Solar cell module processing method based on battery pack string
By adopting precise process control and advanced conductive materials in the processing method of solar cell modules, the electrode point shedding and warping problems caused by high-temperature welding are solved, and the production yield and the reliability of the components are improved.
Patent Information
- Application Number
- CN202510085683.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-04-18
AI Technical Summary
During high-temperature welding, the high-temperature environment may cause the electrode points of the solar cell to fall off, resulting in poor welding problems. At the same time, due to thermal stress after welding cooling, the battery cell may warp, affecting the production yield and long-term stability of the components.
Using a solar cell module processing method based on battery strings, the use of advanced conductive materials such as tin bismuth alloy paste, polymer conductive paste and silver paste is used through precise process control, including the arrangement of conductive materials, the laying of conductive tapes and the arrangement of power generation units, and pre-adhesives are formed through baking and heating to ensure the reliability of the components.
It effectively avoids the impact of high-temperature welding on electrode points, improves production yield, ensures the reliability and long-term stability of components, and reduces the risks of desoldering and hidden cracking.
Smart Images
Figure CN119855280A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of solar cells, and in particular to a method for processing a solar cell assembly based on a battery string. Background Art
[0002] As the global energy crisis intensifies and environmental pollution becomes increasingly serious, the development and utilization of solar energy as a clean and renewable energy source has attracted more and more attention from the world. As the core component of the solar power system, solar panels are responsible for the important task of efficiently converting solar energy into electrical energy. Their performance and life are directly related to the efficiency and reliability of the entire system.
[0003] In the traditional production process of ribbon-type solar cell modules, the welding of the ribbon usually needs to be performed at a relatively high temperature. However, during the high-temperature welding process, the high temperature environment may cause the electrode points on the battery to fall off, resulting in poor welding. In addition, after the welding cools down, the battery cell may warp due to the effect of thermal stress, which seriously affects the production yield and the long-term stability of the module. At the same time, the existing conductive ribbons are generally directly welded and then directly carried out for subsequent work, which may cause detachment during subsequent processing.
[0004] In the production process of using conductive backplane as interconnect material, the pre-patterned conductive material is adhered to the adhesive film. During this process, the material may shrink to varying degrees before and after processing and under different room temperature conditions. This shrinkage may cause the position of the pattern to shift, which in turn affects the precise alignment of the cell electrode points and the conductive pattern, increasing the defect rate in the production process. Summary of the invention
[0005] In view of the shortcomings of the prior art, the present invention provides a solar cell assembly processing method based on a battery string, which solves the problem that during high-temperature welding, the high temperature environment may cause the electrode points on the battery to fall off, thereby causing poor welding. In addition, after the welding is cooled, due to the effect of thermal stress, the battery cell may warp, which seriously affects the production yield and the long-term stability of the assembly. At the same time, the existing conductive tape is generally directly welded and then directly carried out subsequent work, which may cause the problem of detachment during subsequent processing.
[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a solar cell assembly processing method based on a battery string, the processing method comprising the following steps: Step 1: Lay the backplane and back packaging; Step 2: Arrange the conductive material on the conductive tape by dispensing and printing; Step 3: Use a robot to lay the conductive tape on the sheet arrangement device in sequence; Step 4: Use a robot to lay the power generation units on the conductive tape one by one; Step 5: The conductive tape and the power generation unit laminated material are baked and heated, and the conductive material is partially solidified after being heated, and a pre-bonding is formed between the power generation unit and the conductive tape to obtain a power generation string; Step 6: Use the robot to lay the power generation string to the designated position of the back package; Step 7: After laying the front packaging material and the front board material, lamination is performed.
[0007] Preferably, the back panel material can be glass or a common photovoltaic back panel, and the back packaging can be but is not limited to EVA, EPE, POE, PVB, or an inorganic silica gel material.
[0008] Preferably, the conductive material can be, but is not limited to, tin-bismuth alloy paste, polymer conductive paste, or silver paste.
[0009] Preferably, the conductive tape width can be 0.5-20 mm.
[0010] Preferably, the conductive tape material can be but is not limited to copper, aluminum, silver, gold, nickel, tungsten or alloys of two or more thereof.
[0011] Preferably, a plurality of positive and negative electrode points are provided on the power generation unit, and an insulating structure layer is provided on the positive and negative grid lines.
[0012] Preferably, the conductive belt and the power generation unit can be heated by infrared or heating lamp.
[0013] Preferably, the heating temperature of the stack of the conductive tape and the power generation unit does not exceed 150°C.
