A method and device for serial welding of solar cell components

Abstract

The invention discloses a method and device for serial welding of solar cell modules, and relates to the technical field of serial welding of solar cell chips, including a traction mechanism and a lifting mechanism that move between a cutting mechanism and a welding position; the welding strip is pulled by the traction mechanism, and at the same time, the lifting mechanism contacts the welding strip upward, and after the traction mechanism and the lifting mechanism move at the same speed and in the same direction for a set distance, the cutting mechanism cuts off the welding strip; the welding strip is clamped by the lifting mechanism, and the running speed of the traction mechanism is controlled to be greater than the running speed of the lifting mechanism, so that the lifting mechanism forms a tensioning force on the welding strip relative to the traction mechanism; when the traction mechanism reaches the welding position, the lifting mechanism releases the welding strip, and a traction is completed, and the traction mechanism and the lifting mechanism are reset, and the next traction operation on the welding strip is performed. The invention tensions and straightens the welding strip during the traction process of the string welding machine, and uses the speed difference between the lifting mechanism and the traction mechanism during the operation process to form traction and tensioning of the welding strip, which has a good guiding effect.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell series welding processing, and more specifically to a solar cell module series welding method and device. Background Art

[0002] The stringer is one of the important equipment in the production process of solar panels. It is used to weld individual cells into strings. Before welding, the welding ribbon needs to be pulled out and pre-pressed on the cell to fix it. Traditional stringers are usually compatible with 2 to 6 grids. The welding ribbon pulling device is used to pull the fixed-length welding ribbon from the welding ribbon feeding device directly to the position of the cell on the conveyor belt.

[0003] At present, the demand for photovoltaic cell modules is increasing. In the production process of photovoltaic cell modules, it is necessary to weld the welding strip to the main grid line of the cell online, especially in the welding of multi-grid string welding machine, the grid lines of the cell are many and thin. More grid lines will lead to more welding strips, and thin grid lines require thin welding strips. In addition, the welding strips used in the welding of multi-grid string welding machine are round welding strips, which are easy to roll and easily shift during the production process, resulting in the welding strips not being accurately welded to the main grid line.

[0004] For example, the patent with the authorization announcement date of June 5, 2013, application number 201220617765.6, and name "Soldering ribbon and battery cell pressing device for solar cell string welding head". In this patent scheme, when the ribbon pulling and laying device places the soldering ribbon on the main grid line of the solar cell, the pressing needle cannot correct the position of the soldering ribbon and the main grid line of the battery cell, and can only make the soldering ribbon and the battery cell fit tightly. Therefore, the thinner round soldering ribbon cannot be completely aligned with the main grid line on the dense grid solar cell, resulting in the soldering ribbon being difficult to pull and position, and it is very easy to deviate, which is very inconvenient for welding.

[0005] Therefore, how to provide a method and device for string welding of solar cell modules that can facilitate the pulling and alignment of welding ribbons is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0006] In view of this, the present invention provides a solar cell module series welding method and device, aiming to solve the above technical problems.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A solar cell assembly series welding method comprises the following steps:

[0009] S1. The welding strip is pulled by the pulling mechanism, and the lifting mechanism moves upward to contact the welding strip. After the pulling mechanism and the lifting mechanism move at the same speed and in the same direction for a set distance, the cutting mechanism cuts off the welding strip;

[0010] S2, clamping the welding strip with the lifting mechanism, controlling the running speed of the traction mechanism to be greater than the running speed of the lifting mechanism, so that the lifting mechanism forms a tensioning force on the welding strip relative to the traction mechanism;

[0011] S3. When the traction mechanism reaches the welding position, the lifting mechanism releases the welding strip, completing one traction, and the traction mechanism and the lifting mechanism are reset to perform the next traction operation on the welding strip.

[0012] Through the above technical scheme, the solar cell assembly string welding method provided by the present invention utilizes the speed difference between the lifting mechanism and the traction mechanism during operation to form traction and tensioning of the welding strip, so that after the welding strip is cut, when it is run toward the welding position by the cutting mechanism, the tensioning and straightening operation is completed, so that the welding strip can be positioned during the traction process, preventing the welding strip from running off, facilitating welding, and improving the welding quality.

