Double-sided heterojunction solar cell copper grid line preparation device and cell production equipment

Abstract

The utility model discloses a double-sided heterojunction solar battery copper grid line preparation device and battery piece production equipment. The preparation device comprises a first surface grid line preparation unit and a second surface grid line preparation unit which are connected in sequence, and the first surface grid line preparation unit and the second surface grid line preparation unit are used for preparing copper grid lines on the two surfaces of a brass sheet in sequence. Each of the first surface grid line preparation unit and the second surface grid line preparation unit comprises a developing machine provided with a developing detection mechanism; the developing detection mechanism comprises a visual detection element used for detecting a copper grid line area formed by the brass sheet. According to the preparation device, the copper grid lines are manufactured on the two faces of the brass sheet in a staged mode, the development detection mechanism conducts timely detection on the grid lines after the grid lines are manufactured and formed on the brass sheet through the first face grid line preparation unit, and unqualified products are prevented from flowing into the second face grid line preparation unit; waste of production materials is avoided, and the yield of battery piece production is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of photovoltaic cells, in particular to a double-sided heterojunction solar cell copper grid line preparation device and a cell piece production equipment. BACKGROUND

[0002] The steps for preparing the copper grid line electrode of the cell piece by adopting the electroplating process include the following: depositing a copper seed layer on the surface of a raw silicon piece to obtain a brass piece, printing photosensitive glue on the surface of the brass piece, drying, and then performing exposure grid line pattern, developing to remove the glue in the grid line part after exposure, so that the copper seed layer is exposed, and then performing electroplating to grow the grid line on the copper seed layer. The preparation of the copper grid line electrode of the double-sided heterojunction solar cell needs to prepare the copper grid line electrode on both sides of the raw silicon piece. In the prior art, the preparation system of the copper grid line electrode of the double-sided heterojunction solar cell includes a coating device, a printing device and a developing device; the coating device is used for double-sided coating of the brass piece, and the printing device is used for double-sided printing and developing of the brass piece coated by the coating device. Although the existing preparation system can improve the production efficiency of the cell piece by concentrating the double-sided coating and the double-sided printing and developing, the quality of the formed copper grid line electrode can be detected only after developing, and if an abnormality occurs on one side, the quality of the entire cell piece will be unqualified, the copper grid line electrode on one side cannot be detected in stages and in time, and the production material is wasted and the defective product rate of the product is high.

[0003] Therefore, it is necessary to provide a double-sided heterojunction solar cell copper grid line preparation device and a cell piece production equipment which can timely remove defective products, reduce material waste and improve the product yield. CONTENT OF THE UTILITY MODEL

[0004] The application aims to solve the above problems, and provides a double-sided heterojunction solar cell copper grid line preparation device and a cell piece production equipment; the grid line preparation device can detect the grid line area in time during the preparation process of the copper grid line of the double-sided heterojunction solar cell piece, avoid the generation probability of defective products, reduce material waste and improve the product yield.

[0005] In order to solve the above technical problems, the technical scheme adopted by the application is as follows:

[0006] In a first aspect, the application provides a device for preparing copper grid lines of a bifacial heterojunction solar cell, which comprises a first surface grid line preparation unit and a second surface grid line preparation unit connected in sequence, the first surface grid line preparation unit and the second surface grid line preparation unit being used for sequentially preparing copper grid lines on two surfaces of a brass sheet, and each of the first surface grid line preparation unit and the second surface grid line preparation unit comprises a developing machine provided with a developing detection mechanism; the developing detection mechanism comprises a rotary driving member, and a visual detection element connected to an output end of the rotary driving member and driven by the rotary driving member, and the visual detection element is used for detecting a copper grid line area formed on the brass sheet.

[0007] Optionally, the developing detection mechanism further comprises a developing liquid gun and a cleaning gun provided at the output end of the rotary driving member, and the developing liquid gun, the visual detection element and the cleaning gun are arranged in a circumferential distribution along the rotary driving member; the developing liquid gun is used for conveying developing liquid, and the cleaning gun is used for removing photosensitive glue and drying the formed grid lines.

