ℃;
s3: the temperature of the environmental chamber (1) is stabilized at 75 ℃ for 1 hour;
s4: after the temperature is lower than 20%, each current line is connected to a load removed after different time intervals, and then the current is continuously detected by a current detector (47) by changing the position of a slide fastener (46), placing a slide conductive plate (45) on different fixed conductive plates (44) and obtaining a result;
s5: the adjusting screw rod (33) is driven to rotate through the operation of the adjusting motor (32), the position of the sliding block (35) is changed, the position of the sliding electrode (34) on the resistance coil (37) is changed, the temperature of the assembly is reduced to 25 ℃ at the speed of not more than 100 ℃/hour, the sliding button (46) is changed, the sliding conductive plate (45) is placed on different fixed conductive plates (44), and the current is continuously detected through the current detector (47), so that the result is obtained;
s6: and carrying out final IV test according to IEC60904-1, and obtaining a conclusion by integrating test results.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911218249.9A CN110971190A (en) | 2019-12-03 | 2019-12-03 | Device and detection method for testing LETID (Linear induced degradation of temperature) of photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911218249.9A CN110971190A (en) | 2019-12-03 | 2019-12-03 | Device and detection method for testing LETID (Linear induced degradation of temperature) of photovoltaic module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466768A (en) * | 2020-11-12 | 2021-03-09 | 东营大海科林光电有限公司 | Detection device and detection method for photovoltaic cell panel |
| CN112751532A (en) * | 2021-01-27 | 2021-05-04 | 莱茵技术（上海）有限公司 | Solar photovoltaic module's heat-resisting fire resistance test device |
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2019
- 2019-12-03 CN CN201911218249.9A patent/CN110971190A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466768A (en) * | 2020-11-12 | 2021-03-09 | 东营大海科林光电有限公司 | Detection device and detection method for photovoltaic cell panel |
| CN112751532A (en) * | 2021-01-27 | 2021-05-04 | 莱茵技术（上海）有限公司 | Solar photovoltaic module's heat-resisting fire resistance test device |
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