CN221079938U - A photovoltaic module and EL tester for EL test - Google Patents
A photovoltaic module and EL tester for EL test Download PDFInfo
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- CN221079938U CN221079938U CN202322932374.4U CN202322932374U CN221079938U CN 221079938 U CN221079938 U CN 221079938U CN 202322932374 U CN202322932374 U CN 202322932374U CN 221079938 U CN221079938 U CN 221079938U
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- 238000012360 testing method Methods 0.000 title claims abstract description 62
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims description 49
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical group [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000000881 depressing effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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 utility model relates to the field of photovoltaic production, in particular to a photovoltaic module for EL test and an EL tester, comprising a battery string, a cover plate and bus bars, wherein a plurality of battery strings are connected in series or in parallel to form the photovoltaic module; the bus bars are respectively and correspondingly connected with the positive end and the negative end of the battery string, and the two surfaces of the bus bars are respectively a conductive surface and an insulating surface; the cover plate is provided with a plurality of holes; bus bars respectively and correspondingly connected with the positive end and the negative end of the battery string extend out of the surface of the photovoltaic module from the same hole of the protective cover plate; the bus bars extending from the same hole are bent in the same direction, and the insulating surfaces of the bus bars extending from the same hole are opposite; the bus bars corresponding to the edge battery strings of the photovoltaic module are bent and then the conductive surfaces face upwards; the edge battery strings are respectively positioned at the positive and negative ends of the plurality of battery strings which are connected in series or in parallel. The utility model improves the testing efficiency and the production efficiency and reduces the cost.
Description
Technical Field
The utility model relates to the field of photovoltaic production, in particular to a photovoltaic module for EL test and an EL tester.
Background
With the progress of technology and the worry about the exhaustion of traditional energy sources, the photovoltaic industry is receiving more and more attention, and currently, most photovoltaic modules are battery strings formed by connecting a plurality of battery pieces in series so as to provide higher output power.
In the process of continuous development, more new materials are introduced into the photovoltaic module in terms of cost reduction and efficiency enhancement, wherein the bus bar plays an important role on the photovoltaic module, one side of the bus bar is of a non-conductive structure, but in order to ensure the yield of the module in the production process, EL (electroluminescence) tests are required to be carried out on the front section and the rear section of the module, the special connecting device is required to be electrically connected with the bus bar in the module so as to finish EL tests, the bus bar extending out of the same hole is oppositely bent in an insulating way, two conductive surfaces are inclined downwards to form an inverted eight shape, the corresponding test fixture is a clamping fixture, and the clamping fixture is divided into a clamping conductive mechanism and a pressing block.
Therefore, how to improve the EL test efficiency in the packaging process of the photovoltaic module, thereby improving the production efficiency of the module and reducing the labor cost is a problem to be solved by those skilled in the art.
Disclosure of utility model
The utility model aims to provide a photovoltaic module and an EL tester for EL test, which are used for solving the problems of difficult EL test, increased labor cost and reduced production efficiency of the module caused by the packaging process of the photovoltaic module in the prior art.
In order to solve the technical problems, the utility model provides a photovoltaic module for EL test, which comprises a battery string formed by connecting a plurality of photovoltaic cells in series, a cover plate for protecting the battery string, and bus bars respectively electrically connected with the battery string, wherein the plurality of battery strings are connected in series or in parallel to form the photovoltaic module;
The bus bars are respectively and correspondingly connected with the positive end and the negative end of the battery string, and the two surfaces of the bus bars are respectively a conductive surface and an insulating surface;
The cover plate is provided with a plurality of holes; bus bars respectively and correspondingly connected with the positive end and the negative end of the battery string extend out of the surface of the photovoltaic module from the same hole of the protective cover plate;
The bus bars extending from the same hole are bent in the same direction, and the insulating surfaces of the bus bars extending from the same hole are opposite; the bus bars corresponding to the edge battery strings of the photovoltaic module are bent and then the conductive surfaces face upwards;
The edge battery strings are respectively positioned at the positive and negative ends of the plurality of battery strings which are connected in series or in parallel.
