A photovoltaic panel battery cell string welding processing device

Abstract

The present invention belongs to the technical field of photovoltaic cell welding, and specifically relates to a photovoltaic panel cell string welding processing device, comprising: a conveying device, used to support and convey the cell; a heating channel, installed on the conveying path of the conveying device, so that the cell can pass through the heating channel, and the heating channel is provided with a heating device; a pressure roller, installed in the heating channel, and the pressure roller is equipped to move along a first direction and a vertical direction; a press, movably arranged in the heating channel along the vertical direction, and a convex portion is provided at the bottom of the press. The present invention sets a pressure roller type leveling mechanism in the heating channel, and the pressure roller can roll forward from the root of the warped part of the welding strip to the front end of the welding strip, so that the welding strip is closely attached to the cell, and at this time, the press is driven to press down, which can avoid the welding strip from being offset in the width direction, thereby improving the welding quality and yield rate.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic cell welding, and in particular relates to a serial welding processing device for photovoltaic panel cell sheets. Background Art

[0002] Photovoltaic panels are made of multiple layers of materials, with the core structure being the battery cell. Multiple battery cells are first connected in series and parallel, and then stacked together with other materials to form a photovoltaic panel.

[0003] The string welding machine is the core equipment for serial welding of battery cells. Its working principle is as follows: the battery cell picking robot places the battery cells one by one on the conveyor belt, and the welding tape picking robot places the welding tape one by one between two adjacent battery cells. Since the two ends of the welding tape need to be connected to different sides of the two adjacent battery cells respectively (that is, one end is connected to the upper side of the previous battery cell, and the other end is connected to the lower side of the next battery cell), the specific action flow of the battery cell picking robot and the welding tape picking robot is as follows: Figure 1-4 As shown, the battery cells are conveyed from left to right, so the battery cells are placed from right to left. The battery cell picking robot places the previous battery cell on the conveyor belt, and then the solder tape picking robot transfers the front half of the solder tape to the top of the previous battery cell and holds it. At this time, the battery cell picking robot places the next battery cell on the conveyor belt, and the rear end of the solder tape will be pressed down by the next battery cell. After the solder tape picking robot loosens the solder tape, the front end of the solder tape is exposed above the previous battery cell. Maintaining this state, each battery cell is sent to the heating channel for welding (the solder tape surface comes with metal solder). A press is provided in the heating channel, and the press is used to press the front half of the solder tape tightly onto the battery cell, as shown in FIG. Figure 5 As shown, in order to make the hot air fully contact with the welding area, a protrusion is generally provided at the bottom of the press, and the press uses the protrusion to press the welding strip, so that a channel for hot air circulation can be formed between the press and the battery cell.

[0004] However, since the solder ribbon itself has a certain rigidity, when the subsequent battery cell presses the solder ribbon, the front end of the solder ribbon will warp upward. Although the solder ribbon picking robot in the prior art can smooth the solder ribbon, since the solder ribbon itself has a certain elasticity, there will still be a certain warping. In the subsequent process of the press tool pressing the solder ribbon, the solder ribbon is likely to slip to the side of the protrusion, thereby causing welding failure. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a photovoltaic panel cell string welding processing device capable of improving welding quality.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a photovoltaic panel cell string welding device, which is used to weld a plurality of cells into a cell string, wherein the cell string comprises a plurality of cells arranged along a first direction, and adjacent cells are connected by a welding strip, wherein one end of the welding strip is electrically connected to a first electrode on the upper side of a preceding cell, and the other end of the welding strip is electrically connected to a second electrode on the lower side of a succeeding cell; the string welding device comprises:

[0007] A conveying device, used for supporting and conveying the battery sheet, wherein the conveying direction of the conveying device is arranged along the first direction;

[0008] A heating channel installed on the conveying path of the conveying device so that the battery sheet can pass through the heating channel, and a heating device is provided in the heating channel;

[0009] A pressure roller is installed in the heating channel, the axis direction of the pressure roller is horizontal and perpendicular to the first direction, and the pressure roller is configured to be able to move along the first direction and the vertical direction;

[0010] A press is movably arranged in the heating channel along the vertical direction, and a convex portion is provided at the bottom of the press, and at least a part of the projection of the convex portion on the upper side of the battery cell along the vertical direction coincides with the welding area on the upper side of the battery cell, and the welding area on the upper side of the battery cell refers to the area on the first electrode used for welding the welding strip.

