Photovoltaic welding machine lamp box and photovoltaic welding machine system

Abstract

The utility model provides a photovoltaic welding machine lamp box and a photovoltaic welding machine system, relates to the technical field of photovoltaics, and aims to solve the technical problem of poor welding products caused by fan abnormity of the photovoltaic welding machine lamp box. The photovoltaic welding machine lamp box comprises a cover plate, at least one fan and at least one gas blowing mechanism, the at least one fan is arranged on the outer side of the cover plate, and the fan is used for heat dissipation of the inner side of the cover plate; the air blowing mechanisms are located on the sides, away from the cover plate, of the corresponding fans, air blowing openings of the air blowing mechanisms are opposite to the surfaces of fan blades of the corresponding fans, and the air blowing mechanisms are used for pushing the corresponding fans to operate. According to the light box of the photovoltaic welding machine, the air blowing mechanism blows the external force of the fan blades, even if the fan is damaged, the fan blades can operate normally, the temperature in the light box of the photovoltaic welding machine is kept, and the welding quality of photovoltaic cells is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and in particular to a photovoltaic welding machine light box and a photovoltaic welding machine system. Background Art

[0002] The statements in this section merely provide background technology related to the present invention and do not necessarily constitute prior art.

[0003] The photovoltaic welding machine light box uses a heating lamp assembly to illuminate the soldering ribbon on the cell, and uses heat energy to melt the soldering ribbon and weld it to the cell. The quality of welding directly affects the quality of photovoltaic cell components. During the welding process, the long-term operation of the welding machine light box gradually increases the temperature inside the welding machine light box, and the temperature uniformity and stability are poor.

[0004] In the related art, the photovoltaic welding machine light box uses a fan to control the temperature and uniformity inside the photovoltaic welding machine light box. During the long-term operation of the photovoltaic welding machine light box, the fan will inevitably fail. At this time, the abnormal temperature inside the photovoltaic welding machine light box will cause abnormal quality of the battery cell welding, affecting the production efficiency of the entire production line. Utility Model Content

[0005] The utility model aims to provide a photovoltaic welding machine light box and a photovoltaic welding machine system to solve the technical problem of poor welding products caused by abnormal fan of the photovoltaic welding machine light box.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] In a first aspect, the utility model provides a photovoltaic welding machine light box, comprising a cover plate, at least one fan and at least one gas blowing mechanism, wherein the at least one fan is arranged on the outside of the cover plate, and the fan is used for heat dissipation on the inside of the cover plate;

[0008] The gas blowing mechanism is located on the side of the corresponding fan away from the cover plate, the blowing port of the gas blowing mechanism is opposite to the surface of the fan blade of the corresponding fan, and the gas blowing mechanism is used to drive the corresponding fan to operate.

[0009] According to at least one embodiment of the present utility model, a first preset angle is defined between a central axis of the air blowing port and an outer side surface of the cover plate, and the first preset angle is 30° to 60°.

[0010] According to at least one embodiment of the utility model, the gas blowing mechanism includes a support and a nozzle, and the housing of the fan has an end plate facing away from the cover plate;

[0011] The support has a connecting portion and a mounting portion along a direction away from the end plate, one end of the connecting portion is connected to the end plate, and the other end is connected to the mounting portion, and the nozzle is arranged on the mounting portion;

[0012] A second preset angle is formed between the mounting portion and the end plate.

[0013] According to at least one embodiment of the present utility model, a plurality of the gas blowing mechanisms are distributed on a side of each fan facing away from the cover plate, and the plurality of the gas blowing mechanisms are evenly distributed along the circumference of the fan.

[0014] According to at least one embodiment of the present utility model, the photovoltaic welding machine light box also includes a partition located on the inner side of the cover plate, a preset distance is provided between the partition plate and the cover plate, and a buffer space for heat insulation is formed between the partition plate and the cover plate.

[0015] According to at least one embodiment of the present utility model, the photovoltaic welding machine light box also includes a plurality of side panels connecting the partition and the cover plate, the side panels are located at the peripheral edge of the partition, and the partition, the cover plate and the plurality of side panels enclose the buffer space.

