Solar cell laser-induced production process and device

Abstract

The invention discloses a solar cell laser-induced production process and device, the device comprises a machine body, the machine body is provided with a transmission device, a laser-induced mechanism and a protection assembly, the laser-induced mechanism comprises a laser irradiation box, and the laser irradiation box is provided with a first sintering area, a second sintering area, a third sintering area and a fourth sintering area. The laser induction mechanism is provided with electrode modules matched with the first sintering area, the second sintering area, the third sintering area and the fourth sintering area. According to the solar cell laser-induced production process and device, the temperature of the cell can be effectively reduced, the thermal stress of the cell can be reduced, cracks and deformation in the cell can be prevented, the stability and reliability of a photovoltaic panel in long-term use can be enhanced, floccules can be prevented from appearing on the edge of the photovoltaic panel, and the service life of the photovoltaic panel can be prolonged. The light absorption efficiency of the photovoltaic panel is remarkably improved, the power generation capacity of the photovoltaic panel is enhanced, and the positive significance is achieved for promoting the development of the photovoltaic industry.

Description

Technical Field

[0001] The invention belongs to the technical field of laser induced sintering of solar cells, and in particular relates to a laser induced production process and device for solar cells. Background Art

[0002] With the increasing demand for clean energy, the photovoltaic industry has developed rapidly. In order to improve the photoelectric conversion efficiency of photovoltaic panels, laser induced sintering has become the mainstream production technology.

[0003] Laser induced sintering technology uses a high-energy laser beam to instantly melt the metal at the contact point between the grid and the silicon wafer to form a strong alloy junction, thereby significantly improving the contact performance of the electrode. This improvement not only reduces the contact resistance, but also enhances the current collection efficiency, which significantly improves the photoelectric conversion efficiency of solar cells. Better electrode contact can reduce the loss of current during transmission, and more light can be effectively converted into electrical energy. This is of great significance for reducing the cost of solar power generation and promoting the popularization of clean energy.

[0004] In actual production, there are some problems that cannot be ignored in the actual application of laser sintering technology. The high energy concentration of laser will cause the local temperature of the cell to be too high, resulting in severe thermal stress. This will cause cracks or deformation inside the silicon wafer, affecting the long-term stability and performance reliability of the photovoltaic panel. Especially at the edge of the photovoltaic panel, the strength of the cell becomes lower, and flocculent anomalies are more likely to occur, resulting in a rough surface, reducing light absorption efficiency, and directly affecting the power generation capacity of the photovoltaic panel. With the increasingly fierce market competition, the efficiency of photovoltaic panels has become one of the most important indicators to measure their quality and market competitiveness. How to effectively solve the defects brought by the laser sintering process and improve the production efficiency and performance stability of photovoltaic panels has become a key problem in the industry.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a solar cell laser induced production process and device.

[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] The purpose of the present invention is to provide a solar cell laser-induced production process and device, which can effectively reduce the temperature of the cell, reduce the thermal stress of the cell, prevent cracks and deformation inside the cell, and enhance the stability and reliability of the photovoltaic panel during long-term use. At the same time, it can also prevent the appearance of flocs at the edge of the photovoltaic panel, significantly improve the light absorption efficiency of the photovoltaic panel, and enhance the power generation capacity of the photovoltaic panel, which has positive significance for promoting the development of the photovoltaic industry.

[0008] In order to achieve the above-mentioned object, a specific embodiment of the present invention provides a solar cell laser induction production process and device, wherein the solar cell laser induction production process is used to melt the metal at the contact part between the grid and the silicon wafer on the cell, and comprises the following steps:

[0009] S1. Zoning: The laser induced production device is used for production, and the laser induced production device is divided into a first sintering zone, a second sintering zone, a third sintering zone and a fourth sintering zone, wherein the second sintering zone and the third sintering zone are adjacent to each other; the first sintering zone and the fourth sintering zone are respectively on both sides of the second sintering zone and the third sintering zone;

[0010] S2, refinement: the first sintering zone and the fourth sintering zone are respectively provided with a first edge zone and a second edge zone;

[0011] S3, making electrodes: brushing the battery cells according to the partitioning and refinement process to obtain battery cells with grids, and placing the battery cells with grids into a sintering furnace for sintering to obtain a preliminary solidified grid on the battery cells with grids;

[0012] S4, laser sintering: an electrode module corresponding to the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone is arranged on the laser induction mechanism, wherein the electrode module includes a first electrode, a second electrode and a third electrode;

[0013] The second electrode is aligned with the solid grid on the front of the second sintering zone and the third sintering zone, the first electrode and the fourth electrode are aligned with the solid grid on the front of the first sintering zone and the fourth sintering zone respectively, and the electrode module further includes a fourth electrode;

[0014] S5. Cooling: A protection module is installed on the laser induction mechanism. After the laser induction mechanism sinters the battery panel, the protection module sprays protective gas to cool the battery cell.

