CN102699587A - Single welding and series welding integrity device of solar cell slices - Google Patents

Abstract

The technical purpose of the single-welding and string-welding integrated equipment for solar cells of the present invention is to provide a solar cell with good positioning accuracy, improved production efficiency in single-welding and string-welding of solar cells, and compatible with solar cells of different specifications Chip single welding and serial welding integrated equipment. It includes an equipment frame, and the equipment frame is equipped with: a feeding mechanism, a transmission and positioning mechanism, a welding and temperature control mechanism, a material unloading mechanism, a control mechanism, a power supply and a control mechanism. The invention changes the fully manual welding mode into a fully automatic mechanical welding mode, greatly improves the production efficiency, reduces the bad chip rate in the welding process, and is suitable for application in solar cell battery chip welding.

Description

Single welding and series welding integrated equipment for solar cells

the

technical field

The present invention relates to a welding equipment for solar cells, more specifically, an integrated equipment for single welding and series welding of solar cells.

Background technique

With the development of social economy and the improvement of people's living standards, people's demand for energy continues to increase. With the shortage of non-renewable energy such as coal, oil, and natural gas, the energy problem has become the primary problem restricting the economic development of various countries. Driven by the international photovoltaic market and the policy support of governments around the world, the photovoltaic manufacturing industry is booming. my country's solar cell and module manufacturing industry is also advancing at an alarming rate. The complete photovoltaic manufacturing industry chain is: silicon material —> crystal pulling, ingot casting —> raw silicon wafer —> cleaning, diffusion, etching, PE, screen printing, sintering —> solar cells —> sorting, single welding , series welding, stacking, lamination, testing, framing —> solar modules —> mounting brackets, modules in series, modules in parallel, inverter control —> solar power generation system. Among them, the production of photovoltaic modules plays a vital role in the entire photovoltaic industry chain. In the production process of photovoltaic modules, the single welding and series welding process is a very important and indispensable process. It plays a vital role in the production efficiency of the entire module production, the appearance of the finished module and the photoelectric conversion efficiency. For non-standard components after slicing, there is no standard production mode for traditional single welding and series welding, and it is basically a fully manual mode. Because the length and width of the slices vary with the needs of customers, generally, the drawings are first drawn and then pasted on the worktable for single welding, and the string welding personnel arrange and weld the batteries according to the drawing model. Such a full manual production mode is very random, human factors have a great influence on the production effect, and the production fragmentation rate is high. Drawings are required for each width of cell, and the number of times the drawings are used is limited, and the repetitive work of designers reduces the utilization rate of technology. The positioning accuracy of stringing operators on the drawings is poor, and it takes a long time, which makes it difficult to unify the cells after stringing and affects the subsequent stacking process.

Contents of the invention

The technical purpose of the present invention is to overcome the technical problems of high fragmentation rate and low work efficiency of the single welding and series welding equipment of solar cells in the prior art; to provide a kind of positioning accuracy, which improves the single welding and series welding of solar cells. The production efficiency is high, and it is compatible with the single welding and series welding of solar cells of different specifications.

For realizing above technical purpose, technical scheme of the present invention is:

The integrated equipment for single welding and series welding of solar cells includes an equipment rack, and the equipment rack is equipped with:

A feeding mechanism, the feeding mechanism includes a feeding mechanism feeding conveyor belt, a feeding suction cup is arranged above the feeding conveyor belt, and a cell integrity detection platform is also arranged on the equipment frame;

Transmission and positioning mechanism, the transmission and positioning mechanism includes a conveyor belt, a transmission servo motor for driving the conveyor belt, and a position sensor;

 Welding and temperature control mechanism, the welding and temperature control mechanism includes ribbon supply equipment, flux supply equipment, ribbon cutting knife, heating plate;

  The unloading mechanism, the unloading mechanism includes a conveyor belt, a suction cup, a motor, and a detection sensor;

The control mechanism, the control mechanism includes a computer, and the computer is connected with a PLC intelligent control unit;

Power supply and control mechanism, power supply and control mechanism includes vacuum pump, fan, compressed air control circuit and power circuit.

Furthermore, the unloading mechanism is provided with a unloading table, and the unloading table is provided with a semicircular glass protective cover.

Further, there are 12 suction cups of the unloading mechanism.

The beneficial technical effects of the present invention are: targeted improvements are made to various actions in the process of single welding and serial welding, so that random manual operations are changed into fully automatic mechanical standard actions. From loading to the end of string welding, the intermediate process does not require manual participation. Practice has proved that the present invention can effectively solve the above series of problems. Compared with the traditional full manual drawing mode, it has many advantages such as high efficiency, high reliability, high automation, high cost performance, and low fragmentation rate. Change the fully manual welding mode to the fully automatic mechanical welding mode, which greatly improves the production efficiency, and the welding time required for each string is controlled within 1 minute. Greatly reduce the number of personnel used for single welding and string welding, saving labor costs. Precise control of the length of the welding strip, reducing material waste and processing costs. There is no need for technicians to design drawings repeatedly, which improves the utilization rate of technology, reduces the labor load of technicians, and saves the cost of drawings. The precise positioning mechanism makes the welding effect consistent, and the finished components are beautiful and uniform. The welding process does not require manual participation, and the moving components of the intermediate conveyor belt are stable, which greatly reduces the scrapping during the stringing process, and the overall welding scrapping rate is controlled within 1‰. The welded structure controls the temperature accurately, and the welded cells have high reliability. The control program of the invention is simple to operate, has a visualized user interface, and greatly shortens the training cycle of employees. The invention can flexibly set specification parameters of various structures, so as to achieve flexible application and uniform standards. The appearance of the battery string made by the automatic welding machine is uniform, which can greatly shorten the inspection and adjustment time of the subsequent lamination work. The invention adds an intermediate cooling air supply port, which greatly shortens the cooling time of the battery string.

