CN217863241U - Solar cell screen printing device - Google Patents
Solar cell screen printing device Download PDFInfo
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- CN217863241U CN217863241U CN202122227115.2U CN202122227115U CN217863241U CN 217863241 U CN217863241 U CN 217863241U CN 202122227115 U CN202122227115 U CN 202122227115U CN 217863241 U CN217863241 U CN 217863241U
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Abstract
The utility model is suitable for a solar cell and otter board printing field provide a solar cell screen printing device, solar cell screen printing device includes: the printing platform is positioned above the base and used for placing the battery; a screen plate is arranged right above the printing platform, and a scraper is arranged above the screen plate; the adjusting device and the control device connected with the adjusting device. The screen plate interval is controlled to be gradually reduced through the first stroke of the solar cell printing, and the screen plate interval is controlled to be gradually increased through the third stroke, so that the problem that grid lines are not uniform at the edge of the existing screen printing is solved, the screen plate interval is kept unchanged in the second stroke of the middle solar cell printing, and the screen plate intervals of the first stroke and the third stroke are both larger than the screen plate interval of the second stroke.
Description
Technical Field
The utility model belongs to solar cell and screen printing field especially relate to a solar cell screen printing device.
Background
In the photovoltaic industry, the cost of screen printed pastes has been an expenditure of over 30% of the cost of photovoltaic cell sheet preparation. Therefore, how to reduce the consumption of the screen and the slurry under the condition of ensuring the printing quality and the conversion efficiency becomes a key factor of important cost reduction.
The traditional printing mode adopts a scheme of fixing the screen space (the screen space is the height between the screen and the printing platform) for printing. For example, H1, H2, and H3 in fig. 1 each indicate a screen pitch, H1 indicates a screen pitch at a start position, H2 indicates a screen pitch at a middle position in solar cell printing, and H3 indicates a screen pitch at a take-up position. In the prior art, the screen spacing in the whole printing process is the same, and in such a printing mode, the printing grid line at the edge is close to the screen frame at the starting position and the cutting-up position of the scraper, and the parameter of the screen spacing is different from the deformation amount of printing and the position in the middle of printing caused by the position where the edge is close to the fixed point of the screen, so that the width ratio of the fine grid line closest to the edge of the screen on the battery is required to be standard wide, and abnormal or bad printing of the solar battery can be often caused.
Therefore, in the current printing mode, the screen pitches are all at the same height from the printing starting position to the printing ending position, and the uniformity of the width of the printed grid line cannot be ensured. To solve this problem, it is often necessary to increase the screen pitch, which in turn leads to a problem of an increase in the grammage of the printing paste due to the increase in the screen pitch.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a solar cell screen printing device aims at solving current screen printing and has the problem that can't guarantee that the grid line width is even to and improve the problem that the thick liquids grammes per square metre that the otter board interval brought increases.
The embodiment of the utility model provides a realize like this, provide a solar cell screen printing device, solar cell screen printing device includes:
the printing platform is positioned above the base and used for placing the battery;
a screen plate is arranged right above the printing platform, and a scraper is arranged above the screen plate; the position of the screen plate where the printing forward stroke of the scraper starts is a starting position, and the position of the screen plate where the printing forward stroke of the scraper finishes is a cutter retracting position; a first position and a second position are arranged between the starting edge of the solar cell printing and the ending edge of the solar cell printing, wherein the first position is close to the starting edge, and the second position is close to the ending edge; the solar cell printing run comprises: a first stroke of the starting edge to the first position, a second stroke of the first position to the second position, and a third stroke of the second position to the ending edge;
the adjusting device is used for adjusting the distance between the screen plates, and the distance between the screen plates is the distance between the screen plates and the printing platform;
the control device is connected with the adjusting device and is used for controlling the space between the screens to be gradually reduced in a first stroke of solar cell printing, keeping the space between the screens to be unchanged in a second stroke and controlling the space between the screens to be gradually increased in a third stroke;
the mesh plate interval of the first stroke and the mesh plate interval of the third stroke are both larger than the mesh plate interval of the second stroke.