[0013] Preferably, in the above-mentioned solar cell assembly string welding method, when the lifting mechanism releases the welding strip, the clamping point of the lifting mechanism corresponds to the end of the welding strip, which can satisfy the complete tensioning control of the entire welding strip and has a better guiding effect.

[0014] Preferably, in the above-mentioned method for serial welding of solar cell modules, the clamping point of the lifting mechanism is located at one end of the lifting mechanism away from the cutting mechanism, so as to achieve a more complete control effect on the tensioning and straightening of the welding strip.

[0015] Preferably, in the above-mentioned method for serially welding solar cell modules, after the lifting mechanism releases the welding ribbon, it first performs a vertical downward movement, and then performs a horizontal linear resetting movement. The movement of the lifting mechanism can satisfy the position interference during the resetting process.

[0016] The present invention also provides a solar cell assembly string welding device, including a traction mechanism and a lifting mechanism operating between a cutting mechanism and a welding position;

[0017] The traction mechanism includes a first bracket that reciprocates on a first track, and a traction manipulator installed on the first bracket;

[0018] The lifting mechanism includes a second bracket that reciprocates on a second track, a cylinder is fixed on the second bracket, a telescopic rod of the cylinder faces upward, and a lifting plate is fixed to the upward end of the telescopic rod, a plurality of positioning grooves corresponding to the welding strips are provided on the lifting plate, and a clamping portion is provided at one end of the positioning groove away from the cutting mechanism.

[0019] Through the above technical scheme, the solar cell module string welding device provided by the present invention is provided with a clamping part in the positioning groove of the lifting plate, which can clamp the welding strip to meet the clamping requirements of the welding strip, and cooperate with the speed difference between the lifting mechanism and the traction mechanism to achieve a good guiding effect.

[0020] Preferably, in the above-mentioned solar cell assembly string welding device, the clamping part includes air bags arranged on both side walls of the lower part of the positioning groove, and the second bracket is connected with an air pipe, and the joint of the air pipe is connected to the air bag. In order to meet the adaptive tensioning and straightening of the welding strip and avoid breakage due to excessive clamping force, the present invention adopts an air bag clamping structure, which has a flexible and reliable clamping effect, taking into account the stability of clamping and the protection of the welding strip.

[0021] Preferably, in the above-mentioned solar cell assembly string welding device, when the telescopic rod of the cylinder moves upward to the right position, the airbag is inflated and expanded; when the lifting mechanism moves close to the welding position, the airbag is deflated and contracted. By controlling the expansion and contraction of the airbag, the welding strip can be clamped and released in time to meet the guidance requirements.

[0022] Preferably, in the above-mentioned solar cell assembly string welding device, the two side walls of the positioning groove away from one end of the cutting mechanism are fixed with corresponding guide blocks, and the corresponding surfaces of the two guide blocks are inclined at the upper part and vertical at the lower part, so that the two guide blocks form a trumpet shape that is wide at the top and narrow at the bottom, and the two guide blocks are respectively located above the two air bags. The design of the guide blocks allows the welding strip to enter the space inside the guide blocks to complete the standard guide clamping.

[0023] Preferably, in the above-mentioned solar cell assembly string welding device, a support block is fixed to the bottom wall of the positioning groove away from the cutting mechanism, and the support block is located below the two air bags. By providing the support block, it can form a clamping space with the guide block and the air bag, which has a better clamping effect.

[0024] Preferably, in the above-mentioned solar cell assembly string welding device, the end of the positioning groove close to the cutting mechanism is a bell-mouth structure. The bell-mouth structure can guide the welding strip so that it can accurately enter the positioning groove.

[0025] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a method and device for serial welding of solar cell modules, which has the following beneficial effects:

[0026] 1. The solar cell assembly string welding method provided by the present invention utilizes the speed difference between the lifting mechanism and the traction mechanism during operation to form traction and tensioning of the welding strip, so that after the welding strip is cut, when the traction mechanism runs toward the welding position, the tensioning and straightening operation is completed, so that the welding strip can be positioned during the traction process, thereby preventing the welding strip from running off, facilitating welding, and improving the welding quality.