Optionally, in the photovoltaic module for EL test, an included angle between the bent bus bar and the surface of the photovoltaic module is smaller than 45 degrees.
Optionally, in the photovoltaic module for EL test, the bus bar is a tin bar;
The insulating face of the bus bar includes an insulating coating.
Optionally, in the photovoltaic module for EL test, the bus bar is a black bus bar.
Optionally, in the photovoltaic module for EL testing, the plurality of holes are located at a center line position of a back protection cover plate of the photovoltaic module.
An EL tester comprises a transmission assembly, a camera and a pressing conductive head;
the conveyor belt is used for conveying the photovoltaic module to be tested;
The camera is used for photographing the photovoltaic module to be tested in the view finding area;
The pressing conductive head can move up and down in the direction perpendicular to the conveying surface of the conveying component and is used for being lowered to a preset height to be in contact with the conductive surface of the bus bar of the edge battery string on the photovoltaic component to be tested, so that the EL tester and the photovoltaic component to be tested form an EL test loop;
The edge battery strings are battery strings positioned at the positive and negative ends of a plurality of battery strings connected in series or in parallel.
Optionally, in the EL tester, the front end of the pressing conductive head includes a contact plate, and an extending direction of the contact plate is perpendicular to a moving direction of the pressing conductive head.
Optionally, in the EL tester, the camera view-finding area covers only a single cell string area of the photovoltaic module to be tested.
Optionally, the EL tester includes a plurality of groups of the pressing conductive heads;
The number of the groups of the pressing conductive heads is one half or equal to the number of the battery strings.
Optionally, in the EL tester, the contact plate is a rectangular contact plate.
The photovoltaic module for EL test comprises a plurality of battery strings connected in series and bus bars corresponding to the battery strings; the two surfaces of the bus bar are respectively a conductive surface and an insulating surface; the adjacent battery strings are in a group, and bus bars corresponding to the battery strings in the same group extend out of the surface of the photovoltaic module from the same hole; the bus bars extending from the same hole are bent in the same direction, and the insulating surfaces of the bus bars extending from the same hole are opposite; the bus bars corresponding to the edge battery strings of the photovoltaic module are bent and then the conductive surfaces face upwards; the edge battery strings are battery strings positioned at two ends of the plurality of battery strings connected in series. According to the utility model, after the bus bars extend out of the surface of the photovoltaic module, the insulating surfaces of the two bus bars are opposite and bent towards the same side, so that the conductive surface of one bus bar is necessarily oriented upwards or obliquely upwards, the downward-pressing type conductive head can be conveniently and electrically connected with the bus bars, even after a subsequent lamination process, the downward-pressing type conductive head is not influenced, namely, the two bus bars extending out of the same hole are still electrically connected through the downward-pressing type conductive head, the EL test in the whole assembly process is free from manual intervention, the test efficiency and the production efficiency are greatly improved, the labor cost in production is reduced, and the battery strings corresponding to the bus bars with the upward-pressing type conductive surface are battery strings positioned at the two ends of the photovoltaic module, so that all the battery strings in the photovoltaic module can be incorporated into a conductive loop in each EL test, the degree of freedom of the EL test is greatly increased, and the operation steps of the EL test are simplified. The utility model also provides an EL tester with the beneficial effects.
Drawings
For a clearer description of embodiments of the utility model or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of a photovoltaic module according to an embodiment of the prior art;
FIG. 2 is a schematic diagram showing the connection between the EL test and the bus bar in the prior art;
FIG. 3 is a schematic structural diagram of a photovoltaic module for EL testing according to an embodiment of the present utility model;
FIG. 4 is a schematic structural diagram of a photovoltaic module for EL testing according to an embodiment of the present utility model;
Fig. 5 is a schematic structural diagram of an embodiment of the EL tester provided by the present utility model.
The figure includes 10-bus bars, 11-insulating faces, 12-conductive faces, 20-cell strings, 21-edge cell strings, A, B, C, A ', B ', C ' -press-down conductive heads, 110-contact plates, 200-cameras, 300-transfer assemblies.
