Solar cell string welding equipment and transmission method

Abstract

The present invention discloses a solar cell string welding device and a transmission method thereof. The string welding device comprises a frame and a transmission device, wherein a support member is fixedly arranged on the frame, and the support member has a plurality of support members arranged at intervals along a first direction, and a support gap is provided between each two adjacent support members; the transmission device comprises a lifting frame, and the lifting frame can be connected to the frame in a relative motion along the first direction and along the up-down direction, and a lifting member is fixedly arranged on the lifting frame, and the lifting member has a plurality of lift members arranged at intervals along the first direction. The transmission method comprises the following steps: S1, the lift member is located below the first station; S2, the lift member moves upward and lifts the cell to above the first station; S3, the lift member moves in the horizontal direction and transfers the cell to above the second station; S4, the lift member moves downward so that the cell falls on the second station, and the lift member continues to move downward to below the second station; S5, the lift member moves in the horizontal direction to below the first station.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell welding, and in particular to a solar cell series welding device and a transmission method. Background Art

[0002] In the string welding process of solar cells, multiple cells are arranged in sequence, and each two adjacent cells are welded together by conductive welding tape, so as to obtain a solar cell string. The cell string has higher working efficiency than a single cell. The string welding equipment in the prior art mainly uses a conveyor belt to orderly transmit multiple cells in a group of cell strings. The transmission direction of the cell is the extension direction of the cell string. Each cell needs to go through the steps of loading, placing welding tape, preheating, welding, unloading, etc. in the transmission process. Under ideal conditions, there should be no relative displacement after the welding tape is placed on the cell. The accuracy of the welding position of the welding tape directly affects the product quality of the entire cell string. However, the existing conveyor belt mainly transmits the cell and the welding tape by friction. The conveyor belt itself is easy to deviate from the position, and the problem of offset and misalignment between the cell and the welding tape is also difficult to avoid. From the loading of the welding tape to its welding and fixing with the cell, it usually takes a considerable distance of transmission, which further increases the risk of misalignment of the welding tape. There are also some string welding equipment that can be used to weld multiple groups of battery strings at the same time. At this time, the conveyor belt needs to synchronously transmit multiple battery cells arranged in the array. The conveyor belt is more prone to deformation and distortion, which further reduces the string welding accuracy of multiple groups of battery strings. In addition, the leather conveyor belt is easily damaged after long-term use and needs to be replaced frequently. Replacing the conveyor belt will also consume more manpower and time. Therefore, in the existing solar cell string welding equipment, the quality of the battery string is difficult to guarantee. In addition, in order to increase the friction between the battery cell and the conveyor belt, some transmission devices are further provided with auxiliary structures such as gravity pressure blocks or vacuum adsorption. These auxiliary structures need to move with the conveyor belt, which makes the transmission device bulky and more complex in structure. Summary of the invention

[0003] The purpose of the present invention is to provide a solar cell string welding device and a transmission method with stable transmission of cells and welding strips, less prone to misalignment and simple control in order to solve the problems existing in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A solar cell string welding device, used for string welding a plurality of solar cells, wherein the plurality of solar cells are arranged in sequence along a first direction, the first direction extending along a horizontal direction, the string welding device comprising a frame and a transmission device, the frame being fixed with a support member for supporting the solar cells, the support member having a plurality of spaced apart arrangement along the first direction, and a support gap being provided between each two adjacent support members;

[0006] The transmission device comprises a lifting frame, the lifting frame is connected to the frame so as to be relatively movable along the first direction and along the up-down direction, a lifting member for supporting the battery sheet is fixed on the lifting frame, and the lifting member has a plurality of lifting members spaced apart along the first direction;

[0007] The first supporting surface, the second supporting surface, the first bottom surface, and the second bottom surface are four virtual horizontal surfaces that are not completely the same. The first supporting surface is higher than the first bottom surface, and the second supporting surface is higher than the second bottom surface. The upper surfaces of the plurality of supporting members are all located in the first supporting surface, and the upper surfaces of the plurality of lifting members are all located in the second supporting surface. The lowest points of the lower surfaces of the plurality of supporting members are located in the first bottom surface, and the lowest points of the lower surfaces of the plurality of lifting members are located in the second bottom surface.

[0008] The lifting frame has a first position, a second position, a third position and a fourth position relative to the frame, wherein:

[0009] When the lifting frame is in the first position, the second supporting surface is not higher than the first bottom surface;

[0010] When the lifting frame is in the second position, the second bottom surface is not lower than the first supporting surface;

[0011] When the lifting frame is in the third position, the second bottom surface is not lower than the first supporting surface;

[0012] When the lifting frame is in the fourth position, the second supporting surface is not higher than the first bottom surface;

[0013] When the lifting frame moves from the first position to the second position, the plurality of lifting members respectively pass through the support gaps at corresponding positions from bottom to top;

[0014] When the lifting frame moves from the second position to the third position, the lifting frame moves along the first direction;

[0015] When the lifting frame moves from the third position to the fourth position, the plurality of lifting members respectively pass through the support gaps at corresponding positions from top to bottom;

[0016] When the lifting frame moves from the fourth position to the first position, the lifting frame moves along the first direction.