[0027] 2. The solar cell assembly string welding device provided by the present invention is provided with a clamping part in the positioning groove of the lifting plate, which can clamp the welding strip to meet the clamping requirements of the welding strip, and cooperate with the speed difference between the lifting mechanism and the traction mechanism to achieve a good guiding effect.

[0028] 3. The present invention adopts an airbag clamping structure, which can not only meet the adaptive tensioning and straightening requirements of the welding strip, but also avoid the breakage of the welding strip due to excessive clamping force. It has a flexible and reliable clamping effect, and takes into account both the stability of clamping and the protection of the welding strip.

[0029] 4. The solar cell assembly string welding method of the present invention tensions and straightens the welding strip during the traction process of the original string welding machine, and only slows down the lifting mechanism to form a speed difference, which not only has a good guiding effect but also does not affect the production rhythm. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 The accompanying drawing is a structural schematic diagram of step S1 of the solar cell assembly series welding method provided by the present invention;

[0032] Figure 2 The accompanying drawing is a structural schematic diagram of the initial action of step S2 of the solar cell assembly string welding method provided by the present invention;

[0033] Figure 3 The accompanying drawing is a structural schematic diagram of the process actions of step S2 of the solar cell assembly string welding method provided by the present invention;

[0034] Figure 4 The accompanying drawing is a structural schematic diagram of step S3 of the solar cell assembly series welding method provided by the present invention;

[0035] Figure 5 The accompanying drawing is a top view of the lifting plate provided by the present invention;

[0036] Figure 6 The accompanying drawing is a side view of the clamping portion of the lifting plate provided by the present invention in an unclamped state;

[0037] Figure 7 The accompanying drawing is a side view of the clamping state of the clamping part of the lifting plate provided by the present invention.

[0038] in:

[0039] 1- Cutting mechanism;

[0040] 2-Welding position;

[0041] 3- traction mechanism;

[0042] 31-first track; 32-first bracket; 33-traction manipulator;

[0043] 4- Lifting mechanism;

[0044] 41-second track; 42-second bracket; 43-cylinder; 44-lifting plate; 441-positioning groove; 442-bell mouth structure; 45-clamping part; 451-air bag; 452-guide block; 453-support block;

[0045] 5- Soldering strip. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The embodiment of the present invention discloses a solar cell assembly series welding method, comprising the following steps:

[0048] S1. See Appendix Figure 1 The welding strip 5 is pulled by the pulling mechanism 3, and at the same time, the lifting mechanism 4 moves upward to contact the welding strip 5. After the pulling mechanism 3 and the lifting mechanism 4 move at the same speed and in the same direction for a set distance, the cutting mechanism 1 cuts off the welding strip 5;

[0049] S2. See Appendix Figure 2 and 3 , using the lifting mechanism 4 to clamp the welding strip 5, controlling the running speed of the traction mechanism 3 to be greater than the running speed of the lifting mechanism 4, so that the lifting mechanism 4 forms a tensioning force on the welding strip 5 relative to the traction mechanism 3;

[0050] S3. See Appendix Figure 4When the traction mechanism 3 reaches the welding position 2, the lifting mechanism 4 releases the welding strip 5, completing one traction, and the traction mechanism 3 and the lifting mechanism 4 are reset to perform the next traction operation on the welding strip 5.

[0051] In this embodiment, when the lifting mechanism 4 releases the soldering ribbon 5 , the clamping point of the lifting mechanism 4 corresponds to the end of the soldering ribbon 5 .

[0052] In order to further optimize the above technical solution, the clamping point of the lifting mechanism 4 is located at one end of the lifting mechanism 4 away from the cutting mechanism 1 .

[0053] In order to further optimize the above technical solution, after the lifting mechanism 4 releases the welding strip 5, it first performs a downward movement in the vertical direction and then performs a linear resetting movement in the horizontal direction.

[0054] In order to realize the control of the above method, this embodiment provides a solar cell module string welding device that can meet the operation of the above method.

