CN109994571A - A production method and production equipment of a back contact solar cell panel - Google Patents

Abstract

The invention relates to solar cell production equipment, in particular to a production method and production equipment for back-contact solar cell panels, belonging to the field of industrial automation. The technical problem to be solved by the present invention is to provide a method for producing a back-contact solar cell panel, so as to improve the assembly quality of the components and improve the stability of the product. In the production method of the back-contact solar cell panel of the present invention, the light-transmitting support layer is firstly positioned, then corresponding structures are sequentially arranged on the light-transmitting support layer to form a semi-finished component, and finally the semi-finished component is heated and heated. Press and cool to room temperature to form a solar cell module. In this method, the light-transmitting support layer is first positioned, which can effectively ensure the positional accuracy of the light-transmitting support layer. The positions of the layers are precise, which improves the assembly precision of the solar cell module, and the solar cell module is not easy to be scrapped during the assembly process.

Description

A production method and production equipment of a back contact solar cell panel

technical field

The invention relates to solar cell production equipment, in particular to a production method and production equipment for back-contact solar cell panels, belonging to the field of industrial automation.

Background technique

After decades of continuous development in the solar photovoltaic industry, the power generation efficiency of traditional string-welded modules has basically reached its limit. How to further improve the power generation efficiency of photovoltaic modules is the basic direction of industry development. At present, the research directions of improving the power generation efficiency of modules in the market mainly include two directions: improving the conversion efficiency of solar cells themselves and optimizing the packaging form of modules. Contact cell assemblies have considerable advantages in finding efficiencies compared to conventional assemblies. Therefore, in the future development of photovoltaics, back-contact cells will definitely occupy a certain position, so the development and production of equipment for back-contact cell components has a bright future.

The back-contact battery assembly is composed of a light-transmitting rigid support, a thermoplastic film layer, a solar cell, an insulating layer, and a positive and negative electrode interconnection layer. In the actual production of modules, in order to ensure the continuity between the cell electrodes and the positive and negative electrode interconnection layers, a conductive adhesive is used to realize the interconnection of the positive and negative electrodes of the cell.

The assembly method of the back-contact battery assembly in the prior art is unreasonable, the assembly quality of the assembly cannot be effectively guaranteed after the assembly is completed, and the assembly is likely to be scrapped.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a method for producing a back-contact solar cell panel, so as to improve the assembly quality of the components and improve the stability of the product.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is:

A method for producing a back-contact solar cell panel, comprising the following steps:

Positioning the light-transmitting support layer;

Lay a film layer on the light-transmitting support layer;

Laying solar cells on the thin film layer, and making the solar cells evenly distributed on the thin film layer;

A conductive adhesive is applied on the solar cell sheet, and the conductive adhesive covers the electrodes on the solar cell sheet;

An insulating layer is laid on the solar cell sheet, and a through hole is arranged on the insulating layer, and the through hole allows the conductive adhesive to pass through the insulating layer;

An electrode interconnection layer is arranged on the insulating layer, and the conductive adhesive passing through the insulating layer is in contact with the electrode interconnection layer and conducts electricity to form a semi-finished component;

After heating the semi-finished component in a vacuum state, pressure is applied to the semi-finished component and maintained, and then the semi-finished component is cooled to a natural temperature.

In the method for producing a back-contact solar cell panel according to the present invention, the light-transmitting support layer is first positioned, and then corresponding structures are sequentially arranged on the light-transmitting support layer to form a semi-finished component, and finally the semi-finished component is heated and heated. Press and cool to room temperature to form a solar cell module. In this method, the light-transmitting support layer is first positioned, which can effectively ensure the positional accuracy of the light-transmitting support layer. The positions of the layers are precise, which improves the assembly precision of the solar cell module, and the solar cell module is not easy to be scrapped during the assembly process.