[0017] In some embodiments, when the lifting frame is converted from the first position to the second position, one of the lifting members passes through each of the supporting gaps.

[0018] In some embodiments, the lifting frame includes a connecting frame, which extends along the first direction, and the multiple lifting members are fixed on the connecting frame. The second direction is a horizontal direction perpendicular to the first direction. Along the second direction: the connecting frame is arranged on one side of the multiple lifting members, and the connecting frame is arranged on one side of the multiple supporting members.

[0019] In some embodiments, a transmission channel is provided on the frame, the transmission channel extends along the first direction, the transmission channel is communicated with the plurality of support gaps, and the transmission channel is arranged on one side of the second direction of the plurality of support members. When the lifting frame moves from the first position to the second position, at least a portion of the connecting frame passes through the transmission channel from bottom to top; when the lifting frame moves from the third position to the fourth position, at least a portion of the connecting frame passes through the transmission channel from top to bottom.

[0020] In some embodiments, when the lifting frame moves from the second position to the third position, a portion of the connecting frame moves along the first direction in the transmission channel.

[0021] In some embodiments, the frame is fixedly provided with a plurality of support groups spaced apart along a second direction, the second direction extends along a horizontal direction, the second direction is perpendicular to the first direction, and each of the support groups includes the plurality of support members spaced apart along the first direction; the lifting frame is fixedly provided with a plurality of lifting groups spaced apart along the second direction, each of the lifting groups includes the plurality of lifting members spaced apart along the first direction; along the second direction, the plurality of support groups correspond one-to-one with the plurality of lifting groups, and each of the lifting groups can move relative to the corresponding support group along the first direction.

[0022] In some embodiments, the lifting frame includes a connecting frame, which extends along the first direction. Along the second direction, the connecting frame is arranged between two adjacent groups of the jacking groups, and each of the jacking members in the two adjacent groups of the jacking groups is fixed on the connecting frame.

[0023] In some embodiments, the connecting frame has one or a plurality of transmission channels spaced apart along the second direction, the frame is provided with one or more transmission channels, each of the transmission channels extends along the first direction, each of the transmission channels is arranged between two adjacent groups of support groups along the second direction, each of the transmission channels is connected to a plurality of adjacent support gaps, and each of the connecting frames can pass through the transmission channels at corresponding positions in the up and down directions.

[0024] In some embodiments, each of the support members has a first positioning structure, and at least one of the two lifting members adjacent to each other along the first direction has a second positioning structure, one of the first positioning structure and the second positioning structure is a protrusion, and the other is a groove, the protrusion protrudes along the horizontal direction, and the groove is recessed along the horizontal direction; each of the second positioning structures can cooperate with the first positioning structures of multiple different support members, and the multiple different support members are arranged at intervals along the first direction; when the lifting frame moves from the first position to the second position, each of the second positioning structures can pass through one of the first positioning structures at the corresponding position from bottom to top; when the lifting frame moves from the third position to the fourth position, each of the second positioning structures can pass through another of the first positioning structures at the corresponding position from top to bottom.

[0025] In some embodiments, along the first direction: the width of each of the support members is respectively equal, the width of each of the support gaps is respectively equal, and the width of each of the support gaps is smaller than the width of each of the support members.

[0026] In some embodiments, the transmission device also includes a transmission frame, which is capable of being connected to the frame for relative movement along the first direction, and the lifting frame is capable of being connected to the transmission frame for relative movement along the up and down directions. The transmission device also includes a first driving mechanism for driving the transmission frame to move relative to the first direction, and a second driving mechanism for driving the lifting frame to move relative to the up and down directions.

[0027] A solar cell transmission method is used to transmit the solar cell from a first station to a second station, wherein the first station and the second station are arranged horizontally spaced apart, and the transmission method comprises the following steps in sequence:

[0028] S1, the battery cell to be transferred is located at the first station, and the lifting member is located below the first station;

[0029] S2, the lifting member moves upward and lifts the battery cell to above the first station;

[0030] S3, the lifting member moves in a horizontal direction and transfers the battery cell to above the second station;

[0031] S4, the lifting member moves downward, so that the battery cell falls on the second station, and the lifting member continues to move downward to below the second station;

[0032] S5. The lifting member moves horizontally to below the first workstation, and then steps S1 to S4 are repeated.

[0033] In some embodiments, the transmission method is performed using the solar cell string welding equipment.

