CN109904283B - Interconnection manufacturing method of solar cell and solar cell module manufactured by interconnection manufacturing method - Google Patents
Interconnection manufacturing method of solar cell and solar cell module manufactured by interconnection manufacturing method Download PDFInfo
- Publication number
- CN109904283B CN109904283B CN201910197260.5A CN201910197260A CN109904283B CN 109904283 B CN109904283 B CN 109904283B CN 201910197260 A CN201910197260 A CN 201910197260A CN 109904283 B CN109904283 B CN 109904283B
- Authority
- CN
- China
- Prior art keywords
- film
- layer
- film layer
- conductive composite
- solar cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The invention discloses an interconnection manufacturing method of a solar cell and a solar cell module manufactured by the interconnection manufacturing method. The existing silicon crystal solar energy component has complex manufacturing process, high packaging cost, complex operation and poor reliability. The interconnection manufacturing method comprises the steps of conducting conductive composite treatment on a manufactured thin film material, and laminating and interconnecting a conductive composite film formed through the conductive composite treatment and a standby membrane to form a solar cell module; the solar cell module comprises a front film layer, a first adhesive film layer, a cell layer and a conductive composite film, wherein the front film layer, the first adhesive film layer, the cell layer and the conductive composite film are integrally formed. The interconnection manufacturing method is convenient to operate, and the manufactured solar cell module is simple and reasonable in overall structure and stable and reliable in packaging.
Description
The technical field is as follows:
the invention particularly relates to an interconnection manufacturing method of a solar cell and a solar cell module manufactured by the interconnection manufacturing method.
Background art:
photovoltaic solar energy is important and one of the fastest growing renewable energy sources. In the past decade, it has been difficult to improve the conversion efficiency of crystalline silicon solar cells represented by PERC and black silicon technologies by 20% or more. The cost of the battery plate is greatly reduced during the process, but is mainly due to the economy of scale.
Currently, the cost of the assembly is higher than the cost of the battery plate. The packaging cost of the module is further reduced, and the method becomes the key that the leveling cost of the photovoltaic solar power generation reaches or is lower than the leveling cost of a power grid in most areas of China.
In the past twenty years, besides the production efficiency improvement and scale expansion brought by replacing manpower with a series welding machine, the crystal silicon assembly packaging technology and process have basically no technical progress. Although some new technologies, such as multiple main grids, half-wafers, shingles, spot welding strips, metal wrap-through (MWT), emitter wrap-through (EWT), and the like, have appeared, the technological changes in the package technology and process are not realized, and it is difficult to effectively reduce the package cost of the package by means of "economy of scale" due to the limitations of the technologies themselves.
Therefore, it is necessary to develop new package technology and process. The current mainstream solar cell interconnection technology: a copper strip, i.e., a solder strip, having a surface coated with a solder material such as a lead-tin alloy is soldered to the busbar of the cell and the back pad of the adjacent cell, usually at a soldering temperature of about 230 c, and if a lead-free solder is used, the soldering temperature may be higher (depending on the composition). The mainstream solar cell and cell solder strip interconnection technology has the following problems:
firstly, the welding temperature is high, and because the expansion coefficient difference between copper and silicon is large, the mechanical impact, thermal shock and residual stress caused by the thermal shock in the welding process can cause micro cracks to be generated on battery pieces on two sides of a main grid line and the thin grid line to be broken, so that the output power and the reliability of the assembly are reduced;
secondly, the shading area of the grid line and the welding strip is large, so that the output power is reduced;
thirdly, the output power is reduced due to high working temperature of the battery;
fourthly, the working procedures are multiple, the process is complex, and the running reliability of the system is reduced;
fifthly, the production efficiency is low and the cost is high.
Therefore, attention is paid to an interconnection technology (hereinafter, referred to as "dense grid technology") in which a full back contact solar cell, that is, a solar cell in which electrodes of the cell are on a non-light-receiving surface of the cell, and a plurality of fine metal wires coated with solder are used instead of solder ribbons.
However, the current dense gate technology has several technical difficulties, mainly including:
firstly, the thin metal wires are not well attached to the battery piece during welding, so that part of the thin metal wires cannot be well combined with electrodes, namely good ohmic contact cannot be formed;
secondly, the fine metal wire and the battery plate electrode are difficult to align accurately.
In order to solve the first problem, in the conventional scheme (i.e. scheme 1), during welding, an elastic flexible bottom plate or a plurality of top pillars arranged below the battery pieces jack up the battery pieces, so that the battery pieces are "bulged"; or a 'arched' bottom plate is adopted, or a metal wire which forms an angle of 90 degrees with the thin metal wire is arranged above the bottom plate for pressing, so that the bonding between the thin metal wire and the battery piece is improved, and the welding is finished at the same station.
