Solar cell welding device and solar cell production system

Abstract

The utility model relates to a solar cell welding device and a solar cell production system. The solar cell welding device comprises a supporting base and a hot pressing assembly. The hot-pressing assembly is arranged on the supporting seat and comprises a lifting mechanism arranged on the supporting seat and an electric heating pressing head connected with the lifting mechanism, and the lifting mechanism is used for driving the electric heating pressing head to ascend and descend so that the electric heating pressing head can move downwards to press the welding strip. And when the electric heating pressing head presses the welding strip, heat can be transferred to the welding strip, so that the welding strip is welded on a battery piece below the welding strip. The electric heating pressing head is pressed on the welding strip in advance to achieve preliminary fixing of the to-be-welded position of the welding strip, the insufficient welding defect caused by deviation in the welding process is effectively avoided, and therefore the joint is free of insufficient welding holes, the welding quality and the welding reliability can be improved, and the production efficiency can be improved. And the risk of smudginess to the battery piece caused by a dispensing mode in the related technology is avoided.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a solar cell welding device and a solar cell production system.

[0002] In related technologies, the solar cell manufacturing process includes the production of cell sheets, connecting the cells in series to form a cell string, and then stacking, laminating, and framing. The cell string process typically involves multiple solder ribbons (also called solder wires), which are arranged in sequence and fixed to multiple cell sheets.

[0003] The solder ribbon can be attached to the cell using laser or infrared welding, or it can be bonded to the cell using adhesives such as UV glue and hot melt adhesive. In laser welding, a light source is directed onto a reflector, which then reflects it to a beam expander. The beam expander expands and collimates the light before directing it to a galvanometer, flexibly controlling the beam's coordinates. A lens focuses the light onto the workpiece to be welded, directing a high-energy-density beam to the cell's welding area, causing localized heating to achieve welding. However, this approach has disadvantages such as high equipment cost, complex control, and the tendency of the solder ribbon to shift. Furthermore, infrared welding is subject to high thermal stress, making weld quality uncontrollable. Furthermore, in adhesive bonding, UV glue is typically dripped onto the cell's main grid and requires UV lamp curing, which not only increases costs but also affects production efficiency. The UV lamp shrinks during the curing process, affecting the solder ribbon's fixing accuracy. Furthermore, the glue dispense point may be too close to the pad, creating the risk of UV glue ignition during laser welding. Utility Model Content

[0004] Based on this, it is necessary to overcome the defects of the existing technology and provide a solar cell welding device and a solar cell production system, which can prevent the welding strip from offsetting and causing cold welding defects, improve welding quality and welding reliability, and have higher production efficiency.

[0005] A solar cell welding device, comprising:

[0006] support base; and

[0007] A hot pressing assembly is installed on the support seat, and the hot pressing assembly includes a lifting mechanism installed on the support seat and an electric thermal pressure head connected to the lifting mechanism. The lifting mechanism is used to drive the electric thermal pressure head to move up and down so that the electric thermal pressure head moves downward to press the welding ribbon; when the electric thermal pressure head presses the welding ribbon, it can transfer heat to the welding ribbon, so that the welding ribbon is welded to the battery cell located below the welding ribbon.

[0008] In one embodiment, the hot pressing assembly further includes a first beam; the electric hot pressing heads are multiple and are sequentially spaced apart on the first beam along the longitudinal direction of the first beam, and the lifting mechanism is connected to the first beam.

[0009] In one embodiment, the hot pressing assembly further includes at least one first guide member disposed between the first beam and the support seat.

[0010] In one embodiment, the hot pressing assembly further includes a plurality of elastic members, each of which is correspondingly disposed between each of the electric hot pressing heads and the first beam.

[0011] In one embodiment, each of the electric heating pressure heads is provided with a second guide member, which is movably provided on the first beam; the elastic member is a spring sleeved on the second guide member, and the opposite ends of the elastic member are respectively in contact with the first beam and the electric heating pressure head.