The invention has a perfect protection function for the cell strings in the whole welding process, and reduces the bad chip rate in the welding process.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the present invention.

Detailed ways

In conjunction with Figure 1, the specific implementation of the present invention will be described in detail, but the claims are not limited in any way.

In the structure of the single-welding and series-welding integrated equipment of the solar cells of the present invention, an equipment frame 100 is included, and the equipment frame is provided with: a feeding mechanism, and the feeding mechanism includes a feeding mechanism for feeding materials. Conveyor belt 102, a feeding suction cup 101 is provided above the feeding conveyor belt 102, and a cell integrity detection platform 103 is also provided on the equipment frame 100; a transmission and positioning mechanism, the transmission and positioning mechanism includes a conveyor belt 200 for Drive the transmission servo motor and position sensor of the conveyor belt; the welding and temperature control mechanism, the welding and temperature control mechanism includes a welding ribbon supply device 300, a flux supply equipment, a welding ribbon cutting knife, and a heating plate; a blanking mechanism, the The blanking mechanism includes a conveyor belt 400, a suction cup 401, a motor, and a detection sensor; a control mechanism, which includes a computer 500 connected to a computer monitoring screen 501 connected to a PLC intelligent control unit 600; power supply and control mechanism, The power supply and control mechanism includes a vacuum pump 700, a fan 800, a compressed air control circuit and a power circuit. The blanking mechanism is provided with a blanking platform, and the blanking platform is provided with a semicircular glass protective cover.

During implementation, workers only need to place the sorted cells on the loading platform, and the suction cup 101 of the feeding mechanism will automatically suck the cells to be welded to the cell integrity testing platform 103 for testing. Then suck it to the fixed position of the single welding series welding platform, the welding and temperature control mechanism will automatically lay the solder ribbon soaked in flux on the battery sheet, and the control mechanism controls the length of the solder ribbon. Then it is transmitted to the welding and temperature control mechanism by the transmission and positioning mechanism for welding. The temperature controller 900 or the control mechanism automatically controls the temperature of the heating plate to 340°C-360°C. The number of welded cells is automatically monitored by the control mechanism. At the same time, the conveyor belt 102 transports the welded cells to the feeding mechanism. When the set number of welding strings is reached, the conveyor belt 200 of the transmission and positioning mechanism automatically transfers the entire string of welded cells to the discharging mechanism. The 12 suction cups of the unloading mechanism suck up the entire string of cells at the same time, and first place them on a row of cell integrity testing platforms composed of 12 sensors for detection and counting. After the entire string of cells is qualified, the worker confirms After the welding effect, the whole string of battery slices is automatically sucked into the blanking box. When the number of battery strings in the blanking box reaches the number set by the control system after welding, the control system will automatically alarm and prompt that the complete set of batteries Take out the slices.

The control mechanism of the present invention is an intelligent control system, which automatically alarms and monitors, and has a memory function. After the alarm is released, it continues to operate according to the memory point. The feeding mechanism of the present invention can automatically suck the slices, has the function of monitoring the integrity of the battery slices, and automatically alarms when there are broken pieces. piece. The welding ribbon supply device 300 of the present invention can precisely control the length of the welding ribbon, and has the functions of automatic cutting and automatic flux addition. The electromagnetic welding head of the welding and temperature control mechanism of the present invention can precisely control the temperature, and the unevenness of the welding head can be controlled within 100um to achieve the best welding effect. The transmission and positioning mechanism of the invention can precisely position the transmission, and the error distance is controlled within 200 μm. The 12 infrared sensors of the feeding mechanism of the present invention can detect the integrity of the whole string of battery slices, and can automatically alarm if there are fragments. The inspection of the welding effect can be confirmed by the operator, or it can be put into the blanking box directly after a default pause of 5S. In the control mechanism of the present invention, the software control program and the PLC control program used are specially made for this equipment, which is the guarantee for realizing full automation, high precision and high reliability of single welding and series welding. The present invention has an intermediate cooling air supply port 801, which greatly shortens the cooling time. The shape design of the feeding platform of the present invention is more convenient, operable and beautiful. The blanking mechanism of the present invention is provided with a blanking table, and the semicircular glass protective cover of the blanking table is more conducive to protecting the safety of the finished battery string and the sanitation of the blanking table.

Claims (3)

1. the single of solar battery sheet welds and the series welding equipment integrating, and it is characterized in that: include equipment rack, said equipment rack is provided with:

Feed mechanism, said feed mechanism include feed mechanism material loading conveyer belt, and material loading conveyer belt top is provided with the material loading sucker, on equipment rack, also is provided with battery sheet integrity detection platform;

Transmission and detent mechanism, said transmission and detent mechanism include conveyer belt, drive transmission servomotor, the position sensor of conveyer belt;

Welding and temperature control mechanism, said welding and temperature control mechanism include welding supply arrangement, scaling powder supply arrangement, welding draw cut cutter, heating plate;

Cutting agency, said cutting agency includes conveyer belt, sucker, motor, detecting sensor;

Controlling organization, said controlling organization comprises computer, computer is connected with the PLC intelligent control unit;

Power provides and controlling organization, and power provides and controlling organization comprises vavuum pump, blower fan, compressed air control circuit and power circuit.

2. the single of solar battery sheet according to claim 1 welds and the series welding equipment integrating, and it is characterized in that: said cutting agency is provided with blanking bench, and said blanking bench is provided with semicircle protecting glass.

3. the single of solar battery sheet according to claim 1 and 2 welds and the series welding equipment integrating, and it is characterized in that: the sucker of said cutting agency is 12.

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