Solar cell stringing device and solar cell stringing method

Abstract

The present application provides a solar cell stringing device and a solar cell stringing method. The solar cell stringing device comprises a first carrying apparatus, a second carrying apparatus, a conveying apparatus, and a serial connection apparatus. The conveying apparatus comprises a first conveying part, a first transfer part, and a second transfer part. In a first direction, the first conveying part is provided with a solar cell placement area, a solder ribbon placement area, and a lamination area. The first transfer part comprises n transfer mechanisms, the second transfer part comprises at least n-1 transfer mechanisms, and the transfer mechanisms are all configured to be capable of extending upwards from a conveying surface of a first conveyor belt and moving in the first direction. According to the solar cell stringing device of the present application, the first carrying apparatus and the second carrying apparatus cooperate to lay n groups of solder ribbons and n pressing tools on n solar cells located in the solder ribbon placement area, thereby obtaining n laminated units. Subsequently, the second transfer part stacks the n laminated units into a solar cell string segment. In the present application, n solar cells and n groups of solder ribbons can be stacked each time to form a solar cell string, thereby improving stringing efficiency.

Description

A battery cell stringing device and stringing method Technical Field

[0001] This application relates to the field of photovoltaic cell production, specifically a cell stringing device and stringing method. Background Technology

[0002] In the photovoltaic cell production process, cell stringing equipment is used to connect the cells in series using solder ribbons to form a cell string. During stringing, the cells and solder ribbons must first be stacked. The traditional method of stacking solar cells and solder ribbons is as follows: A solar cell transport device places the i-th solar cell on the solar cell placement position of a conveyor device. The conveyor device then transports the i-th solar cell to the solder ribbon placement position. A solder ribbon laying device lays the first half of the i-th group of solder ribbons on the i-th solar cell, with the second half of the i-th group of solder ribbons located on the solar cell placement position of the conveyor device. Then, the solar cell transport device continues to place the (i+1)-th solar cell on the second half of the i-th group of solder ribbons. The conveyor device transports the (i+1)-th solar cell to the solder ribbon placement position. A solder ribbon laying device lays the first half of the (i+1)-th group of solder ribbons on the (i+1)-th solar cell, with the second half of the (i+1)-th group of solder ribbons located on the solar cell placement position of the conveyor device. This process is repeated until i ≥ 1, and the solder ribbons and solar cells are stacked sequentially on the conveyor device to form a battery string to be connected in series.

[0003] Traditional stacking methods for solar cells and solder ribbons can only stack one solar cell and one set of solder ribbons at a time, which is very inefficient and seriously affects the production efficiency of solar cell strings. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a battery cell stringing device, which adopts the following technical solution:

[0005] A battery cell stringing device is used to string battery cells and welding strips into battery strings. The battery cell stringing device includes a first handling device, a second handling device, a conveying device, and a stringing device, wherein:

[0006] The conveying device includes a first conveying section, a first transfer section, and a second transfer section;

[0007] The first conveying section includes a first conveyor belt that conveys along a first direction, and the first conveying section is provided with a cell placement area, a welding strip placement area and a stacking area in sequence along the first direction.

[0008] 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 first conveyor belt along the first direction. Each transfer mechanism is configured to extend upward beyond the conveying surface of the first conveyor belt and to move along the first direction.

[0009] The first conveying device 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.

[0010] The second conveying device is configured to lay n solar cells of the (i+1)th batch and n pressure pieces of the ith batch in the cell placement area and the ribbon placement area, respectively. The n pressure pieces of the ith batch are placed one-to-one on the front part of the n sets of ribbons of the ith batch located in the ribbon placement area.

[0011] 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.

[0012] 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.

[0013] The first conveyor belt is configured to move forward each time to remove the (i-1)th battery string segment from the stacking area;

[0014] The series connection device is located in the back row of the stacking area and is configured to connect the stacked battery string segments in series so that the solder ribbon is connected to the battery cell to form a battery string.

[0015] Where n≥2, i≥2.

[0016] The cell stringing equipment provided in this application involves a first transport device and a second transport device working together to place n sets of solder ribbons and n clamps one-to-one onto the n cells of the current batch located in the solder ribbon placement area. This results in n stacking units composed of cells, solder ribbons, and clamps in the solder ribbon placement area. Subsequently, a second transfer unit stacks the n stacking units into new cell string segments. In other words, the cell stringing equipment of this application can stack n cells and n sets of solder ribbons from a batch to form cell string segments each time, thereby improving stringing efficiency.

[0017] During the process of laying or stacking the current battery string segment, the second transport device can lay the next batch of n battery cells to the battery cell placement area. Thus, when the second transfer unit stacks the stacked units located in the solder ribbon placement area to the stacking area, the first transfer unit can promptly move the next batch of n battery cells to the vacated solder ribbon placement area. This allows the first transport device, the second transport device, and the second transfer unit to immediately carry out the stacking of the next battery string segment, thereby ensuring the work cycle and further improving the battery string production efficiency.

[0018] In addition, during the stacking process, a press is placed on each cell to press the solder strip below onto the corresponding cell, ultimately ensuring the quality of the connection between the solder strip and the corresponding cell.

[0019] In some embodiments, the second transfer section includes n-1 transfer mechanisms; the n transfer mechanisms in the first transfer section are configured to: transport n cells of the (i+1)th batch in the cell placement area to the ribbon placement area, and stack the foremost cell of the (i+1)th batch of n cells onto the rear portion of the adjacent ribbon in front.

[0020] Since the first transfer unit's n transfer mechanisms transport n solar cells from the cell placement area to the ribbon placement area, the foremost solar cell has already been stacked onto the rear section of the adjacent ribbon (i.e., the tail ribbon of the stacked battery string segment). After the ribbon and press are laid, the stacked unit including the solar cell is already located within the battery string. Therefore, the second transfer unit does not need to perform the transport and stacking of the stacked unit including the solar cell. Thus, the second transfer unit only needs to set up n-1 transfer mechanisms to complete the transport and stacking of the other n-1 stacked units one by one, thereby reducing the equipment cost of the second transfer unit.

[0021] In some embodiments, the second transfer section includes n transfer mechanisms; the n transfer mechanisms in the second transfer section correspond one-to-one with the n solar cells of the i-th batch in the ribbon placement area. Each transfer mechanism in the second transfer section 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 portion of the adjacent ribbon in front, so as to form the i-th battery string segment in the stacking area.

[0022] If the n transfer mechanisms in the first transfer section cannot guarantee that the spacing between the foremost cell and the tail cell of the stacked cell segment in front meets the stringing requirements when transferring n cells from the cell placement area to the ribbon placement area, the second transfer section can be configured to include n transfer mechanisms. The n transfer mechanisms in the second transfer section can transfer the n stacked cells in the ribbon placement area to the stacking area to form a new cell string segment, thereby ensuring that the spacing between the foremost cell and the tail cell of the stacked cell segment in front meets the stringing requirements.

[0023] In some embodiments, the first conveying section includes at least two first conveyor belts arranged side-by-side at intervals along a second direction, the second direction being perpendicular to the first direction; the transfer mechanism includes a transfer body located below the first conveyor belts and at least two adsorption plates disposed on the transfer body, each adsorption plate being arranged side-by-side at intervals along the second direction, the adsorption plates being used to extend upward from the gap between two adjacent first conveyor belts and / or the outer side of the first conveyor belts to the conveying surface of the first conveyor belts, and the adsorption plates being used to support and adsorb the battery cells.

[0024] By configuring the first conveying section as at least two first conveyor belts arranged side by side at intervals along the second direction, and configuring the transfer mechanism as described above, the transfer mechanism can retract downwards to below the bearing surface of the first conveyor belt, or extend upwards from the first conveyor belt and adsorb the battery cells laid on the first conveyor belt, thereby driving the battery cells to move relative to the first conveyor belt, so as to move the battery cells from the battery cell placement area to the soldering strip placement area, or move the battery cells from the soldering strip placement area to the stacking area to stack the battery cells into strings.

[0025] In some embodiments, the first conveying section further includes a first support plate located below each of the first conveyor belts;

[0026] The first support plate has strip-shaped holes at the locations between two adjacent first conveyor belts. The strip-shaped holes extend along the length of the first conveyor belts and are used to avoid the adsorption plate. The adsorption plate extends upward through the strip-shaped holes onto the conveying surface of the first conveyor belts and also moves horizontally along the length of the first conveyor belts. The first support plate also has guide grooves at the locations between two adjacent first conveyor belts. Each guide groove extends along the length of the first conveyor belts, and the number of guide grooves is the same as the number of welding strips in each group of welding strips and corresponds one-to-one. Each guide groove is used to guide the rear section of the corresponding welding strip.

[0027] By setting a first support plate, the bearing surface of the first conveyor belt is supported, preventing the first conveyor belt from sagging. By setting strip-shaped holes on the first support plate, the adsorption plate of the transfer mechanism is avoided, allowing the adsorption plate to pass upward through the first support plate and extend upward beyond the conveying surface of the first conveyor belt to support and adsorb the battery cells, and to drive the battery cells to translate along a first direction. By setting guide grooves on the first support plate, the rear section of the welding strip is guided, preventing the rear section of the welding strip from shifting position during movement.

[0028] In some embodiments, a first negative pressure component is provided on the first support plate at a location corresponding to at least one of the cell placement area, the ribbon placement area, and the stacking area. A first through hole is provided on the first conveyor belt along its length direction. The first negative pressure component is used to provide adsorption force for the cells passing through the first through hole above the first negative pressure component, so that the first conveyor belt can adsorb the cells.

[0029] By setting a first negative pressure component and a first through hole on the first conveyor belt, the first conveyor belt can adsorb the battery cells laid on it, preventing the battery cells from becoming misaligned during the conveying process.

