CN111068977A - Photovoltaic solder strip soldering flux coating device and coating method - Google Patents
Photovoltaic solder strip soldering flux coating device and coating method Download PDFInfo
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- CN111068977A CN111068977A CN201811223585.8A CN201811223585A CN111068977A CN 111068977 A CN111068977 A CN 111068977A CN 201811223585 A CN201811223585 A CN 201811223585A CN 111068977 A CN111068977 A CN 111068977A
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- soldering flux
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
- B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/12—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being fed round the roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
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Abstract
The invention provides a photovoltaic solder strip soldering flux coating device and a coating method, wherein the coating device comprises a soaking mechanism and a material supplementing mechanism, and the soaking mechanism is configured to immerse a photovoltaic solder strip in soldering flux; the feeding mechanism is configured to apply flux to one side of the photovoltaic solder strip from the soaking mechanism. The coating method of the invention firstly immerses two sides of the photovoltaic solder strip into the soldering flux; and after the photovoltaic solder strip is removed from the soldering flux, the soldering flux is supplemented to the lower surface of the photovoltaic solder strip from which the soldering flux is removed in a contact and/or splashing mode. The invention can make the soldering flux on the solder strip achieve the effect of less flux on the upper part and more flux on the lower part, prevent the loss of the soldering flux in the soldering process from causing over soldering or insufficient soldering, and improve the soldering quality.
Description
Technical Field
The invention relates to the technical field of photovoltaic cell manufacturing, in particular to a photovoltaic solder strip soldering flux coating device and method.
Background
The welding of heterojunction high-efficiency crystalline silicon battery pieces (hereinafter abbreviated as HIT) is to perform series welding (hereinafter abbreviated as series welding) on tin-coated copper strips (welding strips) on front and rear battery pieces at a certain temperature to form a battery string. In order to achieve a good welding effect, the soldering flux is used for assisting welding, and the soldering flux is used for removing oxides on the surface of the tin-coated copper strip and reducing the surface tension of a welding material, so that the silver paste and the tin-coated copper strip are welded more firmly.
The soldering flux is generally coated on the surface of the tin-coated copper strip, and two common coating modes are available, wherein one mode is a soaking mode, and the tin-coated copper strip is completely soaked in the soldering flux. The other is of a smearing type, and is smeared by using sponge or other materials with strong water absorption.
The immersion type is easy to adhere to excessive soldering flux on the surface of the tin-coated copper strip, the soldering flux is easy to overweld during soldering, the excessive soldering flux remains on the battery piece, air bubbles are easy to generate during lamination, and in the subsequent use process, the soldering flux and the battery piece and EVA materials are easy to delaminate, so that the assembly is ineffective. The coating mode easily causes less soldering flux on the surface of the tin-coated copper strip, and the effective components volatilize too much at high soldering temperature, so that the soldering assisting effect is not ideal, and the insufficient soldering is easily generated. The HIT battery piece adopts infrared welding, and scaling powder is paintd and is adopted two kinds of modes more than, and the welding effect is unsatisfactory, leads to rosin joint or overwelding easily, and the pulling force is not up to standard, has restricted HIT battery pack's volume production.
Disclosure of Invention
The invention aims to provide a photovoltaic solder strip soldering flux coating device and a photovoltaic solder strip soldering flux coating method, which solve the problem that the existing solder strip coating mode easily causes solder over-soldering or under-soldering.
According to one aspect of the invention, there is provided a photovoltaic solder strip flux coating apparatus comprising:
a soaking mechanism configured to immerse the photovoltaic solder strip in flux;
a feeding mechanism configured to apply flux to one side of the photovoltaic solder strip from the soaking mechanism.
In an exemplary embodiment of the invention, the soaking mechanism comprises a soaking tank for containing soldering flux and a guiding device, wherein the guiding device is at least partially positioned in the soaking tank, so that the part of the photovoltaic welding strip below the guiding device is immersed in the soldering flux under the condition that the soldering flux is contained in the soaking tank and at least the bottom of the guiding device is submerged by the soldering flux.
