Welding strip pressing tool and series welding machine

Abstract

The utility model provides a welding strip pressing tool and a series welding machine. The welding strip pressing tool comprises a frame. The plurality of pressing needle rows are arranged on the frame, each pressing needle row comprises a plurality of pressing needles which are arranged along a straight line, each pressing needle row is configured to press a welding strip, the welding strip comprises a first branch part which is positioned on the inner side of a cell projection area and a second branch part which extends out of the cell projection area, and the first branch part is positioned on the inner side of the cell projection area. The second branch part is positioned between two adjacent battery pieces; and in each pressing needle row, at least one pressing needle is used for pressing the second part of the welding strip, and the other pressing needles are used for pressing the first part of the welding strip. The welding strip pressing tool is pressed on the tail battery piece of the battery string, the welding strip can be pressed on the tail battery piece, meanwhile, the inter-string welding strip located between the tail battery piece and the head battery piece of the next battery string can be pressed, and bending deformation of the inter-string welding strip after welding is avoided.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic cell module production, and particularly to a solder ribbon pressing tooling and a string welding machine. Background Art

[0002] During the process of welding a battery string, the battery wafers and the solder ribbons are continuously stacked on a welding conveyor belt according to the stringing rules of the battery string, and then are successively conveyed below a welding device for heating and welding.

[0003] During the stacking process, the positive and negative electrodes of two adjacent battery wafers in the same battery string are connected in series by a solder ribbon, and the length of the solder ribbon located between two adjacent battery wafers (between wafers) is short; while between two adjacent battery strings, the tail battery wafer of the previous battery string and the head battery wafer of the next battery string are also connected in series by a solder ribbon, and the length of the solder ribbon located between the above-mentioned tail battery wafer and head battery wafer (between strings) is long. After welding, the inter-string solder ribbon will be cut off to obtain a single battery string.

[0004] In order to ensure the welding quality of the battery wafers and the solder ribbons, a solder ribbon pressing tooling is also used to press the solder ribbon onto the battery wafers before welding. For the existing solder ribbon pressing tooling, the pressing range is only limited to the inner side of the battery wafer, that is, it can only press the solder ribbon located directly above or below the battery wafer.

[0005] Due to the short length, the inter-wafer solder ribbon is not easily deformed after welding. However, due to the long length of the inter-string solder ribbon and the lack of any control, during the heating and welding process, the inter-string solder ribbon is easily bent and deformed due to thermal expansion and contraction, resulting in poor soldering of the solder joints adjacent to the inter-string solder ribbon, and the inter-string solder ribbon is also in a bent or warped state after being cut off, which is not conducive to subsequent layout and bus bar welding operations. Summary of the Utility Model

[0006] Aiming at the above technical problems, the utility model provides a solder ribbon pressing tooling, and its detailed technical solution is as follows:

[0007] A solder ribbon pressing tooling includes:

[0008] A frame;

[0009] A plurality of press needle rows arranged on the frame, each press needle row includes a plurality of press needles arranged in a straight line, and each press needle row is configured to press a solder ribbon. The solder ribbon includes a first part located inside the projection area of the battery wafer and a second part extending out of the projection area of the battery wafer, and the second part is located between two adjacent battery wafers;

[0010] In each press needle row, at least one press needle is used to press the second part of the solder ribbon, and the remaining press needles are used to press the first part of the solder ribbon.

[0011] The solder ribbon pressing tool provided by the present application can not only press the solder ribbon inside the projection area of the battery cell, but also press the solder ribbon extending out of the projection area of the battery cell at the same time. In the actual production of the battery string, the solder ribbon pressing tool of the present application can be pressed on the tail battery cell of the battery string, so as to realize pressing the solder ribbon on the tail battery cell and at the same time pressing the inter-string solder ribbon between the tail battery cell and the head battery cell of the next battery string, avoiding bending deformation of the inter-string solder ribbon during the welding process and ensuring the welding quality of the battery string.

[0012] In some embodiments, in each row of pressing pins, the number of pressing pins for pressing the second part of the solder ribbon is one, two or three.

[0013] The number of pressing pins for pressing the second part of the solder ribbon can be flexibly selected according to the actual length of the inter-string solder ribbon and the desired pressing effect.