[0034] In some embodiments, the transport method is used to transport the first battery cell from the first station to the second station, and is also used to transport the second battery cell from the third station to the fourth station, the second station is the same as or different from the third station, the first battery cell and the second battery cell are connected in series, the distance between the first station and the second station is equal to the distance between the third station and the fourth station, the lifting member includes a first lifting member and a second lifting member, and the first lifting member and the second lifting member move synchronously;

[0035] In the step S1: the first battery cell is located at the first station, the second battery cell is located at the third station, the first lifting member is located below the first station, and the second lifting member is located below the third station;

[0036] In step S2: the first lifting member and the second lifting member move upward simultaneously, the first lifting member lifts the first battery cell to above the first station, and the second lifting member lifts the second battery cell to above the third station;

[0037] In step S3: the first lifting member and the second lifting member move in the horizontal direction simultaneously, the first lifting member transfers the first battery cell to above the second station, and the second lifting member transfers the second battery cell to above the fourth station;

[0038] In step S4: the first lifting member and the second lifting member move downward simultaneously, so that the first battery cell falls on the second station and the second battery cell falls on the fourth station, the first lifting member continues to move downward to below the second station, and the second lifting member continues to move downward to below the fourth station;

[0039] In the step S5: the first lifting member and the second lifting member move in the horizontal direction simultaneously, the first lifting member moves to below the first station, the second lifting member moves to below the third station, and then the steps S1 to S4 are repeated.

[0040] Due to the application of the above technical solutions, the solar cell string welding equipment and transmission method provided by the present invention abandon the traditional conveyor belt friction transmission method, so that the string welding equipment can significantly reduce the risk of displacement and misalignment between the cell and the welding strip during the cell transmission process and the string welding process. The present invention can be applied to the synchronous transmission of a group or multiple groups of battery strings arranged side by side. Through the coordinated arrangement of the lifting member and the support member, it is not easy for each cell and the lifting member or the support member to be displaced in the horizontal direction. During the transmission of the cell, the cell is stably supported by the lifting member or the support member by its own gravity, and the cell and the lifting member are relatively stationary; during the string welding process, the cell and the welding strip thereon can be preheated, welded and other string welding processes on the stationary support member. During this process, the transmission device is out of contact with the cell, further reducing the risk of misalignment between the cell and the welding strip. The transmission device of the present invention does not deform during operation, is not easily damaged by friction, and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0042] Attached Figure 1 It is a three-dimensional schematic diagram of a solar cell string welding device in a specific embodiment of the present invention;

[0043] Attached Figure 2 is a three-dimensional schematic diagram of the frame in this embodiment;

[0044] Attached Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0045] Attached Figure 4 is a three-dimensional schematic diagram of the transmission device in this embodiment;

[0046] Attached Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0047] Attached Figure 6 is a three-dimensional schematic diagram of the string welding equipment in this embodiment, wherein the lifting frame is in the third position;

[0048] Attached Figure 7 for Figure 6 The enlarged schematic diagram at C in the middle;

[0049] Attached Figure 8 It is a front view schematic diagram of the string welding equipment in this embodiment, wherein the lifting frame is in the first position;

[0050] Attached Fig. 9 It is a schematic front view of the string welding device in this embodiment, wherein the lifting frame is in the second position;

[0051] Attached Fig.10 It is a schematic diagram of the front view of the string welding equipment in this embodiment, wherein the lifting frame is in the third position;

[0052] Attached Fig.11 is a schematic front view of the string welding device in this embodiment, wherein the lifting frame is in the fourth position;

[0053] Wherein: 1, battery cell; 11, battery string; 100, rack; 101, support gap; 102, transmission channel; 110, support member; 111, groove; 110a, support group; 200, transmission device; 210, lifting frame; 211, lifting member; 2111, protrusion; 211a, lifting group; 212, connecting frame; 2121, connecting member; 220, transmission frame; 230, first driving mechanism; 240, second driving mechanism; 1001, first supporting surface; 1002, second supporting surface; 1003, first bottom surface; 1004, second bottom surface; X, first direction; Y, second direction; Z, up and down direction. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, but they are not intended to limit the present invention.

[0055] See also Figure 1 As shown, a solar cell string welding device is used to string a plurality of cells 1, wherein the plurality of cells 1 are arranged in sequence along a first direction X, the first direction X extends along a horizontal direction, and each two adjacent cells 1 along the first direction X are connected in series through a conductive welding ribbon. The string welding device includes a frame 100 and a transmission device 200. In this embodiment, an XYZ three-dimensional coordinate system is established with the frame 100 as a reference, wherein the first direction X, the second direction Y, and the up-down direction Z are perpendicular to each other, the first direction X and the second direction Y extend in the horizontal direction respectively, and the up-down direction Z extends in the vertical direction.

[0056] In this embodiment, in order to facilitate observation and description of the specific structure of the string welding equipment, Figure 1 Only some of the battery cells 1 and welding strips placed on the string welding device are shown. As can be seen from the figure, the string welding device in this embodiment can not only perform string welding on multiple battery cells 1 arranged in sequence along the first direction X, but also can perform string welding on multiple groups of battery strings 11 arranged side by side along the second direction Y at the same time, and each group of battery strings 11 includes the above-mentioned multiple battery cells 1 arranged in sequence along the first direction X. Figure 1Specifically shown are three groups of battery strings 11 arranged side by side along the second direction Y. The three groups of battery strings 11 can move synchronously under the transmission of the transmission device 200, and receive preheating, welding and other treatments at different stations of the rack 100, so as to obtain higher string welding efficiency.

