Carrying mechanism, stacking device, and stacking method

Abstract

The application provides a carrying mechanism, a stacking device and a stacking method. The carrying mechanism comprises a driving assembly, a mounting bracket, a first suction part and a second suction part. The first suction part and the second suction part are arranged side by side on the mounting bracket, and the mounting bracket is connected to the driving end of the driving assembly. The first suction part comprises at least two first suction assemblies arranged side by side at intervals, and the second suction part comprises at least two second suction assemblies arranged side by side at intervals. The driving assembly is configured to drive the movement of the mounting bracket, so as to drive each first suction assembly to suck and carry one battery piece respectively, and to drive each second suction assembly to suck and carry one pressing tool. The pressing tool is used to press the welding strip on the battery piece below after being carried by the carrying mechanism. The carrying mechanism provided by the application can simultaneously carry and stack at least two battery pieces and at least two pressing tools at one time, thereby improving the efficiency of battery string stacking.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module manufacturing, specifically a handling mechanism, a stacking device, and a stacking method. Background Technology

[0002] In the battery string production process, in order to ensure the welding strength between the solder ribbon and the battery cell, it is necessary to stack the press on the battery cell to press the solder ribbon on the battery cell firmly onto the battery cell.

[0003] The traditional stringing method is as follows: A first transport mechanism places the first half of the i-th group of solder ribbons onto the i-th cell at the solder ribbon placement position on the transport mechanism, while the second half of the i-th group of solder ribbons is placed at the cell placement position on the transport mechanism. Then, a second transport mechanism places the i-th clamping fixture onto the i-th cell to press the first half of the i-th group of solder ribbons onto the i-th cell, and places the (i+1)-th cell at the cell placement position on the transport mechanism. The transport mechanism then transports the (i+1)-th cell to the solder ribbon placement position. This process is repeated, allowing the solder ribbons and cells to be stacked sequentially on the transport mechanism to form a string of cells to be connected, with the solder ribbons on the upper side of the cells being pressed firmly by the clamping fixtures.

[0004] In the traditional stacking method, the second handling mechanism can only handle and place one battery cell and one fixture at a time, resulting in low handling efficiency. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a conveying mechanism, a stacking device, and a stacking method, the detailed technical solutions of which are as follows:

[0006] A conveying mechanism is used in a stacking and stringing device for solar cells and solder strips. The conveying mechanism includes a drive assembly, a mounting bracket, a first suction section, and a second suction section, wherein:

[0007] The first suction unit and the second suction unit are mounted side by side on the mounting bracket along the length of the mounting bracket, and the mounting bracket is connected to the drive end of the drive assembly.

[0008] The first suction unit includes at least two first suction components arranged side by side and spaced apart along the length of the mounting bracket; the second suction unit includes at least two second suction components arranged side by side and spaced apart along the length of the mounting bracket.

[0009] The drive assembly is configured to drive the mounting bracket to move so as to drive each first suction assembly to pick up and transport a battery cell, and to drive each second suction assembly to pick up and transport a press, which is used to press the solder strip onto the battery cell located below the solder strip after being lowered by the transport mechanism.

[0010] The handling mechanism provided in this application is equipped with at least two first suction components and at least two second suction components. This mechanism can simultaneously handle at least two battery cells and at least two clamping devices. Furthermore, because each of the first and second suction components is arranged side-by-side along the length of the mounting bracket (i.e., collinear), the mechanism can simultaneously lay and stack the suctioned battery cells and clamping devices along the length of the battery string to perform battery string stacking operations. Using the handling mechanism provided in this application for battery string stacking can improve the efficiency of battery string stacking.

[0011] In some embodiments, the number of first suction components and second suction components is the same.

[0012] Since the number of the first and second suction components is the same, the transport mechanism of this application can transport the same number of clamps and solar cells each time. This allows the transport mechanism to transport and stack a predetermined number of clamps one-to-one onto the current batch of solar cells, and to complete the placement of the same number of solar cells in the next batch. In other words, the transport mechanism of this application can stack a predetermined number of solar cells into strings in batches each time, further improving the stacking efficiency.

[0013] In some embodiments, the drive assembly includes a translation drive and a lifting drive, wherein the lifting drive is connected to the drive end of the translation drive and the mounting bracket is connected to the drive end of the lifting drive; the translation drive is used to drive the mounting bracket to translate, and the lifting drive is used to drive the mounting bracket to lift; or, the drive assembly includes a robotic arm, the mounting bracket is connected to the drive end of the robotic arm, and the robotic arm is used to drive the mounting bracket to rotate.

[0014] Two simple drive components are provided that enable flexible driving of the mounting bracket, and both drive components can flexibly adjust the position of the mounting bracket.

[0015] In some embodiments, the first suction assembly includes a first mounting plate and at least two first suction cups, wherein the first mounting plate is connected to a mounting bracket, and each first suction cup is spaced apart and mounted on the first mounting plate, and each first suction cup is used to adsorb a battery cell; the second suction assembly includes a second mounting plate and at least two second suction cups or at least two magnetic suction elements, wherein the second mounting plate is connected to a mounting bracket, and each second suction cup or magnetic suction element is spaced apart and mounted on the second mounting plate, and each second suction cup or magnetic suction element is used to adsorb a pressure device.

[0016] By configuring the first suction component to include at least two first suction cups, the at least two first suction cups can cooperate to adsorb a battery cell, thereby ensuring the stability of the adsorption of the battery cell and guaranteeing the accuracy of battery cell pickup. By configuring the second suction component to include at least two second suction cups or at least two magnetic suction components, the at least two second suction cups or at least two magnetic suction components can be configured to adsorb a pressure fixture, ensuring the accuracy of pressure fixture pickup.

[0017] In some embodiments, the mounting position of each first suction component in the length direction of the mounting bracket is adjustable, and the mounting position of each second suction component in the length direction of the mounting bracket is adjustable.

[0018] By making the mounting positions of each first suction component adjustable along the length of the mounting bracket, the spacing between the first suction components can be flexibly adjusted, enabling the conveying mechanism of this application to suction and convey battery cells of different sizes and spacings. Similarly, by making the mounting positions of each second suction component adjustable along the length of the mounting bracket, the spacing between the second suction components can be flexibly adjusted, enabling the conveying mechanism of this application to suction and convey clamps of different sizes and spacings.