Further, the control device is further configured to control the mesh plate spacing to remain unchanged from the start position to the start edge, and control the mesh plate spacing to remain unchanged from the end edge to the retracting position, where the mesh plate spacing of the start position is the same as the mesh plate spacing of the retracting position.
Further, the first stroke and the third stroke are equally spaced; and/or the ratio of the interval of the first stroke to the interval of the total printing stroke of the solar cell is 2-5%.
Furthermore, the mesh plate spacing of the starting position and the retracting position is equal; and/or the ratio of the distance from the starting position to the starting edge to the distance of the total stroke of the solar cell printing is 3-20%.
Further, the control device controls the screen plate spacing to linearly decrease in the first stroke and controls the screen plate spacing to linearly increase in the third stroke, and the slope of the linear decrease of the screen plate spacing is the same as the slope of the linear increase of the screen plate spacing.
Furthermore, the adjusting device comprises a first lead screw slider module and a second lead screw slider module which are arranged on the base and located on two sides of the screen plate, a first connecting piece used for being fixedly connected with one side of the screen plate is arranged on the first lead screw slider module, a second connecting piece used for being fixedly connected with the other side of the screen plate is arranged on the second lead screw slider module, and the first lead screw slider module and the second lead screw slider module move simultaneously to drive the screen plate to move in the vertical direction.
Furthermore, the first lead screw slider module comprises a first lead screw bracket, a first screw rod positioned on the first lead screw bracket, and a first motor driving the first screw rod to move in the vertical direction.
Furthermore, the first connecting piece comprises a first connecting block connected with the first screw rod, fixed blocks used for fixing the screen plate are arranged on two sides of the first connecting block, a guide sliding block is arranged on each fixed block, and a guide sliding rail matched with the guide sliding block is arranged on the first lead screw support.
Furthermore, the adjusting device comprises a second screw rod support, a second screw rod located on the second screw rod support, and a second motor driving the second screw rod to move up and down in the vertical direction, the printing platform is fixedly connected to the second screw rod, and the second motor drives the printing platform to move up and down in the vertical direction.
Furthermore, the adjusting device further comprises a linear slide rail moving along the horizontal direction, a second slide block moving along the linear slide rail is arranged on the linear slide rail, and the second slide block is fixedly connected with the second lead screw support and used for driving the printing platform to move along the horizontal direction.
The utility model discloses solar cell screen printing device, first stroke control otter board interval through printing at solar cell progressively reduces, and progressively risees at third stroke control otter board interval, the inhomogeneous problem of grid line can appear at having solved current screen printing edge, and keep otter board interval unchangeable in the second stroke of middle solar cell printing, and the otter board interval of first stroke and third stroke all is greater than the otter board interval of second stroke all, for the scheme of current improvement otter board interval, the gram weight of printing thick liquids has been reduced, the problem that the thick liquids gram weight that the current improvement otter board interval brought increases has been solved.
Drawings
Fig. 1 is a schematic diagram illustrating a screen pitch change of a solar cell screen printing apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a fifth embodiment of a screen printing apparatus for solar cells according to an embodiment of the present invention;
fig. 3 is another schematic structural diagram of a fifth embodiment of a solar cell screen printing apparatus according to an embodiment of the present invention;
fig. 4 is a rear view of a fifth embodiment of a solar cell screen printing apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a solar cell screen printing apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a sixth embodiment of a solar cell screen printing apparatus according to the present invention;
fig. 7 is another schematic structural diagram of a sixth embodiment of a screen printing apparatus for a solar cell according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating a screen pitch variation curve of a screen printing apparatus for solar cells according to an embodiment of the present invention;
fig. 9 is a schematic diagram illustrating a screen pitch change curve of a screen printing apparatus for solar cells according to an embodiment of the present invention.
