CN117790639A - Pretreatment device for improving photo-thermal attenuation characteristic of solar cell - Google Patents
Pretreatment device for improving photo-thermal attenuation characteristic of solar cell Download PDFInfo
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Abstract
The invention discloses a pretreatment device for improving the photo-thermal attenuation characteristic of a solar cell, which comprises a pretreatment assembly line, a photo-thermal attenuation treatment unit and a cooling unit, wherein the pretreatment assembly line forms a horizontal transmission surface, the horizontal transmission surface is sequentially divided into a radiation section, an infrared welding simulation section and a cooling section along the transmission direction, and the photo-thermal attenuation treatment unit comprises a laser radiator and an infrared welding simulator. According to the invention, on one hand, the battery piece can be attenuated to a steady state through laser radiation, and meanwhile, the actual welding dynamics is further accurately simulated through the infrared radiation module, so that the photo-thermal attenuation characteristic of the battery piece is improved, the bright and dark piece on the surface of the battery piece is effectively eliminated, and the stability of the battery piece is improved; on the other hand, the battery pieces subjected to photo-thermal attenuation are subjected to on-line monitoring on the battery piece treatment effect, and the battery pieces with dark pieces on the surfaces are removed, so that qualified products are guaranteed to enter an assembly process, and meanwhile, each battery piece is pretreated under the same working condition, so that the uniformity of the products is good, and the yield is improved.
Description
Technical Field
The invention belongs to the technical field of solar cell manufacturing, and particularly relates to a pretreatment device for improving the photo-thermal attenuation characteristic of a solar cell.
Background
The solar cell is a photoelectric semiconductor sheet which directly generates electricity by utilizing sunlight, is also called a solar chip or a photocell, and can output voltage instantly and generate current under the condition of a loop as long as the solar cell is subjected to illuminance meeting a certain illuminance condition. Physically, solar Photovoltaic (PV) is abbreviated as Photovoltaic.
At present, in the production process of solar cells, particularly in the welding and assembling process of the cells, the problem of photo-thermal attenuation (LETID) phenomenon of the solar cells after illumination (photo-thermal generated by welding) exists, and the method is characterized in that the surface of the cells is provided with bright and dark sheets during welding and assembling, so that the photoelectric conversion efficiency of the solar cells is seriously influenced.
However, in the actual battery piece processing process, under the irradiation of a common infrared lamp tube or a halogen lamp tube, the actual assembly welding working condition is difficult to accurately simulate, so that the battery piece processing effect is not ideal, the light and heat attenuation of the battery piece cannot be ensured to be stable, the light and heat attenuation phenomenon still can be continuously generated when the battery piece is welded and assembled, and the photoelectric conversion efficiency of the battery piece is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing an improved pretreatment device for improving the photo-thermal attenuation characteristic of a solar cell.
In order to solve the technical problems, the invention adopts the following technical scheme:
the pretreatment device comprises a pretreatment assembly line, a photothermal attenuation treatment unit and a cooling unit which are sequentially arranged on the pretreatment assembly line, wherein the pretreatment assembly line forms a horizontal transmission surface, the horizontal transmission surface is sequentially divided into a radiation section, an infrared welding simulation section and a cooling section along the transmission direction, the photothermal attenuation treatment unit comprises a laser radiator formed in the radiation section and an infrared welding simulator formed in the infrared welding simulation section, the laser radiator forms a radiation area and attenuates the surfaces of the battery pieces entering the radiation area block by block to a steady state, the infrared welding simulator comprises an infrared radiation module positioned above the infrared welding simulation section, and a motion module which is used for simulating welding dynamics and driving the infrared radiation module to move up and down, the motion module is synchronous with the pretreatment assembly line, the time of the battery pieces passing through the infrared welding simulation section one by one is T1, the time required by one period of up and down motion of the infrared radiation module is T2, wherein T1=NxT2, and N is more than or equal to 1.