Preferably, after the thin film layer is laid on the light-transmitting support layer and before the conductive adhesive is coated on the solar cell, the thin film layer is heated to melt at least a part of the thin film layer, and the conductive adhesive is applied after the melted thin film layer is cured. mixture.

After the film layer is cured, it can fix the solar cell, further improve the positional accuracy of the solar cell relative to the light-transmitting support layer, and the solar cell is not easy to dislocate in the subsequent process, and the solar cell module is assembled during the assembly process. Not easy to damage.

Preferably, the thin film layer is heated at a temperature of 50 degrees Celsius to 80 degrees Celsius.

This temperature range will not affect the performance of the solar panel and avoid damage to the solar cell due to excessive temperature.

Preferably, the film layer is ethylene vinyl acetate.

Preferably, the insulating layer is a PET layer, and an ethylene vinyl acetate layer is wrapped around the PET layer.

A production equipment for back-contact solar cell panels, comprising a rack, an assembly head for assembling back-contact solar cell panels is arranged on the rack, a first conveyor is also arranged on the rack, and a first conveyor is arranged on the rack. The machine is provided with a support frame driven by the first conveyor and circulated among all the assembling heads, and the frame is also provided with a support frame for conveying the support frame after the last assembly process to the first assembly process. The second conveyor, the rack is provided with a lower rack that transfers the support frame on the first conveyor to the second conveyor, and the rack is also provided with a second conveyor on the rack The supporting frame is transferred to the rack mounter on the first conveyor, and the rack is provided with a mover for removing the back-contact solar cell panels assembled into semi-finished products.

The present invention provides a production equipment for back-contacting solar cell panels, comprising a rack, an assembly head is arranged on the rack, and a first conveyor, a second conveyor, an upper rack and a lower rack are also arranged on the rack The first conveyor is used to drive the support frame to flow between the various processes, the second conveyor is used to transfer the empty support frame from the last process to the front of the first process, so that the support frame can be used cyclically, and the transfer device is used for The components assembled into semi-finished products are transferred to the next process. Compared with the prior art, the solution greatly improves the production efficiency of the solar cell assembly, and also improves the assembly precision of the solar cell assembly.

Preferably, the assembly head includes a support layer placer, a thin film layer placer, a heater, a conductive adhesive applicator, an insulating layer placer and an electrode interconnection layer placer.

Preferably, the support layer placer, the film layer placer, the heater, the conductive adhesive applicator, the insulating layer placer and the electrode interconnection layer placer are sequentially arranged on the frame, and the transfer device on the side of the electrode interconnection layer placer away from the insulating layer placer.

Preferably, both the upper rack and the lower rack include a lifter that moves in a vertical direction and a rack shifter arranged on the lifter to transfer the support frame, and a support is provided on the lifter a seat, and the rack shifter is fixed on the support seat.

The upper and lower racks have reasonable structure and good stability, which improves the stability of the equipment during operation.

Preferably, the lifter includes a driver fixed on the rack, the driver includes a telescopic component, the support base is fixed on the telescopic component, and the rack is further provided with a support for the support A guide rail for seat guide, a guide wheel matched with the guide rail is arranged on the support seat, the guide wheel is arranged on the support seat through a connecting rod, and the guide wheel is rotatably connected to the connecting rod through a wheel shaft The connecting rod is fixed on the support seat by bolts.

The arrangement of the guide rail and the guide wheel improves the moving precision of the support seat, thereby improving the running precision of the equipment.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a back-contact solar cell panel.

Figure 2 is a schematic diagram of the production equipment.

Label description:

1. Light-transmitting support layer, 2. Thin film layer, 3. Solar cell, 4. Insulating layer, 5. Electrode interconnection layer, 6. Frame, 7. Lower frame, 8. Loader, 9. Support layer Placer, 10, Film Layer Placer, 11, Heater, 12, Conductive Adhesive Applicator, 13, Insulation Layer Placer, 14, Electrode Interconnection Layer Placer, 15, Transferr.