[0016] According to at least one embodiment of the present utility model, the photovoltaic welding machine light box further comprises a reflective plate located on the side of the partition away from the cover plate, and the reflective plate is used to reduce the heat from baking the fan.

[0017] According to at least one embodiment of the present utility model, the partition plate and the reflective plate are both plates with a hollow structure.

[0018] According to at least one embodiment of the present utility model, the cover plate, the partition plate and the reflector plate are provided with long strip-shaped through holes at corresponding positions for the detection unit to pass through, and the detection unit is used to detect the environment inside the photovoltaic welding machine light box;

[0019] At least one baffle plate is detachably connected to the outer side of the cover plate, and the at least one baffle plate covers at least a part of the corresponding through hole.

[0020] In a second aspect, the utility model provides a photovoltaic welding machine system, including a gas supply device, a conveying device, and a photovoltaic welding machine light box as described in any one of the first aspects;

[0021] The gas supply device is used to deliver high-pressure gas to the gas blowing mechanism, and the conveying device is used to convey the photovoltaic cells to be welded into the photovoltaic welding machine light box.

[0022] One or more technical solutions provided in the exemplary embodiments of the present utility model can achieve at least one of the following beneficial effects.

[0023] The photovoltaic welding machine light box of the exemplary embodiment of the utility model includes a cover plate, at least one fan arranged on the outside of the cover plate for heat dissipation on the inside of the cover plate, and a gas blowing mechanism is arranged at a corresponding position of the fan, and the air blowing port of the gas blowing mechanism is opposite to the fan blades, so that the fan can rotate when the gas blows the fan blades. Based on this, even if the fan is damaged by being baked due to the high temperature inside the photovoltaic welding machine light box, and the fan itself fails and cannot achieve heat uniformity, which will cause poor welding of the photovoltaic cell, the external force of the gas blowing mechanism blowing the fan blades can also achieve the rotation of the fan blades, thereby maintaining the temperature uniformity inside the photovoltaic welding machine light box, ensuring the welding quality of the photovoltaic cell, and thus improving the production efficiency of the photovoltaic cell production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings illustrate exemplary embodiments of the present invention and are used to explain the principles of the present invention together with the description thereof, wherein these drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification;

[0025] Figure 1 It is a schematic diagram of the structure of a photovoltaic welding machine light box according to an embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the buffer space structure of the photovoltaic welding machine light box according to the embodiment of the utility model;

[0027] Figure 3 This is a schematic structural diagram of a photovoltaic welding machine light box from another perspective according to an embodiment of the utility model;

[0028] Figure 4 yes Figure 3 Schematic diagram of the decomposition structure.

[0029] Figure numerals: 10, gas blowing mechanism; 11, connecting part; 12, mounting part; 13, nozzle; 21, end plate; 22, fan blade; 31, cover plate; 32, partition plate; 33, side plate; 34, buffer space; 35, baffle; 36, shading plate; 37, reflector; 40, through hole. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] The photovoltaic welding machine light box runs for a long time during the welding process, which will gradually increase the temperature inside the photovoltaic welding machine light box, and the temperature uniformity and stability are poor. Generally, a fan is used to control the temperature and uniformity in the photovoltaic welding machine light box.

[0032] In the related art, an aluminum plate is set between the heating lamp assembly and the fan of the photovoltaic welding machine light box for isolation. When the photovoltaic welding machine light box is running for a long time, heat will penetrate the middle aluminum plate, which will cause the fan in contact with the aluminum plate to burn out and stop rotating. The photovoltaic welding machine light box will overheat and the photovoltaic cells will be over-welded, making the quality of photovoltaic products abnormal.

[0033] In response to the above problems, the photovoltaic welding machine light box provided by the exemplary embodiment of the utility model is provided with a gas blowing mechanism toward the fan blades at the fan position. Even if the fan fails due to high temperature baking or there is no electricity, the fan blades can rotate normally by blowing the gas, thereby achieving uniform temperature and heat dissipation inside the photovoltaic welding machine light box, and ensuring the welding quality of the photovoltaic cells in the photovoltaic welding machine light box.