By setting t1=nχt2, N is greater than or equal to 1 and is an integer, so that the infrared radiation module completes at least one movement when passing through the infrared welding simulation section one by one (of course, the movement of the external radiation module can be adjusted completely according to the actual working condition when passing through the infrared welding simulation section one by one in two periods or three or more periods), and the final purpose is to improve the photo-thermal attenuation characteristic of the solar cell (at least to perform the photo-thermal attenuation characteristic in the movement approaching gradually). According to a specific implementation and preferred aspect of the present invention, t1=t2. In short, the time that the battery pieces pass through the infrared welding simulation section piece by piece is equal to the time required by the infrared radiation module to move up and down for one period, so that the distance interval setting of each battery piece entering and exiting the infrared welding simulation section is more convenient. Preferably, when the battery piece enters the infrared welding simulation section, the infrared radiation module moves downwards from the highest position to the lowest position so as to be close to the surface of the battery piece; when all the battery pieces are sent out of the infrared welding simulation section, the infrared radiation module moves upwards from the lowest position to the highest position so as to be far away from the surface of the battery pieces, and the moving process is repeated so as to finish the infrared welding simulation processing of the battery pieces one by one. That is, when the battery pieces pass through the infrared welding simulation section one by one, at least one process of gradual enhancement and gradual weakening is maintained, so that the photo-thermal attenuation characteristic of the solar battery pieces is improved optimally, and meanwhile, when each battery piece enters the infrared welding simulation section, the battery pieces are kept to move up and down, so that the surface treatment of each battery piece is completed under the same simulation working condition.
In some embodiments, the time that each battery piece is in the infrared welding simulation segment is 5-8 seconds when the welding is simulated. Thus, enough time is available for the simulation of the infrared welding conditions.
Preferably, the actual welding temperature is matched to accurately simulate the actual welding working condition of the battery piece. In the infrared welding simulation section, the corresponding surface temperature of the battery piece is 220-230 ℃.
According to a further specific implementation and preferred aspect of the invention, the infrared radiation module comprises an upper cover and a plurality of infrared lamp tubes which are distributed in the upper cover side by side, wherein when the infrared radiation module is at the lowest position in one movement period, the upper cover is covered on the infrared welding simulation section, and a feed inlet and a discharge outlet of the battery piece are formed between the upper cover and the pretreatment assembly line. Here, take the upper shield, can avoid the interference of external light, the infrared radiation module is in a motion cycle simultaneously, can promote the battery piece surface temperature fast and at the highest high temperature and the rate of change between the lowest temperature, satisfies the battery piece and carries out the photo-thermal decay process in very short time to promote the preliminary treatment efficiency of battery piece.
Preferably, the upper cover is connected with a connecting plate which is horizontally arranged, and a plurality of infrared lamp tubes are connected on the bottom surface of the connecting plate at intervals side by side along the transmission direction of the battery piece. The layout and installation of the actual lamp tube are facilitated.
Specifically, the bottom surface of the connecting plate is provided with a plurality of clamping blocks, and each infrared lamp tube is correspondingly clamped on the clamping blocks from two end parts; the length direction of each infrared lamp tube is perpendicular to the transmission direction of the battery piece.
Preferably, each clamp block comprises a first clamp portion and a second clamp portion which maintain relative clamping tendencies, wherein each of the first clamp portion and the second clamp portion comprises a first section extending vertically, a second section extending inward and downward obliquely from the first section, and a third section extending outward and downward obliquely from a lower end of the second section, and when installed, the infrared lamp tube is positioned and clamped between the two first sections from the corresponding end. Here, the disassembly and assembly are simple and convenient.
Preferably, the periphery of the upper cover is also respectively provided with a flow guiding part, and a converging space which is gradually narrowed from top to bottom is formed between the flow guiding parts at the periphery; the infrared radiation module still includes the cooling air current pipeline that is linked together with the space that converges, sets up a plurality of cooling fans at upper cover top, and the cooling air current pipeline is including being responsible for and many branch pipes, and wherein the intercommunication has a branch pipe at least on each water conservancy diversion portion, and during the simulation welding, cooling air current gets into the space that converges and gathers to the middle part after, upwards discharges from cooling fan, and many infrared lamp pipes are located the flow path of cooling air current. Here, it is convenient for accurate control of welding temperature; meanwhile, the infrared lamp tube is cooled rapidly, the temperature of the lamp tube is prevented from being too high, the lamp tube can continuously work for a long time, and the service life of the lamp tube can be prolonged.