[0014] The present invention discloses a method for processing a solar cell assembly based on a battery string, which has the following beneficial effects: This solar cell module processing method based on battery strings uses precise process control, including the arrangement of conductive materials, the laying of conductive tapes, and the arrangement of power generation units, all of which are strictly designed and monitored to ensure that each step reaches the best state. Advanced conductive materials such as tin-bismuth alloy paste, polymer conductive paste, and silver paste are used. These materials not only have excellent conductive properties, but also can maintain stability at high temperatures, thereby improving the photoelectric conversion efficiency of the module. By baking and heating the conductive tape and the power generation unit laminated materials, the conductive material is partially cured after heating to form a pre-bond, which not only speeds up the production speed but also ensures the reliability of the module.
[0015] In this solar cell module processing method based on battery strings, all processes before lamination and working conditions are carried out at low temperatures, which can effectively avoid the impact of high-temperature welding on the electrode points of the power generation unit, solve the problem of electrode point falling off, and greatly improve the production yield; the conductive tape is placed in real time, and the ultra-high precision mechanical laying equipment can accurately attach the conductive tape to the specified position one by one to ensure processing accuracy; the product as a whole has a two-dimensional packaging structure, and through the low-temperature packaging process, there is no thermal stress between the conductive tape and the battery cell of the power generation unit, which further reduces the risk of desoldering and hidden cracks, and the product reliability is better.
[0016] The solar cell module processing method based on battery strings can adopt a variety of packaging materials, such as EVA, EPE, POE, which not only have good sealing properties, but also can effectively resist the erosion of external factors such as ultraviolet rays, moisture and mechanical stress, thereby extending the service life of the module. The insulating structural layer on the power generation unit can prevent the occurrence of current short circuit and leakage, further improving the safety and reliability of the module. The method provides a variety of material options, such as the backplane material can be glass or ordinary photovoltaic backplane, and the conductive tape can be copper, aluminum, silver, gold, nickel, tungsten and other metals or their alloy materials, which allows producers to flexibly adjust according to actual needs. Due to the flexibility of material selection and process control, this method is suitable for the production of different types of solar cell modules, such as rooftop solar energy systems, solar power stations, etc., to meet different application scenarios and needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 This is a schematic diagram of the processing flow of the present invention; Figure 2 This is the second schematic diagram of the processing flow of the present invention. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are 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 are within the scope of protection of the present invention.
[0020] The embodiment of the present application provides a solar cell assembly processing method based on a battery string, which solves the problem that during high-temperature welding, the high temperature environment may cause the electrode points on the battery to fall off, thereby causing poor welding. In addition, after the welding is cooled, due to the effect of thermal stress, the battery cell may warp, which seriously affects the production yield and the long-term stability of the assembly. At the same time, the existing conductive tape is generally directly welded and then directly carried out in subsequent work, which may cause the problem of detachment during subsequent processing.
[0021] This method uses precise process control, including the layout of conductive materials, the laying of conductive tapes, and the arrangement of power generation units, which are strictly designed and monitored to ensure that each step reaches the best state. Advanced conductive materials such as tin-bismuth alloy paste, polymer conductive paste and silver paste are used. These materials not only have excellent conductive properties, but also can maintain stability at high temperatures, thereby improving the photoelectric conversion efficiency of the component. By baking and heating the conductive tape and the power generation unit stacking materials, the conductive material is partially cured after heating to form a pre-bonding, which not only speeds up the production speed but also ensures the reliability of the component.
[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0023] The embodiment of the invention discloses a method for processing a solar cell assembly based on a battery string.
[0024] According to the attached Figure 1-2 As shown, the processing method comprises the following steps: Step 1: Lay the backplane and back packaging; Step 2: Arrange the conductive material on the conductive tape by dispensing and printing; Step 3: Use a robot to lay the conductive tape on the sheet arrangement device in sequence; Step 4: Use a robot to lay the power generation units on the conductive tape one by one; Step 5: The conductive tape and the power generation unit laminated material are baked and heated, and the conductive material is partially solidified after being heated, and a pre-bonding is formed between the power generation unit and the conductive tape to obtain a power generation string; Step 6: Use the robot to lay the power generation string to the designated position of the back package; Step 7: After laying the front packaging material and the front board material, lamination is performed.
[0025] Furthermore, the back panel material can be glass or a common photovoltaic back panel, and the back packaging can be but is not limited to EVA, EPE, POE, PVB, or inorganic silica gel material.
[0026] Specifically disclosed, the conductive material can be, but is not limited to, tin-bismuth alloy paste, polymer conductive paste, and silver paste.
[0027] Furthermore, the width of the conductive tape can be 0.5-20 mm.
