Battery cell stringing method and device

Abstract

The present invention provides a method and device for stringing battery cells, wherein the method for stringing battery cells comprises the following steps: setting a first adhesive tape on the reverse side of the battery cell along a direction intersecting with a secondary grid line; turning over the battery cell; setting a second adhesive tape on the front side of the battery cell along a direction intersecting with the secondary grid line; cutting the welding tape into welding tape segments; placing the welding tape segments on the first adhesive tape of the previous battery cell and on the second adhesive tape of the next battery cell to form a battery string; curing the battery string so that the secondary grid line on the battery cell contacts and is fixedly connected with the welding tape segments; the stringing method proposed by the present invention is simpler. Compared with the existing main grid-free string welding scheme, the present invention does not require flux, and alloying does not need to be formed between the welding tape and each secondary grid line of the battery cell. At the same time, the battery string can be subjected to EL detection after being cured, and will not cause the entire battery panel after lamination to be scrapped, and the difficulty of rework is small.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery production, and more specifically, relates to a battery cell stringing method and device. Background Art

[0002] The existing busbar-free string welding scheme is to first apply glue dots to the specified position on the surface of the battery cell (the middle position between two adjacent secondary grid lines), then string the soldering tape with the battery cell and make the soldering tape initially bonded to the battery cell through the glue dots to form a battery string, and then layout the battery string and weld the busbars. Finally, when the components are laminated, the tin on the low-temperature soldering tape is melted by lamination heating to form an alloyed connection between the soldering tape and the secondary grid lines of the battery cell.

[0003] However, the prior art has the following deficiencies: 1. During lamination, the melted EVA film enters between the welding ribbon and the secondary grid line, affecting the alloy connection between the two. It is necessary to lay a functional film on the outside of the welding ribbon to isolate the EVA, which increases the cost of the component; 2. After lamination, it cannot be guaranteed that each welding ribbon in each battery string in the component can be alloyed with all the secondary grid lines of the battery cell. If there is a welding ribbon that is not completely alloyed with the secondary grid line of the battery cell, since the component has been laminated at this time, it is very difficult to repair it, and it is very likely that the entire component will need to be scrapped; 3. The process is complicated, and it is necessary to change the laminating machine or the lamination process, etc.

[0004] Therefore, how to provide a simpler way to string together solar cells is an urgent problem to be solved in the industry. Summary of the invention

[0005] The object of the present invention is to provide a method and device for stringing together solar cells, so as to solve the problems of complex equipment and great difficulty in repair in the existing method of stringing together solar cells.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention first provides a method for stringing solar cells, comprising:

[0008] A first adhesive tape is arranged on the reverse side of the battery cell in a direction intersecting with the secondary grid line;

[0009] Turning over the battery cell;

[0010] Disposing a second adhesive tape on the front side of the battery cell in a direction intersecting with the secondary grid line;

[0011] Cut the welding ribbon into welding ribbon segments;

[0012] Placing the welding ribbon segment on the first adhesive tape of the previous battery sheet and on the second adhesive tape of the next battery sheet to form a battery string;

[0013] The battery string is cured so that the secondary grid lines on the battery cells are in contact with and fixedly connected to the welding strip segments.

[0014] Furthermore, the specific operation of providing the first adhesive tape on the reverse side of the cell along the direction intersecting the secondary grid line is:

[0015] The battery cell is placed on a first printing table of a first printing mechanism by a conveying mechanism, and a first adhesive tape is printed on the reverse side of the battery cell in a direction perpendicular to the secondary grid line by the first printing mechanism.

[0016] Furthermore, before placing the battery cell on the first printing table of the first printing mechanism by the transport mechanism, the method further includes:

[0017] The battery cell is transferred to the first visual positioning platform of the first visual inspection mechanism by a loading mechanism, and the back side of the battery cell is photographed and positioned by the first visual inspection mechanism.