Description of the reference numerals
1. A base; 2. printing a guide rail;
10. a screen plate; 11. a first connection block; 12. a fixed block; 13. a guide slider;
20. a printing platform; 21. a solar cell;
31. a second lead screw bracket; 32. a second motor; 33. a second screw;
40. a linear slide rail; 41. a slider;
50. a first lead screw slider module; 51. a first lead screw bracket; 52. a first screw; 53. a first motor; 54. a guide slide rail;
60. and the second screw rod sliding block module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides a solar cell screen printing device, first stroke control otter board interval through printing at solar cell progressively reduces, and progressively risees at third stroke control otter board interval, the inhomogeneous problem of grid line can appear at the current screen printing edge of having solved, and keep the otter board interval unchangeable in the second stroke of middle solar cell printing, and the otter board interval of first stroke and third stroke all is greater than the otter board interval of second stroke, for the scheme of current improvement otter board interval, the gram weight of printing thick liquids has been reduced, the problem that the thick liquids gram weight that the current improvement otter board interval brought increases has been solved.
Example one
As shown in fig. 1, the present embodiment provides a solar cell screen printing apparatus including a base 1, the base 1 being provided with a printing table 20 for placing a battery 21; a screen plate 10 is arranged right above the printing platform 20, and a scraper is arranged above the screen plate 10; the position of the screen 10 where the printing forward stroke of the scraper starts is a starting position, and the position of the screen 10 where the printing forward stroke of the scraper ends is a cutter retracting position; a first position and a second position are arranged between the starting edge of the solar cell printing and the ending edge of the solar cell printing, wherein the first position is close to the starting edge, and the second position is close to the ending edge; the solar cell printing process comprises the following steps: a first stroke from the starting edge to the first position, a second stroke from the first position to the second position, and a third stroke from the second position to the ending edge; the adjusting device is used for adjusting the distance between the screen plates, and the distance between the screen plates is the distance between the screen plates and the printing platform; the control device is connected with the adjusting device and used for controlling the distance between the screens to be gradually reduced in a first stroke of solar cell printing, controlling the distance between the screens to be kept unchanged in a second stroke and controlling the distance between the screens to be gradually increased in a third stroke; the mesh plate interval of the first stroke and the mesh plate interval of the third stroke are both larger than the mesh plate interval of the second stroke.
Referring to fig. 1, in this embodiment, the start position of the squeegee corresponds to P1, the retracting position of the squeegee corresponds to P3, the middle position of the solar cell printing corresponds to P2, the start edge of the solar cell printing corresponds to P4, the end edge of the solar cell printing corresponds to P7, the first position corresponds to P5, and the second position corresponds to P6.
The whole printing process is from P1 to P3, and specifically includes a start position P1 of the squeegee to a start edge P4 (i.e., P1-P4) of the solar cell printing, a process (P4-P7) of the solar cell printing, and an end edge P7 to a cutting position P3 (i.e., P7-P3) of the squeegee. The solar cell printing process is from the beginning edge P4 of the solar cell printing to the ending edge P7 of the solar cell printing; including a first stroke (P4-P5), a second stroke (P5-P6), and a third stroke (P6-P7).
In the process of printing the solar cell in the embodiment, the first process controls the pitch of the screen to be gradually reduced, the second process controls the pitch of the screen to be kept unchanged, and the third process controls the pitch of the screen to be gradually increased. And the mesh plate spacing of the first stroke and the third stroke is larger than that of the second stroke.
In this embodiment, the control device is a PLC controller, and the PLC controller stores a preset adjustment rule of the screen pitch, and can adjust a PLC control program according to the printing requirement, so as to dynamically adjust the screen pitch during the printing process of the scraper on the screen 10.
The solar cell screen printing device of the embodiment controls the screen plate interval to be gradually reduced through the first stroke of the solar cell printing, and controls the screen plate interval to be gradually increased through the third stroke, because the screen plate interval is increased, the screen printing deformation is large, the rebound effect is better, meanwhile, the line width is relatively thin, the problem that grid lines are not uniform at the edge of the existing screen printing is solved, the screen plate interval is kept unchanged in the second stroke of the middle solar cell printing, and the screen plate intervals of the first stroke and the third stroke are larger than the screen plate interval of the second stroke. Consequently, this application has both solved the inhomogeneous problem of grid line appears in the printing edge, has solved the problem that thick liquids grammes per square metre increases again. The solar screen printing device of the embodiment improves the printing efficiency of the cell on one hand, and reduces the loss of the slurry on the other hand.
