Solar cell welding device

Abstract

The utility model provides a solar cell welding device. The solar battery welding device comprises a welding mechanism and a purging mechanism, wherein the welding mechanism is used for welding a battery cutting blade. The blowing mechanism comprises at least one air blowing pipe, an air outlet of the air blowing pipe is formed in front of the welding mechanism and faces the conveying path of the battery cutting piece, and the air blowing pipe is used for blowing the battery cutting piece before welding. The solar battery welding device can solve the problem that the battery cutting piece is mistakenly recognized as a defective product, and the production yield is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell technical field especially relates to a solar cell welding device. BACKGROUND

[0002] A solar cell is a device capable of absorbing solar energy and directly converting it into electrical energy. During the production process, the solar cell usually needs to go through processes such as scribing, welding, and laminating to make photovoltaic modules for practical application.

[0003] The scribing and welding processes are usually completed in a welding machine. In the scribing process, laser cutting or mechanical cutting is usually used to cut larger cell pieces into smaller cell cutting pieces. Before the cell cutting pieces are welded, the cell cutting pieces need to be detected to pick out the defective pieces. In the traditional technology, the cell cutting pieces are usually detected by taking pictures and obtaining appearance information. If the appearance information is normal, the cell cutting piece is sent to the subsequent welding process. If the appearance information is abnormal, the cell cutting piece is picked out. In this detection process, the problem of cell cutting pieces being misidentified as defective products and picked out frequently occurs, resulting in a significant decrease in production yield. SUMMARY

[0004] Therefore, to solve the problems in the background art, the present disclosure provides a solar cell welding device to improve the problem of cell cutting pieces being misidentified as defective products and improve the production yield.

[0005] Some embodiments of the present disclosure provide a solar cell welding device, which includes a welding mechanism and a blowing mechanism, the welding mechanism is used for welding cell cutting pieces;

[0006] The blowing mechanism includes at least one blowing pipe, the gas outlet of the blowing pipe is arranged before the welding mechanism and faces the transmission path of the cell cutting piece, and the blowing pipe is used for blowing the cell cutting piece before welding.

[0007] In some embodiments of the present disclosure, the blowing mechanism includes a plurality of blowing pipes, and the gas outlets of the plurality of blowing pipes are arranged side by side and spaced apart.

[0008] In some embodiments of the present disclosure, in the plurality of blowing pipes, the spacing between the two adjacent gas outlets is 0.5cm-2cm; and / or,

[0009] The caliber of a single gas outlet is 1mm-10mm.

[0010] In some embodiments of the present disclosure, the gas outlet is circular or elliptical.

[0011] In some embodiments of the present disclosure, the battery cutting piece comprises a plurality of parallel grid line electrodes, and the grid line electrodes are provided with electrode spacing areas and a plurality of parallel electrode spacing areas; the electrode spacing areas are located between two adjacent grid line electrodes; a plurality of the blowing pipes correspond to a plurality of the electrode spacing areas one by one, and the air outlet of each blowing pipe is located directly above the corresponding electrode spacing area when the battery cutting piece is located below the blowing mechanism.

[0012] In some embodiments of the present disclosure, the blowing mechanism further comprises a gas supply member, the gas supply member is connected to the air inlets of a plurality of the blowing pipes at the same time, and the gas supply member is used to provide gas into a plurality of the blowing pipes.

[0013] In some embodiments of the present disclosure, the solar cell welding device further comprises a cutting mechanism and a transmission mechanism, the cutting mechanism is used to cut the battery raw piece to form the battery cutting piece, the cutting mechanism is arranged before the welding mechanism, and the transmission mechanism is arranged between the cutting mechanism and the welding mechanism, and the transmission mechanism is used to transmit the battery cutting piece located at the cutting mechanism to the welding mechanism.

[0014] In some embodiments of the present disclosure, the solar cell welding device further comprises a support frame, the support frame is arranged between the cutting mechanism and the welding mechanism, and the support frame is arranged above the transmission mechanism, and the blowing mechanism is fixedly arranged on the support frame.