[0008] Optionally, the developing liquid gun is connected to the output end of the rotary driving member through a first telescopic driving member; and / or, the visual detection element is connected to the output end of the rotary driving member through a second telescopic driving member; and / or, the cleaning gun is connected to the output end of the rotary driving member through a third telescopic driving member.

[0009] Optionally, the developing liquid gun comprises a first housing, a first conveying pipeline accommodated in the first housing, a first heating wire wound around the first conveying pipeline, and a first temperature control sensor connected to the first heating wire.

[0010] Optionally, the cleaning gun comprises a second housing, a second conveying pipeline accommodated in the second housing, a second heating wire wound around the second conveying pipeline, a second temperature control sensor connected to the second heating wire, and an air inlet pipe and a liquid inlet pipe connected to the second conveying pipeline, and the air inlet pipe and the liquid inlet pipe are respectively provided with a first control valve and a second control valve, the first control valve is used for controlling the flow or cutoff of air in the second conveying pipeline, and the second control valve is used for controlling the flow or cutoff of cleaning liquid in the second conveying pipeline.

[0011] Optionally, the developing machine further comprises a first material taking mechanism, an operation table and a backlight plate, the first material taking mechanism and the developing detection mechanism are respectively arranged on two sides of the operation table, the operation table is arranged on an upper portion of the backlight plate, and the backlight plate cooperates with the visual detection element; the first material taking mechanism comprises a first mechanical hand and a first suction disc arranged at an output end of the first mechanical hand.

[0012] Optionally, the developing machine further comprises an exposure mechanism, which is arranged at a higher level of the developing detection mechanism; the exposure mechanism comprises a third housing, a second material taking mechanism and an exposure lamp accommodated in the third housing, the second material taking mechanism is arranged at an upper portion of the exposure lamp; the second material taking mechanism comprises a second robot and a second suction disc arranged at an output end of the second robot, when the second suction disc sucks the brass sheet, a surface to be exposed of the brass sheet faces the exposure lamp.

[0013] Optionally, the first and second surface grid line preparation units respectively comprise first and second developing machines, and the first and second developing machines are respectively provided with the developing detection mechanism; the first surface grid line preparation unit further comprises a first coating machine arranged at a higher level of the first developing machine, and the second surface grid line preparation unit further comprises a second coating machine arranged at a higher level of the second developing machine, and the second coating machine is arranged at a lower level of the first developing machine.

[0014] Optionally, a surface turning mechanism is arranged between the first developing machine and the second coating machine, and the surface turning mechanism is used for turning the brass sheet processed by the first surface grid line preparation unit to display a second surface of the brass sheet, so that the second surface of the brass sheet faces upwardly to be input into the second coating machine, facilitating the second coating machine to coat the second surface and the subsequent exposure by the second developing machine.

[0015] In a second aspect, the application provides a battery piece production equipment, which comprises the double-sided heterojunction solar cell copper grid line preparation device.

[0016] The application has at least the following beneficial effects:

[0017] The double-sided heterojunction solar cell copper grid line preparation device comprises the first and second surface grid line preparation units, and the first and second surface grid line preparation units both comprise developing machines provided with developing detection mechanisms, the first and second surface grid line preparation units are used to manufacture copper grid lines on two surfaces of the brass sheet in a staged manner, the developing detection mechanism detects the grid lines in time after the first surface grid line preparation unit manufactures the grid lines on the brass sheet, so as to prevent unqualified products from flowing into the second surface grid line preparation unit, avoid waste of production materials and improve the yield of battery piece production. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic view of the double-sided heterojunction solar cell copper grid line preparation device of the application.

[0019] Figure 2 FIG. 4 is a structural schematic view of the exposure machine.

