Photovoltaic cell string manufacturing system and photovoltaic module

Abstract

The utility model provides a photovoltaic cell string manufacturing system and a photovoltaic assembly, and belongs to the photovoltaic technical field, the photovoltaic cell string manufacturing system comprises a cell sheet preparation unit, the cell sheet preparation unit is at least used for passivating the side wall of a cell prefabricated product to obtain a photovoltaic cell, and the side wall of the photovoltaic cell at least comprises a passivation layer; and the battery string preparation unit is used for arranging and connecting the photovoltaic batteries output by the battery piece preparation unit to form a battery string. The photovoltaic cell string manufacturing system of the utility model can avoid damage of a surface passivation layer caused by first passivation and then cutting fragmentation in a traditional process, can improve the conversion efficiency of a photovoltaic cell, can complete the preparation of a cell string, and is also helpful for improving the power of a photovoltaic module.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component manufacturing, in particular to a photovoltaic cell string manufacturing system and a photovoltaic component. Background Art

[0002] In the battery strings of photovoltaic modules, the use of half-cell batteries for welding to form battery strings has been widely used in the industry.

[0003] Currently, the battery cell stringing process uses whole cells that have not been cut or divided. Before being arranged to form a battery string, the whole cell is first cut and divided into two different half-cell cells, and then the half-cell cells are arranged and welded in series to form a battery string.

[0004] However, the cutting of the entire cell when arranging it to form a cell string will cause the passivation layer on the surface of the cell to fail, resulting in increased carrier recombination, causing the efficiency of the cell to decrease and the production efficiency of the photovoltaic module to decrease. Utility Model Content

[0005] The utility model provides a photovoltaic cell string manufacturing system and a photovoltaic module, aiming to partially or completely solve the problem that the photovoltaic cell cutting process during the preparation of the cell string causes the failure of the passivation layer on the surface of the cell, resulting in increased carrier recombination and reduced efficiency of the cell.

[0006] In a first aspect, the utility model provides a photovoltaic cell string manufacturing system, comprising:

[0007] A cell preparation unit, the cell preparation unit is used at least to perform a passivation treatment on the side wall of the cell preform to obtain a photovoltaic cell, the side wall of the photovoltaic cell at least comprising a passivation layer;

[0008] A battery string preparation unit, the battery string preparation unit is used to arrange and connect the photovoltaic cells output by the battery cell preparation unit to form a battery string;

[0009] The cell preparation unit prepares a plurality of the photovoltaic cells, and the plurality of photovoltaic cells include a first photovoltaic cell and a second photovoltaic cell; the cell string preparation unit includes: a first discharging device, used to output a plurality of the first photovoltaic cells one by one; a second discharging device, used to output a plurality of the second photovoltaic cells one by one; and a swinging device, used to place the first photovoltaic cell and the second photovoltaic cell together to form a cell combination unit.

[0010] Optionally, the cell preparation unit comprises a segmentation device and a passivation device, and the segmentation device is arranged on a feeding path of the passivation device;

[0011] The segmentation device is used to segment a whole silicon wafer to obtain segmented silicon wafers, and the segmented silicon wafers are used to prepare the battery preform; or, the segmentation device is used to segment a whole battery wafer to obtain the battery preform; the passivation device is at least used to passivate the battery preform to obtain the photovoltaic cell.

[0012] Optionally, the cell preparation unit further includes a texturing device, a passivation device, and an electrode preparation device arranged in sequence; or, the cell preparation unit further includes a texturing device, a coating device, and an electrode preparation device, and the segmentation device is arranged after the coating device.

[0013] Optionally, the sheet swinging device includes a picking mechanism, and the picking mechanism is used to place the second photovoltaic cell in the inter-sheet space between two adjacent first photovoltaic cells to form the battery combination unit.

[0014] Optionally, the battery string preparation unit further includes: an arranging device for linearly arranging a plurality of the battery combination units to form a battery string unit; or, the arranging device for linearly arranging a plurality of the battery combination units and one of the first photovoltaic cell or the second photovoltaic cell to form a battery string unit.

[0015] Optionally, the sheet arrangement device includes a sheet arrangement mechanism and at least one string arrangement platform; the sheet arrangement mechanism is used to linearly arrange the multiple battery combination units on the string arrangement platform to form the battery string unit; or, the sheet arrangement mechanism is used to linearly arrange the multiple battery combination units and one of the first photovoltaic cells or the multiple battery combination units and one of the second photovoltaic cells on the string arrangement platform to form the battery string unit.

[0016] Optionally, the cell arrangement device comprises two cell string arrangement platforms, and the cell arrangement mechanism arranges the cell string units alternately on the two cell string arrangement platforms;

[0017] And / or, the battery string preparation unit further includes a welding device, which connects the battery string units and interconnecting bars to form the battery string;

[0018] And / or, at least one of the first discharging device and the second discharging device further includes a correction mechanism, and the correction mechanism is used to adjust the positions of the plurality of first photovoltaic cells and / or the plurality of second photovoltaic cells so that the plurality of first photovoltaic cells and / or the plurality of second photovoltaic cells are arranged neatly.

[0019] Optionally, the swing device includes a first picking mechanism, a second picking mechanism and a conveying platform; the first picking mechanism is used to place the first photovoltaic cell on the conveying platform, and the second picking mechanism is used to place the second photovoltaic cell on the conveying platform; the first picking mechanism and the second picking mechanism act alternately in sequence so that the first photovoltaic cell and the second photovoltaic cell form the battery combination unit.

[0020] In a second aspect, the utility model provides a photovoltaic module, which includes a battery string, wherein the battery string includes a plurality of photovoltaic cells and a plurality of interconnecting strips, wherein the plurality of interconnecting strips are connected to a plurality of arranged photovoltaic cells to form the battery string, wherein the side walls of the photovoltaic cells include a passivation layer, the interconnecting strips are at least partially in contact with the passivation layer, and the interconnecting strips are at least partially located on the upper side or the lower side of the passivation layer.

[0021] Optionally, along the first direction, the multiple photovoltaic cells include an adjacent first photovoltaic cell and a second photovoltaic cell, and the distance between the passivation layer of the side wall of the first photovoltaic cell and the passivation layer of the adjacent side wall of the second photovoltaic cell is D, satisfying: D is greater than 0 mm and less than or equal to 3 mm; and / or the passivation layer includes at least one of aluminum oxide, silicon nitride, silicon oxide, silicon oxynitride, silicon carbide, and an organic passivation material.