[0014] In some embodiments, each pressing pin in each row of pressing pins is elastically mounted on the frame.

[0015] By elastically mounting the pressing pins on the frame, it can be ensured that each pressing pin can effectively contact and press the solder ribbon.

[0016] In some embodiments, a vertical through hole is provided on the frame corresponding to each pressing pin, and the pressing pin is slidably inserted up and down in the corresponding vertical through hole. The upper end of the pressing pin passes upward through the vertical through hole and is limited by a retaining piece, and the lower end of the pressing pin extends downward out of the frame; a spring is also sleeved on the pressing pin, the upper end of the spring abuts against the frame, and the lower end of the spring abuts against the pressing pin.

[0017] A specific installation method of the pressing pin is provided, and the elastic connection between the pressing pin and the frame is realized through the spring.

[0018] In some embodiments, the pressing pins at the head end of each row of pressing pins are all the first type of pressing pins, where the head end of the row of pressing pins is the end far from the second part of the solder ribbon; the pressing pins at the non-head end of each row of pressing pins include the first type of pressing pins and one or both of the second type of pressing pins, and the length of the first type of pressing pins is shorter than the length of the second type of pressing pins.

[0019] The stacking of the solder tapes is usually carried out by the solder tape traction mechanism clamping the head end of the solder tape and moving it for laying. When using the solder tape pressing tooling to press the solder tape clamped by the chuck of the solder tape traction mechanism, by controlling the height of the solder tape pressing tooling, it can be ensured that the longer second type of pressing needles in the pressing needle row first press onto the solder tape, and the shorter first type of pressing needles at the head ends of each pressing needle row do not contact the head end of the solder tape, so as to achieve the pressing and positioning of the solder tape on the one hand, and avoid the head end of the solder tape in the lifted state from being pressed and deformed on the other hand; when the solder tape traction mechanism releases the head end of the solder tape, control the solder tape pressing tooling to continue to descend, so that the shorter first type of pressing needles at the head ends of each pressing needle row finally press on the head end of the solder tape, thus effectively avoiding the occurrence of the warping phenomenon.

[0020] In some embodiments, the pressing needles at the tail ends of each pressing needle row are all of the first type, where the tail end of the pressing needle row is the end close to the second part of the solder tape.

[0021] With such a setting, when placing the solder tape pressing tooling, there is no need to distinguish between the head end and the tail end of the pressing needle row, and either the head end or the tail end of the pressing needle row can be placed close to the head end of the solder tape.

[0022] In some embodiments, an emptying groove is provided at the bottom of each pressing needle.

[0023] For the battery cell with solder pads, it can be controlled that the pressing needles press at the solder pad positions. By setting the emptying groove, the solder pads can be accommodated in the emptying groove, realizing the avoidance of the solder pads while pressing the solder tape.

[0024] In some embodiments, the frame is a hollow frame; magnets are respectively installed at both ends of the frame; anti-slip pads are installed on the bottom surfaces at both ends of the frame.

[0025] The hollow design of the frame can, on the one hand, reduce the weight of the frame, and on the other hand, reduce the shielding of the battery cell and the solder tape, facilitating welding; by installing magnets at both ends of the frame, it is convenient to carry the tooling in a magnetic adsorption manner; by setting anti-slip pads at the bottom of the frame, the tooling can be prevented from slipping during transportation.

[0026] In some embodiments, the length of the solder tape in the second part of the solder tape that is pressed accounts for 1 / 3 - 2 / 3 of the total length of the second part.

[0027] Through the above setting, the pressing of the second part of the solder tape can be effectively implemented, and it is convenient for the manufacturing of the tooling.

[0028] In some embodiments, the needle pitch at the head end of the same pressing needle row is equal to the needle pitch at the tail end.

[0029] Through the above setting, the tooling does not need to distinguish between the head and the tail during use, and the pressing needles at the head and the tail of the tooling can both be suitable for pressing the second part of the solder tape, making the use more flexible.