In an exemplary embodiment of the invention, the feeding mechanism comprises a feeding box for containing soldering flux, and a first rotating wheel, a part of the first rotating wheel is located below the liquid level of the soldering flux in the feeding box, and the first rotating wheel is configured to coat the soldering flux in the feeding box on one side of the photovoltaic solder strip through rotation.
In an exemplary embodiment of the invention, the soaking mechanism is further provided with a lifting mechanism configured to adjust a relative position between the guiding device and a liquid level of the flux; the material supplementing mechanism is further provided with a lifting mechanism and is configured to adjust the relative position between the first rotating wheel and the liquid level of the soldering flux.
In an exemplary embodiment of the invention, the outer rim of the first runner has a flexible material, and the absorbent material is used for absorbing the flux.
In an exemplary embodiment of the invention, the first rotating wheel is a roller with a smooth periphery, and the adsorbing material is arranged on the outer edge of the roller; or the first rotating wheel is provided with convex rollers at intervals on the periphery, and the adsorbing material is arranged on the convex outer edge.
In an exemplary embodiment of the invention, the feeding mechanism further comprises a brush configured to brush one side of the photovoltaic solder ribbon from the first runner.
In an exemplary embodiment of the invention, the guiding means comprises a recessed portion for limiting, at least a partial area of the recessed portion being located below the level of the flux in the immersion tank.
In an exemplary embodiment of the invention, the guiding means comprises three sets, and at least a partial area of the groove portion of the guiding means of the middle set is located below the level of the soldering flux in the dipping tank.
In an exemplary embodiment of the invention, the coating apparatus further includes: and the drying mechanism is positioned between the soaking mechanism and the material supplementing mechanism and is configured to dry the photovoltaic welding strip from the soaking mechanism.
According to another aspect of the invention, there is also provided a photovoltaic solder strip flux coating method, comprising:
immersing two surfaces of the photovoltaic solder strip into the soldering flux;
removing the photovoltaic solder strip from the flux;
and supplementing the soldering flux to the lower surface of the photovoltaic solder strip, from which the soldering flux is removed, in a contact and/or splashing mode.
In an exemplary embodiment of the invention, the supplementing the flux to the lower surface of the flux-removed photovoltaic solder strip by means of contact and/or splashing comprises: and supplementing the soldering flux to the lower surface of the photovoltaic solder strip paved above the first rotating wheel in a contact and/or splashing mode by utilizing the rotation of the first rotating wheel partially positioned below the liquid level of the soldering flux.
In an exemplary embodiment of the invention, the lower surface of the photovoltaic solder strip is not in contact with the top of the first rotating wheel, and the first rotating wheel adheres the soldering flux to the lower surface of the photovoltaic solder strip in a splashing manner during rotation;
or the lower surface of the photovoltaic solder strip is in contact with the top of the first rotating wheel, and the first rotating wheel adheres the soldering flux to the photovoltaic solder strip in a contact mode or adheres the soldering flux to the photovoltaic solder strip in a contact and splashing combined action mode in the rotating process.
In an exemplary embodiment of the invention, the flux is uniformly adhered to the photovoltaic solder strip by a flexible material disposed on the outer edge of the first wheel while the lower surface of the photovoltaic solder strip is in contact with the top of the first wheel.
In an exemplary embodiment of the invention, the coating method further comprises: and uniformly brushing the scaling powder adhered to the lower surface of the welding strip through the first rotating wheel by using a brush.
In an exemplary embodiment of the invention, the coating method further comprises: and soaking two sides of the photovoltaic solder strip by using the soldering flux, drying the photovoltaic solder strip, and then supplementing the soldering flux to the lower surface of the photovoltaic solder strip.