[0022] In the photovoltaic cell string manufacturing system of the utility model, the cell preparation unit is used to advance the cell cutting and slicing process to before the passivation process, which can avoid the damage to the surface passivation layer caused by the traditional process of first passivation and then cutting and slicing, and then the photovoltaic cells are directly arranged and connected to form a cell string by the cell string preparation unit. In this photovoltaic cell string manufacturing system, the cell cutting and slicing process is transferred from the string welding machine to the cell preparation unit process, which can avoid the damage to the surface passivation layer caused by the traditional process of first passivation and then cutting and slicing, which can improve the conversion efficiency of the photovoltaic cells, and the arrangement and combination are coordinated and synchronized with the production rhythm of the cell string and the photovoltaic module, thereby improving the production efficiency of the photovoltaic module, and a cell string with higher output power can also be obtained, which helps to improve the power of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1A simplified schematic diagram of a photovoltaic cell string manufacturing system in an embodiment of the present utility model is shown;

[0025] Figure 2 A simplified schematic diagram of another photovoltaic cell string manufacturing system in an embodiment of the present utility model is shown;

[0026] Figure 3 A schematic diagram of a main grid of a whole cell sheet in an embodiment of the utility model is shown;

[0027] Figure 4 A schematic diagram of a passivation layer on the side wall of a photovoltaic cell in an embodiment of the utility model is shown;

[0028] Figure 5 A three-dimensional schematic diagram of a battery string preparation unit in an embodiment of the utility model is shown;

[0029] Figure 6 The utility model embodiment is shown Figure 5 A schematic top view of a battery string preparation unit;

[0030] Figure 7 A schematic diagram showing a first arrangement of different photovoltaic cells in an embodiment of the utility model is shown;

[0031] Figure 8 A second schematic diagram of placing different photovoltaic cells in an embodiment of the utility model is shown;

[0032] Fig. 9 A three-dimensional schematic diagram of another battery string preparation unit in an embodiment of the utility model is shown;

[0033] Fig.10 The utility model embodiment is shown Fig. 9 A schematic top view of a battery string preparation unit;

[0034] Fig.11 A top view schematically shows another battery string preparation unit in an embodiment of the utility model.

[0035] Description of reference numerals:

[0036] Cell preparation unit-10, cell string preparation unit-11, photovoltaic cell-20, first photovoltaic cell-20a, second photovoltaic cell-20b, passivation layer-201, cell assembly unit-30, segmentation device-101, passivation device-102, texturing device-103, diffusion device-104, back side PSG removal device-105, back side alkali polishing device-106, front side PSG removal device-107, electrode preparation device-108, Coating device 109, sheet swinging device 112, sheet arranging device 113, battery cell basket 111a, conveying mechanism 111b, straightening mechanism 111c, first discharging device 1111, second discharging device 1112, picking mechanism 1121, robot arm 1122, first picking mechanism 1123, second picking mechanism 1124, conveying platform 1125, sheet arranging mechanism 1131, stringing platform 1132. DETAILED DESCRIPTION

[0037] The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the utility model.

[0038] Scope of new types of protection.

[0039] Reference Figures 1 to 4 In the first aspect, an embodiment of the utility model provides a photovoltaic cell string manufacturing system, comprising: a cell preparation unit 10, the cell preparation unit 10 is at least used for passivating the side wall of the cell preform to obtain a photovoltaic cell, the side wall of the photovoltaic cell at least includes a passivation layer; a cell string preparation unit 11, the cell string preparation unit 11 is used to arrange and connect the photovoltaic cells output by the cell preparation unit 10 to form a cell string.

[0040] In some embodiments, Figure 1 As shown, in order to obtain photovoltaic cells, the cell preparation unit 10 can directly cut the silicon rod into squares and slices and then directly output the sliced ​​silicon wafers, or the cell preparation unit 10 can first cut the silicon rod into squares and slices to obtain square whole silicon wafers, and then scribe and cut the square whole silicon wafers to obtain sliced ​​silicon wafers. The sliced ​​silicon wafers can be of different sizes, such as half, one third, one quarter or one eighth of the whole silicon wafer.

[0041] The above-mentioned sliced ​​silicon wafers can be used as raw materials for manufacturing photovoltaic cells. The cell preparation unit 10 performs at least one treatment such as texturing, diffusion, and electrode preparation on them to obtain a cell preform. At this time, the side wall of the cell preform lacks a passivation layer, so it is necessary to at least perform a passivation treatment on it by the cell preparation unit 10 to form a passivation layer on the side wall of the cell preform. Therefore, the cell preform with the passivation layer finally forms a photovoltaic cell.

[0042] In other embodiments, in order to obtain photovoltaic cells, the cell preparation unit 10 can process the whole silicon wafer obtained after squaring and slicing, and output the photovoltaic cells. Specifically, in the process of preparing photovoltaic cells, the cell preparation unit 10 can first perform at least one treatment such as texturing, diffusion, electrode preparation, passivation, etc. on the whole silicon wafer to obtain a whole cell. The whole cell is a whole cell that has not been passivated or a whole cell that has been passivated. Then the whole cell is cut to obtain a cut and divided cell preform. The cell preform can be of different sizes such as one-half, one-third, one-quarter or one-eighth of the whole cell. At this time, the side wall of the cell preform lacks a passivation layer, and the cell preform is a semi-finished product on which a passivation layer is not formed on the side wall of the cell. Then the cell preparation unit 10 performs a passivation treatment on the above-mentioned cell preform to complete the preparation of the photovoltaic cell.

[0043] like Figure 3 As shown, a schematic diagram of two different photovoltaic cells 20 from the same whole silicon wafer is given. The battery string preparation unit 11 of the embodiment of the utility model can be used to arrange these two different photovoltaic cells 20. Specifically, in combination with Figure 3 As shown in the figure, this photovoltaic cell 20 can be two parts from the same whole silicon wafer. For example, the first photovoltaic cell 20a is the upper half of the whole silicon wafer, and the second photovoltaic cell 20b is the lower half of the whole silicon wafer. The difference between the two photovoltaic cells 20 is that they have different electrode structures, that is, when the chamfered parts of the two photovoltaic cells 20 are overlapped and stacked together, the main grid properties of the same parts of the two are not completely consistent. For example, the main grids on both sides of the edge of the first photovoltaic cell 20a are negative main grids (the thick dotted lines in the figure), and the main grids on both sides of the edge of the second photovoltaic cell 20b are positive main grids (the thick solid lines in the figure). Therefore, when placing this type of photovoltaic cell 20, it is necessary to arrange it in order according to the circuit design requirements of the battery string. In addition, if Figure 4 As shown, the passivation layer 201 located at the side wall of the photovoltaic cell 20 is schematically shown by cutting the side of the photovoltaic cell 20 .