[0018] Furthermore, the specific operation of providing the second tape on the front side of the battery cell along the direction intersecting with the secondary grid line is:

[0019] The battery cell is placed on the second printing table of the second printing mechanism by the conveying mechanism, and the second printing mechanism prints the second adhesive tape on the front side of the battery cell in a direction perpendicular to the secondary grid line.

[0020] Furthermore, before placing the battery sheet on the second printing table of the second printing mechanism by the transport mechanism, the method further includes:

[0021] The battery cell is placed on a second visual positioning platform of a second visual inspection mechanism by a conveying mechanism, and the front side of the battery cell is photographed and positioned by the second visual inspection mechanism.

[0022] Furthermore, the specific operation of placing the welding ribbon segment on the first adhesive tape of the previous battery cell and on the second adhesive tape of the next battery cell to form a battery string is:

[0023] The previous battery cell is placed on the conveyor belt by the conveying mechanism, the welding tape segment is pulled onto the conveyor belt by the pulling hand of the welding tape mechanism so that the front half of the welding tape segment is placed on the first tape of the previous battery cell, and the rear battery cell is placed on the conveyor belt by the conveying mechanism so that the rear half of the welding tape segment is placed on the second tape of the rear battery cell, and this is repeated N times to form a battery string.

[0024] Furthermore, while forming the battery string, the battery cells are heated by the conveyor belt having a heating function, and a pressing plate is placed on the battery cells by a transport mechanism so that the pressing plate applies pressure to the battery cells.

[0025] Furthermore, the specific operation of curing the battery string is:

[0026] The battery string is placed on a curing platform of a curing furnace by a conveying mechanism, and the battery string is heated and pressurized by a heating device and a pressurizing device in the curing furnace.

[0027] Furthermore, the first adhesive tape and the second adhesive tape are made of one of epoxy resin adhesive and organic silicone.

[0028] The present invention also provides a battery cell stringing device, comprising:

[0029] A printing mechanism, having a printing table for placing a battery cell, wherein the printing mechanism sets a first adhesive tape on the reverse side of the battery cell in a direction intersecting with the secondary grid line, or sets a second adhesive tape on the front side of the battery cell in a direction intersecting with the secondary grid line;

[0030] A flipping mechanism, having a flipping station for placing the battery cell, and the flipping mechanism flips the battery cell 180 degrees;

[0031] A transport mechanism, wherein the transport mechanism transports the battery cell;

[0032] A soldering ribbon mechanism, comprising a soldering ribbon roll wound with soldering ribbon, a cutting component for cutting the soldering ribbon unwound from the soldering ribbon roll into soldering ribbon segments, and a pulling hand for pulling the soldering ribbon segments onto a conveyor belt, wherein the soldering ribbon mechanism cooperates with the conveying mechanism to place the soldering ribbon segments on the first adhesive tape of the preceding battery cell and on the second adhesive tape of the succeeding battery cell to form a battery string;

[0033] A curing furnace is provided with a curing platform for placing the battery cell, and the curing furnace performs a curing process on the battery string so that the secondary grid line on the battery cell is in contact with and fixedly connected to the welding belt segment.

[0034] Compared with the prior art, the beneficial effects of the battery cell stringing method and device provided by the present invention are: the battery cell stringing method and device proposed by the present invention are simpler, do not require flux, and do not need to form alloys between the soldering strips and the auxiliary grid lines of the battery cells. At the same time, the battery string can be EL tested after the curing treatment, which will not cause the entire battery panel after lamination to be scrapped, and the difficulty of rework is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 It is a schematic diagram of the process of the battery cell stringing method in the present invention;

[0037] Figure 2 A schematic cross-sectional view of a cell sheet with a welding ribbon segment placed thereon in the present invention

[0038] Figure 3 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0039] Figure 4 This is a schematic diagram of the structure of the glue coating part of the battery cell stringing device in the present invention;