According to a further specific implementation and preferred aspect of the present invention, the movement module comprises a vertically extending lifting rail, a connecting seat connected to the lifting rail in a vertically sliding manner, and a driving member for driving the connecting seat, wherein the infrared radiation module is fixedly connected to the connecting seat, the connecting seat comprises a seat body, and two connecting arms positioned on two opposite sides of the seat body, wherein each connecting arm is L-shaped, and one part of each connecting arm is fixedly connected with the seat body, and the other part of each connecting arm is fixedly connected with the infrared radiation module.
According to still another specific implementation and preferred aspect of the present invention, the surface temperature of the battery sheet is 80-100 ℃ after the battery sheet passes through the radiation zone.
Preferably, the laser radiator comprises a radiation box with an inlet and an outlet, and a laser emitting element arranged in the radiation box, and the battery piece sequentially passes through the inlet, the radiation area and the outlet along with transmission. The laser treatment of the battery piece is implemented in a relatively closed environment, so that the battery piece has a good heat preservation effect, the battery piece is ensured to be stably attenuated to a steady state, and the influence of the outside on the battery piece can be effectively prevented.
Preferably, the laser radiator further comprises a dispersing module for dispersing the laser light emitted by the laser emitting element and forming a radiation zone. Here, the laser light is conveniently dispersed into a plane to uniformly radiate on the surface of the battery sheet.
Preferably, the laser radiator further comprises a plurality of cooling fans provided on the radiation box for cooling the laser emitting element, wherein the plurality of cooling fans are spaced apart along the conveyance direction of the battery sheet. Here, the laser emission element is cooled online in real time, so that continuous uninterrupted processing of a large number of battery pieces is facilitated.
In addition, the pretreatment assembly line comprises an annular conveying belt and a plurality of heating modules which are distributed in sequence along the conveying direction of the battery piece, wherein the upper surface of the annular conveying belt forms a horizontal conveying surface, and when the upper surface of the battery piece is subjected to laser radiation or/and infrared radiation, the lower surface of the battery piece is synchronously heated; each heating module comprises a heat conduction module attached to the bottom surface of the upper transmission belt and a plurality of heating rods inserted on the heat conduction module.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
the traditional infrared or halogen lamp tube is adopted for irradiation in the existing battery piece treatment, the defect that the battery piece treatment effect is not ideal due to the fact that the actual welding working condition is difficult to accurately simulate is overcome, the battery piece cannot be guaranteed to reach a steady state after being attenuated, the photo-thermal attenuation phenomenon still occurs when welding and assembling are carried out, the battery piece is attenuated when the photoelectric conversion efficiency is used, the whole design is carried out on the battery piece pretreatment device, the defects and the defects in the prior art are ingeniously overcome, after the pretreatment device is adopted, the battery piece is placed on a pretreatment assembly line piece by piece, and in the transmission process of the battery piece, laser emitted by a laser radiator irradiates the surface of the battery piece at first through a radiation area, and the battery piece is attenuated to the steady state; then, the battery pieces pass through the infrared radiation module piece by piece, the actual welding dynamics is simulated through the up-and-down movement of the infrared radiation module, the time of the battery pieces passing through the infrared welding simulation section piece by piece is an integral multiple of the time required by the up-and-down movement of the infrared radiation module, so that the battery pieces finish the improvement of the photo-thermal attenuation characteristics of the battery pieces at least in one movement period of the infrared radiation module, and compared with the prior art, the invention can attenuate the battery pieces to a steady state through laser radiation, simultaneously further accurately simulate the actual welding dynamics through the infrared radiation module, the distance change between the infrared radiation module and the battery piece surface is realized, the photo-thermal attenuation characteristics of each battery piece in the infrared welding simulation section are improved piece by piece at least in one movement stroke of the infrared radiation module, the phenomenon of the battery piece surface is effectively eliminated, and the stability of the battery pieces is also obviously improved; on the other hand, the battery pieces subjected to photo-thermal attenuation can be subjected to online synchronous monitoring on the battery piece treatment effect, and the battery pieces with dark pieces or dark fields on the surfaces are removed, so that qualified products are guaranteed to enter an assembly process, and meanwhile, each battery piece is subjected to pretreatment under the same working condition, so that the uniformity of the products is good, and the yield is improved.