[0044] The prepared photovoltaic cells 20 are then arranged and connected by the cell string preparation unit 11 in the order required by the circuit design of the cell string to form a cell string.

[0045] Therefore, in the photovoltaic cell string manufacturing system of the embodiment of the utility model, the cell preparation unit is used to advance the cell cutting and slicing process to before the passivation process, which can avoid the damage to the surface passivation layer caused by the traditional process of first passivation and then cutting and slicing, and then the photovoltaic cells are directly arranged and connected to form a cell string by the cell string preparation unit. In this photovoltaic cell string manufacturing system, the cell cutting and slicing process is transferred from the existing string welding machine to the cell preparation unit process, which can avoid the damage to the surface passivation layer caused by the traditional process of first passivation and then cutting and slicing, which can improve the conversion efficiency of the photovoltaic cells, and subsequently arrange and combine to coordinate and synchronize with the production rhythm of the cell string and photovoltaic modules, to obtain a cell string with higher output power, improve the production efficiency of photovoltaic modules, and also help to increase the power of photovoltaic modules.

[0046] Optionally, refer to Figure 1 or Figure 2 The cell preparation unit 10 includes a splitting device 101 and a passivation device 102, wherein the splitting device 101 is arranged on the feeding path of the passivation device 102; the splitting device 101 is used to split the whole silicon wafer to obtain the split silicon wafers, and the split silicon wafers are used to prepare the cell preform; or, the splitting device 101 is used to split the whole cell wafer to obtain the cell preform, and the passivation device 102 is at least used to passivate the cell preform to obtain the photovoltaic cell.

[0047] In some embodiments, Figure 1 or Figure 2 As shown, the cell preparation unit 10 in the embodiment of the utility model may include a segmentation device 101 and a passivation device 102. The feed end of the segmentation device 101 is connected to the supply device of the whole silicon wafer, and is used to receive the whole silicon wafer, and segment the whole silicon wafer to obtain segmented silicon wafers. At the same time, the segmentation device 101 is also located on the feed path of the passivation device 102. After the segmentation device 101 completes the cutting and segmentation of the silicon wafer, the segmented silicon wafer is subjected to at least one treatment such as texturing, diffusion, back PSG, etc. to obtain a cell preform, and is transferred to the passivation device 102, and the passivation device 102 forms a passivation layer at least on the side wall of the cell preform. The passivation device 102 may be a device corresponding to the chemical vapor deposition process, which can deposit to form a passivation layer.

[0048] In other embodiments, the cell preparation unit 10 in the embodiment of the utility model may include a segmentation device 101 and a passivation device 102. The feed end of the segmentation device 101 is connected to the manufacturing end of the whole cell, and is used to receive the whole cell, and segment the whole cell to obtain a battery preform. At the same time, the segmentation device 101 is also located on the feed path of the passivation device 102. After the segmentation device 101 completes the cutting and segmentation of the whole cell, a battery preform is obtained and transferred to the passivation device 102. The passivation device 102 also forms a passivation layer at least on the side wall of the battery preform. Similarly, the passivation device 102 can be a device corresponding to the chemical vapor deposition process, which can deposit a passivation layer.

[0049] Combined with the description of the above-mentioned embodiment, it can be understood that in the embodiment of the utility model, the above-mentioned battery preform comes from the split silicon wafer, that is, the output product of the split silicon wafer after at least one treatment such as texturing, diffusion, back PSG, etc. When the above-mentioned battery preform comes from the whole battery slice, since the whole battery slice has completed at least one treatment process such as texturing, diffusion, coating, electrode preparation, etc., the battery preform is the product after the whole battery slice is divided into sizes. It should be noted that the passivation treatment belongs to the conventional process in the existing battery slice manufacturing process. The photovoltaic cell can at least mean: a solar cell including a sidewall passivation layer, and the solar cell can be at least half a solar cell. Exemplarily, the segmentation device 101 may include a dicing machine and a splitting machine; the dicing machine is used to form a groove on the surface of the whole silicon wafer, and the splitting machine is used to split the whole silicon wafer into the split silicon wafer along the groove. Specifically, the segmentation device 101 in the embodiment of the utility model may include a dicing machine and a splitting machine. The dicing machine can be a machine that uses a laser to scribing on the surface of the whole silicon wafer to form a groove. The wafer splitting machine can apply force to the positions on both sides of the groove, so that the whole silicon wafer is split into two or more silicon wafers along the groove.

[0050] Optionally, the cell preparation unit further includes a texturing device, a passivation device, and an electrode preparation device arranged in sequence; or, the cell preparation unit further includes a texturing device, a coating device, and an electrode preparation device, and the segmentation device is arranged after the coating device.

[0051] Exemplarily, the cell preparation unit 10 also includes a texturing device 103, a diffusion device 104, a back side PSG removal device 105, a back side alkali polishing device 106, a front side PSG removal device 107, and an electrode preparation device 108 which are arranged in sequence. The passivation device 102 is arranged between the front side PSG removal device 107 and the electrode preparation device 108. The segmentation device 102 can be arranged before the texturing device 103 or after the texturing device 103.

[0052] For example, refer to Figure 2 The cell preparation unit 10 also includes a texturing device 103, a diffusion device 104, a back side PSG removal device 105, a back side alkali polishing device 106, a front side PSG removal device 107, a coating device 109, and an electrode preparation device 108, which are arranged in sequence. The segmentation device 101 is arranged after the coating device 109, and the segmentation device 101 is arranged before the passivation device 102.

[0053] It should be noted that the sequential arrangement at least means that the texturing device, the passivation device, and the electrode preparation device are in a sequential order as a whole, and other devices can still be arranged between them. Technicians can arrange them according to actual conditions, and the embodiments of the utility model do not limit this.

[0054] In some embodiments, Figure 1 As shown, in the embodiment of the utility model, the cell preparation unit 10 may also include a texturing device 103, a diffusion device 104, a back side PSG removal device 105, a back side alkali polishing device 106, a front side PSG removal device 107, and an electrode preparation device 108 arranged in sequence.