The photovoltaic solder strip soldering flux coating device and the coating method firstly coat the soldering flux on both sides of the solder strip by using the soaking mechanism, and then additionally coat the soldering flux on the lower surface of the solder strip by using the feeding mechanism. The coating device and the coating method can effectively control the using amount of the soldering flux on the solder strip, can achieve the effect of reducing the amount of the soldering flux, compensate the reduction of the soldering flux caused by volatilization in the soldering box, adapt to the requirement of a subsequent soldering process, prevent the influence of the working environment on the soldering flux in the soldering process from causing over soldering or insufficient soldering, and improve the soldering quality; meanwhile, the coating device is simple in structure and low in production cost, and large-scale assembly line operation can be realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic view of a coating apparatus according to the present invention;
FIG. 2 is a schematic view of a soaking mechanism;
FIG. 3 is a schematic diagram of a first construction of a feed mechanism;
FIG. 4 is a schematic diagram of a second construction of the feed mechanism;
FIG. 5 is a schematic diagram of a third construction of a feed mechanism;
FIG. 6 is a schematic diagram of a fourth construction of a feed mechanism;
FIG. 7 is a schematic diagram of a fifth construction of a feed mechanism;
FIG. 8 is a schematic structural view of a coating apparatus with a drying mechanism;
FIG. 9 is a schematic diagram of a drying mechanism;
FIG. 10 is a flow chart of the coating method of the present invention.
In the figure, 1, a soaking mechanism; 2. a material supplementing mechanism; 3. welding a strip; 4. soldering flux; 5. a brush; 6. a drying mechanism; 11. a soaking box; 12. a groove roller; 121. a middle groove roller; 122. a left groove roller; 123. a groove roller on the right; 21. a material supplementing box; 22. a first runner; 61. an electric heating device; 62. a temperature control device; 63. a fan; 64. a temperature sensor.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
The embodiment of the invention provides a photovoltaic solder strip flux coating device, the solder strip is generally a tin-coated copper strip and can be a bus bar or an interconnecting strip, and the flux can be various organic, inorganic or resin fluxes, which are not listed herein.
The photovoltaic solder strip flux coating device of the embodiment of the invention comprises: the soaking mechanism is configured to immerse the photovoltaic welding strip in the soldering flux; the replenishment mechanism is configured to apply flux to one side of the photovoltaic solder strip from the soaking mechanism.
In the welding process, the upper surface of the photovoltaic welding strip is in contact with the back surface of the cell, the welding strip and the cell are tightly attached to the belt due to the vacuum system below the belt, scaling powder is not easy to volatilize in the whole welding process, excessive scaling powder causes the back surface of the cell to be over-welded, and therefore the upper surface of the welding strip only needs the design amount. And the solder strip lower surface contacts with the front of the battery piece, and in the welding process, the solder strip lower surface is exposed below the welding lamp fan, so that the soldering flux is volatilized faster due to high temperature and wind speed, effective components are reduced, the battery piece is subjected to front cold joint easily, and therefore the solder strip lower surface needs more soldering flux than preset soldering flux. By adopting the coating device, more soldering flux can be supplemented to one surface of the solder strip, the effect of less upper part and more lower part during soldering is achieved, the phenomenon of over-soldering or insufficient soldering caused by the loss of the soldering flux in the soldering process is prevented, and the soldering quality is improved. Meanwhile, the coating device is simple in structure and low in production cost, and large-scale assembly line operation can be realized.
The photovoltaic solder strip flux coating device according to the embodiment of the invention is described in detail below:
the photovoltaic solder strip flux coating device of the embodiment of the invention, as shown in fig. 1, comprises: the soaking mechanism 1 and the material supplementing mechanism 2; the soaking mechanism 1 comprises a soaking box 11 for containing soldering flux and a guiding device, wherein at least part of the guiding device is located in the soaking box 11, so that under the condition that the soldering flux is contained in the soaking box and at least the bottom of the guiding device is submerged by the soldering flux, the part of the photovoltaic solder strip located below the guiding device is submerged in the soldering flux.
When the soldering flux is soaked, the soldering strip 3 is laid firstly, so that two sides of the soldering strip 3 are positioned in the soldering flux under the guiding action of the guiding device, the soldering strip is soaked in the soldering flux, the soldering strip is moved, and the soldering strip sequentially passes through the soldering flux under the guiding action of the guiding device, and the upper surface and the lower surface of the soldering strip are completely soaked with the soldering flux.