Detailed ways

The present invention will be further described in detail below in conjunction with the examples. The following examples are to explain the present invention and the present invention is not limited to the following examples.

Example 1

A method for producing a back-contact solar cell panel, comprising the following steps:

S10, positioning the light-transmitting support layer 1;

In this step, the light-transmitting support layer 1 can be positioned manually or automatically. Taking the automatic positioning method as an example, the light-transmitting support layer 1 can be placed on the corresponding frame, and then the frame The frame body should have the ability to position the light-transmitting support layer 1. For example, corresponding grooves can be set on the frame body to reliably position the light-transmitting support layer 1, and the positioning of the frame body The frame should be positioned firmly and not easily dislocated to improve accuracy.

S20, laying the film layer 2 on the light-transmitting support layer 1;

The laying method of the thin film layer 2 refers to the prior art, which will not be repeated here. When laying the thin film layer 2, the cleanliness of the light-transmitting support layer 1 should be ensured to improve the assembly precision of the solar cell module.

S30, laying solar cell sheets 3 on the thin film layer 2, and making the solar cell sheets 3 evenly distributed on the thin film layer 2;

The plurality of solar cells 3 are uniformly distributed on the thin film layer 2 , and can be uniformly distributed in a rectangular array or in other ways. The uniform distribution of the solar cells 3 is not limited.

S40, coating a conductive adhesive on the solar cell sheet 3, and the conductive adhesive covers the electrodes on the solar cell sheet 3;

In this step, the conductive adhesive should cover the electrodes on the solar cell sheet 3, so that the electrodes cooperate with the conductive adhesive to realize current conduction.

S50, laying an insulating layer 4 on the solar cell sheet 3, and setting a through hole on the insulating layer 4, the through hole allows the conductive adhesive to pass through the insulating layer 4;

The through hole in this step allows the conductive adhesive to penetrate through the insulating layer 4 to contact other structures, so as to realize the conduction of current.

S60, the electrode interconnection layer 5 is arranged on the insulating layer 4, and the conductive adhesive passing through the insulating layer 4 is in contact with the electrode interconnection layer 5 and conducts electricity to form a semi-finished product assembly;

The electrode interconnection layer 5 is in contact with the conductive adhesive to form a conductive path.

S70, applying pressure to the semi-finished component after heating the semi-finished component in a vacuum state and maintaining it, and then cooling the semi-finished component to a natural temperature.

As shown in FIG. 1 , the heating and pressurizing parameters of the semi-finished component refer to the prior art, which will not be repeated here. This solution is mainly an assembling method of a solar cell module, and its assembling process is not limited, and the specific parameters such as temperature and pressure refer to the prior art.

Example 2

A method for producing a back-contact solar cell panel, comprising the following steps:

S10, positioning the light-transmitting support layer 1;

S20, laying the film layer 2 on the light-transmitting support layer 1;

S30, laying solar cell sheets 3 on the thin film layer 2, and making the solar cell sheets 3 evenly distributed on the thin film layer 2;

S35, heating the film layer 2 and melting at least a part of the film layer 2, and entering the next step after the film layer 2 to be melted is solidified;

S40, coating a conductive adhesive on the solar cell sheet 3, and the conductive adhesive covers the electrodes on the solar cell sheet 3;

S50, laying an insulating layer 4 on the solar cell sheet 3, and setting a through hole on the insulating layer 4, the through hole allows the conductive adhesive to pass through the insulating layer 4;

S60, the electrode interconnection layer 5 is arranged on the insulating layer 4, and the conductive adhesive passing through the insulating layer 4 is in contact with the electrode interconnection layer 5 and conducts electricity to form a semi-finished product assembly;

S70, applying pressure to the semi-finished component after heating the semi-finished component in a vacuum state and maintaining it, and then cooling the semi-finished component to a natural temperature.

