CN217889794U - Novel infrared focusing device - Google Patents
Novel infrared focusing device Download PDFInfo
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- CN217889794U CN217889794U CN202221257784.2U CN202221257784U CN217889794U CN 217889794 U CN217889794 U CN 217889794U CN 202221257784 U CN202221257784 U CN 202221257784U CN 217889794 U CN217889794 U CN 217889794U
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Abstract
The utility model provides a novel infrared focusing device, an infrared emitter and a cylindrical mirror form an infrared focusing unit, the infrared emitter is used for emitting infrared light, the infrared light is focused by the cylindrical mirror and then projected to the welding point position of a photovoltaic cell piece to carry out local focusing heating so as to realize the welding of the photovoltaic cell piece and a welding strip; the heat distribution on the surface of the cell is improved, the welding point position can be quickly heated to realize welding, and other regions of the cell can be prevented from being irradiated by high-power infrared light, so that the damage to the cell is reduced, the energy-saving effect is realized, the thermal strain of a welding strip in the welding process is reduced, the stable and controllable welding quality is ensured, and the problems of thermal deformation, over-welding and the like of the photovoltaic cell are avoided.
Description
Technical Field
The utility model relates to a photovoltaic cell piece welding technology field, concretely relates to novel infrared focusing device.
Background
In the photovoltaic industry, welding is one of key processes in a photovoltaic module packaging process, the welding is divided into manual welding and automatic welding, and the reliability and stability of the welding have important influence on the performance and the service life of the photovoltaic module. With the development of the technology, manual welding modes are gradually eliminated, automatic welding equipment can realize simultaneous automatic continuous welding of the front side and the back side of the photovoltaic cell according to set parameters, the productivity is higher, and the consistency is better.
The welding process adopted by the automatic welding equipment mainly comprises infrared heating, electromagnetic induction heating, hot air heating and the like, wherein the traditional infrared heating mode heats the surface of the whole battery piece in a heat radiation mode to realize the welding of the battery piece and the welding strip. The welding mode has high energy consumption, the thermal stress of the welding spot is large, the whole surface of the battery piece is easily attenuated when being heated, the heat is easily accumulated in long-time work, and the welding quality is influenced due to the over-welding caused by overhigh temperature.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a relate to a novel infrared focusing device has improved the heat distribution on battery piece surface, the welding point position can heat up faster and realize the welding, and other regions of battery piece can avoid shining of high power infrared light, thereby reduce the damage to the battery piece, realize energy-conserving effect simultaneously, the thermal strain of welding strip in welding process has been reduced, stable controllable welding quality has been guaranteed, photovoltaic cell piece thermal deformation has been avoided, the solderability problem appearance.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model also provides a novel infrared focusing device, include: an infrared focusing unit, the infrared focusing unit comprising: the infrared light emitter is used for emitting infrared light, a reflecting layer is arranged on the surface of the infrared light emitter, the cylindrical mirror and the infrared light emitter are oppositely arranged, two ends of the cylindrical mirror are connected with cylindrical mirror fixing supports, two ends of the infrared light emitter are connected with infrared light emitter fixing supports, and the infrared light emitter fixing supports are connected with the cylindrical mirror fixing supports.
The utility model provides a novel infrared focusing device has improved the heat distribution on battery piece surface, and the welding point position can heat up faster and realize the welding, and the other regions of battery piece can avoid shining of high power infrared light to reduce the damage to the battery piece, realize energy-conserving effect simultaneously, reduced the thermal strain of welding strip in welding process, guaranteed stable controllable welding quality, avoided photovoltaic cell piece thermal deformation, cross to weld the scheduling problem and appear.
The preferable technical scheme comprises the following steps: a plurality of infrared emitter mounting panels and a plurality of group as above infrared focusing unit, infrared emitter mounting panel one side is passed through infrared emitter fixed bolster and is connected with infrared focusing unit, the both sides of infrared emitter mounting panel are equipped with the spout, infrared emitter fixed bolster mutually supports with the spout in order can to adjust infrared focusing unit relatively to treat the focus heating position of welding battery piece.
