Solder strip welding apparatus

Abstract

The application relates to a welding strip welding device for welding a welding strip to a solar cell, and comprising a support and a fixing member. The support has a support surface which is at least partially a convex curved surface. The fixing member is arranged on the support and is configured to fix the solar cell on the support surface so that the solar cell is bent towards the side of the support surface. The welding strip welding device can use the fixing member to fix the solar cell on the support surface in a form that the electrode surface of the solar cell faces away from the support surface and makes the solar cell into a corresponding bent shape. Then, the welding strip is welded towards the electrode surface of the solar cell. After the welding, due to the difference in the expansion coefficient between the welding strip and the solar cell, the two have a tendency to bend towards the electrode surface. The bending tendency after the welding and the bending caused by the fixing of the solar cell before the welding at least partially offset each other, so that the warping of the solar cell caused by the welding is reduced.

Description

Technical Field

[0001] This application relates to the field of solar cell technology, and in particular to a strip welding device. Background Technology

[0002] Improving the conversion efficiency of photovoltaic cells remains an important issue in the photovoltaic field, and BC type cells have attracted attention because they can significantly improve cell conversion efficiency.

[0003] However, compared with traditional photovoltaic cells, BC type cells are only welded on one side during module manufacturing. Due to the difference in thermal expansion coefficients between the cell and the solder strip, residual stress will exist after welding. This leads to severe warping of BC type cells after welding, and subsequent processes are prone to causing cell cracking. Utility Model Content

[0004] Therefore, it is necessary to provide a welding strip equipment that reduces warping after welding of BC type batteries to address the above problems.

[0005] A strip welding apparatus for welding strips to solar cells, the strip welding apparatus comprising:

[0006] A support member having a support surface, wherein at least a portion of the support surface is a convex curved surface; and

[0007] A fastener is provided on the support member; the fastener is configured to fix the solar cell on the support surface, such that the solar cell located on the support surface bends toward one side of the support surface.

[0008] In one embodiment, the supporting surface is a cylindrical surface.

[0009] In one embodiment, the fixing element is a vacuum adsorption element.

[0010] In one embodiment, the support member is configured to be movable, and the support surface has spaced-apart loading and unloading positions along the movement path of the support member.

[0011] In one embodiment, the support surface further has a welding position on the movement path of the support member, the welding position being located between the loading position and the unloading position;

[0012] The welding equipment for welding strips also includes a welding heating device, which is located at the welding position.

[0013] In one embodiment, the welding strip equipment further includes a welding strip unwinding device;

[0014] In the direction in which the support surface moves from the loading position to the unloading position, the welding strip unwinding device is located upstream of the welding heating device and is configured to release the welding strip to the support surface.

[0015] In one embodiment, the support member is a roller and is configured to rotate about its own axis, with the peripheral side of the roller forming the support surface.

[0016] In one embodiment, the welding strip equipment further includes a feeding mechanism and a discharging mechanism;

[0017] The feeding mechanism is located at the feeding position and is used to feed material onto the support surface located at the feeding position; the unloading mechanism is located at the unloading position and is used to unload material onto the support surface located at the unloading position.

[0018] In one embodiment, the feeding mechanism is a feeding conveyor belt, located below the roller;

[0019] And / or, the feeding mechanism is a feeding conveyor belt, the feeding conveyor belt having a feeding end; the feeding end is connected to the roller, and the angle α between the tangent of the roller at the connection point and the plane containing the conveying surface of the feeding conveyor belt is an obtuse angle.

[0020] In one embodiment, the welding strip equipment further includes a heating element disposed on the support and configured to heat the support surface.

[0021] The aforementioned ribbon welding equipment can fix solar cells onto a convex curved support surface with the electrode side facing away from the support surface using fasteners, thus giving the solar cells a corresponding curved shape. Then, the ribbon is welded towards the electrode side of the solar cell. After welding, due to the difference in the coefficients of thermal expansion between the ribbon and the solar cell, both tend to bend towards the electrode surface. This post-weld bending tendency at least partially cancels out the bending that occurs when the solar cell is fixed before welding. In other words, the pre-formed bending of the solar cell absorbs the difference in thermal expansion between the solar cell and the ribbon, reducing the warpage of the solar cell caused by welding. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a schematic diagram of the structure of the welding equipment for welding ribbons to solar cells in one embodiment of this application.