[0055] For details, see the attached Figure 1 To Attachment Figure 5 , a solar cell assembly string welding device, comprising a traction mechanism 3 and a lifting mechanism 4 operating between a cutting mechanism 1 and a welding position 2;

[0056] The traction mechanism 3 includes a first bracket 32 ​​that reciprocates on a first track 31, and a traction manipulator 33 installed on the first bracket 32;

[0057] The lifting mechanism 4 includes a second bracket 42 that reciprocates on a second track 41, a cylinder 43 is fixed on the second bracket 42, the telescopic rod of the cylinder 43 is upward, and a lifting plate 44 is fixed to the upward end of the telescopic rod, and a plurality of positioning grooves 441 corresponding to the welding strip 5 are provided on the lifting plate 44, and a clamping portion 45 is provided at the end of the positioning groove 441 away from the cutting mechanism 1.

[0058] See attached Figure 6 The clamping portion 45 includes air bags 451 arranged on both side walls of the lower part of the positioning groove 441 , and an air pipe is connected to the second bracket 42 , and a joint of the air pipe is connected to the air bag 451 .

[0059] In order to further optimize the above technical solution, when the telescopic rod of the cylinder 43 moves upward to the right position, the airbag 451 is inflated; when the lifting mechanism 4 moves close to the welding position 2, the airbag 451 is deflated and contracted.

[0060] In order to further optimize the above technical solution, corresponding guide blocks 452 are fixed to the two side walls of the positioning groove 441 away from one end of the cutting mechanism 1. The corresponding surfaces of the two guide blocks 452 are inclined at the upper part and vertical at the lower part, so that the two guide blocks 452 form a trumpet shape that is wide at the top and narrow at the bottom. The two guide blocks 452 are respectively located above the two air bags 451.

[0061] In order to further optimize the above technical solution, a support block 453 is fixed to the bottom wall of the positioning groove 441 at one end away from the cutting mechanism 1 , and the support block 453 is located below the two air bags 451 .

[0062] In order to further optimize the above technical solution, one end of the positioning groove 441 close to the cutting mechanism 1 is a bell-mouth structure 442 .

[0063] In this embodiment, the specific steps of a pulling operation are as follows:

[0064] ① Initially, the lifting mechanism 4 is close to the cutting mechanism 1, and the telescopic rod of the cylinder 43 is retracted. When the traction manipulator 33 pulls the welding strip 5 on the cutting mechanism 1, it first moves in a direction away from the cutting mechanism 1.

[0065] ② When the traction manipulator 33 passes over the top of the lifting mechanism 4 and is sensed by the sensor of the lifting mechanism 4, the telescopic rod of the cylinder 43 moves upward, driving the lifting plate 44 to move upward until the welding strip 5 passes over the guide of the two guide blocks 452 and enters the space enclosed by the two guide blocks 452, the two air bags 451 and the support block 453, and the telescopic rod of the cylinder 43 stops moving.

[0066] ③ After the traction mechanism 3 and the lifting mechanism 4 move at the same speed and in the same direction for a set distance, the cutting mechanism 1 cuts off the welding strip 5 and simultaneously activates the airbag 451, causing the airbag 451 to expand and clamp the welding strip 5. Figure 7 shown.

[0067] ④ Then the lifting mechanism 4 is decelerated to form a speed difference between the traction mechanism 3 and the lifting mechanism 4, so that the lifting mechanism 4 forms a tension force on the welding strip 5 relative to the traction mechanism 3. Continue this state and continue to move towards the welding position 2.

[0068] ⑤ When the traction mechanism 3 reaches the welding position 2, the clamping point formed by the airbag 451 of the lifting mechanism 4 corresponds to the end of the welding strip 5, and the lifting mechanism 4 releases the welding strip 5 to complete one traction.

[0069] ⑥ After the lifting mechanism 4 releases the welding belt 5, it first performs a downward movement in the vertical direction, and then performs a linear reset movement in the horizontal direction.

[0070] For the structure of a single traction mechanism 3, the traction mechanism 3 is reset together with the lifting mechanism 4 to perform the next traction operation. For the existing structure of two traction mechanisms 3, the operations can be performed alternately. This is a conventional structure in the prior art and will not be described in detail here.