[0020] Figure 3 It is a structure schematic view of the developing solution gun.

[0021] Figure 4 It is a structure schematic view of the cleaning gun.

[0022] Figure 5 It is a structure schematic view of the exposure mechanism.

[0023] Wherein, 100-first surface gate line preparation unit, 101-first developing machine, 102-first coating machine, 200-second surface gate line preparation unit, 201-second developing machine, 202-second coating machine, 300-flip mechanism, 301-second rotary driving part, 302-rotary arm; 11-developing detection mechanism, 111-rotary driving part, 112-vision detection element, 113-developing solution gun, 1131-first shell, 1132-first conveying pipeline, 1133-first heating wire, 114-cleaning gun, 1141-second shell, 1142-second conveying pipeline, 1143-second heating wire, 1144-air inlet pipe, 1145-liquid inlet pipe, 1146-first control valve, 1147-second control valve, 115-first telescopic driving part, 116-second telescopic driving part, 117-third telescopic driving part, 12-first material taking mechanism, 121-first mechanical hand, 122-first suction disc, 13-operation table, 14-backlight plate, 15-exposure mechanism, 151-third shell, 152-second material taking mechanism, 1521-second mechanical hand, 1522-second suction disc, 153-exposure lamp. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.

[0025] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or a middle element can be present at the same time.

[0026] In the present application, the description such as "first", "second" and the like is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features.

[0027] In the description of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0028] Embodiments:

[0029] In a first aspect, the present application provides a device for preparing copper grid lines of a bifacial heterojunction solar cell, as shown in Figure 1 and Figure 2 The device comprises a first surface grid line preparation unit 100 and a second surface grid line preparation unit 200 connected in sequence, the first surface grid line preparation unit 100 and the second surface grid line preparation unit 200 are used to sequentially form copper grid lines on both surfaces of a brass sheet, and the first surface grid line preparation unit 100 and the second surface grid line preparation unit 200 each comprise a developing machine provided with a developing detection mechanism 11; the developing detection mechanism 11 comprises a rotary drive member 111, and a visual detection element 112 connected to the output end of the rotary drive member 111 and driven by the rotary drive member 111, and the visual detection element 112 is used to detect the copper grid line area formed on the brass sheet.

[0030] In use, the second surface grid line preparation unit 200 is arranged at the discharging end of the first surface grid line preparation unit 100, the first surface grid line preparation unit 100 is used to make copper grid lines on the first surface of the brass sheet, and the second surface grid line preparation unit 200 is used to make copper grid lines on the second surface of the brass sheet; the visual detection element 112 arranged on the first surface grid line preparation unit 100 can detect the width, position, morphology and other characteristics of the grid line area after the first surface grid line preparation unit 100 makes the copper grid lines on the first surface of the brass sheet, and only the qualified products can flow to the second surface grid line preparation unit 200, and then the second surface grid line preparation unit 200 makes copper grid lines on the second surface of the brass sheet, and then the visual detection element 112 arranged on the second surface grid line preparation unit 200 detects the grid lines formed on the second surface. The double-sided heterojunction solar cell copper grid line preparation device provided in the application comprises the first surface grid line preparation unit 100 and the second surface grid line preparation unit 200, and the first surface grid line preparation unit 100 and the second surface grid line preparation unit 200 both comprise a developing machine 1 provided with a developing detection mechanism 11, the first surface grid line preparation unit 100 and the second surface grid line preparation unit 200 are used to make copper grid lines on two surfaces of the brass sheet in a staged manner, the developing detection mechanism 11 detects the grid lines in time after the first surface grid line preparation unit 100 makes the grid lines on the brass sheet, so as to prevent unqualified products from flowing to the second surface grid line preparation unit 200, avoid the waste of production materials, and improve the yield of the battery sheet production. It should be noted that the first surface and the second surface of the brass sheet are two opposite planes of the brass sheet.