[0024] Figure 2 for Figure 1 The diagram shows the structure of the solar cell obtained after welding the welding strip using the welding equipment shown.

[0025] Figure 3 This is a schematic flowchart of a welding strip method in one embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 100, welding equipment for welding strips; 10, support component; 11, support surface; 20, welding heating device; 30, welding strip unwinding device; 40, feeding mechanism; 50, unloading mechanism; 200, solar cell; 201, N-zone electrode; 202, P-zone electrode; 300, welding strip; 301, welding strip segment; 303, cut-off area. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the term "and / or" appears, it merely describes the relationship between related objects and indicates that three relationships can exist. For example, A and / or B can represent the relationship between A and B: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates an "or" relationship between the related objects before and after it. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, four, five, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] As described in the background section, in related technologies, the solar cell is in a flat state during welding. After welding, due to the significant difference in thermal expansion coefficients between the solder ribbon 300 and the solar cell, there is substantial residual stress. Furthermore, BC-type solar cells are welded on one side only, with the solder ribbon 300 distributed on the same side, resulting in stress concentration on that single surface. The residual stress from the solder ribbon 300 has a more significant impact, leading to severe bending of the solar cell and increasing the risk of cracking during subsequent transfer and lamination. This solution addresses this by placing the BS-type solar cell in a bent state towards the non-welded side during welding, allowing it to return to a flat state after welding under the residual stress of the solder ribbon 300.

[0034] Please see Figure 1 and Figure 2 To address the aforementioned problems, one embodiment of this application provides a welding strip 300 for welding welding strips 300 to a solar cell 200, and includes a support member 10 and a fixing member (not shown). The support member 10 has a support surface 11, and the support surface 11 is at least partially convex. The fixing member is disposed on the support member 10. The fixing member is configured to fix the solar cell 200 to the support surface 11, causing the solar cell 200 located on the support surface 11 to bend toward the support surface 11.

[0035] Understandably, the support surface 11 can be entirely convex or only partially convex, as long as it satisfies the requirement that the solar cell 200, when fixed to the support surface 11, can bend towards one side of the support surface 11. The solar cell 200 has at least one electrode surface with electrodes. In one embodiment, the solar cell 200 is a BC-type cell, with its back side being the electrode surface, on which grid lines are printed.

[0036] For proper welding, when using the welding ribbon welding equipment 100, the solar cell 200 to be welded (300mm) must be fixed to the support surface 11 with its electrode surface facing away from the support surface 11. In other words, the electrode surface faces away from the support surface 11 so that the welding ribbon 300 can be welded onto it. After the solar cell 200 is bent towards the support surface 11 by the fixing device, the electrode surface facing away from the support surface 11 is correspondingly formed into a convex curved surface.

[0037] The coefficient of thermal expansion of the solder ribbon 300 is greater than that of the solar cell 200. Specifically, the solder ribbon 300 is made of metal. During the welding process, the length of the solder ribbon 300 increases more significantly. Correspondingly, the shrinkage of the solder ribbon 300 is greater after welding.

[0038] The aforementioned ribbon welding equipment 100 can fix the solar cell 200 onto the convex curved support surface 11 with the electrode surface facing away from the support surface 11 using a fixing member, and make it into a corresponding curved shape. Then, the ribbon 300 is welded towards the electrode surface of the solar cell 200. After welding, due to the difference in the coefficient of thermal expansion between the ribbon 300 and the solar cell 200, both tend to bend towards the electrode surface. This bending tendency after welding at least partially cancels out the bending generated by fixing the solar cell 200 before welding. That is, the pre-formed bending of the solar cell 200 absorbs the difference in thermal expansion between the solar cell 200 and the ribbon 300, thereby reducing the warpage of the solar cell 200 caused by welding.

[0039] In some embodiments, the support surface 11 is a cylindrical surface.

[0040] In essence, a cylindrical surface is a surface formed by moving a straight line parallel to a fixed curve; that is, a surface formed by moving a moving straight line parallel to a fixed curve. The moving straight line is called the generatrix of the cylindrical surface, and the fixed curve is called the directrix of the cylindrical surface. The directrix can be a closed curve or a non-closed curve segment, and specifically, it can be, but is not limited to, a circle or a part of a circle.

[0041] When welding the welding strip 300, the long strip 300 can be welded to the electrode surface in the form of a straight generatrix perpendicular to the cylindrical surface in the longitudinal direction.

