Method for processing solar cell module with confluence of cells
By processing solar cell modules under low temperature conditions and using baking and heating to form pre-adhesive connection of bus conducting tapes and power generation units, the electrode point shedding and warping caused by high-temperature welding is solved, and the mechanical strength and service life of the module are improved, while reducing manufacturing costs and production difficulties.
Patent Information
- Application Number
- CN202510085410.9
- 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, the battery cells may warp due to thermal stress after welding, which will affect the production yield and component stability.
The solar cell module processing method adopts a cell bushing method, by performing all processes under low temperature conditions, a conductive material is arranged on the battery cell of the power generation unit using a robot, and a pre-adhesive connection of the bushing conductive tape and the power generation unit are formed by baking and heating.
Ensures the firmness and stability of the connection, improves the mechanical strength and service life of the components, reduces the failure rate due to poor connection, and reduces the manufacturing cost and production difficulty.
Smart Images
Figure CN119855279A_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 with cell slices converging. 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 higher temperature. However, during high-temperature welding, 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, during the connection process of solar cells, more connectors and wires are required, which increases the cost on the one hand and increases the difficulty of processing on the other.
[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 method for processing a solar cell assembly with a cell confluence, which solves the problem that during high-temperature welding, the high temperature environment may cause the electrode points on the cell to fall off, thereby causing poor welding. In addition, after the welding is cooled, the cell may warp due to the effect of thermal stress, which seriously affects the production yield and the long-term stability of the assembly. At the same time, during the connection process of the solar cell, a large number of connectors and wires are required, which increases the cost on the one hand and increases the difficulty of processing on the other hand.
[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for processing a solar cell assembly with battery cell convergence, the processing method comprising the following steps: Step 1: Lay the front packaging material on the front plate material; Step 2: A plurality of positive and negative electrode points are provided on the power generation unit, and a conductive material is arranged on the battery sheet of the power generation unit; Step 3: Use a robot to lay the power generation units on the string device one by one; Step 4: Use a robot to lay the conductive tape on the electrode points of the power generation unit in sequence, so that the conductive material is between the power generation unit and the conductive tape to form an effective contact; Step 5: The battery string stack is baked and heated, and the conductive material is partially cured after being heated, so that the power generation unit and the conductive tape are pre-bonded; Step 6: Use a mechanical device to lay the battery string with the power generation units in series to the designated position of the front package; Step 7: Lay the busbar conductive tape printed with electrical glue on the string; Step 8: The overlapping positions of the busbar conductive tape and the conductive tape are heated and baked, and the conductive material is partially cured after being heated to form a pre-bond; Step 9: After laying the back packaging material and the backboard material, lamination is performed.
[0007] Preferably, the front panel material can be glass or a transparent front panel, and the front packaging material can be but is not limited to EVA, EPE, POE, PVB, or an inorganic silica gel material.
[0008] Preferably, the conductive material is arranged on the battery cell of the power generation unit by dispensing or printing.
[0009] Preferably, the conductive material can be, but is not limited to, tin-bismuth alloy paste, polymer conductive paste, or silver paste.
[0010] Preferably, the width of the conductive tape can be 0.5-20 mm; the conductive tape material can be but not limited to single substances such as copper, aluminum, silver, gold, nickel, tungsten or alloys of two or more thereof.
[0011] Preferably, the battery string stack is baked and heated by infrared or baking lamp.
[0012] Preferably, the heating temperature of the battery string stack does not exceed 150°C.
[0013] Preferably, the overlapping positions of the busbar conductive strips and the conductive strips are heated by infrared or heating lamps, and the conductive material is partially cured after being heated.
[0014] Preferably, an insulating structure layer is provided on the positive and negative grid lines of the power generation unit.
[0015] The present invention discloses a method for processing a solar cell assembly with battery cell convergence, which has the following beneficial effects: 1. The processing method of the solar cell module with the cell converging, the connection between the converging conductive tape and the power generation unit is pre-bonded by baking and heating, which ensures the firmness and stability of the connection. This connection method not only improves the mechanical strength of the module, but also reduces the failure rate caused by poor connection, thereby extending the service life of the solar cell module. The use of the converging conductive tape simplifies the structure of the solar cell module and reduces the number of connectors and wires required in the traditional connection method. This not only reduces the manufacturing cost of the module, but also improves the assembly efficiency and production automation of the module.