[0055] After the whole silicon wafer is divided by the dividing device 101, the sliced ​​silicon wafers are obtained. The sliced ​​silicon wafers are first processed by the texturing device 103. The hydrofluoric acid in the texturing device 103 corrodes the surface of the whole silicon wafer to form a pyramid-shaped velvet structure, which reduces the reflectivity of sunlight. The whole silicon wafer after texturing is then diffused with phosphorus on its surface by the diffusion device 104 to form a PN junction. Since phosphorus is also diffused on the edge of the whole silicon wafer during the diffusion process, a conductive state can be formed. However, this conductive state will cause a short circuit of the battery cell. In addition, PSG (Phospho Silicate Glass) will also be formed during the diffusion process. PSG will cause the attenuation of the current and power of the battery cell and produce color difference. Therefore, after the diffusion process, the back side PSG removal device 105 cleans and removes the back side phosphorus silicon glass. Then, in the back alkali polishing device 106, an alkali solution is used to perform back alkali polishing on the sliced ​​silicon wafer, and the back of the slice is polished. During the back alkali polishing process, the alkali solution contacts the edge of the sliced ​​silicon wafer, and the alkali solution corrodes the damaged layer at the edge of the slice, and removes the damaged layer at the edge of the slice. The alkali solution can be selected from potassium hydroxide solution or sodium hydroxide solution. Then, the front PSG removal device 107 cleans and removes the phosphosilicate glass on the front. Thus, the corresponding battery preform can be obtained after processing the sliced ​​silicon wafer. Then, the passivation device 102 between the front PSG removal device 107 and the electrode preparation device 108 can be used to deposit a passivation layer on the side wall of the battery preform. Finally, a metal electrode is prepared using a screen printing machine and a sintering machine in the electrode preparation device 108, and the preparation of the photovoltaic cell is finally completed.

[0056] like Figure 2 As shown, in other embodiments, the cell preparation unit 10 further includes a texturing device 103, a diffusion device 104, a backside PSG removal device 105, a backside alkali polishing device 106, a frontside PSG removal device 107, a coating device 109, and an electrode preparation device 108 arranged in sequence. The segmentation device 101 is arranged after the coating device 109, which means that the segmentation device 101 is arranged before the passivation device 102, and the segmentation device 101 is arranged after the coating device 109. Accordingly, even if the whole cell is passivated after the coating treatment by the coating device 109, the segmentation device 101 can still be used to segment the whole cell to obtain a cell preform. At this time, since the exposed side wall portion of the cell preform after segmentation does not have a passivation layer, the passivation device 102 can be used to passivate the cell preform, and a passivation layer is formed on its side wall to obtain a photovoltaic cell.

[0057] It should be noted that the cell preparation unit 10 in the photovoltaic cell string manufacturing system of the embodiment of the utility model can be used to prepare SE (selective emitter) photovoltaic cells, BSF (Aluminum Back Surface Field) photovoltaic cells, PERC (Passivated Emitter and Rear Contact) photovoltaic cells, SE-PERC cells, PERL (Passivated Emitter and Rear Locally-diffused) photovoltaic cells, PERT (Passivated Emitter Rear Totally-diffused), TOPCon (Tunnel Oxide Passivated Contact) photovoltaic cells, IBC (Interdigitated Back Contact) photovoltaic cells or MWT (Metal Wrap Through) photovoltaic cells. The common point is that they are cut into pieces first and then passivated. The process differences of different types of cells are not described in detail in the embodiment of the utility model.

[0058] Optionally, refer to Figure 5 and Figure 6 The cell preparation unit 10 prepares a plurality of the photovoltaic cells, and the plurality of the photovoltaic cells include a first photovoltaic cell 20a and a second photovoltaic cell 20b; the cell string preparation unit 11 includes: a first discharging device 1111, used to output a plurality of the first photovoltaic cells 20a one by one; a second discharging device 1112, used to output a plurality of the second photovoltaic cells 20b one by one; and a swinging device 112, used to place the first photovoltaic cell 20a and the second photovoltaic cell 20b together to form a battery combination unit 30.

[0059] Exemplarily, the cell preparation unit 10 can prepare a plurality of photovoltaic cells 20, the plurality of photovoltaic cells 20 include a first photovoltaic cell 20a and a second photovoltaic cell 20b, and a cell string can be prepared in an arrangement in which the first photovoltaic cell 20a and the second photovoltaic cell 20b are arranged alternately. It is easy to understand that for such a cell string, the cell combination units 30 formed by aligning and placing the first photovoltaic cell 20a and the second photovoltaic cell 20b together can be arranged linearly.

[0060] like Figure 5 and Figure 6As shown in the diagram, in the embodiment of the utility model, two different types of battery cells are each equipped with a discharge device 111, and the two discharge devices 111 output the corresponding battery cells independently without interfering with each other. For example, the first discharge device 1111 is used to output a plurality of first photovoltaic cells 20a of the overall package one by one, and the second discharge device 1112 is used to output a plurality of second photovoltaic cells 20b of the overall package one by one. The discharge device 111 is a functional module that can output the photovoltaic cells 20 in the battery cell basket one by one. Its specific mechanical structure can be a combination of various drive and transmission mechanisms, which is not limited in the embodiment of the utility model.

[0061] After the discharging device 111 outputs the photovoltaic cell 20, the swing device 112 arranged next to the discharging device 111 can take and place the photovoltaic cell 20, so that the first photovoltaic cell 20a and the second photovoltaic cell 20b are placed together to form a Figure 7 or Figure 8 The battery assembly unit 30. The swing device 112 is a motion mechanism with multiple degrees of freedom and a pickup mechanism, which can pick up and place the photovoltaic cells 20 output from the discharge device 111. Its specific mechanical structure can be a combination of various driving and transmission mechanisms, which is not limited in the embodiment of the utility model.

[0062] It should be noted that in Figure 7 In the embodiment, the first photovoltaic cell 20a has two chamfered sides adjacent to the second photovoltaic cell 20b without chamfered sides. Figure 8 In the figure, the first photovoltaic cell 20a has two chamfered sides which are adjacent to the second photovoltaic cell 20b has two chamfered sides. The first photovoltaic cell 20a and the first photovoltaic cell 20b may also have no chamfers. These ways of placing them together can also be achieved by setting a rotating mechanism on the swing device 112 to change the direction of the cell sheets. The utility model does not elaborate on this. The focus is on utilizing the swing device 112 in conjunction with the two discharging devices 111 to achieve the combination of the first photovoltaic cell 20a and the second photovoltaic cell 20b.