[0012] In one embodiment, the hot pressing assembly further includes a temperature sensor connected to the electric hot pressing head, and the temperature sensor is used to sense the temperature of the electric hot pressing head; the solar cell welding device further includes a controller, and the controller is connected to the temperature sensor, and the controller is used to control the power-on time and / or working power of the electric hot pressing head according to the temperature sensed by the temperature sensor.

[0013] In one embodiment, the number of the hot pressing assemblies is at least two and they are sequentially spaced apart and arranged on the support seat along the length direction of the welding strip.

[0014] In one embodiment, the solar cell welding device also includes a push-pull mechanism installed on the support seat, a first movable shaft connected to the push-pull mechanism, and a plurality of first clamping assemblies connected to the first movable shaft and arranged in sequence along the axial direction of the first movable shaft; the push-pull mechanism is used to drive the first movable shaft to move back and forth along its axial direction, and the movement of the first movable shaft can synchronously drive the opening or clamping action of each of the first clamping assemblies, and the clamping action of each of the first clamping assemblies can correspondingly clamp each of the welding strips on the battery cell.

[0015] In one embodiment, the solar cell welding device also includes a second movable shaft connected to the push-pull mechanism and a plurality of second clamping assemblies connected to the second movable shaft and arranged in sequence along the axial direction of the second movable shaft; the push-pull mechanism is also used to drive the second movable shaft to move back and forth along its axial direction, and when the second movable shaft moves, it can synchronously drive each of the second clamping assemblies to open or clamp, and when each of the second clamping assemblies clamps, it can correspondingly clamp each of the welding strips on the battery cell.

[0016] A solar cell production system comprises the solar cell welding device.

[0017] In the aforementioned solar cell welding device and solar cell production system, a lifting mechanism drives the electric heating head downward to compress the solder ribbon. When the electric heating head is energized, it transfers heat to the pressing area of ​​the solder ribbon. After the pressing area of ​​the solder ribbon is heated, the solder in this localized area melts, thereby achieving soldering and fixing the solder ribbon to the solar cell. Compared to welding or bonding methods in related arts, the electric heating head is pre-pressed against the solder ribbon to initially fix the solder ribbon in the intended soldering position, effectively preventing offset during the welding process that could lead to cold solder joint defects. This results in a joint with no cold solder holes, good metallization, and improved soldering quality. Furthermore, the point-to-point heating method in this embodiment does not cause additional thermal damage to the solar cell, has low requirements for the solder ribbon, and offers instantaneous localized heating, short heating time, and minimal thermal impact. This improves soldering reliability and avoids the energy loss associated with infrared welding in related arts. Furthermore, there are no tedious steps such as dispensing and curing during the gluing process, thereby improving production efficiency and eliminating the risk of contamination of the solar cell associated with dispensing methods in related arts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a working structure diagram of a solar cell welding device according to an embodiment of the present application.

[0019] Figure 2 for Figure 1 The structure diagram of the battery cell and welding ribbon is omitted in the structure shown.

[0020] Figure 3 for Figure 1 The structural diagram of the support base, the push-pull structure and the first clamping assembly is omitted in the structure shown.

[0021] Figure 4 for Figure 3 The structure diagram of the electric heating head in the structure shown is pressed tightly against the welding ribbon.

[0022] Figure 5 for Figure 1 The structural diagram of the support base and the hot pressing assembly is omitted in the structure shown.

[0023] Figure 6 for Figure 5 Structural diagram of the second clamping assembly clamping the welding strip in the structure shown.