[0034] Figure 1 This is a schematic diagram of the photovoltaic welding machine light box structure according to the embodiment of the utility model. Figure 1 As shown, the photovoltaic welding machine light box provided by the exemplary embodiment of the utility model includes a cover plate 31, at least one fan and at least one gas blowing mechanism 10, at least one fan is arranged on the outside of the cover plate 31, and the gas blowing mechanism 10 is located on the side of the corresponding fan away from the cover plate 31; the fan is used for heat dissipation on the inner side of the cover plate 31; the air outlet of the gas blowing mechanism 10 is opposite to the surface of the fan blade 22 of the corresponding fan, and the gas blowing mechanism 10 is used to drive the corresponding fan to operate.

[0035] In actual applications, the inner side of the cover 31 in the photovoltaic welding machine light box is the interior of the welding machine light box body, in which a heating lamp assembly is arranged to generate high temperature for welding the battery cells and welding strips. By arranging one or more fans, for example, two fans, on the outer side of the cover 31 and supplying air to the interior through the operation of the fans, the heat on the inner side of the cover 31, that is, the body of the photovoltaic welding machine light box, can be evenly dispersed, thereby preventing the local temperature of the battery cells and welding strips from being too high, causing over-welding and producing defects. During the long-term welding process of the photovoltaic welding machine light box, the high temperature generated on the inner side of the cover plate 31 in the photovoltaic welding machine light box will damage the fan baking. When the fan cannot operate normally, the gas blowing mechanism 10 arranged on the side of the fan away from the cover plate 31 blows out air or other gas with a certain pressure, such as nitrogen, through the blowing port opposite to the surface of the fan blade 22. Under the action of external force, the fan blade 22 will operate as when the fan is normal. As long as the fan blade can rotate, the normal heat dissipation function of the fan blade 22 can be guaranteed, and the heat in the photovoltaic welding machine light box can be uniform, and the battery cell welding will not produce defects, thereby realizing the continuous operation of the production line and improving production efficiency. It should be understood that in order to dissipate the heat on the inner side of the cover plate 31, the cover plate 31 is provided with a vent at the corresponding position of the fan so that the wind of the fan can enter the box body of the photovoltaic welding machine light box. It should be noted that the fan blades 22 are curved surfaces with a certain curvature, wherein the air outlet of the gas blowing mechanism 10 is opposite to the surface of the blades 22 of the corresponding fan, that is, the direction of the air outlet is roughly the same as the rotation direction of the blades 22.

[0036] For example, there is a first preset angle between the central axis of the air outlet and the outer side of the cover plate 31, and the first preset angle is 30° to 60°. Exemplarily, the first preset angle is 40° to 50°, and optionally the first preset angle is 45°, that is, the central axis direction of the air outlet can be the normal direction of the curved surface of the fan blade 22.

[0037] In order to achieve a first preset angle between the central axis of the blowing port and the outer side surface of the cover plate 31 , the gas blowing mechanism 10 may be arranged in a variety of ways.

[0038] For example, a gas delivery pipe can be suspended by a bracket on the side of the fan away from the cover plate 31. The gas blowing mechanism 10 can also be arranged on the fan, so as to make the structure more compact and achieve the effect of small space occupation area.

[0039] For example, if Figure 1As shown, the gas blowing mechanism 10 includes a support and a nozzle 13, the fan housing has an end plate 21 facing away from the cover plate 31; the support has a connecting portion 11 and a mounting portion 12 along a direction away from the end plate 21, one end of the connecting portion 11 is connected to the end plate 21, and the other end is connected to the mounting portion 12, and the nozzle 13 is arranged on the mounting portion 12; a second preset angle is provided between the mounting portion 12 and the end plate 21.