Example two
On the basis of the first embodiment, the present embodiment provides a solar cell screen printing apparatus, wherein the control device is further configured to control the screen pitch to be kept unchanged from the start position to the start edge, and to control the screen pitch to be kept unchanged from the end edge to the take-up position, and the screen pitch of the start position is the same as the screen pitch of the take-up position.
In this embodiment, the distance between the mesh plates at the starting position P1 of the scraper is H1, the distance between the mesh plates at the retracting position P3 of the scraper is H3, and the distances between the mesh plates at the first position H5 and the second position H6 are both H2.
During the printing process of the positive direction of the scraper, the screen pitch H1 is kept unchanged during the printing process of the starting positions P1 to P4 of the scraper, namely the screen pitch H1 of the starting edge P4 of the solar cell printing. And in the printing process from the end P7 of the solar cell printing to the retracting position P3 of the scraper, the screen pitch H3 is kept unchanged, namely the screen pitch of the end edge P7 of the solar cell printing is H3. And H1 and H3 are the same. H1 is larger than H2, and H1 is respectively larger than the screen plate spacing of the first stroke, the second stroke and the third stroke.
The solar cell screen printing device of this embodiment, through the beginning edge at the initiating terminal to solar cell printing, and the printing stroke of the end edge of solar cell printing to receipts sword position, all keep the otter board interval unchangeable, for the otter board interval of solar cell printing stroke, the otter board interval of initiating terminal and receipts sword position has been improved, because the otter board interval is too little, pressure is great, the scraper degree of depth is dark will lead to deckle edge problem, and the printing device of this embodiment has improved the otter board interval of initiating terminal and receipts target, pressure is less relatively, solar cell printing edge's deckle edge problem has been solved, solar cell printing's efficiency has further been improved.
EXAMPLE III
Referring to fig. 7, on the basis of the first or second embodiment, the present embodiment provides a solar cell screen printing apparatus, wherein the first stroke and the third stroke have equal intervals; the ratio of the pitch of the first stroke to the pitch of the total solar cell printing stroke is 2-5%.
In this embodiment, the pitch of the total solar cell printing stroke includes the sum of the pitches of the first stroke, the second stroke and the third stroke, i.e., the pitch from P4 to P7, which is denoted as P4-P7.
In the present embodiment, the pitches P4 to P5 are the same as the pitches P6 to P7. Wherein the spacing between P4 and P5 is designated as P4-P5 and the spacing between P6 and P7 is designated as P6-P7. In the embodiment, the distances between P4-P5 and P6-P7 are the same, so that the printing uniformity is ensured, the size is reduced, the control program is simple and reliable, the equipment structure is simpler and more convenient, and the cost is reduced.
Referring to fig. 1, the pitch of the first stroke is denoted as: P4-P5; the total printing stroke interval of the solar cell is recorded as follows: P4-P7; the ratio of the first stroke interval to the total solar cell printing stroke interval is 2% -5%, namely the ratio of P4-P5/P4-P7 is 2% -5%. Through experimental analysis, the proportion of the distance from the starting edge P4 to the first position P5 of the solar cell printing to the stroke distance of the solar cell printing is 3%, and at the moment, the grid lines at the solar cell printing edge can be ensured to be uniform, and the loss of the slurry is low. It is understood that the ratio of P6-P7/P4-P7 is 2% -5%.
The proportion is an empirical model, when printing is carried out by using a printing mode with the same height all the time, the width of a printing start cutter position and a printing retraction cutter position is obviously wider within 3mm of a first grid line, but the printing start cutter position and the printing retraction cutter position are sharply reduced to an average line after 4-5 mm. The first grid line is generally 2mm away from the edge of the silicon chip, so that the range of 2-5% is given according to measurement.
Furthermore, the mesh plate spacing of the start position and the cutter retracting position is equal; the ratio of the stroke distance from the starting position to the starting edge to the total stroke distance of the solar cell printing is 3-20%.