[0063] Therefore, the battery string preparation unit 10 of the embodiment of the utility model utilizes two non-interfering discharge devices 111 to independently output the two photovoltaic cells 20, and then the swing device 112 combines the two photovoltaic cells 20 into a battery combination unit 30, which can accurately and orderly arrange different photovoltaic cells 20 in the designed order, and then can coordinate and synchronize with the production rhythm of the battery strings and photovoltaic modules, and can improve the production efficiency of the photovoltaic modules.

[0064] Optionally, refer to Figure 5 and Figure 6The swinging device 112 includes a picking mechanism 1121, and the picking mechanism 1121 is used to place the second photovoltaic cell 20b in the inter-sheet space between two adjacent first photovoltaic cells 20a to form the battery combination unit 30.

[0065] Specifically, if Figure 5 and Figure 6 As shown, the swinging device 112 in the embodiment of the utility model can be a mechanism provided with motion power by a multi-degree-of-freedom mechanical arm 1122, and a picking mechanism 1121 is connected to the end of the mechanical arm 1122, and the picking mechanism 1121 can be a mechanism with a negative pressure suction cup. The picking mechanism 1121 can move between the first discharging device 1111 and the second discharging device 1112 under the drive of the mechanical arm 1122.

[0066] Combination Figure 6 The schematic diagram of the utility model embodiment of the present invention is used to illustrate the process of placing two types of battery cells together to form a combination. The first discharging device 1111 outputs multiple first photovoltaic cells 20a one by one. The discharging frequency of the first discharging device 1111 can be controlled to intermittently output multiple first photovoltaic cells 20a one by one, so that an inter-sheet space for accommodating the second photovoltaic cell 20b is formed between the two first photovoltaic cells 20a outputted front and rear. At the same time, the second discharging device 1112 continuously outputs the second photovoltaic cells 20b one by one, and the robotic arm 1122 drives the picking mechanism 1121 to absorb the second photovoltaic cell 20b and insert it into the inter-sheet space between the two first photovoltaic cells 20a according to the trajectory of the dotted arrow shown in the figure, thereby combining the first photovoltaic cell 20a and the second photovoltaic cell 20b to obtain a battery combination unit 30, combined with Figure 8 As shown in FIG. 1 , the battery assembly unit 30 includes a first photovoltaic cell 20a and a second photovoltaic cell 20b. Referring to the description of the above embodiment, the battery assembly unit 30 may be Figure 5 or Figure 6 The arrangement combination form or the arrangement combination form in which all photovoltaic cells have no chamfers can be coordinated and synchronized with the production rhythm of battery strings and photovoltaic modules, which can improve the production efficiency of photovoltaic modules.

[0067] Optionally, refer to Figure 5 and Figure 6 The battery string preparation unit further includes: an arrangement device 113, which is used to linearly arrange multiple battery combination units 30 to form a battery string unit, or the arrangement device 113 linearly arranges multiple battery combination units 30 and a first photovoltaic cell 20a or a second photovoltaic cell 20b to form a battery string unit.

[0068] Specifically, combined Figure 5 and Figure 6 The battery string preparation unit in the embodiment of the utility model further includes a sheet arrangement device 113, which can arrange multiple battery combination units 30 linearly to form a designed battery string unit. Figure 4 As shown in FIG. 1 , a battery string unit may include a plurality of battery assembly units. Thus, the battery assembly unit 30 may be automatically prepared into a battery string unit by using the sheet arrangement device 113 .

[0069] Optionally, refer to Figure 5 and Figure 6 The sheet arrangement device 113 includes a sheet arrangement mechanism 1131 and at least one string arrangement platform 1132; the sheet arrangement mechanism 1131 is used to linearly arrange multiple battery combination units 30 on the string arrangement platform 1132 to form the battery string unit; or, the sheet arrangement mechanism 1131 is used to linearly arrange multiple battery combination units 30 and one of the first photovoltaic cells 20a or one of the second photovoltaic cells 20b on the string arrangement platform 1132 to form the battery string unit.

[0070] In some embodiments, the number of photovoltaic cells 20 in the battery string unit is an even number. Figure 5 and Figure 6 As shown in the figure, the battery string preparation unit in the embodiment of the utility model also includes a sheet arrangement device 113, and the sheet arrangement mechanism 1131 linearly arranges the multiple battery combination units 30 on the string arrangement platform 1132 to form a battery string unit, that is, the sheet arrangement device 113 can linearly arrange the multiple battery combination units 30 into a row to form the designed battery string unit, thereby utilizing the sheet arrangement device 113 to automatically realize the preparation process of the battery combination unit 30 to the battery string unit, so that it can be used for the subsequent preparation of even-numbered battery strings.

[0071] In some other embodiments, the number of photovoltaic cells in the battery string unit is an odd number. Figure 5 and Figure 6As shown in the figure, the battery string preparation unit in the embodiment of the utility model also includes a sheet arrangement device 113, the sheet arrangement mechanism 1131 first arranges multiple battery combination units 30 linearly on the string arrangement platform 1132, and then continues to linearly arrange one of the first photovoltaic cells 20a or one of the second photovoltaic cells 20b on the string arrangement platform 1132, thereby forming the above-mentioned battery string unit, that is, the sheet arrangement device 113 can linearly arrange multiple battery combination units 30 and one of the first photovoltaic cells 20a or one of the second photovoltaic cells 20b into a row to form the designed battery string unit, wherein one of the first photovoltaic cells 20a or one of the second photovoltaic cells 20b can be realized by controlling the sequential action flow of the sheet arrangement mechanism 1131 through a software program to pick up and arrange the first photovoltaic cell 20a or one of the second photovoltaic cells 20b, thereby using the sheet arrangement device 113 to automatically realize the preparation process of the battery combination unit 30, one of the first photovoltaic cells 20a or one of the second photovoltaic cells 20b to the battery string unit, so that it can be used for the subsequent preparation of odd-numbered battery strings.

[0072] Optionally, refer to Fig. 9 and Fig.10 The sheet arrangement device 113 includes two string arrangement platforms 1132 , and the sheet arrangement mechanism 1131 arranges the battery string units alternately on the two string arrangement platforms 1132 .