[0030] The present application also provides a string welding machine, which includes a welding conveying device, a tooling picking and placing mechanism, a solder tape laying mechanism, and a battery cell laying mechanism, wherein:

[0031] The solder tape laying mechanism and the battery cell laying mechanism are used to continuously stack solder tapes and battery cells on the conveying surface of the welding conveying device according to the stringing rules of the battery string;

[0032] The tooling picking and placing mechanism is used to pick up tooling, and the tooling includes a first type of tooling and a second type of tooling. The pressing area of the first type of tooling is located inside the projection area of the battery cell, and the second type of tooling is the solder tape pressing tooling described in any one of the above;

[0033] The tooling picking and placing mechanism is also used to place the picked first type of tooling on the non-tail battery cells in the same battery string, so that the first type of tooling presses the solder tape on the corresponding non-tail battery cells. The tooling picking and placing mechanism is also used to place the picked second type of tooling on the tail battery cell in the battery string, so that the second type of tooling can press the first part of the solder tape on the tail battery cell, and press the second part of the solder tape on the conveying surface of the welding conveying device. The second part of the solder tape is located between the tail battery cell and the head battery cell of the next battery string.

[0034] By using two types of tooling to press the tail pieces and non-tail pieces respectively during the laying and stacking process of the battery cells and the solder tapes, it can ensure that the solder tapes located at the inter-string positions will not be bent and deformed after welding.

[0035] In some embodiments, the string welding machine further includes a tooling conveying mechanism, a welding mechanism, and a tooling discharging mechanism, wherein:

[0036] The tooling conveying mechanism is arranged on the side of the welding conveying device and is used to convey the first type of tooling and the second type of tooling. A tooling loading station and a tooling unloading station are respectively arranged on the conveying path of the tooling conveying mechanism;

[0037] The tooling picking and placing mechanism is used to pick up the first type of tooling or the second type of tooling conveyed to the tooling loading station;

[0038] The welding mechanism is arranged above or below the welding conveying device and is used to weld the battery cells and solder tapes pressed by the tooling;

[0039] The tooling discharging mechanism is arranged after the welding mechanism and is used to pick up the tooling from the welding conveying device and transport the tooling to the tooling unloading station of the tooling conveying mechanism.

[0040] By setting the welding mechanism, the welding between the pressed battery cells and solder tapes is realized; through the cooperation of the tooling conveying mechanism, the tooling picking and placing mechanism, and the tooling discharging mechanism, the on-line cyclic use of the first type of tooling and the second type of tooling is realized, ensuring the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the stacking structure of existing battery cells and welding ribbons on a welding conveyor belt;

[0042] Figure 2 Schematic diagram of the top view of the welding ribbon pressing tool in the embodiment of the present application;

[0043] Figure 3 for Figure 2 AA section view;

[0044] Figure 4 Schematic diagram of the three-dimensional structure of the welding ribbon pressing tool in the embodiment of the present application;

[0045] Figure 5 Schematic diagram of the positions of the first and second subsections of the welding strip in an embodiment of the present application;

[0046] Figure 6 This is a schematic diagram of the use state of the welding ribbon pressing tool in the embodiment of the present application;

[0047] Figure 7 for Figure 6 A top view of

[0048] Figure 8 A top view of the string welding machine in an embodiment of the present application;

[0049] Figure 9 This is a schematic diagram of the placement of the first type of tooling and the second type of tooling in the embodiment of the present application;

[0050] Figures 1 to 9 Included are:

[0051] Frame 1:

[0052] Press needle row 2;

[0053] Pressing needle 3: first type pressing needle 31, second type pressing needle 32, and air-avoiding groove 33;

[0054] Baffle 4;

[0055] Spring 5;

[0056] Magnet 6;

[0057] Anti-slip mat 7;

[0058] Welding conveyor 81, tooling pick-up and placement mechanism 82, welding ribbon placement mechanism 83, cell placement mechanism 84, tooling conveying mechanism 85, tooling loading station 851, tooling unloading station 852, welding mechanism 86, tooling unloading mechanism 87, cell loading and conveying line 88;

[0059] The first type of tooling 91 and the second type of tooling 92;

[0060] Solar cells 10: the tail solar cell 100 and the head solar cell 101;

[0061] Solder tapes 20: the first branch 201 and the second branch 202. Detailed implementation manners