In the dipping mechanism 1, the guide device is used to guide the solder ribbon 3 into the flux 4 in the dipping tank, but does not restrict the movement of the solder ribbon. The guiding device can be only fixed inside the soaking box, and also can be fixed on other mounting surfaces outside the soaking box. The guiding device may only play a role of guiding, for example, the structure may be a fixed disc or straight rod, etc., and the guiding may be realized by passing the welding strip around the bottom of the disc or straight rod. The guiding device can also have the function of guiding and can assist the movement of the welding strip, for example, the structure of the guiding device can be a rotatable roller or a rotating rod and the like, and when the welding strip bypasses the bottom of the roller or the rotating rod and moves along the first direction, the roller or the rotating rod synchronously rotates. The rotation of the roller or the rotating rod can be driven by another driving mechanism so as to drive the welding strip to move; the rotation of the roller or the rotating rod can also be synchronously driven by the friction of the welding strip.
In an exemplary embodiment of the invention, the guiding means may comprise a recessed portion for limiting, at least a partial area of the recessed portion being located below the level of the flux in the dipping tank. For example, the guiding device may be a grooved roller with grooves on the outer circumference, at least a part of the grooved roller 12 is located in the dipping tank 11, or may be located in the soldering flux, and the soldering ribbon 3 passes around the lower portion of the grooved roller 12 and enters the soldering flux 4. The direction and spacing can be realized to the area of welding accessible recess gyro wheel, prevent to weld the area and drop from guider at the removal in-process.
In another exemplary embodiment of the present invention, the guiding means may comprise three sets, which assist in the immersion of the solder strip. At least partial area of the groove part of the guide device in the middle group is positioned below the liquid level of the soldering flux in the soaking box. For example, when the guiding device is a grooved roller, as shown in fig. 2, the grooved roller includes three groups, and the three groups of grooved rollers are arranged along the horizontal direction, and the axes of all the grooved rollers are perpendicular to the first direction. At least partial area of the middle grooved roller 121 is located in the soldering flux 4, and the highest points of the left grooved roller 122 and the right grooved roller 123 are located outside the soldering flux 4 and higher than the highest points of the middle group of grooved rollers 121. The welding strip 3 sequentially bypasses the top of the left groove roller 122, the bottom of the middle groove roller 121 and the top of the right groove roller 123, and is favorable for supporting, driving and soaking the welding strip. The left grooved roller 122 and the right grooved roller 123 may be partially positioned in the flux or may not contact the flux at all, as long as both ends of the solder strip can be raised.
And the material supplementing mechanism 2 is used for coating the scaling powder on one side of the photovoltaic solder strip from the soaking mechanism. The material supplementing mechanism 2 and the soaking mechanism are arranged along a first direction; a supplement box 21 for containing soldering flux and a first rotating wheel 22, wherein a part of the first rotating wheel 22 is positioned below the liquid level of the soldering flux in the supplement box 21, the first rotating wheel coats the soldering flux in the supplement box on one side of the photovoltaic solder strip through rotation, and the axis of the first rotating wheel 22 is perpendicular to the first direction.
During material supplementing, the welding strip 3 is laid above the first rotating wheel 22, the lower surface of the welding strip is over the top of the first rotating wheel except the soldering flux, and the lower part of the first rotating wheel 22 is located in the soldering flux, so that the soldering flux carried by the first rotating wheel 22 can be transferred to the lower surface of the welding strip 3 in the rotating process. The transfer mode can be at least one of splashing, contact (scraping) and the like or the combined action of a plurality of modes.
In the feeding mechanism, the first roller 22 mainly functions to transfer the flux, and the first roller includes, but is not limited to, a roller, for example, a roller with a smooth periphery, as shown in fig. 3, or a roller with protrusions distributed at intervals on the periphery, such as a gear, a ratchet, etc., as shown in fig. 4. According to different structures, the first rotating wheel 22 transfers the flux carried by the first rotating wheel to the lower surface of the solder strip 3 in at least one of splashing, contacting (scraping) and the like in the rotating process.