The main problems of the above solution are: the requirement for equipment is higher, and the complexity of mechanisms and processes reduces the efficiency and reliability of the processes. On the other hand, because the contact surface between the battery electrode and the metal wire is small, the tension value between the metal wire and the electrode after welding is low, and the risk of insufficient welding or desoldering in the subsequent technical processes of typesetting, circuit connection, lamination and the like is large.
To solve the second problem, wires coated with low temperature alloy solder are fixed to the film in advance. And the scheme of cell interconnection is completed in lamination (i.e., scheme 2). The wire, solder ribbon/film lamination process is hereinafter referred to as the "lamination process" and the film formed thereby is referred to as the "conductive lamination film". The production efficiency of this scheme (scheme 2) is higher compared to scheme 1. But two problems arise from this: the difficulty in selecting the membrane material and the added complexity and cost of the process. EVA is the most common photovoltaic encapsulant film, and has been proven for long-term reliability not only because of its high yield and low price, but also because of its availability and physicochemical properties, such as adhesion to a cell sheet, weather resistance, and the like.
The use of EVA is a reasonable choice in terms of the performance of the encapsulant. But the dimensional instability caused by the high ductility and flexibility of the EVA causes the difficulty in positioning the metal wire or the welding strip in the process of the lamination process and the difficulty in positioning the battery piece and the conductive lamination film. Therefore, the "conductive coating film" of the embodiment 2 is usually a PO film with lower ductility of polyethylene and polypropylene. The PO films such as polyethylene and polypropylene are selected as the film materials, so that the cost is increased, and the risk caused by the long-term reliability problem of the combination between the conductive laminating film and the packaging materials such as EVA is introduced due to the reduction of the adhesive force between the PO films such as polyethylene and polypropylene and the battery piece. The above problems have not been solved effectively so far.
The invention content is as follows:
in order to solve the above-mentioned problems in the background art, an object of the present invention is to provide a method for manufacturing interconnection of solar cells and a solar cell module manufactured thereby.
An interconnection manufacturing method of a solar cell comprises the steps of conducting conductive composite treatment on a manufactured thin film material, and laminating and interconnecting a conductive composite film formed through the conductive composite treatment and a standby diaphragm to form a solar cell module.
As a preferable scheme: the manufacturing process of the film material comprises the following steps: and respectively discharging the second adhesive film layer and the back film layer from respective material rolls, and forming a physically-attached integrated film material by utilizing the high surface energy of the second adhesive film layer and the back film layer and discharging part of air between the second adhesive film layer and the back film layer.
As a preferable scheme: the manufacturing process of the conductive composite film comprises the following steps:
the negative pressure below the punching conveyor belt enables the film material and the metal wire to be adsorbed on the punching conveyor belt, and the power wheel rotates to drive the punching conveyor belt and pull the film material to the first operation platform;
the film material formed by sticking the second adhesive film layer and the back film layer is discharged through a first transmission wheel system;
the metal wire is discharged through a second transmission wheel system;
the upper and lower hot pressing operation process: the film material and the metal wires below the film material are attached to the first operating platform in a rolling mode of the upper hot air module and the lower heating module to form a conductive composite film;
and the conductive composite film realizes blanking through a third transmission wheel system.
As a preferable scheme: cutting operation: and (3) longitudinally cutting the conductive composite film which is pressed into a whole through a cutting device according to the design size requirement, and preparing blanking after cutting.
As a preferable scheme: when electrically conductive complex film carries out combined machining, the rete conveys before will on the second operation platform, and rete and first rete before laying in proper order in the data send process, arrange a plurality of battery pieces on the rete before having laid first rete, form for use the diaphragm.
As a preferable scheme: and laying the conductive composite film on the standby film, aligning the metal wires of the conductive composite film to the electrodes of the cell, then performing circuit connection, and finally performing a lamination interconnection process to form the solar cell module.
The solar cell module manufactured by the interconnection manufacturing method comprises a front film layer, a first adhesive film layer, a cell layer and a conductive composite film, wherein the front film layer, the first adhesive film layer, the cell layer and the conductive composite film are integrally formed.
As a preferable scheme: the battery layer includes a plurality of battery pieces, and a plurality of battery piece levels set up side by side between first rete and electrically conductive complex film, and electrically conductive complex film includes second rete, notacoria layer and wire, second rete and notacoria layer are from last to arranging system as an organic whole down in proper order.
As a preferable scheme: instead of a wire, a solder strip.
As a preferable scheme: the first adhesive film layer, the second adhesive film layer and the middle adhesive film layer are all EVA films; the front film layer is an ETFE film, a PVDF film, an FEP film or glass.