[0062] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0063] Taking Figure 1 as an example, during the process of welding a battery string, the solar cells 10 and the solder tapes 20 are continuously stacked on a welding conveyor belt according to the stringing rules of the battery string. Figure 1 A string of battery string in Figure 1 contains a total of 12 solar cells 10 (i.e., the 1st to the 12th solar cells counted from the right in Figure 1 ). It can be seen that in the same battery string, the length of the solder tape (i.e., the inter-sheet solder tape) between two adjacent solar cells 10 is shorter, and the inter-sheet solder tape is not easily bent and deformed after welding heating. And the 12th solar cell counted from the right in

[0064] is the tail solar cell 100 of the battery string, and the 13th solar cell counted from the right is the head solar cell 101 of the next battery string. The length of the solder tape (i.e., the inter-string solder tape) between the tail solar cell 100 and the head solar cell 101 is longer, and it is easily bent and deformed after welding. Figures 2 to 7 As shown in

[0065] To solve the technical problem that the inter-string solder tape is easily bent and deformed after welding, the solder tape pressing tooling provided in the embodiment of the present application includes:

[0066] A frame 1;

[0067] A plurality of press needle rows 2 arranged on the frame 1. Each press needle row 2 includes a plurality of press needles 3 arranged in a straight line. Each press needle row 2 is configured to press a solder tape 20. The solder tape 20 includes a first branch 201 located inside the projection area of the solar cell and a second branch 202 extending out of the projection area of the solar cell, and the second branch 202 is located between two adjacent solar cells;

[0068] In each press needle row 2, at least one press needle 3 is used to press the second branch 202 of the solder tape 20, and the remaining press needles 3 are used to press the first branch 201 of the solder tape 20.

[0068] The solder tape pressing tooling provided in the present application can not only press the solder tape located inside the projection area of the solar cell 10, but also press the solder tape extending out of the projection area of the solar cell 10 at the same time. As shown in Figure 6 and Figure 7As shown, in the actual production of a battery string, the solder tape pressing tooling of the present application can be pressed on the tail cell 100 of the battery string, so that while the solder tape is pressed on the tail cell 100, the inter-string solder tape (i.e., the second part 202 of the solder tape) between the tail cell 100 and the head cell 101 of the next battery string can also be pressed, avoiding bending deformation of the inter-string solder tape during the welding process and ensuring the welding quality of the battery string.

[0069] Optionally, in the solder tape pressing tooling in the embodiments of the present application, in each press pin row 2, the number of press pins 3 for pressing the second part 202 of the solder tape 20 is one, two, or three. As Figure 6 shown, in each press pin row 2, the number of press pins 3 for pressing the second part 202 of the solder tape 20 is two, that is, Figure 6 the two press pins located within the rectangular dotted line frame in.

[0070] The number of press pins 3 for pressing the second part 202 of the solder tape 20 can be flexibly selected according to the actual length of the second part 202 and the desired pressing effect. When the second part 202 is relatively long, and space permits, multiple press pins 3 can be set to press the second part 202 to increase the length of the second part 202 being pressed and improve the pressing effect; when the second part 202 is relatively short, only one press pin 3 can also be used to press the second part 202.

[0071] As Figure 3 shown, optionally, each press pin 3 in each press pin row 2 is elastically mounted on the frame 1. By elastically mounting the press pins 3 on the frame 1, it can be ensured that each press pin 3 can effectively contact and press the solder tape.

[0072] In some embodiments, a vertical through hole is provided on the frame 1 corresponding to each press pin 3, and the press pin 3 is slidably inserted into the corresponding vertical through hole up and down. The upper end of the press pin 3 passes upward through the vertical through hole and is limited by a retaining piece 4, and the lower end of the press pin 3 extends downward out of the frame 1; a spring 5 is also sleeved on the press pin 3, the upper end of the spring 5 abuts against the frame 1, and the lower end of the spring 5 abuts against the press pin 3.

[0073] In some embodiments, as Figure 6 shown, each press pin 3 at the head end of each press pin row 2 is a first type of press pin 31, where the head end of the press pin row 2 is the end far from the second part 202 of the solder tape 20; each press pin 3 at the non-head end of each press pin row 2 includes one or both of the second type of press pin 32 and the first type of press pin 31, and the length of the first type of press pin 31 is shorter than the length of the second type of press pin 32.