[0024] 10. Support seat; 11. Bushing; 20. Hot pressing assembly; 21. Lifting mechanism; 22. Electric hot pressing head; 221. Second guide member; 23. First beam; 24. First guide member; 25. Elastic member; 26. Second beam; 30. Battery cell; 31. PAD point; 40. Welding ribbon; 50. Push-pull mechanism; 51. Push block; 61. First moving axis; 62. First clamping assembly; 621. First clamping arm; 622. Second clamping arm; 63. First sliding seat; 64. Third beam; 71. Second moving axis; 72. Second clamping assembly; 721. Third clamping arm; 7211. Second limiting groove; 722. Fourth clamping arm; 73. Second sliding seat; 74. Fourth beam. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] See Figures 1 to 3 , Figure 1 The working structure diagram of a solar cell welding device according to an embodiment of the present application is shown. Figure 2 Shown Figure 1 The structure diagram of the battery cell 30 and the welding ribbon 40 is omitted in the structure shown. Figure 3 Shown Figure 1 The structural diagram of the support base 10, the push-pull structure and the first clamping assembly 62 are omitted in the structure shown. An embodiment of the present application provides a solar cell welding device, which includes a support base 10 and a hot pressing assembly 20. The hot pressing assembly 20 is mounted on the support base 10, and the hot pressing assembly 20 includes a lifting mechanism 21 mounted on the support base 10 and an electric hot pressing head 22 connected to the lifting mechanism 21. The lifting mechanism 21 is used to drive the electric hot pressing head 22 to move up and down, so that the electric hot pressing head 22 moves downward to press the welding ribbon 40. When the electric hot pressing head 22 presses the welding ribbon 40, it can transfer heat to the welding ribbon 40, so that the welding ribbon 40 is welded to the battery cell 30 located below the welding ribbon 40.

[0027] In the aforementioned solar cell welding device, the lifting mechanism 21 drives the electric heating head 22 to move downward and compress the solder ribbon 40. When the electric heating head 22 is energized, it can transfer heat to the pressed portion of the solder ribbon 40. After the pressed portion of the solder ribbon 40 is heated, the solder in this local portion is melted by the heat, thereby achieving welding and fixing the solder ribbon 40 to the solar cell 30. Compared with the welding method or bonding method in the related art, the electric heating head 22 is pre-pressed on the solder ribbon 40 to achieve preliminary fixation of the solder ribbon 40 to be welded, effectively avoiding offset during the welding process that may cause cold solder defects, resulting in no cold solder holes in the joint and good metallization, which can improve the welding quality. In addition, the point-to-point heating method in this embodiment will not cause additional thermal damage to the battery cell 30, has low requirements for the soldering ribbon 40, has instantaneous local heating, short heating time, and small thermal impact, can improve welding reliability, and will not produce energy loss problems such as infrared welding in related technologies. Moreover, there are no tedious steps such as dispensing and curing in the gluing process, which can improve production efficiency and will not cause the risk of contamination to the battery cell 30 caused by the dispensing method in related technologies.

[0028] See also Figure 3 and Figure 4 In one embodiment, the hot pressing assembly 20 further includes a first crossbeam 23. There are multiple electric thermal pressing heads 22, which are arranged on the first crossbeam 23 in sequence along the longitudinal direction of the first crossbeam 23. The lifting mechanism 21 is connected to the first crossbeam 23. Specifically, each electric thermal pressing head 22 is arranged corresponding to each welding ribbon 40 on the battery cell 30. When the lifting mechanism 21 is in operation, it drives the first crossbeam 23 to move up and down, and the first crossbeam 23 simultaneously drives each electric thermal pressing head 22 to move up and down, so that each electric thermal pressing head 22 can be pressed against each welding ribbon 40 respectively, so that the synchronous welding of multiple welding ribbons 40 can be achieved, thereby improving the welding efficiency. After the welding of each welding ribbon 40 on the battery cell 30 is completed, the lifting mechanism 21 drives the first crossbeam 23 to rise, and synchronously drives each electric thermal pressing head 22 to separate from each welding ribbon 40.

[0029] It should be noted that the longitudinal direction of the first crossbeam 23 in this embodiment is as follows: Figure 3 The arrow m in the middle indicates the length direction of the battery cell 30 .