The difference between this embodiment and Embodiment 1 is that S35 heats the thin film layer 2 and melts at least a part of the thin film layer 2. After the film layer 2 to be melted is cured, the conductive adhesive is added. This solution makes the solar cell After the sheet 3 and the light-transmitting support layer 1 are joined, other processes are performed to prevent the dislocation between the solar cell sheet 3 and the light-transmitting support, thereby improving the assembly accuracy of the solar cell panel.

Example 3

In this embodiment, the thin film layer 2 , the heating temperature of the thin film layer 2 and the insulating layer 4 are introduced in combination with the embodiment 1 or the embodiment 2. This embodiment is not intended to limit the above-mentioned method, and is intended to disclose a possible implementation manner. It is understood that those skilled in the art can obtain other implementation manners according to this embodiment.

The thin film layer 2 is heated at a temperature of 50 degrees Celsius to 80 degrees Celsius. The heating temperature of the thin film layer 2 is not specifically limited, and those skilled in the art can freely choose the heating temperature.

The film layer 2 is ethylene vinyl acetate.

The insulating layer 4 is a PET layer, and an ethylene vinyl acetate layer is wrapped around the PET layer.

The specific materials and structures of the thin film layer 2 and the insulating layer 4 are not specifically limited, and can be freely set by those skilled in the art.

For example, those skilled in the art can select the specific materials and structures of the thin film layer 2 and the insulating layer 4 in combination with common knowledge in the art.

Example 4

As shown in FIG. 2 , this embodiment introduces a production equipment for producing solar cell panels based on the method in the above embodiment.

A production equipment for back-contacting solar cell panels, including a rack 6, the rack 6 can be formed by splicing rods or/and plates, the specific structure of the rack 6 is not limited, and those skilled in the art will be based on the working environment of the production equipment. , freely choose the specific structure of the rack 6 .

The rack 6 is provided with an assembly head for assembling the back-contact solar cell panels. The assembly head refers to a mechanism for completing the assembly of the solar cell panels. The assembly structures in each process are in the prior art, and will not be described in detail here. The rack 6 is also provided with a first conveyor, and a support frame driven by the first conveyor and circulating among all the assembly heads is arranged on the first conveyor. A second conveyor is also provided for conveying the support frame after the last assembly process to before the first assembly process.

The first conveyor and the second conveyor may be belt conveyors or roller conveyors, and both the first conveyor and the second conveyor are used for conveying related devices, and the specific structures thereof refer to the prior art.

The rack 6 is provided with a lower rack 7 for transferring the support rack on the first conveyor to the second conveyor, and the rack 6 is also provided with a support rack on the second conveyor Transferred to the rack loader 8 on the first conveyor.

The rack-upper 8 and the rack-downer 7 are used to switch the support frame between the first conveyor and the second conveyor, so as to realize the recycling of the support frame.

The rack 6 is provided with a transfer carrier 15 for removing the back-contact solar cell panels assembled into semi-finished products. The transfer unit 15 is used to move the back-contact solar cell panel assembled into the semi-finished product to the next process. The transfer carrier 15 may be a roller conveyor or a belt conveyor or other structure of specific conveying capability.

The assembly head includes a support layer placer 9 , a thin film layer placer 10 , a heater 11 , a conductive adhesive applicator 12 , an insulating layer placer 13 and an electrode interconnection layer placer 14 .

The support layer placer 9, the film layer placer 10, the heater 11, the conductive adhesive applicator 12, the insulating layer placer 13 and the electrode interconnection layer placer 14 are sequentially arranged on the frame 6, so that the The transfer device 15 is located on the side of the electrode interconnection layer placer 14 away from the insulating layer placer 13 .