Compared with the prior art, the invention has the beneficial effects that:
the front film layer, the first adhesive film layer, the battery layer and the conductive composite film are matched with each other to form the battery, so that the whole structure is simple and reasonable, and the packaging is stable and reliable.
And compared with the traditional component packaging process and the scheme for fixing the metal wire on the PO membrane, the battery series welding and typesetting processes are eliminated, so that the manufacturing process is simpler, more reliable and more efficient.
And thirdly, compared with the traditional assembly packaging process, the welding/laminating is completed at one time because the welding procedure is removed. The process is simpler and energy-saving.
Compared with the scheme of fixing the metal wire to the PO film, when the metal wire or the welding strip is fixed to the film formed by bonding TPT and EVA through the so-called laminating process, the back film layer formed by the TPT has good dimensional stability, and the EVA has good adhesive force with the TPT, the metal wire and the battery piece, so that the metal wire can be accurately and stably fixed, the packaging reliability is guaranteed, and the process is simpler and more reliable under the condition of not introducing other transparent film materials.
Compared with the traditional assembly packaging process of directly welding the metal wire to the battery piece by using a series welding machine, the scheme is simpler and more reliable, the welding temperature is lower, the welding effect is better, and the metal wire or the welding belt can be more reliably attached to the battery piece by the metal wire fixed on the EVA.
Sixth, the invention can effectively reduce the working temperature of the component to 3-6 ℃, thereby reducing the power loss caused by the temperature rise of the component.
And seventhly, the battery piece has more welding spots and is more reliable, and even if the battery piece is split, the adverse effect is small.
The invention can be applied to semitransparent and semi-flexible components, and can also be applied to double-glass components and double-sided battery layer pieces.
The invention can be made into semi-flexible components, and when the back film is made of transparent materials, such as ETFE + EVA, the semi-transparent components can be made.
The invention is suitable for the crystalline silicon back contact solar cell, and the heterojunction back contact cell or other cells with electrodes arranged on the back side in a flat line manner.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of a front view structure of the present invention;
FIG. 2 is a schematic cross-sectional view of a front view structure of a conductive composite film;
FIG. 3 is a schematic flow chart of the operation of the interconnect fabrication method;
FIG. 4 is a schematic top view of a process flow for interconnect fabrication in accordance with the present invention;
fig. 5 is a schematic circuit diagram of the battery cell.
In the figure, 1-anterior membrane layer; 2-a first glue film layer; 3-a battery piece; 4-a second glue film layer; 5-a back film layer; 6-a metal wire; 9-a junction box; 10-a first driving wheel; 11-a first steering wheel; 12-a first tension wheel; 13-a first ion air gun; 14-a second capstan; 15-a perforated conveyor belt; 16-a second steerable wheel; 17-a second tension pulley; 18-a positioning groove; 19-a first operating platform; 20-upper hot air module; 21-a lower heating module; 22-a roller module; 23-a third driving wheel; 24-a third steerable wheel; 25-a third tension pulley; 26-a second ion air gun; 27-a negative pressure chamber; 28-high pressure fan; 29-tension plate; 30-a cutting device; 31-a blanking device; 32-second operating platform.
The specific implementation mode is as follows:
in order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
The first embodiment is as follows: as shown in fig. 1, 2, 3, 4 and 5, the present embodiment includes a thin film material manufacturing process, a conductive composite film manufacturing process, a cutting operation, a membrane sheet to be used manufacturing process and a lamination interconnection process;
the manufacturing process of the film material comprises the following steps: discharging the second adhesive film layer 4 and the back film layer 5 from the material roll, and forming a roll of physically attached film material by utilizing the high surface energy of the second adhesive film layer 4 and the back film layer 5 and discharging part of air between the two; in the operation process, at the position of the first driving wheel 10, the first driving wheel 10 is matched with the plurality of first tension wheels 12, the second adhesive film and the back film respectively enter the first driving wheel 10 from the material roll, and form a roll of physically-attached film material by utilizing the high surface energy of the second adhesive film layer 4 and the back film layer 5 and discharging partial air between the two in the transmission process of the plurality of first tension wheels 12, and send the roll of physically-attached film material to the punching conveyor belt 15.
The manufacturing process of the conductive composite film comprises the following steps:
the negative pressure chamber 27 below the punching conveyor belt 15 enables the film material and the metal wires to be adsorbed on the punching conveyor belt 15, and the power wheel rotates to drive the punching conveyor belt 15 and pull the film material to the first operating platform 19; a high pressure fan 28 is connected below the negative pressure chamber 27.