[0030] It should be noted that each electric heating head 22 can be powered on synchronously, for example, connected to a power supply in parallel. When each electric heating head 22 is pressed against each welding strip 40, the power supply is turned on synchronously under the control of the controller, thereby realizing the synchronous welding of each welding strip 40; or they can work independently. In this way, under the control of the controller, the welding of certain welding strips 40 can be selectively completed according to actual needs, making the welding flexibility greater.

[0031] In some embodiments, the lifting mechanism 21 includes but is not limited to various forms of power mechanisms such as a cylinder, a motor screw, a hydraulic cylinder, a cam mechanism, etc.

[0032] See also Figure 3 and Figure 4 In one embodiment, the hot pressing assembly 20 further includes at least one first guide member 24 disposed between the first crossbeam 23 and the support base 10. Thus, when the lifting mechanism 21 drives the first crossbeam 23 up and down, the first guide member 24 serves as a guide, thereby improving the lifting stability of the first crossbeam 23. This allows each electric hot pressing head 22 to accurately press against each soldering ribbon 40, thereby preventing soldering ribbon 40 deviation and causing cold soldering defects.

[0033] In some embodiments, the first guide member 24 includes, but is not limited to, a guide rod, a guide column, or a guide shaft. The first guide member 24 is, for example, fixedly connected to the first crossbeam 23. A first guide hole is formed in the support base 10 to accommodate the first guide member 24, and the first guide member 24 is movably inserted into the first guide hole. Specifically, the support base 10 is provided with a shaft sleeve 11, and the first guide hole is formed in the shaft sleeve 11.

[0034] Specifically, the number of the first guide member 24 is not limited to one, and can be two, three, or more. The number of the shaft sleeves 11 is correspondingly more than one, and can be two, three, or more. Each shaft sleeve 11 is provided correspondingly to each first guide member 24.

[0035] See also Figure 3 and Figure 4 In some embodiments, the hot pressing assembly 20 further includes, for example, a second beam 26 connected and fixed to each first guide member 24. The second beam 26 is spaced apart from the first beam 23. The lifting mechanism 21 is connected and fixed to the second beam 26, specifically, for example, to the middle portion of the second beam 26.

[0036] In one embodiment, the hot pressing assembly 20 further includes a plurality of elastic members 25. Each elastic member 25 is correspondingly disposed between each electric hot pressing head 22 and the first crossbeam 23. Thus, when the lifting mechanism 21 drives the first crossbeam 23 up and down, the elastic members 25 act as a buffer. Even if there are height deviations on the surfaces of the respective welding ribbons 40, each electric hot pressing head 22 can still be synchronously pressed and fixed to each welding ribbon 40, thereby improving the welding quality and efficiency of the battery cell 30.

[0037] In one embodiment, each electrothermal pressure head 22 is provided with a second guide member 221. The second guide member 221 is movably provided on the first crossbeam 23. The elastic member 25 is a spring sleeved on the second guide member 221, and the opposite ends of the elastic member 25 are respectively in contact with the first crossbeam 23 and the electrothermal pressure head 22. In this way, the second guide member 221 guides the movement of the electrothermal pressure head 22. In the process of pressing down the welding strip 40, the electrothermal pressure head 22 moves up and down along the guide direction of the second guide member 221, with high stability, so that each electrothermal pressure head 22 can be accurately pressed against each welding strip 40, thereby preventing the welding strip 40 from deviating and causing a cold soldering defect.

[0038] Specifically, a second guide hole corresponding to the position of the second guide member 221 is provided on the first crossbeam 23 , and the second guide member 221 can be movably inserted into the second guide hole.

[0039] In some embodiments, the "second guide member 221" can be "a part of the electrothermal pressure head 22", that is, the "second guide member 221" and the "other parts of the electrothermal pressure head 22" are integrally formed; it can also be an independent component that can be separated from the "other parts of the electrothermal pressure head 22", that is, the "second guide member 221" can be manufactured independently and then combined with the "other parts of the electrothermal pressure head 22" into a whole.