[0074] The overlapping of the solder tapes is usually carried out by clamping the head end of the solder tape with a solder tape traction mechanism and moving and laying it. When the solder tape pressing tooling of the embodiment of the present application presses the solder tape clamped by the chuck of the solder tape traction mechanism, by controlling the height of the solder tape pressing tooling, it can be ensured that the longer second type of pressing needles 32 in the pressing needle row 2 first press onto the solder tape, and the shorter first type of pressing needles 31 at the head end of each pressing needle row 2 do not contact the head end of the solder tape, so that on the one hand, the pressing and positioning of the solder tape are realized, and on the other hand, the head end of the solder tape in the lifted state is prevented from being pressed and deformed; when the solder tape traction mechanism releases the head end of the solder tape, control the solder tape pressing tooling to continue to descend, so that the shorter first type of pressing needles 31 at the head end of each pressing needle row 2 finally press on the head end of the solder tape, thereby effectively avoiding the occurrence of the warping phenomenon.

[0075] In some embodiments, as Figure 6 shown, the pressing needles 3 at the tail end of each pressing needle row 2 are all the first type of pressing needles 31, where the tail end of the pressing needle row 2 is the end close to the second part 202 of the solder tape 20. With such a setting, when placing the solder tape pressing tooling, there is no need to distinguish the head end and the tail end of the pressing needle row, and either the head end or the tail end of the pressing needle row can be placed close to the head end of the solder tape.

[0076] In some embodiments, as Figure 3 shown, an avoidance groove 33 is provided at the bottom of each pressing needle 3. In order to improve the welding strength between the battery cell and the solder tape, a plurality of welding points are usually arranged at intervals on the battery cell along the laying path of each solder tape. For the battery cell with welding points, the pressing needle 3 usually presses at the welding point. By providing the avoidance groove 33, the welding point can be accommodated in the avoidance groove 33 to realize avoiding the welding point while pressing the solder tape.

[0077] In some embodiments, as Figure 4 shown, the frame 1 is a hollow frame; magnets 6 are respectively installed at both ends of the frame 1; anti-slip pads 7 are installed on the bottom surfaces at both ends of the frame 1.

[0078] The hollow design of the frame 1 can, on the one hand, reduce the weight of the frame 1, and on the other hand, reduce the shielding of the battery cell and the solder tape, which is convenient for welding; by installing the magnets 6 at both ends of the frame 1, on the one hand, the magnets 6 installed above both ends of the frame 1 can facilitate the handling of the tooling by magnetic adsorption from above, and on the other hand, the magnets installed below both ends of the frame can also facilitate the adsorption of the tooling by magnetic adsorption from below the tooling, improving the pressing force of the pressing needles 3 on the tooling on the solder tape; by providing the anti-slip pads 7 at the bottom of the frame 1, the tooling can be prevented from slipping during the conveying process.

[0079] In some embodiments, the length of the soldering ribbon in the second part 202 of the soldering ribbon 20 that is pressed accounts for 1 / 3 to 2 / 3 of the total length of the second part 202. When the length of the soldering ribbon in the second part that is pressed is less than 1 / 3 of the total length of the second part, there will be a relatively long inter-string soldering ribbon that is not controlled, which is likely to increase the deformation amount of the inter-string soldering ribbon after soldering. After the length of the soldering ribbon in the second part that is pressed is greater than 2 / 3 of the total length of the second part, more pressing pins will be required to press the second part of the soldering ribbon, and setting multiple pressing pins in a limited space will increase the installation difficulty of each pressing pin for pressing the second part. Optionally, the length of the soldering ribbon in the second part that is pressed accounts for 1 / 2 of the total length of the second part.

[0080] In some embodiments, as Figure 2 shown, the pressing pin spacing at the head end of the same pressing pin row 2 is equal to the pressing pin spacing at the tail end. To improve the pressing effect on the second part of the soldering ribbon, it may be necessary to set more than 2 pressing pins to press the second part of the soldering ribbon, resulting in the pressing pin spacing for pressing the second part may be smaller than the pressing pin spacing for pressing the first part. By setting the pressing pin spacing at the head end of the pressing pin row to be equal to the pressing pin spacing at the tail end, the tooling does not need to distinguish between the head and the tail during use, and the pressing pins at both ends can be used to press the inter-string soldering ribbon, making it more flexible to use.