[0015] In one or more embodiments of the present invention, a first edge zone and a second edge zone are respectively arranged on the first sintering zone and the fourth sintering zone, and slurry is applied to the grids on the first edge zone and the second edge zone separately.

[0016] In one or more embodiments of the present invention, the number of grilles on the first edge region and the second edge region is 4-10.

[0017] In one or more embodiments of the present invention, the grid slurry thickness of the second sintering zone and the third sintering zone is 20-30 μm, and the grid slurry thickness of the first edge zone and the second edge zone is 12-18 μm.

[0018] In one or more embodiments of the present invention, the thickness of the slurry applied to the first edge area and the second edge area increases sequentially from the edge of the photovoltaic panel to the center of the photovoltaic panel.

[0019] In one or more embodiments of the present invention, when the laser beam on the laser induction mechanism moves, the protective gas follows the laser beam and moves simultaneously and is sprayed onto the previous laser sintering grid to cool the sintering grid.

[0020] In one or more embodiments of the present invention, a machine body is provided, on which a transmission device and a laser induction mechanism are installed, the laser induction mechanism includes a laser irradiation box, on which a first sintering zone, a second sintering zone, a third sintering zone and a fourth sintering zone are provided, and on which an electrode module matching the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone is installed, and the laser induced production device further includes:

[0021] A protection component is connected to the laser induction mechanism and is used for cooling the sintered battery cell.

[0022] In one or more embodiments of the present invention, the electrode module includes a first electrode, a second electrode and a third electrode, wherein the first electrode, the second electrode and the third electrode are mounted on the laser irradiation box, and the electrode module also includes a fourth electrode having a through hole.

[0023] In one or more embodiments of the present invention, the protection component includes a first control valve and a second control valve, the first control valve and the second control valve are connected, the first control valve is fixedly connected to a pressure tank, the first control valve has a first adjusting knob for controlling the second control valve, the second control valve is fixedly connected to an air compressor, the second control valve is fixedly connected to a second adjusting knob for controlling the flow of the air compressor, the second control valve is fixedly connected to an air pipe, the air pipe is fixedly connected to a laser irradiation box, the laser irradiation box is provided with an air slot, the air pipe is connected to the air slot, the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone are all provided with openings, and the air slots are respectively connected to the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone through the openings.

[0024] In one or more embodiments of the present invention, the protective component also includes an exhaust fan, an exhaust pipe is installed on the exhaust fan, and a connecting plate is fixedly connected to the end of the exhaust pipe away from the exhaust fan, the fourth electrode is installed on the connecting plate, and the connecting plate and the fourth electrode are connected.

[0025] Compared with the prior art, the solar cell laser-induced production process and device of the present invention can effectively reduce the temperature of the cell, reduce the thermal stress of the cell, prevent cracks and deformation inside the cell, and enhance the stability and reliability of the photovoltaic panel during long-term use. At the same time, it can also prevent the appearance of flocs on the edge of the photovoltaic panel, significantly improve the light absorption efficiency of the photovoltaic panel, and enhance the power generation capacity of the photovoltaic panel, which is of positive significance for promoting the development of the photovoltaic industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic structural diagram of a solar cell laser-induced production device according to an embodiment of the present invention;

[0028] Figure 2 for Figure 2 The structural diagram at A in the middle;

[0029] Figure 3 It is a structural schematic diagram of a laser induction mechanism of a solar cell laser induction production device in one embodiment of the present invention;

[0030] Figure 4 A cross-sectional view of a laser irradiation box of a solar cell laser induced production device according to an embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the internal quality of a solar cell produced without using a solar cell laser induction production process and device in one embodiment of the present invention;

[0032] Figure 6 The figure is a schematic diagram of the internal quality of a solar cell produced by a solar cell laser-induced production process and device in one embodiment of the present invention.