[0057] See also Figure 2 and Figure 3 As shown, in this embodiment, a support member 110 for supporting the battery cell 1 is fixed on the frame 100, and the support member 110 has a plurality of support members 110 arranged at intervals along the first direction X, and a support gap 101 is provided between each two adjacent support members 110 along the first direction X. It should be noted that, due to the large number of support members 110 in the entire string welding equipment, in order to make the drawings clearer, more concise and easier to observe, only some of the support members 110 and the support gap 101 are marked in the figure, and the same situation also applies to the battery cell 1 and the transmission channel 102, support group 110a, lifting member 211, lifting group 211a, protrusion 2111, groove 111, etc. in the following text, which will not be repeated later. In this embodiment, along the first direction X: the width of each support member 110 is equal, the width of each support gap 101 is equal, and the width of each support gap 101 is smaller than the width of each support member 110, so that each support member 110 has a larger support area for the battery cell 1, and the support is more stable.

[0058] See also Figure 2 and Figure 3 As shown, in this embodiment, a transmission channel 102 is provided on the rack 100, and the transmission channel 102 extends along the first direction X, and the transmission channel 102 is arranged on one side of the second direction Y of the multiple support members 110 arranged along the first direction X, and each transmission channel 102 is connected to the adjacent multiple support gaps 101. In this embodiment, corresponding to the multiple groups of battery strings 11 arranged side by side along the second direction Y, the rack 100 is fixed with multiple groups of support groups 110a arranged at intervals along the second direction Y, and each group of support groups 110a includes the multiple support members 110 arranged at intervals along the first direction X. Accordingly, one or more transmission channels 102 are provided on the rack 100, and each transmission channel 102 is arranged between two adjacent groups of support groups 110a along the second direction Y. As can be seen from the figure, in this embodiment, the multiple support members 110 on the frame 100 are arranged in an array in the horizontal plane. These support members 110 can be specifically divided into six support groups 110a. Among the four support groups 110a located in the middle, the support members 110 adjacent to each other along the second direction Y are arranged in pairs, which helps to simplify the structure of the string welding device. Correspondingly, three transmission channels 102 extending along the first direction X are formed between the six support groups 110a. Each transmission channel 102 runs through the frame 100 from the rear end. The "rear end" mentioned here specifically refers to the end of the string welding device connected to the downstream device. Figure 2 It is represented as the right end along the first direction X.

[0059] See also Figure 1 As shown, in this embodiment, the width of each battery cell 1 along the first direction X is slightly larger than the width of one support member 110, and the length of each battery cell 1 along the second direction Y is approximately equal to the sum of the lengths of the two support members 110. Therefore, two adjacent support members 110 along the second direction Y can jointly support one battery cell 1, and six support groups 110a can just support three battery strings 11.

[0060] See also Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, the transmission device 200 includes a lifting frame 210, a transmission frame 220, a first driving mechanism 230 and a second driving mechanism 240. Among them, the lifting frame 210 can be connected to the frame 100 for relative movement along the first direction X and the up-down direction Z. In this embodiment, specifically, the transmission frame 220 can be connected to the frame 100 for relative movement along the first direction X, and the lifting frame 210 can be connected to the transmission frame 220 for relative movement along the up-down direction Z. The first driving mechanism 230 is used to drive the transmission frame 220 to move relative to the first direction X, and the second driving mechanism 240 is used to drive the lifting frame 210 to move relative to the up-down direction Z. In this embodiment, the first driving mechanism 230 specifically adopts a structure in which a cylinder and a track are matched, and the second driving mechanism 240 specifically adopts a cylinder.

[0061] See also Figure 4 and Figure 5 As shown, in this embodiment, a lifting member 211 for supporting the battery cell 1 is fixed on the lifting frame 210, and the lifting member 211 has a plurality of lifting members 211 arranged at intervals along the first direction X. The lifting frame 210 further includes a connecting frame 212, the connecting frame 212 extends along the first direction X, and the plurality of lifting members 211 are fixed on the connecting frame 212, specifically, one end of each lifting member 211 along the second direction Y is fixed on the corresponding connecting frame 212. Along the second direction Y: the connecting frame 212 is arranged on one side of the plurality of lifting members 211, and the connecting frame 212 is arranged on one side of the plurality of supporting members 110. Each connecting frame 212 can pass through the transmission channel 102 at the corresponding position along the up-down direction Z.