According to the preferable technical scheme, the infrared light emitter mounting plate penetrates through the component mounting frame and is connected with the transmission component, the transmission component is connected with the driving component, the driving component drives the transmission component to rotate to drive the infrared light emitter mounting plate to move, and the infrared light emitter mounting plate moves to drive the infrared focusing units to move so as to adjust the distance between every two groups of infrared focusing units; be connected with cooling piece mounting bracket on the infrared emitter mounting panel another side, be connected with cooling piece mounting panel on the cooling piece mounting bracket, be connected with two cooling pieces on the cooling piece mounting panel at least, cooling piece is used for blowing the cooling gas cooling to infrared emitter, infrared emitter mounting panel with be equipped with the reflecting plate between the infrared focusing unit, the reflecting plate with the infrared emitter mounting panel is connected, it has the opening of the cooling air flow's of array circulation hole to open on the reflecting plate.
The preferable technical scheme comprises the following steps: the subassembly mounting panel, a plurality of infrared focus units of group, infrared light emitter mounting panel, cooling mounting bracket, cooling mounting panel, cooling and reflecting plate set up in on the subassembly mounting panel, subassembly mounting panel one side is connected with the subassembly mounting bracket, and subassembly mounting panel opposite side is connected with the lamp shade, still be equipped with the sensor mounting bracket on the subassembly mounting panel, swing joint has infrared sensor on the sensor mounting bracket, infrared sensor is used for gathering the local focus heating temperature of welding photovoltaic cell piece, infrared sensor is connected with the treater electricity, the treater is connected with infrared light emitter controller electricity, infrared light emitter controller is used for regulating and control infrared light emitter's operating parameter.
The preferable technical scheme comprises the following steps: the welding support is characterized in that welding support guide rails are connected to two sides of the welding support, the assembly mounting frame is connected with the assembly lifting plate through a lifting plate connecting block, the assembly lifting plate is connected with the driving assembly, the assembly lifting plate is connected with the welding support guide rails, a connecting workpiece is fixed on the assembly lifting plate, the assembly lifting plate is connected with the lifting driving assembly through the connecting workpiece, and the lifting driving assembly push-pull assembly lifting plate can adjust the distance between the infrared focusing unit and the photovoltaic cell.
As preferred technical scheme, welding stent one end is connected with vacuum generator, the welding stent other end is connected with the welding baseplate, the inside runner of having seted up of component mounting panel, the component mounting panel both sides are equipped with the vacuum adsorption mouth, the runner with vacuum adsorption mouth one end is connected, the vacuum adsorption mouth other end is connected with vacuum generator, the welding baseplate is fixed in infrared weldment work area one side.
The preferable technical scheme comprises the following steps: infrared welding work area, infrared welding work area with the subassembly mounting panel is relative setting, infrared welding work area includes: conveyer belt and tucking carrier, it forms to treat welded photovoltaic cell piece to be fixed with the solder strip in advance on the main bars of photovoltaic cell piece, treat welded photovoltaic cell piece place in on the conveyer belt one side, treat that welded photovoltaic cell piece is relative setting with tucking carrier, the hot plate is installed to the conveyer belt another side, the hot plate is used for treating welded photovoltaic cell piece and preheats.
The utility model provides a novel infrared focusing device has following beneficial effect:
1) The cylindrical mirror in the infrared focusing unit is used for collecting and converging the scattered infrared light emitted by the infrared light emitter to form narrow-area focusing irradiation heating, so that the photovoltaic cell to be welded can be accurately welded, meanwhile, the cylindrical mirror has a collecting effect on the infrared light, and the utilization rate of the infrared light is higher in an accurate welding mode, so that the infrared light emitter with lower power can reach the welding temperature, and the energy-saving effect is realized;
2) Compared with the traditional infrared welding mode, the accurate welding realized by the infrared focusing mode concentrates heat on the welding point of the main grid of the photovoltaic cell, so that the heat distribution on the surface of the photovoltaic cell is improved, the welding point position can be quickly heated to realize welding, and other areas of the photovoltaic cell can be prevented from being irradiated by high-power infrared light, so that the damage to the photovoltaic cell is reduced;
3) The welding points of the main grid of the photovoltaic cell and the welding strips arranged on the main grid are locally heated for accurate welding, so that the thermal strain of the welding strips in the welding process is reduced, the thermal stress of the welding points is smaller after the photovoltaic cell is welded into a string, and the welding quality of a photovoltaic assembly is improved;
4) The temperature of the welding area is monitored in real time through an infrared sensor, and the operating parameters of the infrared light emitter are dynamically adjusted according to the feedback result (the operating parameters of the infrared light emitter comprise: power adjustment and starting time adjustment) to maintain the temperature of a welding area to be stable, thereby ensuring the welding quality of the photovoltaic cell which is stable and controllable and avoiding the problem of over-welding;
5) Through the mutual matching of the cooling piece and the vacuum generator, the free flow of air flow in a welding thermal field is ensured, the continuous temperature rise in the welding process is avoided, and the temperature of the thermal field is controllable and uniform;
6) Structural design is last, and each infrared focusing unit independent design regulates and control alone, can dispose, adjust according to battery piece grid line pattern is nimble, the suitability is better, and the range of application is wider, and each infrared focusing array is the same relatively independent, and the interval is adjustable, can adapt to the difference and treat the technology demand of welding battery piece interval, and the head and the tail of automatic adaptation divides the cluster, has improved production efficiency.