[0073] Specifically, if Fig. 9 and Fig.10 As shown, on the basis of the aforementioned embodiment, there may be two of the above-mentioned string-laying platforms 1132, and the two string-laying platforms 1132 may be used to arrange and form battery strings in different time periods. For example, after one string-laying platform 1132 is full of battery assembly units 30, the entire battery string that has been arranged by other suction cup mechanisms may be moved to the device corresponding to the next process. At the same time, the sheet-laying mechanism 1131 may continue to arrange the battery assembly units 30 on another string-laying platform 1132 to form battery string units. Thus, the sheet-laying mechanism 1131 may continuously arrange the battery string units on the two string-laying platforms 1132 in a cycle to reduce the stop waiting time, and the automatic arrangement efficiency of the battery string may be improved. It should be noted that the arrangement mechanism 1131 is similar to the mechanical structure of the aforementioned swinging piece device 112, and both may be functional modules in which the suction cup mechanism is driven by a mechanical arm to move, and the arrangement mechanism 1131 will not be described in detail here.

[0074] Optionally, the stringing platform 1132 is provided with a conveying mechanism for moving and transmitting the battery string units.

[0075] Exemplarily, conveying mechanisms such as conveyor belts and conveyor rollers can be set on the string-laying platform 1132. When the battery combination units 30 arranged on the string-laying platform 1132 meet the number of battery cells in the designed battery string, the conveying mechanism starts to run and can automatically transfer the arranged battery string to the equipment corresponding to the next subsequent process, thereby simplifying the transmission process of the battery string.

[0076] Optionally, the battery string preparation unit 11 further includes a welding device, which connects the battery string units and the interconnection bars to form a battery string.

[0077] Specifically, the welding device may include or be a conventional electromagnetic welding mechanism, an infrared welding mechanism, a hot air welding structure, or a laser welding mechanism. The interconnection strip may be a welding strip. For example, the welding strip may be a copper welding strip or a tinned copper welding strip. The welding device may connect the battery string unit and multiple interconnection strips to form a battery string.

[0078] Optionally, refer to Fig.11 The swing device 112 includes a first picking mechanism 1123, a second picking mechanism 1124 and a conveying platform 1125; the first picking mechanism 1123 is used to place the first photovoltaic cell 20a on the conveying platform 1125, and the second picking mechanism 1124 is used to place the second photovoltaic cell 20b on the conveying platform 1125; the first picking mechanism 1123 and the second picking mechanism 1124 act alternately in sequence to make the first photovoltaic cell 20a and the second photovoltaic cell 20b form the battery combination unit 30.

[0079] Specifically, in one embodiment, in addition to using Figure 5 or Fig. 9 The interpolation method of the device shown in the figure realizes the placement of two different photovoltaic cells 20 together, and can also be used Fig.11 The illustrated device realizes the placement of two different photovoltaic cells 20 together. Specifically, Fig.11 The swinging device 112 shown in the figure includes a first picking mechanism 1123, a second picking mechanism 1124 and a conveying platform 1125. The first picking mechanism 1123 and the second picking mechanism 1124 can both be suction cup mechanisms, and the two picking mechanisms can be driven independently by two mechanical arms, and their respective movements do not interfere with each other. Fig.11 The dotted arrow track shows that the first photovoltaic cell 20a outputted from the first discharging device 1111 is placed on the conveying platform 1125, and the second picking mechanism 1124 is arranged according to Fig.11Another dotted arrow track indicates that the second photovoltaic cell 20b outputted from the second discharging device 1112 is placed on the conveying platform 1125. It should be noted that the first picking mechanism 1123 and the second picking mechanism 1124 place the photovoltaic cell 20 on the conveying platform 1125 in an alternating manner. Thus, a battery assembly unit 30 formed by placing the first photovoltaic cell 20a and the second photovoltaic cell 20b together can be obtained on the conveying platform 1125.

[0080] While the first picking mechanism 1123 and the second picking mechanism 1124 alternately place the photovoltaic cells 20, the conveying platform 1125 also moves in a coordinated manner to transfer the placed battery assembly units 30 along the X direction shown in the figure, thereby freeing up space to receive new photovoltaic cells 20 to continue to be placed to form battery assembly units 30, and finally multiple battery assembly units 30 are arranged in a straight line on the conveying platform 1125 to form a battery string unit. Of course, in other embodiments, after the above-mentioned assembly unit 30 is formed, the above-mentioned first picking mechanism 1123, the second picking mechanism, and the sheet arrangement device 113 can still be used to cooperate with each other to linearly arrange multiple battery assembly units 30 to form a battery string unit, or the sheet arrangement device 113 can linearly arrange multiple battery assembly units 30 and a first photovoltaic cell 20a or a second photovoltaic cell 20b to form a battery string unit.

[0081] Optionally, refer to Figure 5 Each of the discharging devices 111 includes a cell basket 111a, a lifting mechanism and a conveying mechanism 111b; the cell basket 111a is provided with a storage space for stacking the photovoltaic cells 20; the lifting mechanism is connected to the cell basket 111a, and the lifting mechanism drives the half-cell batteries to be placed in the cell basket 111a to move up and down to a height flush with the conveying mechanism 111b; the conveying mechanism 111b transfers the photovoltaic cells 20 out of the cell basket 111a.

[0082] Specifically, if Figure 5As shown in the figure, the discharging device 111 in the embodiment of the utility model includes a cell basket 111a, a lifting mechanism (not shown in the figure) and a conveying mechanism 111b. The cell basket 111a is a container in the shape of a frame structure for holding photovoltaic cells 20. Photovoltaic cells 20 with the same electrode structure are stacked in the cell basket 111a, and each photovoltaic cell 20 is inserted into a corresponding slot in the cell basket 111a. The outer frame of the cell basket 111a is connected to the power output end of the lifting mechanism. When the lifting mechanism is activated, the cell basket 111a can be driven to move up and down along the Z direction shown in the figure, so that the height of the photovoltaic cells 20 to be output in the cell basket 111a can be kept consistent with the height of the conveying mechanism 111b. The photovoltaic cells 20 can be brought out by the conveying mechanism 111b with the help of friction, or the photovoltaic cells 20 can be moved out of the cell basket 111a to the conveying mechanism 111b by other push-pull mechanisms. The lifting mechanism in the embodiment of the utility model can be a cylinder, a screw slider, a gear rack and the like.