[0062] See also Figure 4 and Figure 5As shown, in this embodiment, corresponding to the above-mentioned multiple battery strings 11 and multiple support groups 110a, the lifting frame 210 is fixed with multiple lifting groups 211a arranged at intervals along the second direction Y, and each lifting group 211a includes multiple lifting members 211 arranged at intervals along the first direction X, and multiple lifting members 211 are arranged in an array in the horizontal plane. Along the second direction Y, multiple support groups 110a correspond to multiple lifting groups 211a one by one, and each lifting group 211a can move relative to the corresponding support group 110a along the first direction X. Specifically, the lifting group 211a has six groups corresponding to the six support groups 110a. The connecting frame 212 has one or multiple ones arranged at intervals along the second direction Y. Along the second direction Y, the connecting frame 212 is arranged between two adjacent lifting groups 211a, and each lifting member 211 in the two adjacent lifting groups 211a is fixed on the connecting frame 212. In this embodiment, the connection frame 212 is specifically provided with three spaced apart along the second direction Y, corresponding to the three transmission channels 102 one by one, and one set of jacking groups 211a is fixed on both sides of each connection frame 212, so that the six jacking groups 211a can be fixed on one of the connection frames 212. Each jacking member 211 and the corresponding connection frame 212 can be made in one piece, or made separately and then fixed together, so that all the jacking members 211 can move up and down or horizontally synchronously with the lifting frame 210, so as to realize the synchronous transmission of all battery cells 1 arranged in the array.

[0063] In other embodiments, when only two support groups 110a are provided on the rack 100, the lifting groups 211a also have two corresponding groups. In this case, only one transmission channel 102 may be provided on the rack 100, and the transmission channel 102 is provided between the two support groups 110a; accordingly, the lifting frame 210 only includes one connecting frame 212, and the connecting frame 212 is provided between the two lifting groups 211a and is fixed to each lifting member 211 on both sides.

[0064] In other embodiments, the string welding device may also be provided with only one set of support groups 110a and a corresponding set of lifting groups 211a, in which case the lifting frame 210 only includes a connecting frame 212, which is provided at one side of the lifting group 211a and fixed to all the lifting members 211. In this case, the transmission channel 102 may not be provided on the frame 100, and the connecting frame 212 is lifted and lowered directly from one side of the frame 100.

[0065] See also Figure 5As shown, in this embodiment, a plurality of connectors 2121 extending along the first direction X are fixedly provided on the upper portion of each connecting frame 212, and the plurality of connectors 2121 are arranged at intervals along the first direction X. Along the second direction Y, three lifting members 211 are fixedly provided on both sides of each connector 2121 respectively, that is, a total of six lifting members 211 are provided on each connector 2121, and these six lifting members 211 and the connector 2121 together form a "king" - shaped lifting unit. Each lifting unit can be integrally formed and then fixedly connected to the corresponding connecting frame 212, and each lifting unit can exactly support two battery wafers 1. The structure of the above - mentioned lifting unit is helpful for the large - scale production and rapid assembly of the entire lifting frame 210, and the integrally formed lifting unit has higher supporting strength.

[0066] See Figure 3 、 Figures 5 to 7 As shown, in this embodiment, each support member 110 has a first positioning structure; among two adjacent lifting members 211 along the first direction X, at least one lifting member 211 has a second positioning structure, one of the first positioning structure and the second positioning structure is a protrusion 2111, and the other is a groove 111. The protrusion 2111 protrudes in the horizontal direction, and the groove 111 is recessed in the horizontal direction. Each second positioning structure can cooperate with the first positioning structures of a plurality of different support members 110, and the plurality of different support members 110 are arranged at intervals along the first direction X. In this embodiment, specifically, the first positioning structure is a groove 111, and the second positioning structure is a protrusion 2111. In order to achieve more accurate positioning, two grooves 111 arranged at intervals along the second direction Y are provided on each support member 110, and on the first direction X, one side wall of each lifting member 211 facing the groove 111 has two protrusions 2111 arranged at intervals along the second direction Y. Thus, during the movement of the lifting frame 210, it can be ensured that each lifting member 211 moves up and down from an accurate position, improving the transmission accuracy of the battery wafer 1.

[0067] In some embodiments, an auxiliary positioning mechanism for the battery wafer 1, such as a gravity pressing block, a vacuum chuck, etc., can be further provided on each support member 110 and each lifting member 211, for further preventing the battery wafer 1 from shifting from the solder tape and ensuring the string soldering accuracy. These auxiliary positioning mechanisms are fixed or relatively stationary with respect to the corresponding support member 110 or lifting member 211, without relative movement, so the setting method is simple.

[0068] See Figures 8 to 11As shown, in this embodiment, four non-identical virtual horizontal planes are defined, namely, the first support surface 1001, the second support surface 1002, the first bottom surface 1003, and the second bottom surface 1004. Among them, the first support surface 1001 is higher than the first bottom surface 1003, and the second support surface 1002 is higher than the second bottom surface 1004. Specifically, the upper surfaces of the plurality of support members 110 are all located in the first support surface 1001, and the upper surfaces of the plurality of lifting members 211 are all located in the second support surface 1002; the lowest points of the lower surfaces of the plurality of support members 110 are located in the first bottom surface 1003, and the lowest points of the lower surfaces of the plurality of lifting members 211 are located in the second bottom surface 1004. In this embodiment, each support member 110 and the lifting member 211 are roughly regular cuboids, so the lower surfaces of all support members 110 are located in the first bottom surface 1003, and the lower surfaces of all lifting members 211 are located in the second bottom surface 1004.