[0031] Further, referring to Figure 2 As shown in the figure, the developing detection mechanism 11 further comprises a developing liquid gun 113 and a cleaning gun 114 arranged at the output end of the rotary driving member 111, the developing liquid gun 113, the visual detection element 112 and the cleaning gun 114 are arranged along the circumference of the rotary driving member 111; the developing liquid gun 113 is used to transport developing liquid, and the cleaning gun 114 is used to remove the photosensitive adhesive and dry the formed grid lines. Integrating the developing liquid gun 113, the visual detection element 112 and the cleaning gun 114 at the output end of the same rotary driving member 111 improves the overall integration of the device, simplifies the structure of the equipment, and saves the production cost. The rotary driving member 111 is a DD motor.

[0032] In use, according to actual operation needs, the developing solution gun 113, the cleaning gun 114 and the visual detection element 112 are rotated to the operation positions for operation. For example, the developing solution gun 113, the cleaning gun 114 and the visual detection element 112 are respectively rotated to the corresponding operation positions by the driving of the rotation driving member 111, and the operations of conveying developing solution, removing photosensitive emulsion and drying, and detecting grid lines are sequentially completed.

[0033] The developing solution gun 113 is connected to the output end of the rotation driving member 111 through a first telescopic driving member 115; and / or, the visual detection element 112 is connected to the output end of the rotation driving member 111 through a second telescopic driving member 116; and / or, the cleaning gun 114 is connected to the output end of the rotation driving member 111 through a third telescopic driving member 117. That is, as an option, the developing solution gun 113, the visual detection element 112 and the cleaning gun 114 can be connected to the output end of the rotation driving member 111 through the corresponding telescopic driving members according to actual needs, so as to improve the adjustability of the developing detection mechanism 11. For example Figure 3 As shown, the developing solution gun 113, the visual detection element 112 and the cleaning gun 114 are respectively connected to the output end of the rotation driving member 111 through the first telescopic driving member 115, the second telescopic driving member 116 and the third telescopic driving member 117. Specifically, the first telescopic driving member 115, the second telescopic driving member 116 and the third telescopic driving member 117 are telescopic cylinders; the first telescopic driving member 115 is arranged at the output end of the rotation driving member 111, and the developing solution gun 113 is arranged at the telescopic end of the first telescopic driving member 115; the second telescopic driving member 116 is arranged at the output end of the rotation driving member 111, and the visual detection element 112 is arranged at the telescopic end of the second telescopic driving member 116; the third telescopic driving member 117 is arranged at the output end of the rotation driving member 111, and the cleaning gun 114 is arranged at the telescopic end of the third telescopic driving member 117.

[0034] Referring to Figure 3 As shown, the developing solution gun 113 comprises a first housing 1131, a first conveying pipeline 1132 accommodated in the first housing 1131, a first heating wire 1133 arranged around the first conveying pipeline 1132 and a first temperature control sensor connected to the first heating wire 1133. The arrangement of the first heating wire 1133 and the first temperature control sensor enables the developing solution gun 113 to regulate the temperature of the developing solution when conveying the developing solution, which facilitates the adjustment of the developing solution concentration and the control of the exposure rate.

[0035] Referring to Figure 4As shown, the cleaning gun 114 comprises a second housing 1141, a second conveying pipe 1142 accommodated in the second housing 1141, a second heating wire 1143 wound around the second conveying pipe 1142, a second temperature control sensor connected to the second heating wire 1143, and an air inlet pipe 1144 and a liquid inlet pipe 1145 connected to the second conveying pipe 1142, wherein the air inlet pipe 1144 and the liquid inlet pipe 1145 are respectively provided with a first control valve 1146 and a second control valve 1147, the first control valve 1146 is used to control the flow or cutoff of air in the second conveying pipe 1142, and the second control valve 1147 is used to control the flow or cutoff of cleaning liquid in the second conveying pipe 1142, and the first control valve 1146 and the second control valve 1147 are respectively controlled, so that the cleaning gun 114 can output hot cleaning liquid or hot air. In use, the second conveying pipe 1142 is heated by the second heating wire, so that the second conveying pipe 1142 heats the transmitted medium, and under the control of the control valve, the second conveying pipe 1142 selectively outputs hot cleaning liquid or hot air, so that the cleaning gun 114 can transmit hot cleaning liquid to clean the photosensitive adhesive or blow out hot air to dry the surface of the material. The cleaning gun 114 has the functions of cleaning and drying, and can directly perform drying operation after cleaning the photosensitive adhesive.