[0028] Furthermore, the conductive tape material can be but is not limited to copper, aluminum, silver, gold, nickel, tungsten or alloys of two or more thereof.
[0029] It is particularly disclosed that a plurality of positive and negative electrode points are arranged on the power generation unit, and an insulating structure layer is arranged on the positive and negative grid lines.
[0030] Furthermore, the conductive strip and the power generation unit can be heated by infrared or a heating lamp.
[0031] It is particularly disclosed that the heating temperature of the stacking of the conductive tape and the power generation unit does not exceed 150°C.
[0032] This method uses precise process control, including the layout of conductive materials, the laying of conductive tapes, and the arrangement of power generation units, which are strictly designed and monitored to ensure that each step reaches the best state. Advanced conductive materials such as tin-bismuth alloy paste, polymer conductive paste and silver paste are used. These materials not only have excellent conductive properties, but also can maintain stability at high temperatures, thereby improving the photoelectric conversion efficiency of the component. By baking and heating the conductive tape and the power generation unit stacking materials, the conductive material is partially cured after heating to form a pre-bonding, which not only speeds up the production speed but also ensures the reliability of the component.
[0033] All processes before lamination are carried out under low temperature working conditions, which can effectively avoid the impact of high-temperature welding on the electrode points of the power generation unit, solve the problem of electrode point falling off, and greatly improve the production yield; the conductive tape is placed in real time, and the ultra-high precision mechanical laying equipment can accurately attach the conductive tape to the specified position one by one to ensure processing accuracy; the overall product has a two-dimensional packaging structure. At the same time, through the low-temperature packaging process, there is no thermal stress between the conductive tape and the battery cell of the power generation unit, which further reduces the risk of desoldering and hidden cracks, and the product reliability is better.
[0034] A variety of packaging materials can be used, such as EVA, EPE, and POE. These materials not only have good sealing properties, but also can effectively resist the erosion of external factors such as ultraviolet rays, moisture, and mechanical stress, thereby extending the service life of the component. The insulating structural layer on the power generation unit can prevent the occurrence of current short circuits and leakage phenomena, further improving the safety and reliability of the component. The method provides a variety of material options, such as the backplane material can be glass or ordinary photovoltaic backplanes, and the conductive tape can be copper, aluminum, silver, gold, nickel, tungsten and other metals or their alloy materials, which allows producers to flexibly adjust according to actual needs. Due to the flexibility of material selection and process control, this method is suitable for the production of different types of solar cell modules, such as rooftop solar systems, solar power stations, etc., to meet different application scenarios and needs.
[0035] Example 1 Step 1: Lay the back packaging material on the backboard material. The backboard material can be glass or ordinary photovoltaic backboard. The back packaging can be but not limited to EVA, EPE, POE, PVB, and inorganic silica gel material.
[0036] Step 2: Place the conductive material on the conductive tape by dispensing or printing. The conductive material can be, but is not limited to, tin-bismuth alloy paste, polymer conductive paste, or silver paste. The width of the conductive tape can be 0.5-20 mm; the conductive tape material can be, but is not limited to, copper, aluminum, silver, gold, nickel, tungsten, or two or more alloys thereof.
[0037] Step 3: Use a robot to lay the conductive tape on the sheet arrangement device in sequence; Step 4: Use a manipulator to lay the power generation unit on the conductive belt in sequence; the power generation unit is provided with a plurality of positive and negative electrode points, and an insulating structure layer is provided on the positive and negative grid lines; Step 5: Use infrared or baking lamp to bake and heat the conductive tape and the power generation unit laminated material. The conductive material is partially solidified after being heated, and the power generation unit and the conductive tape are pre-bonded to obtain a power generation string. The heating temperature does not exceed 150°C; Step 6: Use the robot to lay the power generation string to the designated position of the back package; Step 7: After laying the front packaging material and the front board material, lamination is performed.
[0038] Example 2 Step 1: Lay the composite material of the back sheet and the back packaging. The back sheet material can be glass or ordinary photovoltaic back sheet, and the back packaging can be but not limited to EVA, EPE, POE, PVB, and inorganic silica gel material. The two are compounded together.
[0039] Step 2: Place the conductive material on the conductive tape by dispensing or printing. The conductive material can be, but is not limited to, tin-bismuth alloy paste, polymer conductive paste, or silver paste. The width of the conductive tape can be 0.5-20 mm; the conductive tape material can be, but is not limited to, copper, aluminum, silver, gold, nickel, tungsten, or two or more alloys thereof.