[0016] 2. The processing method of the solar cell assembly with cell convergence is that all the processes before lamination and working conditions are carried out at low temperature, which can effectively avoid the influence 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 carried out in a real-time patch manner, and the ultra-high-precision mechanical laying equipment can accurately attach the conductive tape to the specified position one by one to ensure the processing accuracy; the overall product has a two-dimensional packaging structure, and through the low-temperature packaging process, there is no thermal stress between the conductive tape and the cell of the power generation unit, which further reduces the risk of desoldering and hidden cracks, and the product reliability is better.
[0017] 3. The processing method of the solar cell module with the cell converging, the converging conductive tape can be customized according to the design requirements of the solar cell module, including the width, length, material and printed discharge glue pattern of the conductive tape. This flexibility enables the converging conductive tape to adapt to solar cell modules of different sizes and types and meet diverse market needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] 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.
[0019] Figure 1 This is a processing flow chart of Example 1 of the present invention; Figure 2 This is a processing flow chart of Example 2 of the present invention; Figure 3 This is a processing flow chart of Example 3 of the present invention. DETAILED DESCRIPTION
[0020] 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.
[0021] The embodiment of the present application provides a method for processing a solar cell module with a cell confluence, which solves the problem that in the production process using a conductive backplane as an interconnection material, the conductive material of the prefabricated pattern 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, thereby affecting the precise alignment of the cell electrode point and the conductive pattern, and increasing the defective rate in the production process. The connection between the converging conductive tape and the power generation unit is pre-bonded by baking and heating, ensuring the firmness and stability of the connection. This connection method not only improves the mechanical strength of the component, but also reduces the failure rate caused by poor connection, thereby extending the service life of the solar cell module. The use of the converging conductive tape simplifies the structure of the solar cell module and reduces the number of connectors and wires required in the traditional connection method. This not only reduces the manufacturing cost of the component, but also improves the assembly efficiency and production automation 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 with cell slices converged.
[0024] According to the attached Figure 1-3 As shown, the processing method includes the following steps: Step 1: Lay the front packaging material on the front plate material; Step 2: A plurality of positive and negative electrode points are provided on the power generation unit, and a conductive material is arranged on the battery sheet of the power generation unit; Step 3: Use a robot to lay the power generation units on the string device one by one; Step 4: Use a robot to lay the conductive tape on the electrode points of the power generation unit in sequence, so that the conductive material is between the power generation unit and the conductive tape to form an effective contact; Step 5: The battery string stack is baked and heated, and the conductive material is partially cured after being heated, so that the power generation unit and the conductive tape are pre-bonded; Step 6: Use a mechanical device to lay the battery string with the power generation units in series to the designated position of the front package; Step 7: Lay the busbar conductive tape printed with electrical glue on the string; Step 8: The overlapping positions of the busbar conductive tape and the conductive tape are heated and baked, and the conductive material is partially cured after being heated to form a pre-bond; Step 9: After laying the back packaging material and the backboard material, lamination is performed.
[0025] Furthermore, the front panel material can be glass or a transparent front panel, and the front packaging material can be but is not limited to EVA, EPE, POE, PVB, or an inorganic silica gel material.
[0026] Furthermore, the conductive material is arranged on the battery cell of the power generation unit by dispensing or printing.
[0027] Furthermore, the conductive material can be, but is not limited to, tin-bismuth alloy paste, polymer conductive paste, and silver paste.
[0028] Furthermore, the width of the conductive tape can be 0.5-20 mm; the conductive tape material can be but not limited to single element such as copper, aluminum, silver, gold, nickel, tungsten or alloys of two or more thereof.
[0029] Furthermore, the battery string stack is baked and heated by infrared or baking lamp.
[0030] Furthermore, the heating temperature of the battery string stack does not exceed 150°C.
[0031] It is particularly disclosed that the overlapping positions of the busbar conductive strips and the conductive strips are heated by infrared or baking lamps, and the conductive material is partially cured after being heated.
[0032] Furthermore, an insulating structure layer is provided on the positive and negative grid lines of the power generation unit.