[0083] The conveying mechanism 111b may be a conveying belt, a conveying roller, or the like. The conveying mechanism 111b may operate continuously to continuously output the photovoltaic cells 20. Figure 5 As shown in the figure, for the first discharging device 111, in order to form a space between two adjacent first photovoltaic cells 20a to accommodate the second photovoltaic cell 20b, when the previous first photovoltaic cell 20a moves to a farther position and forms a spacing greater than the size of the second photovoltaic cell 20b between the opening position of the cell basket 111a, the next first photovoltaic cell 20a in the cell basket 111a is output to the conveying mechanism 111b, and is further transmitted by the conveying mechanism 111b.

[0084] Therefore, the discharging device 111 of the embodiment of the utility model can realize automatic output of photovoltaic cells, and can also control the spacing between the output photovoltaic cells according to the requirements of the placement and combination process to meet the requirements of different photovoltaic cell interpolation placement combinations.

[0085] Optionally, refer to Figure 5 At least one of the first discharging device 111a and the second discharging device 111b further includes a correcting mechanism 111c, which is arranged at one end of the conveying mechanism 111b close to the opening of the battery cell basket 111a, and the correcting mechanism 111c is used to adjust the position of the first photovoltaic cell 20a and / or the plurality of second photovoltaic cells 20b so that the plurality of first photovoltaic cells 20a and / or the plurality of second photovoltaic cells 20b are arranged neatly.

[0086] Specifically, in order to ensure that the photovoltaic cells 20 output from the cell basket 111a are arranged neatly, the cell swing device 112 can accurately obtain and precisely place the photovoltaic cells 20, such as Figure 5 As shown in the figure, in the embodiment of the utility model, a correction mechanism 111c can be provided at one end of the conveying mechanism 111b close to the opening of the solar cell basket 111a. The correction mechanism 111c can be a correction baffle driven by a cylinder to adjust the orientation of the deflected photovoltaic cell 20. In addition, the correction mechanism 111c can also include a sensor with a position detection function, so as to adjust and correct the photovoltaic cell 20 with higher precision.

[0087] It should be noted that in order to more concisely reflect the reformation mechanism 111c, Figure 5 The correcting mechanism 111c is only shown in the first discharging device 1111, and is omitted in the second discharging device 1112. The correcting mechanism 111c can also be installed in the same position in the second discharging device 1112 to adjust the orientation of the second photovoltaic cell 20b.

[0088] In some embodiments, the photovoltaic cell 20 may be a monocrystalline silicon solar cell, a polycrystalline silicon solar cell, an amorphous silicon solar cell, or a multi-compound solar cell, etc. Among them, the multi-compound solar cell may specifically be a cadmium sulfide solar cell, a gallium arsenide solar cell, a copper indium selenide solar cell, or a perovskite solar cell, etc.

[0089] In the second aspect, an embodiment of the utility model provides a photovoltaic module, which includes a cell string, the cell string includes a plurality of photovoltaic cells 20 and a plurality of interconnecting strips, the plurality of interconnecting strips are connected to a plurality of arranged photovoltaic cells 20 to form a cell string, the side wall of the photovoltaic cell 20 includes a passivation layer 201, the interconnecting strips are at least partially in contact with the passivation layer 201, and the interconnecting strips are at least partially located on the upper side or the lower side of the passivation layer 201.

[0090] Specifically, the photovoltaic module of the embodiment of the utility model may or may not include a cell string prepared by the photovoltaic cell string manufacturing system described in any one of the first aspects above, and the back panel, lower packaging film, multiple cell strings, upper packaging film, front panel, etc. can be conventionally stacked and conventionally laminated to form a laminate, and a junction box can be installed on the laminate to form a photovoltaic module, thereby preparing a photovoltaic module.

[0091] Furthermore, the battery string of the embodiment of the utility model includes a plurality of photovoltaic cells 20 and a plurality of interconnecting strips, the plurality of interconnecting strips are connected to the plurality of arranged photovoltaic cells 20 to form a battery string, the side walls of the photovoltaic cells 20 include a passivation layer 201, the interconnecting strips are at least partially in contact with the passivation layer 201, and the interconnecting strips are at least partially located on the upper side or the lower side of the passivation layer 201. Preferably, all of the plurality of interconnecting strips are located on the lower side of the passivation layer 201. In this way, the damage to the surface passivation layer caused by passivation before cutting into pieces in the traditional process can be avoided, and the passivation layer itself has insulating properties, which can prevent the interconnection strips or the tin layer of the interconnection strips from flowing to the side walls of the battery cell in the traditional process to contact the side walls of the battery cell after cutting to cause a short circuit. At the same time, the passivation layer 201 disposed on the side walls of the photovoltaic cell 20 can also avoid the leakage of the side walls of the battery cell after cutting in the traditional process, and multiple interconnection strips can all be located on the lower side of the passivation layer 201. Multiple interconnection strips can be connected to multiple arranged photovoltaic cells 20 to form a battery string, so that multiple passivation layers 201 are supported by multiple interconnection strips at basically the same height, which appropriately reduces the damage to the multiple passivation layers 201, and can also avoid the shielding of the multiple passivation layers 201 by multiple interconnection strips, thereby better improving the conversion efficiency of the photovoltaic cell and obtaining a battery string with higher output power.

[0092] It also helps to increase the power of photovoltaic modules.

[0093] Optionally, along the first direction X, the plurality of photovoltaic cells include adjacent first photovoltaic cells 20a and second photovoltaic cells 20b, and a distance D between a sidewall passivation layer of the first photovoltaic cell 20a and a sidewall passivation layer of the adjacent second photovoltaic cell 20b satisfies: D is greater than 0 mm and less than or equal to 3 mm.