[0036] Referring to Figure 2 As shown, the developing machine 1 further comprises a first material taking mechanism 12, an operation table 13 and a backlight plate 14, the first material taking mechanism 12 and the developing detection mechanism 11 are respectively arranged on two sides of the operation table 13, the operation table 13 is arranged on the upper part of the backlight plate 14, the backlight plate 14 cooperates with the visual detection element 112, when it is needed to detect the grid line area, the backlight plate 14 is opened, and the visual detection element 112 is started to take a photo of the grid line area; the first material taking mechanism 12 comprises a first mechanical hand 121 and a first suction disc 122 arranged on the output end of the first mechanical hand 121. The visual detection unit can be an AOI camera or a CCD industrial camera. The first mechanical hand and the second mechanical hand 1521 used in the application can be an industrial four-axis robot. In use, the first suction disc 122 completes the operation of taking and placing the material to and from the operation table 13 under the driving of the first mechanical hand 121.

[0037] Referring to Figure 5As shown, the developing machine 1 further comprises an exposure mechanism 15 arranged at a higher level of the developing detection mechanism 11; the exposure mechanism 15 comprises a third housing 151, a second material taking mechanism 152 and an exposure lamp 153 accommodated in the third housing 151, and the second material taking mechanism 152 is arranged at an upper portion of the exposure lamp 153; the second material taking mechanism 152 comprises a second mechanical arm 1521 and a second suction disc 1522 arranged at an output end of the second mechanical arm 1521, and when the second suction disc 1522 sucks the brass sheet, the side of the brass sheet to be exposed faces the exposure lamp 153. It should be noted that the upper in the present application refers to the direction away from the mounting plane of the copper grid line preparation device. The second material taking mechanism 152 is used to suck the brass sheet in the exposure mechanism 15, and the second material taking mechanism 152 is used to directly transfer the battery sheet to the area corresponding to the exposure lamp 153 for exposure, thereby avoiding surface scratches caused by the transmission of the unexposed brass sheet by the transmission belt and the like.

[0038] Referring to Figure 2 As shown, the first surface grid line preparation unit 100 and the second surface grid line preparation unit 200 respectively comprise a first developing machine 101 and a second developing machine 201, and the first developing machine 101 and the second developing machine 201 are respectively provided with the developing detection mechanism 11; the first surface grid line preparation unit 100 further comprises a first coating machine 102 arranged at a higher level of the first developing machine 101, the second surface grid line preparation unit 200 further comprises a second coating machine 202 arranged at a higher level of the second developing machine 201, and the second coating machine 202 is arranged at a lower level of the first developing machine 101. That is, the first coating machine 102, the first developing machine 101, the second coating machine 202 and the second developing machine 201 are sequentially connected and arranged.

[0039] In some embodiments, a surface turning mechanism 300 is arranged between the first developing machine 101 and the second coating machine 202, and the surface turning mechanism 300 is used to turn the brass sheet processed by the first surface grid line preparation unit 100 to display the second surface of the brass sheet, so that the second surface of the brass sheet is input into the second coating machine 202 with the second surface upward, facilitating the second coating machine 202 to coat the second surface and the subsequent exposure by the second developing machine 201. The surface turning mechanism 300 comprises a second rotary driving member 301 and a rotary arm 302 driven by the second rotary driving member 301, and the rotary arm 302 is arranged in a radial manner with the output end of the second rotary driving member 301 as the center; one end of the rotary arm 302 away from the output end of the second rotary driving member 301 is used to receive the brass sheet.