[0033] The connection between the busbar and the power generation unit is pre-bonded by baking and heating, ensuring the firmness and stability of the connection. This connection method not only improves the mechanical strength of the module, but also reduces the failure rate caused by poor connection, thereby extending the service life of the solar cell module. The use of busbar simplifies the structure of the solar cell module and reduces the number of connectors and wires required in the traditional connection method. This not only reduces the manufacturing cost of the module, but also improves the assembly efficiency and production automation of the module.
[0034] 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.
[0035] The busbar conductive ribbon can be customized according to the design requirements of the solar cell module, including the width, length, material and printed glue pattern of the conductive ribbon. This flexibility enables the busbar conductive ribbon to adapt to solar cell modules of different sizes and types and meet diverse market needs.
[0036] Example 1 Step 1: lay the front packaging material on the front plate material. The front plate material can be glass or a transparent front plate. The front packaging material can be but is not limited to EVA, EPE, POE, PVB, or inorganic silica gel material.
[0037] Step 2: Multiple 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. Conductive materials are arranged on the battery cells of the power generation unit by dispensing and printing; the conductive materials can be but are not limited to tin-bismuth alloy paste, polymer conductive paste, and silver paste; Step 3: Use a robot to lay the power generation units on the string device one by one; Step 4: Use a robot to lay the conductive tape on the electrode points of the power generation unit in sequence. The conductive material is between the power generation unit and the conductive tape to form an effective contact. The width of the conductive tape can be 0.5~20mm; the material of the conductive tape can be but not limited to copper, aluminum, silver, gold, nickel, tungsten and other single substances or alloys of two or more thereof; Step 5: Use infrared or baking lamp to bake and heat the battery string stack. The conductive material is partially cured after being heated, and a pre-bonding is formed between the power generation unit and the conductive tape. The heating temperature does not exceed 150°C; Step 6: Use a mechanical device to lay the battery string with the power generation units in series to the designated position of the front package; Step 7: Lay the busbar conductive tape printed with electrical glue on the string; Step 8: The overlapping positions of the busbar conductive tape and the conductive tape are heated by infrared or baking lamp, and the conductive material is partially cured after being heated to form a pre-bond; Step 9: After laying the back packaging material and the backboard material, lamination is performed.
[0038] Example 2 Step 1: Lay the composite material of the front panel and the front packaging. The front panel material can be glass or a transparent front panel, and the front packaging material can be but is not limited to EVA, EPE, POE, PVB, or an inorganic silica gel material, and compound the two together.
[0039] Step 2: Multiple 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. The conductive material is arranged on the conductive tape by dispensing and printing. The conductive material 4 can be, but is not limited to, tin-bismuth alloy paste, polymer conductive paste, and silver paste.
[0040] Step 3: Use a robot to lay the power generation units on the string device one by one; Step 4: Use a robot to lay the conductive tape on the electrode points of the power generation unit in sequence. The conductive material is between the power generation unit and the conductive tape to form an effective contact. The width of the conductive tape can be 0.5~20mm; the material of the conductive tape can be but not limited to copper, aluminum, silver, gold, nickel, tungsten and other single substances or alloys of two or more thereof; Step 5: Use infrared or baking lamp to bake and heat the battery string stack. The conductive material is partially cured after being heated, and a pre-bonding is formed between the power generation unit and the conductive tape. The heating temperature does not exceed 150°C; Step 6: Use a mechanical device to lay the battery string with the power generation units in series to the designated position of the front package; Step 7: Lay the busbar conductive tape printed with electrical glue on the string; Step 8: The overlapping positions of the busbar conductive tape and the conductive tape are heated by infrared or baking lamp, and the conductive material is partially cured after being heated to form a pre-bond; Step 9: After laying the back packaging material and the backboard material, lamination is performed.
[0041] Example 3 Step 1: Lay the composite material of the front panel and the front packaging. The front panel material can be glass or a transparent front panel, and the front packaging material can be but is not limited to EVA, EPE, POE, PVB, or an inorganic silica gel material, and compound the two together.