[0040] Step 3: Use a robot to lay the conductive tape on the sheet arrangement device in sequence; Step 4: Use a manipulator to lay the power generation unit on the conductive belt in sequence; the power generation unit is provided with a plurality of positive and negative electrode points, and an insulating structure layer is provided on the positive and negative grid lines; Step 5: Use infrared or baking lamp to bake and heat the laminated materials of the conductive tape and the power generation unit. The conductive material is partially cured after being heated, and a pre-bonding is formed between the power generation unit and the conductive tape to obtain a power generation string. The heating temperature does not exceed 150°C; Step 6: Use the robot to lay the power generation string to the designated position of the back package; Step 7: After laying the front packaging material and the front board material, lamination is performed.
[0041] This method uses precise process control, including the layout of conductive materials, the laying of conductive tapes, and the arrangement of power generation units, which are strictly designed and monitored to ensure that each step reaches the best state. Advanced conductive materials such as tin-bismuth alloy paste, polymer conductive paste and silver paste are used. These materials not only have excellent conductive properties, but also can maintain stability at high temperatures, thereby improving the photoelectric conversion efficiency of the component. By baking and heating the conductive tape and the power generation unit stacking materials, the conductive material is partially cured after heating to form a pre-bonding, which not only speeds up the production speed but also ensures the reliability of the component.
[0042] All processes before lamination are carried out under low temperature working conditions, which can effectively avoid the impact of high-temperature welding on the electrode points of the power generation unit, solve the problem of electrode point falling off, and greatly improve the production yield; the conductive tape is placed in real time, and the ultra-high precision mechanical laying equipment can accurately attach the conductive tape to the specified position one by one to ensure processing accuracy; the overall product has a two-dimensional packaging structure. At the same time, through the low-temperature packaging process, there is no thermal stress between the conductive tape and the battery cell of the power generation unit, which further reduces the risk of desoldering and hidden cracks, and the product reliability is better.
[0043] A variety of packaging materials can be used, such as EVA, EPE, and POE. These materials not only have good sealing properties, but also can effectively resist the erosion of external factors such as ultraviolet rays, moisture, and mechanical stress, thereby extending the service life of the component. The insulating structural layer on the power generation unit can prevent the occurrence of current short circuits and leakage phenomena, further improving the safety and reliability of the component. The method provides a variety of material options, such as the backplane material can be glass or ordinary photovoltaic backplanes, and the conductive tape can be copper, aluminum, silver, gold, nickel, tungsten and other metals or their alloy materials, which allows producers to flexibly adjust according to actual needs. Due to the flexibility of material selection and process control, this method is suitable for the production of different types of solar cell modules, such as rooftop solar systems, solar power stations, etc., to meet different application scenarios and needs.
[0044] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A method for processing a solar cell assembly based on a battery string, characterized in that: The processing method comprises the following steps: Step 1: Lay the backplane and back packaging; Step 2: Arrange the conductive material on the conductive tape by dispensing and printing; Step 3: Use a robot to lay the conductive tape on the sheet arrangement device in sequence; Step 4: Use a robot to lay the power generation units on the conductive tape one by one; Step 5: The conductive tape and the power generation unit laminated material are baked and heated, and the conductive material is partially solidified after being heated, and a pre-bonding is formed between the power generation unit and the conductive tape to obtain a power generation string; Step 6: Use the robot to lay the power generation string to the designated position of the back package; Step 7: After laying the front packaging material and the front board material, lamination is performed.
2. A method for processing a solar cell assembly based on a battery string according to claim 1, characterized in that: The back panel material can be glass or a common photovoltaic back panel, and the back packaging can be but is not limited to EVA, EPE, POE, PVB, or an inorganic silica gel material.
3. A method for processing a solar cell assembly based on a battery string according to claim 1, characterized in that: The conductive material can be, but is not limited to, tin-bismuth alloy paste, polymer conductive paste, or silver paste.
4. A method for processing a solar cell assembly based on a battery string according to claim 1, characterized in that: The conductive tape width can be 0.5-20 mm.
5. A method for processing a solar cell assembly based on a battery string according to claim 1, characterized in that: The conductive tape may be made of, but not limited to, copper, aluminum, silver, gold, nickel, tungsten or alloys of two or more thereof.
6. A method for processing a solar cell assembly based on a battery string according to claim 1, characterized in that: The power generation unit is provided with a plurality of positive and negative electrode points, and an insulating structure layer is provided on the positive and negative grid lines.
7. A method for processing a solar cell assembly based on a battery string according to claim 1, characterized in that: The conductive belt and the power generation unit can be heated by infrared or heating lamp.
8. A method for processing a solar cell assembly based on a battery string according to claim 1, characterized in that: The heating temperature of the stack of the conductive tape and the power generation unit does not exceed 150°C.