[0011] In an optional embodiment of the present invention, a driving seat which reciprocates in a vertical direction is provided in the heating channel, a rocker arm which is cantilevered downward is provided on the driving seat, the rocker arm is hinged to the driving seat, a limiting portion for limiting the swing stroke of the rocker arm is provided between the rocker arm and the driving seat, the limiting portion is configured to enable the lower end of the rocker arm to always tilt forward, a first elastic element is provided between the rocker arm and the driving seat, the first elastic element is configured so that its elastic force can drive the rocker arm to swing backward; the pressure roller is rotatably connected to the lower end of the rocker arm.

[0012] In an optional embodiment of the present invention, a first linkage mechanism is provided between the press and the drive seat, and the first linkage mechanism is assembled as follows: when the drive seat moves downward within a first stroke, the first linkage mechanism drives the press to move downward, and when the drive seat moves upward within the first stroke, the first linkage mechanism drives the press to move upward; the first stroke is the lowest stroke in the total stroke of the drive seat.

[0013] In an optional embodiment of the present invention, the first linkage mechanism includes a first floating plate and a second elastic element, the first floating plate is movably arranged in the heating channel along the vertical direction, the press is fixedly connected to the first floating plate, and the second elastic element is assembled so that its elastic force drives the first floating plate to move upward; the first floating plate is located on the movement path of the driving seat when it moves downward, and when the driving seat moves into the first stroke, the driving seat conflicts with the first floating plate.

[0014] In an optional embodiment of the present invention, the conveying device includes a support platform, and a conveyor belt disposed on an upper surface of the support platform and moving along the first direction, and the conveyor belt is configured to be able to feed intermittently.

[0015] In an optional embodiment of the present invention, a presser foot is further provided in the heating channel, and the presser foot is arranged to reciprocate in the vertical direction to press the battery cell onto the conveyor belt.

[0016] In an optional embodiment of the present invention, a second linkage mechanism is provided between the presser foot and the drive seat, and the second linkage mechanism is configured to drive the presser foot to press the battery cell before the pressure roller contacts the battery cell when the drive seat moves downward.

[0017] In an optional embodiment of the present invention, the second linkage mechanism includes a second floating plate and a third elastic element, the presser foot is fixedly connected to the second floating plate, and the third elastic element is configured to drive the second floating plate to move downward by its elastic force; the second floating plate is located on the path of the driving seat when it moves upward, and when the driving seat is located within the second stroke, the driving seat conflicts with the second floating plate; the second stroke is the uppermost stroke in the total stroke of the driving seat.

[0018] In an optional embodiment of the present invention, the driving seat is connected to a linear driving element arranged outside the heating channel, so as to drive the driving seat to move up and down.

[0019] In an optional embodiment of the present invention, a plurality of the pressing rollers are provided, and each of the pressing rollers is respectively arranged corresponding to a plurality of the welding areas on the battery cell.

[0020] The technical effect of the present invention is that a pressure roller type leveling mechanism is arranged in the heating channel of the present invention, and the pressure roller can roll forward from the root of the warped part of the welding strip to the front end of the welding strip, so that the welding strip is tightly fitted to the battery cell. At this time, the pressing tool is driven downward to avoid the welding strip from being offset in the width direction, thereby improving the welding quality and the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a top view of the battery cell string welding arrangement structure;

[0022] Figure 2 It is a side view of the battery cell string welding arrangement structure;

[0023] Figure 3 yes Figure 2 A partial enlarged view of I;

[0024] Figure 4 yes Figure 2 Partial enlarged view of II;

[0025] Figure 5 is a stereogram of a press in the prior art;

[0026] Figure 6 is a three-dimensional diagram of a string welding processing device provided by an embodiment of the present invention;

[0027] Figure 7 is a cross-sectional view of the string welding device provided by an embodiment of the present invention in one of the states;

[0028] Figure 8 yes Figure 7 AA section view;

[0029] Fig. 9 is a cross-sectional view of the string welding device provided by an embodiment of the present invention in another state;

[0030] Fig.10 yes Fig. 9 BB cross-sectional view;

[0031] Explanation of the reference numerals: 10, battery string; 1, battery cell; 2, welding strip; 20, existing press; 21, protrusion; 31, conveyor belt; 32, support platform; 40, heating channel; 41, heating device; 50, linear drive element; 60, pressure roller; 61, rocker arm; 62, drive seat; 70, press; 71, first floating plate; 72, second elastic element; 80, press foot; 81, second floating plate; 82, third elastic element. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0034] In the description of the present invention, the "front" and "rear" are based on the conveying direction of the conveying device, that is, the incoming material side of the conveying device is the rear side, and the outgoing material side of the conveying device is the front side. Figure 7-10 For example, the right side of the figure is the front and the left side is the rear.