[0042] Thus, the solar cell 200 fixed on the support surface 11 can be bent into a cylindrical shape, which is more suitable for welding the long strip of welding strip 300.

[0043] In other embodiments, the support surface 11 may also be a convex surface of other shapes, such as a sphere, a cone, an irregular surface, etc. It can be selected according to the shape of the solder strip 300 and the arrangement of the solder strip 300, and no specific limitation is made here.

[0044] In some embodiments, the fastener is a vacuum adsorption element.

[0045] Understandably, the vacuum adsorption component is provided on the support 10 and can form a vacuum on the support surface 11 so as to adsorb the solar cell 200, fix it on the support surface 11 and make it conform to the support surface 11 to form a bend.

[0046] Specifically, the vacuum adsorption component has an air intake port, which is located on or below the support surface 11 and is connected to the surface of the support surface 11. Adsorption of a single solar cell 200 can be achieved through multiple air intake ports, which are correspondingly distributed at various locations on the support surface 11; alternatively, adsorption of a single solar cell 200 can be achieved through a single air intake port, which can cover the entire solar cell 200.

[0047] In this way, the welding equipment 100 can use a vacuum adsorption component to fix the solar cell 200 to the support surface 11, without affecting the welding due to obstruction of the electrode surface of the solar cell 200. In addition, the vacuum adsorption method can also reduce the probability of mechanical scratches, and the vacuum adsorption component can directly adsorb the solar cell 200 to the support surface 11 for loading, and then use vacuum breaking to unload.

[0048] In other embodiments, the fixing member can also be a clamp, a magnetic member, etc., as long as it can fix the solar cell 200 to the support surface 11 and bend the solar cell 200 toward the support surface 11. No specific limitation is made here.

[0049] In some embodiments, the support member 10 is configured to be movable, and the support surface 11 has spaced-apart loading and unloading positions along the movement path of the support member 10.

[0050] Understandably, the movement of the support member 10 can be, but is not limited to, rotation, movement, rolling, oscillation, or a combination of these movements, as long as it enables the support surface 11 to move back and forth between the loading position and the unloading position.

[0051] The loading position is used for loading onto the support surface 11, and the unloading position is used for unloading from the support surface 11. The solar cells 200 on the support surface 11 are welded between the loading position and the unloading position. The fastener is configured to at least secure the solar cells 200 to the support surface 11 located between the loading position and the unloading position.

[0052] In this way, the support 10 can be used as part of the production line to sequentially realize feeding, welding of the strip 300 and unloading on the support surface 11 through the motion pair. At the same time as welding, the transmission of the solar cell 200 is completed, so that the welding equipment 100 can work continuously and continuously output the solar cell 200 with the welding strip 300 completed.

[0053] In some embodiments, the support surface 11 also has a welding position on the movement path of the support member 10, and the welding position is located between the loading position and the unloading position.

[0054] The welding equipment 100 also includes a welding heating device 20, which is located at the welding position.

[0055] Understandably, the welding heating device 20 is located above the support surface 11 at the welding position, and is able to heat the solar cell 200 and the welding strip 300 on the support surface 11 so that the two are welded.

[0056] In this way, the welding equipment 100 can directly heat the support surface 11 that has moved to the welding position using the welding heating device 20, so that the solar cell 200 on it can be welded to the welding strip 300.

[0057] In some embodiments, the welding strip equipment 100 further includes a heating element (not shown), which is disposed on the support 10 and configured to heat the support surface 11.

[0058] The heating element can be located below the support surface 11 or on the surface of the support surface 11, and can also heat the solar cell 200 and the solder ribbon 300 located on the support surface 11. Specifically, the heating element can be, but is not limited to, a heating film, a heating wire, etc., and is not specifically limited here.

[0059] In this way, the heating element can heat the solar cell 200 and the welding strip 300 from below, playing an auxiliary heating role and helping to improve the welding performance of the welding strip welding equipment 100.

[0060] In some embodiments, the welding strip equipment 100 further includes a welding strip unwinding device 30. The welding strip unwinding device 30 is located upstream of the welding heating device 20 in the direction in which the support surface 11 moves from the loading position to the unloading position, and is configured to release the welding strip 300 onto the support surface 11.