[0030] In some embodiments, the conveying device further includes a second conveying section disposed below the conveying surface of the first conveyor belt and located in the rear passage of the stacking area; the second conveying section includes a second conveyor belt, which conveys in the same direction as the first conveyor belt and conveys synchronously, the first conveyor belt being attached above the conveying surface of the second conveyor belt, the first conveyor belt being used to convey battery string segments from the stacking area onto the second conveyor belt, such that the battery string segments are supported by the second conveyor belt; or, the conveying device further includes a second conveying section, which includes a second conveyor belt, the input end of the second conveyor belt being connected to the output end of the first conveyor belt, the first conveyor belt being used to convey battery string segments from the stacking area onto the second conveyor belt, such that the battery string segments are supported by the second conveyor belt.

[0031] By setting up a second conveyor section, the battery string segments formed by stacking in the stacking area can be transferred from the first conveyor belt to the second conveyor belt of the second conveyor section. The second conveyor belt supports the battery string segments, ensuring that the solder strips located below the battery cells in the battery string segments can be attached to the lower surface of the corresponding battery cells, thereby ensuring that the solder strips and the lower surface of the battery cells can be effectively connected during subsequent stringing.

[0032] In some embodiments, the second conveying section further includes a second support plate located below the conveying surface of the second conveyor belt, the second support plate being used to support the conveying surface of the second conveyor belt.

[0033] By setting a second support plate, the conveying surface of the second conveyor belt is supported, preventing the second conveyor belt from sagging.

[0034] In some embodiments, a second negative pressure component is provided on the second support plate, and a second through hole is provided on the second conveyor belt along the length direction. The second negative pressure component is used to provide adsorption force for the second through hole above the second negative pressure component, so that the second conveyor belt can adsorb the battery cell.

[0035] By setting a second negative pressure component and a second through hole on the second conveyor belt, the second conveyor belt can hold the battery cells in place, preventing the battery cells from becoming misaligned during transport and affecting the series connection accuracy.

[0036] In some embodiments, the second conveyor belt is a Teflon belt.

[0037] The battery cells and welding strips are connected in series on the second conveyor belt. The use of a Teflon conveyor belt with high heat resistance as the second conveyor belt can improve its lifespan.

[0038] In some embodiments, the connecting device is disposed above and / or below the second conveying section, and the connecting device is any one of an infrared light box, an ultraviolet light box, a laser heating element, and an electromagnetic heating element.

[0039] Some simple and efficient series connection devices are provided, which can achieve efficient heating or irradiation of solar cells and solder ribbons, so that the solder ribbons can be welded or bonded to the corresponding solar cells.

[0040] In some embodiments, the battery cell stringing device further includes a first lifting drive module and a first translation drive module, wherein the first lifting drive module is used to drive each transfer mechanism to lift individually or simultaneously; the first translation drive module is used to drive each transfer mechanism to translate along a first direction and adjust the distance between two adjacent transfer mechanisms.

[0041] By setting up a first lifting drive module, the lifting and lowering adjustment of each transfer mechanism is realized, allowing each transfer mechanism to extend upwards beyond the conveying surface of the first conveyor belt or retract downwards below the conveying surface of the first conveyor belt. Furthermore, by setting up a first translation drive module, the translation drive of the transfer mechanisms is realized, enabling the transfer mechanisms to switch between the cell placement area and the solder ribbon placement area, or between the solder ribbon placement area and the stacking area. In addition, the first translation drive module also allows for flexible adjustment of the spacing between the transfer mechanisms, facilitating stacking operations.

[0042] In some embodiments, the second conveying device includes a drive assembly, a mounting bracket, n first suction assemblies, and n second suction assemblies, wherein: the mounting bracket is connected to the drive end of the drive assembly; the n first suction assemblies are mounted side-by-side on a first side section of the mounting bracket, and the n second suction assemblies are mounted side-by-side on a second side section of the mounting bracket; the drive assembly is configured to drive the mounting bracket to translate and lift, so as to drive the n first suction assemblies to respectively pick up a battery cell and place the picked-up battery cell in a battery cell placement area; and to drive the n second suction assemblies to respectively pick up a press, and to place the picked-up press onto the front portion of a set of corresponding solder strips located in the solder strip placement area, so as to press the solder strips below onto the battery cell.

[0043] By configuring the second handling device, it is possible to both lay n solar cells in the solar cell placement area and place n pressure plates on the front section of n sets of welding strips located in the welding strip placement area, thereby reducing equipment costs.

[0044] In some embodiments, the second conveying device includes a first conveying mechanism and a second conveying mechanism, wherein: the first conveying mechanism includes a first driving component, a first mounting bracket, and n first suction components, the first mounting bracket being connected to the driving end of the first driving component, and the n first suction components being mounted on the first mounting bracket; the first driving component is configured to drive the first mounting bracket to translate and lift, so as to drive the n first suction components to respectively suction a battery cell and place the suctioned battery cell in the battery cell placement area; the second conveying mechanism includes a second driving component, a second mounting bracket, and n second suction components, the second mounting bracket being connected to the driving end of the second driving component, and the n second suction components being mounted on the second mounting bracket;

[0045] The second drive assembly is configured to drive the second mounting bracket to translate and lift, so as to drive n second suction assemblies to respectively pick up a pressure fixture and place the picked-up pressure fixture on the front part of a set of corresponding welding strips located in the welding strip placement area, so as to press the welding strip below onto the battery cell.

[0046] The second handling device is configured as an independent first handling mechanism and a second handling mechanism. The first handling mechanism and the second handling mechanism independently lay out the battery cells and the presses. The first handling mechanism and the second handling mechanism can simultaneously place n battery cells and n presses into the battery cell placement area and the solder ribbon placement area, thereby improving the stringing efficiency. The first handling mechanism and the second handling mechanism can place n battery cells and n presses into the battery cell placement area and the solder ribbon placement area sequentially to improve flexibility.

[0047] In some embodiments, the cell stringing device further includes a ribbon slitting device configured to slit m ribbons extending along a first direction into n groups of ribbons having a predetermined length, each group of ribbons including m ribbons; the first conveying device includes n ribbon picking components for picking up the n groups of ribbons one-to-one, the n ribbon picking components being configured to move synchronously and have adjustable spacing to pick up the n groups of ribbons from the ribbon slitting device and to lay the n groups of ribbons one-to-one onto the n cells located in the ribbon placement area.

[0048] By setting up a solder ribbon slitting device, synchronous and automatic supply of n sets of solder ribbons is achieved. This allows the first transport device to pick up n sets of solder ribbons from the solder ribbon slitting device in one go and lay them onto the n cells of the i-th batch held in the solder ribbon placement area, thereby improving the efficiency of solder ribbon laying. By setting the first transport device to include n solder ribbon picking components with adjustable spacing, the spacing between the n sets of solder ribbons can be adjusted before laying them, ultimately ensuring that the n sets of solder ribbons can accurately land on their corresponding cells.

[0049] In some embodiments, the cell stringing device further includes a cell conveying device and a press conveying device, wherein: the cell conveying device is configured to convey cells to the side of the cell placement area, and the second conveying device is configured to pick up n cells from the cell conveying device and place the n cells in the cell placement area; the press conveying device is configured to convey presses to the side of the ribbon placement area, and the second conveying device is configured to pick up n presses from the press conveying device and place the picked-up n presses one by one onto the n cells located in the ribbon placement area.

[0050] By setting up a cell conveying device and a fixture conveying device, the second handling device can pick up the cells and fixtures nearby, thereby improving the placement efficiency of the cells and fixtures.

[0051] In some embodiments, the cell conveying device and the press conveying device are arranged side by side along a first direction on the side of the first conveying section, with the output end of the cell conveying device close to the output end of the press conveying device; the second conveying device is configured to simultaneously pick up n cells and n presses from the output ends of the cell conveying device and the press conveying device, respectively, and place the picked-up n cells in the cell placement area, while simultaneously laying the picked-up n presses one by one onto the n cells located in the ribbon placement area.

[0052] By arranging the cell conveying device and the press conveying device side by side along the first direction on the side of the first conveying section, and making the output end of the cell conveying device close to the output end of the press conveying device, the second conveying device 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 stringing efficiency of the battery string.

[0053] This application also provides a method for stringing solar cells, used to connect solar cells and solder strips in series to form a solar cell string. The method for stringing solar cells includes:

[0054] The n solar cells of the i-th batch are moved from the solar cell placement area to the solder ribbon placement area;

[0055] The n sets of welding ribbons in the i-th batch are laid one-to-one onto the n cells in 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 onto the corresponding cell.

[0056] Place the n solar cells of the (i+1)th batch into the empty solar cell placement area;

[0057] The n fixtures of the i-th batch are placed one by one on the front part of the n groups of solder strips of the i-th batch located in the solder strip placement area to form n stacked units consisting of solar cells, solder strips and fixtures in the solder strip placement area.

[0058] Transport the (i-1)th battery string segment from the stacking area to the serial connection area;

[0059] The n stacking units in the solder ribbon placement area are moved to the empty stacking area and stacked, so that the cells of the later stacking units are stacked on the rear part of the solder ribbon of the earlier stacking units to form the i-th cell string segment in the stacking area.

[0060] Move the n solar cells of the (i+1)th batch in the solar cell placement area to the empty solder strip placement area;

[0061] The (i-1)th battery string segment transported to the series connection area is heated or exposed to light, so that the battery cells in the (i-1)th battery string segment are welded and / or glued to the solder strip;

[0062] Where n≥2, i≥2, the cell placement area, the ribbon placement area, the stacking area and the series connection area are arranged sequentially along the first direction.

[0063] The battery cell stringing method of this application first places n sets of solder ribbons and n clamping fixtures one-to-one onto the n battery cells of the current batch located in the solder ribbon placement area, thereby obtaining n stacking units. Then, the n stacking units are stacked into a new battery string segment. In other words, the battery cell stringing method of this application can stack a batch of n battery cells and n sets of solder ribbons into a battery string segment each time, thereby improving the stringing efficiency.