[0040] Figure 5 It is a schematic diagram of the structure of the stringing part of the battery cell stringing device in the present invention;

[0041] Figure 6 Schematic diagram of the formation process of a battery string in the present invention;

[0042] Figure 7 for Figure 6 The enlarged schematic diagram at A in the middle;

[0043] The reference numerals in the figures are:

[0044] 11. Cell; 12. Auxiliary grid line; 13. First adhesive tape; 14. Second adhesive tape; 15. Welding tape segment;

[0045] 21. Feeding mechanism; 22. Turning mechanism; 23. First printing table; 24. Second printing platform; 25. Welding belt mechanism; 26. Conveyor belt; 27. Curing oven; 28. First visual inspection mechanism; 29. ​​Second visual inspection mechanism. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] In order to overcome the shortcomings of the existing battery cell stringing method such as complex equipment and difficulty in repair, the present invention proposes a battery cell stringing method and device, which is applied to the busbar-free string welding technology, can reduce the stringing process steps, make the equipment simpler, and at the same time can detect EL after the stringing is completed, which will not cause the entire battery panel after lamination to be scrapped and has low difficulty in repair.

[0048] Please also read Figure 1 The method for stringing cells proposed in the present invention comprises the following steps:

[0049] A first adhesive tape is arranged on the reverse side of the battery cell in a direction intersecting with the secondary grid line;

[0050] Turn over the battery cell;

[0051] A second adhesive tape is arranged on the front side of the battery cell in a direction intersecting with the secondary grid line;

[0052] Cut the welding ribbon into welding ribbon segments;

[0053] Placing the welding ribbon segment on the first adhesive tape of the preceding cell sheet and on the second adhesive tape of the succeeding cell sheet to form a cell string;

[0054] The battery string is cured so that the secondary grid lines on the battery cells are in contact with the welding strip segments and are fixedly connected.

[0055] The stringing method proposed in the present invention is simpler. Compared with the existing main grid-free string welding scheme, the present invention does not require flux, and there is no need to form alloys between the welding strip and the auxiliary grid lines of the battery cell. At the same time, the battery string can be EL tested after curing (EL testing, i.e. photovoltaic cell module defect detection, is commonly used to detect internal defects, hidden cracks, fragments, cold solder joints, broken grids and abnormal phenomena of single-chip cells with different conversion efficiencies in photovoltaic cell modules), which will not cause the entire battery panel after lamination to be scrapped, and the difficulty of rework is small.

[0056] In a further preferred embodiment of the present invention, the specific operation of disposing the first adhesive tape on the reverse side of the solar cell in a direction intersecting with the secondary grid line is as follows:

[0057] The battery cell is placed on the first printing table of the first printing mechanism by the conveying mechanism, and the first printing mechanism prints the first adhesive tape on the reverse side of the battery cell in a direction perpendicular to the secondary grid line.

[0058] It should be noted that the transport mechanism may be a manipulator or other types of transport equipment. The first printing mechanism prints a plurality of first adhesive tapes at intervals on the back of the cell by printing and coating, and the first adhesive tapes are arranged perpendicular to the secondary grid lines.

[0059] In a further preferred embodiment of the present invention, before placing the battery sheet on the first printing table of the first printing mechanism by the transport mechanism, the process further comprises:

[0060] The battery cell is transferred to the first visual positioning platform of the first visual inspection mechanism by the loading mechanism, and the back side of the battery cell is photographed and positioned by the first visual inspection mechanism.

[0061] It should be noted that the feeding mechanism can be a synchronous belt conveying mechanism or other types of conveying equipment.

[0062] The present invention adopts a method in which the first visual inspection mechanism first photographs and locates the back of the battery cell before printing the first adhesive tape on the back of the battery cell. Subsequently, the conveying mechanism adjusts the angle of the battery cell according to the photographed positioning information and places it on the first printing table of the first printing mechanism, thereby ensuring the accuracy of printing the adhesive tape.