Depending on the contacting relationship of the solder ribbon 3 with the first wheel 22, the first wheel may apply flux in an adhering and/or splashing manner to the solder ribbon. When the lower surface of the welding strip is not in contact with the top of the first rotating wheel, the first rotating wheel adheres the soldering flux to the lower surface of the welding strip through splashing in the rotating process; when the lower surface of the welding strip is contacted with the top of the first rotating wheel, the first rotating wheel adheres the soldering flux on the welding strip through contact in the rotating process, or adheres the soldering flux on the welding strip through the combined action of contact and splashing. In addition, when the first wheel 22 is a smooth-circumference roller, it is often difficult to splash flux off the first wheel, which typically requires contact with the solder ribbon to apply the flux in contact to the solder ribbon. When first runner 22 has bellied gyro wheel for periphery interval distribution, it can realize getting rid of spatter, therefore it both can with weld the area contact, also can not contact.
The rotation of the first wheel 22 can be driven by a driving device or by friction between the welding strip and the first wheel during its movement. When the driving device drives, the rotating speed of the first rotating wheel can be the same as the moving speed of the welding strip and can also be different, and when the rotating speed of the first rotating wheel is larger, the flux is thrown to the lower surface of the welding strip through centrifugal force.
The soaking mechanism and the material supplementing mechanism can be arranged along the moving direction of the welding strip. For example, as shown in fig. 1, the grooved roller 12 and the first roller 22 are disposed side by side along a horizontal direction (a first direction), and the axes of the grooved roller 12 and the first roller are perpendicular to the first direction, so that the solder strip can be linearly conveyed, and the solder strip can be conveniently coated. The grooved rollers 12 and the first roller 22 may be mounted in respective housings by brackets, for example, fixed to the inner walls of the respective housings by shafts passing through the centers of the rollers. The two can drive its rotation through the removal of solder strip, also can independently control its rotation through other control mechanism. The groove roller can guide the welding strip, prevent the welding strip from falling, actively or passively rotate, and facilitate the movement of the welding strip.
In an exemplary embodiment of the present invention, each group of grooved rollers 12 or the first rotating wheel 22 may include a plurality of rollers, for example, referring to fig. 1, each group of grooved rollers 12 includes four rollers, each group of first rotating wheels 22 also includes four rollers, and each group of four grooved rollers 12 and four first rotating wheels 22 are arranged in a one-to-one correspondence along a horizontal line (a first direction). Therefore, the coating of a plurality of welding strips can be carried out at one time, and the coating efficiency of the scaling powder is greatly improved. Of course, it will be understood by those skilled in the art that the number of each group of wheels may be other positive integers, and the invention is not limited thereto.
In order to ensure that the welding strip can be soaked or supplemented with the soldering flux all the time, in an exemplary embodiment of the invention, the guide device is arranged in a lifting mechanism (not shown in the figure), the lifting mechanism can adjust the relative position between the guide device and the liquid level of the soldering flux, the first rotating wheel is also arranged in the lifting mechanism, and the lifting mechanism can adjust the relative position between the first rotating wheel and the liquid level of the soldering flux. The guide device and the first rotating wheel can be jointly arranged on a lifting mechanism, and can also be independently arranged on respective lifting mechanisms. The lifting mechanism includes, but is not limited to, a screw lifting mechanism, a hydraulic or pneumatic piston lifting mechanism, etc., and may be a manual lifting mechanism or an automatic lifting mechanism, which is not limited in the present invention.
Since the first rotating wheel 22 applies the flux to the solder ribbon 3 by means of contact adhesion, splash, and the like, uneven application may occur. In order to ensure that the supplementary soldering flux on the lower surface of the solder strip can be uniformly coated, in the exemplary embodiment of the invention, the outer edge of the first rotating wheel 22 is coated with the flexible material 23, such as sponge, gauze, silica gel, rubber and the like, the flexible material can carry a certain amount of soldering flux in the rotating process of the rotating wheel, when the flexible material contacts the surface of the solder strip 3, the soldering flux can be coated on the lower surface of the solder strip, and the lower surface of the solder strip can be extruded, so that the coated soldering flux is uniformly distributed, the coating quality is improved, and the subsequent welding quality is further ensured.
In an exemplary embodiment of the present invention, when the first roller 22 is a roller with a smooth outer circumference, the flexible material 23 is wrapped around the outer edge of the roller, as shown in fig. 5; when the first roller 22 is a roller (e.g. a gear) with protrusions distributed at intervals on the outer periphery, the flexible material is wrapped on the outer edge of the protrusions, as shown in fig. 6. The flexible material and the roller can be fixed by sticking, riveting and the like.