Drawings
FIG. 1 is a block diagram of a novel infrared focusing apparatus;
FIG. 2 is a partial block diagram of a novel infrared focusing apparatus;
FIG. 3 is a diagram of an IR focusing array in a novel IR focusing apparatus;
FIG. 4 is a diagram of an IR focusing unit of a novel IR focusing apparatus;
FIG. 5 is a schematic diagram of an infrared focusing unit;
FIG. 6 is a circuit diagram of a novel infrared focusing apparatus;
wherein, 1-infrared light emitter; 2-an infrared light emitter fixing bracket; 3-cylindrical mirror; 4-cylindrical mirror fixing support; 5-infrared light emitter mounting plate; 6-cooling piece mounting rack; 7-cooling member mounting plate; 8-cooling parts; 9-a reflector plate; 10-a transmission assembly; 11-a drive assembly; 12-a reflective baffle; 13-a component mounting bracket; 14-a component mounting plate; 15-vacuum adsorption port; 16-a lampshade; 17-a sensor mount; 18-a sensor mounting plate; 19-a sensor mount; 20-an infrared sensor; 21-a heat insulation plate; 22-lifting plate connecting block; 23-assembly of a lifting plate; 24-welding the bracket; 25-welding the bracket guide rail; 26-joining the workpieces; 27-a lifting drive assembly; 28-a stop assembly; 29-a vacuum generator; 30-welding a bottom plate; 31-a conveyor belt; 32-photovoltaic cell pieces; 33-needle pressing carrier.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It is understood that the present invention achieves its objects through some embodiments.
The utility model provides a photovoltaic cell infrared focusing welded technology, including following step:
before local focus heating, the welding point of photovoltaic cell piece 32 set up in on the main bars of photovoltaic cell piece 32, the main bars both sides position of photovoltaic cell piece 32 is scribbled and is glued with the UV, and the solder strip has arranged on the main bars of photovoltaic cell piece 32, the solder strip passes through the UV glue and fixes in advance with can realizing with photovoltaic cell piece 32, and the solder strip uses scaling powder soaking treatment in advance, and infrared emitter 1, infrared emitter mounting bracket 2, cylindrical mirror 3, cylindrical mirror mounting bracket 4 to constitute infrared focusing unit, infrared emitter 1 is used for transmitting infrared light, and infrared light throws to photovoltaic cell piece 32's welding point position after 3 focuses on of cylindrical mirror and carries out local focus heating, and the solder strip is behind the local focus heating of infrared light, and the solder strip surface local melting and with photovoltaic cell piece 32 welding point alloying in order to realize the welding.
The cross section of the cylindrical mirror 3 is in a plano-convex lens shape, quartz is preferably selected as the material of the cylindrical mirror 3, and the cylindrical mirror has high transmittance in a short-wave infrared band.
The photovoltaic cell 32 is of the perc or topcon type.
The UV adhesive is organic silicon-based UV curing adhesive and is coated on two sides of each main grid of the photovoltaic cell sheet 32 in a piezoelectric valve or screen printing mode to realize the pre-fixing of the welding strip. And the UV glue is irradiated and cured by a UV light source with high optical power density.
The width that the infrared light throws photovoltaic cell piece after the cylindrical mirror is focused is less than 4mm, can form temperature gradient near the welding point of photovoltaic cell piece, improves heat distribution, infrared focusing unit and wait to weld photovoltaic cell piece interval adjustable can realize that the infrared light is from focusing the adjustment to out of focus to the welding point position of photovoltaic cell piece to realize different focus heating effects.