[0015] In some embodiments of the present disclosure, the solar cell welding device further comprises a visual detection mechanism.

[0016] The visual detection mechanism is arranged between the cutting mechanism and the welding mechanism, the visual detection mechanism is used to detect defects on the surface of the battery cutting piece before welding, and the blowing mechanism is arranged before the visual detection mechanism.

[0017] In some embodiments of the present disclosure, the blowing mechanism has a plurality of blowing mechanisms, and the plurality of blowing mechanisms are sequentially arranged along the transmission path of the battery cutting piece.

[0018] In actual process, a large amount of heat is generated when cutting the battery piece, and a large amount of debris may also be generated, so water flushing is often used to flush the surface of the battery piece at the same time. The present inventors have found through research that the water stains remaining on the surface of the battery cutting piece are the main reason for the battery cutting piece being misidentified as defective products.

[0019] The solar cell welding device provided by the present disclosure comprises a welding mechanism and a blowing mechanism, the welding mechanism is used for welding a cell cutting piece, and the blowing mechanism comprises at least one blowing pipe used for blowing the cell cutting piece before welding. By blowing the surface of the cell cutting piece through the blowing pipe, the water stain remaining on the surface of the cell cutting piece can be reduced, so that the probability of the cell cutting piece being mistakenly regarded as a defective product due to the surface remaining water stain is reduced. Therefore, the solar cell welding device can improve the problem of the cell cutting piece being mistakenly identified as a defective product and improve the production yield. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a solar cell welding device.

[0021] Figure 2 It is a structural schematic diagram of a solar cell being blown by the blowing mechanism in Figure 1

[0022] The reference signs and their meanings are as follows:

[0023] 100, blowing mechanism; 110, blowing pipe; 120, gas supply part; 200, welding mechanism; 300, cell cutting piece; 310, grid line electrode; 320, electrode interval area; 400, cutting mechanism; 500, conveying mechanism; 600, visual detection mechanism; 700, support frame. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application will be described more comprehensively in combination with the embodiments and effect diagrams. The embodiments give the preferred embodiments of the present application. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as "fixed" to another element, it can be directly fixed to the other element or can be fixed to the other element through an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element between the two elements. In addition, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or it can be detachable connection, or it can be integrated connection. For example, it can be mechanical connection, or it can be electrical connection. For example, it can be direct connection, or it can be indirect connection through an intermediate element, or it can be internal communication of two elements. It should be understood that those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances, and no ambiguity will be caused.​

[0026] Unless otherwise specified, in the description of the present invention, terms indicating orientation or positional relationships such as “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the orientation or positional relationships shown in the drawings of the utility model. They are only for the convenience and simplification of the description of the content of the utility model and to help readers understand it in conjunction with the drawings. They do not limit or imply that the device or element referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit the implementation of this invention. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. "More" herein includes combinations of two or more than two items.

[0028] As discussed in the background, battery slices are frequently mistakenly identified as defective and rejected during the inspection process. In actual production, cutting battery slices generates significant heat and may also produce a significant amount of debris. Therefore, it is often necessary to rinse the surface of the cell with water while cutting. The inventors of this disclosure have discovered that residual water stains on the surface of battery slices are the primary cause of them being mistakenly identified as defective.

[0029] Among some possible solutions, the preheating temperature of the battery original sheet can be increased before the dicing process to reduce the amount of water output during the dicing process, thereby reducing water stains on the surface of the battery cut sheet. However, this will lead to the problem of poor batch dicing, and the actual production yield cannot be significantly improved.

[0030] Based on this, the present disclosure provides a solar cell welding device. The device includes a welding mechanism and a purge mechanism. The welding mechanism is used to weld cut cell wafers. The purge mechanism includes at least one air blow pipe, the air outlet of which is located before the welding mechanism and faces the transport path of the cut cell wafers. The air blow pipe is used to purge the cut cell wafers before welding.