[0035] First combine Figure 1-5 As shown, the arrangement of the battery cells 1 during string welding is explained: when the string welding machine is working, the battery cell material taking robot places the battery cells 1 one by one on the conveyor belt 31, and the soldering strip material taking robot places the soldering strips 2 one by one between two adjacent battery cells 1. Since the two ends of the soldering strip 2 need to be connected to different sides of the two adjacent battery cells 1 respectively (that is, one end is connected to the upper side of the previous battery cell 1, and the other end is connected to the lower side of the next battery cell 1), the specific action flow of the battery cell material taking robot and the soldering strip material taking robot is as follows: Figure 1-4 As shown, assuming that the battery cell 1 is conveyed from left to right, each battery cell 1 is placed from right to left, the battery cell picking robot places the previous battery cell 1 on the conveyor belt 31, and then the solder tape picking robot transfers the front half of the solder tape 2 to the top of the previous battery cell 1 and holds it. At this time, the battery cell picking robot places the next battery cell 1 on the conveyor belt 31, and the rear end of the solder tape 2 will be pressed down by the next battery cell 1. After the solder tape picking robot releases the solder tape 2, the front end of the solder tape 2 is exposed above the previous battery cell 1. Maintaining this state, each battery cell 1 is sent to the heating channel 40 for welding (the surface of the solder tape 2 carries metal solder). A press is provided in the heating channel 40, and the press is used to press the front half of the solder tape 2 onto the battery cell 1. The existing press 20 is as shown in FIG. Figure 5 As shown, in order to make the hot air fully contact with the welding area, the bottom of the existing press 20 is generally provided with a protrusion 21. The existing press 20 uses the protrusion 21 to press the welding strip 2, so that a channel for hot air circulation can be formed between the existing press 20 and the battery cell 1.

[0036] However, since the soldering ribbon 2 itself has a certain rigidity, when the next battery cell 1 presses the soldering ribbon 2, the front end of the soldering ribbon 2 will bend upwards, such as Figure 3As shown, although the solder strip retrieving manipulator in the prior art can smooth the solder strip 2, since the solder strip 2 itself has a certain elasticity, when the solder strip retrieving manipulator releases the solder strip 2, the front end of the solder strip 2 will still be warped due to rebound. In the subsequent process of the existing press 20 pressing the solder strip 2, the solder strip 2 is likely to slip off to the side of the protrusion 21, thereby causing welding failure. For this reason, the present invention sets a pressure roller type leveling mechanism in the heating channel 40, and the pressure roller 60 can roll forward from the root of the warped part of the solder strip 2 to the front end of the solder strip 2, so that the solder strip 2 is closely attached to the battery cell 1. At this time, the press 70 is driven downward to avoid the solder strip 2 from being offset in the width direction, thereby improving the welding quality and yield rate.

[0037] See also Figure 1-4 , 6-10, the technical solution of the present invention is described in detail below in conjunction with specific embodiments:

[0038] The string welding device provided in the embodiment of the present invention is used to weld a plurality of battery cells 1 into a battery string 10. Figure 1-4 As shown, the battery string 10 includes a plurality of battery cells 1 arranged along a first direction, and adjacent battery cells 1 are connected by welding strips 2, one end of the welding strips 2 is electrically connected to a first electrode (not shown) on the upper side of a preceding battery cell 1, and the other end of the welding strips 2 is electrically connected to a second electrode (not shown) on the lower side of a succeeding battery cell 1.

