CN111554589A - Detection device and method for crystalline silicon solar cell - Google Patents
Detection device and method for crystalline silicon solar cell Download PDFInfo
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- CN111554589A CN111554589A CN202010541118.0A CN202010541118A CN111554589A CN 111554589 A CN111554589 A CN 111554589A CN 202010541118 A CN202010541118 A CN 202010541118A CN 111554589 A CN111554589 A CN 111554589A
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- 238000001514 detection method Methods 0.000 title claims abstract description 66
- 229910021419 crystalline silicon Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000011521 glass Substances 0.000 claims abstract description 36
- 238000004088 simulation Methods 0.000 claims abstract description 21
- 238000003475 lamination Methods 0.000 claims abstract description 20
- 238000007689 inspection Methods 0.000 claims abstract description 14
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- 238000002834 transmittance Methods 0.000 claims abstract description 7
- 239000002313 adhesive film Substances 0.000 claims description 19
- 238000005538 encapsulation Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 11
- 238000010030 laminating Methods 0.000 claims description 4
- 238000012858 packaging process Methods 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 239000010703 silicon Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 235000012431 wafers Nutrition 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000009432 framing Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000005338 frosted glass Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
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Abstract
The embodiment of the disclosure relates to a detection device and a detection method for a crystalline silicon solar cell. The detection device is characterized in that the assembly packaging glass, the EVA and the ultrathin high-transmittance glass are solidified together through lamination to form a transparent detection assembly, a sample to be detected is arranged below the detection assembly and on the bottom plate, the sample to be detected is clamped in the detection device through the handle, the detection assembly simulates the appearance and the color of the sample wafer behind the assembly, and the simulation effect is real and reliable. The embodiment of the disclosure can rapidly identify the appearance and color of finished batteries, coated silicon wafers and the like after being manufactured into components, so as to adjust the battery process and the inspection standard in time and greatly improve the working efficiency.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of crystalline silicon solar cells and assemblies, in particular to a detection device and a detection method for a crystalline silicon solar cell.
Background
Solar photovoltaic utilization is the most rapidly and energetically developed research field in recent years, and is also the dominant industry in China that can participate in international competition. Solar energy is a reliable and sustainable clean energy, will occupy the important seat of world energy consumption in the future, and will not only replace part of conventional energy, but also become the main body of world energy supply. It is expected that renewable energy will account for more than 30% of the total energy structure by 2030, and solar photovoltaic power generation will also account for more than 10% of the world's total power supply.
The photovoltaic industrial chain mainly comprises a silicon material, an ingot (a pull rod), a slice, a battery piece, a battery assembly, an application system and the like. Although the cell and the component belong to the midstream manufacturing link, the common cell workshop and the component workshop are separately constructed and are not in a factory building, and the cell is equivalent to the raw material of the component. In the assembly process, the EVA and the packaging glass are added on the upper surface of the battery piece, and the EVA adheres the battery, the packaging glass and the like together after lamination, so that the functions of packaging the battery and enhancing the light transmission of the assembly are achieved. The EVA and the encapsulating glass which are not laminated and cured are merely laminated together, and thus the transparency is poor, and the appearance details of the cell sheet below cannot be seen visually like frosted glass. Under the influence of the thickness, transparency, refractive index and other factors of the EVA and the packaging glass, the appearance and color of the cell piece can be changed after the assembly is packaged through lamination and curing, so that the appearance and color of the same cell piece before and after the assembly is made are different, and the difference exists.
In the related art, a detection device capable of rapidly detecting the appearance of a solar module before the module is assembled is not provided. With the development of the industry, some customers have new requirements on the colors of the assembled batteries, such as colored batteries, mono-crystal-like black batteries and the like, and the colors of the assembled batteries can be confirmed only after the assembly is laminated, so that the assembly is very inconvenient, time-consuming and labor-consuming. It is significant whether the appearance and color of the battery after the lamination of the components can be directly confirmed in a battery shop without the lamination of the components.
The inventor finds that at least some of the following technical problems need to be solved: for example, the appearance and color of the solar cell need to be finally confirmed after the assembly is laminated, so that great inconvenience is brought to the appearance and color debugging of the solar cell, samples are damaged in most cases, assembly packaging materials are wasted, assembly production capacity is occupied, and inconvenience and waste are caused.
Accordingly, there is a need to ameliorate one or more of the problems with the related art solutions described above.
It is noted that this section is intended to provide a background or context to the inventive concepts recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
An object of the embodiments of the present disclosure is to provide an inspection apparatus for crystalline silicon solar cells, thereby overcoming, at least to some extent, one or more problems due to limitations and disadvantages of the related art.