[0040] The shape of the solder and the welding temperature are highly adaptable, and the welding quality of the battery cell 30 can be improved by precisely controlling and flexibly adjusting the temperature of the electric heating head 22 .

[0041] In one embodiment, the hot pressing assembly 20 further includes a temperature sensor connected to the electric hot pressing head 22. The temperature sensor is configured to sense the temperature of the electric hot pressing head 22. The solar cell welding device further includes a controller connected to the temperature sensor and configured to control the power-on time and / or operating power of the electric hot pressing head 22 based on the temperature sensed by the temperature sensor.

[0042] Specifically, when the temperature sensed by the temperature sensor is too low, the controller controls the electric heating head 22 to increase the power-on time and / or increase the operating power, thereby increasing the temperature of the electric heating head 22 to meet the preset temperature range; conversely, when the temperature sensed by the temperature sensor is too high, the controller controls the electric heating head 22 to reduce the power-on time or even disconnect the power, and / or reduce the operating power, thereby reducing the temperature of the electric heating head 22 to meet the preset temperature range. In this way, by accurately controlling and adjusting the temperature, precise energy control can be achieved, improving the consistency and reliability of heating, and by controlling the process parameters, the thickness of the alloy layer can be controlled, improving the reliability of the solder joint.

[0043] It should be noted that the heating principle of the electrothermal head 22 is specifically, for example, a current heating method, that is, Q=I 2 Therefore, by adjusting the current I and / or the power-on time t, the heat generation Q can be adjusted accordingly. Of course, the electrothermal pressure head 22 can also adopt electromagnetic heating or other electric heating methods according to actual needs, which is not specifically limited here.

[0044] When current heating is employed, the electric heating head 22 may optionally include a heat conductor and a heating element disposed within the heat conductor. The heat conductor may include, but is not limited to, metal materials such as copper, aluminum, and their alloys. The heating element may include, but is not limited to, a resistance wire, an electric heating rod, and the like. The heating element is electrically connected to a power source via a wire. When the power source is on, the heating element generates heat, which in turn transfers the heat to the heat conductor, which in turn transfers the heat to the soldering ribbon 40, thereby raising the temperature of the soldering ribbon 40 to the soldering temperature.

[0045] In some specific embodiments, each electric heating head 22 is provided with a temperature sensor, so that the working temperature of each electric heating head 22 can be accurately controlled, precise energy control can be achieved, heating is stable, thermal damage to the battery cell 30 can be reduced, and cold soldering defects can be avoided, thereby improving the welding quality of the battery cell 30.

[0046] Optionally, the temperature sensor includes, but is not limited to, a sensing chip attached to the outer wall of the electrothermal head 22. The sensing chip is located on the side or top surface of the electrothermal head 22, that is, away from the portion of the electrothermal head 22 that abuts against the soldering ribbon 40, so that the sensing chip does not contact and interfere with the soldering ribbon 40, thereby improving the accuracy of temperature measurement.

[0047] In one embodiment, at least two hot pressing assemblies 20 are provided and are sequentially spaced apart on the support base 10 along the length of the solder ribbon 40. In this way, each hot pressing assembly 20 can simultaneously achieve the compression, fixation, and welding operations of each solder ribbon 40 at at least two different positions along its length, thereby improving the welding efficiency of the battery cell 30.

[0048] It should be noted that the length direction of the soldering strip 40 in this embodiment is as follows: Figure 3 As shown by the arrow S in the middle.

[0049] It should be noted that the number of hot pressing components 20 is, for example, 1, 2, 3, 4 or other numbers, which can be flexibly adjusted and set according to actual needs.