[0040] The feeding end of the first coating machine 102 is provided with a feeding flower basket, and the discharging end of the second developing machine 201 is provided with a discharging flower basket. The feeding flower basket and the discharging flower basket are transported by a transfer trolley. The transfer trolley is manually operated. As an option, in some embodiments, a first transfer flower basket is arranged between the first coating machine 102 and the first developing machine 101, and a second transfer flower basket is arranged between the second coating machine 202 and the second developing machine 201. The first transfer flower basket and the second transfer flower basket are manually transported. The materials are stored and transported in the transfer flower baskets, reducing the arrangement of intermediate transmission devices and the cost of the device. In other embodiments, a first conveying belt is arranged between the first coating machine 102 and the first developing machine 101, and a second conveying belt is arranged between the second coating machine 202 and the second developing machine 201. The arrangement of the first conveying belt and the second conveying belt enables the brass sheet processed by the coating machine to be directly transmitted to the developing machine 1 for printing, exposure and development, thereby reducing the waiting time and saving manpower.

[0041] In use, the working principle of the double-sided heterojunction solar cell copper grid preparation device of the present application is as follows: after the first coating machine 102 receives the brass sheet, the first side of the brass sheet is coated, and then the exposure mechanism 15 of the first exposure machine is used to expose and print patterns on the coated first side. The rotary drive member 111 in the developing and detecting mechanism 11 drives the developing liquid gun 113 to rotate into position, and the developing liquid is used to remove the cured photosensitive glue. The cleaning gun 114 is driven to position to clean and dry the first side of the brass sheet. The visual detection element 112 is driven to rotate into position to detect the grid area formed on the first side. After detection, the turnover mechanism 300 turns over the brass sheet so that the second side of the brass sheet is fed upward to the second coating machine 202. The second coating machine 202 coats the second side of the brass sheet, and then the exposure mechanism 15 of the second exposure machine is used to expose and print on the coated first side. The rotary drive member 111 in the developing and detecting mechanism 11 drives the developing liquid gun 113 to rotate into position, and the developing liquid is used to remove the cured photosensitive glue. The cleaning gun 114 is driven to position to clean and dry the second side of the brass sheet. The visual detection element 112 is driven to rotate into position to detect the grid area formed on the second side. The double-sided heterojunction solar cell copper grid preparation device of the present application adopts the process flow of single-sided coating, single-sided printing and single-sided developing, and then coating, printing and developing the other side. This can avoid the situation that a single piece is scrapped after being processed on both sides, wasting photosensitive glue. When a single-sided defect occurs on site, the film can be removed and reworked or printed as a defective product as needed. At the same time, the number of devices is reduced, and the floor area occupied by the devices is reduced.

[0042] In a second aspect, the application provides a battery piece production device, which comprises the double-sided heterojunction solar cell copper grid line preparation device as described above. The double-sided heterojunction solar cell copper grid line preparation device is configured with the first surface grid line preparation unit 100 and the second surface grid line preparation unit 200 to perform the operations of coating photosensitive glue, exposure printing, developing and grid line detection on the two surfaces of the brass sheet respectively. After the first surface grid line preparation unit 100 forms the grid line on the first surface of the brass sheet, the visual detection element 112 timely detects the grid line formed on the first surface, which avoids the unqualified products from flowing to the second surface grid line preparation unit 200 in the next stage, avoids the waste of raw materials, improves the overall production efficiency of the battery piece production device, and further improves the yield of the battery piece.

[0043] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0044] The above embodiments only express the preferred 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 patent scope of the application. It should be pointed out that for those 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 patent protection scope of the present application should be subject to the appended claims.