[0039] See also Figure 6-10 As shown, the string welding processing device includes a conveying device, a heating channel 40, a pressure roller 60 and a press 70; the conveying device is used to support and convey the battery cell 1, and the conveying direction of the conveying device is arranged along the first direction; the heating channel 40 is installed on the conveying path of the conveying device so that the battery cell 1 can pass through the heating channel 40, and a heating device 41 is provided in the heating channel 40; the pressure roller 60 is installed in the heating channel 40, and the axial direction of the pressure roller 60 is horizontal and perpendicular to the first direction, and the pressure roller 60 is assembled to be able to move in the first direction and the vertical direction; the press 70 is movably arranged in the heating channel 40 along the vertical direction, and a convex portion is provided at the bottom of the press 70, and at least a part of the projection of the convex portion on the upper side of the battery cell 1 in the vertical direction coincides with the welding area on the upper side of the battery cell 1, and the welding area on the upper side of the battery cell 1 refers to the area on the first electrode used for welding the welding strip 2. The pressure roller 60 can roll forward from the root of the warped part of the welding ribbon 2 to the front end of the welding ribbon 2, so that the welding ribbon 2 is tightly fitted with the battery cell 1. At this time, the pressing tool 70 is driven downward to avoid the welding ribbon 2 from being offset in the width direction, thereby improving the welding quality and yield rate.

[0040] It should be understood that the up and down movement of the pressing roller 60 is to avoid the warped solder strip 2 in the rear incoming material. Specifically, when the battery cell 1 is fed forward, the pressing roller 60 is lifted to Figure 7 In the state shown, the pressure roller 60 will not block the warped solder ribbon 2. When the warped solder ribbon 2 moves to the front side of the pressure roller 60, the pressure roller 60 moves downward and presses against the upper end of the battery cell 1. At this time, the pressure roller 60 rolls forward to flatten the warped solder ribbon 2. After the pressure roller 60 moves to the front end of the solder ribbon 2, it needs to remain above the front end of the solder ribbon 2 until the soldering of the solder ribbon 2 is completed to avoid the solder ribbon 2 from rebounding before the soldering is completed.

[0041] See also Figure 7-10 As shown, in an optional embodiment of the present invention, a driving seat 62 that reciprocates in the vertical direction is provided in the heating channel 40, and a swing rod 61 that is cantilevered downward is provided on the driving seat 62, and the swing rod 61 is hinged to the driving seat 62, and a limiting portion (not shown in the figure) for limiting the swing stroke of the swing rod 61 is provided between the swing rod 61 and the driving seat 62, and the limiting portion is configured to enable the lower end of the swing rod 61 to always tilt forward, and a first elastic element (not shown in the figure) is provided between the swing rod 61 and the driving seat 62, and the first elastic element is configured so that its elastic force can drive the swing rod 61 to swing backward; the pressure roller 60 is rotatably connected to the lower end of the swing rod 61. In a specific embodiment, the limiting portion can be, for example, a stopper, and the first elastic element can be, for example, a torsion spring.

[0042] contrast Figure 7 , 9 As shown, the movement process of the pressing roller 60 is as follows: Assuming Figure 7 The figure shows the initial state. When the driving seat 62 moves downward, the pressing roller 60 first falls on the battery cell 1. After the pressing roller 60 is vertically blocked by the battery cell 1, it rolls forward along the battery cell 1 until Fig. 9 In the state shown, during this process, the pressure roller 60 flattens the welding strip 2. In this embodiment, one driving element is used to realize the up-and-down movement and horizontal rolling of the pressure roller 60, which simplifies the device structure. It should be understood that in some other embodiments, the up-and-down movement and horizontal movement of the pressure roller 60 can also be driven by different driving elements, for example, a cross slide can be used to drive the pressure roller 60 to move up-and-down and horizontally.

[0043] See also Figure 7-10As shown, in an optional embodiment of the present invention, a first linkage mechanism is provided between the press 70 and the drive seat 62, and the first linkage mechanism is configured such that: when the drive seat 62 moves downward in the first stroke, the first linkage mechanism drives the press 70 to move downward, and when the drive seat 62 moves upward in the first stroke, the first linkage mechanism drives the press 70 to move upward; the first stroke is the lowest stroke in the total stroke of the drive seat 62. Specifically, the first linkage mechanism includes a first floating plate 71 and a second elastic element 72, the first floating plate 71 is movably arranged in the heating channel 40 along the vertical direction, the press 70 is fixedly connected to the first floating plate 71, and the second elastic element 72 is configured such that its elastic force drives the first floating plate 71 to move upward; the first floating plate 71 is located on the movement path of the drive seat 62 when it moves downward, and when the drive seat 62 moves into the first stroke, the drive seat 62 conflicts with the first floating plate 71. In a specific embodiment, the second elastic element 72 can be a compression spring or a tension spring.