In the embodiment, the distance from the start point P1 to the start edge P4 of the solar cell printing is denoted as P1-P4, wherein the ratio of P1-P4/P4-P7 is 3% -20%. Through experimental analysis, the ratio of the distance between the start position P1 of the scraper and the starting edge P4 of the solar cell printing to the stroke distance of the whole solar cell printing is 10%, so that burrs at the printing edge of the solar cell can be greatly reduced, and the yield of the solar cell printing is improved. It is understood that the ratio P7-P3/P4-P7 is 3% -20%.
The proportion is an empirical model, and when the printing mode with the same height is used for printing, the burr problem appears in the range of 3mm of the first grid line at the cutter starting position and the cutter closing position in the printing mode, but the burr problem disappears gradually after 5-6 mm. The first grid line is generally 2mm away from the edge of the silicon chip, so that the range of 3-20% is given according to measurement.
The solar cell printing device of this embodiment, through the proportional relation between the stroke interval of setting for the interval of first stroke and third stroke and solar cell printing, and the proportional relation between the interval between the starting position of scraper and the beginning edge of solar cell printing and the whole stroke of solar cell printing, can be effectual solve the inhomogeneous and thick liquids grammes per square metre of solar cell printing grid line and increase, and effectively solved the deckle edge problem at solar cell printing edge, the yield of solar cell printing has been improved.
Example four
On the basis of the third embodiment, the present embodiment provides a solar cell screen printing apparatus, wherein the control device controls the screen pitch to decrease linearly in the first stroke, controls the screen pitch to increase linearly in the third stroke, and has the same slope of linear decrease of the screen pitch as the slope of linear increase of the screen pitch.
Referring to fig. 8, in the present embodiment, the screen pitch decreases linearly from the starting edge P4 of the solar cell printing to the first position P5. Wherein, the mesh plate interval of P4 is H1, and the mesh plate interval of the first position P5 is H2. Specifically, let the P4-P5 pitch be X1, Y1= H1-H2=0.1-1.5mm, and the printing speed be S. At this time, Y1= aX1/S, and a, i.e., the slope of linear decrease in the screen pitch, can be obtained when the printing speed, X1, and Y1 are determined. From the slope, a linear function of the change in the screen pitch at the first stroke can be obtained, for example: y = aX. The linear function curve is obtained according to the variation trend of the mesh plate spacing corresponding to points in different strokes, so that the adjustment range and amplitude of the mesh plate spacing variation in different strokes can be obtained according to the linear function of the mesh plate spacing variation.
Experiments show that when the difference between the screen plate spacing at the initial edge and the first position is 0.5mm, the grid lines at the edge are uniform, and the gram weight of the slurry can be reduced by about 5-15%. And obtaining the range of the difference value of the screen spacing between the starting edge and the first position according to the experimental measurement.
It will be appreciated that in the second position P6, at the end edge P7 of the solar cell print, the screen pitch increases linearly. The screen pitch of the second position P6 is H1, and the screen pitch of the end edge P7 of the solar cell printing is H2. Specifically, let the P6-P7 pitch be X2, Y2= H1-H2=0.1-1.5mm, and the printing speed be S. At this time, Y2= bX2/S, and when the printing speed, X2, and Y2 are determined, b, i.e., the slope of the linear rise of the screen pitch, can be obtained. And obtaining a linear function of the change of the mesh plate distance in the third process according to the slope. For example: y = bX. The linear function curve is obtained according to the variation trend of the mesh plate spacing corresponding to points in different strokes, so that the adjustment range and amplitude of the mesh plate spacing variation in different strokes can be obtained according to the linear function of the mesh plate spacing variation.
In this embodiment, the absolute values of the slope a and the slope b are the same, that is, the decreasing amplitude of the first stroke screen pitch is the same as the increasing amplitude of the third stroke screen pitch, and the increasing or decreasing amplitude of the screen pitch is calculated through experiments to ensure the yield of the solar cell printing.
In another embodiment, the control device controls the non-linear decrease in the mesh plate spacing in the first stroke and the non-linear increase in the mesh plate spacing in the third stroke.