[0064] In the process of laying and stacking the current segment of the battery string, the battery cell stringing method of this application can lay the next batch of n battery cells into the battery cell placement area. Thus, when the solder ribbon placement area becomes available, the next batch of n battery cells can be moved to the solder ribbon placement area to lay and stack the next segment of the battery string, thereby ensuring the working cycle and improving the battery string production efficiency.

[0065] In addition, during the stacking process, a press is placed on each cell to press the solder strip below onto the corresponding cell, ultimately ensuring the quality of the connection between the solder strip and the corresponding cell.

[0066] In some embodiments, during the process of transporting the n cells of the i-th batch from the cell placement area to the ribbon placement area, the n cells of the i-th batch are spaced apart so that space is left between two adjacent cells to accommodate the rear portion of the ribbon.

[0067] By spacing the n solar cells transported to the ribbon placement area, the distance between two adjacent solar cells is sufficient to accommodate the rear section of the ribbon. This ensures that after the front section of each ribbon is laid on the corresponding solar cell, the rear section of each ribbon can extend backward to the corresponding solar cell without touching the solar cell behind it. Attached Figure Description

[0068] Figure 1 is a schematic diagram of the structure of the battery cell stringing device in an embodiment of this application;

[0069] Figure 2 is a schematic diagram of a conveying device carrying battery cells, welding strips and a press in an embodiment of this application;

[0070] Figure 3 is a schematic diagram of the transfer mechanism in an embodiment of this application;

[0071] Figure 4 is a schematic diagram of the structure of the second conveying device in an embodiment of this application;

[0072] Figure 5 is a schematic diagram of the conveying device in an embodiment of this application from one perspective;

[0073] Figure 6 is a structural schematic diagram of the conveying device in an embodiment of this application from another perspective;

[0074] Figure 7 is a magnified view of a portion of Figure 6;

[0075] Figure 8 shows the structure of the conveying device in the embodiment of this application with the first and second transfer parts omitted.

[0076] Schematic diagram;

[0077] Figure 9 is a magnified view of a portion of Figure 8;

[0078] Figure 10 is a schematic diagram of the battery cell stringing process in one embodiment of this application;

[0079] Figure 11 is a schematic diagram of the battery cell stringing process in another embodiment of this application.

[0080] Figures 1 to 11 include:

[0081] First conveying device 1: Welding strip pickup assembly 11;

[0082] Second conveying device 2: drive assembly 21, mounting bracket 22, first suction assembly 23, second suction assembly

[0083] Component 24;

[0084] Conveying device 3: First conveying section 31, first transfer section 32, second transfer section 33, transfer mechanism 34.

[0085] Second conveying section 35, first conveyor belt 311, first support plate 312, strip hole 313, guide groove 314.

[0086] Transfer body 341, adsorption plate 342, adsorption hole 343, second conveyor belt 351, second support plate 352;

[0087] Series connection device 4;

[0088] 5. Welding strip slitting device;

[0089] 6. Battery cell conveying device;

[0090] Press conveyor 7;

[0091] Cell placement area A, solder ribbon placement area B, and stacking area C;

[0092] 100 solar cells, 200 welding strips, 300 pressing fixtures;

[0093] The first battery string segment is 501, the second battery string segment is 502, and the third battery string segment is 503. Detailed Implementation

[0094] 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.

[0095] As described in the background section, the traditional method of stacking solar cells and solder ribbons can only stack one solar cell and one set of solder ribbons at a time, which is very inefficient and seriously affects the production efficiency of solar cell strings.

[0096] To address this issue, this application provides a battery cell stringing device for connecting battery cells and solder strips into a battery string. The stringing can be achieved through welding, adhesive dot bonding, adhesive film bonding, or other series connection methods. Welding refers to the solder strip being welded to the battery cell through surface solder. Adhesive dot bonding refers to the solder strip and battery cell being bonded together through spaced adhesive dots. Adhesive film bonding refers to the solder strip being bonded to the battery cell through an adhesive film.

[0097] As shown in Figures 1 to 3, the battery cell stringing device in this embodiment includes a first handling device 1, a second handling device 2, a conveying device 3, and a stringing device 4, wherein:

[0098] The conveying device 3 includes a first conveying section 31, a first transfer section 32, and a second transfer section 33.

[0099] The first conveying section 31 includes a first conveyor belt 311 that conveys along a first direction (such as the X direction). The first conveying section 31 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.

[0100] The first transfer section 32 and the second transfer section 33 are arranged sequentially along a first direction. The first transfer section 32 includes n (e.g., 3 in the figure) transfer mechanisms 34, and the second transfer section 33 includes at least n-1 (e.g., 2 in the figure) transfer mechanisms 34. Each transfer mechanism 34 is arranged side by side below the conveying surface of the first conveyor belt 311 along the first direction. Each transfer mechanism 34 is configured to extend upward beyond the conveying surface of the first conveyor belt 311 and to move along the first direction.

[0101] The first conveying device 1 is configured to lay the n sets of welding ribbons of the i-th batch one-to-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.

[0102] The second conveying device 2 is configured to lay n solar cells of the (i+1)th batch and n pressure fixtures of the ith batch to the solar cell placement area A and the ribbon placement area B, respectively. The n pressure fixtures of the ith batch are placed one-to-one on the front section of the n sets of ribbons of the ith batch located in the ribbon placement area.

[0103] The first transfer unit 32 is configured to move cyclically between the cell placement area A and the ribbon placement area B. The n transfer mechanisms 34 in the first transfer unit 32 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.

[0104] The second transfer unit 33 is configured to move cyclically between the ribbon placement area B and the stacking area C. At least n-1 transfer mechanisms 34 in the second transfer unit 33 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 34 in the second transfer unit 33 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 34 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.

[0105] The first conveyor belt 311 is configured to move forward each time to move the (i-1)th battery string segment out of the stacking area C.

[0106] The series connection device 4 is located in the rear of the stacking area C. The series connection device 4 is configured to connect the stacked battery string segments in series so that the solder ribbon is connected to the battery cell to form a battery string.

[0107] Where n≥2, i≥2.

[0108] As can be seen, in the battery cell stringing equipment provided in this application, the first transport device 1 and the second transport device 2 cooperate with each other to place n sets of solder ribbons and n clamps one-to-one onto the n battery cells of the current batch located in the solder ribbon placement area B, thereby obtaining n stacking units composed of battery cells, solder ribbons, and clamps in the solder ribbon placement area B. Subsequently, the second transfer unit 33 stacks the n stacking units into a new battery string segment. In other words, the battery cell stringing equipment of this application can stack n battery cells and n sets of solder ribbons of a batch to form a battery string segment each time, thereby improving the stringing efficiency.

[0109] During the process of laying or stacking the current battery string segment, the second transport device 2 can lay the next batch of n battery cells to the battery cell placement area A. Thus, when the second transfer unit 33 stacks the stacking unit located in the solder ribbon placement area B to the stacking area C, the first transfer unit 32 can move the next batch of n battery cells to the vacated solder ribbon placement area B. This allows the first transport device 1, the second transport device 2, and the second transfer unit 33 to immediately perform the stacking of the next battery string segment, thereby ensuring the work cycle and further improving the battery string production efficiency.

[0110] In addition, during the stacking process, a clamping fixture is placed on each cell to press the solder strip below onto the corresponding cell, ultimately ensuring the quality of the solder strip connection to the corresponding cell. Various existing solder strip clamping fixtures can be used; for example, the clamping fixture includes a mounting frame and several rows of pressure pins set on the mounting frame, with each row of pressure pins used to press one solder strip onto the cell.

[0111] In some alternative embodiments, the second transfer section 33 includes n-1 transfer mechanisms 34. The n transfer mechanisms 34 in the first transfer section 32 are configured to: transport n cells of the (i+1)th batch in the cell placement area A to the ribbon placement area B, such that the foremost cell of the (i+1)th batch of n cells is stacked on the rear portion of the adjacent ribbon in front.

[0112] Since the n transfer mechanisms 34 in the first transfer unit 32, when transporting the n solar cells from the solar cell placement area A to the solder ribbon placement area B, have already stacked the foremost solar cell onto the rear portion of the adjacent solder ribbon (i.e., the tail solder ribbon of the stacked solar cell string segment on the front side), thus stacking it to meet the cell spacing or string spacing requirements for forming a solar cell string, after the subsequent stacking of the solder ribbon and the press, the stacked unit including the solar cell has already entered the solar cell string. Therefore, the second transfer unit 33 does not need to perform the transport and stacking of the stacked unit including the solar cell. Therefore, the second transfer unit 33 only needs to be equipped with n-1 transfer mechanisms 34 to complete the transport and stacking of the other n-1 stacked units one by one, thereby reducing the structural complexity and cost of the second transfer unit 33.

[0113] To enable those skilled in the art to better understand the technical solution of the battery cell stringing device in the embodiments of this application, the following will take n=2 as an example, that is, the first transfer part 32 includes 2 transfer mechanisms 34 and the second transfer part 33 includes 1 transfer mechanism 34, and describe the optional stringing process of the battery cell stringing device in the embodiments of this application in conjunction with FIG10.

[0114] As shown in Figure 10(a), the second transfer unit 33 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 34 of the first transfer unit 32 transport two battery cells 100 from the battery cell placement area A to the solder ribbon placement area B, ensuring 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 34 of the first transfer unit 32 adjust the spacing to create a larger gap between the battery cells 100 on the two transfer mechanisms 34, providing space for subsequent solder ribbon placement.

[0115] It should be noted that before the two battery cells in 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 34 of the first transfer unit 32.