Detailed Description
In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides a photovoltaic module for EL test, wherein a structural schematic diagram of one specific embodiment is shown in FIG. 3, and the photovoltaic module is called as a specific embodiment I, and comprises a battery string formed by connecting a plurality of photovoltaic cells in series with each other, a cover plate for protecting the battery string, and bus bars respectively electrically connected with the battery string, wherein a plurality of battery strings are connected in series or in parallel to form the photovoltaic module;
The bus bars are respectively and correspondingly connected with the positive end and the negative end of the battery string, and the two surfaces of the bus bars are respectively a conductive surface and an insulating surface;
The cover plate is provided with a plurality of holes; bus bars respectively and correspondingly connected with the positive end and the negative end of the battery string extend out of the surface of the photovoltaic module from the same hole of the protective cover plate;
The bus bars extending from the same hole are bent in the same direction, and the insulating surfaces of the bus bars extending from the same hole are opposite; the bus bars corresponding to the edge battery strings of the photovoltaic module are bent and then the conductive surfaces face upwards;
The edge battery strings are respectively positioned at the positive and negative ends of the plurality of battery strings which are connected in series or in parallel.
In the utility model, the conductive surface of the bus bar corresponding to the edge battery string is limited to be upward, the corresponding EL tester only needs to be connected with the bus bar corresponding to the edge battery string, so that all battery strings in the whole photovoltaic module can be electrified, then, the whole photovoltaic module or a target area is only required to be shot, an EL test result can be obtained, the point of electrified connection (namely the bus bar) is not required to be frequently switched, the bus bars corresponding to the battery strings at other positions are not required to be processed, the EL test flow is greatly simplified, and the test efficiency is improved.
It should be noted that, in the present utility model, the "bus bar corresponding to the battery string" refers to a bus bar connected to the battery string, and it is known in the related art that, in general, each battery string in a photovoltaic module has a bus bar connected thereto for electrically connecting to an external circuit, and a common lead-out position of the bus bar is shown in fig. 1 and marked with a "bus bar" and is circled by a dotted line.
Further, the bus bars are black bus bars, and only the bus bars corresponding to the edge battery strings are bent to face upwards in a conductive mode, and the bus bars corresponding to the other battery strings are bent to face upwards in an insulating mode.
Because the insulating surface of the black bus bar is black, the whole assembly is out of the area of the bus bar corresponding to the edge battery string, and the rest positions are all black, so that the manufacturing of the full-black assembly is facilitated, and the photoelectric conversion efficiency of the assembly is further improved. A schematic view of the bending direction of the bus bar on the surface of the photovoltaic module in this case can be referred to fig. 4. Further, the included angle between the bent bus bar and the surface of the photovoltaic module is smaller than 45 degrees. The bus bar after bending is firstly subjected to the front section EL test, and the photovoltaic module at the moment is not subjected to lamination process, so that in order to ensure that the front section EL test is performed, the pressed conductive head can press the bus bar after bending on the surface of the module, and the smaller and better the included angle between the bus bar and the surface of the module is, in the preferred embodiment, the included angle between the bus bar after bending and the surface of the photovoltaic module is selected to be smaller than 45 degrees, the front section EL test is ensured, and the bus bar can keep the conductive surface to be in close contact with the conductive head upwards in the pressing process.
As a preferred embodiment, the plurality of holes are located at a center line position of the back protection cover plate of the photovoltaic module.
The center line position refers to a center line along the arrangement direction of the battery strings in the photovoltaic module, and referring to fig. 1, the extending direction of the battery strings of the photovoltaic module is perpendicular to the arrangement direction of the battery strings, so that the holes are arranged along the center line position, which means that the bus bars are led out from the middle positions of the corresponding battery strings, thereby facilitating wiring, and certainly, the bus bars can be led out from other positions according to actual needs.
In addition, the bus bar is a tin bar, the cost of the tin bar is low, the conductivity is good, the bus bar can be obtained after the insulating layer is arranged on one side, of course, other materials can be adopted to manufacture the bus bar, for example, the conducting layer, the insulating layer and the like are arranged on two sides of the base material in a distinguishing way, and the utility model is not repeated here.