The film material formed by pasting the second adhesive film layer 4 and the back film layer 5 realizes the material discharging function through a first driving wheel system consisting of a first driving wheel 10, a first steering wheel 11, a first tension wheel 12 and a first ion air gun 13, and absorbs the speed difference between the first driving wheel 10 and the punching conveyor belt 15 and prevents adhesion;
the metal wire 6 realizes the discharging function of the metal wire 6 through a second driving wheel system consisting of a second driving wheel 14, a second steering wheel 16, a second tension wheel 17 and two positioning grooves 18, and absorbs the speed difference between the second driving wheel 14 and the punching conveyor belt 15, thereby preventing the metal wire 6 from deviating;
the upper and lower hot pressing operation process: the film material is positioned above the metal wire 6, and the film material and the metal wire 6 are attached to each other on the first operating platform 19 in a rolling mode of the upper hot air module 20 and the lower heating module 21 to form a conductive composite film;
the temperature of the lower heating module is adjustable and controllable, and the heating temperature is controlled to be 60-140 ℃ according to the composition material of the second adhesive film layer 4; the upper hot air module 20 consists of one or a plurality of hot air guns and is used for auxiliary heating, and the temperature and the air quantity of the upper hot air module 20 are adjustable;
one or more roller modules 22 arranged above the first operating platform 19 move forward or backward along the movement direction of the punching conveyor belt 15, the speed and the stroke are controllable, the control process is the prior art, the roller modules 22 are perpendicular to the movement direction of the punching conveyor belt 15 and the movement direction is backward, the roller modules 22 are composed of one or more independent single roller modules which are arranged together, and the roller modules 22 provide flexible and adjustable pressure so as to realize that the metal wire 6, the second adhesive film layer 4 and the back film layer 5 are jointed into a whole to form a conductive composite film;
the conductive composite film realizes the blanking function through a third transmission wheel system consisting of a third driving wheel 23, a third steering wheel 24, a second ion air gun 26, a tension plate 29 and a plurality of third tension wheels 25, and absorbs the speed difference between the third driving wheel 23 and the punching conveyor belt 15, thereby preventing adhesion;
in the process, the metal wire 6 can be replaced by a welding strip; the back film layer 5 is a back film adhesive film.
Cutting operation: the conductive composite film pressed into a whole is longitudinally cut according to the design size requirement through a cutting device 30, and blanking is prepared after cutting and enters a blanking device 31.
The manufacturing process of the membrane to be used comprises the following steps: when electrically conductive complex film carries out combined machining, carry out the conveying in step with preceding rete 1 and glass on the second operation platform 32, lay preceding rete 1 and first rete 2 in proper order in the data send process, arrange a plurality of battery pieces 3 on the preceding rete 1 that has spread first rete 2 again, form for use the diaphragm.
And (3) a lamination interconnection process: conveying a conductive composite film formed by composite processing to the position right above a standby membrane through a blanking device 31, laying the conductive composite film on the standby membrane, aligning a metal wire 6 fixed on the conductive composite film to a battery electrode, conveying the battery electrode to the next station through a punching conveyor belt 15, performing circuit connection, and then entering a lamination interconnection process;
and in the lamination interconnection process, the front film layer 1, the first adhesive film layer 2, the battery layer and the conductive composite film are further packaged into a whole through a lamination process of vacuumizing, heating and pressurizing, and the interconnection of the metal wire 6 and the battery piece is completed to form the solar battery assembly.
In the process, the solar cell module can be further additionally provided with the frame, the junction box and the cable, namely the manufacturing process of the solar cell module with the frame, the junction box and the cable is completed, or the frame is not added, so that the frameless solar cell module is formed.
In the process, various devices included in the first transmission wheel system, the second transmission wheel system, the third transmission wheel system and the roller module are all existing devices, and the working processes of the various devices mentioned in the process are the same as those in the prior art.
The second embodiment is as follows: as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, this embodiment includes preceding rete 1, first rete 2, battery layer and electrically conductive complex film, preceding rete 1, first rete 2, battery layer and electrically conductive complex film set gradually from last to bottom, and the battery layer includes a plurality of battery pieces 3, and a plurality of battery pieces 3 level set up side by side between first rete 2 and electrically conductive complex film, and electrically conductive complex film includes second rete 4, notacoria layer 5 and wire 6, second rete 4 and notacoria layer 5 are arranged as an organic whole from last to bottom in proper order. The solar cell module has double functions of photovoltaic power generation and building tiles, and is light and ultrathin according to sample tests, and the thickness of the solar cell module is measured to be less than 5 mm.
Further, the wire 6 is replaced with a solder strip.