[0116] As shown in Figure 10(b), the first transport device 1 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 33 moves from the stacking area C back to the solder ribbon placement area B, and the first transfer unit 32 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 34 of the second transfer unit 33 is located directly below the rear solar cell 100 of the two solar cells 100 of the second batch. During the translation process, the two transfer mechanisms 34 of the first transfer unit 32 adjust their spacing to ensure that the two transfer mechanisms 34 moving back to the solar cell placement area A have a small gap. Setting the spacing of the transfer mechanism 34 in the cell placement area A to be smaller can shorten the overall size of the conveying device 3 in the first direction and facilitate the placement of cells by the second handling device 2.

[0117] As shown in Figure 10(c), the second transport device 2 places the two clamps 300 of the second batch on the front part of the two sets of welding strips 200 of the second batch in the welding strip placement area B, thereby forming two stacked units composed of battery cells 100, welding strips 200 and clamps 300 in the welding strip placement area B.

[0118] In addition, the second transport device 2 lays the two solar cells 100 of the third batch into the solar cell placement area A. It should be noted that the second transport device 2 can simultaneously lay the two presses 300 of the second batch and the two solar cells 100 of the third batch, or it can lay one of them first and then lay the other.

[0119] As shown in Figure 10(d), one transfer mechanism 34 of the second transfer unit 33 extends upward from the conveying surface of the first conveyor belt 311, thereby lifting one of the rearmost of the two stacked units located in the solder strip placement area B out of the conveying surface of the first conveyor belt 311. Furthermore, the two transfer mechanisms 34 of the first transfer unit 32 extend upward from the conveying surface of the first conveyor belt 311, thereby correspondingly lifting two solar cells 100 of the third batch located in the solar cell placement area A out of the conveying surface of the first conveyor belt 311.

[0120] As shown in Figure 10(e), the first conveyor belt 311 moves forward, thereby removing the first battery string segment 501 located in the stacking area C from the stacking area C and transporting it to the stringing area (i.e., the area where the stringing device is located after the stacking area C). Of course, since the foremost stacking unit in the solder ribbon placement area B is not lifted out of the conveying surface of the first conveyor belt 311, the stacking unit is synchronously transported forward by the first conveyor belt 311 along with the first battery string segment 501. At the same time, a transfer mechanism 34 of the second transfer unit 33 transports a stacking unit located on the rear side in the solder ribbon placement area B to the empty stacking area C and stacks it, so that the battery cells of the stacking unit are stacked on the rear section of the solder ribbon of the preceding stacking unit, thereby forming the second battery string segment 502 in the stacking area C.

[0121] Meanwhile, the two transfer mechanisms 34 of the first transfer unit 32 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 34 of the first transfer unit 32 adjust the spacing to create a larger gap between the solar cells 100 on the two transfer mechanisms 34, leaving space for subsequent solder ribbon laying. Alternatively, one transfer mechanism 34 of the second transfer unit 33 can transport one stacking unit located in the solder ribbon placement area B to the empty stacking area C. After stacking is completed, the two transfer mechanisms 34 of the first transfer unit 32 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.

[0122] As shown in Figure 10(f), the first transport device 1 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 placed 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 33 moves from the stacking area C back to the solder ribbon placement area B, and the first transfer unit 32 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 34 of the second transfer unit 33 is located directly below the rear solar cell 100 of the two solar cells 100 of the third batch. During the translation process, the two transfer mechanisms 34 of the first transfer unit 32 adjust their spacing to ensure a small gap between the two transfer mechanisms 34 moving back to the solar cell placement area A.

[0123] As shown in (g) of Figure 10, the second transport device 2 places the two presses 300 of the third batch one-to-one on the front part of the two sets of welding strips 200 of the third batch located in the welding strip placement area B, thereby forming two stacked units composed of battery cells 100, welding strips 200 and presses 300 in the welding strip placement area B.

[0124] In addition, the second transport device 2 lays the two solar cells 100 of the fourth batch into the solar cell placement area A. It should be noted that the second transport device 2 can simultaneously lay the two presses 30 of the third batch and the two solar cells 100 of the fourth batch, or it can lay one of them first and then lay the other.

[0125] As shown in Figure 10(h), one transfer mechanism 34 of the second transfer unit 33 extends upward from the conveying surface of the first conveyor belt 311, thereby lifting one of the rearmost of the two stacked units located in the solder strip placement area B out of the conveying surface of the first conveyor belt 311. Furthermore, the two transfer mechanisms 34 of the first transfer unit 32 extend upward from the conveying surface of the first conveyor belt 311, thereby correspondingly lifting two solar cells 100 of the fourth batch located in the solar cell placement area A out of the conveying surface of the first conveyor belt 311.

[0126] As shown in Figure 10(i), the first conveyor belt 311 moves forward, transporting the second battery string segment 502 located in the stacking area C to the stringing area. Since the foremost stacking unit in the ribbon placement area B is not lifted out of the conveying surface of the first conveyor belt 311, this stacking unit is synchronously transported forward by the first conveyor belt 311 along with the second battery string segment 502. Simultaneously, a transfer mechanism 34 of the second transfer unit 33 transports a stacking unit located at the rear 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.

[0127] Meanwhile, the two transfer mechanisms 34 of the first transfer unit 32 transport two solar cells 100 from the fourth batch located in the solar cell placement area A to the empty ribbon placement area B. During the transport process, the two transfer mechanisms 34 of the first transfer unit 32 adjust the spacing to create a larger gap between the solar cells 100 on the two transfer mechanisms 34, leaving space for subsequent ribbon laying. Alternatively, one transfer mechanism 34 of the second transfer unit 33 can transport one stacking unit located in the ribbon placement area B to the empty stacking area C. After stacking is completed, the two transfer mechanisms 34 of the first transfer unit 32 then transport the two solar cells 100 from the fourth batch located in the solar cell placement area A to the empty ribbon placement area B.

[0128] The process is repeated so that the welding strip 200 and the battery cell 100 are stacked sequentially on the first conveying section 31 of the conveying device 3 to form a battery string to be connected in series. The battery string to be connected in series is finally connected in series by the connecting device 4 to form the final battery string.

[0129] In some alternative embodiments, the second transfer section 33 includes n transfer mechanisms 34. The n transfer mechanisms 34 in the second transfer section 33 correspond one-to-one with the n solar cells 100 of the i-th batch in the ribbon placement area B. Each transfer mechanism 34 in the second transfer section 33 is used to transport the corresponding solar cell, ribbon, and fixture to the stacking area C, and to stack the solar cells on each transfer mechanism 34 onto the rear portion of the adjacent ribbon in front, so as to form the i-th battery string segment in the stacking area.

[0130] If, when the n transfer mechanisms 34 in the first transfer unit 32 transport n battery cells from the battery cell placement area A to the solder ribbon placement area B, it is difficult to ensure that the spacing between the foremost battery cell and the tail battery cell of the stacked battery string segment in front meets the requirements for cell spacing or string spacing, the second transfer unit 33 can be configured to include n transfer mechanisms 34. The n transfer mechanisms 34 of the second transfer unit 33 can transport the n stacked units formed in the solder ribbon placement area B to the stacking area C to form a new battery string segment, thereby ensuring that the spacing between the foremost battery cell and the tail battery cell of the stacked battery string segment in front meets the stringing requirements.

[0131] Similarly, in order to enable those skilled in the art to better understand the technical solution of the battery cell stringing device in the embodiments of this application, the following will still take n=2 as an example, that is, the first transfer part 32 includes 2 transfer mechanisms 34 and the second transfer part 33 includes 2 transfer mechanisms 34. The stringing process of the battery cell stringing device in the embodiments of this application will be described in illustrative form with reference to FIG11.

[0132] As shown in Figure 11(a), the second transfer unit 33 stacks two battery cells 100 and solder ribbons of the first batch in the stacking area C to form a first battery string segment 501. Simultaneously, the two transfer mechanisms 34 of the first transfer unit 32 transport two battery cells 100 of the second batch from the battery cell placement area A to the solder ribbon placement area B. The foremost battery cell 100 (i.e., closest to the first battery string segment 501) can be stacked onto the rear portion of the adjacent solder ribbon 200 (i.e., the tail solder ribbon of the first battery string segment 501), or it can be left unstacked. Furthermore, during the transport process, the two transfer mechanisms 34 of the first transfer unit 32 adjust the spacing to create a larger gap between the battery cells 100 on the two transfer mechanisms 34, providing space for subsequent solder ribbon placement.

[0133] It should be noted that before the two battery cells in 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 34 of the first transfer unit 32.

[0134] As shown in Figure 11(b), the first transport device 1 lays the two sets of welding ribbons 200 of the second batch onto the two solar cells 100 of the second batch located in the welding ribbon placement area B, with the front portion of each set of welding ribbons 200 placed on the corresponding solar cell 100 and the rear portion of each set of welding ribbons 200 extending backward from the corresponding solar cell 100. Simultaneously, the second transfer unit 33 moves from the stacking area C back to the welding ribbon placement area B, and the first transfer unit 32 moves from the welding ribbon placement area B back to the solar cell placement area A. During the translation process, the two transfer mechanisms 34 in the second transfer unit 33 adjust their spacing to ensure that the two transfer mechanisms 34 after being moved back to the welding ribbon placement area B are directly below the two solar cells 100 of the second batch; the two transfer mechanisms 34 in the first transfer unit 32 adjust their spacing to ensure that the two transfer mechanisms 34 after being moved back to the solar cell placement area A have a small spacing. Setting the spacing of the transfer mechanism 34 in the cell placement area A to be smaller can shorten the overall size of the conveying device 3 in the first direction and facilitate the placement of cells by the second handling device 2.

[0135] As shown in Figure 11(c), the second transport device 2 places the two clamps 300 of the second batch on the front part of the two sets of welding strips 200 of the second batch in the welding strip placement area B, thereby forming two stacked units composed of battery cells 100, welding strips 200 and clamps 300 in the welding strip placement area B.