Referring to fig. 9, in the present embodiment, the screen pitch decreases nonlinearly from the starting edge P4 of the solar cell printing to the first position P5. And at the second position P6, the printing end edge P7 of the solar cell is in nonlinear rise of the screen space. When the solar cell is printed, the change of the screen pitch in the first stroke conforms to the curve decreasing trend, and the change of the screen pitch in the third stroke conforms to the curve increasing trend. The function curve of the nonlinear decrease of the screen interval in the first stroke and the function curve of the nonlinear increase of the screen interval in the third stroke are symmetrically arranged relative to the middle position of the solar cell printing. For example: the function of the screen space change curve is Y = ax 2 . And obtaining the function curve according to the variation trend of the mesh plate spacing corresponding to points in different strokes. The variation trend and the range of the mesh plate spacing are adjusted by adjusting the variation of the index a. It should be noted that the index a is adjusted to adjust the variation trend of the mesh plate spacing, and the change of the index a is adjusted by the control program, so that the control program is simple, the equipment structure is simpler and more convenient, and the cost is reduced.
It is understood that in other embodiments, the variation trend of the screen pitch in the first stroke and the third stroke may also be other function curves, and this embodiment is not particularly limited, and the screen pitch may be dynamically adjusted according to a preset trend in the printing stroke according to the printing requirement.
The solar cell printing device of this embodiment is linear through being reduced at first stroke control otter board interval to be linear at third stroke control otter board interval and rise, solved the inhomogeneous condition of solar cell printing grid line, and effectively reduced the thick liquids loss that the increase otter board interval brought, improved the yield of solar cell printing.
EXAMPLE five
Referring to fig. 2 to 4, on the basis of the first embodiment, the present embodiment provides a solar cell screen printing apparatus, which adjusts the screen pitch by controlling the movement of the screen in the vertical direction. Specifically, adjusting device is including locating on base 1 and being located the first lead screw slider module 50 and the second lead screw slider module 60 of otter board both sides, be equipped with the first connecting piece that is used for fixed connection otter board 10 one side on the first lead screw slider module 50, be equipped with the second connecting piece that is used for fixed connection otter board relative one side on the second lead screw slider module 60, first lead screw slider module and second lead screw slider module simultaneous movement drive otter board move in order to adjust the otter board interval in vertical direction.
In this embodiment, a circular printing platform 20 is disposed on the base 1, and a plurality of batteries 21 may be disposed on the printing platform 20. After the previous battery 21 is printed, the printing platform 20 can be driven to rotate, and the next battery 21 is controlled to be positioned right below the screen 10. The screen plate 10 is connected with the first lead screw slider module 50 and the second lead screw slider module 60 through the first connecting piece and the second connecting piece, and the screen plate 10 is driven to move up and down along the vertical direction through the first lead screw slider module 50 and the second lead screw slider module 60.
The first lead screw slider module 50 includes a first lead screw bracket 51, a first screw 52 located on the first lead screw bracket 51, and a first motor 53 driving the first screw 52 to move along a vertical direction. The second screw rod sliding block module has the same structure as the first screw rod sliding block module. This embodiment is not described in detail.
The first connecting piece comprises a first connecting block 11 connected with the first screw rod, two sides of the first connecting block 11 are provided with fixing blocks 12 used for fixing the screen plate 10, each fixing block 12 is provided with a guide sliding block 13, and the first lead screw bracket 51 is provided with two guide sliding rails 54 matched with the guide sliding blocks 13.
The first motor 53 drives the first screw 52 to move up and down along the vertical direction, the first connecting block 11 is driven by the first screw 52 to move up and down along the vertical direction, meanwhile, the guide slider 13 moves on the guide slide rail 54, and the guide slider 13 and the guide slide rail 54 are matched to play a role in guiding, so that the screen plate 10 is prevented from moving in the horizontal direction. The second connecting piece has the same structure as the first connecting piece, and the description is omitted in this embodiment.