As shown in fig. 5, the cylindrical mirror 3 in the infrared focusing unit enables infrared light to be collected by the cylindrical mirror 3 and then converged on the photovoltaic cell 32 to be welded, and compared with the case that the infrared light directly and divergently irradiates the photovoltaic cell 32 to be welded, the utilization rate of the infrared light is greatly improved, the welding rate is increased, the welding power requirement is reduced, and the energy consumption is reduced.
The effect of infrared light focusing and heating on the photovoltaic cell to be welded is mainly determined by the optical power, the optical power density and the structural heat dissipation, wherein the optical power and the optical power density can be obtained by calculating the infrared focusing unit.
Theoretically, the light source of the system is an infrared lamp filament of the infrared light emitter 1, which can be regarded as a collection of point light sources, the optical element of the system is a cylindrical mirror 3, the cross section of the cylindrical mirror 3 is a plano-convex lens, which is referred to as a lens for short hereinafter, the receiving surface of the photovoltaic cell 32 to be welded is a working surface, and the working surface can be located at any position behind the cylindrical mirror 3.
The infrared light is emitted by the light source, the infrared light is converged at a conjugate position (an image plane) of the light source after being refracted by the lens, and the working surface is positioned at the image plane or at the front and the back of the image plane.
The light source is approximated to a surface light source with width W and light power per unit length P 0 The divergence angle is 60 DEG, the optical power density at the distance u is
The optical power received by a lens with the object distance u and the position width D is as follows:
theta is the angle of the lens to the light source, 2 theta is less than 60 DEG, and P is the angle of the lens to the light source without considering lens loss 1 I.e. the optical power in image-wise units of length.
For the optical power density calculation at the focus position, the thin lens formula is used approximately as follows:
where f is the focal length of the lens and v is the image distance, for u > f,
beta is transverse magnification, optical power density of object is F 0 ＝P 0 W, the optical power density of the image is:
the optical power density of the image is larger when the object distance is larger, the focal length is smaller, the lens width is larger, and the optical power density of the image is larger.
And for the condition that u is less than f, the emergent light is not focused, the closer the position behind the lens is, the smaller the light spot is, the higher the optical power density is, and the width of the image spot on the working surface at the position of the distance L behind the lens is approximately as follows:
the average optical power density is approximately:
the larger the object distance, the smaller the working distance, the larger the lens width, and the larger the optical power density.
For the actual welding effect, the optical power P is preferentially considered 1 The smaller the object distance, i.e. the closer the lens is to the infrared emitter, the higher the optical power, and the better the infrared heating effect.
Second, consider the optical power density F 1 Or F 2 The temperature distribution of the irradiation area is optimized to achieve the purpose of accurate welding, and for the condition that u is larger than f, the object distance is larger, the focal length of the lens is smaller, the optical power density is larger, and the optical power density obtains a maximum value when the working surface is positioned on an image plane; for u < f, the larger the object distance and the smaller the working distance, the greater the optical power density.
Further, the larger the lens width, the larger the optical power and the optical power density. In the design, the larger the width of the cylindrical mirror, the better the installation space allows.
The influence of each factor of comprehensive consideration, under the configuration of little object distance, short burnt lens, short working distance, adopt the utility model provides an infrared focusing unit, photovoltaic cell piece infrared focusing welded structure and technology can gain relative best infrared focusing heating effect.