Drawings
Fig. 1 is a schematic perspective view of a pretreatment device for improving the photo-thermal attenuation characteristics of a solar cell according to the present invention;
FIG. 2 is a front view of the photothermal attenuation unit of FIG. 1;
FIG. 3 is a schematic view of the semi-sectional structure of FIG. 2;
FIG. 4 is an enlarged schematic view of the structure shown in FIG. 3A;
wherein: 1. a pretreatment assembly line; 10. a conveyor belt; d1, a radiation section; d2, an infrared welding simulation section; d3, a cooling section; 100. a receiving rack; 11. a heating module; 110. a heat conduction module; 111. a heating rod;
2. a photothermal attenuation processing unit; 20. a laser radiator; 200. a radiation box; k0, inlet; k1, an outlet; 201. a cooling fan; 21. an infrared welding simulator; 210. an infrared radiation module; a0, upper cover; a00, a diversion part; k2, a feed inlet; k3, a discharge hole; a1, an infrared lamp tube; a01, connecting a plate; j1, a first clamping part; j11, a first section; j12, a second section; j13, a third section; j2, a second clamping part; a2, a cooling airflow pipeline; a20, a main pipe; a21, branch pipes; a3, a heat dissipation fan; 211. a motion module; b0, lifting rail; b1, a connecting seat; b10, a seat body; b11, a connecting arm; b2, a driving piece;
3. and a cooling unit.
Detailed Description
The present invention will be described in detail with reference to the drawings and the detailed description, so that the above objects, features and advantages of the present invention can be more clearly understood. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above" and "over" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under," "under" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions are used herein for illustrative purposes only and are not meant to be the only embodiment.
As shown in fig. 1 to 4, a pretreatment device for improving the photothermal attenuation characteristics of a solar cell sheet of the present embodiment includes a pretreatment line 1, a photothermal attenuation processing unit 2 disposed on the pretreatment line 1, and a cooling unit 3.
Specifically, the pretreatment assembly line 1 comprises an annular conveying belt 10, and a plurality of heating modules 11 sequentially distributed along the conveying direction (battery piece conveying direction) of the annular conveying belt 10, wherein the upper surface of the annular conveying belt 10 forms a horizontal conveying surface, the horizontal conveying surface is sequentially divided into a radiation section d1, an infrared welding simulation section d2 and a cooling section d3 along the conveying direction, battery pieces are sequentially placed on the upper surface of the annular conveying belt 10 one by one for sequential conveying, a material receiving rack 100 which extends obliquely is arranged at the discharge end of the conveying belt 10, and the battery pieces after treatment automatically fall into and are stacked on the material receiving rack 100 along with the conveying; each heating module 11 comprises a heat conducting module 110 attached to the bottom surface of the upper conveying belt 10, and a plurality of heating rods 111 inserted on the heat conducting module 110, wherein the heating rods 111 are distributed at intervals side by side along the conveying direction of the conveying belt 10, and each heating rod 111 is perpendicular to the conveying direction of the conveying belt 10.
In this example, the photothermal attenuation processing unit 2 includes a laser radiator 20 formed in a radiation section d1, and an infrared welding simulator 21 formed in an infrared welding simulation section d2, wherein the laser radiator 20 and the infrared welding simulator 21 are sequentially disposed along the transmission belt 10, the laser radiator 20 is capable of forming a radiation area covering the surface of the battery piece, and attenuating the surface of the battery piece that enters the radiation area block by block to a steady state; the infrared welding simulator 21 comprises an infrared radiation module 210 and a motion module 211, wherein the infrared radiation module 210 is positioned above an infrared welding simulation section, the motion module 211 is used for simulating welding dynamics and driving the infrared radiation module 210 to move up and down, the motion module 211 is synchronous with the pretreatment assembly line 1, battery pieces pass through the infrared welding simulation section one by one, the time of the battery pieces passing through the infrared welding simulation section one by one is T1, the time required by the infrared radiation module to move up and down for one period is T2, wherein T1=N is equal to or more than T2, and N is an integer. Meanwhile, when the upper surface of the battery piece is subjected to laser radiation or/and infrared radiation, the lower surface of the battery piece is synchronously heated through the heating module 11.