When the first rotating wheel 22 is a roller with protrusions distributed at intervals on the periphery, if the rotating speed is too low to throw up the soldering flux, the first rotating wheel only performs transfer coating of the soldering flux by contact, and at this time, the phenomenon that the lower side of the soldering strip can only perform interval coating, that is, the soldering flux cannot be coated in the middle of the two protrusions, so that the coating is uneven, may occur. Or the roller can be coated in a splashing mode, but the splashing position is difficult to accurately control, and the phenomenon of uneven coating can also be caused. In the exemplary embodiment of the present invention, as shown in fig. 7, a brush 5 is further provided on the first rotating wheel 22 side of the feeding mechanism, the brush 5 is located on the first rotating wheel in the advancing direction of the welding strip, the bristles of the brush 5 are upward, and the top ends of the bristles are flush with the top end of the first rotating wheel. The welding strip 3 passing through the first rotating wheel moves to the position above the brush 5, uneven soldering flux is uniformly brushed by the brush, and the condition that the flux is unevenly coated at intervals can be avoided.
In the exemplary embodiment, the photovoltaic solder strip flux coating apparatus further includes a drying mechanism 6 for drying the solder strip, which is arranged along the horizontal direction (the first direction) with the soaking mechanism 1 and the feeding mechanism 2 and located between the soaking mechanism 1 and the feeding mechanism 2. As shown in fig. 8, after the solder strip 3 is soaked with the coating agent, the coating agent on the surface is dried by the drying mechanism 6, and then enters the supplementary material mechanism 2 for secondary coating, so that on one hand, the coating agent after drying can be effectively coated with the next layer of coating agent, on the other hand, a dry-on-wet-off form can be directly formed after secondary coating, and the form can be fed into the welding process to compensate the influence of the welding process on the coating agent. The welding lamp fan provides hot air from top to bottom for welding, and because the upper surface of the welding belt contacts the back of the battery piece, the dry scaling powder is not easy to volatilize, and the welding quality of the back of the battery piece can be ensured. And the lower surface of the solder strip is contacted with the front surface of the battery piece, the lower surface of the solder strip is exposed below a fan of a welding lamp, the liquid soldering flux has to volatilize a part due to high temperature and wind speed, but the soldering flux can be remained in a sufficient amount due to secondary coating.
As shown in fig. 8, the drying mechanism 6 adopts hot air with a downward opening to dry, which can ensure sufficient drying of the surface of the welding strip and does not affect the quality of the welding strip. The drying mechanism 6 may employ an air dryer, as shown in fig. 9, which includes an electric heating device 61, a temperature control device 62, and a fan 63, the electric heating device 61 being configured to heat air supplied from the fan 63 to dry the welding strip 3, and the temperature control device 62 being configured to adjust a drying temperature. Further, a temperature sensor 64 may be installed in the air dryer to monitor the drying temperature in real time.
The embodiment of the invention also provides a photovoltaic solder strip flux coating method, taking the coating device in the above exemplary embodiment as an example, referring to fig. 10, the method may include the following steps:
step S110, immersing two surfaces of the photovoltaic solder strip into soldering flux;
step S210, removing the photovoltaic solder strip from the soldering flux;
step S410, supplementing the soldering flux to the lower surface of the photovoltaic solder strip with the soldering flux removed out in a contact and/or splashing mode
In step S110, when the solder strip is laid on the guiding device, the specific manner thereof is different according to the structure of the guiding device, and the specific manner can be described with reference to the coating device. For example, when the guide means is a grooved roller, the solder strip is caused to bypass the grooved roller in the region of the grooves in the immersion tank and the lower surface of the solder strip is caused to lie above the top of the first roller. And then moving the solder strip to immerse the two sides of the solder strip in the soldering flux in the soaking box. No matter what type of laying mode is adopted, the two sides of the welding strip can be soaked by the scaling powder, and the details are not repeated.