[0069] See also Figures 8 to 11 As shown, in this embodiment, during the movement of the transmission frame 220 and the lifting frame 210, the lifting frame 210 has a first position, a second position, a third position and a fourth position relative to the frame 100. When the lifting frame 210 is in the first position, the second support surface 1002 is not higher than the first bottom surface 1003 (see Figure 8 ); When the lifting frame 210 is in the second position, the second bottom surface 1004 is not lower than the first supporting surface 1001 (see Fig. 9 ); When the lifting frame 210 is in the third position, the second bottom surface 1004 is not lower than the first supporting surface 1001 (see Fig.10 ); When the lifting frame 210 is in the fourth position, the second support surface 1002 is not higher than the first bottom surface 1003 (see Fig.11 ).

[0070] In this embodiment, when the lifting frame 210 moves from the first position to the second position, a plurality of lifting members 211 respectively pass through the support gaps 101 at the corresponding positions from bottom to top. When the lifting frame 210 moves from the second position to the third position, the lifting frame 210 moves along the first direction X, specifically from front to back. When the lifting frame 210 moves from the third position to the fourth position, a plurality of lifting members 211 respectively pass through the support gaps 101 at the corresponding positions from top to bottom. When the lifting frame 210 moves from the fourth position to the first position, the lifting frame 210 moves along the first direction X, specifically from back to front. In this way, the lifting frame 210 can cyclically move between the first position, the second position, the third position, the fourth position, and the first position in sequence, and in the process of the cyclic movement, all the battery cells 1 on the string welding device are transferred as a whole.

[0071] See also Figures 8 to 9As shown, in this embodiment, when the lifting frame 210 is converted from the first position to the second position, a lifting member 211 passes through each support gap 101. Thus, the lifting member 211 can lift all the battery cells 1 originally supported on the support member 110 for overall transportation.

[0072] See also Figures 8 to 11 As shown, in this embodiment, when the lifting frame 210 moves from the first position to the second position, at least part of the connecting frame 212 passes through the transmission channel 102 at the corresponding position from bottom to top; when the lifting frame 210 moves from the third position to the fourth position, at least part of the connecting frame 212 passes through the transmission channel 102 at the corresponding position from top to bottom. Further, when the lifting frame 210 moves from the second position to the third position, part of the connecting frame 212 moves in the transmission channel 102 at the corresponding position along the first direction X. Therefore, the setting of the transmission channel 102 provides a channel and guide for the overall movement of the lifting frame 210, so that the cyclic movement of the lifting frame 210 can be carried out in an orderly manner.

[0073] See also Figure 6 to Figure 7 As shown, in this embodiment, when the lifting frame 210 moves from the first position to the second position, each second positioning structure can pass through a first positioning structure at the corresponding position from bottom to top; when the lifting frame 210 moves from the third position to the fourth position, each second positioning structure can pass through another first positioning structure at the corresponding position from top to bottom. In this way, the coordination of the first positioning structure and the second positioning structure further improves the accuracy of the movement position of the lifting frame 210.

[0074] A method for transferring solar cell sheets based on the string welding device of this embodiment is specifically described below. The method can be used to transfer the cell sheet 1 from the first station to the second station at least. The first station and the second station are arranged at intervals in the horizontal direction, specifically in the first direction X, and the second station is located downstream of the first station. It should be noted that the first station and the second station are not clearly marked in the figure, which can be understood as the two being located on two different support members 110 in the same support group 110a, and the second station is located downstream of the first station.

[0075] See also Figures 8 to 11 As shown, the transmission method comprises the following steps in sequence:

[0076] S1, the battery cell 1 to be transferred is located at the first station, the lifting member 211 is located below the first station, and the lifting frame 210 is in the first position ( Figure 8 );

[0077] S2, the lifting member 211 moves upward and lifts the battery cell 1 to above the first station. At this time, the lifting frame 210 is in the second position ( Fig. 9 );

[0078] S3, the lifting member 211 moves in the horizontal direction and transfers the battery cell 1 to the top of the second station. At this time, the lifting frame 210 is in the third position ( Fig.10 );

[0079] S4, the lifting member 211 moves downward, so that the battery cell 1 falls on the second station, and the lifting member 211 continues to move downward to the bottom of the second station. At this time, the lifting frame 210 is in the fourth position ( Fig.11 );

[0080] S5, the lifting member 211 moves horizontally to the bottom of the first station, and the lifting frame 210 returns to the first position ( Figure 8 ), the movement of the lifting frame 210 completes one cycle, and then steps S1 to S4 are repeated.

[0081] The above steps illustrate the basic principles of the transmission method in this embodiment. Based on the above principles and the specific structure of the string welding equipment, the method can also be extended to simultaneously transmit two or more battery cells 1. For example, the transmission method can be used to transmit the first battery cell from the first station to the second station, and at the same time to transmit the second battery cell from the third station to the fourth station, and the second station is the same as or different from the third station. The first battery cell and the second battery cell are two battery cells 1 connected in series, and the distance between the first station and the second station is equal to the distance between the third station and the fourth station. At this time, the lifting member 211 includes a first lifting member and a second lifting member (not marked in the figure, specifically two lifting members 211 that can correspond to the first battery cell and the second battery cell respectively), and the first lifting member and the second lifting member move synchronously.