Also, the insulating face of the bus bar includes an insulating coating. That is, the single-sided insulation of the bus bar is realized by arranging the single-sided insulation layer, the method can be suitable for realizing single-sided insulation of a large number of base materials, and has larger universality, and of course, the bus bar base material is also possible to be an insulation material, and the insulation coating is not needed any more, and only a conductive layer is needed to be arranged on one side.
Still further, the bus bar is a black bus bar. The black bus bar is used for indicating that the insulating surface is black, the black bus bar is helpful for increasing the light absorption area of the photovoltaic module, the unnecessary light is prevented from being lost by reflection, and the photoelectric conversion efficiency of the module is improved.
The photovoltaic module for EL test comprises a battery string formed by connecting a plurality of positive electrodes and negative electrodes of photovoltaic cells in series, a cover plate for protecting the battery string, and bus bars respectively electrically connected with the battery string, wherein the plurality of battery strings are connected in series or in parallel to form the photovoltaic module; the bus bars are respectively and correspondingly connected with the positive end and the negative end of the battery string, and the two surfaces of the bus bars are respectively a conductive surface and an insulating surface; the cover plate is provided with a plurality of holes; bus bars respectively and correspondingly connected with the positive end and the negative end of the battery string extend out of the surface of the photovoltaic module from the same hole of the protective cover plate; the bus bars extending from the same hole are bent in the same direction, and the insulating surfaces of the bus bars extending from the same hole are opposite; the bus bars corresponding to the edge battery strings of the photovoltaic module are bent and then the conductive surfaces face upwards; the edge battery strings are respectively positioned at the positive and negative ends of the plurality of battery strings which are connected in series or in parallel. According to the utility model, after the bus bars extend out of the surface of the photovoltaic module, the insulating surfaces of the two bus bars are opposite and bent towards the same side, so that the conductive surface of one bus bar is necessarily oriented upwards or obliquely upwards, the downward-pressing type conductive head can be conveniently and electrically connected with the bus bars, even after a subsequent lamination process, the downward-pressing type conductive head is not influenced, namely, the two bus bars extending out of the same hole are still electrically connected through the downward-pressing type conductive head, the EL test in the whole assembly process is free from manual intervention, the test efficiency and the production efficiency are greatly improved, the labor cost in production is reduced, and the battery strings corresponding to the bus bars with the upward-pressing type conductive surface are battery strings positioned at the two ends of the photovoltaic module, so that all the battery strings in the photovoltaic module can be incorporated into a conductive loop in each EL test, the degree of freedom of the EL test is greatly increased, and the operation steps of the EL test are simplified.
The utility model also provides an EL tester, a structural schematic diagram of one specific embodiment of which is shown in FIG. 5, which is called as a second specific embodiment, and comprises a transmission assembly 300, a camera and a pressing conductive head;
the conveyor belt is used for conveying the photovoltaic module to be tested;
The camera is used for photographing the photovoltaic module to be tested in the view finding area;
The pressing conductive head can move up and down in a direction perpendicular to the conveying surface of the conveying component 300 and is used for being lowered to a preset height to be in contact with the conductive surface of the bus bar of the edge battery string on the photovoltaic component to be tested, so that the EL tester and the photovoltaic component to be tested form an EL test loop;
The edge battery strings are battery strings positioned at the positive and negative ends of a plurality of battery strings connected in series or in parallel.
Specifically, the front end of the pressing conductive head comprises a contact plate, and the extending direction of the contact plate is perpendicular to the moving direction of the pressing conductive head. The contact plate greatly increases the contact area of the pressing conductive head and the bus bar of the photovoltaic module to be tested, increases the alignment tolerance of the photovoltaic module to be tested and the pressing conductive head, and improves the working stability in the test process.
Still further, the contact plate is a rectangular contact plate. The rectangular contact plate is convenient to manufacture and low in cost, and of course, other contact plates can be selected according to practical situations, and the utility model is not limited in this regard.