[0040] In the connection part 11 and the mounting part 12 of the above-mentioned support, the connection part 11 is fixed to the end plate 21 of the fan by bolts, and has a certain height, so that the mounting part 12 arranged on the connection part 11 can have a certain inclined surface, and the inclination angle between the mounting part 12 and the end plate 21 is a second preset angle, so that when the nozzle 13 is installed on the mounting part 12, the central axis of the nozzle 13 blowing port can have a first preset angle with the end plate 21, that is, the central axis of the blowing port of the nozzle 13 and the outer side surface of the cover plate 31 form a first preset angle. For example, when the central axis of the nozzle 13 is perpendicular to the inclined surface of the mounting part 12, and the first preset angle between the blowing port of the nozzle 13 and the outer side surface of the cover plate 31 is 30°, the second preset angle of the inclination angle between the mounting part 12 and the end plate 21 is 60°. Exemplarily, the sum of the first preset angle and the second preset angle is 90°. Exemplarily, the above-mentioned nozzle 13 can be a circular tubular nozzle, or a nozzle of other shapes.

[0041] In order to ensure that the fan can operate reliably and play a role in heat dissipation and temperature uniformity in the event of power failure or failure, a plurality of gas blowing mechanisms 10 are distributed on the side of each fan away from the cover plate 31, and the plurality of gas blowing mechanisms 10 are evenly distributed along the circumference of the fan. Figure 1 As shown, two gas blowing mechanisms 10 are arranged on each fan, the two gas blowing mechanisms 10 are distributed at 180 degrees, and the two gas blowing mechanisms 10 are respectively arranged at the corner positions of the end plate 21, and the corner positions themselves have screw holes or through holes. Therefore, the arrangement at the corner positions of the end plate 21 can make full use of the inherent structure of the end plate 21 of the fan, and the gas blowing mechanism 10 can be disassembled and connected by bolts, without the need to modify the fan of the existing photovoltaic welding machine light box, thereby saving modification costs and maintenance costs.

[0042] Exemplarily, the gas blowing mechanism 10 can be automatically started by a controller when a fan fails, or the fan blades 22 can be designed so that the fan is not operated by a motor, but directly operated by the external force of the compressed air of the gas blowing mechanism 10, so that there is always wind blowing into the interior of the photovoltaic welding machine light box for uniform heat dissipation, thereby improving the trouble-free time of the photovoltaic welding machine light box and ensuring the welding quality of the battery cells.

[0043] Figure 2Schematic diagram of the buffer space structure of the photovoltaic welding machine light box according to the embodiment of the utility model. Figure 2 As shown, the photovoltaic welding machine light box of the exemplary embodiment of the utility model further includes a partition 32 located on the inner side of the cover plate 31 , with a preset distance between the partition 32 and the cover plate 31 , forming a buffer space 34 for heat insulation between the partition 32 and the cover plate 31 .

[0044] Compared with the prior art, in which an aluminum plate is placed between the fan and the box body for heat insulation, heat can easily penetrate the aluminum plate, causing the fan to be damaged by prolonged high temperature. The exemplary embodiment of the utility model sets a certain preset distance between the partition 32 and the cover plate 31, and forms a heat buffer space 34 between the partition 32 and the cover plate 31. The setting of the buffer space 34 can prevent heat from easily penetrating the cover plate 31 to reach the fan, thereby extending the trouble-free time of the fan and ensuring the welding quality of the photovoltaic welding machine light box.

[0045] Furthermore, in order to maintain the buffering effect of the buffer space 34, the buffer space 34 is designed to be a space with a certain degree of closure. Figure 2 As shown, the photovoltaic welding machine light box also includes a plurality of side panels 33 connecting the partition 32 and the cover plate 31, and the side panels 33 are located at the peripheral edge of the partition 32. The partition 32, the cover plate 31 and the plurality of side panels 33 enclose a buffer space 34. When the buffer space 34 is a rectangular parallelepiped, the number of the side panels 33 is four, and the four side panels 33 respectively enclose the four side gaps of the buffer space 34 formed by the partition 32 and the cover plate 31, thereby forming a relatively closed rectangular parallelepiped buffer space 34. At the same time, the four side panels 33 can also fix the partition 32 to the cover plate 31, playing a certain connecting role.