[0031] The solar cell welding device provided herein includes a welding mechanism and a purging mechanism. The welding mechanism is used to weld cut cell wafers. The purging mechanism includes at least one air blowpipe, which is used to purge the cut cell wafers before welding. By using the air blowpipe to purge the surface of the cut cell wafers, residual water stains on the surface of the cut cell wafers can be reduced, thereby reducing the probability of the cut cell wafers being mistakenly identified as defective due to residual water stains on the surface. Therefore, the solar cell welding device can alleviate the problem of cut cell wafers being mistakenly identified as defective products and improve production yield.

[0032] Figure 1 This is a schematic diagram of the structure of a solar cell welding device disclosed in the present invention. Figure 1 As shown, the solar cell includes a welding mechanism 200 and a purge mechanism 100 , and the welding mechanism 200 is used to weld the cell cut pieces 300 . Figure 2 for Figure 1 Schematic diagram of the structure of the purge mechanism 100 for purging the solar cell. Figure 1 and Figure 2 As shown, the purge mechanism 100 includes at least one air blow pipe 110. The air outlet of the air blow pipe 110 is arranged in front of the welding mechanism 200 and faces the transmission path of the battery cut pieces 300. Furthermore, the air outlet of the air blow pipe 110 is located above the transmission path of the battery cut pieces 300. The air blow pipe 110 is used to purge the battery cut pieces 300 before welding.

[0033] It is understood that the cell cut sheet 300 refers to the solar cell sheet formed after the cell original sheet has been diced. After the dicing process, the cell cut sheet 300 needs to be transferred to the welding mechanism 200 for welding. The path that the cell cut sheet 300 passes through during this process is its transmission path, which is located in the solar cell welding device. The air outlet of the air blow pipe 110 faces the transmission path of the cell cut sheet 300, so the air blown from the air blow pipe 110 can sweep the surface of the cell cut sheet 300, thereby blowing away water stains from the surface of the cell cut sheet 300.

[0034] Reference Figure 2 As shown in FIG. 1 , as an example of this embodiment, a cell cutting sheet 300 includes a plurality of parallel gate electrodes 310 and a plurality of electrode spacing regions 320, wherein the electrode spacing regions 320 are located between two adjacent gate electrodes 310. The gate electrodes 310 are generally protruding from the surface of the cell cutting sheet 300, and the surface of the electrode spacing region 320 between two adjacent gate electrodes 310 is lower than the surface of the gate electrodes 310. This results in more water stains remaining in the electrode spacing regions 320 and making them difficult to remove.

[0035] As a further example of this embodiment, the grid line electrodes 310 on both sides of the electrode spacing region 320 are the main grid electrodes of the battery cutting sheet 300.

[0036] Referring to Figure 2 As an example of this embodiment, the blowing mechanism 100 includes a plurality of blowing tubes 110, and the air outlets of the plurality of blowing tubes 110 are arranged side by side and at intervals.

[0037] In this example, when the battery cutting sheet 300 is blown, the blowing gas blown by the plurality of blowing tubes 110 with air outlets arranged side by side and at intervals can more comprehensively and uniformly cover the surface of the battery cutting sheet 300, thereby improving the removal ability of the blowing mechanism 100 for water stains on the adjacent electrode spacing region 320. Therefore, the blowing mechanism 100 of this example is beneficial to reduce the residual water stains on the surface of the battery cutting sheet 300 and further reduce the probability of misidentification of the battery cutting sheet 300.

[0038] As an example of this embodiment, the interval between the adjacent two air outlets of the plurality of blowing tubes 110 is 0.5cm~2cm. In some examples, the interval between the adjacent two air outlets is 0.5cm, 0.6cm, 0.7cm, 0.8cm, 1cm, 1.2cm, 1.4cm, 1.6cm, 1.8cm, 2cm, or the interval between the adjacent two air outlets can also be between any two of the above intervals.