In some embodiments, the laser radiator 20 includes a radiation box 200 having an inlet k0 and an outlet k1, a laser emitting element disposed within the radiation box 200, and a battery sheet sequentially passing through the inlet k0, the radiation region, and the outlet k1 as transmitted; the laser radiator 20 further includes a dispersing module for dispersing the laser emitted by the laser emitting element and forming a radiation area, where the dispersing module may be any laser diffuser of conventional technology, in this embodiment, the laser emitting element is a conventional element, the emitted laser passes through the dispersing module and is output, the formed radiation area is matched with the upper surface of the corresponding battery piece, and when the battery piece enters the radiation area, the laser irradiates the battery piece by piece, and the surface temperature of the corresponding battery piece is 80-100 ℃; the laser radiator 20 further includes a plurality of cooling fans 201 provided on the radiation box 200 for cooling the laser emitting elements, wherein the plurality of cooling fans 201 are spaced apart along the battery sheet conveying direction.
In this embodiment, t1=t2 (i.e., n=1) during the simulated welding, so when the battery piece enters the infrared welding simulation section, the infrared radiation module moves downward from the highest position to the lowest position to be close to the surface of the battery piece; when all the battery pieces are sent out of the infrared welding simulation section, the infrared radiation module moves upwards from the lowest position to the highest position so as to be far away from the surface of the battery pieces, and the moving process is repeated so as to finish the infrared welding simulation processing of the battery pieces one by one.
Specifically, the time of each battery piece in infrared radiation is 5-8 seconds, the surface temperature of the battery piece is 220-230 ℃ (the change of the actual welding distance is simulated according to the change of the distance of illumination), and the temperature is synchronously changed along with the change of the actual welding distance). For example, in setting the throughput of 3000 sheets/hour, the time during which each of the battery sheets is in the infrared radiation is set to 6 seconds, in other words, 6 seconds is taken for each of the battery sheets to be transported from the inlet k2 to the outlet k3.
In some embodiments, the infrared radiation module 210 includes an upper cover a0, and a plurality of infrared lamp tubes a1 distributed inside the upper cover a0, where the upper cover a0 covers the periphery of the battery piece and forms a feeding port k2 and a discharging port k3 of the battery piece with the pretreatment assembly line 1 when the infrared radiation module 210 is at the lowest position in one movement period.
For convenient implementation, the periphery of the upper cover a0 is also respectively provided with a flow guiding part a00, and converging spaces which are gradually narrowed from top to bottom are formed among the periphery flow guiding parts a 00; the infrared radiation module 210 further comprises a cooling airflow pipeline a2 communicated with the converging space, and a plurality of cooling fans a3 arranged at the top of the upper cover a0, wherein the cooling airflow pipeline a2 comprises a main pipe a20 and a plurality of branch pipes a21, at least one branch pipe a21 is communicated with each flow guiding part a00, and during simulated welding, cooling airflow enters the converging space and is converged to the middle part and is discharged upwards from the cooling fans a3, and a plurality of infrared lamp tubes a1 are positioned on the flow path of the cooling airflow.
In order to further facilitate assembly, a connecting plate a01 which is horizontally arranged is connected in the upper cover a0, a plurality of infrared lamp tubes a1 are connected on the bottom surface of the connecting plate a01 at intervals side by side along the transmission direction of the battery piece, and each infrared lamp tube a1 is perpendicular to the transmission direction of the battery piece; in some specific embodiments, the bottom surface of the connecting plate a01 is provided with a plurality of clamping blocks, and each infrared lamp tube a1 is correspondingly clamped on the clamping blocks from two end parts; each clamping block comprises a first clamping part j1 and a second clamping part j2 which keep relative clamping trend, wherein the first clamping part j1 and the second clamping part j2 are symmetrically arranged, the first clamping part j1 comprises a first section j11 which extends vertically, a second section j12 which extends inwards and downwards obliquely from the first section j11, and a third section j13 which extends outwards and downwards obliquely from the lower end part of the second section j12, when the infrared lamp tube a1 is installed, the corresponding end part of the infrared lamp tube a1 is positioned and clamped between the two first sections j11, and the second end j12 below can form positioning in the vertical direction on the end part of the infrared lamp tube a 1.