According to a first aspect of the embodiments of the present disclosure, there is provided a detection apparatus for a crystalline silicon solar cell, including:
the detection assembly is placed right above a sample to be detected, the detection assembly comprises a simulation layer and an encapsulation layer arranged below the simulation layer, and the simulation layer and the encapsulation layer are integrally cured through lamination;
the simulation layer is used for simulating components contained in the solar cell module and placed above the crystalline silicon cell piece, and the packaging layer has perspective property.
In an embodiment of the disclosure, the analog layer includes photovoltaic glass and a transparent adhesive film, the photovoltaic glass is disposed above the transparent adhesive film, and the transparent adhesive film is disposed between the photovoltaic glass and the packaging layer.
In an embodiment of the present disclosure, the encapsulation layer is an ultra-thin high-transmittance glass.
In one embodiment of the present disclosure, a handle is provided at an end of the detection assembly.
In an embodiment of the present disclosure, the apparatus further includes a bottom plate, where the bottom plate is disposed below the detection assembly and used for placing a sample to be detected.
In one embodiment of the present disclosure, the bottom plate is a flat piece of glass.
In an embodiment of the present disclosure, the bottom plate is the detection assembly.
In one embodiment of the present disclosure, a handle is provided at an end of the base plate.
In an embodiment of the present disclosure, the detecting device further includes a connecting member, and the connecting member is respectively connected to the detecting component and the same end of the bottom plate.
In an embodiment of the present disclosure, the connecting member is a hinge structure.
According to a second aspect of the embodiments of the present disclosure, there is provided a method for detecting a crystalline silicon solar cell, including:
curing the encapsulation process of the simulated solar cell module by laminating the simulation layer and the package layer which can be seen through; the front surface of the crystalline silicon solar cell is attached to the lower surface of the packaging layer, so that the appearance of the crystalline silicon solar cell packaged into a solar cell module is simulated; and observing whether the appearance of the sample to be detected is qualified or not through the detection assembly.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in the embodiment of the disclosure, by the method and the device, on one hand, the shape and the color of the packaged solar cell module can be detected before the solar cell module is packaged, so that the detection efficiency is greatly improved; on the other hand, the loss caused by debugging the solar module is avoided, so that the production capacity is improved, and the waste of cost is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 shows a schematic top view of a detection apparatus in an exemplary embodiment of the invention;
FIG. 2 shows a schematic front view of a detection device in an exemplary embodiment of the invention;
FIG. 3 shows a schematic front view of another detection apparatus in an exemplary embodiment of the invention;
FIG. 4 shows a schematic top view of another inspection device in an exemplary embodiment of the invention;
FIG. 5 shows a schematic side view of another inspection device in an exemplary embodiment of the invention;
FIG. 6 shows a schematic side view of another inspection device in an exemplary embodiment of the invention;
FIG. 7 is a schematic view of a test sample placement of a test device in an exemplary embodiment of the invention;
FIG. 8 is a schematic diagram illustrating the detection of a sample to be tested by the detection device in an exemplary embodiment of the invention;
description of reference numerals: the device comprises a detection assembly 100, a simulation layer 110, photovoltaic glass 111, a transparent adhesive film 112, an encapsulation layer 120, a bottom plate 200, a handle 300, a connecting piece 400 and a sample 500 to be detected.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of embodiments of the invention, which are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
The exemplary embodiment first provides a detection device for a crystalline silicon solar cell. Referring to fig. 1, the detection device includes a detection assembly 100, the detection assembly 100 is placed over a sample 500 to be detected, the detection assembly 100 includes a simulation layer 110 and an encapsulation layer 120 disposed under the simulation layer 110, and the simulation layer 110 and the encapsulation layer 120 are integrally cured by lamination. It should be understood that the detection assembly 100 achieves rapid detection of the shape and color of the battery piece after being packaged by the lamination by simulating the shape and color of the battery piece after being packaged by the lamination. During detection, the crystalline silicon solar cell (i.e. the sample 500 to be detected) is arranged below the detection assembly, and the front side of the crystalline silicon solar cell is attached to the detection assembly, so that the simulation effect can be achieved, and the appearance and the color of the cell can be detected quickly.
In one embodiment, referring to the illustration in fig. 1-2, the simulation layer 110 is used to simulate components contained in a solar cell assembly placed over a crystalline silicon cell sheet. Preferably, the simulation layer 110 includes a photovoltaic glass 111 and a transparent adhesive film 112. It should be understood that the solar cell module generally includes photovoltaic glass, transparent adhesive film, crystalline silicon solar cell (also called cell slice) and back plate, which are laminated and then packaged. However, the present invention is not limited thereto, and the solar cell module may have other laminated members as long as the detection module can simulate the state of the member above the cell sheet after lamination.