[0063] In a further preferred embodiment of the present invention, the specific operation of disposing the second tape on the front side of the solar cell in a direction intersecting with the secondary grid line is as follows:

[0064] The battery cell is placed on the second printing table of the second printing mechanism by the conveying mechanism, and the second adhesive tape is printed on the front side of the battery cell in a direction perpendicular to the secondary grid line by the second printing mechanism.

[0065] It should be noted that the transport mechanism may be a manipulator or other types of transport equipment. The second printing mechanism prints a plurality of second adhesive tapes at intervals on the front of the battery cell by printing and coating, and the second adhesive tapes are arranged perpendicular to the secondary grid lines.

[0066] In a further preferred embodiment of the present invention, before placing the battery sheet on the second printing table of the second printing mechanism by the transport mechanism, the process further comprises:

[0067] The battery cell is placed on the second visual positioning platform of the second visual inspection mechanism by the conveying mechanism, and the front side of the battery cell is photographed and positioned by the second visual inspection mechanism.

[0068] The present invention adopts a method in which the second visual inspection mechanism first photographs the front side of the battery cell for positioning before printing the second adhesive tape on the front side of the battery cell. Subsequently, the conveying mechanism adjusts the angle of the battery cell according to the photographed positioning information and places it on the second printing table of the second printing mechanism, thereby ensuring the accuracy of printing the adhesive tape.

[0069] In a further preferred embodiment of the present invention, the specific operation of placing the welding ribbon segment on the first adhesive tape of the previous battery sheet and the second adhesive tape of the next battery sheet to form a battery string is:

[0070] The previous battery cell is placed on the conveyor belt by the transport mechanism, and the welding tape segment is pulled onto the conveyor belt by the welding tape pulling hand of the welding tape mechanism so that the front half of the welding tape segment is placed on the first tape of the previous battery cell, and the rear battery cell is placed on the conveyor belt by the transport mechanism so that the rear half of the welding tape segment is placed on the second tape of the rear battery cell, and this is repeated N times to form a battery string.

[0071] It should be understood that the same welding ribbon segment is placed on the front and back surfaces of two adjacent battery cells, and a number of battery cells are connected in series through the welding ribbon segment to form a battery string.

[0072] In a further preferred embodiment of the present invention, while forming the battery string, the battery cells are heated by a conveyor belt having a heating function, and a pressing plate is placed on the battery cells by a transport mechanism so that the pressing plate applies pressure to the battery cells.

[0073] It should be noted that heating elements such as a heating base plate or a heating wire are installed on the conveyor belt. When the conveyor belt starts to transport the battery cell with the solder ribbon segment, the heating element on the conveyor belt will be energized and heated. At the same time, the pressing plate will press the battery cell with the solder ribbon segment. This can increase the adhesion between the solder ribbon segment and the glue, complete the pre-curing treatment of the battery string, and facilitate the subsequent transportation of the battery string.

[0074] In actual applications, when the battery cell is heated by a conveyor belt with a heating function, the temperature is 80-130°C, and when the pressure plate applies pressure to the battery cell, the pressure is 10-100N.

[0075] In a further preferred embodiment of the present invention, the specific operation of curing the battery string is:

[0076] The battery string is placed on the curing platform of the curing furnace by the transport mechanism, and the heating device and the pressurizing device in the curing furnace heat and pressurize the battery string. In this way, the battery string is kept in the state of heating and pressurization for a certain period of time (for example, 5-20 seconds), and the glue between the bottom of the welding belt segment and the auxiliary grid line will be pushed away due to the pressure, so that the welding belt segment and the auxiliary grid line are in physical contact, forming a conductive circuit; at the same time, the first and second adhesive tapes on the battery cell will be fixed due to the heating effect, and the welding belt segment and the auxiliary grid line will be permanently connected after the glue is cured.