[0081] The embodiment of the present application also provides a string welding machine, as Figures 8 to 9 shown, which includes a welding conveying device 81, a tooling picking and placing mechanism 82, a soldering ribbon laying mechanism 83, and a battery cell laying mechanism 84, wherein:

[0082] The soldering ribbon laying mechanism 83 and the battery cell laying mechanism 84 are used to continuously stack the soldering ribbon and the battery cells on the conveying surface of the welding conveying device 81 according to the stringing rules of the battery string, and the welding conveying device 81 is used to convey the battery cells along Figure 8 the X direction in

[0083] The tooling picking and placing mechanism 82 is used to pick up the tooling. The tooling includes a first type of tooling 91 and a second type of tooling 92. The pressing area of the first type of tooling 91 is located inside the projection area of the battery cell, and the second type of tooling 92 is the soldering ribbon pressing tooling described in any one of the above.

[0084] The tooling picking and placing mechanism 82 is also used to place the picked first type of tooling 91 on non-tail battery cells in the same battery string, so that the first type of tooling 91 presses the welding tape 20 against the corresponding non-tail battery cells. The tooling picking and placing mechanism 82 is also used to place the picked second type of tooling 92 on the tail battery cell 100 in the battery string, so that the second type of tooling 92 can press the first part 201 of the welding tape 20 against the tail battery cell, and press the second part 202 of the welding tape 20 against the conveying surface of the welding conveying device 81. The second part 202 of the welding tape 20 is located between the tail battery cell 100 and the head battery cell 101 of the next battery string.

[0085] Among them, the non-tail battery cell refers to the remaining battery cells in the same battery string except the tail battery cell 100, and the head battery cell 101 belongs to the non-tail battery cells.

[0086] The first type of tooling 91 is a prior art, and any existing structure of welding tape pressing tooling can be adopted.

[0087] By respectively using two types of tooling to press the tail battery cells and non-tail battery cells during the laying and stacking process of the battery cells and the welding tape, it can be ensured that the welding tape located at the inter-string position will not be bent and deformed after welding.

[0088] In some embodiments, the string welding machine further includes a tooling conveying mechanism 85, a welding mechanism 86 and a tooling blanking mechanism 87, where: [[ID=X]] [[ID=Y]]

[0089] The tooling conveying mechanism 85 is arranged on the side of the welding conveying device 81 and is used to convey the first type of tooling 91 and the second type of tooling 92. Among them, the first type of tooling 91 and the second type of tooling 92 have been arranged on the tooling conveying mechanism 85 according to a predetermined quantity and arrangement order. A tooling loading station 851 and a tooling blanking station 852 are respectively arranged on the conveying path of the tooling conveying mechanism 85;

[0090] The tooling picking and placing mechanism 82 is used to pick up the first type of tooling 91 or the second type of tooling 92 conveyed to the tooling loading station 851;

[0091] The welding mechanism 86 is arranged above or below the welding conveying device 81 and is used to weld the battery cells and the welding tape pressed by the tooling;

[0092] The tooling blanking mechanism 87 is arranged after the welding mechanism 86 and is used to pick up the tooling from the welding conveying device 81 and transport the tooling to the tooling blanking station 852 of the tooling conveying mechanism 85.

[0093] The welding mechanism 86 can adopt common welding methods such as infrared lamp boxes and lasers to implement the welding of the battery cells and the welding tape.

[0094] Through the setting of the welding mechanism 86, the welding between the pressed solar cell and the welding tape is realized; through the cooperation of the tooling conveying mechanism 85, the tooling picking and placing mechanism 82 and the tooling blanking mechanism 87, the online recycling of the first type of tooling 91 and the second type of tooling 92 is realized, ensuring the welding efficiency.

[0095] Optionally, the string welding machine according to the embodiment of the present application further includes a solar cell loading conveyor line 88 for continuously providing solar cells for the solar cell laying mechanism, and the solar cell loading conveyor line 88 and the tooling conveying mechanism 85 are arranged on the same side of the welding conveying device 81.

[0096] The above has described the present invention in sufficient detail with a certain particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the protection scope of the present invention. The scope of protection required by the present invention is defined by the claims described, rather than by the above description in the embodiments.