[0082] Based on the above transmission method, in step S1: the first battery cell is located at the first station, the second battery cell is located at the third station, the first lifting member is located below the first station, and the second lifting member is located below the third station;

[0083] In step S2: the first lifting member and the second lifting member move upward simultaneously, the first lifting member lifts the first battery cell to above the first station, and the second lifting member lifts the second battery cell to above the third station;

[0084] In step S3: the first lifting member and the second lifting member move in the horizontal direction at the same time, the first lifting member transfers the first battery cell to the top of the second station, and the second lifting member transfers the second battery cell to the top of the fourth station;

[0085] In step S4: the first lifting member and the second lifting member move downward simultaneously, so that the first battery cell falls on the second station and the second battery cell falls on the fourth station, the first lifting member continues to move downward to below the second station, and the second lifting member continues to move downward to below the fourth station;

[0086] In step S5: the first lifting member and the second lifting member move in the horizontal direction simultaneously, the first lifting member moves to below the first station, and the second lifting member moves to below the third station, and then steps S1 to S4 are repeated.

[0087] It should be noted that in the above step S3, the distance that the lifting member 211 moves in the horizontal direction can be set according to actual process requirements, and the lifting frame 210 can transfer each battery cell 1 forward along the first direction X by the spacing distance of one or more support members 110 in each cycle.

[0088] In this embodiment, the above-mentioned transmission method of the first battery cell and the second battery cell is applicable to any two battery cells 1 in the same battery string 11. In particular, the second station and the third station can be the same station, that is, in each cycle, the transmission starting point of the second battery cell is the transmission end point of the first battery cell. Further, in this embodiment, the above-mentioned transmission method is applicable to each battery string 11 on the string welding device, so that multiple battery cells 1 arranged in an array can be transmitted synchronously and orderly, and receive string welding processing in turn.

[0089] In summary, the solar cell string welding equipment and transmission method provided by the present invention can synchronously transmit multiple array-arranged solar cells 1. The solar cells 1 are stably supported during the entire string welding and transmission process, and are not prone to problems such as slippage and dislocation. During the transmission process, the lifting frame 210 performs a simple circular motion, and the control method is simple, which helps to improve the working efficiency and string welding accuracy of the entire string welding equipment.

[0090] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar cell string welding device, used for string welding a plurality of solar cells, wherein the plurality of solar cells are arranged in sequence along a first direction, wherein the first direction extends along a horizontal direction, and the string welding device comprises a frame and a transmission device, Features: The frame is fixed with a support member for supporting the battery sheet, and the support member has a plurality of support members arranged at intervals along the first direction, and a support gap is provided between each two adjacent support members; The transmission device comprises a lifting frame, the lifting frame is connected to the frame so as to be relatively movable along the first direction and along the up-down direction, a lifting member for supporting the battery sheet is fixed on the lifting frame, and the lifting member has a plurality of lifting members spaced apart along the first direction; The first supporting surface, the second supporting surface, the first bottom surface, and the second bottom surface are four virtual horizontal surfaces that are not completely the same. The first supporting surface is higher than the first bottom surface, and the second supporting surface is higher than the second bottom surface. The upper surfaces of the plurality of supporting members are all located in the first supporting surface, and the upper surfaces of the plurality of lifting members are all located in the second supporting surface. The lowest points of the lower surfaces of the plurality of supporting members are located in the first bottom surface, and the lowest points of the lower surfaces of the plurality of lifting members are located in the second bottom surface. The lifting frame has a first position, a second position, a third position and a fourth position relative to the frame, wherein: When the lifting frame is in the first position, the second supporting surface is not higher than the first bottom surface; When the lifting frame is in the second position, the second bottom surface is not lower than the first supporting surface; When the lifting frame is in the third position, the second bottom surface is not lower than the first supporting surface; When the lifting frame is in the fourth position, the second supporting surface is not higher than the first bottom surface; When the lifting frame moves from the first position to the second position, the plurality of lifting members pass through the support gaps at corresponding positions from bottom to top, respectively, and one lifting member passes through each support gap; When the lifting frame moves from the second position to the third position, the lifting frame moves along the first direction; When the lifting frame moves from the third position to the fourth position, the plurality of lifting members respectively pass through the support gaps at corresponding positions from top to bottom; When the lifting frame moves from the fourth position to the first position, the lifting frame moves along the first direction. The frame is fixedly provided with a plurality of support groups spaced apart along a second direction, the second direction extends along a horizontal direction, the second direction is perpendicular to the first direction, and each of the support groups comprises the plurality of support members spaced apart along the first direction; the lifting frame is fixedly provided with a plurality of jacking groups spaced apart along the second direction, each of the jacking groups comprises the plurality of jacking members spaced apart along the first direction; the plurality of support groups along the second direction correspond to the plurality of jacking groups one by one, and each of the jacking groups can move relative to the corresponding support group along the first direction; Each of the supporting members has a first positioning structure, and at least one of the two lifting members adjacent to each other along the first direction has a second positioning structure, one of the first positioning structure and the second positioning structure is a protrusion, and the other is a groove, the protrusion protrudes along the horizontal direction, and the groove is recessed along the horizontal direction; each of the second positioning structures can be matched with the first positioning structures of a plurality of different supporting members, and the plurality of different supporting members are arranged at intervals along the first direction; When the lifting frame moves from the first position to the second position, each of the second positioning structures can pass through one of the first positioning structures at the corresponding position from bottom to top; when the lifting frame moves from the third position to the fourth position, each of the second positioning structures can pass through another of the first positioning structures at the corresponding position from top to bottom; The transmission device also includes a transmission frame, which is connected to the frame so as to be able to move relative to the first direction, and the lifting frame is connected to the transmission frame so as to be able to move relative to the frame in the up-down direction. The transmission device also includes a first driving mechanism for driving the transmission frame to move relative to the first direction, and a second driving mechanism for driving the lifting frame to move relative to the frame in the up-down direction.