[0033] Description of main reference numerals:

[0034] 1. Machine body; 11. Transmission device; 2. Laser induction mechanism; 21. Laser irradiation box; 201. Wind slot; 221. Through hole; 211. First sintering zone; 2111. First electrode; 212. Second sintering zone; 2121. Second electrode; 213. Third sintering zone; 2131. Third electrode; 214. Fourth sintering zone; 215. Opening; 22. Fourth electrode; 3. Protection component; 31. First control valve; 311. First adjustment knob; 32. Second control valve; 321. Second adjustment knob; 33. Pressure tank; 34. Air compressor; 35. Exhaust fan; 36. Connecting plate. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] A solar cell laser induction production process in one embodiment of the present invention is used to melt the metal at the contact part between the grid and the silicon wafer on the solar cell, comprising the following steps:

[0037] S1. Zoning: The laser induced production device is used for production. The laser induced production device is divided into the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone. The second sintering zone and the third sintering zone are adjacent to each other; the first sintering zone and the fourth sintering zone are respectively on both sides of the second sintering zone and the third sintering zone;

[0038] S2, refinement: a first edge region and a second edge region are respectively provided on the first sintering region and the fourth sintering region;

[0039] S3, making electrodes: brushing the battery cells according to the partitioning and refinement process to obtain battery cells with grids, and placing the battery cells with grids into a sintering furnace for sintering to obtain a preliminary solidified grid on the battery cells with grids;

[0040] S4, laser sintering: an electrode module corresponding to the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone is arranged on the laser induction mechanism, and the electrode module includes a first electrode, a second electrode and a third electrode;

[0041] The second electrode is aligned with the solid grid on the front of the second sintering zone and the third sintering zone, the first electrode and the fourth electrode are aligned with the solid grid on the front of the first sintering zone and the fourth sintering zone respectively, and the electrode module further includes a fourth electrode;

[0042] S5. Cooling: A protection module is installed on the laser induction mechanism. After the laser induction mechanism sinters the battery panel, the protection module sprays protective gas to cool the battery cell.

[0043] Specifically, the second sintering zone and the third sintering zone are located in the middle part of the battery cell, and the first sintering zone and the fourth sintering zone are located at the edge part of the battery cell. In actual production, if the slurry thickness at the edge part of the battery cell is different from that in the middle part of the battery cell, flocs will appear in the battery cell after laser induced sintering. After zoned electrode production and laser sintering, the sintering quality of the battery cell can be improved.

[0044] Specifically, a reverse voltage is applied to the cell, and the laser induction mechanism emits a laser beam to scan the cell, and can penetrate the cell and irradiate the grid on the back of the solar panel, stimulating the cell to generate non-equilibrium carriers in the front grid line and back grid line areas, reducing the contact resistance of the initially formed back side. Since the solidified grid located in the first sintering zone and the fourth sintering zone is relatively thin, the number of non-equilibrium carriers is reduced, which can prevent the local temperature of the silicon wafer surface from being too high, and reduce the flocculent abnormality of the cell.

[0045] Furthermore, the first edge area and the second edge area are respectively provided on the first sintering area and the fourth sintering area, and the grids on the first edge area and the second edge area are slurried separately. The number of grids on the first edge area and the second edge area is 4-10. The slurry thickness of the grids on the second sintering area and the third sintering area is 20-30 μm, and the slurry thickness of the grids on the first edge area and the second edge area is 12-18 μm. The slurry thickness of the first edge area and the second edge area increases from the edge of the photovoltaic panel to the center of the photovoltaic panel.

[0046] Specifically, due to the physical characteristics of the PN junction on the solar cell, when the voltage increases to a sufficiently large value, the PN junction will be broken down, and the irradiated area will be turned on by laser irradiation. Because the thickness of the solid grid in the first edge area and the second edge area is reduced, it can prevent the solid grid from emitting too much heat, protect the silicon wafer, and prevent cracks or deformation inside the silicon wafer. The 4-10 solid grids in the first edge area and the second edge area can ensure the power generation efficiency of the solar cell within the unit area of ​​the solar cell. In this way, the solar cell can be protected and the power generation of the solar cell can be prevented from being affected by damage inside the silicon wafer.

[0047] Furthermore, when the laser beam on the laser induction mechanism moves, the protective gas follows the laser beam and moves simultaneously and is sprayed onto the previous laser sintering grid to cool the sintering grid.