As shown in fig. 1-2, the utility model provides a novel infrared focusing device, include: the device comprises a plurality of infrared light emitter mounting plates 5 and a plurality of groups of infrared focusing units, wherein one surface of each infrared light emitter mounting plate 5 is connected with the corresponding infrared focusing unit through an infrared light emitter fixing support 2, sliding grooves are formed in two sides of each infrared light emitter mounting plate 5, the infrared light emitter fixing supports 2 are matched with the sliding grooves, and the infrared light emitter fixing supports 2 move along the sliding grooves to adjust the local focusing heating positions of the infrared focusing units relative to a photovoltaic cell sheet 32 to be welded; the other side of the infrared emitter mounting plate 5 is connected with a cooling piece mounting frame 6, the cooling piece mounting frame 6 is connected with a cooling piece mounting plate 7, the cooling piece mounting plate 7 is connected with at least two cooling pieces 8, the cooling pieces 8 are used for cooling the infrared emitter 1 by blowing cooling air, a reflecting plate 9 is arranged between the infrared emitter mounting plate 5 and one infrared focusing unit, the reflecting plate 9 is connected with the infrared emitter mounting plate 5, the reflecting plate 9 is provided with circulation holes for arrayed cooling air flow, the infrared emitter mounting plate 5 penetrates through a component mounting frame 13 and is connected with a transmission component 10, the transmission component 10 is connected with a driving component 11, the driving component 11 drives the transmission component 10 to rotate to drive the infrared emitter mounting plate 5 to move to drive the infrared focusing unit to move, the distance adjustment of every two groups of infrared focusing units is realized, the distance requirements of different battery pieces to be welded are met, and reflection baffles 12 are respectively arranged on the outer sides of the outer focusing arrays on both sides and used for realizing the reflection and collection of infrared light, reducing the heat loss and maintaining the consistency of the internal welding temperature; a plurality of groups of infrared focusing units, infrared light emitter mounting plates 5, a cooling piece mounting frame 6, a cooling piece mounting plate 7, a cooling piece 8 and a reflection plate 9 are arranged on the component mounting plate 14, one side of the component mounting plate 14 is connected with the component mounting frame 13, the other side of the component mounting plate 14 is connected with a lampshade 16, the lampshade 16 is used for preventing strong light from stimulating the eyes of an operator, a sensor mounting frame 17 is further arranged on the component mounting plate 14, an infrared sensor 20 is movably connected onto the sensor mounting frame 17, the infrared sensor 20 is used for collecting local focusing heating temperature of a welding photovoltaic cell sheet 32, the infrared sensor 20 is electrically connected with a processor, the processor is electrically connected with an infrared light emitter controller, and the infrared light emitter controller is used for controlling the operating parameters of the infrared light emitter so as to adjust the local focusing heating temperature of the welding photovoltaic cell sheet; two sides of a welding bracket 24 are connected with welding bracket guide rails 25, the assembly mounting frame 13 is connected with an assembly lifting plate 23 through a lifting plate connecting block 22, the assembly lifting plate 23 is connected with a driving assembly 11, the assembly lifting plate 23 is connected with the welding bracket guide rails 25, a connecting workpiece 26 is fixed on the assembly lifting plate 23, the assembly lifting plate 23 is connected with a lifting driving assembly 27 through the connecting workpiece 26, the lifting driving assembly 27 drives a push-pull assembly lifting plate 23 to adjust the distance between the infrared focusing unit and the photovoltaic cell 32, the assembly mounting frame 13 is also connected with a heat insulation plate 21, the heat insulation plate 21 plays a role in isolating heat, and the driving assembly 11 on one side of the heat insulation plate 21 is prevented from being overhigh in temperature; one end of the welding bracket guide rail 25, which is close to the welding bottom plate 30, is connected with a limiting assembly 28, and the limiting assembly 28 is used for limiting the minimum distance between the infrared focusing unit and the photovoltaic cell 32; one end of the welding support 24 is connected with a vacuum generator 29, the other end of the welding support 24 is connected with a welding bottom plate 30, a flow channel is formed in the assembly mounting plate 14, the vacuum generator 29 is connected to the welding support 24, vacuum adsorption ports 15 are formed in two sides of the assembly mounting plate 14, the flow channel is connected with one end of each vacuum adsorption port 15, the other end of each vacuum adsorption port 15 is connected with the vacuum generator 29, the vacuum generator 29 performs vacuum suction on the interior of the assembly mounting plate 14 in the welding process to remove volatilized scaling powder steam, so that the internal components are cleaned, in addition, the flow direction of cooling air flow can be adjusted in the vacuum suction process, so that only the infrared light emitter 1 and the cylindrical mirror 3 are cooled, and the distribution