[0077] It should be noted that the curing platform and the heating device can be integrated into one component, for example, it can be a conveyor belt with a heating function, or it can be a heating plate. The pressurizing device can be a lifting plate. The pressurizing device is provided with a buffer layer on the plane directly in contact with the battery string, and the material of the buffer layer can be but is not limited to rubber.

[0078] In practical applications, when the battery string is heated by the heating device, the temperature may be 100-220°C or 150-260°C, and when the battery string is pressurized by the pressurizing device, the pressure may be 100-200N.

[0079] In a further preferred embodiment of the present invention, the first adhesive tape and the second adhesive tape are made of one of epoxy resin adhesive and organic silicone.

[0080] Please also read Figures 2 to 7 The battery cell stringing device provided by the present invention at least comprises:

[0081] A printing mechanism, having a printing table for placing the battery cell 11, the printing mechanism sets a first adhesive tape 13 on the reverse side of the battery cell 11 in a direction intersecting the secondary grid line 12, or sets a second adhesive tape 14 on the front side of the battery cell 11 in a direction intersecting the secondary grid line 12;

[0082] The flipping mechanism 22 has a flipping station for placing the battery cell 11, and the flipping mechanism 22 flips the battery cell 11 180 degrees;

[0083] A transport mechanism, which transports the battery cell 11;

[0084] The soldering ribbon mechanism 25 comprises a soldering ribbon roll wound with soldering ribbon, a cutting component for cutting the soldering ribbon unwound from the soldering ribbon roll into soldering ribbon segments 15, and a pulling hand for pulling the soldering ribbon segments 15 onto the conveyor belt 26. The soldering ribbon mechanism 25 cooperates with the conveying mechanism to place the soldering ribbon segments 15 on the first adhesive tape 13 of the previous battery cell 11 and on the second adhesive tape 14 of the next battery cell 11 to form a battery string;

[0085] The curing oven 27 has a curing platform for placing the battery cells 11 . The curing oven 27 performs a curing process on the battery string so that the secondary grid lines 12 on the battery cells 11 are in contact with and fixedly connected to the welding strip segments 15 .

[0086] The cell stringing device proposed in the present invention has a simpler structure. Compared with the existing main grid-free string welding scheme, the present invention does not need to add a flux coating mechanism, and there is no need to form an alloy between the welding strip and the auxiliary grid lines 12 of the cell 11. At the same time, the cell string can be EL tested after the curing treatment, which will not cause the entire cell panel after lamination to be scrapped, and the difficulty of rework is small.

[0087] In a further preferred embodiment of the present invention, the number of printing mechanisms is set to two, and the two printing mechanisms are a first printing mechanism and a second printing mechanism. The first printing mechanism has a first printing platform 23, and the second printing mechanism has a second printing platform 24. The first printing mechanism prints a plurality of first adhesive tapes 13 distributed at intervals on the back of the battery cell 11 by printing and coating, and the second printing mechanism prints a plurality of second adhesive tapes 14 distributed at intervals on the front of the battery cell 11 by printing and coating.

[0088] In a further preferred embodiment of the present invention, the battery cell stringing device further includes a first visual inspection mechanism 28 and a second visual inspection mechanism 29. The first visual inspection mechanism 28 has a first visual positioning platform, and the second visual inspection mechanism 29 has a second visual positioning platform. The first visual inspection mechanism 28 takes a photo to position the back side of the battery cell 11, and the second visual inspection mechanism 29 takes a photo to position the front side of the battery cell 11.

[0089] In a further preferred embodiment of the present invention, a heating device and a pressurizing device are provided in the curing furnace 27, and the curing platform and the heating device can be integrated into one component, for example, it can be a conveyor belt with a heating function, or it can be a heating plate. The pressurizing device can be a lifting and lowering pressing plate.

[0090] For better understanding, the battery cell stringing process of the present invention is fully described below.