Further, the first adhesive film layer 2, the second adhesive film layer 4 and the middle adhesive film layer are all EVA films. The EVA membrane is an adhesive membrane, and is an existing product. EVA membrane ethylene-vinyl acetate copolymer membrane.
Further, the shape of the battery piece 3 is rectangular. The cell 3 is a photovoltaic cell, specifically a PERC cell, which is an existing product.
Further, a plurality of battery pieces 3 are arranged between the first adhesive film layer 2 and the metal wire 6 in a rectangular array. The film materials of the second adhesive film layer 4 and the back film layer 5 and the metal wire 6 are made into a conductive laminating film through a so-called laminating process without introducing new film materials such as polyethylene, polypropylene and the like; the conductive composite film itself may constitute a back film layer, and the conductive composite film is full-sized at this time, i.e., the conductive composite film is the complete back film layer 5. Specifically, the width of the device is the required width of the component, and the length of the device can be divided according to the required length of the component; the metal wire or the welding strip is coated with low-temperature metal solder, the full back contact cell piece is accurately placed on the front film layer 1 with the light receiving surface facing downwards, and then the full back contact cell piece is covered by the conductive composite film, and the metal wire or the welding strip in the conductive composite film contacts the electrode of the full back contact cell piece 3; the interconnection of the battery pieces 3 is realized by lamination.
Further, a junction box 9 is arranged on the upper end face of the front film layer 1, and the junction box 9 is connected with the battery layer. The junction box 9 is an existing product and is connected with the plurality of battery pieces 3 through lines to control the working conditions of the battery pieces 3. The working process of the terminal box 9 and the battery piece 3 is the same as the prior art. The cell 3 is a crystalline silicon solar cell, and the connection mode of the plurality of cells 3 is a multi-wire interconnection mode, namely the cells are connected through 12-22 metal wires; the cell 3 is n-IBC, and the flexible transparent electrode films are interconnected; PERC battery or other high-efficiency crystal silicon battery, and welding strips.
The third concrete implementation mode: in this embodiment, the upper portion of the battery layer is referred to as a front film layer 1, the lower surface of the front film layer 1 is bonded to a first adhesive film layer 2, the front film layer 1 is modified to ensure sufficient bonding strength with the EVA film, and the outer surface thereof is subjected to an antireflection texturing process. The front film layer 1 is an ETFE film, a PVDF film or an FEP film. The ETFE membrane is an ethylene tetrafluoroethylene polymer membrane, the PVDF membrane is a polyvinylidene fluoride membrane, and the FEP membrane is a fluorinated ethylene propylene polymer membrane.
The anterior membrane layer 1 is also optional: photovoltaic glass; or organic polymer films of PVDF, FEP, etc.;
the first adhesive film layer 2 can also be selected from: the EVA is replaced by transparent polymeric film such as PO, PA, PE, PET and the like.
The fourth concrete implementation mode: the cell layer is a back contact cell, and the cell 3 is a crystalline silicon back contact solar cell; the battery piece 3 is also optional: heterojunction back contact cells, or cells with other electrodes all on the back and all arranged in parallel straight lines.
The fifth concrete implementation mode: the embodiment is further limited by the first embodiment, the metal wire 6 is formed by arranging a plurality of metal wires and is oxygen-free copper; 12-38 pieces; the diameter is 200 to 300 μm. A solder layer: BiPbSn alloy: bi wt%: 50-52.5%; pb wt%: 28-32%; sn wt%: 15.5 to 22 percent. Or the solder layer can be selected from: bismuth tin alloy: 57% of bismuth and 43% of tin; indium tin alloy: 51.7% of indium and 48.3% of tin; bismuth tin silver alloy: 57% of bismuth, 41% of tin and 2% of silver;
the sixth specific implementation mode: when the metal wire 6 is replaced by a welding strip, the welding strip is formed by horizontally arranging a plurality of oxygen-free copper in parallel, and the number of the oxygen-free copper is 12-38; the width value range of the oxygen-free copper is 0.6-2.4 mm; the thickness of the oxygen-free copper ranges from 0.3 mm to 1.8 mm. A solder layer: BiPbSn alloy: bi wt%: 50-52.5%; pb wt%: 28-32%; sn wt%: 15.5 to 22 percent. Or the solder layer can be selected from: bismuth tin alloy: 57% of bismuth and 43% of tin; indium tin alloy: 51.7% of indium and 48.3% of tin; bismuth tin silver alloy: 57% of bismuth, 41% of tin and 2% of silver;
the seventh embodiment: this embodiment is a further limitation of the first embodiment, and the material for forming the backing layer 5 may be selected as follows:
when the back film layer 5 is a TPT composite back film, the lower surface of the TPT composite back film is in contact with an air surface, the upper surface of the TPT composite back film is bonded with an EVA surface, and the TPT composite back film is formed by compounding PVF, PET and PVF.