of a thermal field of a working surface in the welding process is not influenced; the welding bottom plate 30 is fixed on one side of the infrared welding working area; the infrared welding work area with the subassembly mounting panel 14 is relative setting, infrared welding work area includes: the welding device comprises a conveyor belt 31 and a pressing needle carrier 33, wherein a welding strip is pre-fixed on a main grid of a photovoltaic cell 32 to form the photovoltaic cell 32 to be welded, the photovoltaic cell 32 to be welded is placed on one surface of the conveyor belt 31, the photovoltaic cell 32 to be welded and the pressing needle carrier 33 are arranged oppositely, a heating plate (not shown) is installed on the other surface of the conveyor belt 31, the heating plate (not shown) is used for preheating the photovoltaic cell 32 to be welded, and the pressing needle carrier 33 exerts pressure so as to ensure that the welding strip is fully contacted with a main grid welding point of the photovoltaic cell 32 to be welded, and the welding effect of a photovoltaic module is ensured;
a plurality of groups of infrared focusing units, infrared light emitter mounting plates 5, cooling piece mounting frames 6, cooling piece mounting plates 7, cooling pieces 8 and reflecting plates 9 are arranged on an assembly mounting plate 14, and the assembly mounting plate 14 protects the plurality of groups of infrared focusing units, the infrared light emitter mounting plates 5, the cooling piece mounting frames 6, the cooling piece mounting plates 7, the cooling pieces 8 and the reflecting plates 9;
be equipped with sensor mounting bracket 17 on the subassembly mounting panel 14, be connected with sensor mounting panel 18 on the sensor mounting bracket 17, the sensor mounting panel spout has been seted up on the sensor mounting panel 18, sensor mounting panel spout in-connection has sensor mount pad 19, be connected with infrared sensor 20 on the sensor mount pad 19, infrared sensor 20 can be along sensor mounting panel spout slide adjusting lateral position, realize the temperature monitoring to the different regions of welding battery piece.
The utility model provides a photovoltaic cell piece infrared focusing welded structure has improved the heat distribution on battery piece surface, and the welding point position can heat up faster and realize the welding, and the other regions of battery piece can avoid shining of high power infrared light to the reduction realizes energy-conserving effect to the damage of battery piece simultaneously, has reduced the thermal strain of welding tape in welding process, has guaranteed stable controllable welding quality, avoids the appearance of overwelding problem.
As shown in fig. 3, the utility model provides an infrared focusing array, infrared emitter mounting panel 5 one side is passed through infrared emitter fixed bolster 2 and is connected with infrared focusing unit, be connected with cooling piece mounting bracket 6 on the 5 another sides of infrared emitter mounting panel, be connected with cooling piece mounting panel on cooling piece mounting bracket 6, be connected with two cooling pieces 8 on the cooling piece mounting panel 7 at least, cooling piece is used for blowing cooling gas cooling to infrared emitter, be equipped with reflecting plate 9 between infrared emitter mounting panel 5 and the infrared focusing unit, the reflecting plate with the infrared emitter mounting panel is connected, it has the opening of the cooling air flow of array on the reflecting plate 9, so not only can realize the secondary reflection of loss infrared light, can not obstruct the passing through of cooling air flow moreover.
As shown in fig. 4, the utility model provides an infrared focusing unit, include: the device comprises a cylindrical mirror 3 and an infrared light emitter 1, wherein the cylindrical mirror 3 and the infrared light emitter 1 are oppositely arranged, and the infrared light emitter 1 is oppositely arranged in the flowing direction of a photovoltaic cell piece 32; the infrared light emitter 1 is used for emitting infrared light, a reflecting layer is arranged on the surface of the infrared light emitter 1, the reflecting layer can realize light emitting within an angle range of 60-80 degrees, the infrared light emitter 1 and the cylindrical mirror 3 are oppositely arranged, the cylindrical mirror 3 is positioned in the center of the light emitting range of the infrared light emitter 1, the distance between the cylindrical mirror 3 and the infrared light emitter 1 is adjustable, two ends of the cylindrical mirror 3 are connected with cylindrical mirror fixing supports 4, two ends of the infrared light emitter 1 are connected with infrared light emitter fixing supports 2, and the infrared light emitter fixing supports 2 are connected with the cylindrical mirror fixing supports 4; the cylindrical mirror 3 is positioned in the center of the light-emitting range of the infrared light emitter 1, and the distance between the cylindrical mirror 3 and the infrared light emitter 1 is adjustable; the infrared focusing unit is composed of an infrared light emitter 1, a cylindrical mirror 3, an infrared light emitter fixing support 2 and a cylindrical mirror fixing support 4, the infrared focusing unit focuses and projects infrared light to an illuminating area on a battery piece to be welded, the width of the illuminating area is smaller than 4mm, a temperature gradient can be formed near a main grid welding point of the battery piece to be welded, and heat distribution is improved.