[0050] See also Figure 1 、 Figure 2 、 Figure 5 and Figure 6In one embodiment, the solar cell welding apparatus further includes a push-pull mechanism 50 mounted on the support base 10, a first movable shaft 61 connected to the push-pull mechanism 50, and a plurality of first clamping assemblies 62 connected to the first movable shaft 61 and arranged sequentially and spaced apart along the axial direction of the first movable shaft 61. The push-pull mechanism 50 is configured to drive the first movable shaft 61 to move back and forth along its axial direction. The movement of the first movable shaft 61 synchronously drives the first clamping assemblies 62 to open or clamp. When clamping, each first clamping assembly 62 can correspondingly clamp each solder ribbon 40 on the solar cell 30. Taking a half-cell battery as an example, the push-pull mechanism 50 moves in the first direction, for example, so that each first clamping component 62 performs a clamping action, and each first clamping component 62 clamps a soldering ribbon 40 respectively, and clamps each soldering ribbon 40 to each PAD point 31 of the battery cell 30, so that the cut soldering ribbon 40 can be grabbed and placed on the battery string; in addition, after the soldering ribbon 40 is grabbed and placed on the battery string, since each first clamping component 62 still clamps the corresponding soldering ribbon 40, and each electric thermal pressure head 22 presses the soldering ribbon 40 tightly, the position of the soldering ribbon 40 can be effectively pre-fixed in a relatively stable manner, and then in the process of the electric thermal pressure head 22 being energized to weld the soldering ribbon 40, the PAD point 31 and the soldering ribbon 40 are welded and fixed, the welding quality is high, and the occurrence of soldering ribbon 40 offset and cold soldering defects can be avoided. On the contrary, after the welding of each welding strip 40 is completed, when the push-pull mechanism 50 moves in the opposite direction of the first direction, for example, each first clamping assembly 62 is loosened, and each first clamping assembly 62 releases the welding strip 40 it clamps.

[0051] In some embodiments, the push-pull mechanism 50 includes but is not limited to various forms of power mechanisms such as a cylinder, a motor screw, a hydraulic cylinder, a cam mechanism, etc.

[0052] In some embodiments, each first clamping assembly 62 is positioned correspondingly in the middle portion of the solder ribbon 40 to securely clamp the middle portion of the solder ribbon 40. Furthermore, two hot pressing assemblies 20 are provided, one at each opposite end of the solder ribbon 40. The two hot pressing assemblies 20 pre-fix the PAD points 31 at opposite ends of the solder ribbon 40 to the solder ribbon 40, achieving a welded connection after electrical heating. Furthermore, once the PAD points 31 and the solder ribbon 40 are welded and secured, no further secondary welding is required, thereby reducing laser welding time.

[0053] In one embodiment, the solar cell welding device further includes a second movable shaft 71 connected to the push-pull mechanism 50 and a plurality of second clamping assemblies 72 connected to the second movable shaft 71 and spaced apart along the axial direction of the second movable shaft 71. The push-pull mechanism 50 is further configured to drive the second movable shaft 71 to move back and forth along its axial direction. The movement of the second movable shaft 71 synchronously drives the respective second clamping assemblies 72 to open or clamp. During the clamping operation, each second clamping assembly 72 is capable of correspondingly clamping a respective solder ribbon 40 on the solar cell 30. Thus, each solder ribbon 40 is simultaneously clamped by a first clamping assembly 62 and a second clamping assembly 72. This ensures stable clamping of the solder ribbon 40 and allows the solder ribbon 40 to be accurately positioned and placed on the solar cell string. Furthermore, during the soldering process, the solder ribbon 40 maintains good stability on the solar cell string, thereby improving soldering quality.

[0054] The first movable shaft 61 and the second movable shaft 71 are arranged side by side and spaced apart. The push-pull mechanism 50 is located in the area between the first movable shaft 61 and the second movable shaft 71. Furthermore, the driving end of the push-pull mechanism 50 is connected to a push block 51, and the opposite ends of the push block 51 are connected to the first movable shaft 61 and the second movable shaft 71, respectively. When the push mechanism is activated, the push block 51 moves, thereby synchronously driving the first movable shaft 61 and the second movable shaft 71 to move back and forth.