When the back film layer 5 is a TPE composite back film, the lower surface of the TPE composite back film is in contact with an air surface, the upper surface of the TPE composite back film is bonded with an EVA surface, and the TPE composite back film is formed by compounding PVF, PET and EVA.
The backing layer 5 optionally further comprises: the upper layer is EVA, PVDF, PO, PE or PA; the lower layer is ETFE, PVF, PO, PE or PA, and can also be a composite membrane formed by ETFE, PVF, PVDF and EVA.
The specific implementation mode is eight: the present embodiment is further limited to the first, second, third, fourth, fifth, sixth, or seventh embodiments, wherein each of the plurality of battery pieces is rectangular, and the plurality of battery pieces are arranged between the first adhesive film layer and the metal wire in a rectangular array.
The specific implementation method nine: the present embodiment will be described with reference to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, in which the interconnection manufacturing method in the present embodiment is to perform a conductive lamination process on a prepared film material, and laminate and interconnect a conductive composite film formed through the conductive lamination process and a film to be used to form a solar cell module.
Further, the manufacturing process of the film material comprises the following steps: and respectively discharging the second adhesive film layer 4 and the back film layer 5 from respective material rolls, and forming a physically-attached integrated film material by utilizing the high surface energy of the second adhesive film layer 4 and the back film layer 5 and discharging part of air between the two layers.
Further, the manufacturing process of the conductive composite film comprises the following steps:
the negative pressure below the punching conveyor belt enables the film material and the metal wire 6 to be adsorbed on the punching conveyor belt 15, and the power wheel rotates to drive the punching conveyor belt 15 and pull the film material to the first operating platform 19;
the film material formed by pasting the second adhesive film layer 4 and the back film layer 5 realizes the material discharging function through a first driving wheel system consisting of a first driving wheel 10, a first steering wheel 11, a first tension wheel 12 and a first ion air gun 13, and absorbs the speed difference between the first driving wheel 10 and the punching conveyor belt 15 and prevents adhesion;
the metal wire 6 realizes the discharging function of the metal wire 6 through a second driving wheel system consisting of a second driving wheel 14, a second steering wheel 16, a second tension wheel 17 and a positioning groove 18, and absorbs the speed difference between the second driving wheel 14 and the punching conveyor belt 15, so that the metal wire 6 is prevented from deviating;
the upper and lower hot pressing operation process: the film material is positioned above the metal wire 6, and the film material and the metal wire 6 are attached to each other on the first operating platform 19 in a rolling mode of the upper hot air module 20 and the lower heating module 21 to form a conductive composite film;
the temperature of the lower heating module 21 is adjustable and controllable, and the heating temperature of the second adhesive film layer 4 is controlled at 100 ℃; the upper hot air module 20 is composed of one or more hot air guns for auxiliary heating, the temperature and air quantity of the upper hot air module 20 are adjustable, and the adjusting process is the prior art.
One or more roller modules 22 arranged above the first operating platform 19 move forward or backward along the movement direction of the punching conveyor belt 15, the speed and the stroke are controllable, the roller modules are perpendicular to and backward to the movement direction of the punching conveyor belt 15, each roller module 22 is composed of one or more independent and co-mounted roller monomer modules, and the roller modules 22 provide flexible and adjustable pressure so as to enable the metal wire 6, the second adhesive film layer 4 and the back film layer 5 to be attached to form a conductive composite film integrally;
the conductive composite film realizes the blanking function through a third transmission wheel system consisting of a third driving wheel, a third steering wheel, a tension plate and a second ion air gun, and absorbs the speed difference between the driving wheel and the punching conveyor belt, thereby preventing adhesion.
Further, the clipping operation: and (3) longitudinally cutting the conductive composite film which is pressed into a whole through a cutting device according to the design size requirement, and preparing blanking after cutting.
Further, when electrically conductive complex film carries out combined machining, the rete conveys before will on the second operation platform 32, and rete 1 and first rete 2 before laying in proper order in the data send process, arrange a plurality of battery pieces 3 on the rete 1 before having laid first rete 2, form for use the diaphragm.
Further, the conductive composite film formed by composite processing is conveyed to the position right above the standby membrane through a blanking device 32, the conductive composite film is laid on the standby membrane, at the moment, the metal wire 6 fixed on the conductive composite film is aligned to the electrode of the battery piece 3, and is conveyed to the next station through a punching conveyor belt 15 for circuit connection, and then the lamination interconnection process is carried out;
further, in the lamination interconnection process, the front film layer 1, the first adhesive film layer 2, the battery layer and the conductive composite film are further packaged into a whole through a lamination process of vacuumizing, heating and pressurizing, and the interconnection of the metal wire 6 and the battery piece 3 in the battery layer is completed to form the solar battery assembly. Other operation steps not mentioned are the same as those in the first embodiment.