[0061] Understandably, the solder ribbon 300 released by the solder ribbon unwinding device 30 is released onto the electrode surface of the solar cell 200 on the support surface 11 and comes into contact with the welding position on the electrode surface. The solar cell 200 on the support surface 11 first receives the solder ribbon 300 released by the solder ribbon unwinding device 30 and then reaches the welding position for welding; or, the solar cell 200 on the support surface 11 simultaneously receives the solder ribbon 300 released by the solder ribbon unwinding device 30 and performs welding when it reaches the welding position.

[0062] Furthermore, the solder strip unwinding device 30 may include multiple release sections, each of which can release the solder strip 300, and all release sections may be arranged in parallel. The solder strip 300 of each release section may be released independently, or the solder strips 300 of different release sections may be released together.

[0063] In this way, the welding strip equipment 100 can automatically release the welding strip 300 onto the electrode surface of the solar cell 200 using the welding strip unwinding device 30, and achieve continuous welding of the solar cell 200 and the welding strip 300 in conjunction with the moving support member 10.

[0064] In some embodiments, the support 10 is a roller and is configured to rotate about its own axis, with the peripheral side of the roller forming a support surface 11.

[0065] Understandably, in the direction of rotation, the support surface 11 has a loading position, a welding position, and a unloading position. When rotating to the loading position, the solar cell 200 is loaded; when rotating to the welding position, the welding strip 300 is welded; and when rotating to the unloading position, the solar cell 200 is unloaded.

[0066] Specifically, the support surface 11 located at the loading position, the unloading position, and between the loading and unloading positions can fix at least three solar cells 200, so that one is in the loading position, one is in the welding position, and the other is in the unloading position.

[0067] Thus, during the rotation of the drum, the support surface 11 can continuously cycle between the feeding position, the welding position, and the unloading position, thereby realizing the feeding, welding, and unloading of the solar cells 200. The welding strip welding equipment 100 can obtain a battery string formed by multiple solar cells 200 connected in series through continuous welding.

[0068] In some embodiments, the welding strip equipment 100 further includes a feeding mechanism 40 and a discharging mechanism 50. The feeding mechanism 40 is located at the feeding position and is used to feed the support surface 11 located at the feeding position; the discharging mechanism 50 is located at the discharging position and is used to discharge the support surface 11 located at the discharging position.

[0069] Thus, the welding strip equipment 100 is specially equipped with a feeding mechanism 40 and a discharging mechanism 50 to realize the feeding and discharging of solar cell wafers 200, so that the welding strip equipment 100 can form a production line that can work continuously, which helps to improve production efficiency.

[0070] In some embodiments, the feeding mechanism 40 is a feeding conveyor belt and is located below the roller. Understandably, the conveying speed of the feeding conveyor belt is the same as the rotational linear speed of the roller.

[0071] In this way, the solar cells 200 can be laid on the feeding conveyor belt with their electrode surfaces facing down. When the roller rotates to its lowest position, the support surface 11 can pick up the solar cells 200 from the feeding conveyor belt and fix them with fasteners, thus achieving feeding. Among them, the electrode surfaces of the picked-up solar cells 200 naturally face away from the support surface 11 of the roller.

[0072] Specifically, the fixing component is a vacuum adsorption component. When rotated to the lower position, the support surface 11 can directly adsorb the surface of the solar cell opposite to the electrode surface through the vacuum adsorption component, and fix the solar cell 200 on the support surface 11 with the electrode surface facing away from the support surface 11, thus maintaining the fixation of the solar cell 200 before reaching the unloading position.

[0073] In some embodiments, the feeding mechanism 50 is a feeding conveyor belt, which has a feeding end. The feeding end is connected to a roller, and the angle α between the tangent plane of the roller at the connection point and the plane containing the conveying surface of the feeding conveyor belt (e.g., ...) is equal to the angle between the tangent plane of the roller at the connection point and the plane containing the conveying surface of the feeding conveyor belt. Figure 1 (As shown) is an obtuse angle. Understandably, the conveyor belt's transmission speed is the same as the roller's rotational linear speed.

[0074] In this way, when the roller rotates to the unloading position, the support surface 11 can smoothly transmit the solar cell 200 on it from the feeding end to the unloading conveyor belt, thus realizing unloading.