In this embodiment, the control device is connected to the first lead screw slider module 50 and the second lead screw slider module 60, and the first lead screw slider module 50 and the second lead screw slider module 60 are controlled by the control device to move according to a preset program rule.
The solar cell screen printing device of this embodiment, through first lead screw slider module, the cooperation of second lead screw slider module drives the otter board along vertical direction up-and-down motion, with the dynamic adjustment otter board interval, specifically, the first stroke control otter board interval at solar cell printing progressively reduces, keep unchangeable at second stroke control otter board interval, and progressively rise at third stroke control otter board interval, effectively avoid the inhomogeneous condition of solar cell printing grid line, and effectively reduced the thick liquids loss that improves the otter board interval and brought, the yield of solar cell printing has been improved.
Example six
Referring to fig. 5 to 7, on the basis of the first embodiment, the present embodiment provides a screen printing apparatus for solar cells, wherein the adjusting device includes a second lead screw bracket 31, a second screw 33 located on the second lead screw bracket 31, and a second motor 32 driving the second screw 33 to move up and down in the vertical direction, and the printing platform 20 is fixedly connected to the second screw 33.
In this embodiment, the second motor 32 drives the second screw 33 to move in the vertical direction, so as to drive the printing platform 20 to move in the vertical direction, and further adjust the distance between the screen 10 and the printing platform 20.
Further, the adjusting device further comprises a linear slide rail 40 moving along the horizontal direction, a slide block 41 moving along the linear slide rail 40 is arranged on the linear slide rail 40, and the slide block 41 is fixedly connected with the second lead screw bracket 31 and used for driving the printing platform 20 to move in the horizontal direction.
In this embodiment, the sliding block 41 can drive the printing platform 20 to move on the linear slide rail 40, and two printing platforms 20 can be disposed on the linear slide rail 40, so as to improve the charging efficiency of the battery.
Specifically, the top of otter board 10 still is equipped with printing guide rail 2, is equipped with the scraper on the printing guide rail 2, still is equipped with the first linear module of control scraper along the motion of printing guide rail 2 and the second linear module of control scraper along vertical direction motion on the printing guide rail 2. The control device is connected with the first linear module and the second linear module. During printing, the scraper is controlled by the control device to be pressed down to the screen 10 and move from the starting position to the cutter retracting position according to a preset speed, and meanwhile, the adjusting device is controlled to adjust the distance between the screens according to a preset rule so as to finish the unidirectional stroke of solar cell printing.
The solar cell screen printing device of this embodiment, drive printing platform along vertical direction up-and-down motion through adjusting device, in order to realize the interval between the dynamic adjustment otter board, specifically, the first stroke control otter board interval at solar cell printing progressively reduces, keep unchangeable at second stroke control otter board interval, and progressively rise at third stroke control otter board interval, effectively avoid the inhomogeneous condition of solar cell printing grid line, and effectively reduced the thick liquids loss that improves the otter board interval and brought, the yield of solar cell printing has been improved. Compared with the existing mode of printing the battery by fixing the screen height, the printing efficiency of the battery is improved on one hand, and the loss of the sizing agent is reduced on the other hand.