Claims (7)
1. A method for manufacturing an interconnection of solar cells, characterized by: the interconnection manufacturing method comprises the steps of conducting conductive composite treatment on a manufactured thin film material, and laminating and interconnecting a conductive composite film formed through the conductive composite treatment and a standby diaphragm to form a solar cell module;
the manufacturing process of the film material comprises the following steps: respectively discharging the second adhesive film layer and the back film layer from respective material rolls, and forming a physically-attached integrated film material by utilizing the high surface energy of the second adhesive film layer and the back film layer and discharging part of air between the second adhesive film layer and the back film layer;
the manufacturing process of the conductive composite film comprises the following steps:
the negative pressure below the punching conveyor belt enables the film material and the metal wire to be adsorbed on the punching conveyor belt, and the power wheel rotates to drive the punching conveyor belt and pull the film material to the first operation platform;
the film material formed by sticking the second adhesive film layer and the back film layer is discharged through a first transmission wheel system;
the metal wire is discharged through a second transmission wheel system;
the upper and lower hot pressing operation process: the film material and the metal wires below the film material are attached to the first operating platform in a rolling mode of the upper hot air module and the lower heating module to form a conductive composite film;
the conductive composite film realizes blanking through a third transmission wheel system;
the manufacturing process of the conductive composite film comprises the following cutting operation: and the cutting operation is to longitudinally cut the conductive composite film which is pressed into a whole by a cutting device according to the design size requirement, and prepare blanking after cutting.
2. The method of claim 1, wherein: when electrically conductive complex film carries out combined machining, the rete conveys before will on the second operation platform, and rete and first rete before laying in proper order in the data send process, arrange a plurality of battery pieces on the rete before having laid first rete, form for use the diaphragm.
3. The method of claim 1, wherein: and laying the conductive composite film on the standby film, aligning the metal wires of the conductive composite film to the electrodes of the cell, then performing circuit connection, and finally performing a lamination interconnection process to form the solar cell module.
4. A solar cell module formed by the process of claim 1, wherein: the battery comprises a front film layer, a first adhesive film layer, a battery layer and a conductive composite film, wherein the front film layer, the first adhesive film layer, the battery layer and the conductive composite film are integrally formed.
5. The solar cell module of claim 4, wherein: the battery layer includes a plurality of battery pieces, and a plurality of battery piece levels set up side by side between first rete and electrically conductive complex film, and electrically conductive complex film includes second rete, notacoria layer and wire, second rete and notacoria layer are from last to arranging system as an organic whole down in proper order.
6. The solar cell module according to claim 4 or 5, wherein: instead of a wire, a solder strip.
7. The solar cell module of claim 6, wherein: the first adhesive film layer, the second adhesive film layer and the middle adhesive film layer are all EVA films; the front film layer is an ETFE film, a PVDF film, an FEP film or glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910197260.5A CN109904283B (en) | 2019-03-15 | 2019-03-15 | Interconnection manufacturing method of solar cell and solar cell module manufactured by interconnection manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910197260.5A CN109904283B (en) | 2019-03-15 | 2019-03-15 | Interconnection manufacturing method of solar cell and solar cell module manufactured by interconnection manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109904283A CN109904283A (en) | 2019-06-18 |
| CN109904283B true CN109904283B (en) | 2021-08-03 |
Family
ID=66952663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910197260.5A Active CN109904283B (en) | 2019-03-15 | 2019-03-15 | Interconnection manufacturing method of solar cell and solar cell module manufactured by interconnection manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109904283B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531061A (en) * | 2020-12-14 | 2021-03-19 | 宣城睿晖宣晟企业管理中心合伙企业(有限合伙) | Solar cell module and manufacturing method thereof |
| CN112820800B (en) * | 2020-12-31 | 2023-04-14 | 保定易通光伏科技股份有限公司 | Device and method for machining segmented triangular welding strip |
| CN112786727B (en) * | 2021-02-01 | 2022-11-22 | 无锡市联鹏新能源装备有限公司 | Composite membrane for mutual combination of main-grid-free heterojunction solar cell modules and preparation method thereof |