[0019] In some embodiments, the mounting bracket is provided with oblong holes corresponding to each first suction component and each second suction component. The oblong holes extend along the length direction of the mounting bracket, and each first suction component and each second suction component are respectively installed in the corresponding oblong holes by fasteners.

[0020] A simple and easy-to-adjust installation method is provided, which enables rapid adjustment of the installation positions of each first suction component and each second suction component, and ensures the connection strength between the first suction component, the second suction component and the mounting bracket.

[0021] This application also provides a stacking device, which includes a conveying mechanism, a cell conveying mechanism, a press conveying mechanism, a first handling mechanism, and a second handling mechanism, wherein:

[0022] The conveying mechanism includes a conveying section, a first transfer section, and a second transfer section;

[0023] The conveying section includes a conveyor belt that conveys along a first direction, and the conveying section is provided with a cell placement area, a welding strip placement area and a stacking area in sequence along the first direction;

[0024] The first transfer section and the second transfer section are arranged sequentially along the first direction. The first transfer section includes n transfer mechanisms, and the second transfer section includes at least n-1 transfer mechanisms. Each transfer mechanism is arranged side by side below the conveying surface of the conveyor belt along the first direction. Each transfer mechanism is configured to extend upward beyond the conveying surface of the conveyor belt and to move along the first direction.

[0025] The first conveying mechanism is configured to lay the n sets of welding ribbons of the i-th batch one by one onto the n cells of the i-th batch carried in the welding ribbon placement area, wherein the front part of each set of welding ribbons is laid on the corresponding cell, and the rear part of each set of welding ribbons extends backward to the corresponding cell.

[0026] The cell conveying mechanism is configured to convey multiple cells, and the fixture conveying mechanism is configured to convey multiple fixtures;

[0027] The second transport mechanism adopts any of the above-described transport mechanisms. The second transport mechanism is configured to pick up n cells of the (i+1)th batch from the cell transport mechanism and pick up n pressure plates of the (i)th batch from the pressure plate transport mechanism, and lay the picked-up n cells of the (i+1)th batch to the cell placement area, and place the picked-up n pressure plates of the (i)th batch on the front portion of the n sets of solder ribbons of the (i)th batch located in the solder ribbon placement area.

[0028] The first transfer unit is configured to move cyclically between the cell placement area and the ribbon placement area. The n transfer mechanisms in the first transfer unit are respectively used to transport n cells of the (i+1)th batch in the cell placement area to the ribbon placement area.

[0029] The second transfer unit is configured to circulate between the ribbon placement area and the stacking area. At least n-1 transfer mechanisms in the second transfer unit correspond one-to-one with at least n-1 solar cells on the rear side of the i-th batch in the ribbon placement area. Each transfer mechanism in the second transfer unit is used to transport the corresponding solar cell, ribbon and fixture to the stacking area, and to stack the solar cells on each transfer mechanism onto the rear section of the adjacent ribbon in front, so as to form the i-th cell string segment in the stacking area.

[0030] The conveyor belt is configured to move forward each time to remove the (i-1)th battery string segment from the stacking area;

[0031] Where n≥2, i≥2.

[0032] The stacking device provided in this application has a first transport mechanism that can lay n sets of solder ribbons from the current batch onto n cells of the current batch located in the solder ribbon placement area. A second transport mechanism can simultaneously transport n fixtures from the current batch and n cells from the next batch, ensuring that the n fixtures from the current batch are laid onto the n sets of solder ribbons in the solder ribbon placement area, and the n cells from the next batch are laid into the cell placement area. This results in n stacking units composed of cells, solder ribbons, and fixtures in the solder ribbon placement area, and prepares the cells for the next stacking operation in the cell placement area. Subsequently, a second transfer unit moves the n stacking units out of the stacking area and stacks them into new cell string segments. The first transfer unit then moves the n cells from the next batch to the solder ribbon placement area. In other words, the stacking device of this application can stack n cells, n sets of solder ribbons, and n fixtures from one batch to form a cell string segment each time, while simultaneously storing the next batch of n cells, thereby improving stacking efficiency.

[0033] In some embodiments, the cell conveying mechanism and the fixture conveying mechanism are arranged side by side on the side of the conveying section along a first direction, with the output end of the cell conveying mechanism close to the output end of the fixture conveying mechanism; the first suction unit in the second transport mechanism is configured to pick up n cells of the (i+1)th batch from the output end of the cell conveying mechanism, while the second suction unit is configured to pick up n fixtures of the (i)th batch from the output end of the fixture conveying mechanism; the second transport mechanism is also configured to simultaneously transport the n cells of the (i+1)th batch and the n fixtures of the (i)th batch, such that the first suction unit places the n cells of the (i+1)th batch picked up in the cell placement area, while the second suction unit lays the n fixtures of the (i)th batch picked up one by one onto the n cells located in the ribbon placement area.

[0034] By arranging the cell conveying mechanism and the press conveying mechanism side by side along the first direction on the side of the conveying section, and making the output end of the cell conveying mechanism close to the output end of the press conveying mechanism, the second conveying mechanism can simultaneously pick up n cells and n presses, and simultaneously place the picked-up n cells and n presses on the n cells in the cell placement area and the solder ribbon placement area, respectively, thereby improving the stacking efficiency of the battery string.

[0035] In some embodiments, the output end of the cell conveying mechanism is close to the cell placement area, and the output end of the fixture conveying mechanism is close to the ribbon placement area.

[0036] Since the output end of the cell conveying mechanism is close to the cell placement area, the second handling mechanism can pick up cells from the output end of the cell conveying mechanism and place them in the cell placement area nearby, further improving the cell placement efficiency. Similarly, since the output end of the fixture conveying mechanism is close to the ribbon placement area, the second handling mechanism can pick up fixtures from the output end of the fixture conveying mechanism and place them on the cells located in the ribbon placement area nearby.

[0037] In some embodiments, the stacking device includes two second handling mechanisms for alternately picking up and placing the battery cells and the clamps.

[0038] Two secondary handling mechanisms are used to alternately pick up and place the battery cells and fixtures, further improving the stacking efficiency of the stacking device.

[0039] This application also provides a string stacking method, which is implemented by the string stacking apparatus described in any of the above claims, the string stacking method comprising:

[0040] The first transfer unit controls the transfer of n solar cells in the i-th batch from the solar cell placement area to the solder strip placement area;

[0041] The first conveying mechanism is controlled to lay the n sets of welding ribbons of the i-th batch onto the n cells of the i-th batch located in the welding ribbon placement area. The front part of each set of welding ribbons is laid on the corresponding cell, and the rear part of each set of welding ribbons extends backward to the corresponding cell.