[0039] In this example, the positions of the plurality of air outlets with the above interval are more suitable between the plurality of electrode spacing regions 320, thereby being able to more effectively remove the residual water stains on the surface of the electrode spacing region 320. Moreover, the interval between the adjacent two air outlets in the above range is also beneficial to reduce the interference between the gases blown by the adjacent two air outlets, so that each air outlet can provide stronger blowing ability.

[0040] As an example of this embodiment, the caliber of a single air outlet is 1mm~10mm. In some examples, the caliber of a single air outlet is 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, or the caliber of a single air outlet can also be between any two of the above calibers.

[0041] In this example, the caliber of the air outlet is more matched with the width of the electrode spacing region 320, and the concentration of the blown gas is higher, and the removal ability for residual water stains is stronger.

[0042] It can be understood that the size of the above blowing mechanism 100 corresponds to the grid line electrodes 310 and the electrode spacing region 320 on the surface of the battery cutting sheet 300, so the blowing mechanism 100 is very suitable for removing the residual water stains on the surface of the battery cutting sheet 300.

[0043] As an example of this embodiment, the gas outlets are circular or elliptical. It can be understood that in other examples, the gas outlets can also be regular polygons or irregular patterns. Among them, the regular polygons can be equilateral triangle, rectangle, regular pentagon or regular hexagon, etc., and the irregular patterns can be irregular polygons.

[0044] In this example, compared with other regular polygons or irregular patterns, the gas sprayed by the circular or elliptical gas outlets is more uniform and concentrated, which is beneficial to provide better water stain removal capability.

[0045] Referring to Figure 2 As an example of this embodiment, a plurality of blowing pipes 110 correspond to a plurality of electrode spacing areas 320 one by one, and when the battery cutting sheet 300 is located below the blowing mechanism 100, the gas outlet of each blowing pipe is located directly above the corresponding electrode spacing area 320.

[0046] It can be understood that the battery cutting sheet 300 is moved along a fixed transmission path to the lower side of the blowing mechanism 100, so the movement path of the grid line electrode 310 on the battery cutting sheet 300 and the electrode spacing area 320 is also fixed. In this example, the gas outlet is arranged to be directly above the corresponding electrode spacing area 320, so that the plurality of gas outlets can simultaneously blow the plurality of electrode spacing areas 320, which is beneficial to save the blowing time of the battery cutting sheet 300 and ensure the transmission efficiency of the battery cutting sheet 300.

[0047] Referring to Figure 2 As a further example of this embodiment, when the battery cutting sheet 300 is located below the blowing mechanism 100, the parallel direction of the gas outlets of the plurality of blowing pipes 110 is parallel to the parallel direction of the plurality of electrode spacing areas 320.

[0048] Referring to Figure 2 As an example of this embodiment, the blowing mechanism 100 further comprises a gas supply member 120, the gas supply member 120 is connected to the gas inlets of the plurality of blowing pipes 110 at the same time, and the gas supply member 120 is used to provide gas to the plurality of blowing pipes 110.

[0049] In this example, one gas supply member 120 is used to supply gas to the plurality of blowing pipes 110 at the same time, which can save the volume of the blowing mechanism 100 and reduce its complexity on the one hand, and can also ensure that the gas sprayed by the gas outlets of the plurality of blowing pipes 110 has basically the same flow rate and impact force, so that the stress of the battery cutting sheet 300 when being blown is more uniform, avoiding the displacement of the battery cutting sheet 300 during transmission.

[0050] As a further example of this embodiment, the gas supply 120 can include an intake pipe, an outlet of which is connected to the inlets of the plurality of blow pipes 110, and an inlet of which is used to connect to an external air blower or a high-pressure gas source.