In step S410, the flux can be supplemented to the lower surface of the photovoltaic solder strip laid above the first rotating wheel by contacting and/or splashing by using the rotation of the first rotating wheel partially located below the flux liquid level. The first rotating wheel is driven to rotate, and the soldering flux in the material supplementing box is adhered to the lower surface of the moving welding strip in a contact and/or splashing mode by the rotating first rotating wheel so as to supplement the material to the lower surface of the welding strip.
When the welding strip is laid at the material supplementing device, the first rotating wheel and the welding strip can be in contact or not in contact. Step 410 may thus include:
when the lower surface of the welding strip is not in contact with the top of the first rotating wheel, the first rotating wheel adheres the soldering flux to the lower surface of the welding strip in a splashing mode in the rotating process.
When the lower surface of the solder strip contacts with the top of the first rotating wheel, the first rotating wheel adheres the soldering flux on the photovoltaic solder strip in a contact mode or adheres the soldering flux on the photovoltaic solder strip in a contact and splashing combined action mode in the rotating process.
In order to uniformly coat the supplemented flux on the lower surface of the solder strip, in step S310, the flux can be uniformly adhered to the photovoltaic solder strip by using a flexible material arranged on the outer edge of the first rotating wheel.
In order to further make the flux coating uniform, the coating method of the present embodiment may further include:
and step S510, uniformly brushing the soldering flux adhered to the lower surface of the solder strip by the first rotating wheel by using a brush.
In order to achieve the effect of drying the upper part and wetting the lower part of the soldering flux on the solder strip and further improve the soldering quality, the coating method of the embodiment may further include:
and step S310, soaking two sides of the welding strip by the soldering flux, drying the welding strip, and then supplementing materials to the lower surface of the welding strip.
The devices involved in the above embodiments can refer to the corresponding descriptions at the coating device of the present invention, and are not described herein again.
By the coating method, more soldering flux can be supplemented below the solder strip, the effect of more soldering flux at the upper part and the lower part is achieved, the solder strip passing through the coating device is conveyed to a soldering site for soldering, the soldering flux loss in the soldering process can be prevented from causing over soldering or insufficient soldering, and the soldering quality is improved. Meanwhile, the coating method is easy to realize and can realize large-scale assembly line operation.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (16)
1. The utility model provides a photovoltaic solder strip scaling powder coating device which characterized in that includes:
a soaking mechanism configured to immerse the photovoltaic solder strip in flux;
a feeding mechanism configured to apply flux to one side of the photovoltaic solder strip from the soaking mechanism.
2. The solder ribbon flux coating apparatus of claim 1,
the soaking mechanism comprises a soaking box for containing soldering flux and a guiding device, wherein the guiding device is at least partially positioned in the soaking box, so that under the condition that the soldering flux is contained in the soaking box and at least the bottom of the guiding device is submerged by the soldering flux, the part of the photovoltaic solder strip, which is positioned below the guiding device, is submerged in the soldering flux.
3. The solder ribbon flux coating apparatus of claim 1,
the material supplementing mechanism comprises a material supplementing box used for containing soldering flux and a first rotating wheel, wherein a part of the first rotating wheel is located below the liquid level of the soldering flux in the material supplementing box, and the first rotating wheel is configured to coat the soldering flux in the material supplementing box on one side of the photovoltaic solder strip through rotation.
4. The solder ribbon flux coating apparatus of claim 2 or 3,
the soaking mechanism is further provided with a lifting mechanism, and the lifting mechanism is configured to adjust the relative position between the guide device and the liquid level of the soldering flux;
the material supplementing mechanism is further provided with a lifting mechanism and is configured to adjust the relative position between the first rotating wheel and the liquid level of the soldering flux.
5. The solder ribbon flux coating apparatus of claim 4, wherein the outer periphery of the first wheel comprises a compliant material that is configured to absorb the flux.
6. The device for coating the soldering flux on the photovoltaic solder strip according to claim 5, wherein the first rotating wheel is a roller with a smooth periphery, and the adsorbing material is arranged on the outer edge of the roller; or the first rotating wheel is provided with convex rollers at intervals on the periphery, and the adsorbing material is arranged on the convex outer edge.
7. The photovoltaic solder ribbon flux coating apparatus of claim 6, wherein the replenishment mechanism further comprises a brush configured to brush a side of the photovoltaic solder ribbon from the first wheel.