[0044] In this embodiment, the pressing tool 70 is driven downward only when the pressing roller 60 is about to move to the front end of the welding strip 2, so that the pressing tool 70 can always be kept at a lower position, which is closer to the heating device 41, and can effectively prevent the pressing tool 70 from losing temperature and improve the welding efficiency. The present invention uses a driving element to drive the pressing roller 60 and the pressing tool 70 at the same time, further simplifying the device structure. It should be understood that in some other embodiments, the pressing tool 70 can also be driven by an independent driving element.

[0045] See also Figure 6-10 As shown, in an optional embodiment of the present invention, the conveying device includes a support table 32, and a conveyor belt 31 disposed on the upper surface of the support table 32 and moving along the first direction, and the conveyor belt 31 is configured to be able to feed intermittently. It should be understood that the conveyor belt 31 itself is flexible, so the support is poor. In this embodiment, the support table 32 is disposed under the conveyor belt 31 to ensure the stability of the battery cell 1 during the conveying process.

[0046] See also Figure 7 , 8As shown in Figures 10, in an optional embodiment of the present invention, a presser foot 80 is further provided in the heating channel 40, and the presser foot 80 is arranged to reciprocate in the vertical direction, and is used to press the battery cell 1 onto the conveyor belt 31. Further, a second linkage mechanism is provided between the presser foot 80 and the drive seat 62, and the second linkage mechanism is configured so that when the drive seat 62 moves downward, the second linkage mechanism drives the presser foot 80 to press the battery cell 1 before the pressure roller 60 contacts the battery cell 1. Specifically, the second linkage mechanism includes a second floating plate 81 and a third elastic element 82, the presser foot 80 is fixedly connected to the second floating plate 81, and the third elastic element 82 is configured so that its elastic force drives the second floating plate 81 to move downward; the second floating plate 81 is located on the path when the drive seat 62 moves upward, and when the drive seat 62 is located in the second stroke, the drive seat 62 contacts the second floating plate 81; the second stroke is the uppermost stroke in the total stroke of the drive seat 62. In a specific embodiment, the third elastic element 82 may be a compression spring or a tension spring.

[0047] It should be understood that when the pressure roller 60 rolls forward along the battery cell 1, the friction between the two may cause the battery cell 1 to slide forward. For this reason, the present embodiment is provided with a pressure foot 80, which can press the battery cell 1 before the pressure roller 60 contacts the battery cell 1 to prevent the battery cell 1 from sliding forward. The present embodiment drives the pressure roller 60 and the pressure foot 80 to move simultaneously by a driving element, thereby simplifying the device structure. It should be understood that in some other embodiments, the pressure foot 80 may also be driven by an independent driving element. Furthermore, in some embodiments, when a negative pressure adsorption device is provided on the support platform 32, the above-mentioned pressure foot 80 may not even be provided.

[0048] See also Figure 6-10 As shown, in an optional embodiment of the present invention, the driving seat 62 is connected to the linear driving element 50 arranged on the outside of the heating channel 40, which is used to drive the driving seat 62 to move up and down. In a specific embodiment, the linear driving element 50 can be, for example, an electric cylinder, a pneumatic cylinder, a hydraulic cylinder, etc.

[0049] See also Figure 8 As shown, in an optional embodiment of the present invention, a plurality of the pressing rollers 60 are provided, and each of the pressing rollers 60 is respectively provided corresponding to the plurality of welding areas on the battery cell 1. This can prevent a whole pressing roller 60 from interfering with the pressing foot 80 when rolling. It should be understood that when the pressing foot 80 is not provided, the pressing roller 60 can be provided as a whole.

[0050] In summary, the present invention sets a pressure roller type leveling mechanism in the heating channel 40, and the pressure roller 60 can roll forward from the root of the warped part of the welding strip 2 to the front end of the welding strip 2, so that the welding strip 2 is tightly fitted with the battery cell 1. At this time, the pressing tool 70 is driven downward to avoid the welding strip 2 from being offset along the width direction, thereby improving the welding quality and the yield rate; the present invention adopts a driving element to realize the up and down movement and horizontal rolling of the pressure roller 60, thereby simplifying the equipment structure; the present invention uses a driving element to simultaneously drive the pressure roller 60, the pressing tool 70 and the pressure foot 80 to move, thereby further simplifying the equipment structure.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0052] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