[0075] Specifically, the fixing component is a vacuum adsorption component, which can break the vacuum on the solar cell 200 on the support surface 11 when it rotates to the unloading position, thereby eliminating its fixing effect. At this time, the solar cell 200 can be naturally conveyed to the unloading conveyor belt by the rolling rotation, realizing the transfer and transportation.

[0076] Please refer to the following: Figure 3 This application also provides a method for welding strips, which can be achieved using the aforementioned welding strip welding equipment 100. The welding strip welding method includes:

[0077] S200: The solar cell 200 is fixed on the support surface 11 of the welding equipment 100 using the fixing parts of the welding equipment 100, and the electrode surface of the solar cell 200 is made to face away from the support surface 11, and the solar cell 200 is bent toward the support surface 11.

[0078] S400, weld the solder strip 300 to the electrode surface of the solar cell 200.

[0079] The above-described welding method for solder strips allows the solar cell 200 to be fixed to the convex curved support surface 11 with its electrode surface facing away from the support surface 11 using a fastener, thus giving it a corresponding curved shape. Then, the solder strip 300 is soldered towards the electrode surface of the solar cell 200. After welding, due to the difference in the coefficients of thermal expansion between the solder strip 300 and the solar cell 200, both tend to bend towards the electrode surface. This bending tendency after welding at least partially cancels out the bending of the solar cell 200 before welding, meaning that the pre-formed bending of the solar cell 200 absorbs the difference in thermal expansion between the solar cell 200 and the solder strip 300, reducing the warpage of the solar cell 200 caused by welding.

[0080] In some embodiments, the electrode surface of the solar cell 200 is provided with a P-region electrode 202 and an N-region electrode 201. In the first direction (e.g. Figure 2 In the X direction shown, P-region electrode 202 and N-region electrode 201 are alternately arranged, with P-region electrode 202 and N-region electrode 201 at each end.

[0081] Before the step of fixing the solar cell 200 to the support surface 11 of the welding equipment 100 using the fixing components of the welding equipment 100, and before bending the solar cell 200 towards the support surface 11 with the electrode surface of the solar cell 200 facing away from the support surface 11, i.e. before step S200, the method further includes:

[0082] At least two solar cells 200 are sequentially fed onto the support surface 11 along a second direction perpendicular to the first direction, and adjacent solar cells 200 are arranged opposite to each other in the first direction.

[0083] Understandably, multiple solar cells 200 are arranged along a second direction (e.g., Figure 2 The solar cells 200 are arranged sequentially in the Y direction (as shown), and adjacent solar cells 200 are opposite in the first direction. In other words, after placing one solar cell 200, another solar cell 200 is placed upstream of it at an angle of 180°.

[0084] Specifically, when placing solar cells 200 on the feeding conveyor belt, the first direction of the solar cells 200 should be arranged perpendicular to the transmission direction of the feeding conveyor belt, and the placement angles of adjacent solar cells 200 should differ by 180°.

[0085] Thus, during subsequent continuous welding of the solder strip 300, the solder strip 300 can directly connect the P-region electrode 202 and the N-region electrode 201 of the adjacent solar cell 200.

[0086] In some embodiments, after the step of welding the solder strip 300 to the electrode surface of the solar cell 200 on the support surface 11, i.e. after step S200, the method further includes:

[0087] The solder ribbon 300 soldered onto the solar cell 200 is cut into solder ribbon segments 301, and the solder ribbon segments 301 connect the P-region electrode 202 and the N-region electrode 201 on two adjacent solar cells 200.

[0088] Understandably, the solder ribbon 300 is continuously released using the solder ribbon unwinding device 30, and then welded to the electrode surface of the solar cell 200 using the welding heating device 20. The continuous solder ribbon 300 is then cut after welding to ensure that each cut solder ribbon segment 301 connects only the P-region electrode 202 and N-region electrode 201 of two adjacent solar cells 200. After cutting, the originally continuous solder ribbon 300 forms multiple solder ribbon segments 301, and adjacent solder ribbon segments 301 are separated by a cut-off region 303, which insulates the originally connected solder ribbon segments 301 from each other.

[0089] Furthermore, depending on the number of P-region electrodes 202 and N-region electrodes 201 on the electrode surface, multiple solder strips 300 can be simultaneously welded to the solar cell 200 in the first direction, and the solder strip segments 301 formed after the adjacent two solder strips 300 are cut off are staggered to each other so that multiple solar cells 200 are connected in series to form a battery string.