[0042] The second handling mechanism is controlled to simultaneously lay out n solar cells of the (i+1)th batch and n pressure pieces of the ith batch, so that the n solar cells of the (i+1)th batch are laid out in the empty solar cell placement area, and the n pressure pieces of the ith batch are placed one-to-one on the front part of the n sets of solder ribbons of the ith batch located in the solder ribbon placement area, so as to form n stacked units composed of solar cells, solder ribbons and pressure pieces in the solder ribbon placement area;

[0043] The control and conveying unit forward transports the (i-1)th battery string segment from the stacking area out of the stacking area;

[0044] The second transfer unit controls the n stacking units in the ribbon placement area to the empty stacking area and stacks them, so that the cells of the later stacking unit are stacked on the rear section of the ribbon of the earlier stacking unit to form the i-th battery string segment in the stacking area.

[0045] The first transfer unit controls the transfer of n solar cells from the (i+1)th batch in the solar cell placement area to the vacated solder strip placement area;

[0046] Where n≥2, i≥2.

[0047] The stacking method provided in this application firstly places n sets of solder ribbons and n clamping fixtures one-to-one onto the n cells of the current batch located in the solder ribbon placement area, thereby obtaining n stacking units. Simultaneously, the next batch of n cells is stored in the cell placement area. Then, the n stacking units are moved out of the stacking area and stacked into new cell string segments. The next batch of n cells is then moved to the solder ribbon placement area to await the placement of solder ribbons and clamping fixtures. In other words, the stacking method of this application can stack n cells, n sets of solder ribbons, and n clamping fixtures of a batch to form a cell string segment each time, while simultaneously storing the next batch of n cells, thereby improving stacking efficiency. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the transport mechanism in the embodiments of this application;

[0049] Figure 2 This is a schematic diagram of the structure of the first suction section and the second suction section in the embodiments of this application;

[0050] Figure 3 This is a schematic diagram of the stacking device in the embodiments of this application from a first perspective;

[0051] Figure 4 This is a schematic diagram of the stacking device in the embodiments of this application from a second perspective;

[0052] Figure 5 This is a schematic diagram of the conveying mechanism in the embodiments of this application;

[0053] Figure 6 A schematic diagram of a conveying mechanism carrying battery cells, welding strips and a press in an embodiment of this application;

[0054] Figure 7 This is a schematic diagram of the stacking process of the stacking device in one embodiment of this application.

[0055] Figures 1 to 7 Includes:

[0056] Drive component 1: translation drive unit 11, lifting drive unit 12;

[0057] Mounting bracket 2;

[0058] First suction unit 3: First suction assembly 31, first mounting plate 311, first suction cup 312;

[0059] Second suction unit 4: Second suction assembly 41, second mounting plate 411, magnetic suction element 412;

[0060] Conveying mechanism 10: Conveying section 101, first transfer section 102, second transfer section 103, transfer mechanism 104, conveyor belt 1011;

[0061] Cell delivery mechanism 20;

[0062] Press conveying mechanism 30;

[0063] First transport mechanism 40;

[0064] Second handling mechanism 50;

[0065] Cell placement area A, solder ribbon placement area B, and stacking area C;

[0066] 100 solar cells, 200 welding strips, 300 pressing fixtures;

[0067] The first battery string segment is 501, the second battery string segment is 502, and the third battery string segment is 503. Detailed Implementation

[0068] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0069] As described in the background section, in traditional stacking methods, the second handling mechanism can only handle and place one cell and one fixture at a time, resulting in low handling efficiency.

[0070] To address this problem, this application provides a handling mechanism applied in a stacking device for solar cells and solder strips. A stacking device refers to a device that stacks solar cells and solder strips into strings according to the rules for stringing solar cells.

[0071] like Figures 1 to 2 As shown, the conveying mechanism in this embodiment includes a drive assembly 1, a mounting bracket 2, a first suction part 3, and a second suction part 4, wherein:

[0072] The first suction unit 3 and the second suction unit 4 are mounted side by side on the mounting bracket 2 along the length direction of the mounting bracket 2 (as shown by the arrow in the figure), and the mounting bracket 2 is connected to the drive end of the drive assembly 1.

[0073] The first suction unit 3 includes at least two first suction components 31 arranged side by side and spaced apart along the length direction of the mounting bracket 2, and the second suction unit 4 includes at least two second suction components 41 arranged side by side and spaced apart along the length direction of the mounting bracket 2.

[0074] The drive assembly 1 is configured to drive the mounting bracket 2 to move so as to drive each first suction assembly 31 to pick up and transport a battery cell, and to drive each second suction assembly 41 to pick up and transport a press, which is used to press the welding strip onto the battery cell located below the welding strip after being lowered by the transport mechanism.

[0075] Since the mounting bracket 2 is equipped with at least two first suction components 31 and at least two second suction components 41, the transport mechanism in this embodiment can simultaneously transport at least two battery cells and at least two clamps. Furthermore, because each first suction component 31 and each second suction component 32 is arranged side-by-side along the length of the mounting bracket 2 (i.e., collinear), the transport mechanism can simultaneously lay and stack the suctioned battery cells and clamps along the length of the battery string. Using the transport mechanism provided in this application to stack battery strings can improve the stacking efficiency.

[0076] During the stacking process, the transport mechanism can simultaneously control the first suction component 31 and the second suction component 41 to transport and place the picked-up battery cells and fixtures. Of course, for the battery cell and fixture retrieval operations before transport, the transport mechanism can simultaneously pick up the battery cells and fixtures, or it can first control the first suction component 31 to pick up the battery cells, and then control the second suction component 41 to pick up the fixtures. Alternatively, the transport mechanism can first control the second suction component 41 to pick up the fixtures, and then control the first suction component 31 to pick up the battery cells.

[0077] Optionally, the number of the first suction component 31 and the second suction component 41 are the same, for example... Figure 1 and Figure 2 In the illustrated embodiment, both the first suction component 31 and the second suction component 41 are provided in sets of three. In other embodiments, the number of the first suction component 31 and the second suction component 41 may also be provided in sets of two, four, five or more.