In one embodiment, the encapsulation layer 120 is transparent. Preferably, the encapsulation layer 120 is made of ultra-thin high-transmittance glass. It should be understood that the transparent adhesive film EVA and the photovoltaic glass used for manufacturing the detection assembly 100 are both materials used for assembly industrialization, and the added layer of ultrathin high-transmittance glass has no influence on the appearance and color of the sample, so that the situation that the simulation result is not ideal due to the use of other materials is avoided.
By the detection device for the crystalline silicon solar cell, on one hand, the shape and color of the packaged solar cell can be detected before the solar cell module is packaged, so that the detection efficiency is greatly improved; on the other hand, the loss caused by debugging the solar module is avoided, so that the production capacity is improved, and the waste of cost is reduced.
Next, each part of the above-described detection apparatus for a solar cell module in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 8.
In one embodiment, referring to FIG. 4, the end of the detection assembly 100 is provided with a handle 300. It should be understood that one handle 300 may be disposed at one end of the detection assembly 100, and two handles 300 may be disposed at both ends of the detection assembly 100. The specific number of handles 300 is not limited, but is provided for ease of handling and manipulation.
In one embodiment, referring to fig. 7, the testing apparatus further comprises a bottom plate 200, wherein the bottom plate 200 is disposed below the testing assembly 100 for placing a sample 500 to be tested. In operation, the sample 500 to be tested is sandwiched between the testing assembly 100 and the base plate 200, which is more convenient for observation and operation.
In one embodiment, referring to FIG. 7, the base plate 200 is a flat piece of glass. It should be understood that the base plate 200 may be glass or other materials. But merely for placing and holding the sample 500 to be tested for ease of handling. The glass is adopted to facilitate observation and detection, so that observation errors caused by other colors can be prevented.
In one embodiment, the base plate 200 is the inspection assembly 100. After the detection assembly 100 is adopted as the bottom plate 200, the detection device can realize simultaneous observation and detection of the front side and the back side. It should be understood that when the test assembly is used as a base plate, the test assembly should be placed upside down, i.e., upside down. That is, the detecting device comprises two opposite detecting components, and the two detecting components are mutually bottom plates. During detection, the battery piece is placed between the two detection assemblies, and the front side and the back side of the battery piece are detected simultaneously.
In one embodiment, the end of the base plate 200 is provided with a handle 300. It should be understood that one handle 300 may be provided at one end of the base plate 200, and two handles 300 may be provided at both ends of the base plate 200. The specific number of handles 300 is not limited, but is provided for ease of handling and manipulation.
In one embodiment, referring to fig. 5, a connector 400 is further included, and the connector 400 is connected to the same end of the detection assembly 100 and the base plate 200, respectively. For connecting the sensing assembly 100 and the base plate 200. Preferably, the connector 400 is of a hinge structure. It should be appreciated that the relative positions of the detection assembly 100 and the base plate 200 can be fixed by the connector 400, which is more convenient for operation.
In one specific example, referring to fig. 3-6, an inspection assembly 100 is fabricated, for example, by laminating and curing photovoltaic glass, EVA, and an ultra-thin high-transmittance glass layer; the connecting member 400 and the handle 300 are adhered to the detecting assembly 100 and the base plate 200 by strong adhesion, and the connecting member 400 and the handle 300 are located at opposite sides to constitute the detecting device of the present disclosure.
In a specific example, referring to fig. 7-8, for example, a silicon wafer of a single-crystal silicon solar cell and a silicon wafer of a polycrystalline silicon solar cell are respectively placed under the detection assembly 100, the front side faces the detection assembly 100, a sample 500 to be detected is clamped between the detection assembly 100 and the base plate 200 through the handle 300, the appearance and the color of the sample wafer after assembly are simulated by observing the detection assembly, compared with the lamination of the assembly, the effect is vivid, and if the sample is not damaged, some alcohol or water is added on the silicon wafer or the silicon wafer, the simulation effect is better.