[0051] Referring to Figure 2 As a further example of this embodiment, the blow direction of the blow pipe 110 is vertically downward, as shown in FIG. 1 1. Figure 2 The dashed arrow in FIG. 1 1 indicates the blow direction of the blow pipe 110. The blow pipe 110 can extend in the vertical direction so that the gas blown out of the outlet is vertically downward. Figure 2 The solid arrow in FIG. 1 1 indicates the transport direction of the battery cut sheet.

[0052] Referring to Figure 1 As an example of this embodiment, the solar cell welding device further includes a sheet cutting mechanism 400 and a transport mechanism 500, the sheet cutting mechanism 400 being used to cut the battery raw sheet to form the battery cut sheet 300, the sheet cutting mechanism 400 being disposed before the welding mechanism 200, and the transport mechanism 500 being disposed between the sheet cutting mechanism 400 and the welding mechanism 200, the transport mechanism 500 being used to transport the battery cut sheet 300 located at the sheet cutting mechanism 400 to the welding mechanism 200. It can be understood that the transport path of the battery cut sheet 300 is between the sheet cutting mechanism 400 and the welding mechanism 200, and the transport mechanism 500 is used to move the battery cut sheet 300 along its transport path.

[0053] As an example of this embodiment, the transport mechanism 500 can include a conveyor belt, which is used to carry and move the battery cut sheet 300. Preferably, the extension direction of the conveyor belt is the same as the transport path.

[0054] As an example of this embodiment, the sheet cutting mechanism 400 can include a laser, which is used to cut the battery raw sheet by means of laser scanning, and form a plurality of battery cut sheets 300.

[0055] As an example of this embodiment, the sheet cutting mechanism 400 can further include a spraying member, which is used to spray cleaning liquid towards the battery cut sheet 300 during cutting, the cleaning liquid can include deionized water, to play a cooling role and a cleaning role.

[0056] Referring to Figure 1As shown in the embodiment, the solar cell welding device further comprises a support frame 700, which is arranged between the scribing mechanism 400 and the welding mechanism 200, and is arranged above the conveying mechanism 500, and the blowing mechanism 100 is fixedly arranged on the support frame 700. By adding the support frame 700 and fixing the blowing mechanism 100 on the support frame 700, the welding mechanism 200 and the scribing mechanism 400 do not need to be modified, and the welding device is more suitable for the existing welding device.

[0057] Referring to Figure 1 As shown in the embodiment, the solar cell welding device further comprises a visual inspection mechanism 600. The visual inspection mechanism 600 is arranged between the scribing mechanism 400 and the welding mechanism 200, and is used for defect detection of the surface of the cell cutting piece 300 before welding. The blowing mechanism 100 is arranged before the visual inspection mechanism 600.

[0058] As a further example of the embodiment, the visual inspection mechanism 600 can include a CCD camera for photographing the surface topography of the cell cutting piece 300. The visual inspection mechanism 600 can also include an image analysis component (such as a computer) for analyzing the photos taken by the CCD camera.

[0059] Referring to Figure 1 As shown in the embodiment, the blowing mechanism 100 is multiple, and the multiple blowing mechanisms 100 are arranged in sequence along the conveying path of the cell cutting piece 300. By arranging multiple blowing mechanisms 100 along the conveying path of the cell cutting piece 300, the cell cutting piece 300 can be blown multiple times, which is beneficial to further reduce the residual of water stains on the surface of the cell cutting piece 300 and reduce the residence time of the cell cutting piece 300 during transmission.

[0060] As Figure 1 The solar cell welding device shown can be used in the following manner.