2. The solar cell string welding equipment according to claim 1, Features: The lifting frame includes a connecting frame, which extends along the first direction. The multiple lifting members are fixed on the connecting frame. The second direction is a horizontal direction perpendicular to the first direction. The connecting frame is arranged on one side of the multiple lifting members along the second direction. The connecting frame is arranged on one side of the multiple supporting members.

3. The solar cell string welding equipment according to claim 2, Features: The frame is provided with a transmission channel, the transmission channel extends along the first direction, the transmission channel is connected with the plurality of support gaps, the transmission channel is provided on one side of the plurality of support members in the second direction, and when the lifting frame moves from the first position to the second position, at least part of the connecting frame passes through the transmission channel from bottom to top; When the lifting frame moves from the third position to the fourth position, at least a portion of the connecting frame passes through the transmission channel from top to bottom.

4. The solar cell string welding equipment according to claim 3, Features: When the lifting frame moves from the second position to the third position, part of the connecting frame moves along the first direction in the transmission channel.

5. The solar cell string welding equipment according to claim 1, Features: The lifting frame includes a connecting frame extending along the first direction. The connecting frame is arranged between two adjacent lifting groups along the second direction. Each lifting member in the two adjacent lifting groups is fixed on the connecting frame.

6. The solar cell string welding equipment according to claim 5, Features: The connecting frame has one or a plurality of transmission channels spaced apart along the second direction, the frame is provided with one or more transmission channels, each of the transmission channels extends along the first direction, each of the transmission channels is arranged between two adjacent groups of support groups along the second direction, each of the transmission channels is connected to a plurality of adjacent support gaps, and each of the connecting frames can pass through the transmission channels at corresponding positions in the up and down directions.

7. The solar cell string welding equipment according to claim 1, Features: The width of each of the support members along the first direction is respectively equal, the width of each of the support gaps is respectively equal, and the width of each of the support gaps is smaller than the width of each of the support members.

8. A method for transferring a solar cell, for transferring a solar cell from a first station to a second station, wherein the first station and the second station are arranged horizontally spaced apart from each other. It is characterized in that The transmission method is performed using the solar cell string welding equipment according to any one of claims 1 to 7, and the transmission method comprises the following steps in sequence: S1, the battery cell to be transferred is located at the first station, and the lifting member is located below the first station; S2, the lifting member moves upward and lifts the battery cell to above the first station; S3, the lifting member moves in a horizontal direction and transfers the battery cell to above the second station; S4, the lifting member moves downward, so that the battery cell falls on the second station, and the lifting member continues to move downward to below the second station; S5. The lifting member moves horizontally to below the first workstation, and then steps S1 to S4 are repeated.

9. The solar cell transmission method according to claim 8, Features: The transmission method is used to transmit the first battery cell from the first station to the second station, and is also used to transmit the second battery cell from the third station to the fourth station, the second station is the same as or different from the third station, the first battery cell and the second battery cell are connected in series, the distance between the first station and the second station is equal to the distance between the third station and the fourth station, the lifting member includes a first lifting member and a second lifting member, and the first lifting member and the second lifting member move synchronously; In the step S1: the first battery cell is located at the first station, the second battery cell is located at the third station, the first lifting member is located below the first station, and the second lifting member is located below the third station; In step S2: the first lifting member and the second lifting member move upward simultaneously, the first lifting member lifts the first battery cell to above the first station, and the second lifting member lifts the second battery cell to above the third station; In step S3: the first lifting member and the second lifting member move in the horizontal direction simultaneously, the first lifting member transfers the first battery cell to above the second station, and the second lifting member transfers the second battery cell to above the fourth station; In step S4: the first lifting member and the second lifting member move downward simultaneously, so that the first battery cell falls on the second station and the second battery cell falls on the fourth station, the first lifting member continues to move downward to below the second station, and the second lifting member continues to move downward to below the fourth station; In the step S5: the first lifting member and the second lifting member move in the horizontal direction simultaneously, the first lifting member moves to below the first station, the second lifting member moves to below the third station, and then the steps S1 to S4 are repeated.

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