[0078] Since the number of first suction components 31 and second suction components 41 is the same, the transport mechanism in this embodiment can transport the same number of clamps and battery cells each time. Thus, the transport mechanism in this embodiment can transport and stack a target number (e.g., 3) of clamps one-to-one onto the current batch of battery cells, and can also complete the placement of the same number of battery cells in the next batch. In other words, the transport mechanism in this embodiment can stack the target number of battery cells into strings in batches each time, thereby improving stacking efficiency.

[0079] like Figure 1As shown, optionally, the drive assembly 1 includes a translation drive unit 11 and a lifting drive unit 12, wherein the lifting drive unit 12 is connected to the drive end of the translation drive unit 11, and the mounting bracket 2 is connected to the drive end of the lifting drive unit 12. The translation drive unit 11 is used to drive the mounting bracket 2 to translate, and the lifting drive unit 12 is used to drive the mounting bracket 2 to lift.

[0080] As can be seen, through the coordinated drive of the translation drive unit 11 and the lifting drive unit 12, the drive assembly 1 can drive the mounting bracket 2 to perform translation and lifting, thereby enabling the first suction assembly 31 and the second suction assembly 41 to respectively pick up, transport, and place the battery cells and the clamp. The translation drive unit 11 and the lifting drive unit 12 can adopt various existing linear drive modules, such as lead screw drive modules, synchronous belt drive modules, etc.

[0081] Of course, the drive assembly 1 can also adopt other mechanisms that can drive the mounting bracket 2 to move. For example, in another embodiment, the drive assembly 1 includes a robotic arm, and the mounting bracket 2 is connected to the drive end of the robotic arm. The robotic arm is used to drive the mounting bracket to rotate, including rotation in the horizontal or vertical direction.

[0082] like Figure 2 As shown, optionally, the first suction assembly 31 includes a first mounting plate 311 and at least two (e.g., Figure 2 The system comprises four first suction cups 312, wherein a first mounting plate 311 is connected to a mounting bracket 2, and each first suction cup 312 is spaced apart and mounted on the first mounting plate 311. Each first suction cup 312 is used to adsorb one battery cell. At least two first suction cups 312 working together to adsorb one battery cell can ensure the stability of the adsorption of the battery cell and guarantee the accuracy of battery cell pickup.

[0083] The clamping device in this embodiment can be any existing clamping device capable of pressing the solder strip assembly onto the battery cell. For example, the clamping device includes a mounting plate and several rows of clamping pins disposed on the mounting plate. Each row of clamping pins is used to press one solder strip from the solder strip assembly onto the battery cell below. The number of rows of clamping pins is the same as the number of solder strips in the solder strip assembly. The mounting plate of the clamping device is typically made of a metal that can be attracted by a magnet. Optionally, the second suction assembly 41 includes a second mounting plate 411 and at least two (e.g., Figure 2 The device comprises two magnetic suction components 412, wherein the second mounting plate 411 is connected to the mounting bracket 2, and each magnetic suction component 412 is spaced apart and mounted on the second mounting plate 411. Each magnetic suction component 412 is used to attract and hold the mounting plate of a pressure fixture. Optionally, the magnetic suction component 412 is an electromagnet, and the attraction and release of the pressure fixture can be achieved by turning the electromagnet on and off. Of course, the magnetic suction component 412 can also be replaced with a suction cup, with at least two suction cups used to attract and hold the mounting plate of a pressure fixture.

[0084] By configuring the second suction component to include at least two magnetic suction elements 412 or suction cups, the at least two magnetic suction elements 412 or suction cups can cooperate to adsorb a pressure fixture, thus ensuring the accuracy of pressure fixture pickup.

[0085] Optionally, the mounting position of each first suction component 31 in the length direction of the mounting bracket 2 is adjustable, and the mounting position of each second suction component 41 in the length direction of the mounting bracket 2 is adjustable.

[0086] Since the installation position of each first suction component 31 in the length direction of the mounting bracket 2 is adjustable, the spacing of the first suction components 31 can be adjusted by adjusting the installation position of each first suction component 31, thereby enabling the first suction part 3 of the conveying mechanism in this embodiment to perform suction and conveying of battery cells of different sizes and different spacings.

[0087] Similarly, since the installation position of each second suction component 41 in the length direction of the mounting bracket 2 is adjustable, the spacing of the second suction components 41 can be adjusted by adjusting the installation position of the second suction components 41, thereby enabling the second suction part 4 of the conveying mechanism in this embodiment to perform suction and conveying of presses of different sizes and different spacings.

[0088] Optionally, the mounting bracket 2 is provided with waist-shaped holes corresponding to each first suction component 31 and each second suction component 41. The waist-shaped holes extend along the length direction of the mounting bracket 2, and each first suction component 31 and each second suction component 41 are respectively installed in the corresponding waist-shaped holes by fasteners.

[0089] Fasteners, such as bolts, are provided on the fixing parts of the first suction assembly 31 and the second suction assembly 41 (e.g., the aforementioned first mounting plate 311 and second mounting plate 411), which are provided with screw holes corresponding to the oblong holes. The bolts pass through the corresponding oblong holes and are screwed into the screw holes. When it is necessary to adjust the position of the first suction assembly 31 or the second suction assembly 41, the bolts are first loosened to release the first suction assembly 31 or the second suction assembly 41. After the position adjustment of the first suction assembly 31 or the second suction assembly 41 is completed, the bolts are retightened so that the bolts press and fix the first suction assembly 31 or the second suction assembly 41 onto the mounting bracket 2 again.

[0090] This application also provides a stacking device, such as... Figures 3 to 6 As shown, the stacking device in this embodiment includes a conveying mechanism 10, a cell conveying mechanism 20, a press conveying mechanism 30, a first handling mechanism 40, and a second handling mechanism 50, wherein:

[0091] The conveying mechanism 10 includes a conveying section 101, a first transfer section 102, and a second transfer section 103.

[0092] The conveying section 10 includes a conveyor belt 1011 that conveys along a first direction (such as the X direction). The conveying section 10 is provided with a cell placement area A, a solder strip placement area B and a stacking area C in sequence along the first direction.

[0093] The first transfer section 102 and the second transfer section 103 are arranged sequentially along a first direction. The first transfer section 102 includes n (e.g., 3 in the figure) transfer mechanisms 104, and the second transfer section 103 includes at least n-1 (e.g., 2 in the figure) transfer mechanisms 104. Each transfer mechanism 104 is arranged side by side below the conveying surface of the conveyor belt 1011 along the first direction. Each transfer mechanism 104 is configured to extend upward beyond the conveying surface of the conveyor belt 1011 and to move along the first direction.