The moving module 211 comprises a vertically extending lifting rail b0, a connecting seat b1 connected to the lifting rail b0 in an up-down sliding manner, and a driving piece b2 for driving the connecting seat b1, wherein the infrared radiation module 210 is fixedly connected to the connecting seat.
In some embodiments, the connecting seat b1 includes a seat body b10 and two connecting arms b11 located at two opposite sides of the seat body b10, wherein each connecting arm b11 is L-shaped, and one part of each connecting arm b11 is fixedly connected with the seat body b10, and the other part is fixedly connected with the top surface of the upper cover a 0.
In addition, the cooling units 3 are located in the cooling section d3, and the cooling units 3 are provided with two groups and are butted with the discharge port k3, wherein each group of cooling units 3 adopts a conventional air cooling technology, and details are not repeated here.
In order to prove the technical effect brought by the solar cell processing in the embodiment, two groups of cells are selected for light attenuation test.
Ten battery pieces (serial numbers 1-10) of one group are processed by adopting a traditional processing mode, and data obtained after testing are shown in table 1;
the ten battery pieces (serial numbers 1 to 10) of the other group are processed by the pretreatment device of the embodiment, and the data obtained after the test are shown in table 2;
as is apparent from the comparison of the above test data, the efficiency (Eta) of each battery piece still has a larger attenuation value when the battery piece processed by the conventional processing method in table 1 is subjected to the light attenuation test, while the efficiency of each battery piece is basically unchanged (or attenuation does not cause the appearance of a bright and dark piece at the component end in the normal range) after the battery piece processed by the pretreatment device in table 2 is subjected to the light attenuation test.
In summary, after the pretreatment device is adopted, the battery pieces are placed on a pretreatment assembly line piece by piece, and in the process of transmission, the battery pieces pass through a radiation area, and laser emitted by a laser radiator irradiates the surface of the battery pieces, so that the battery pieces are attenuated to a steady state; then, the battery pieces pass through the infrared radiation module piece by piece, the actual welding dynamics is simulated through the up-and-down motion of the infrared radiation module, the time of the battery pieces passing through the infrared welding simulation section piece by piece is an integral multiple of the time required by the up-and-down motion of the infrared radiation module to recover the photo-thermal attenuation phenomenon of the battery pieces under the actual welding working condition, therefore, compared with the prior art, the invention can attenuate the battery pieces to a steady state through laser radiation on one hand, meanwhile, the actual welding dynamics is further simulated accurately through the infrared radiation module, the distance between the infrared radiation module and the surface of the battery pieces is changed, the photo-thermal attenuation characteristic of each battery piece passing through the infrared welding simulation section is improved piece by piece at least in one infrared radiation module motion stroke, the phenomenon of bright and dark piece on the surface of the battery pieces is effectively eliminated, and the stability of the battery pieces is also remarkably improved; on the other hand, the battery pieces subjected to photo-thermal attenuation can be used for synchronously monitoring the battery piece treatment effect on line, and the battery pieces with dark pieces or dark fields on the surfaces are removed to ensure that qualified products enter an assembly process, and each battery piece is pretreated under the same working condition, so that the uniformity of the products is good, and the yield is improved; in the third aspect, the laser treatment is implemented under a relatively closed environment, so that the battery piece has a good heat preservation effect, the battery piece is ensured to be stably attenuated to a steady state, and the influence of the outside on the battery piece can be effectively prevented; in the fourth aspect, a dispersing module is adopted, so that laser is conveniently dispersed into a surface to be uniformly radiated on the surface of the battery piece; in the fifth aspect, the laser emission element is cooled on line in real time, so that continuous uninterrupted processing of a large number of battery pieces is facilitated; in the sixth aspect, the surface temperature of the battery piece is 220-230 ℃ during the simulated welding. Matching the actual welding temperature to accurately simulate the actual welding working condition of the battery piece; in a seventh aspect, the upper cover is adopted, so that the interference of external light can be avoided, meanwhile, the change rate of the surface temperature of the battery piece between the highest temperature and the lowest temperature can be rapidly improved in one movement period by the infrared radiation module, the condition that the battery piece performs a photo-thermal attenuation process in extremely short time is met, and therefore the pretreatment efficiency of the battery piece is improved; eighth, realize the fast cooling to the infrared lamp tube, prevent the tube from the too high temperature, make it can work continuously for a long time, and can lengthen the service life of the tube; in the ninth aspect, when the upper surface of the battery piece is subjected to laser radiation and infrared radiation, the lower surface of the battery piece is synchronously heated, so that the synchronism of the temperatures of the upper surface and the lower surface is realized, and the damage of the battery piece is avoided.