Specifically, during the actual operation of this solution, the first conveyor moves the support frame to the corresponding station of the support layer placer 9, and the first conveyor stops. At this time, the support layer placer 9 moves the light-transmitting support layer 1 is placed on the support frame, then the first conveyor works, the support frame and the light-transmitting support layer 1 are moved to the film placer to work, and the first conveyor stops working. At this time, the film placer sets the film on the support On the light-transmitting support layer 1 on the rack, then the first conveyor works to complete the assembly of the solar cell panel in turn. After the last process is completed, the transfer device 15 removes the solar panels assembled into semi-finished products, and the support frame enters the lower frame device 7, and then the lower frame device 7 moves to move the support frame to the second conveyor. The second conveyor works to move the support frame to the front of the first process, and then the support frame is moved to the first conveyor by the rack mounter 8 to realize the recycling of the support frame.

Of course, the number of processes included in the assembly head in this embodiment is not limited. Those skilled in the art can add or subtract some process modules according to corresponding process requirements to change the corresponding process, which is not limited here.

Example 5

In this embodiment, in conjunction with Embodiment 4, the specific structures of the rack mounter 8 and the rack mounter 7 are introduced.

Both the upper rack 8 and the lower rack 7 include a lifter that moves in the vertical direction and a rack shifter arranged on the lifter to transmit the support frame, and a support seat is provided on the lifter , the rack shifter is fixed on the support base. The rack transfer device can be a roller conveyor or a belt conveyor or other devices for realizing material translation.

The lifter includes a driver fixed on the frame 6, the driver can be an air cylinder or a hydraulic cylinder or other components that output linear motion, the driver includes a telescopic component, and the support base is fixed on the telescopic component , the support seat can be fixed on the telescopic part by bolts, and the frame 6 is also provided with a guide rail for guiding the support seat, the guide rail can be fixed on the frame 6 by bolts, on the support seat A guide wheel that cooperates with the guide rail is provided, the guide wheel is arranged on the support seat through a connecting rod, the guide wheel is rotatably connected to the connecting rod through a wheel axle, and the connecting rod is fixed to the connecting rod by bolts. on the support base.

Example 6

This embodiment, combined with Embodiment 4 or Embodiment 5, is an optimized solution to Embodiment 4 or Embodiment 5.

The frame 6 is also provided with a position corrector corresponding to the assembly head one-to-one, that is to say, there should be a corrector at the position of each process, and the corrector is mainly used to correct the position of the support frame , so that the support frame has higher positional accuracy, thereby improving the assembly accuracy of the solar panel.

The position corrector includes a correction frame and a prime mover that drives the correction frame to reciprocate. The prime mover drives the correction frame to support the support frame from bottom to top, and a positioning column is provided on the correction frame. The support frame is provided with a positioning hole matched with the positioning column.

The prime mover can be a cylinder or hydraulic cylinder that outputs linear motion, a linear motor, or other mechanisms that output linear motion. The prime mover drives the calibration frame to move, and makes the calibration frame lift the support frame, and the support frame cooperates with the positioning column and the positioning hole under the action of gravity to correct the position accuracy of the support frame.

There are at least two positioning columns, and one of the positioning columns has an inclined surface that cooperates with the positioning holes to correct the support frame, and the positioning columns are fixed on the correction frame by screws.

The positioning column with inclined surface is truncated, or the positioning column with inclined surface is prismatic, or the positioning column with inclined surface is conical, or the positioning column with inclined surface is pyramid-shaped.

The number of the positioning columns and the specific structures of the positioning columns are not limited, and those skilled in the art can reasonably set them as needed.

In addition, it should be noted that, in the specific embodiments described in this specification, the shapes and names of parts and components thereof may be different. All equivalent or simple changes made according to the structures, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or substitute in similar manners, as long as they do not deviate from the structure of the present invention or go beyond the scope defined by the claims, All should belong to the protection scope of the present invention.