| CN113036004B (en) * | 2021-03-08 | 2022-04-12 | 无锡市联鹏新能源装备有限公司 | Preparation method of main-grid-free solar cell electrode composite film |
| CN113013297B (en) * | 2021-03-08 | 2022-12-09 | 无锡市联鹏新能源装备有限公司 | Preparation method of grid-line-free heterojunction battery assembly |
| CN113257935B (en) * | 2021-05-12 | 2022-07-08 | 常州时创能源股份有限公司 | Series connection assembly for photovoltaic cell layer and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012088098A2 (en) * | 2010-12-20 | 2012-06-28 | Solar Machines Incorporated | Single cell encapsulation and flexible-format module architecture for photovoltaic power generation and method for constructing the same |
| CN206134704U (en) * | 2016-08-31 | 2017-04-26 | 西安泰力松新材料股份有限公司 | No main grid wire for solar wafer / membrane compounding machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101627377B1 (en) * | 2009-12-09 | 2016-06-03 | 엘지전자 주식회사 | Solar cell module |
| WO2013006687A2 (en) * | 2011-07-05 | 2013-01-10 | Avery Dennison Corporation | Photovoltaic modules including an extruded layer of insulating material and methods |
| CN103890968A (en) * | 2011-10-31 | 2014-06-25 | E.I.内穆尔杜邦公司 | Integrated back-sheet for back contact photovoltaic module |
| EP3046151B1 (en) * | 2015-01-16 | 2019-04-03 | Somont GmbH | Method and apparatus of fabricating an interconnector assembly |
| CN206505903U (en) * | 2017-02-22 | 2017-09-19 | 广东爱康太阳能科技有限公司 | The vacuum suction transmission belt conveyed for silicon chip of solar cell |
-
2019
- 2019-03-15 CN CN201910197260.5A patent/CN109904283B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012088098A2 (en) * | 2010-12-20 | 2012-06-28 | Solar Machines Incorporated | Single cell encapsulation and flexible-format module architecture for photovoltaic power generation and method for constructing the same |
| CN206134704U (en) * | 2016-08-31 | 2017-04-26 | 西安泰力松新材料股份有限公司 | No main grid wire for solar wafer / membrane compounding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109904283A (en) | 2019-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109904283B (en) | Interconnection manufacturing method of solar cell and solar cell module manufactured by interconnection manufacturing method | |
| EP2234181B1 (en) | Manufacture method for a photovoltaic module | |
| US20180175223A1 (en) | Solar cell and solar cell module | |
| CN113066885A (en) | Series photovoltaic cell assembly and packaging method thereof | |
| CN104282788A (en) | Main-grid-free high-efficiency back contact solar cell module, main-grid-free high-efficiency back contact solar cell assembly and manufacturing technology of main-grid-free high-efficiency back contact solar cell assembly | |
| US20220173261A1 (en) | Photovoltaic cell and string and associated methods | |
| CN104253169A (en) | Main-grid-free high-efficiency back contact solar battery module, assembly and preparing process | |
| US20220271190A1 (en) | Shingled solar cell panel and method of manufacturing the same | |
| CN113037210A (en) | Battery string structure, photovoltaic module and manufacturing method of photovoltaic module | |
| WO2022193578A1 (en) | Solar cell connecting method | |
| CN217280809U (en) | No main grid photovoltaic module with film | |
| CN113851551A (en) | Battery string, photovoltaic module, production equipment and production method of battery string | |
| CN114864721A (en) | Main-grid-free photovoltaic module, preparation method thereof and welding strip welding method | |
| CN105555689B (en) | The connection method of conductive adhesive tape and conductive adhesive tape and solar module and its manufacturing method | |
| CN215815903U (en) | Photovoltaic module | |
| CN215815896U (en) | Solar cell module | |
| CN104269454A (en) | High-efficiency back contact solar cell back sheet without main grids, high-efficiency back contact solar cell assembly without main grids and manufacturing technology | |
| CN204204882U (en) | Without main grid high efficiency back contact solar cell assembly | |
| Spath et al. | A novel module assembly line using back contact solar cells | |
| US11189738B2 (en) | Solar cell side surface interconnects | |
| CN101728460B (en) | Solar battery for solar mobile phone battery and preparation method thereof | |
| CN111725335A (en) | HBC high-efficiency solar cell back electrode connection and packaging integrated structure | |
| CN204230264U (en) | Without main grid high efficiency back contact solar cell backboard and assembly | |
| CN216054739U (en) | Battery string, photovoltaic module and production equipment of battery string | |
| JP4467466B2 (en) | Manufacturing method of solar cell module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210730 Address after: 438000 building E3, Huanggang Optical Valley United Technology City, No. 19, Xingang North Road, Huangzhou District, Huanggang City, Hubei Province Patentee after: HUBEI MEIGE NEW ENERGY TECHNOLOGY Co.,Ltd. Address before: 430000 999 new high tech Avenue, East Lake New Technology Development Zone, Wuhan, Hubei Patentee before: FLEXTECH Co. |