The present invention has been described in detail with the purpose of enabling those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (15)
1. The pretreatment device for improving the photo-thermal attenuation characteristics of the solar cell comprises a pretreatment assembly line, and a photo-thermal attenuation treatment unit and a cooling unit which are sequentially distributed on the pretreatment assembly line, and is characterized in that the pretreatment assembly line forms a horizontal transmission surface, the horizontal transmission surface is sequentially divided into a radiation section, an infrared welding simulation section and a cooling section along the transmission direction, the photo-thermal attenuation treatment unit comprises a laser radiator formed in the radiation section and an infrared welding simulator formed in the infrared welding simulation section, the laser radiator forms a radiation area, the surface of a cell entering the radiation area block by block is attenuated to a steady state, the infrared welding simulator comprises an infrared radiation module located above the infrared welding simulation section, and a motion module used for simulating the dynamic and driving the infrared radiation module to move up and down, the motion module is synchronous with the pretreatment assembly line, the cell passes through the infrared welding simulation section one by one, the time of the cell passes through the infrared welding simulation section one by one is T1, the time required by one of the cell passes through the infrared radiation simulation section is T1, the time required by one is N=2, and the time required by the cell is N=1.
2. The pretreatment device for improving photothermal attenuation characteristics of a solar cell according to claim 1, wherein t1=t2.
3. The pretreatment device for improving the photothermal attenuation characteristics of a solar cell according to claim 2, wherein when the cell enters the infrared welding simulation section, the infrared radiation module moves downwards from a highest position to a lowest position to be close to the surface of the cell; when all the battery pieces are sent out of the infrared welding simulation section, the infrared radiation module moves upwards from the lowest position to the highest position so as to be far away from the surface of the battery piece, and the moving process is repeated to complete the infrared welding simulation processing of the battery pieces.
4. The pretreatment device for improving the photothermal attenuation characteristics of solar cells according to claim 1, wherein the time for each cell to be in an infrared welding simulation period is 5-8 seconds when the simulation welding is performed.
5. The pretreatment device for improving solar cell photo-thermal decay characteristics of claim 1, wherein the corresponding cell surface temperature is 220-230 ℃ in the infrared welding simulation section.
6. The pretreatment device for improving the photothermal attenuation characteristic of a solar cell according to claim 1, wherein the infrared radiation module comprises an upper cover and a plurality of infrared lamp tubes which are distributed in the upper cover side by side, and when the infrared radiation module is at the lowest position in a movement period, the upper cover is covered on the infrared welding simulation section and forms a feed inlet and a discharge outlet of the cell with the pretreatment assembly line.
7. The pretreatment device for improving the photothermal attenuation characteristics of a solar cell according to claim 6, wherein a connecting plate horizontally arranged is connected in the upper cover, and the plurality of infrared lamp tubes are connected to the bottom surface of the connecting plate at intervals side by side along the cell transmission direction.
8. The pretreatment device for improving the photothermal attenuation characteristics of a solar cell according to claim 7, wherein a plurality of clamping blocks are arranged on the bottom surface of the connecting plate, and each infrared lamp tube is correspondingly clamped on the clamping blocks from two end parts; the length direction of each infrared lamp tube is perpendicular to the transmission direction of the battery piece.
9. The pretreatment device for improving the photothermal attenuation characteristics of a solar cell according to claim 8, wherein each of said clamping blocks comprises a first clamping portion and a second clamping portion maintaining a relative clamping tendency, wherein said first clamping portion and said second clamping portion each comprise a first section extending vertically, a second section extending obliquely inward and downward from said first section, a third section extending obliquely outward and downward from a lower end of said second section, and wherein said infrared lamp tube is positioned and clamped between said two first sections from the corresponding end when installed.