Claims

1. A device for preparing a copper grid line of a bifacial heterojunction solar cell, characterized in that: The device comprises a first and a second surface grid line preparation unit connected in sequence, which are used to form copper grid lines on both surfaces of a brass sheet, and each of the units comprises a developing machine provided with a developing detection mechanism; the developing detection mechanism comprises a rotary drive member, and a visual detection element connected to the output end of the rotary drive member and driven by the rotary drive member, which is used to detect the copper grid line area formed on the brass sheet.

2. The apparatus for manufacturing a copper busbar of a bifacial heterojunction solar cell according to claim 1, wherein: The developing detection mechanism further comprises a developing liquid gun and a cleaning gun provided on the output end of the rotary drive member, which are arranged along the circumference of the rotary drive member; the developing liquid gun is used to deliver developing liquid, and the cleaning gun is used to remove photosensitive glue and dry the formed grid lines.

3. The apparatus for manufacturing a copper busbar of a bifacial heterojunction solar cell according to claim 2, wherein: The developing liquid gun is connected to the output end of the rotary drive member through a first telescopic drive member; and / or, the visual detection element is connected to the output end of the rotary drive member through a second telescopic drive member; and / or, the cleaning gun is connected to the output end of the rotary drive member through a third telescopic drive member.

4. The apparatus according to claim 2, wherein: The developing liquid gun comprises a first housing, a first delivery pipeline accommodated in the first housing, a first heating wire wound around the first delivery pipeline, and a first temperature control sensor connected to the first heating wire.

5. The apparatus according to claim 3, wherein: The cleaning gun comprises a second housing, a second delivery pipeline accommodated in the second housing, a second heating wire wound around the second delivery pipeline, a second temperature control sensor connected to the second heating wire, and an air inlet pipe and a liquid inlet pipe connected to the second delivery pipeline, which are respectively provided with a first control valve and a second control valve, the first control valve is used to control the flow or cutoff of air in the second delivery pipeline, and the second control valve is used to control the flow or cutoff of cleaning liquid in the second delivery pipeline.

6. The apparatus according to claim 1, wherein: The developing machine further comprises a first material taking mechanism, an operation table, and a backlight plate, the first material taking mechanism and the developing detection mechanism are respectively arranged on both sides of the operation table, the operation table is arranged on the upper part of the backlight plate, and the backlight plate cooperates with the visual detection element; the first material taking mechanism comprises a first mechanical hand and a first suction disc arranged on the output end of the first mechanical hand.

7. The apparatus according to claim 1, wherein: The developing machine further comprises an exposure mechanism arranged on the upper stage of the developing detection mechanism; the exposure mechanism comprises a third housing, a second material taking mechanism, and an exposure lamp accommodated in the third housing, the second material taking mechanism is arranged on the upper part of the exposure lamp; the second material taking mechanism comprises a second mechanical hand and a second suction disc arranged on the output end of the second mechanical hand, when the second suction disc sucks the brass sheet, the surface of the brass sheet to be exposed faces the exposure lamp.

8. The apparatus according to claim 1, wherein: The first and second face grid line preparation units each comprise a first and second developing machine respectively, and the first and second developing machines are respectively provided with the developing detection mechanism; the first face grid line preparation unit further comprises a first coating machine arranged at a previous stage of the first developing machine, and the second face grid line preparation unit further comprises a second coating machine arranged at a previous stage of the second developing machine, and the second coating machine is arranged at a next stage of the first developing machine.

9. The apparatus according to claim 8, wherein: A turning mechanism is arranged between the first developing machine and the second coating machine, and the turning mechanism is used for turning the brass sheet after being processed by the first face grid line preparation unit, so as to display the second face of the brass sheet, so that the second face of the brass sheet is input into the second coating machine in an upward direction, the second coating machine is facilitated to coat the second face, and the second developing machine is facilitated to expose subsequently.

10. A battery cell manufacturing equipment, characterized in that: A device for preparing copper grid lines of a double-sided heterojunction solar cell, comprising the device according to any one of claims 1-9.

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