[0055] Based on the above embodiment, the solar cell welding device further includes a first sliding seat 63 and a second sliding seat 73 connected to the support seat 10. The first movable shaft 61 is slidably disposed on the first sliding seat 63 along its axial direction, and the second movable shaft 71 is slidably disposed on the second sliding seat 73 along its axial direction.

[0056] Based on the aforementioned embodiment, the solar cell welding device further includes a third crossbeam 64 connected to the support base 10. The first clamping assembly 62 includes a first clamping arm 621 and a second clamping arm 622. The first clamping arm 621 is fixedly connected to the third crossbeam 64. A first limiting groove is provided at the bottom of the first clamping arm 621. The width of the first limiting groove is greater than the width of the welding ribbon 40, and the welding ribbon 40 is inserted into the first limiting groove. In addition, the bottom end of the second clamping arm 622 abuts against one side of the welding ribbon 40. The middle portion of the second clamping arm 622 is rotatably connected to the third crossbeam 64, and the top end of the second clamping arm 622 is movably connected to the first movable shaft 61. When the first movable shaft 61 moves back and forth, it can drive the second clamping arm 622 to swing. When the second clamping arm 622 swings, it can clamp or loosen the welding ribbon 40 accordingly.

[0057] Similarly, the solar cell welding device also includes a fourth crossbeam 74 connected to the support base 10. The second clamping assembly 72 includes a third clamping arm 721 and a fourth clamping arm 722. The third clamping arm 721 is fixedly connected to the fourth crossbeam 74. A second limiting groove 7211 is provided at the bottom of the third clamping arm 721. The width of the second limiting groove 7211 is greater than the width of the welding ribbon 40, and the welding ribbon 40 is inserted into the second limiting groove 7211. The bottom end of the fourth clamping arm 722 abuts against one side of the welding ribbon 40. The middle portion of the fourth clamping arm 722 is rotatably connected to the fourth crossbeam 74, and the top end of the fourth clamping arm 722 is movably connected to the second movable shaft 71. The back-and-forth movement of the second movable shaft 71 drives the fourth clamping arm 722 to swing. When the fourth clamping arm 722 swings, it can clamp or loosen the welding ribbon 40 accordingly.

[0058] In one embodiment, a solar cell production system includes the solar cell welding device according to any one of the above embodiments.

[0059] In the aforementioned solar cell production system, the lifting mechanism 21 drives the electric heating head 22 to move downward and compress the solder ribbon 40. When the electric heating head 22 is energized, it can transfer heat to the pressed portion of the solder ribbon 40. After the pressed portion of the solder ribbon 40 is heated, the solder in this local portion is melted by the heat, thereby achieving the solder ribbon 40 being welded and fixed to the solar cell 30. Compared to the welding or bonding methods used in related arts, the electric heating head 22 is pre-pressed on the solder ribbon 40 to achieve the initial fixation of the solder ribbon 40 to be welded, effectively avoiding the occurrence of offset during the welding process that may cause cold solder defects. As a result, the joint is free of cold solder holes and has good metallization, which can improve the welding quality. In addition, the point-to-point heating method in this embodiment will not cause additional thermal damage to the battery cell 30, has low requirements for the soldering ribbon 40, has instantaneous local heating, short heating time, and small thermal impact, can improve welding reliability, and will not produce energy loss problems such as infrared welding in related technologies. Moreover, there are no tedious steps such as dispensing and curing in the gluing process, which can improve production efficiency and will not cause the risk of contamination to the battery cell 30 caused by the dispensing method in related technologies.