[0136] In addition, the second handling device 2 lays the two solar cells 100 of the third batch into the solar cell placement area A. It should be noted that the second handling device 2 can simultaneously handle the two clamps 300 of the second batch.

[0137] For the third batch of two 100-cell solar cells, the installation can be completed by laying one of them first, and then proceeding with the rest.

[0138] To lay out the foundation for the other.

[0139] As shown in Figure 11(d), the two transfer mechanisms 34 of the second transfer unit 33 extend upwards from the conveying surface of the first conveyor belt 311, thereby lifting the two stacked units located in the solder ribbon placement area B out of the conveying surface of the first conveyor belt 311 in a corresponding manner. Furthermore, the two transfer mechanisms 34 of the first transfer unit 32 extend upwards from the conveying surface of the first conveyor belt 311, thereby lifting the two solar cells 100 of the third batch located in the solar cell placement area A out of the conveying surface of the first conveyor belt 311 in a corresponding manner.

[0140] As shown in Figure 11(e), the first conveyor belt 311 moves forward to transport the first battery string segment 501 located in the stacking area C to the stringing area. At the same time, the two transfer mechanisms 34 of the second transfer unit 33 transport the two stacking units located in the solder strip placement area B to the empty stacking area C and stack them, such that the battery cells of the rear stacking unit are stacked on the rear portion of the solder strip of the front stacking unit, and the battery cells of the front stacking unit are stacked on the rear portion of the tail solder strip of the first battery string segment 501. Thus, the second battery string segment 502 is formed in the stacking area C.

[0141] Meanwhile, the two transfer mechanisms 34 of the first transfer unit 32 transport the two battery cells 100 of the third batch located in the battery cell placement area A to the vacant solder ribbon placement area B. Similarly, the battery cell 100 at the front (i.e., closest to the second battery string segment 502) can be stacked on the rear portion of the adjacent solder ribbon 200 (i.e., the tail solder ribbon of the second battery string segment 502), or it can be left unstacked on the rear portion of the adjacent solder ribbon 200. In addition, during the transportation process, the two transfer mechanisms 34 of the first transfer unit 32 adjust the spacing to create a larger gap between the battery cells 100 on the two transfer mechanisms 34, in order to leave space for subsequent solder ribbon laying. Alternatively, the two transfer mechanisms 34 of the second transfer unit 33 can move the two stacking units located in the ribbon placement area B to the empty stacking area C. After the stacking is completed, the two transfer mechanisms 34 of the first transfer unit 32 can then move the two battery cells 100 of the third batch located in the battery cell placement area A to the empty ribbon placement area B.

[0142] As shown in Figure 11(f), the first transport device 1 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 placed 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 33 moves from the stacking area C back to the solder ribbon placement area B, and the first transfer unit 32 moves from the solder ribbon placement area B back to the solar cell placement area A. During the translation process, the two transfer mechanisms 34 in the second transfer unit 33 adjust their spacing to ensure that the two transfer mechanisms 34 after being moved back to the solder ribbon placement area B are directly below the two solar cells 100 of the third batch; the two transfer mechanisms 34 in the first transfer unit 32 adjust their spacing to ensure that the two transfer mechanisms 34 after being moved back to the solar cell placement area A have a small spacing.

[0143] As shown in Figure 11(g), the second transport device 2 places the two presses 300 of the third batch one-to-one on the front part of the two sets of welding strips 200 of the third batch located in the welding strip placement area B, thereby forming two stacked units composed of battery cells 100, welding strips 200 and presses 300 in the welding strip placement area B.

[0144] In addition, the second conveying device 2 lays the two solar cells 100 of the fourth batch into the solar cell placement area A.

[0145] It should be noted that the second conveying device 2 can simultaneously lay out the two presses 300 of the third batch and the two battery cells 100 of the fourth batch, or it can lay out one of them first and then lay out the other.

[0146] As shown in Figure 11(h), the two transfer mechanisms 34 of the second transfer unit 33 extend upwards from the conveying surface of the first conveyor belt 311, thereby lifting the two stacked units located in the solder ribbon placement area B out of the conveying surface of the first conveyor belt 311 in a corresponding manner. Furthermore, the two transfer mechanisms 34 of the first transfer unit 32 extend upwards from the conveying surface of the first conveyor belt 311, thereby lifting the two solar cells 100 of the fourth batch located in the solar cell placement area A out of the conveying surface of the first conveyor belt 311 in a corresponding manner.

[0147] As shown in Figure 11(i), the first conveyor belt 311 moves forward to transport the second battery string segment 502 located in the stacking area C to the stringing area. At the same time, the two transfer mechanisms 34 of the second transfer unit 33 transport the two stacking units located in the solder strip placement area B to the empty stacking area C and stack them, such that the battery cells of the rear stacking unit are stacked on the rear portion of the solder strip of the front stacking unit, and the battery cells of the front stacking unit are stacked on the rear portion of the tail solder strip of the second battery string segment 502. Thus, a third battery string segment 503 is formed in the stacking area C.

[0148] Meanwhile, the two transfer mechanisms 34 of the first transfer unit 32 transport the two battery cells 100 of the fourth batch located in the battery cell placement area A to the vacant solder ribbon placement area B. Similarly, the battery cell 100 at the front (i.e., closest to the third battery string segment 503) can be stacked on the rear portion of the adjacent solder ribbon 200 (i.e., the tail solder ribbon of the third battery string segment 503), or it can be left unstacked on the rear portion of the adjacent solder ribbon 200. In addition, during the transportation process, the two transfer mechanisms 34 of the first transfer unit 32 adjust the spacing to create a larger gap between the battery cells 100 on the two transfer mechanisms 34, in order to leave space for subsequent solder ribbon laying. Alternatively, the two transfer mechanisms 34 of the second transfer unit 33 can move the two stacking units located in the ribbon placement area B to the empty stacking area C. After the stacking is completed, the two transfer mechanisms 34 of the first transfer unit 32 can then move the two battery cells 100 of the fourth batch located in the battery cell placement area A to the empty ribbon placement area B.

[0149] The process is repeated so that the welding strip 200 and the battery cell 100 are stacked sequentially on the first conveying section 31 of the conveying device 3 to form a battery string to be connected in series. The battery string to be connected in series is finally connected in series by the connecting device 4 to form the final battery string.

[0150] Optionally, the battery cell stringing device in this embodiment further includes a first lifting drive module and a first translation drive module. The first lifting drive module is used to drive each transfer mechanism 34 to lift individually or simultaneously. The first translation drive module is used to drive each transfer mechanism 34 to translate along a first direction and adjust the distance between two adjacent transfer mechanisms.

[0151] By setting up a first lifting drive module, the lifting and lowering adjustment of each transfer mechanism 34 is realized, allowing each transfer mechanism 34 to extend upwards beyond the conveying surface of the first conveyor belt 311 or retract downwards below the conveying surface of the first conveyor belt 311. Furthermore, by setting up a first translation drive module, the translation drive of the transfer mechanisms 34 is realized, enabling the transfer mechanisms 34 to switch between the cell placement area A and the solder ribbon placement area B, or between the solder ribbon placement area B and the stacking area C. In addition, the first translation drive module also enables flexible adjustment of the spacing between the transfer mechanisms 34.

[0152] Both the first lifting drive module and the first translation drive module can employ various existing types of linear drive modules. For example, the first lifting drive module includes lifting cylinders corresponding to each of the transfer mechanisms 34, with each lifting cylinder independently driving the corresponding transfer mechanism 34 to lift. The first translation drive module includes a base, a rack, and sliders corresponding to each transfer mechanism 34, wherein the rack is fixedly mounted on the base along a first direction. The sliders are all slidably connected to the base, and each transfer mechanism 34 is mounted on its corresponding slider. Each slider is equipped with a gear meshing with the rack and a motor that drives the gear to rotate. Since each motor can independently drive its corresponding slider to translate along the first direction via the gear and rack, the first translation drive module achieves translational drive of each transfer mechanism 34 and adjustment of the spacing between the transfer mechanisms 34.

[0153] As shown in Figures 2 and 3, optionally, the first conveying section 31 includes at least two first conveyor belts 311 arranged side-by-side at intervals along a second direction (e.g., the Y direction), the second direction being perpendicular to the first direction. The transfer mechanism 34 includes a transfer body 341 located below the first conveyor belts 311 and at least two adsorption plates 342 disposed on the transfer body 341. Each adsorption plate 342 is arranged side-by-side at intervals along the second direction. The adsorption plates 342 are used to extend upward from the gap between two adjacent first conveyor belts 311 and / or the outer side of the first conveyor belts 311 to support and adsorb the battery cells 100.

[0154] When the adsorption plate 342 retracts downwards to below the conveying surface of the first conveyor belt 311, the battery cell 100 can fall back onto the conveying surface of the first conveyor belt 311.

[0155] Taking the transfer mechanism 34 in the first transfer section 32 as an example, when it is necessary to transport the battery cell 100 located in the battery cell placement area A to the solder ribbon placement area B, the adsorption plate 342 of the transfer mechanism 34 extends upward from the conveying surface of the first conveyor belt 311. The adsorption plate 342 lifts the battery cell 100 located in the battery cell placement area A out of the first conveyor belt 311 and adsorbs the battery cell 100. Subsequently, the transfer mechanism 34 moves horizontally to the solder ribbon placement area B, and the adsorption plate 342 retracts downward to below the conveying surface of the first conveyor belt 311, so that the battery cell 100 falls onto the conveying surface of the first conveyor belt 311 in the solder ribbon placement area B.