[0048] Specifically, laser sintering technology uses a high-energy laser beam to instantly melt the metal at the contact point between the solid grid and the silicon wafer to form a strong alloy junction. A large amount of heat generated in this process accumulates in the silicon wafer. As the laser beam irradiation area increases, the thermal stress of the silicon wafer will increase. By spraying low-temperature cooling gas on the alloy junction formed after laser beam irradiation, the temperature near the melting point will drop rapidly, thereby accelerating the cooling speed, protecting the battery cell, and increasing the stability of the battery cell in long-term use.

[0049] like Figures 1 to 6 As shown, a solar cell laser induced production device in one embodiment of the present invention includes a body 1, on which a transmission device 11 and a laser induction mechanism 2 are installed, the laser induction mechanism 2 includes a laser irradiation box 21, on which a first sintering zone 211, a second sintering zone 212, a third sintering zone 213 and a fourth sintering zone 214 are provided, and an electrode module matching the first sintering zone 211, the second sintering zone 212, the third sintering zone 213 and the fourth sintering zone 214 is installed on the laser induction mechanism 2, the electrode module includes a first electrode 2111, a second electrode 2121 and a third electrode 2131, which are installed on the laser irradiation box 21, and the electrode module also includes a fourth electrode 22, on which a through hole 221 is opened.

[0050] Specifically, the first electrode 2111, the second electrode 2121 and the third electrode 2131 divide the laser irradiation box 21 into four sintering zones, wherein the first electrode 2111 corresponds to the first sintering zone 211 at the edge of the laser irradiation box 21, the second sintering zone 212 is between the first electrode 2111 and the second electrode 2121, the third sintering zone 213 is between the second electrode 2121 and the third electrode 2131, and the fourth sintering zone 214 is the fourth sintering zone 214 at the other end edge of the laser irradiation box 21.

[0051] Before laser induced sintering of the cell, the cell is slurried to make a grid according to the first sintering area 211, the second sintering area 212, the third sintering area 213 and the fourth sintering area 214 on the laser irradiation box 21, and 4-10 grid lines are separately coated at the edge of the cell, and the slurry thickness of these 4-10 grid lines is 12-18μm. After the slurry is applied to the cell, it is first placed in a sintering furnace for sintering, so that a preliminary solidified grid is obtained on the cell with the grid.

[0052] The battery cell with the solidified grid is placed on the fourth electrode 22, and then the laser irradiation box 21 is operated. The first electrode 2111, the second electrode 2121, and the third electrode 2131 on the laser irradiation box 21 are respectively connected to the fourth electrode 22. After being irradiated by the laser beam, the solidified grid on the battery cell is heated to melt it and form a strong alloy junction.

[0053] Specifically, when the solidified grids on the battery cell melt, the thickness of the 4-10 solidified grids located at the edge of the battery cell is relatively small, the surface temperature of the silicon wafer will also decrease, and the cooling speed will also become faster, which can reduce the thermal stress at the edge of the battery cell to a certain extent and reduce the occurrence of cracks or deformation inside the silicon wafer.

[0054] In addition, the power of the first electrode 2111, the second electrode 2121 and the third electrode 2131 arranged on the laser irradiation box 21 can be controlled individually, and adjusted according to the thickness of the grid line on the battery cell to reduce the thermal stress of the battery cell. After the power of the first electrode 2111 and the third electrode 2131 is reduced, the thermal stress at the edge of the battery cell can be reduced to prevent internal cracks from occurring in the area of ​​the battery cell with low strength.

[0055] At the same time, the through hole 221 on the fourth electrode 22 can accelerate the discharge of heat from the battery cell and accelerate the elimination of thermal stress inside the battery cell.

[0056] Preferably, the sintering temperature of the first sintering zone 211 and the fourth sintering zone 214 is 420-480°C, and the sintering temperature of the second sintering zone 212 and the third sintering zone 213 is 550-600°C. In this way, the energy consumption can be reduced while lowering the temperature of the first sintering zone 211 and the fourth sintering zone 214. Although the sintering temperature of the second sintering zone 212 and the third sintering zone 213 is 550-600°C, which is lower than the mainstream sintering temperature of 650-700°C in the market, because the battery cell is divided into four areas, the number of grids in the second sintering zone 212 and the third sintering zone 213 is reduced, which will not affect the sintering quality, but also reduce energy consumption and save production costs.

[0057] In addition, the slurry currently used on battery cells is mostly silver paste, which has a relatively high cost. By reducing the thickness of the grid lines at the edge of the battery cells, the use of slurry can be saved, production costs can be greatly reduced, and profits can be increased.

[0058] In order to better protect the battery cells, the laser induced production device further includes a protection component 3, which is connected to the laser induced mechanism 2 and is used to cool the sintered battery cells.