[0094] The first conveying mechanism 40 is configured to lay the n sets of welding ribbons of the i-th batch one by one onto the n cells of the i-th batch carried by the welding ribbon placement area B, wherein the front part of each set of welding ribbons is laid on the corresponding cell, and the rear part of each set of welding ribbons extends backward to the corresponding cell.

[0095] The cell conveying mechanism 20 is configured to convey multiple cells, and the fixture conveying mechanism 30 is configured to convey multiple fixtures.

[0096] The second transport mechanism 50 adopts the transport mechanism in any of the above embodiments. The second transport mechanism 50 is configured to pick up n cells of the (i+1)th batch from the cell transport mechanism 20, and pick up n pressure plates of the (i)th batch from the pressure plate transport mechanism 30, and lay the picked-up n cells of the (i+1)th batch to the cell placement area A, and place the picked-up n pressure plates of the (i)th batch on the front part of the n groups of solder ribbons of the (i)th batch located in the solder ribbon placement area B.

[0097] The first transfer unit 102 is configured to move cyclically between the cell placement area A and the ribbon placement area B. The n transfer mechanisms 104 in the first transfer unit 102 are respectively used to transport n cells of the (i+1)th batch in the cell placement area A to the ribbon placement area B.

[0098] The second transfer unit 103 is configured to cyclically move between the ribbon placement area B and the stacking area C. At least n-1 transfer mechanisms 104 in the second transfer unit 103 correspond one-to-one with at least n-1 battery cells on the rear side of the i-th batch in the ribbon placement area B. Each transfer mechanism 104 in the second transfer unit 103 is used to transport the corresponding battery cell, ribbon and fixture to the stacking area, and to stack the battery cells on each transfer mechanism 104 onto the rear section of the adjacent ribbon in front, so as to form the i-th battery string segment in the stacking area C.

[0099] The conveyor belt 1011 is configured to move forward each time to remove the (i-1)th battery string segment from the stacking area C.

[0100] Where n≥2, i≥2.

[0101] As can be seen, in the stacking device of this application embodiment, the first transport mechanism 40 can lay the n sets of solder ribbons of the current batch one by one onto the n cells of the current batch located in the solder ribbon placement area B. The second transport mechanism 50 can simultaneously transport the n fixtures of the current batch and the n cells of the next batch, so that the n fixtures of the current batch are laid one by one onto the n sets of solder ribbons of the current batch located in the solder ribbon placement area B, and the n cells of the next batch are laid into the cell placement area A. Thus, n stacking units composed of cells, solder ribbons and fixtures are obtained in the solder ribbon placement area B, and the cells to be stacked next are prepared in the cell placement area A. Then, the second transfer unit 103 moves the n stacking units out of the stacking area C and stacks them into new cell string segments, and the first transfer unit 102 moves the n cells of the next batch to the solder ribbon placement area. In other words, the stacking device in this application embodiment can stack n battery cells, n sets of solder ribbons and n fixtures in a batch to form a battery string segment each time, while storing the next batch of n battery cells, thereby improving the stacking efficiency.

[0102] To enable those skilled in the art to more clearly understand the technical solution of the stacking device in the embodiments of this application, the following will take n=2 as an example, that is, the first transfer part 102 includes 2 transfer mechanisms 104 and the second transfer part 103 includes 1 transfer mechanism 104, in combination with Figure 7 The optional stacking process of the stacking device in the embodiments of this application is described by way of example.

[0103] like Figure 7 As shown in (a), the second transfer unit 103 stacks two battery cells 100 from the first batch and the solder ribbon in the stacking area C to form a first battery string segment 501. Simultaneously, the two transfer mechanisms 104 of the first transfer unit 102 transport two battery cells 100 from the battery cell placement area A to the solder ribbon placement area B, such that the foremost battery cell (i.e., closest to the first battery string segment 501) is stacked on the rear portion of the adjacent solder ribbon 200 (i.e., the tail solder ribbon of the first battery string segment 501). Furthermore, during the transport process, the two transfer mechanisms 104 of the first transfer unit 102 adjust the spacing to create a larger gap between the battery cells 100 on the two transfer mechanisms 104, providing space for subsequent solder ribbon placement.

[0104] It should be noted that before the two battery cells of the first batch are stacked into the first battery string segment 501, they also need to be transported from the battery cell placement area A to the solder strip placement area B by the two transfer mechanisms 104 of the first transfer unit 102.

[0105] like Figure 7 As shown in (b), the first transport mechanism 40 lays the two sets of solder ribbons 200 of the second batch onto the two solar cells 100 of the second batch located in the solder ribbon placement area B, with the front portion of each set of solder ribbons 200 laid on the corresponding solar cell 100 and the rear portion of each set of solder ribbons 200 extending backward from the corresponding solar cell 100. Simultaneously, the second transfer unit 103 moves from the stacking area C back to the solder ribbon placement area B, and the first transfer unit 102 moves from the solder ribbon placement area B back to the solar cell placement area A. After moving back to the solder ribbon placement area B, one transfer mechanism 104 of the second transfer unit 103 is located directly below the rear solar cell 100 of the two solar cells 100 in the second batch. During the translation process, the two transfer mechanisms 104 in the first transfer unit 102 adjust their spacing to ensure that the two transfer mechanisms 104 moving back to the solar cell placement area A have a small gap. Setting the spacing of the transfer mechanism 104 in the cell placement area A to be smaller can shorten the overall size of the conveying mechanism 10 in the first direction and facilitate the cell placement by the second handling mechanism 50.

[0106] like Figure 7 As shown in (c), the second transport mechanism 50 simultaneously transports and lays two clamps 300 of the second batch and two solar cells 100 of the third batch, and places the two clamps 300 of the second batch one-to-one on the front part of the two sets of welding ribbons 200 of the second batch located in the welding ribbon placement area B, thereby forming two stacking units composed of solar cells 100, welding ribbons 200 and clamps 300 in the welding ribbon placement area B, while laying the two solar cells 100 of the third batch in the solar cell placement area A.

[0107] In order to simultaneously transport and lay two solar cells 100 and two presses 300, the second transport mechanism 50 optionally includes a first suction unit 3 comprising two first suction components 31 and a second suction unit 4 comprising two second suction components 41.