[0156] Taking the transfer mechanism 34 in the second transfer section 33 as an example, when it is necessary to transport the stacked unit, which is formed by stacking battery cells, solder ribbons, and presses in the solder ribbon placement area B, to the stacking area C, the adsorption plate 342 of the transfer mechanism 34 extends upward from the conveying surface of the first conveyor belt 311. The adsorption plate 342 lifts the stacked unit in the solder ribbon placement area B out of the first conveyor belt 311 and adsorbs the battery cells 100 of the stacked unit. Subsequently, the transfer mechanism 34 moves horizontally to the stacking area C, and the adsorption plate 342 retracts downward to below the conveying surface of the first conveyor belt 311, so that the battery cells 100 of the stacked unit are stacked on the rear section of the adjacent solder ribbon in front.

[0157] To ensure that each adsorption plate 342 of the transfer mechanism 34 possesses adsorption capabilities, optionally, the transfer body 341 is provided with an air chamber connected to a vacuum device, and each adsorption plate 342 is provided with an adsorption hole 343 communicating with the air chamber. The adsorption hole 343 has an adsorption opening located on the upper end face of the adsorption plate 342. The vacuum device evacuates air from the air chamber, thereby generating an adsorption force on the upper end face of each adsorption plate 342 for adsorbing the battery cell 100.

[0158] As shown in Figures 5 to 9, optionally, the first conveying unit 31 further includes a first support plate 312 located below each of the first conveyor belts 311. A strip-shaped hole 313 is provided on the first support plate 312 at a position corresponding to the space between two adjacent first conveyor belts 311. The strip-shaped hole 313 extends along the length direction of the first conveyor belt 311 and is used to avoid the adsorption plate 342 of the transfer mechanism 34. The adsorption plate 342 extends upward through the strip-shaped hole 313 onto the conveying surface of the first conveyor belt 311 and also translates along the length direction of the first conveyor belt 311 through the strip-shaped hole 313.

[0159] Furthermore, a guide groove 314 is provided on the first support plate 312 at the position between two adjacent first conveyor belts 311. Each guide groove 314 extends along the length of the first conveyor belt 311, and the number of guide grooves 314 is the same as the number of welding strips in each group of welding strips 200 and corresponds one-to-one. Each guide groove 314 is used to guide the rear section of the corresponding welding strip 200. That is, when the first conveying device 1 lays each group of welding strips 200 onto the corresponding battery cell 100 located in the welding strip placement area B, the rear section of each welding strip in each group of welding strips 200 falls into the corresponding guide groove 314. Thus, when the battery cell 100 is transported from the welding strip placement area B to the stacking area C, the guide groove 314 can guide the rear section of the welding strip, thereby preventing the rear section of the welding strip from shifting position.

[0160] Optionally, a first negative pressure component is provided on the first support plate 312 at a location corresponding to at least one of the cell placement area A, the ribbon placement area B, and the stacking area C. A first through hole is provided on the first conveyor belt 311 along its length direction. The first negative pressure component is used to provide adsorption force for the cells passing through the first through hole above the first negative pressure component, so that the first conveyor belt 311 can adsorb the cells 100 and prevent the cells 100 placed on the first conveyor belt 311 from accidentally sliding.

[0161] The first negative pressure component is, for example, a negative pressure cavity disposed in the first support plate 312. The negative pressure cavity is connected to an air extraction device. The air extraction device extracts air from the negative pressure cavity, thereby generating negative pressure in the negative pressure cavity, which ultimately causes the first through hole connected to the negative pressure cavity to generate an adsorption force.

[0162] As shown in Figures 5 to 9, optionally, the conveying device 3 further includes a second conveying section 35, which is disposed below the conveying surface of the first conveyor belt 311 and located after the stacking area C. The second conveying section 35 includes a second conveyor belt 351, which conveys in the same direction as the first conveyor belt 311 and conveys synchronously. The first conveyor belt 311 is attached above the conveying surface of the second conveyor belt 351. The first conveyor belt 311 is used to convey battery string segments from the stacking area C onto the second conveyor belt 351, so that the battery string segments are supported by the second conveyor belt 351. Finally, the second conveyor belt 351 conveys the battery string segments to the stringing area for stringing.

[0163] In addition, during the conveying process of the first conveyor belt 311, the rear section of the welding strip is transferred from the support plate 312 below the first conveyor belt 311 to the second conveyor belt 351, and the second conveyor belt 351 continues to support the rear section of the welding strip. This ensures that the welding strip located below the battery cell in the battery string segment can be attached to the lower surface of the corresponding battery cell, thereby ensuring that the welding strip and the lower surface of the battery cell can be effectively connected during subsequent stringing.

[0164] In order to transport battery string segments to the stringing area for stringing, a second conveying unit 35 can also be provided at the output end of the first conveying unit 31. The second conveying unit 35 includes a second conveyor belt 351. The input end of the second conveyor belt 351 is connected to the output end of the first conveyor belt 311. The first conveyor belt 311 is used to transport battery string segments from the stacking area C to the second conveyor belt 351, so that the battery string segments are supported by the second conveyor belt 351. Finally, the second conveyor belt 351 transports the battery string to the stringing area for stringing.

[0165] During the conveying process of the first conveyor belt 311, the rear section of the welding strip is transferred from the support plate 312 below the first conveyor belt 311 to the second conveyor belt 351, where the second conveyor belt 351 continues to support the rear section of the welding strip.

[0166] Optionally, the second conveying unit 35 further includes a second support plate 352 located below the conveying surface of the second conveyor belt 351. The second support plate 352 is used to support the conveying surface of the second conveyor belt 351. By providing the second support plate 352, the conveying surface of the second conveyor belt 351 is supported, preventing the second conveyor belt 351 from sagging.

[0167] Optionally, a heating component (such as a heating rod) is also provided in the second support plate 352. The heating component can preheat the battery string, thereby improving the connection efficiency of the connection device 4.

[0168] Optionally, the second support plate 352 is provided with a second negative pressure component, and the second conveyor belt 351 is provided with a second through hole along the length direction. The second negative pressure component is used to provide adsorption force for the second through hole above the second negative pressure component, so that the second conveyor belt 351 can adsorb the battery cell 100 and prevent the battery cell 100 from sliding during the conveying process.

[0169] The second negative pressure component is, for example, a negative pressure cavity set in the second support plate 352. The negative pressure cavity is connected to an air extraction device. The air extraction device extracts air from the negative pressure cavity, thereby generating negative pressure in the negative pressure cavity, which ultimately causes the second through hole connected to the negative pressure cavity to generate an adsorption force.

[0170] Optionally, the second conveyor belt 351 is a Teflon belt. Battery segments are connected in series on the second conveyor belt 351. Using a Teflon belt with high heat resistance as the second conveyor belt 351 can improve the service life of the second conveyor belt 351.

[0171] As described above, the series connection in this application can be a series connection such as welding, adhesive dot bonding, or adhesive film bonding. In a specific embodiment, depending on the specific method of series connection, the series connection device 4 can be any one of an infrared lamp box, an ultraviolet lamp box, a laser heating element, or an electromagnetic heating element. The infrared lamp box, laser heating element, and electromagnetic heating element are connected in series by heating and are suitable for series connection methods using welding, thermosetting adhesive bonding, or adhesive film bonding. The ultraviolet lamp box is connected in series by UV light irradiation and is suitable for series connection methods using UV adhesive bonding.

[0172] As described above, the second transport device 2 needs to lay n battery cells in the battery cell placement area A and also needs to place n pressure plates on the front section of the n sets of welding strips located in the welding strip placement area B.

[0173] As shown in Figure 4, optionally, the second conveying device 2 includes a drive assembly 21, a mounting bracket 22, n first suction assemblies 23, and n second suction assemblies 24, wherein: the mounting bracket 22 is connected to the drive end of the drive assembly 21. The n first suction assemblies 23 are mounted side by side on the first side section of the mounting bracket 22, and the n second suction assemblies 24 are mounted side by side on the second side section of the mounting bracket 22.

[0174] The drive assembly 21 is configured to drive the mounting bracket 22 to translate and lift, thereby causing n first suction assemblies 23 to each suction a battery cell and place the suctioned battery cell in the battery cell placement area A. It also drives n second suction assemblies 24 to each suction a press and place the suction press onto the front portion of a set of corresponding solder strips located in the solder strip placement area B, thereby pressing the solder strips below onto the battery cell.

[0175] During the stringing process, n first-pickup components 23 are controlled to pick up n solar cells, and n second-pickup components 24 are controlled to pick up n fixtures. Then, the n first-pickup components 23 and n second-pickup components 24 are controlled to simultaneously place the n solar cells into the solar cell placement area A and place the n fixtures into the ribbon placement area B. In other words, the second handling device 2 simultaneously places the (i+1)th batch of n solar cells and the ith batch of n fixtures into the solar cell placement area A and the ribbon placement area B, thereby improving the stringing efficiency.

[0176] Of course, during the stringing process, one approach is to first control n first suction components 23 to place n solar cells into solar cell placement area A, and then control n second suction components 24 to place n clamps into solder ribbon placement area B. Alternatively, one approach is to first control n second suction components 24 to place n clamps into solder ribbon placement area B, and then control n first suction components 23 to place n solar cells into solar cell placement area A. In other words, the n solar cells of the (i+1)th batch and the n clamps of the ith batch are placed in place sequentially in two separate steps.

[0177] The drive assembly 21 can employ various existing drive devices capable of driving the mounting bracket 22 to translate and lift. For example, the drive assembly 21 includes a translation drive and a lifting drive, wherein the translation drive is used to drive the mounting bracket 22 to translate, and the lifting drive is used to drive the mounting bracket 22 to lift. Alternatively, the drive assembly 21 can be a multi-axis robot arm, with the mounting bracket 22 connected to the end of the multi-axis robot arm, which drives the mounting bracket 22 to translate and lift. The first suction assembly 23 may include, for example, multiple sets of suction cups, each set corresponding to one battery cell. The second suction assembly 24 may include, for example, multiple sets of magnets or suction cups, each set corresponding to one clamp.