[0094] Specifically, the first direction X can be a horizontal direction or a vertical direction, and the technicians can understand it according to the actual situation. The plurality of photovoltaic cells include a first photovoltaic cell 20a and a second photovoltaic cell 20b, the left and right side walls of the first photovoltaic cell 20a include a left passivation layer and a right passivation layer, the left and right side walls of the second photovoltaic cell 20b include a left passivation layer and a right passivation layer, the spacing between the side wall passivation layer of the first photovoltaic cell 20a and the adjacent side wall passivation layer of the second photovoltaic cell 20b is D: the spacing between the right side wall passivation layer of the first photovoltaic cell 20a (i.e., the right side passivation layer) and the left side wall passivation layer of the adjacent second photovoltaic cell 20b (i.e., the left side passivation layer), or the spacing between the left side wall passivation layer of the first photovoltaic cell 20a (i.e., the left side passivation layer) and the right side wall passivation layer of the adjacent second photovoltaic cell 20b (i.e., the right side passivation layer) is D, and the spacing D can be a positive value or a negative value. Preferably, the spacing D is a positive value, and the numerical range of the spacing D satisfies: greater than 0 mm and less than or equal to 3 mm, so that the arrangement relationship of multiple battery cells and the creepage distance between battery cells can be guaranteed, and the preparation yield of the battery string can also be guaranteed.

[0095] Exemplarily, the spacing D can be 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm or values ​​therebetween. The technicians can set it according to the actual situation, and the embodiments of the present utility model are not limited to this.

[0096] Optionally, the passivation layer includes at least one of aluminum oxide, silicon nitride, silicon oxide, silicon oxynitride, silicon oxycarbide, and an organic passivation material.

[0097] In the utility model application, the passivation layer 201 includes at least one of aluminum oxide, silicon nitride, silicon oxide, silicon oxynitride, silicon oxycarbide, and an organic passivation material. Accordingly, the passivation layer 201 has both carrier selective transmission characteristics and edge passivation characteristics, and also has an anti-reflection function, which can avoid passivation damage and loss on the side surface of the battery, reduce the recombination of carriers on the side of the battery, and improve the conversion efficiency of the photovoltaic cell.

[0098] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0099] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. A photovoltaic cell string manufacturing system, characterized in that: include: A cell preparation unit, the cell preparation unit is used at least to perform a passivation treatment on the side wall of the cell preform to obtain a photovoltaic cell, the side wall of the photovoltaic cell at least comprising a passivation layer; A battery string preparation unit, the battery string preparation unit is used to arrange and connect the photovoltaic cells output by the battery cell preparation unit to form a battery string; The cell preparation unit prepares a plurality of the photovoltaic cells, and the plurality of photovoltaic cells include a first photovoltaic cell and a second photovoltaic cell; the cell string preparation unit includes: a first discharging device, used to output a plurality of the first photovoltaic cells one by one; a second discharging device, used to output a plurality of the second photovoltaic cells one by one; and a swinging device, used to place the first photovoltaic cell and the second photovoltaic cell together to form a cell combination unit.

2. The photovoltaic cell string manufacturing system according to claim 1, characterized in that: The cell preparation unit comprises a segmentation device and a passivation device, wherein the segmentation device is arranged on a feeding path of the passivation device; The splitting device is used to split a whole silicon wafer to obtain split silicon wafers, and the split silicon wafers are used to prepare the battery preform; or, the splitting device is used to split a whole battery wafer to obtain the battery preform; The passivation device is at least used to passivate the cell preform to obtain the photovoltaic cell.

3. The photovoltaic cell string manufacturing system according to claim 2, characterized in that: The cell preparation unit also includes a texturing device, a passivation device, and an electrode preparation device which are arranged in sequence; Alternatively, the cell preparation unit further includes a texturing device, a coating device, and an electrode preparation device, and the segmentation device is arranged after the coating device.

4. The photovoltaic cell string manufacturing system according to claim 1, characterized in that: The sheet swinging device comprises a picking mechanism, and the picking mechanism is used to place the second photovoltaic cell in the inter-sheet space between two adjacent first photovoltaic cells to form the battery combination unit.

5. The photovoltaic cell string manufacturing system according to claim 4, characterized in that: The battery string preparation unit further includes: an arrangement device for linearly arranging a plurality of the battery combination units to form a battery string unit; or, the arrangement device for linearly arranging a plurality of the battery combination units and one of the first photovoltaic cell or the second photovoltaic cell to form a battery string unit.

6. The photovoltaic cell string manufacturing system according to claim 5, characterized in that: The sheet arrangement device includes a sheet arrangement mechanism and at least one battery string arrangement platform; the sheet arrangement mechanism is used to linearly arrange multiple battery combination units on the battery string arrangement platform to form a battery string unit; or, the sheet arrangement mechanism is used to linearly arrange multiple battery combination units and one first photovoltaic cell or multiple battery combination units and one second photovoltaic cell on the battery string arrangement platform to form a battery string unit.

7. The photovoltaic cell string manufacturing system according to claim 6, characterized in that: The cell arrangement device comprises two string arrangement platforms, and the cell arrangement mechanism arranges the battery string units alternately on the two string arrangement platforms; And / or, the battery string preparation unit further includes a welding device, which connects the battery string units and interconnecting bars to form the battery string; And / or, at least one of the first discharging device and the second discharging device further includes a correction mechanism, and the correction mechanism is used to adjust the positions of the plurality of first photovoltaic cells and / or the plurality of second photovoltaic cells so that the plurality of first photovoltaic cells and / or the plurality of second photovoltaic cells are arranged neatly.

8. The photovoltaic cell string manufacturing system according to claim 1 or 4, characterized in that: The swinging piece device includes a first picking mechanism, a second picking mechanism and a conveying platform; the first picking mechanism is used to place the first photovoltaic cell on the conveying platform, and the second picking mechanism is used to place the second photovoltaic cell on the conveying platform; the first picking mechanism and the second picking mechanism act alternately in sequence so that the first photovoltaic cell and the second photovoltaic cell form the battery combination unit.

9. A photovoltaic module, characterized in that: The photovoltaic module includes a cell string, the cell string includes a plurality of photovoltaic cells and a plurality of interconnecting strips, the plurality of interconnecting strips are connected to a plurality of arranged photovoltaic cells to form the cell string, the side walls of the photovoltaic cells include a passivation layer, the interconnecting strips are at least partially in contact with the passivation layer, and the interconnecting strips are at least partially located on the upper side or the lower side of the passivation layer.

10. The photovoltaic module according to claim 9, characterized in that: Along the first direction, the plurality of photovoltaic cells include adjacent first photovoltaic cells and second photovoltaic cells, and the distance between the passivation layer of the side wall of the first photovoltaic cell and the passivation layer of the side wall of the second photovoltaic cell is D, satisfying: D is greater than 0 mm and less than or equal to 3 mm; and / or, the passivation layer is one of aluminum oxide, silicon nitride, silicon oxide, silicon oxynitride, silicon oxycarbide, and an organic passivation material.

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