As shown in fig. 6, the infrared sensor 20 is used for collecting the temperature of the local focused heating welding photovoltaic cell, the infrared sensor 20 is electrically connected with the processor, the processor is electrically connected with the infrared light emitter controller, and the infrared light emitter controller is used for controlling the operating parameters of the infrared light emitter 1 so as to adjust the local focused heating temperature of the welding photovoltaic cell 32; the operating parameters of the infrared light emitter 1 include: the power and the starting time of the infrared light emitter 1, the focusing welding temperature and the welding time window are preset;
when the temperature is controllable and is fed back by the infrared sensor 20, after the infrared light emitter 1 is started to reach the preset temperature, the infrared light emitter controller is suitable for shorter welding time in a welding time window according to a feedback signal, and the tin melting temperature of a solder strip is ensured to be reached and kept for a certain time;
when the temperature is not controllable, the infrared emitter controller closes the output after the longest welding time is suitable in the welding time window, so that the phenomenon of overwelding caused by continuous temperature rise is avoided;
according to the calibration result of the infrared sensor 20, an infrared light emitter controller PI D is set for adjustment, the power output of the infrared light emitter 1 is controlled, rapid temperature rise is achieved, and a stable welding temperature curve is ensured.
The utility model provides a novel infrared focusing device has following beneficial effect:
1) The cylindrical mirror in the infrared focusing unit is used for collecting and converging the diffused infrared light emitted by the infrared light emitter to form a narrow-area focusing irradiation heating, so that the photovoltaic cell to be welded can be accurately welded, meanwhile, the cylindrical mirror has a collecting effect on the infrared light, and the utilization rate of the infrared light is higher in an accurate welding mode, so that the infrared light emitter with lower power can reach the welding temperature, and the energy-saving effect is realized;
2) Compared with the traditional infrared welding mode, the accurate welding realized by the infrared focusing mode concentrates heat on the welding point of the main grid of the photovoltaic cell, so that the heat distribution on the surface of the photovoltaic cell is improved, the welding point position can be heated more quickly to realize welding, and other areas of the photovoltaic cell can be prevented from being irradiated by high-power infrared light, thereby reducing the damage to the photovoltaic cell;
3) The welding points of the main grid of the photovoltaic cell and the welding strips arranged on the main grid are locally heated for accurate welding, so that the thermal strain of the welding strips in the welding process is reduced, the thermal stress of the welding points is smaller after the photovoltaic cell is welded into a string, and the welding quality of a photovoltaic assembly is improved;
4) And monitoring the temperature of the welding area in real time through an infrared sensor, and dynamically adjusting the operating parameters of the infrared light emitter according to a feedback result (dynamically adjusting the operating parameters of the infrared light emitter comprises: the power adjustment and the starting time adjustment of the infrared light emitter) to maintain the temperature stability of the welding area, thereby ensuring the welding quality of the photovoltaic cell which is stable and controllable and avoiding the problem of over-welding;
5) The cooling piece is matched with the vacuum generator, so that free flow of air flow in a welding thermal field is guaranteed, continuous temperature rise in the welding process is avoided, and the temperature of the thermal field is controllable and uniform;
6) In structural design, each infrared focusing unit is independently designed and independently regulated and controlled, can be flexibly configured and adjusted according to grid line patterns of the battery pieces, has better adaptability and wider application range, is also relatively independent in each infrared focusing array, has adjustable intervals, can adapt to different process requirements of the intervals between the battery pieces to be welded, automatically adapts to head and tail string division, and improves production efficiency.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not to be limited to the specific embodiments disclosed herein, and all modifications and equivalents that fall within the scope of the claims of the present application are intended to be embraced therein. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (7)
1. A novel infrared focusing device is characterized by comprising: an infrared focusing unit, the infrared focusing unit comprising: the infrared light emitter is used for emitting infrared light, a reflecting layer is arranged on the surface of the infrared light emitter, the cylindrical mirror and the infrared light emitter are oppositely arranged, two ends of the cylindrical mirror are connected with cylindrical mirror fixing supports, two ends of the infrared light emitter are connected with infrared light emitter fixing supports, and the infrared light emitter fixing supports are connected with the cylindrical mirror fixing supports.