[0178] In another optional embodiment, the second transport device 2 includes a first transport mechanism and a second transport mechanism, wherein: the first transport mechanism includes a first drive assembly, a first mounting bracket, and n first suction assemblies. The first mounting bracket is connected to the drive end of the first drive assembly, and the n first suction assemblies are mounted on the first mounting bracket. The first drive assembly is configured to drive the first mounting bracket to translate and move up and down, so that the n first suction assemblies respectively pick up a battery cell and place the picked-up battery cell in the battery cell placement area A. The second transport mechanism includes a second drive assembly, a second mounting bracket, and n second suction assemblies. The second mounting bracket is connected to the drive end of the second drive assembly, and the n second suction assemblies are mounted on the second mounting bracket. The second drive assembly is configured to drive the second mounting bracket to translate and move up and down, so that the n second suction assemblies respectively pick up a pressure fixture and place the picked-up pressure fixture onto the front portion of a set of corresponding solder strips located in the solder strip placement area B, so as to press the solder strips below onto the battery cell.

[0179] The first and second transport mechanisms can simultaneously place n solar cells of the (i+1)th batch and n fixtures of the ith batch into the solar cell placement area A and the solder ribbon placement area B, thereby improving stringing efficiency. The first and second transport mechanisms can sequentially place n solar cells of the (i+1)th batch and n fixtures of the ith batch into the solar cell placement area A and the solder ribbon placement area B.

[0180] The second transport device 2 is configured as an independent first transport mechanism and a second transport mechanism. The first transport mechanism and the second transport mechanism independently place the battery cells and the pressure fixture, which can improve the independence of the battery cell and pressure fixture placement actions and further improve the laying efficiency of the battery string.

[0181] The first and second drive components can adopt the same structure as the drive component 21 in the previous embodiment, such as a drive component composed of a translation drive unit and a lifting drive unit, or a multi-axis robot arm. The first suction component can be, for example, multiple sets of suction cups, and the second suction component can be, for example, multiple sets of magnets or suction cups.

[0182] As shown in Figure 1, optionally, the battery cell stringing device in this embodiment further includes a solder strip slitting device 5. The solder strip slitting device 5 is configured to slit m solder strips extending along a first direction into n groups of solder strips with predetermined lengths, each group of solder strips including m solder strips. The first conveying device 1 includes n solder strip picking components 11 for picking up the n groups of solder strips one-to-one. The n solder strip picking components 11 are configured to move synchronously and have adjustable spacing to ensure that the n groups of solder strips can be picked up smoothly from the solder strip slitting device 5 and laid one-to-one onto the n battery cells located in the solder strip placement area B.

[0183] By setting up the ribbon slitting device 5, the synchronous and automatic supply of n sets of ribbons is realized, enabling the first conveying device 1 to pick up n sets of ribbons from the ribbon slitting device 5 at one time and lay the n sets of ribbons on the n cells of the i-th batch carried by the ribbon placement area B at one time, thereby improving the ribbon laying efficiency.

[0184] By configuring the first conveying device 1 to include n solder strip picking components 11 with adjustable spacing, it is ensured that the n solder strip picking components 11 can pick up n sets of solder strips from the solder strip cutting device 5 one by one, and that the n solder strip picking components 11 can adjust the spacing between the n sets of solder strips before laying them, thus ensuring that the front part of the n sets of solder strips can be accurately stacked onto the corresponding battery cells one by one.

[0185] The solder strip slitting device 5 can be any known slitting device capable of slitting solder strips.

[0186] Optionally, the welding strip pickup assembly 11 includes a pair of first clamping members and second clamping members, wherein the first clamping members and the second clamping members cooperate to clamp the two ends of m welding strips to carry out the transportation of the group of welding strips.

[0187] As shown in Figure 1, optionally, the battery cell stringing device in this embodiment further includes a battery cell conveying device 6 and a clamping device 7, wherein: the battery cell conveying device 6 is configured to convey the battery cells to the side of the battery cell placement area A, and the second conveying device 2 is configured to pick up n battery cells 100 from the battery cell conveying device 6 and place the n battery cells 100 in the battery cell placement area A. The clamping device 7 is configured to convey clamps 300 to the side of the solder ribbon placement area B, and the second conveying device 2 is configured to pick up n clamps 300 from the clamping device 7 and place the picked-up n clamps 300 one-to-one onto the n battery cells 100 located in the solder ribbon placement area B.

[0188] By setting up the cell conveying device 6 and the fixture conveying device 7, the second handling device 2 can pick up the cells and fixtures nearby, thereby improving the placement efficiency of the cells and fixtures.

[0189] To further improve the efficiency of placing the battery cells and fixtures, optionally, the battery cell conveying device 6 and the fixture conveying device 7 are arranged side by side along the first direction on the side of the first conveying section 31, with the output end of the battery cell conveying device 6 close to the output end of the fixture conveying device 7. The second handling device 2 is configured to simultaneously pick up n battery cells and n fixtures from the output ends of the battery cell conveying device 6 and the fixture conveying device 7, respectively, and place the picked-up n battery cells in the battery cell placement area A, while simultaneously placing the picked-up n fixtures one by one onto the n battery cells located in the solder strip placement area B.

[0190] Based on the same concept, this application also provides a method for stringing solar cells, which is used to connect solar cells and solder strips in series to form a solar cell string. The stringing can be achieved through welding, glue dot bonding, film bonding, or other stringing methods.

[0191] The method for stringing battery cells in the embodiments of this application includes:

[0192] Step S1: Move the n solar cells of the i-th batch from the solar cell placement area to the solder ribbon placement area.

[0193] Step S2: Place the n sets of solder ribbons of the i-th batch onto the n cells of the i-th batch located in the solder ribbon placement area, wherein the front part of each set of solder ribbons is placed on the corresponding cell, and the rear part of each set of solder ribbons extends backward onto the corresponding cell.

[0194] Step S3: Place the n solar cells of the (i+1)th batch into the empty solar cell placement area.

[0195] Step S4: Place the n fixtures of the i-th batch one by one on the front part of the n groups of solder strips of the i-th batch located in the solder strip placement area, so as to form n stacked units composed of battery cells, solder strips and fixtures in the solder strip placement area.

[0196] Step S5: Transport the (i-1)th battery string segment from the stacking area to the serial connection area.

[0197] Step S6: Move the n stacking units in the solder 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 part of the solder ribbon of the earlier stacking unit to form the i-th battery string segment in the stacking area.

[0198] Step S7: Move the n solar cells of the (i+1)th batch in the solar cell placement area to the empty solder strip placement area;

[0199] Step S8: Heating or irradiating the (i-1)th battery string segment transported to the series connection area, so that the battery cells in the (i-1)th battery string segment are welded and / or glued to the solder strip.

[0200] In the above steps, n≥2, i≥2, the cell placement area, the ribbon placement area, the stacking area and the series connection area are arranged sequentially along the first direction.

[0201] Steps S3 and S4 can be executed simultaneously. Alternatively, step S3 can be executed first, followed by step S4. Or, step S4 can be executed first, followed by step S3.

[0202] Steps S5, S6, and S7 can be executed simultaneously. Alternatively, steps S5 and S6 can be executed simultaneously, followed by step S7.

[0203] As can be seen, the battery cell stringing method in this embodiment first places n sets of solder ribbons and n clamps one-to-one onto the n battery cells of the current batch located in the solder ribbon placement area, thereby obtaining n stacking units. Then, the n stacking units are stacked into a new battery string segment. In other words, the battery cell stringing method in this embodiment can stack a batch of n battery cells and n sets of solder ribbons into a battery string segment each time, thereby improving the stringing efficiency.

[0204] In the battery cell stringing method of this application embodiment, during the process of laying and stacking the current battery string segment, the next batch of n battery cells can be laid in the battery cell placement area. Thus, when the solder ribbon placement area is empty, the next batch of n battery cells can be moved to the solder ribbon placement area to carry out the stacking of the next battery string segment, thereby ensuring the working cycle and improving the battery string production efficiency.

[0205] In addition, during the stacking process, a press is placed on each cell to press the solder strip below onto the corresponding cell, ultimately ensuring the quality of the connection between the solder strip and the corresponding cell.

[0206] Optionally, in step S1, during the process of moving the n cells of the i-th batch from the cell placement area to the ribbon placement area, the n cells of the i-th batch are spaced apart, so that space is left between two adjacent cells to accommodate the rear part of the ribbon, thereby ensuring that the front part of each ribbon is laid on the corresponding cell, and the rear part of each ribbon can extend backward to the corresponding cell without touching the cell behind it.

[0207] The battery cell stringing method in this application embodiment can be implemented by the battery cell stringing device in any of the preceding embodiments. Further implementation details can be found in the relevant descriptions of the battery cell stringing devices in the preceding embodiments, which will not be repeated here.