[0059] The protection component 3 includes a first control valve 31 and a second control valve 32, the first control valve 31 and the second control valve 32 are connected, the first control valve 31 is fixedly connected to a pressure tank 33, the first control valve 31 has a first adjustment knob 311 for controlling the second control valve 32, the second control valve 32 is fixedly connected to an air compressor 34, and the second control valve 32 is fixedly connected to a second adjustment knob 321 for controlling the flow of the air compressor 34. The second control valve 32 is fixedly connected to an air supply pipe, which is fixedly connected to the laser irradiation box 21. An air slot 201 is provided on the laser irradiation box 21, and the air pipe is connected to the air slot 201. A plurality of openings 215 are also provided on the laser irradiation box 21, and the openings 215 are located in the first sintering zone 211, the second sintering zone 212, the third sintering zone 213 and the fourth sintering zone 214. The air slot 201 is connected to the first sintering zone 211, the second sintering zone 212, the third sintering zone 213 and the fourth sintering zone 214 respectively through the openings 215.

[0060] Specifically, the air compressor 34 is filled with liquid nitrogen. After the battery cells are sintered by laser induction, the pressure tank 33 is started. After passing through the first control valve 31, the liquid nitrogen in the pressure tank 33 is converted into low-temperature gas, which is passed into the wind slot 201 and sprayed out from multiple openings 215 to quickly cool the battery cells, reduce the heat of the battery cells themselves, and eliminate the thermal stress inside the battery cells.

[0061] It is worth noting that, since there are multiple openings 215 on the laser irradiation box 21, the speed of the low-temperature gas in the wind slot 201 when it is ejected is affected by the air pressure, and the flow rate is slow. In order to enable the low-temperature gas to be ejected quickly, the liquid nitrogen on the pressure tank 33 first enters the gas storage part in the second control valve 32 through the conversion of the pressure tank 33, and then the air compressor 34 is started to pressurize the second control valve 32. When the pressure value of the second control valve 32 reaches the set value, the valve of the gas storage part on the second control valve 32 will open quickly. At this time, the gas pressurized by the air compressor 34 on the gas storage part of the second control valve 32 and the cooling gas stored in the second control valve 32 will be ejected into the wind slot 201, and finally sprayed on the battery panel from the opening 215. Since the gas stored in the second control valve 32 is firstly low-temperature gas, these low-temperature gases can quickly cool down the battery cells.

[0062] Furthermore, the protection component 3 also includes an exhaust fan 35, on which an exhaust pipe is installed, and one end of the exhaust pipe away from the exhaust fan 35 is fixedly connected to a connecting plate 36, the fourth electrode 22 is installed on the connecting plate 36, and the connecting plate 36 and the fourth electrode 22 are connected.

[0063] Specifically, the exhaust fan 35 works continuously during the laser induced sintering of the cell, and can absorb the heat on the fourth electrode 22, which helps to reduce the temperature of the cell on the fourth electrode 22 to a certain extent, and helps to improve the quality of the cell. At the same time, since toxic and harmful gases are generated after the cell is sintered, the fourth electrode 22 can also extract these toxic and harmful gases.

[0064] When in use, the battery cells are brushed with slurry to form a grid according to the partitions on the laser irradiation box 21, and then the battery cells that have obtained a solid grid after sintering are placed accordingly on the fourth electrode 22. After the laser induction mechanism 2 is started, the laser beam is irradiated on the battery cells on the fourth electrode 22, so that the solid grid on the battery cells and the metal part in contact with the silicon wafer are melted to form a strong alloy bond.

[0065] By adjusting the thickness of the grid lines at the edge of the cell and the parameters of the electrode assembly, the sintering temperature of the cell is reduced, and low-temperature gas is input into the laser irradiation box 21 through the protective component 3 to quickly cool down the sintered cell, thereby reducing the thermal stress of the cell and avoiding the occurrence of excessively high local temperatures on the cell surface due to the high energy of the laser beam, which leads to the appearance of flocs inside the cell.

[0066] Compared with the prior art, the solar cell laser-induced production process and device of the present invention can effectively reduce the temperature of the cell, reduce the thermal stress of the cell, prevent cracks and deformation inside the cell, and enhance the stability and reliability of the photovoltaic panel during long-term use. At the same time, it can also prevent the appearance of flocs on the edge of the photovoltaic panel, significantly improve the light absorption efficiency of the photovoltaic panel, and enhance the power generation capacity of the photovoltaic panel, which is of positive significance for promoting the development of the photovoltaic industry.