[0108] like Figure 7As shown in (d), one transfer mechanism 104 of the second transfer unit 103 extends upward from the conveyor surface of the conveyor belt 1011, thereby lifting one of the rearmost of the two stacked units located in the solder strip placement area B out of the conveyor surface of the conveyor belt 1011. Furthermore, the two transfer mechanisms 104 of the first transfer unit 102 extend upward from the conveyor surface of the conveyor belt 1011, thereby correspondingly lifting two solar cells 100 of the third batch located in the solar cell placement area A out of the conveyor surface of the conveyor belt 1011.

[0109] like Figure 7 As shown in (e), the conveyor belt 1011 moves forward, thereby removing the first battery string segment 501 located in the stacking area C from the stacking area C. Since the foremost stacking unit in the ribbon placement area B is not lifted off the conveyor surface of the conveyor belt 1011, this stacking unit is simultaneously conveyed forward by the conveyor belt 1011 along with the first battery string segment 501. At the same time, a transfer mechanism 104 of the second transfer unit 103 transports a stacking unit located on the rear side of the ribbon placement area B to the vacated stacking area C and stacks it, so that the battery cells of this stacking unit are stacked on the rear portion of the ribbon of the preceding stacking unit, thereby forming the second battery string segment 502 in the stacking area C.

[0110] Meanwhile, the two transfer mechanisms 104 of the first transfer unit 102 transport two solar cells 100 of the third batch located in the solar cell placement area A to the empty solder ribbon placement area B. During the transport process, the two transfer mechanisms 104 of the first transfer unit 102 adjust the spacing to create a larger gap between the solar cells 100 on the two transfer mechanisms 104, in order to leave space for subsequent solder ribbon laying. Alternatively, one transfer mechanism 104 of the second transfer unit 103 can transport one stacking unit located on the rear side of the solder ribbon placement area B to the empty stacking area C. After stacking is completed, the two transfer mechanisms 104 of the first transfer unit 102 then transport the two solar cells 100 of the third batch located in the solar cell placement area A to the empty solder ribbon placement area B.

[0111] like Figure 7As shown in (f), the first transport mechanism 30 lays the two sets of solder ribbons 200 of the third batch onto the two solar cells 100 of the third batch located in the solder ribbon placement area B, with the front portion of each set of solder ribbons 200 laid on the corresponding solar cell 100 and the rear portion of each set of solder ribbons 200 extending backward from the corresponding solar cell 100. Simultaneously, the second transfer unit 103 moves from the stacking area C back to the solder ribbon placement area B, and the first transfer unit 102 moves from the solder ribbon placement area B back to the solar cell placement area A. After moving back to the solder ribbon placement area B, one transfer mechanism 104 of the second transfer unit 103 is located directly below the rear solar cell 100 of the two solar cells 100 in the third batch. During the translation process, the two transfer mechanisms 104 in the first transfer unit 102 adjust their spacing to ensure a small gap between the two transfer mechanisms 104 moving back to the solar cell placement area A.

[0112] like Figure 7 As shown in (g), the second transport mechanism 50 simultaneously transports and lays two presses 300 of the third batch and two solar cells 100 of the fourth batch, and places the two presses 300 of the third batch one-to-one on the front part of the two sets of welding ribbons 200 of the third batch located in the welding ribbon placement area B, thereby forming two stacking units composed of solar cells 100, welding ribbons 200 and presses 300 in the welding ribbon placement area B, while laying the two solar cells 100 of the fourth batch in the solar cell placement area A.

[0113] like Figure 7 As shown in (h), one transfer mechanism 104 of the second transfer unit 103 extends upward from the conveyor surface of the conveyor belt 1011, thereby lifting one of the rearmost of the two stacked units located in the solder strip placement area B out of the conveyor surface of the conveyor belt 1011. Furthermore, the two transfer mechanisms 104 of the first transfer unit 102 extend upward from the conveyor surface of the conveyor belt 1011, thereby correspondingly lifting two solar cells 100 of the fourth batch located in the solar cell placement area A out of the conveyor surface of the conveyor belt 1011.

[0114] like Figure 7 As shown in (i), the conveyor belt 1011 moves forward, thereby removing the second battery string segment 502 located in the stacking area C from the stacking area C. Since the foremost stacking unit in the ribbon placement area B is not lifted off the conveyor surface of the conveyor belt 1011, this stacking unit is simultaneously conveyed forward by the conveyor belt 1011 along with the second battery string segment 502. At the same time, a transfer mechanism 104 of the second transfer unit 103 transports a stacking unit located on the rear side of the ribbon placement area B to the vacated stacking area C and stacks it, so that the battery cells of this stacking unit are stacked on the rear portion of the ribbon of the preceding stacking unit, thereby forming the third battery string segment 503 in the stacking area C.

[0115] Meanwhile, the two transfer mechanisms 104 of the first transfer unit 102 transport two solar cells 100 of the fourth batch located in the solar cell placement area A to the empty solder ribbon placement area B. During the transport process, the two transfer mechanisms 104 of the first transfer unit 102 adjust the spacing to create a larger gap between the solar cells 100 on the two transfer mechanisms 104, leaving space for subsequent solder ribbon laying. Alternatively, one transfer mechanism 104 of the second transfer unit 103 can transport one stacking unit located on the rear side of the solder ribbon placement area B to the empty stacking area C. After stacking is completed, the two transfer mechanisms 104 of the first transfer unit 102 then transport the two solar cells 100 of the fourth batch located in the solar cell placement area A to the empty solder ribbon placement area B.

[0116] The process is repeated so that the welding strip 200 and the battery cell 100 are stacked sequentially on the conveying section 101 of the conveying mechanism 10 to form a battery string to be connected in series.

[0117] like Figures 3 to 4 As shown, optionally, the cell conveying mechanism 20 and the fixture conveying mechanism 30 are arranged side by side along the first direction on the side of the conveying section 101, with the output end 201 of the cell conveying mechanism 20 close to the output end 301 of the fixture conveying mechanism 30. The first suction unit 3 in the second transport mechanism 50 is configured to pick up n cells of the (i+1)th batch from the output end 201 of the cell conveying mechanism 20, while the second suction unit 4 is configured to pick up n fixtures of the (i)th batch from the output end 301 of the fixture conveying mechanism 30. The second transport mechanism 50 is also configured to transport the n cells of the (i+1)th batch and the n fixtures of the (i)th batch simultaneously, such that the first suction unit 3 places the n cells of the (i+1)th batch picked up in the cell placement area A, while the second suction unit 4 places the n fixtures of the (i)th batch picked up one by one onto the n cells located in the ribbon placement area B.