[0090] In this way, the welding strip 300 can be continuously released and subsequently cut in areas requiring insulation, which helps to reduce the difficulty of welding and improve welding efficiency.

[0091] In some other embodiments, the solder ribbon 300 may be pre-cut into solder ribbon segments 301, and then the solder ribbon segments 301 may be soldered to the electrode surface of the solar cell 200.

[0092] To facilitate understanding of the welding strip welding equipment 100 and welding strip welding method of this application, a specific application example is provided below. In this specific application example, the use of the welding strip welding equipment 100 and the welding strip welding method of this application include the following steps:

[0093] 1. Place the BC class battery cells with the electrode side printed with grid lines facing down, and follow the instructions... Figure 2 The cells are arranged in the form shown, with the P-region electrode 202 and N-region electrode 201 of adjacent cells placed alternately. This can be achieved by rotating the BC-type cells by 180 degrees.

[0094] 2. The arranged battery cells are sequentially transported to the area below the roller by the feeding conveyor belt.

[0095] 3. The rotation speed of the roller is the same as the transmission speed of the feeding conveyor belt to ensure the relative position of the battery cells; the battery cells are adsorbed onto the surface of the roller (i.e., support surface 11) by the vacuum adsorption component, and the battery cells are in a state of slight bending towards the side without electrodes.

[0096] 4. As the drum rotates, the welding strip unwinding device 30 releases the welding strip 300, which then contacts the bent battery at the welding position.

[0097] 5. The welding strip 300 is welded to the battery cell by the welding heating device 20. During the welding process, the heating element on the roller also has a heating function, and the heating is determined according to the welding requirements.

[0098] 6. After welding is completed, the battery string is transported to the corresponding position by the unloading conveyor belt. Since the welding strip 300 is a whole strip of welding strip 300 that has not been cut before welding, the welding strip 300 is cut off in the area that needs to be insulated after welding.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A welding strip welding device for welding welding strips (300) to solar cell wafers (200), characterized in that, The welding equipment for welding strips includes: The support member (10) has a support surface (11), and the support surface (11) is at least partially convex; and A fastener is provided on the support member (10); the fastener is configured to fix the solar cell (200) on the support surface (11) such that the solar cell (200) located on the support surface (11) bends toward the support surface (11).

2. The welding strip equipment according to claim 1, characterized in that, The supporting surface (11) is a cylindrical surface.

3. The welding strip equipment according to claim 1, characterized in that, The fixing component is a vacuum adsorption component.

4. The welding strip equipment according to any one of claims 1-3, characterized in that, The support member (10) is configured to be movable, and the support surface (11) has spaced-apart loading and unloading positions along the movement path of the support member (10).

5. The welding strip equipment according to claim 4, characterized in that, On the movement path of the support member (10), the support surface (11) also has a welding position, which is located between the loading position and the unloading position; The welding equipment for welding strips also includes a welding heating device (20), which is located at the welding position.

6. The welding strip equipment according to claim 5, characterized in that, The welding equipment for welding strips also includes a welding strip unwinding device (30); In the direction in which the support surface (11) moves from the loading position to the unloading position, the welding strip unwinding device (30) is located upstream of the welding heating device (20) and is configured to release the welding strip (300) to the support surface (11).

7. The welding strip equipment according to claim 4, characterized in that, The support member (10) is a roller and is configured to rotate about its own axis, with the peripheral side of the roller forming the support surface (11).

8. The welding equipment for welding strips according to claim 7, characterized in that, The welding strip welding equipment also includes a feeding mechanism (40) and a discharging mechanism (50). The feeding mechanism (40) is located at the feeding position and is used to feed the material onto the support surface (11) located at the feeding position; the unloading mechanism (50) is located at the unloading position and is used to unload the material onto the support surface (11) located at the unloading position.

9. The welding equipment for welding strips according to claim 8, characterized in that, The feeding mechanism (40) is a feeding conveyor belt and is located below the roller; And / or, the feeding mechanism (50) is a feeding conveyor belt, the feeding conveyor belt having a feeding end; the feeding end is connected to the roller, and the angle α between the tangent of the roller at the connection point and the plane containing the conveying surface of the feeding conveyor belt is an obtuse angle.

10. The welding strip equipment according to claim 1, characterized in that, The welding strip equipment further includes a heating element disposed on the support (10) and configured to heat the support surface (11).

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