[0067] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0068] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A solar cell laser induction production process, wherein the laser induction production process uses a laser induction device to melt the metal at the contact part between the grid and the silicon wafer on the solar cell, characterized in that: The following steps are involved: S1. Zoning: The laser induced production device is used for production, and the laser induced production device is divided into a first sintering zone, a second sintering zone, a third sintering zone and a fourth sintering zone, wherein the second sintering zone and the third sintering zone are adjacent to each other; the first sintering zone and the fourth sintering zone are respectively on both sides of the second sintering zone and the third sintering zone; S2, refinement: the first sintering zone and the fourth sintering zone are respectively provided with a first edge zone and a second edge zone; S3, making electrodes: brushing the battery cells according to the partitioning and refinement process to obtain battery cells with grids, and placing the battery cells with grids into a sintering furnace for sintering to obtain a preliminary solidified grid on the battery cells with grids; S4, laser sintering: an electrode module corresponding to the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone is arranged on the laser induction mechanism, wherein the electrode module includes a first electrode, a second electrode and a third electrode; The second electrode is aligned with the solid grid on the front of the second sintering zone and the third sintering zone, the first electrode and the fourth electrode are aligned with the solid grid on the front of the first sintering zone and the fourth sintering zone respectively, and the electrode module further includes a fourth electrode; S5. Cooling: A protection module is installed on the laser induction mechanism. After the laser induction mechanism sinters the battery panel, the protection module sprays protective gas to cool the battery cell.

2. A solar cell laser induction production process according to claim 1, characterized in that: A first edge area and a second edge area are respectively arranged on the first sintering area and the fourth sintering area, and slurry is applied to the grids on the first edge area and the second edge area separately.

3. A solar cell laser induction production process according to claim 2, characterized in that: The number of grids on the first edge area and the second edge area is 4-10.

4. A solar cell laser induction production process according to claim 3, characterized in that: The thickness of the grid slurry brushing on the second sintering zone and the third sintering zone is 20-30 μm, and the thickness of the grid slurry brushing on the first edge zone and the second edge zone is 12-18 μm.

5. The solar cell laser induction production process according to claim 4, characterized in that: The thickness of the slurry applied to the first edge area and the second edge area increases sequentially from the edge of the photovoltaic panel to the center of the photovoltaic panel.

6. The solar cell laser induced production process according to claim 1, characterized in that: When the laser beam on the laser induction mechanism moves, the protective gas moves along with the laser beam and is sprayed onto the previous laser sintering grid at the same time to cool the sintering grid.

7. A solar cell laser induction production device, comprising a machine body, on which a transmission device and a laser induction mechanism are installed, characterized in that: The laser induction mechanism comprises a laser irradiation box, on which a first sintering zone, a second sintering zone, a third sintering zone and a fourth sintering zone are arranged, and an electrode module matching the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone is installed on the laser induction mechanism, and the laser induction production device further comprises: A protection component is connected to the laser induction mechanism and is used for cooling the sintered battery cell.

8. The solar cell laser induced production device according to claim 7, characterized in that: The electrode module comprises a first electrode, a second electrode and a third electrode, wherein the first electrode, the second electrode and the third electrode are mounted on a laser irradiation box, and the electrode module further comprises a fourth electrode, wherein a through hole is formed on the fourth electrode.

9. The solar cell laser induced production device according to claim 8, characterized in that: The protection component includes a first control valve and a second control valve, the first control valve and the second control valve are connected, the first control valve is fixedly connected to a pressure tank, the first control valve has a first adjusting knob for controlling the second control valve, the second control valve is fixedly connected to an air compressor, the second control valve is fixedly connected to a second adjusting knob for controlling the flow of the air compressor, the second control valve is fixedly connected to an air pipe, the air pipe is fixedly connected to a laser irradiation box, the laser irradiation box is provided with an air slot, the air pipe is connected to the air slot, the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone are all provided with openings, and the air slots are respectively connected to the first sintering zone, the second sintering zone, the third sintering zone and the fourth sintering zone through the openings.

10. The solar cell laser induced production device according to claim 9, characterized in that: The protection component also includes an exhaust fan, an exhaust pipe is installed on the exhaust fan, and one end of the exhaust pipe away from the exhaust fan is fixedly connected to a connecting plate, the fourth electrode is installed on the connecting plate, and the connecting plate and the fourth electrode are connected.

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