[0046] Figure 3 This is a schematic structural diagram of a photovoltaic welding machine light box from another perspective according to an embodiment of the utility model; Figure 4 yes Figure 3 Schematic diagram of the decomposition structure. Figure 3 and Figure 4As shown, the photovoltaic welding machine light box of the exemplary embodiment of the utility model also includes a reflector 37 located on the side of the partition 32 away from the cover plate 31, and the reflector 37 is used to reduce the heat baking the fan. The reflector 37 can reflect the heat emitted by the light assembly back to the welding space of the photovoltaic welding machine light box, thereby minimizing the heat radiation to the cover plate 31 and the fan, further reducing the baking damage to the fan caused by high temperature, ensuring the uniformity of the heat inside the photovoltaic welding machine light box, and improving the reliability of welding quality. Exemplarily, the reflector 37 can be fitted on the side of the partition 32 away from the cover plate 31, or it can be connected to the partition 32 or other components at a certain distance from the partition 32. When the reflector 37 is set at a certain distance from the partition 32, the space between the two forms a buffering effect like the buffer space 34, thereby minimizing the possibility of heat reaching the fan.

[0047] like Figure 4 As shown, the partition 32 and the reflector 37 are both plates with hollow structures. For example, the partition 32 has a plurality of long strip or waist-shaped hollow structures, and the reflector 37 has a plurality of circular hollow structures. Through the hollow structures evenly distributed on the partition 32 and the reflector 37, the wind from the fan can enter the photovoltaic welding machine light box evenly, so that the uniformity of heat inside the welding space is guaranteed, thereby achieving reliable welding quality of the battery cells, reducing defects, and thus improving the production efficiency of the production line. It should be noted that the partition 32 can also be provided with a plurality of circular hollow structures, and the reflector 37 reduces the heat reaching the fan through reflection, so it is necessary to ensure a certain reflection area, and a plurality of circular hollow structures are used.

[0048] Considering the need to monitor the environment inside the photovoltaic welding machine light box to obtain a good solar cell welding effect, for example, a temperature sensor is used to detect the temperature and temperature uniformity inside the photovoltaic welding machine light box. Figure 3 and Figure 4 As shown, in the photovoltaic welding machine light box of the exemplary embodiment of the utility model, the cover plate 31, the partition plate 32 and the reflector plate 37 are all provided with long strip-shaped through holes 40 for the detection part to pass through at corresponding positions, and the detection part is used to detect the environment inside the photovoltaic welding machine light box; the outer side of the cover plate 31 is also detachably connected with at least one baffle plate 35, and at least one baffle plate 35 covers at least a part of the corresponding through hole 40.

[0049] When the cover plate 31, the partition plate 32 and the reflector plate 37 are all provided with a long through hole 40, the through holes 40 of the three form a connected space for the corresponding detection part, such as a temperature sensor, to penetrate into the interior of the photovoltaic welding machine light box. Since the installation position of the temperature sensor needs to be changed, the length of the through hole 40 is greater than the temperature sensor. When the temperature sensor is installed to the through hole 40 of the cover plate 31, in order to ensure that heat does not dissipate from the uninstalled area of ​​the through hole 40 and to ensure that the ambient temperature inside the box is within a certain range, two baffles 35 are detachably connected to the outer side of the cover plate 31. The two baffles 35 are covered on the through hole 40 of the cover plate 31. According to the uninstalled area of ​​the through hole 40 of the cover plate 31, the corresponding baffle 35 can be covered to the uninstalled area, so that the box of the photovoltaic welding machine light box forms a relatively closed welding space to prevent heat loss.

[0050] An exemplary embodiment of the utility model also provides a photovoltaic welding machine system, including a gas supply device, a conveying device and a photovoltaic welding machine light box in any of the above-mentioned embodiments; the gas supply device is used to deliver high-pressure gas to the gas blowing mechanism 10, and the conveying device is used to convey the photovoltaic cells to be welded into the photovoltaic welding machine light box.