8. The solder ribbon flux coating apparatus of claim 2, wherein the guiding means comprises a recessed portion for limiting, at least a partial area of the recessed portion being located below a level of flux in the soak tank.
9. The solder ribbon flux coating apparatus of claim 8, wherein the guides comprise three sets, at least a portion of the recessed portion of the guide in the middle set being located below the level of flux in the dip tank.
10. The solder ribbon flux coating apparatus of any one of claims 1-9, further comprising:
and the drying mechanism is positioned between the soaking mechanism and the material supplementing mechanism and is configured to dry the photovoltaic welding strip from the soaking mechanism.
11. A photovoltaic solder strip flux coating method is characterized by comprising the following steps:
immersing two surfaces of the photovoltaic solder strip into the soldering flux;
removing the photovoltaic solder strip from the flux;
and supplementing the soldering flux to the lower surface of the photovoltaic solder strip, from which the soldering flux is removed, in a contact and/or splashing mode.
12. The method of claim 11, wherein the replenishing flux to the lower surface of the flux removed photovoltaic solder strip by contact and/or splashing comprises:
and supplementing the soldering flux to the lower surface of the photovoltaic solder strip paved above the first rotating wheel in a contact and/or splashing mode by utilizing the rotation of the first rotating wheel partially positioned below the liquid level of the soldering flux.
13. The method as claimed in claim 12, wherein the lower surface of the photovoltaic solder ribbon is not in contact with the top of the first wheel, and the first wheel adheres the flux to the lower surface of the photovoltaic solder ribbon by splashing during rotation;
or the lower surface of the photovoltaic solder strip is in contact with the top of the first rotating wheel, and the first rotating wheel adheres the soldering flux to the photovoltaic solder strip in a contact mode or adheres the soldering flux to the photovoltaic solder strip in a contact and splashing combined action mode in the rotating process.
14. The method of claim 13, wherein the flux adheres uniformly to the photovoltaic solder ribbon by a compliant material disposed around an outer edge of the first roller while the lower surface of the photovoltaic solder ribbon is in contact with the top of the first roller.
15. The method of solder ribbon flux coating of claim 14, further comprising:
and uniformly brushing the scaling powder adhered to the lower surface of the welding strip through the first rotating wheel by using a brush.
16. The method of solder ribbon flux coating of any one of claims 11-15, further comprising:
and soaking two sides of the photovoltaic solder strip by using the soldering flux, drying the photovoltaic solder strip, and then supplementing the soldering flux to the lower surface of the photovoltaic solder strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811223585.8A CN111068977A (en) | 2018-10-19 | 2018-10-19 | Photovoltaic solder strip soldering flux coating device and coating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811223585.8A CN111068977A (en) | 2018-10-19 | 2018-10-19 | Photovoltaic solder strip soldering flux coating device and coating method |
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| CN111068977A true CN111068977A (en) | 2020-04-28 |
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| CN201811223585.8A Pending CN111068977A (en) | 2018-10-19 | 2018-10-19 | Photovoltaic solder strip soldering flux coating device and coating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155933A (en) * | 2022-07-14 | 2022-10-11 | 润达光伏盐城有限公司 | Waist-shaped welding strip straightening and coating device for photovoltaic module production |
-
2018
- 2018-10-19 CN CN201811223585.8A patent/CN111068977A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155933A (en) * | 2022-07-14 | 2022-10-11 | 润达光伏盐城有限公司 | Waist-shaped welding strip straightening and coating device for photovoltaic module production |
| CN115155933B (en) * | 2022-07-14 | 2023-06-09 | 润达光伏盐城有限公司 | Waist-shaped welding strip straightening and coating device for photovoltaic module production |
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Effective date of registration: 20221123 Address after: 510670 room 229, annex building, No. 111, Kexue Avenue, Huangpu District, Guangzhou City, Guangdong Province (office only) Applicant after: Hanwa Technology Co.,Ltd. Address before: No. 2002, Konggang 4th Road, Shuangliu District, Chengdu, Sichuan 610200 Applicant before: CHENGDU DONGTENG FILM SOLAR Co.,Ltd. |