[0042] Step 2: Multiple 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. Conductive materials are arranged on the battery cells of the power generation unit by dispensing and printing; the conductive materials can be but are not limited to tin-bismuth alloy paste, polymer conductive paste, and silver paste; Step 3: Use a robot to lay the power generation units on the string device one by one; Step 4: Use a robot to lay the conductive tape on the electrode points of the power generation unit in sequence. The conductive material is between the power generation unit and the conductive tape to form an effective contact. The width of the conductive tape can be 0.5~20mm; the material of the conductive tape can be but not limited to copper, aluminum, silver, gold, nickel, tungsten and other single substances or alloys of two or more thereof; Step 5: Use infrared or baking lamp to bake and heat the battery string stack. The conductive material is partially cured after being heated, and a pre-bonding is formed between the power generation unit and the conductive tape. The heating temperature does not exceed 150°C; Step 6: Use a mechanical device to lay the battery string with the power generation units in series to the designated position of the front package; Step 7: Lay the busbar conductive tape printed with electrical glue on the string; Step 8: The overlapping positions of the busbar conductive tape and the conductive tape are heated by infrared or baking lamp, and the conductive material is partially cured after being heated to form a pre-bond; Step 9: After laying the integrated composite material of the back packaging and the back panel, lamination is performed.
[0043] The connection between the busbar and the power generation unit is pre-bonded by baking and heating, ensuring the firmness and stability of the connection. This connection method not only improves the mechanical strength of the module, but also reduces the failure rate caused by poor connection, thereby extending the service life of the solar cell module. The use of busbar simplifies the structure of the solar cell module and reduces the number of connectors and wires required in the traditional connection method. This not only reduces the manufacturing cost of the module, but also improves the assembly efficiency and production automation of the module.
[0044] 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.
[0045] The busbar conductive ribbon can be customized according to the design requirements of the solar cell module, including the width, length, material and printed glue pattern of the conductive ribbon. This flexibility enables the busbar conductive ribbon to adapt to solar cell modules of different sizes and types and meet diverse market needs.
[0046] 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 with cell convergence, characterized in that: The processing method comprises the following steps: Step 1: Lay the front packaging material on the front plate material; Step 2: A plurality of positive and negative electrode points are provided on the power generation unit, and a conductive material is arranged on the battery sheet of the power generation unit; Step 3: Use a robot to lay the power generation units on the string device one by one; Step 4: Use a robot to lay the conductive tape on the electrode points of the power generation unit in sequence, so that the conductive material is between the power generation unit and the conductive tape to form an effective contact; Step 5: The battery string stack is baked and heated, and the conductive material is partially cured after being heated, so that the power generation unit and the conductive tape are pre-bonded; Step 6: Use a mechanical device to lay the battery string with the power generation units in series to the designated position of the front package; Step 7: Lay the busbar conductive tape printed with electrical glue on the string; Step 8: The overlapping positions of the busbar conductive tape and the conductive tape are heated and baked, and the conductive material is partially cured after being heated to form a pre-bond; Step 9: After laying the back packaging material and the backboard material, lamination is performed.
2. The method for processing a solar cell assembly with battery cell convergence according to claim 1, characterized in that: The front plate material can be glass or a transparent front plate, and the front packaging material can be but is not limited to EVA, EPE, POE, PVB, or an inorganic silica gel material.
3. The method for processing a solar cell assembly with battery cell convergence according to claim 1, characterized in that: The conductive material is arranged on the battery sheet of the power generation unit by dispensing or printing.
4. The method for processing a solar cell assembly with battery cell convergence 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.
5. The method for processing a solar cell assembly with battery cell convergence according to claim 1, characterized in that: The width of the conductive tape can be 0.5-20 mm; the material of the conductive tape can be but not limited to single substances such as copper, aluminum, silver, gold, nickel, tungsten or alloys of two or more thereof.
6. The method for processing a solar cell assembly with battery cells converging according to claim 1, characterized in that: The battery string stack is baked and heated by infrared or baking lamp.
7. The method for processing a solar cell assembly with battery cell convergence according to claim 1, characterized in that: The heating temperature of the battery string stack does not exceed 150°C.
8. The method for processing a solar cell assembly with battery cell convergence according to claim 1, characterized in that: The overlapping positions of the busbar conductive strips and the conductive strips are heated by infrared or heating lamps, and the conductive material is partially cured after being heated.
9. The method for processing a solar cell assembly with battery cells converging according to claim 1, characterized in that: An insulating structure layer is arranged on the positive and negative grid lines of the power generation unit.