[0091] Step 1: The battery cell 11 is transferred to the first visual positioning platform of the first visual inspection mechanism 28 through the feeding mechanism 21, and the first visual inspection mechanism 28 takes a photo to position the back side of the battery cell 11; after the photo positioning is completed, the battery cell 11 is transported to the first printing platform 23 of the first printing mechanism through the transport mechanism, and the first printing mechanism prints the first tape 13 on the back side of the battery cell 11.

[0092] Step 2: After the first adhesive tape 13 on the back of the battery cell 11 is printed, the battery cell 11 is transported to the flip mechanism 22 by the transport mechanism, and the flip mechanism 22 flips the battery cell 11 180 degrees; the battery cell 11 is then transported to the second visual positioning platform of the second visual inspection mechanism 29 by the transport mechanism, and the second visual inspection mechanism 29 takes a photo to position the front of the battery cell 11; after the photo positioning is completed, the battery cell 11 is transported to the second printing platform 24 of the second printing mechanism by the transport mechanism, and the second printing mechanism prints the second adhesive tape 14 on the front of the battery cell 11. The second printing platform 24 is provided with a glue avoidance groove.

[0093] Step 3: While printing the first adhesive tape 13 and the second adhesive tape 14, the cutting component in the solder tape mechanism 25 cuts the solder tape unwound from the solder tape roll into solder tape segments 15 of target length, and pulls the solder tape segments 15 onto the conveyor belt 26 through the pull handle, and cooperates with the conveying mechanism to transport the battery cell 11 with double-sided adhesive printed on it; for example, each time 24 solder tape segments 15 are pulled and placed on the 24 first adhesive tapes 13 of the battery cell 11, it is necessary to ensure that the adhesive is aligned with the solder tape segments 15. The battery cell 11 and the welding tape segment 15 are fixed on the conveyor belt 26 by vacuum adsorption (or pressing by a pressure plate), so that they move a certain distance with the conveyor belt 26; then the above-mentioned action of placing the welding tape and the battery cell 11 is repeated N times (N depends on the length of the battery string), and the production of the battery string is completed. While laying the string, the conveyor belt 26 with a heating function will heat the battery cell 11 with the welding tape segment 15 placed thereon, and exert a certain pressure on the battery cell 11 with the welding tape segment 15 placed thereon with the help of the pressure plate, which can increase the adhesion between the glues and facilitate the subsequent transportation of the battery string.

[0094] Step 4: After the battery string is made, the battery string is transported to the curing platform of the curing furnace 27 by the transport mechanism, and then the pressure device in the curing furnace 27 is lowered to press on the battery string; while applying pressure, the heating device in the curing furnace 27 is also turned on, so that the battery string is pressurized and heated at the same time; the battery string is kept in the pressurized and heated state for a certain period of time, so that the glue on the battery cell 11 will solidify. When applying pressure to the battery string, the glue between the bottom of the welding ribbon segment 15 and the auxiliary grid line 12 will be pushed away, so that the welding ribbon segment 15 and the auxiliary grid line 12 are in physical contact, forming a conductive circuit. After the glue is solidified, the welding ribbon segment 15 and the auxiliary grid line 12 are permanently connected together.

[0095] Step 5: After curing is completed, the fully cured battery string is transferred to the next station for EL testing through a transport mechanism or an assembly line. At the same time, the curing furnace 27 is curing the next battery string. In this way, the battery cell 11 is completed.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for stringing cells, characterized in that: include: A first adhesive tape is arranged on the reverse side of the battery cell in a direction intersecting with the secondary grid line; Turning over the battery cell; Disposing a second adhesive tape on the front side of the battery cell in a direction intersecting with the secondary grid line; Cut the welding ribbon into welding ribbon segments; Placing the welding ribbon segment on the first adhesive tape of the previous battery sheet and on the second adhesive tape of the next battery sheet to form a battery string; The battery string is cured so that the secondary grid lines on the battery cells are in contact with and fixedly connected to the welding strip segments.