10. The pretreatment device for improving the photo-thermal attenuation characteristics of solar cells according to claim 6, 7, 8 or 9, wherein the periphery of the upper cover is further provided with flow guiding parts, and converging spaces gradually narrowed from top to bottom are formed between the peripheral flow guiding parts; the infrared radiation module still include with cooling air current pipeline that converges the space and be linked together, set up a plurality of radiator fan at upper shield top, cooling air current pipeline includes main pipe and many branch pipes, wherein each at least the intercommunication has on the water conservancy diversion portion the branch pipe, during the simulation welding, cooling air current gets into after converging the space and converging to the middle part, upwards follow radiator fan discharges, a plurality of infrared lamp pipes are located cooling air current's flow path.
11. The pretreatment device for improving the photothermal attenuation characteristic of a solar cell according to claim 1, wherein the movement module comprises a vertically extending lifting rail, a connecting seat connected to the lifting rail in an up-down sliding manner, and a driving piece for driving the connecting seat, wherein the infrared radiation module is fixedly connected to the connecting seat, the connecting seat comprises a seat body and two connecting arms positioned on two opposite sides of the seat body, each connecting arm is L-shaped, and one part of each connecting arm is fixedly connected with the seat body, and the other part of each connecting arm is fixedly connected with the infrared radiation module.
12. The pretreatment device for improving the photothermal attenuation characteristic of a solar cell according to claim 1, wherein the surface temperature of the cell after passing through the radiation area is 80-100 ℃.
13. The pretreatment device for improving photothermal attenuation characteristics of a solar cell according to claim 1, wherein the laser radiator comprises a radiation box having an inlet and an outlet, a laser emitting element disposed within the radiation box, and the cell sequentially passes through the inlet, the radiation area, and the outlet as it is transmitted.
14. The pretreatment device for improving the photothermal attenuation characteristics of a solar cell according to claim 13, wherein the laser radiator further comprises a dispersing module for dispersing the laser light emitted from the laser emitting element and forming the radiation area; and/or the laser radiator further comprises a plurality of cooling fans which are arranged on the radiation box and used for cooling the laser emitting element, wherein the plurality of cooling fans are distributed at intervals along the transmission direction of the battery piece.
15. The pretreatment device for improving the photothermal attenuation characteristic of a solar cell according to claim 1, wherein the pretreatment assembly line comprises an annular transmission belt and a plurality of heating modules which are sequentially distributed along the transmission direction of the cell, the upper surface of the annular transmission belt forms the horizontal transmission surface, and the lower surface of the cell is synchronously heated when the upper surface of the cell is subjected to laser radiation or/and infrared radiation; each heating module comprises a heat conduction module and a plurality of heating rods, wherein the heat conduction module is attached to the bottom surface of the transmission belt on the upper side, and the heating rods are inserted into the heat conduction module.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110571162A (en) * | 2019-09-16 | 2019-12-13 | 南京航空航天大学 | device for simulating solar cell illumination heat attenuation and method for detecting attenuation |
| CN113241390A (en) * | 2021-04-28 | 2021-08-10 | 天津爱旭太阳能科技有限公司 | Light injection method and system for crystalline silicon solar cell and cell |
| CN213916628U (en) * | 2020-10-30 | 2021-08-10 | 武汉帝尔激光科技股份有限公司 | Laser processing equipment |
| CN114629437A (en) * | 2020-12-10 | 2022-06-14 | 浙江爱旭太阳能科技有限公司 | Thermal infrared attenuation equipment for battery piece and testing method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571162A (en) * | 2019-09-16 | 2019-12-13 | 南京航空航天大学 | device for simulating solar cell illumination heat attenuation and method for detecting attenuation |
| CN213916628U (en) * | 2020-10-30 | 2021-08-10 | 武汉帝尔激光科技股份有限公司 | Laser processing equipment |
| CN114629437A (en) * | 2020-12-10 | 2022-06-14 | 浙江爱旭太阳能科技有限公司 | Thermal infrared attenuation equipment for battery piece and testing method thereof |
| CN113241390A (en) * | 2021-04-28 | 2021-08-10 | 天津爱旭太阳能科技有限公司 | Light injection method and system for crystalline silicon solar cell and cell |
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