2. The novel infrared focusing device of claim 1, comprising: a plurality of infrared emitter mounting panels and a plurality of infrared focusing unit of group, infrared emitter mounting panel one side is passed through infrared emitter fixed bolster and is connected with infrared focusing unit, the both sides of infrared emitter mounting panel are equipped with the spout, infrared emitter fixed bolster mutually supports with the spout and treats the focus heating position of welding battery piece relatively with adjusting infrared focusing unit.
3. The novel infrared focusing device of claim 2, wherein the infrared light emitter mounting plate passes through the component mounting frame and is connected with a transmission component, the transmission component is connected with a driving component, the driving component drives the transmission component to rotate to drive the infrared light emitter mounting plate to move, and the infrared light emitter mounting plate moves to drive the infrared focusing units to move so as to adjust the distance between every two groups of infrared focusing units; the utility model discloses an infrared ray emitter mounting panel, infrared ray emitter mounting panel another side is connected with cooling piece mounting bracket, be connected with cooling piece mounting panel on the cooling piece mounting bracket, at least, be connected with two cooling pieces on the cooling piece mounting panel, cooling piece is used for blowing the cooling gas cooling to infrared ray emitter, infrared ray emitter mounting panel with be equipped with the reflecting plate between the infrared focusing unit, the reflecting plate with the infrared ray emitter mounting panel is connected, it has the circulation hole of the cooling air current of array to open on the reflecting plate.
4. A novel infrared focusing device according to claim 3, characterized by comprising: the subassembly mounting panel, a plurality of infrared focus units of group, infrared light emitter mounting panel, cooling mounting bracket, cooling mounting panel, cooling and reflecting plate set up in on the subassembly mounting panel, subassembly mounting panel one side is connected with the subassembly mounting bracket, and subassembly mounting panel opposite side is connected with the lamp shade, still be equipped with the sensor mounting bracket on the subassembly mounting panel, swing joint has infrared sensor on the sensor mounting bracket, infrared sensor is used for gathering the local focus heating temperature of welding photovoltaic cell piece, infrared sensor is connected with the treater electricity, the treater is connected with infrared light emitter controller electricity, infrared light emitter controller is used for regulating and control infrared light emitter's operating parameter.
5. The novel infrared focusing device of claim 4, comprising: the welding support is characterized in that welding support guide rails are connected to two sides of the welding support, the assembly mounting frame is connected with the assembly lifting plate through a lifting plate connecting block, the assembly lifting plate is connected with the driving assembly, the assembly lifting plate is connected with the welding support guide rails, a connecting workpiece is fixed on the assembly lifting plate, the assembly lifting plate is connected with the lifting driving assembly through a connecting workpiece, and the lifting driving assembly pushes and pulls the assembly lifting plate to adjust the distance between the infrared focusing unit and the photovoltaic cell.
6. The novel infrared focusing device of claim 5, wherein one end of the welding support is connected with a vacuum generator, the other end of the welding support is connected with a welding bottom plate, a flow channel is formed inside the component mounting plate, vacuum adsorption ports are formed in two sides of the component mounting plate, the flow channel is connected with one end of the vacuum adsorption port, the other end of the vacuum adsorption port is connected with the vacuum generator, and the welding bottom plate is fixed on one side of an infrared welding work area.
7. The novel infrared focusing device of claim 6, comprising: infrared welding work area, infrared welding work area with the subassembly mounting panel is relative setting, infrared welding work area includes: conveyer belt and tucking carrier, the pre-fixing has the solder strip to form on the main bars of photovoltaic cell piece and treats welded photovoltaic cell piece, treat welded photovoltaic cell piece place in on the conveyer belt one side, treat that welded photovoltaic cell piece is relative setting with tucking carrier, the hot plate is installed to the conveyer belt another side, the hot plate is used for treating welded photovoltaic cell piece and preheats.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221257784.2U CN217889794U (en) | 2022-05-24 | 2022-05-24 | Novel infrared focusing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221257784.2U CN217889794U (en) | 2022-05-24 | 2022-05-24 | Novel infrared focusing device |
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| CN217889794U true CN217889794U (en) | 2022-11-25 |
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| CN202221257784.2U Active CN217889794U (en) | 2022-05-24 | 2022-05-24 | Novel infrared focusing device |
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| CN (1) | CN217889794U (en) |
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