2. The method for stringing cells according to claim 1, characterized in that: The specific operation of placing the first adhesive tape on the reverse side of the solar cell in a direction intersecting with the secondary grid line is as follows: The battery cell is placed on a first printing table of a first printing mechanism by a conveying mechanism, and a first adhesive tape is printed on the reverse side of the battery cell in a direction perpendicular to the secondary grid line by the first printing mechanism.

3. The method for stringing cells according to claim 2, wherein: Before placing the battery sheet on the first printing table of the first printing mechanism by the transport mechanism, the method further includes: The battery cell is transferred to the first visual positioning platform of the first visual inspection mechanism by a loading mechanism, and the back side of the battery cell is photographed and positioned by the first visual inspection mechanism.

4. The method for stringing cells according to claim 1, characterized in that: The specific operation of setting the second tape on the front side of the solar cell in a direction intersecting with the secondary grid line is: The battery cell is placed on the second printing table of the second printing mechanism by the conveying mechanism, and the second printing mechanism prints the second adhesive tape on the front side of the battery cell in a direction perpendicular to the secondary grid line.

5. The battery cell stringing method according to claim 4, characterized in that: Before placing the battery sheet on the second printing table of the second printing mechanism by the transport mechanism, the method further includes: The battery cell is placed on a second visual positioning platform of a second visual inspection mechanism by a conveying mechanism, and the front side of the battery cell is photographed and positioned by the second visual inspection mechanism.

6. The method for stringing cells according to claim 1, wherein: The specific operation of placing the welding ribbon segment on the first adhesive tape of the previous battery cell and on the second adhesive tape of the next battery cell to form a battery string is: The previous battery cell is placed on the conveyor belt by the conveying mechanism, the welding tape segment is pulled onto the conveyor belt by the pulling hand of the welding tape mechanism so that the front half of the welding tape segment is placed on the first tape of the previous battery cell, and the rear battery cell is placed on the conveyor belt by the conveying mechanism so that the rear half of the welding tape segment is placed on the second tape of the rear battery cell, and this is repeated N times to form a battery string.

7. The method for stringing cells according to claim 6, characterized in that: While the battery string is being formed, the battery cells are heated by the conveyor belt having a heating function, and a pressing plate is placed on the battery cells by a conveying mechanism so that the pressing plate applies pressure to the battery cells.

8. The method for stringing cells according to claim 7, characterized in that: The specific operation of curing the battery string is: The battery string is placed on a curing platform of a curing furnace by a conveying mechanism, and the battery string is heated and pressurized by a heating device and a pressurizing device in the curing furnace.

9. The method for stringing cells according to claim 1, wherein: The first adhesive tape and the second adhesive tape are made of one of epoxy resin adhesive and organic silicone.

10. A battery cell stringing device, characterized in that: include: A printing mechanism, having a printing table for placing a battery cell, wherein the printing mechanism sets a first adhesive tape on the reverse side of the battery cell in a direction intersecting with the secondary grid line, or sets a second adhesive tape on the front side of the battery cell in a direction intersecting with the secondary grid line; A flipping mechanism, having a flipping station for placing the battery cell, and the flipping mechanism flips the battery cell 180 degrees; A transport mechanism, wherein the transport mechanism transports the battery cell; A soldering ribbon mechanism, comprising a soldering ribbon roll wound with soldering ribbon, a cutting component for cutting the soldering ribbon unwound from the soldering ribbon roll into soldering ribbon segments, and a pulling hand for pulling the soldering ribbon segments onto a conveyor belt, wherein the soldering ribbon mechanism cooperates with the conveying mechanism to place the soldering ribbon segments on the first adhesive tape of the preceding battery cell and on the second adhesive tape of the succeeding battery cell to form a battery string; A curing furnace is provided with a curing platform for placing the battery cell, and the curing furnace performs a curing process on the battery string so that the secondary grid line on the battery cell is in contact with and fixedly connected to the welding belt segment.

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