[0118] By arranging the cell conveying mechanism 20 and the fixture conveying mechanism 30 side by side along the first direction on the side of the conveying section 101, and making the output end 201 of the cell conveying mechanism 20 close to the output end 301 of the fixture conveying mechanism 30, the second conveying mechanism 50 can simultaneously pick up n cells and n fixtures, and simultaneously place the picked-up n cells and n fixtures on the n cells in the cell placement area A and the solder ribbon placement area B, thereby improving the stacking efficiency of the battery string.

[0119] like Figure 4 As shown, optionally, the output end 201 of the cell conveying mechanism 20 is close to the cell placement area A, and the output end 301 of the press conveying mechanism 30 is close to the welding strip placement area B.

[0120] Since the output end 201 of the cell conveying mechanism 20 is close to the cell placement area A, the second handling mechanism 50 can pick up the cells from the output end 201 of the cell conveying mechanism 20 and place them nearby in the cell placement area A, further improving the cell placement efficiency. Similarly, since the output end of the fixture conveying mechanism 30 is close to the ribbon placement area B, the second handling mechanism 50 can pick up the fixture from the output end 301 of the fixture conveying mechanism 30 and place the fixture nearby on the cells located in the ribbon placement area B.

[0121] like Figures 3 to 4 As shown, optionally, the stacking device in this embodiment includes two second transport mechanisms 50, which are used to alternately pick up and place the battery cells and the clamping fixture. This can further improve the stacking efficiency of the stacking device in this embodiment.

[0122] Based on the same concept, this application also provides a string stacking method, which is implemented by the string stacking device in any of the above embodiments. The string stacking method in the embodiments of this application includes:

[0123] Step S1: Control the first transfer unit 102 to transport the n cells of the i-th batch from the cell placement area A to the ribbon placement area B.

[0124] Step S2: Control the first conveying mechanism 40 to lay the n sets of welding ribbons of the i-th batch one by one onto the n cells of the i-th batch located in the welding ribbon placement area B. The front part of each set of welding ribbons is laid on the corresponding cell, and the rear part of each set of welding ribbons extends backward to the corresponding cell.

[0125] Step S3: Control the second transport mechanism 50 to simultaneously lay out the n cells of the (i+1)th batch and the n fixtures of the i-th batch, so that the n cells of the (i+1)th batch are laid out in the empty cell placement area A, and the n fixtures of the i-th batch are placed one by one on the front part of the n sets of solder ribbons of the i-th batch located in the solder ribbon placement area B, so as to form n stacked units composed of cells, solder ribbons and fixtures in the solder ribbon placement area.

[0126] Step S4: The control conveying unit 101 conveys the (i-1)th battery string segment from the stacking area forward out of the stacking area C.

[0127] Step S5: Control the second transfer unit 103 to transport the n stacking units in the solder ribbon placement area to the empty stacking area C and stack them, so that the battery cells of the later stacking unit are stacked on the rear section of the solder ribbon of the earlier stacking unit to form the i-th battery string segment in the stacking area C.

[0128] Step S6: Control the first transfer unit 102 to move the n solar cells of the (i+1)th batch in the solar cell placement area to the empty solder strip placement area B.

[0129] Where n≥2, i≥2.

[0130] Steps S4, S5, and S6 can be executed simultaneously. Alternatively, steps S4 and S5 can be executed simultaneously, followed by step S6.

[0131] As can be seen, the stacking method provided in this application firstly places n sets of solder ribbons and n clamping fixtures one-to-one onto the n cells of the current batch located in the solder ribbon placement area B, thereby obtaining n stacking units. Simultaneously, the next batch of n cells is stored in the cell placement area A. Then, the n stacking units are moved out of the stacking area C and stacked into new cell string segments. The next batch of n cells is then moved to the solder ribbon placement area C to await the placement of solder ribbons and clamping fixtures. In other words, the stacking method of this application can stack a batch of n cells, n sets of solder ribbons, and n clamping fixtures to form a cell string segment each time, while simultaneously storing the next batch of n cells, thereby improving stacking efficiency.

[0132] This application provides a sufficiently detailed and specific description. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within its protection scope. The scope of protection claimed in this application is defined by the claims, not by the above descriptions in the embodiments. Without contradiction, some optional components in one embodiment can also be used in another embodiment, and some preferred structures of the same component in one embodiment are also applicable to another embodiment. Furthermore, there may be slight differences in the wording of the names of certain components in different embodiments; these slight differences will not affect the understanding of the technical solution of the present invention by those skilled in the art.

Claims

1. A conveying mechanism, characterized in that, In a stacking and stringing device for solar cells and solder strips, the conveying mechanism includes a drive assembly, a mounting bracket, a first suction section, and a second suction section, wherein: The first suction part and the second suction part are mounted side by side on the mounting bracket along the length direction of the mounting bracket, and the mounting bracket is connected to the drive end of the drive assembly; The first suction unit includes at least two first suction components arranged side by side and spaced apart along the length direction of the mounting bracket; the second suction unit includes at least two second suction components arranged side by side and spaced apart along the length direction of the mounting bracket. The drive assembly is configured to drive the mounting bracket to move, thereby causing each of the first suction components to respectively pick up and transport a battery cell, and to cause each of the second suction components to respectively pick up and transport a press, wherein the press, after being lowered by the transport mechanism, is used to press the welding strip onto the battery cell located below the welding strip.

2. The conveying mechanism as described in claim 1, characterized in that, The number of the first suction components is the same as the number of the second suction components.

3. The conveying mechanism as described in claim 1, characterized in that, The drive assembly includes a translation drive unit and a lifting drive unit, wherein the lifting drive unit is connected to the drive end of the translation drive unit, and the mounting bracket is connected to the drive end of the lifting drive unit; the translation drive unit is used to drive the mounting bracket to translate, and the lifting drive unit is used to drive the mounting bracket to lift; or... The drive assembly includes a robotic arm, and the mounting bracket is connected to the drive end of the robotic arm. The robotic arm is used to drive the mounting bracket to rotate.