[0061] The battery wafer is placed in the scribing mechanism 400, and the battery wafer is scribed to form a plurality of battery cutting wafers 300. Then, the conveying mechanism 500 drives the battery cutting wafer 300 to move along the conveying path, and stops for a preset time when the battery cutting wafer 300 reaches below the blowing mechanism 100, and the plurality of blowing pipes 110 of the blowing mechanism 100 are supplied with gas through the gas supply piece 120, the gas is blown out from the gas outlets of the blowing pipes 110 and blows the surface of the battery cutting wafer 300, and the water stains remaining in the electrode spacing area 320 are removed. Then the conveying mechanism 500 continues to drive the battery cutting wafer 300 to move along the conveying path and reaches the visual inspection mechanism 600 for detection. The visual inspection mechanism 600 takes a photo of the battery cutting wafer 300 and detects whether the surface topography meets the requirements. When the detection result meets the requirements, the detection is passed, and the battery cutting wafer 300 is continuously conveyed to the welding mechanism 200 for welding treatment. Since the water stains on the surface of the battery cutting wafer 300 are removed, the probability that the battery cutting wafer is mistakenly considered as a defective product due to the surface residual water stains can be effectively reduced.

[0062] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present disclosure.

[0063] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A solar cell welding apparatus characterized by comprising: The solar cell welding device comprises a welding mechanism (200) and a blowing mechanism (100), the welding mechanism (200) is used for welding a battery cutting piece (300); The blowing mechanism (100) comprises at least one blowing pipe (110), the gas outlet of the blowing pipe (110) is arranged before the welding mechanism (200) and faces the transmission path of the battery cutting piece (300), and the blowing pipe (110) is used for blowing the battery cutting piece (300) before welding.

2. The solar cell welding apparatus according to claim 1, wherein The blowing mechanism (100) comprises a plurality of blowing pipes (110), and the gas outlets of the plurality of blowing pipes (110) are arranged in parallel and at intervals.

3. The solar cell welding apparatus according to claim 2, wherein In the plurality of blowing pipes (110), the interval between the two adjacent gas outlets is 0.5cm-2cm; and / or, The caliber of the single gas outlet is 1mm-10mm.

4. The solar cell welding apparatus according to claim 3, wherein The gas outlet is circular or elliptical.

5. The solar cell soldering apparatus according to claim 2, wherein The battery cutting piece (300) comprises a plurality of parallel grid line electrodes (310) and a plurality of parallel electrode interval areas (320), and the electrode interval area (320) is located between the two adjacent grid line electrodes (310); The plurality of blowing pipes (110) correspond to the plurality of electrode interval areas (320) one by one, and when the battery cutting piece (300) is located below the blowing mechanism (100), the gas outlet of each blowing pipe (110) is located directly above the corresponding electrode interval area (320).

6. The solar cell soldering apparatus according to claim 5, wherein The blowing mechanism (100) further comprises a gas supply member (120), the gas supply member (120) is connected to the gas inlets of the plurality of blowing pipes (110) at the same time, and the gas supply member (120) is used for supplying gas to the plurality of blowing pipes (110).

7. The solar cell soldering apparatus according to any one of claims 1 to 6, characterized by The solar cell welding device further comprises a cutting mechanism (400) and a transmission mechanism (500), the cutting mechanism (400) is used for cutting a battery original piece to form the battery cutting piece (300), the cutting mechanism (400) is arranged before the welding mechanism (200), the transmission mechanism (500) is arranged between the cutting mechanism (400) and the welding mechanism (200), and the transmission mechanism (500) is used for transmitting the battery cutting piece (300) located at the cutting mechanism (400) to the welding mechanism (200).

8. The solar cell soldering apparatus according to claim 7, wherein The solar cell welding device further comprises a support frame (700), the support frame (700) is arranged between the cutting mechanism (400) and the welding mechanism (200), and the support frame (700) is arranged above the transmission mechanism (500), and the blowing mechanism (100) is fixedly arranged on the support frame (700).

9. The solar cell soldering apparatus according to claim 7, wherein The solar cell welding device further comprises a visual detection mechanism (600); The visual detection mechanism (600) is arranged between the cutting mechanism (400) and the welding mechanism (200), and is used for detecting defects on the surface of the battery cutting piece (300) before welding.

10. The solar cell welding apparatus according to any one of claims 1 to 6 and 8 to 9, characterized by The blowing mechanism (100) is arranged in sequence along the transmission path of the battery cutting piece (300).

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