[0051] In some embodiments, the above-mentioned conveying device is a conveying line or a conveyor belt, and the photovoltaic welding machine light box is also provided with a shading plate 36 at the position on both sides of the conveying line. The two shading plates 36 are respectively connected to the cover plate 31 and are arranged on the outside of the corresponding side plate 33. That is, the two shading plates 36, the battery cells on the conveying line and the cover plate 31 form a relatively closed welding space in the photovoltaic welding machine light box. The conveying line transports the battery cells or battery strings and the welding belts to the welding space. The heat of the heating lamp assembly arranged in the welding space makes the welding belts welded on the battery cells. The two shading plates 36 can reduce the heat loss inside the box body and keep the temperature inside the box body within a certain welding temperature range. Exemplarily, the above-mentioned air supply device can be an air compressor, an air pump, etc., which can be connected to each nozzle 13 to provide high-pressure air, nitrogen, etc. to each nozzle 13. Exemplarily, a regulating valve can also be provided on the pipeline between the air supply device and the nozzle 13, and then the air flow rate can be controlled by the regulating valve, so that the fan blades 22 of the fan maintain a certain speed and maintain the temperature inside the box body.

[0052] Compared with the prior art, the advantages of the photovoltaic welding machine system of the exemplary embodiment of the utility model are the same as those of the above-mentioned photovoltaic welding machine light box, which will not be repeated here.

[0053] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A photovoltaic welding machine light box, characterized in that: It includes a cover plate, at least one fan and at least one gas blowing mechanism, wherein the at least one fan is arranged on the outside of the cover plate, and the fan is used for heat dissipation on the inside of the cover plate; The gas blowing mechanism is located on the side of the corresponding fan away from the cover plate, the blowing port of the gas blowing mechanism is opposite to the surface of the fan blade of the corresponding fan, and the gas blowing mechanism is used to drive the corresponding fan to operate.

2. The photovoltaic welding machine light box according to claim 1, characterized in that: A first preset angle is formed between the central axis of the air blowing port and the outer side surface of the cover plate, and the first preset angle is 30° to 60°.

3. The photovoltaic welding machine light box according to claim 2, characterized in that: The gas blowing mechanism comprises a support and a nozzle, and the housing of the fan has an end plate facing away from the cover plate; The support has a connecting portion and a mounting portion along a direction away from the end plate, one end of the connecting portion is connected to the end plate, and the other end is connected to the mounting portion, and the nozzle is arranged on the mounting portion; A second preset angle is formed between the mounting portion and the end plate.

4. The photovoltaic welding machine light box according to any one of claims 1 to 3, characterized in that: A plurality of the gas blowing mechanisms are distributed on a side of each fan away from the cover plate, and the plurality of the gas blowing mechanisms are evenly distributed along the circumference of the fan.

5. The photovoltaic welding machine light box according to any one of claims 1 to 3, characterized in that: The photovoltaic welding machine light box also includes a partition located on the inner side of the cover plate, a preset distance is provided between the partition plate and the cover plate, and a buffer space for heat insulation is formed between the partition plate and the cover plate.

6. The photovoltaic welding machine light box according to claim 5, characterized in that: The photovoltaic welding machine light box also includes a plurality of side panels connecting the partition and the cover plate, the side panels are located at the peripheral edge of the partition, and the partition, the cover plate and the plurality of side panels enclose the buffer space.

7. The photovoltaic welding machine light box according to claim 5, characterized in that: The photovoltaic welding machine light box also includes a reflector located on the side of the partition away from the cover plate, and the reflector is used to reduce the heat from baking the fan.

8. The photovoltaic welding machine light box according to claim 7, characterized in that: The partition plate and the reflective plate are both plates with a hollow structure.

9. The photovoltaic welding machine light box according to claim 7, characterized in that: The cover plate, the partition plate and the reflector plate are provided with long strip-shaped through holes at corresponding positions for the detection unit to pass through, and the detection unit is used to detect the environment inside the photovoltaic welding machine light box; At least one baffle plate is detachably connected to the outer side of the cover plate, and the at least one baffle plate covers at least a portion of the corresponding through hole.

10. A photovoltaic welding system, characterized in that: It comprises a gas supply device, a conveying device and a photovoltaic welding machine light box as described in any one of claims 1 to 9; The gas supply device is used to deliver high-pressure gas to the gas blowing mechanism, and the conveying device is used to convey the photovoltaic cells to be welded into the photovoltaic welding machine light box.

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