In the present exemplary embodiment, there is also provided a method for detecting a crystalline silicon solar cell, which is shown in fig. 1-2 and includes: simulating the packaging process of the solar cell module by laminating and curing the simulation layer 110 and the transparent packaging layer 120; the front surface of the crystalline silicon solar cell is attached to the lower surface of the packaging layer 120, so that the appearance of the crystalline silicon solar cell after being packaged into a solar cell module is simulated; and whether the appearance of the sample 500 to be tested is qualified is observed through the detection assembly 100. It should be understood that the packaging process of the solar cell module mainly includes: lamination, trimming and framing. The lamination layer should ensure that the relative position of each layer lays a good foundation for the next lamination, and the layers are generally laid by photovoltaic glass, a transparent adhesive film, a crystalline silicon solar cell, a transparent adhesive film and a back plate. The detection assembly 100 is preferably the same photovoltaic glass, the same transparent adhesive film, and ultra-thin high-transmittance glass. The lamination process is a key step of solar cell module production, generally, laid layers are put into a laminator, air in each layer is pumped out by vacuumizing, then the transparent adhesive film is heated to melt to bond the photovoltaic glass, the crystalline silicon solar cell and the back panel together, and the solar cell module is taken out after cooling, wherein the lamination temperature and the lamination time are determined according to the properties of the transparent adhesive film. Therefore, the same process is adopted in the lamination process of the detection assembly 100, specifically, the laminated photovoltaic glass, the transparent adhesive film and the ultrathin high-transparency glass are placed in a laminator, air in each layer is pumped out through vacuumizing, then the transparent adhesive film is heated to be melted to bond the photovoltaic glass and the ultrathin high-transparency glass together, and the detection assembly 100 is taken out after cooling. The trimming is to remove burrs formed by outward extension and solidification of the transparent adhesive film under pressure after the transparent adhesive film is melted during lamination. The laminated inspection assembly 100 may also be trimmed to provide a clean and aesthetically pleasing appearance. Framing is similar to framing glass, framing solar modules with aluminum, increasing the strength of the module and further sealing the modules, with the frame and solar module seams filled with silicone. The detection assembly 100 may also be optionally framed, but is not particularly limited thereto.
When the sample 500 to be tested is tested, the front surface of the sample 500 to be tested (crystalline silicon solar cell) is attached to the lower surface of the packaging layer 120 to simulate the appearance of the crystalline silicon solar cell after being packaged into a solar cell module. Therefore, the appearance of the solar cell module assembled by the crystalline silicon solar cells can be directly detected before the crystalline silicon solar cells are assembled into the solar cell module. It should be understood that the appearance of the crystalline silicon solar cell refers not only to its color and shape, such as cracks, chips, color differences, etc., but also includes defects of the surface where scratches, spots, watermarks, etc., are directly observable.
It is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the foregoing description are used for indicating or indicating the orientation or positional relationship illustrated in the drawings, and are used merely for convenience in describing embodiments of the present invention and for simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (10)
1. A detection device for a crystalline silicon solar cell is characterized by comprising:
the detection assembly comprises a simulation layer and an encapsulation layer arranged below the simulation layer, and the simulation layer and the encapsulation layer are integrally cured through lamination;
the simulation layer is used for simulating a component contained above the crystalline silicon solar cell in the solar cell module, and the packaging layer has perspective property.
2. The detection device according to claim 1, wherein the analog layer comprises a photovoltaic glass and a transparent adhesive film, the photovoltaic glass is disposed above the transparent adhesive film, and the transparent adhesive film is disposed between the photovoltaic glass and the encapsulation layer.
3. The detection device according to claim 1, wherein the encapsulation layer is ultra-thin high-transmittance glass.
4. The testing device of claim 1, further comprising a bottom plate disposed below the testing assembly for placement of a sample to be tested.
5. The inspection device of claim 4, wherein the base plate is a flat piece of glass.
6. The inspection device of claim 4, wherein the base plate is the inspection assembly.
7. A testing device according to claim 4 wherein a handle is provided at an end of the base plate and/or at an end of the testing assembly.
8. The inspection device of claim 4, further comprising connectors that are coupled to the same ends of the inspection assembly and the base plate, respectively.
9. The sensing device of claim 8, wherein the connector is a hinge structure.
10. A method for inspecting a crystalline silicon solar cell using the inspection apparatus according to any one of claims 1 to 9, comprising:
simulating the packaging process of the solar cell module by laminating and curing the simulation layer and the transparent packaging layer; the front surface of the crystalline silicon solar cell is attached to the lower surface of the packaging layer, so that the appearance of the crystalline silicon solar cell packaged into a solar cell module is simulated; and observing whether the appearance of the sample to be detected is qualified or not through the detection assembly.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113731863A (en) * | 2021-09-18 | 2021-12-03 | 浙江晶科能源有限公司 | Battery piece sorting equipment and battery piece sorting method |
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