Claims

1. A photovoltaic panel battery cell string welding processing device, characterized in that: Used to weld a plurality of battery cells (1) into a battery string (10), the battery string (10) comprising a plurality of battery cells (1) arranged along a first direction, adjacent battery cells (1) being connected via welding strips (2), one end of the welding strip (2) being electrically connected to a first electrode on the upper side of a preceding battery cell (1), and the other end of the welding strip (2) being electrically connected to a second electrode on the lower side of a succeeding battery cell (1); the string welding processing device comprising: A conveying device, used for supporting and conveying the battery cell (1), wherein the conveying direction of the conveying device is arranged along the first direction; A heating channel (40) is installed on a conveying path of the conveying device so that the battery cell (1) can pass through the heating channel (40), and a heating device (41) is provided in the heating channel (40); a pressure roller (60) installed in the heating channel (40), the axis direction of the pressure roller (60) being horizontal and perpendicular to the first direction, and the pressure roller (60) being configured to be movable along the first direction and the vertical direction; A press (70) is movably arranged in the heating channel (40) along a vertical direction, a convex portion is provided at the bottom of the press (70), at least a portion of the projection of the convex portion on the upper side of the battery cell (1) along the vertical direction overlaps with a welding area on the upper side of the battery cell (1), and the welding area on the upper side of the battery cell (1) refers to an area on the first electrode used for welding the welding strip (2); A drive seat (62) capable of reciprocating in a vertical direction is provided in the heating channel (40); a swing rod (61) cantilevered downward is provided on the drive seat (62); the swing rod (61) is hinged to the drive seat (62); a limit portion for limiting the swing stroke of the swing rod (61) is provided between the swing rod (61) and the drive seat (62); the limit portion is configured to enable the lower end of the swing rod (61) to always tilt forward; a first elastic element is provided between the swing rod (61) and the drive seat (62); the first elastic element is configured such that its elastic force can drive the swing rod (61) to swing backward; the pressure roller (60) is rotatably connected to the lower end of the swing rod (61); A first linkage mechanism is provided between the press (70) and the drive seat (62), and the first linkage mechanism is configured such that: when the drive seat (62) moves downward within a first stroke, the first linkage mechanism drives the press (70) to move downward, and when the drive seat (62) moves upward within the first stroke, the first linkage mechanism drives the press (70) to move upward; the first stroke is the lowest stroke in the total stroke of the drive seat (62); The first linkage mechanism comprises a first floating plate (71) and a second elastic element (72); the first floating plate (71) is movably arranged in the heating channel (40) along the vertical direction; the pressing tool (70) is fixedly connected to the first floating plate (71); the second elastic element (72) is arranged so that its elastic force drives the first floating plate (71) to move upward; the first floating plate (71) is located on the movement path of the driving seat (62) when it moves downward; when the driving seat (62) moves into the first stroke, the driving seat (62) contacts the first floating plate (71).

2. The photovoltaic panel cell string welding processing device according to claim 1, characterized in that: The conveying device comprises a support platform (32), and a conveyor belt (31) arranged on the upper surface of the support platform (32) and moving along the first direction, wherein the conveyor belt (31) is configured to be capable of intermittent feeding.

3. The photovoltaic panel cell string welding processing device according to claim 2, characterized in that: A presser foot (80) is also provided in the heating channel (40), and the presser foot (80) is arranged to reciprocate in a vertical direction and is used to press the battery sheet (1) onto the conveyor belt (31).

4. The photovoltaic panel cell string welding processing device according to claim 3, characterized in that: A second linkage mechanism is provided between the presser foot (80) and the drive seat (62), and the second linkage mechanism is configured so that when the drive seat (62) moves downward, the second linkage mechanism drives the presser foot (80) to press the battery cell (1) before the pressing roller (60) contacts the battery cell (1); The second linkage mechanism comprises a second floating plate (81) and a third elastic element (82); the presser foot (80) is fixedly connected to the second floating plate (81); the third elastic element (82) is arranged so that its elastic force drives the second floating plate (81) to move downward; the second floating plate (81) is located on a path of the driving seat (62) when it moves upward; when the driving seat (62) is located within a second stroke, the driving seat (62) contacts the second floating plate (81); the second stroke is the uppermost stroke in the total stroke of the driving seat (62).

5. The photovoltaic panel cell string welding processing device according to claim 1, characterized in that: The driving seat (62) is connected to a linear driving element (50) arranged outside the heating channel (40) and is used to drive the driving seat (62) to move up and down.

6. The photovoltaic panel cell string welding processing device according to claim 1, characterized in that: A plurality of the pressing rollers (60) are provided, and each of the pressing rollers (60) is arranged corresponding to a plurality of the welding areas on the battery cell (1).

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