Claims (10)

1. a kind of production method of back contact solar cell plate, it is characterized in that: the following steps are included:

It positions translucency supporting layer (1)；

Film layer (2) are laid on translucency supporting layer (1)；

Solar battery sheet (3) are laid on film layer (2), and solar battery sheet (3) is made to be distributed in the film layer (2) On；

Electroconductive binder is coated on solar battery sheet (3), also, in electroconductive binder covering solar battery sheet (3) Electrode；

Insulating layer (4) are laid on solar battery sheet (3), also, through-hole is set on insulating layer (4), which to lead Electric adhesive passes through insulating layer (4)；

Electrode interconnection layer (5) are set on insulating layer (4), also, pass through the electroconductive binder and electrode interconnection layer of insulating layer (4) (5) contact and conductive, formation semi-finished product module；

Apply pressure to semi-finished product module after vacuum state is to semi-finished product module heating and keeps, it is then that semi-finished product module is cold But to natural temperature.

2. the production method of a kind of back contact solar cell plate according to claim 1, it is characterized in that: in translucency branch It supports before being laid with film layer (2) on layer (1) afterwards and being coated with electroconductive binder on solar battery sheet (3), heating film layer (2) is simultaneously So that film layer (2) is at least melted a part, is coated with electroconductive binder again after film layer (2) solidification wait melt.

3. the production method of a kind of back contact solar cell plate according to claim 2, it is characterized in that: Celsius using 50 It spends to 80 degrees Celsius of temperature and heats the film layer (2).

4. the production method of a kind of back contact solar cell plate according to claim 1, it is characterized in that: the film layer It (2) is ethylene vinyl acetate.

5. the production method of a kind of back contact solar cell plate according to claim 1 or 4, it is characterized in that: described exhausted Edge layer (4) is pet layer, is wrapped with ethylene vinyl acetate layer in the pet layer.

6. a kind of production equipment of back contact solar cell plate, including rack (6), it is characterized in that: being provided on rack (6) The assembling head of back contact solar cell plate is assembled, is additionally provided with the first conveyer on the rack (6), in first transmission It is provided with the support frame for being driven and being circulated between all assembling heads by first conveyer on device, is gone back on the rack (6) It is provided with for support frame to be sent to the second conveyer before first of assembling procedure after last one of assembling procedure, in institute The undercarriage device (7) for being provided with and being sent to the support frame on the first conveyer on the second conveyer on rack (6) is stated, in the machine Be additionally provided with the restocking device (8) support frame on the second conveyer being sent on first conveyer, the machine on frame (6) The shift loader (15) that the back contact solar cell plate for that will be assembled into semi-finished product removes is provided on frame (6).

7. the production equipment of a kind of back contact solar cell plate according to claim 6, it is characterized in that: the assembling head Including supporting layer placer (9), film layer placer (10), heater (11), electroconductive binder are coated with device (12), insulating layer is put Set device (13) and electrode interconnection layer placer (14).

8. the production equipment of a kind of back contact solar cell plate according to claim 7, it is characterized in that: the supporting layer Placer (9), film layer placer (10), heater (11), electroconductive binder be coated with device (12), insulating layer placer (13) and Electrode interconnection layer placer (14) is set in turn on the rack (6), and the shift loader (15) is located at the electrode interconnection layer Side of the placer (14) far from the insulating layer placer (13).

9. the production equipment of a kind of back contact solar cell plate according to claim 7, it is characterized in that: the restocking device (8) include the lifter that moves along the vertical direction and be set on the lifter and transmit the branch with the undercarriage device (7) The moving device of support, is provided with support base on the lifter, and the moving device is fixed on the support base.

10. the production equipment of a kind of back contact solar cell plate according to claim 9, it is characterized in that: the lifting Device includes the driver being fixed on the rack (6), and the driver includes extensible member, and the support base is fixed on described On extensible member, it is additionally provided with the guide rail to support base guiding on the rack (6), is provided on the support base With the directive wheel of guide rail cooperation, the directive wheel is set on the support base by connecting rod, and the directive wheel passes through Wheel shaft is rotationally connected in the connecting rod, and the connecting rod is fixed by bolts on the support base.