Claims

1. A solder strip pressing tooling, characterized in that, The solder tape pressing tooling includes: A frame; A plurality of press needle rows provided on the frame, each press needle row includes a plurality of press needles arranged in a straight line, and each press needle row is configured to press a solder tape. The solder tape includes a first part located inside the projection area of the battery cell and a second part extending out of the projection area of the battery cell, and the second part is located between two adjacent battery cells; In each press needle row, at least one press needle is used to press the second part of the solder tape, and the remaining press needles are used to press the first part of the solder tape.

2. The solder strip pressing tooling according to claim 1, wherein, In each press needle row, the number of press needles used to press the second part of the solder tape is one, two or three.

3. The solder strip pressing tooling according to claim 1, characterized in that: Each press needle in each press needle row is elastically mounted on the frame.

4. The solder strip pressing tooling according to claim 3, characterized in that: A vertical through hole is provided on the frame corresponding to each press needle, and the press needle is slidably inserted into the corresponding vertical through hole. The upper end of the press needle passes upward through the vertical through hole and is limited by a retaining piece, and the lower end of the press needle extends downward out of the frame; A spring is further sleeved on the press needle, the upper end of the spring abuts against the frame, and the lower end of the spring abuts against the press needle.

5. The solder tape pressing tooling according to claim 1, wherein: The press needles at the head end of each press needle row are all first-class press needles, wherein the head end of the press needle row is the end far from the second part of the solder tape; The press needles at the non-head end of each press needle row include the second-class press needles and one or both of the first-class press needles, and the length of the first-class press needle is shorter than that of the second-class press needle.

6. The solder strip pressing tooling according to claim 5, characterized in that The press needles at the tail end of each press needle row are all the first-class press needles, wherein the tail end of the press needle row is the end close to the second part of the solder tape.

7. The solder strip pressing tooling according to claim 1, wherein A clearance groove is provided at the bottom of each press needle.

8. The solder tape pressing tooling according to claim 1, wherein: The frame is a hollow frame; Magnets are respectively installed at both ends of the frame; Anti-slip pads are installed on the bottom surfaces at both ends of the frame.

9. The welding tape pressing tooling according to claim 1, wherein The length of the solder tape pressed in the second part of the solder tape accounts for 1 / 3 to 2 / 3 of the total length of the second part.

10. The solder strip pressing tooling according to claim 9, wherein, The press needle spacing at the head end of the same press needle row is equal to the press needle spacing at the tail end.

11. A string welding machine, characterized in that, The string welding machine includes a welding conveying device, a tooling picking and placing mechanism, a solder tape laying mechanism and a battery cell laying mechanism, wherein: The solder tape laying mechanism and the battery cell laying mechanism are used to continuously stack solder tapes and battery cells on the conveying surface of the welding conveying device according to the stringing rules of the battery string; The tooling picking and placing mechanism is used to pick up tooling. The tooling includes a first-class tooling and a second-class tooling. The pressing area of the first-class tooling is located inside the projection area of the battery cell, and the second-class tooling is the solder tape pressing tooling according to any one of claims 1 to 10; The tool loading and unloading mechanism is also used to place the picked first type of tool on the non-tail solar cells in the same solar cell string, so that the first type of tool presses the welding tape against the corresponding non-tail solar cells. The tool loading and unloading mechanism is also used to place the picked second type of tool on the tail solar cell in the solar cell string, so that the second type of tool can press the first part of the welding tape against the tail solar cell, and press the second part of the welding tape against the conveying surface of the welding conveying device. The second part of the welding tape is located between the tail solar cell and the head solar cell of the next solar cell string.

12. The string welding machine according to claim 11, characterized in that, The string welding machine further includes a tool conveying mechanism, a welding mechanism, and a tool unloading mechanism, where: The tool conveying mechanism is arranged on the side of the welding conveying device and is used to convey the first type of tool and the second type of tool. A tool loading station and a tool unloading station are respectively arranged on the conveying path of the tool conveying mechanism; The tool loading and unloading mechanism is used to pick up the first type of tool or the second type of tool conveyed to the tool loading station; The welding mechanism is arranged above or below the welding conveying device and is used to weld the solar cells and the welding tape pressed by the tool; The tool unloading mechanism is arranged after the welding mechanism and is used to pick up the tool from the welding conveying device and transport the tool to the tool unloading station of the tool conveying mechanism.

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