As a preferred embodiment, the camera view area covers only a single cell string area of the photovoltaic module under test. The view finding area of the camera is limited to be a single battery string, so that the resolution of an acquired image can be greatly improved, the judging accuracy of a test result is improved, and the view finding area of the camera is limited to be a single battery string by integrating view finding range consideration of most cameras on the market at present, so that the selection range of the types of the camera can be greatly increased, and the universality is improved.
Further, the device comprises a plurality of groups of the pressing conductive heads;
The number of the groups of the pressing conductive heads is one half or equal to the number of the battery strings.
The group of the pressing conductive heads in the preferred embodiment at least comprises one pressing conductive head connected with the positive electrode and one pressing conductive head connected with the negative electrode, and can complete the combination of closed loops of the circuit.
Referring to fig. 5, the number of the groups of the pressing conductive heads is half of the number of the battery strings, and the same group includes one pressing conductive head connected with the positive electrode and one pressing conductive head connected with the negative electrode, and each conductive head is connected with only one battery string; the condition that the number of the groups of the pressing conductive heads is equal to that of the battery strings means that the same group comprises a pressing conductive head connected with an anode and a pressing conductive head connected with a cathode, each battery string is divided into an upper part and a lower part, the upper part and the lower part are respectively provided with a corresponding pressing conductive head, each battery string corresponds to two pressing conductive heads, and each conductive head is provided with another pressing conductive head arranged in another battery string and forms a group with the other battery string, so that the number of the groups of the pressing conductive heads is equal to that of the battery strings finally. The advantage of this split up and down is that due to the parallel structure of part of the battery string, even if the upper half or the lower half of the battery string fails, the other half can be detected.
The EL tester of the present utility model is used in conjunction with the photovoltaic module described above, and the related technical details can be referred to above, which will not be described herein.
The following provides a procedure of EL test of the to-be-tested photovoltaic module by using an EL tester (assuming that the to-be-tested photovoltaic module includes a first battery string, a second battery string … and a sixth battery string together), please refer to fig. 5, in which A, B, C, A ', B ', and C ' represent different six pressing conductive heads, including:
A. After the assembly enters the EL machine, according to equipment program setting, the first battery string and the second battery string of the assembly can advance to the upper part of the photographing camera, at the moment, the 2 probes A, A' are pressed down to just touch bus bars corresponding to the two edge battery strings, a loop is formed through conduction, testing of the first battery string and the second battery string is completed, and the pressing conductive head is lifted.
B. the assembly continues to step, the third battery string and the fourth battery string just advance to the position above the photographing camera, the 2 probes B, B' are pressed down, bus bars corresponding to the two edge battery strings are touched, a loop is formed through conduction, testing of the third battery string and the fourth battery string is completed, and the pressing conductive head is lifted.
C. The assembly continues to travel according to the program, the fifth battery string and the sixth battery string travel to the position above the photographing camera, finally the 2 probes C, C' are pressed down to touch the bus bars corresponding to the two edge battery strings, and the circuit is formed through conduction, so that the testing of the fifth battery string and the sixth battery string is completed, and at the moment, the assembly completes all the testing.