4. The conveying mechanism as described in claim 1, characterized in that: The first suction assembly includes a first mounting plate and at least two first suction cups, wherein the first mounting plate is connected to the mounting bracket, and each first suction cup is mounted on the first mounting plate at intervals, and each first suction cup is used to adsorb a battery cell; The second suction assembly includes a second mounting plate and at least two second suction cups or at least two magnetic suction components. The second mounting plate is connected to the mounting bracket, and each of the second suction cups or magnetic suction components is spaced apart on the second mounting plate. Each of the second suction cups or magnetic suction components is used to cooperate in adsorbing a pressure fixture.

5. The conveying mechanism as described in claim 1, characterized in that: The mounting position of each of the first suction components in the length direction of the mounting bracket is adjustable, and the mounting position of each of the second suction components in the length direction of the mounting bracket is adjustable.

6. The conveying mechanism as described in claim 1, characterized in that: The mounting bracket is provided with waist-shaped holes corresponding to each of the first suction components and each of the second suction components. The waist-shaped holes extend along the length direction of the mounting bracket, and each of the first suction components and each of the second suction components is installed in the corresponding waist-shaped holes by fasteners.

7. A stacking device, characterized in that, The stacking device includes a conveying mechanism, a cell conveying mechanism, a press conveying mechanism, a first handling mechanism, and a second handling mechanism, wherein: The conveying mechanism includes a conveying section, a first transfer section, and a second transfer section; The conveying section includes a conveyor belt that conveys along a first direction, and the conveying section is provided with a cell placement area, a welding strip placement area and a stacking area in sequence along the first direction; The first transfer section and the second transfer section are arranged sequentially along the first direction, wherein the first transfer section includes n transfer mechanisms and the second transfer section includes at least n-1 transfer mechanisms, and each of the transfer mechanisms is arranged side by side along the first direction below the conveyor surface of the conveyor belt; each of the transfer mechanisms is configured to extend upward beyond the conveyor surface of the conveyor belt and to move along the first direction; The first conveying mechanism is configured to lay the n sets of welding ribbons of the i-th batch one by one onto the n cells of the i-th batch carried by the welding ribbon placement area, wherein the front part of each set of welding ribbons is laid on the corresponding cell, and the rear part of each set of welding ribbons extends backward to the corresponding cell. The cell conveying mechanism is configured to convey multiple cells, and the fixture conveying mechanism is configured to convey multiple fixtures; The second transport mechanism adopts the transport mechanism as described in any one of claims 1 to 6. The second transport mechanism is configured to pick up n cells of the (i+1)th batch from the cell transport mechanism, and pick up n pressures of the i-th batch from the pressure conveyor mechanism, and lay the picked-up n cells of the (i+1)th batch into the cell placement area, and place the picked-up n pressures of the i-th batch one-to-one on the front portion of the n sets of solder ribbons of the i-th batch located in the solder ribbon placement area. The first transfer unit is configured to circulate between the cell placement area and the ribbon placement area, and the n transfer mechanisms in the first transfer unit are respectively used to transport n cells of the (i+1)th batch in the cell placement area to the ribbon placement area. The second transfer unit is configured to circulate between the solder ribbon placement area and the stacking area. At least n-1 transfer mechanisms in the second transfer unit correspond one-to-one with at least n-1 battery cells on the rear side of the i-th batch in the solder ribbon placement area. Each transfer mechanism in the second transfer unit is used to transport the corresponding battery cell, solder ribbon, and fixture to the stacking area, and to stack the battery cells on each transfer mechanism onto the rear portion of the adjacent solder ribbon in front, so as to form the i-th battery string segment in the stacking area. The conveyor belt is configured to move forward step by step to remove the (i-1)th battery string segment from the stacking area; Where n≥2, i≥2.

8. The stacking device as described in claim 7, characterized in that, The cell conveying mechanism and the press conveying mechanism are arranged side by side on the side of the conveying section along the first direction, with the output end of the cell conveying mechanism close to the output end of the press conveying mechanism. The first suction unit in the second transport mechanism is configured to pick up n cells of the (i+1)th batch from the output end of the cell conveying mechanism, and the second suction unit is configured to pick up n pressure fixtures of the (i)th batch from the output end of the pressure fixture conveying mechanism. The second transport mechanism is also configured to transport the n cells of the (i+1)th batch and the n pressure fixtures of the (i)th batch simultaneously, such that the first suction unit places the n cells of the (i+1)th batch picked up in the cell placement area, and the second suction unit places the n pressure fixtures of the (i)th batch picked up onto the n cells of the solder ribbon placement area one by one.

9. The stacking device as described in claim 8, characterized in that, The output end of the cell conveying mechanism is close to the cell placement area, and the output end of the press conveying mechanism is close to the welding strip placement area.

10. The stacking device as claimed in claim 7, characterized in that, The stacking device includes two second transport mechanisms, which are used to alternately pick up and place the battery cells and the clamps.

11. A method for stacking strings, characterized in that, The stacking method is implemented by the stacking apparatus according to any one of claims 7 to 10, and the stacking method includes: The first transfer unit is controlled to transport n solar cells of the i-th batch from the solar cell placement area to the solder strip placement area; The first conveying mechanism is controlled to place the n sets of welding ribbons of the i-th batch onto the n cells of the i-th batch located in the welding ribbon placement area, wherein the front part of each set of welding ribbons is placed on the corresponding cell, and the rear part of each set of welding ribbons extends backward to the corresponding cell. The second transport mechanism is controlled to simultaneously lay out n battery cells of the (i+1)th batch and n pressure pieces of the ith batch, such that the n battery cells of the (i+1)th batch are laid out in the empty battery cell placement area, and the n pressure pieces of the ith batch are placed one-to-one on the front portion of the n sets of solder ribbons of the ith batch located in the solder ribbon placement area, so as to form n stacked units composed of battery cells, solder ribbons and pressure pieces in the solder ribbon placement area; The control unit moves the (i-1)th battery string segment forward out of the stacking area; The second transfer unit is controlled to transport the n stacking units in the ribbon placement area to the empty stacking area and stack them, so that the battery cells of the later stacking unit are stacked on the rear section of the ribbon of the earlier stacking unit to form the i-th battery string segment in the stacking area. The first transfer unit is controlled to move n solar cells of the (i+1)th batch in the solar cell placement area to the vacated solder strip placement area; Where n≥2, i≥2.

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