[0071] To facilitate operation and replacement, the airbag 451 can be pasted on the inner wall of the positioning groove 441. Since the airbag 451 does not clamp the welding strip 5 rigidly, only a slight friction force is required. Therefore, the airbag 451 can be made of conventional wear-resistant rubber material, and its wear loss is relatively low.

[0072] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0073] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for string welding of solar cell modules, characterized in that: It includes a traction mechanism (3) and a lifting mechanism (4) operating between the cutting mechanism (1) and the welding position (2); The traction mechanism (3) comprises a first bracket (32) that reciprocates on a first track (31), and a traction manipulator (33) mounted on the first bracket (32); The lifting mechanism (4) comprises a second bracket (42) which reciprocates on a second track (41), a cylinder (43) being fixed on the second bracket (42), a telescopic rod of the cylinder (43) facing upward, and a lifting plate (44) being fixed to the upward end of the telescopic rod, the lifting plate (44) being provided with a plurality of positioning grooves (441) corresponding to the welding strips (5), and a clamping portion (45) being provided at one end of the positioning groove (441) away from the cutting mechanism (1); The clamping portion (45) comprises air bags (451) arranged on both side walls of the lower part of the positioning groove (441); an air pipe is connected to the second bracket (42); a joint of the air pipe is connected to the air bag (451); When the telescopic rod of the cylinder (43) moves upward to the correct position, the airbag (451) is inflated; when the lifting mechanism (4) moves close to the welding position (2), the airbag (451) is deflated and contracted; The two side walls of the positioning groove (441) away from one end of the cutting mechanism (1) are fixed with corresponding guide blocks (452); the corresponding surfaces of the two guide blocks (452) are inclined surfaces at the upper part and vertical surfaces at the lower part, so that the two guide blocks (452) form a trumpet shape that is wide at the top and narrow at the bottom; the two guide blocks (452) are respectively located above the two air bags (451); A support block (453) is fixed to the bottom wall of the positioning groove (441) at one end away from the cutting mechanism (1), and the support block (453) is located below the two air bags (451); The specific steps include: ① Initially, the lifting mechanism (4) is close to the cutting mechanism (1), and the telescopic rod of the cylinder (43) is retracted. When the pulling manipulator (33) pulls the welding strip (5) on the cutting mechanism (1), it first moves in a direction away from the cutting mechanism (1); ② When the traction manipulator (33) passes over the top of the lifting mechanism (4) and is sensed by the sensor of the lifting mechanism (4), the telescopic rod of the cylinder (43) moves upward, driving the lifting plate (44) to move upward until the welding strip (5) passes over the guides of the two guide blocks (452) and enters the space enclosed by the two guide blocks (452), the two air bags (451) and the support block (453), and then the telescopic rod of the cylinder (43) stops moving; ③ After the traction mechanism (3) and the lifting mechanism (4) move at the same speed and in the same direction for a set distance, the cutting mechanism (1) cuts the welding strip (5) and simultaneously activates the airbag (451), causing the airbag (451) to expand and clamp the welding strip (5); ④ Then, the lifting mechanism (4) is decelerated, so that a speed difference is formed between the traction mechanism (3) and the lifting mechanism (4), so that the lifting mechanism (4) forms a tensioning force on the welding strip (5) relative to the traction mechanism (3), and continues to move in the direction of the welding position (2) in this state; ⑤ When the traction mechanism (3) reaches the welding position (2), the clamping point formed by the airbag (451) of the lifting mechanism (4) corresponds to the end of the welding strip (5), and the lifting mechanism (4) releases the welding strip (5), completing one traction; ⑥ After the lifting mechanism (4) releases the welding strip (5), it first moves downward in the vertical direction, and then performs a linear reset action in the horizontal direction; The clamping point of the lifting mechanism (4) is located at an end of the lifting mechanism (4) away from the cutting mechanism (1).

2. A solar cell assembly string welding method according to claim 1, characterized in that: One end of the positioning groove (441) close to the cutting mechanism (1) is a bell-mouth structure (442).

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