[0060] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0061] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0062] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0063] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0064] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, 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 embodiment.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0066] The above-described embodiments merely represent several implementation methods of the present application. 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 a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A solar cell welding device, characterized in that: The solar cell welding device comprises: Support base (10); and A hot pressing assembly (20), wherein the hot pressing assembly (20) is mounted on the support seat (10), and the hot pressing assembly (20) comprises a lifting mechanism (21) mounted on the support seat (10) and an electric hot pressing head (22) connected to the lifting mechanism (21), wherein the lifting mechanism (21) is used to drive the electric hot pressing head (22) to move up and down so that the electric hot pressing head (22) moves downward to press the welding strip (40); when the electric hot pressing head (22) presses the welding strip (40), heat can be transferred to the welding strip (40), so that the welding strip (40) is welded to the battery cell (30) located below the welding strip (40).

2. The solar cell welding device according to claim 1, characterized in that: The hot pressing assembly (20) further includes a first crossbeam (23); the electric hot pressing heads (22) are multiple and are sequentially spaced apart on the first crossbeam (23) along the longitudinal direction of the first crossbeam (23); and the lifting mechanism (21) is connected to the first crossbeam (23).

3. The solar cell welding device according to claim 2, characterized in that: The hot pressing assembly (20) further includes at least one first guide member (24) disposed between the first crossbeam (23) and the support seat (10).

4. The solar cell welding device according to claim 2, characterized in that: The hot pressing assembly (20) further includes a plurality of elastic members (25), each of the elastic members (25) being correspondingly arranged between each of the electric hot pressing heads (22) and the first crossbeam (23).

5. The solar cell welding device according to claim 4, characterized in that: Each of the electric heating pressure heads (22) is provided with a second guide member (221), and the second guide member (221) is movably provided on the first crossbeam (23); the elastic member (25) is a spring sleeved on the second guide member (221), and the opposite ends of the elastic member (25) are respectively in contact with the first crossbeam (23) and the electric heating pressure head (22).

6. The solar cell welding device according to claim 1, characterized in that: The hot pressing assembly (20) further comprises a temperature sensor correspondingly connected to the electric hot pressing head (22), the temperature sensor being used to sense the temperature of the electric hot pressing head (22); the solar cell welding device further comprises a controller, the controller being connected to the temperature sensor, the controller being used to control the power-on time and / or the operating power of the electric hot pressing head (22) according to the temperature sensed by the temperature sensor.

7. The solar cell welding device according to claim 2, characterized in that: The hot pressing components (20) are provided in at least two and are sequentially spaced apart and arranged on the support seat (10) along the length direction of the welding strip (40).

8. The solar cell welding device according to claim 2, characterized in that: The solar cell welding device further comprises a push-pull mechanism (50) mounted on the support seat (10), a first movable shaft (61) connected to the push-pull mechanism (50), and a plurality of first clamping assemblies (62) connected to the first movable shaft (61) and arranged in sequence and spaced apart along the axial direction of the first movable shaft (61); the push-pull mechanism (50) is used to drive the first movable shaft (61) to move back and forth along its axial direction, and when the first movable shaft (61) moves, it can synchronously drive each of the first clamping assemblies (62) to open or clamp, and when each of the first clamping assemblies (62) is in a clamping action, it can correspondingly clamp each of the welding strips (40) on the cell sheet (30).

9. The solar cell welding device according to claim 8, characterized in that: The solar cell welding device further comprises a second movable shaft (71) connected to the push-pull mechanism (50) and a plurality of second clamping assemblies (72) connected to the second movable shaft (71) and arranged in sequence and spaced apart along the axial direction of the second movable shaft (71); the push-pull mechanism (50) is further used to drive the second movable shaft (71) to move back and forth along its axial direction, and when the second movable shaft (71) moves, it can synchronously drive each of the second clamping assemblies (72) to open or clamp, and when each of the second clamping assemblies (72) is in a clamping action, it can correspondingly clamp each of the welding strips (40) on the cell sheet (30).

10. A solar cell production system, characterized in that: The solar cell production system includes the solar cell welding device according to any one of claims 1 to 9.

Images