The EL tester provided by the utility model comprises a transmission assembly 300, a camera and a pressing conductive head; the conveyor belt is used for conveying the photovoltaic module to be tested; the camera is used for photographing the photovoltaic module to be tested in the view finding area; the pressing conductive head can move up and down in a direction perpendicular to the conveying surface of the conveying component 300 and is used for being lowered to a preset height to be in contact with the conductive surface of the bus bar of the edge battery string on the photovoltaic component to be tested, so that the EL tester and the photovoltaic component to be tested form an EL test loop; the edge battery strings are battery strings positioned at the positive and negative ends of a plurality of battery strings connected in series or in parallel. According to the utility model, after the bus bars extend out of the surface of the photovoltaic module, the insulating surfaces of the two bus bars are opposite and bent towards the same side, so that the conductive surface of one bus bar is necessarily oriented upwards or obliquely upwards, the downward-pressing type conductive head can be conveniently and electrically connected with the bus bars, even after a subsequent lamination process, the downward-pressing type conductive head is not influenced, namely, the two bus bars extending out of the same hole are still electrically connected through the downward-pressing type conductive head, the EL test in the whole assembly process is free from manual intervention, the test efficiency and the production efficiency are greatly improved, the labor cost in production is reduced, and the battery strings corresponding to the bus bars with the upward-pressing type conductive surface are battery strings positioned at the two ends of the photovoltaic module, so that all the battery strings in the photovoltaic module can be incorporated into a conductive loop in each EL test, the degree of freedom of the EL test is greatly increased, and the operation steps of the EL test are simplified.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The photovoltaic module for EL test and the EL tester provided by the utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (10)
1. The photovoltaic module for EL test comprises a battery string formed by serially connecting a plurality of photovoltaic cells with each other, a cover plate for protecting the battery string, and bus bars electrically connected with the battery strings respectively, and is characterized in that the plurality of battery strings are serially connected or parallelly connected to form the photovoltaic module;
The bus bars are respectively and correspondingly connected with the positive end and the negative end of the battery string, and the two surfaces of the bus bars are respectively a conductive surface and an insulating surface;
The cover plate is provided with a plurality of holes; bus bars respectively and correspondingly connected with the positive end and the negative end of the battery string extend out of the surface of the photovoltaic module from the same hole of the protective cover plate;
The bus bars extending from the same hole are bent in the same direction, and the insulating surfaces of the bus bars extending from the same hole are opposite; the bus bars corresponding to the edge battery strings of the photovoltaic module are bent and then the conductive surfaces face upwards;
The edge battery strings are respectively positioned at the positive and negative ends of the plurality of battery strings which are connected in series or in parallel.
2. The photovoltaic module for EL testing of claim 1, wherein the angled bus bar is less than 45 degrees from the surface of the photovoltaic module.
3. The photovoltaic module for EL testing of claim 1, wherein the bus bar is a tin bar;
The insulating face of the bus bar includes an insulating coating.
4. The photovoltaic module for EL testing of claim 1, wherein the bus bar is a black bus bar.
5. The photovoltaic module for EL testing as recited in claim 1, wherein the plurality of holes are located at a centerline of the photovoltaic module back protective cover plate.
6. An EL tester is characterized by comprising a transmission assembly, a camera and a pressing conductive head;
the conveyor belt is used for conveying the photovoltaic module to be tested;
The camera is used for photographing the photovoltaic module to be tested in the view finding area;
The pressing conductive head can move up and down in the direction perpendicular to the conveying surface of the conveying component and is used for being lowered to a preset height to be in contact with the conductive surface of the bus bar of the edge battery string on the photovoltaic component to be tested, so that the EL tester and the photovoltaic component to be tested form an EL test loop;
The edge battery strings are battery strings positioned at the positive and negative ends of a plurality of battery strings connected in series or in parallel.
7. The EL tester as claimed in claim 6, wherein the front end of the depressing conductive head includes a contact plate extending in a direction perpendicular to the moving direction of the depressing conductive head.
8. The EL tester of claim 6, wherein the camera viewing area covers only a single cell string area of the photovoltaic module under test.
9. The EL tester of claim 6 including a plurality of sets of said push-down conductive heads;
The number of the groups of the pressing conductive heads is one half or equal to the number of the battery strings.
10. The EL tester of claim 7, wherein the contact plate is a rectangular contact plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322932374.4U CN221079938U (en) | 2023-10-31 | 2023-10-31 | A photovoltaic module and EL tester for EL test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322932374.4U CN221079938U (en) | 2023-10-31 | 2023-10-31 | A photovoltaic module and EL tester for EL test |
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| Publication Number | Publication Date |
|---|---|
| CN221079938U true CN221079938U (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322932374.4U Active CN221079938U (en) | 2023-10-31 | 2023-10-31 | A photovoltaic module and EL tester for EL test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221079938U (en) |
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2023
- 2023-10-31 CN CN202322932374.4U patent/CN221079938U/en active Active
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