[0208] 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

A battery cell stringing device, characterized in that, The battery cell stringing equipment, used to string battery cells with solder strips to form battery strings, includes a first handling device, a second handling device, a conveying device, and a stringing device, wherein: The conveying device includes a first conveying section, a first transfer section, and a second transfer section; The first conveying section includes a first conveyor belt that conveys along a first direction, and the first 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 below the conveying surface of the first conveyor belt along the first direction; each of the transfer mechanisms is configured to extend upward beyond the conveying surface of the first conveyor belt and to move along the first direction; The first conveying device is configured to lay the n sets of solder ribbons of the i-th batch one by one onto the n cells of the i-th batch carried by the solder ribbon placement area, wherein the front part of each set of solder ribbons is laid on the corresponding cell, and the rear part of each set of solder ribbons extends backward to the corresponding cell. The second conveying device is configured to lay n cells of the (i+1)th batch and n presses of the ith batch in the cell placement area and the ribbon placement area, respectively. The n presses of the ith batch are placed one-to-one on the front section of the n sets of ribbons of the ith batch located in the 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 first conveyor belt is configured to move forward each time to remove the (i-1)th battery string segment from the stacking area; The serial connection device is located in the rear section of the stacking area and is configured to serially connect the stacked battery string segments so that the solder ribbon is connected to the battery cell to form a battery string. Where n≥2, i≥2. The battery cell stringing device as described in claim 1 is characterized in that, The second transfer unit includes n-1 of the aforementioned transfer mechanisms; The n transfer mechanisms in the first transfer section are configured to: transport n cells of the (i+1)th batch in the cell placement area to the ribbon placement area, and stack the foremost cell of the (i+1)th batch of n cells onto the rear portion of the adjacent ribbon in front. The battery cell stringing device as described in claim 1 is characterized in that, The second transfer unit includes n of the aforementioned transfer mechanisms; The n transfer mechanisms in the second transfer section correspond one-to-one with the n battery cells in the i-th batch of the solder ribbon placement area. Each transfer mechanism in the second transfer section is used to transport the corresponding battery cell, solder ribbon and press to the stacking area, and to stack the battery cells on each transfer mechanism onto the rear section of the adjacent solder ribbon in front, so as to form the i-th battery string segment in the stacking area. The battery cell stringing device as described in claim 1 is characterized in that, The first conveying section includes at least two first conveyor belts arranged side by side at intervals along a second direction, the second direction being perpendicular to the first direction; The transfer mechanism includes a transfer body located below the first conveyor belt and at least two adsorption plates disposed on the transfer body. Each adsorption plate is arranged side by side at intervals along the second direction. The adsorption plates are used to extend upward from the gap between two adjacent first conveyor belts and / or the outer side of the first conveyor belt to the conveying surface of the first conveyor belt. The adsorption plates are used to support and adsorb the battery cells. The battery cell stringing device as described in claim 4 is characterized in that, The first conveying section further includes a first support plate located below each of the first conveyor belts; The first support plate has a strip-shaped hole at the position between two adjacent first conveyor belts. The strip-shaped hole extends along the length direction of the first conveyor belt. The strip-shaped hole is used to avoid the adsorption plate. The adsorption plate extends upward through the strip-shaped hole to the conveying surface of the first conveyor belt and moves horizontally along the length direction of the first conveyor belt through the strip-shaped hole. The first support plate is also provided with guide grooves at the positions between two adjacent first conveyor belts. Each guide groove extends along the length direction of the first conveyor belt. The number of guide grooves is the same as the number of welding strips in each group of welding strips and corresponds one-to-one. Each guide groove is used to guide the rear section of the corresponding welding strip. The battery cell stringing device as described in claim 5 is characterized in that, The first support plate is further provided with a first negative pressure component at a location corresponding to at least one of the battery cell placement area, the welding ribbon placement area and the stacking area. A first through hole is provided on the first conveyor belt along its length direction. The first negative pressure component is used to provide adsorption force for the battery cells passing through the first through hole above the first negative pressure component, so that the first conveyor belt can adsorb the battery cells. The battery cell stringing device as described in claim 4 is characterized in that, The conveying device further includes a second conveying section, which is disposed below the conveying surface of the first conveyor belt and located in the rear section of the stacking area; the second conveying section includes a second conveyor belt, which conveys in the same direction as the first conveyor belt and conveys synchronously, with the first conveyor belt attached above the conveying surface of the second conveyor belt, and the first conveyor belt is used to convey battery string segments from the stacking area to the second conveyor belt, so that the battery string segments are supported by the second conveyor belt; or, The conveying device further includes a second conveying section, which includes a second conveyor belt. The input end of the second conveyor belt is connected to the output end of the first conveyor belt. The first conveyor belt is used to convey battery string segments from the stacked area onto the second conveyor belt, so that the battery string segments are supported by the second conveyor belt. The battery cell stringing device as described in claim 7 is characterized in that, The second conveying unit further includes a second support plate located below the conveying surface of the second conveyor belt, the second support plate being used to support the conveying surface of the second conveyor belt. The battery cell stringing device as described in claim 8 is characterized in that, The second support plate is provided with a second negative pressure component, and the second conveyor belt is provided with a second through hole along its length. The second negative pressure component is used to provide adsorption force for the second through hole above the second negative pressure component, so that the second conveyor belt can adsorb the battery cell. The battery cell stringing device as described in claim 7 is characterized in that, The second conveyor belt is a Teflon belt. The battery cell stringing device as described in claim 7 is characterized in that, The connecting device is disposed above and / or below the second conveying section, and the connecting device is any one of infrared light box, ultraviolet light box, laser heating element, and electromagnetic heating element. The battery cell stringing device as described in claim 1 is characterized in that, The battery cell stringing device further includes a first lifting drive module and a first translation drive module, wherein... The first lifting drive module is used to drive each of the transfer mechanisms to lift individually or simultaneously; The first translation drive module is used to drive each of the transfer mechanisms to translate along the first direction and adjust the distance between two adjacent transfer mechanisms. The battery cell stringing device as described in claim 1 is characterized in that, The second conveying device includes a drive assembly, a mounting bracket, n first suction assemblies, and n second suction assemblies, wherein: The mounting bracket is connected to the drive end of the drive assembly; n first suction components are mounted side by side on the first side section of the mounting bracket, and n second suction components are mounted side by side on the second side section of the mounting bracket; The drive assembly is configured to drive the mounting bracket to translate and lift, thereby causing n first suction assemblies to respectively pick up one of the battery cells and place the picked-up battery cells in the battery cell placement area; and to drive n second suction assemblies to respectively pick up one of the presses and place the picked-up presses on the front portion of a set of corresponding solder strips located in the solder strip placement area, so as to press the solder strips below onto the battery cells. The battery cell stringing device as described in claim 1 is characterized in that, The second conveying device includes a first conveying mechanism and a second conveying mechanism, wherein: The first conveying mechanism includes a first driving component, a first mounting bracket, and n first suction components. The first mounting bracket is connected to the driving end of the first driving component, and the n first suction components are mounted on the first mounting bracket. The first drive component is configured to drive the first mounting bracket to translate and lift, so as to drive the n first suction components to respectively suction one of the battery cells and place the suctioned battery cells in the battery cell placement area; The second conveying mechanism includes a second drive assembly, a second mounting bracket, and n second suction assemblies. The second mounting bracket is connected to the drive end of the second drive assembly, and the n second suction assemblies are mounted on the second mounting bracket. The second drive component is configured to drive the second mounting bracket to translate and lift, so as to drive n second suction components to respectively suction one of the presses and place the suction presses on the front part of a set of corresponding solder strips located in the solder strip placement area, so as to press the solder strips below onto the battery cell. The battery cell stringing device as described in claim 1 is characterized in that, The battery cell stringing equipment also includes a ribbon slitting device, which is configured to slit m ribbons extending along a first direction into n groups of ribbons with predetermined lengths, each group of ribbons including m ribbons. The first conveying device includes n solder strip picking components for picking up n sets of solder strips in a one-to-one correspondence. The n solder strip picking components are configured to move synchronously and have adjustable spacing to pick up n sets of solder strips from the solder strip slitting device and to lay the n sets of solder strips in a one-to-one correspondence onto n battery cells located in the solder strip placement area. The battery cell stringing device as described in claim 1 is characterized in that, The battery cell stringing equipment also includes a battery cell conveying device and a press conveying device, wherein: The cell conveying device is configured to convey cells to the side of the cell placement area. The second transport device is configured to pick up n cells from the cell conveying device and place the n cells in the cell placement area. The press conveying device is configured to convey presses to the side of the ribbon placement area. The second transport device is configured to pick up n presses from the press conveying device and place the picked-up n presses one by one onto the n cells located in the ribbon placement area. The battery cell stringing device as described in claim 16 is characterized in that, The cell conveying device and the press conveying device are arranged side by side along the first direction on the side of the first conveying section, and the output end of the cell conveying device is close to the output end of the press conveying device. The second transport device is configured to simultaneously pick up n battery cells and n pressure fixtures from the output end of the battery cell transport device and the output end of the pressure fixture transport device, respectively, and place the picked-up n battery cells in the battery cell placement area, while simultaneously laying the picked-up n pressure fixtures one by one onto the n battery cells located in the solder strip placement area. A method for stringing battery cells, used to connect battery cells and solder strips in series to form a battery string, characterized in that, The method for stringing battery cells includes: The n solar cells of the i-th batch are moved from the solar cell placement area to the solder ribbon placement area; The n sets of solder ribbons in the i-th batch are laid one-to-one onto the n cells in the i-th batch located in the solder ribbon placement area, wherein the front part of each set of solder ribbons is laid on the corresponding cell, and the rear part of each set of solder ribbons extends backward onto the corresponding cell. Place the n solar cells of the (i+1)th batch into the empty solar cell placement area; The n fixtures of the i-th batch are placed one by one on the front part of the n groups of solder strips of the i-th batch located in the solder strip placement area to form n stacked units composed of battery cells, solder strips and fixtures in the solder strip placement area. Transport the (i-1)th battery string segment from the stacking area to the serial connection area; The n stacking units in the solder ribbon placement area are moved to the empty stacking area and stacked, 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. The n solar cells of the (i+1)th batch in the solar cell placement area are moved to the empty solder strip placement area; The (i-1)th battery string segment transported to the series connection area is heated or exposed to light, so that the battery cells in the (i-1)th battery string segment are welded and / or glued to the solder strip; Where n≥2, i≥2, the cell placement area, the ribbon placement area, the stacking area and the series connection area are arranged sequentially along the first direction. The method for stringing battery cells as described in claim 18 is characterized in that, During the process of moving the n cells of the i-th batch from the cell placement area to the ribbon placement area, the n cells of the i-th batch are spaced apart so that space is left between two adjacent cells to accommodate the rear portion of the ribbon.

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