The utility model discloses a solar cell screen printing device, through the first stroke control otter board interval at solar cell printing progressively reduce, and progressively rise at third stroke control otter board interval, the inhomogeneous problem of grid line can appear at the current screen printing edge of having solved, and the second stroke at middle solar cell printing keeps the otter board interval unchangeable, and the otter board interval of first stroke and third stroke all is greater than the otter board interval of second stroke, for the scheme of current improvement otter board interval, the gram weight of printing thick liquids has been reduced, the problem that the thick liquids gram weight that the improvement otter board interval brought increases has been solved. Through in the beginning position to the beginning edge of solar cell printing to and during the printing stroke of the end edge of solar cell printing to receipts sword position, all keep the otter board interval unchangeable, for the otter board interval of solar cell printing stroke, improved the otter board interval of beginning position and receipts sword position, solved the deckle edge problem at solar cell printing edge, improved the efficiency of solar cell printing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (8)
1. A screen printing device for solar batteries is characterized in that,
the solar cell screen printing apparatus includes:
the solar cell module comprises a base, a plurality of solar cells and a plurality of solar cells, wherein the base is provided with a printing platform for placing the solar cells;
a screen plate is arranged right above the printing platform, and a scraper is arranged above the screen plate; the position of the screen plate where the printing forward stroke of the scraper starts is a starting position, and the position of the screen plate where the printing forward stroke of the scraper finishes is a cutter retracting position; a first position and a second position are arranged between the starting edge of the solar cell printing and the ending edge of the solar cell printing, wherein the first position is close to the starting edge, and the second position is close to the ending edge; the solar cell printing run comprises: a first stroke of the starting edge to the first position, a second stroke of the first position to the second position, and a third stroke of the second position to the ending edge;
the adjusting device is used for adjusting the distance between the screen plates, and the distance between the screen plates is the distance between the screen plates and the printing platform;
the control device is connected with the adjusting device and is used for controlling the adjusting device to enable the distance between the screen plates to be gradually reduced in the first stroke, the second stroke to be kept unchanged and the distance between the screen plates to be gradually increased in the third stroke;
the mesh plate interval of the first stroke and the mesh plate interval of the third stroke are both larger than the mesh plate interval of the second stroke.
2. The solar cell screen printing apparatus according to claim 1,
the first stroke and the third stroke are equal in distance; and/or the ratio of the interval of the first stroke to the interval of the total printing stroke of the solar cell is 2-5%.
3. The solar cell screen printing apparatus according to claim 1,
the mesh plate spacing of the starting position and the cutter retracting position is equal; and/or the ratio of the distance from the starting position to the starting edge to the distance of the total stroke of the solar cell printing is 3-20%.
4. Solar cell screen printing apparatus according to claim 1,
the adjusting device comprises a first lead screw slider module and a second lead screw slider module which are arranged on the base and located on two sides of the screen plate, a first connecting piece used for being fixedly connected with one side of the screen plate is arranged on the first lead screw slider module, a second connecting piece used for being fixedly connected with the other side of the screen plate is arranged on the second lead screw slider module, and the first lead screw slider module and the second lead screw slider module move simultaneously to drive the screen plate to move in the vertical direction.
5. The solar cell screen printing apparatus according to claim 4,
the first lead screw sliding block module comprises a first lead screw support, a first screw rod positioned on the first lead screw support and a first motor driving the first screw rod to move in the vertical direction.
6. Solar cell screen printing apparatus according to claim 5,
the first connecting piece comprises a first connecting block connected with the first screw rod, fixing blocks used for fixing the screen plate are arranged on two sides of the first connecting block, a guide sliding block is arranged on each fixing block, and a guide sliding rail matched with the guide sliding block is arranged on the first lead screw support.
7. Solar cell screen printing apparatus according to claim 1,
the adjusting device comprises a second screw rod support, a second screw rod and a second motor, the second screw rod is located on the second screw rod support, the second motor drives the second screw rod to move up and down in the vertical direction, the printing platform is fixedly connected to the second screw rod, and the second motor drives the printing platform to move up and down in the vertical direction.
8. The solar cell screen printing apparatus according to claim 7,
the adjusting device further comprises a linear slide rail moving along the horizontal direction, a second slide block moving along the linear slide rail is arranged on the linear slide rail, and the second slide block is fixedly connected with the second lead screw support and used for driving the printing platform to move along the horizontal direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122227115.2U CN217863241U (en) | 2021-09-14 | 2021-09-14 | Solar cell screen printing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122227115.2U CN217863241U (en) | 2021-09-14 | 2021-09-14 | Solar cell screen printing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454173A (en) * | 2023-06-16 | 2023-07-18 | 临沂鼎鑫新能源有限公司 | Photovoltaic cell preparation device and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454173A (en) * | 2023-06-16 | 2023-07-18 | 临沂鼎鑫新能源有限公司 | Photovoltaic cell preparation device and preparation method thereof |
| CN116454173B (en) * | 2023-06-16 | 2023-09-05 | 临沂鼎鑫新能源有限公司 | Photovoltaic cell preparation device and preparation method thereof |
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