CN210478084U - Battery piece and half tone - Google Patents
Battery piece and half tone Download PDFInfo
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- CN210478084U CN210478084U CN201920984483.1U CN201920984483U CN210478084U CN 210478084 U CN210478084 U CN 210478084U CN 201920984483 U CN201920984483 U CN 201920984483U CN 210478084 U CN210478084 U CN 210478084U
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- 238000007650 screen-printing Methods 0.000 abstract description 20
- 238000013082 photovoltaic technology Methods 0.000 abstract description 2
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model discloses a battery piece and half tone relates to the photovoltaic technology field. The battery piece comprises a battery piece body and a grid line structure printed on the battery piece body, wherein the grid line structure comprises a main grid line and an auxiliary grid line vertically communicated with the main grid line, the edge of the main grid line in the length direction is a curved wavy line, and two ends of the main grid line in the length direction respectively comprise at least two parallel sub-grid lines. In the battery piece, the edge of the main grid line along the length direction is a curved wave line, at least part of the edge of the main grid line can be prevented from being shielded by the steel wire in the screen printing plate, so that the main grid line is ensured to be printed more fully, the lack of printing at the edge of the main grid line is favorably eliminated, the printing quality is improved, the main grid line on the battery piece is complete, the appearance of the battery piece is good, the collection capacity of the main grid line on current is strong, and the efficiency of the battery piece is improved.
Description
Technical Field
The utility model relates to a photovoltaic technology field especially relates to a battery piece and half tone.
Background
The non-net-knot screen printing plate uses a zero-degree opening screen, namely, the steel wire of the screen printing plate is parallel to one side of the screen frame. Because the non-screen-junction screen printing plate has the advantages of thin printing grid line, low wet weight, good slurry permeability and the like, the non-screen-junction screen printing plate is gradually popularized in the screen printing process of the solar cell in recent years.
The edges of the main grid pattern on the conventional non-mesh screen plate, which allow printing slurry to pass through, are linear, that is, the edges of the main grid pattern are parallel to the steel wires on one side. In the daily production process of using the non-mesh screen printing plate, the condition that the edge of a main grid line on a battery piece is lack of printing sometimes occurs, the appearance of the battery piece is influenced, and the collection capacity of the main grid line on current is influenced, so that the efficiency of the battery piece is influenced, and meanwhile, the welding tension of the battery piece is influenced.
Therefore, a battery piece and a screen printing plate are needed to solve the problem of the lack of printing on the edge of the main grid line.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery piece, main grid line is complete on this battery piece, is favorable to improving the efficiency of battery piece.
To achieve the purpose, the utility model adopts the following technical proposal:
a battery piece comprises a battery piece body and a grid line structure printed on the battery piece body, wherein the grid line structure comprises a main grid line and an auxiliary grid line vertically communicated with the main grid line, the edge of the main grid line in the length direction is a curved wavy line, and two ends of the main grid line in the length direction respectively comprise at least two parallel sub-grid lines.
Wherein, the length ratio of the sub-grid line to the main grid line is 1:11-1: 9.
and a plurality of point-shaped hollow-out areas are arranged in the main grid line.
And the adjacent dotted hollow areas are distributed in a staggered manner along the length direction of the main grid line.
The auxiliary grid line is a transition section at the position communicated with the main grid line, and the width of the transition section is gradually increased along the direction close to the main grid line.
Wherein the width of the transition section is 60-80 μm, and the length of the transition section is 1-1.5 mm.
The grid line structure further comprises a breakage-proof grid line communicated with two adjacent auxiliary grid lines, and the breakage-proof grid line is of a wave type.
Wherein the width of the breakage-proof grid line is 30-60 μm.
Wherein, the grid line structure still includes:
the edge frame line is arranged on the outer sides of the main grid line and the auxiliary grid line in a surrounding mode, and at least the edge, parallel to the main grid line, of the edge frame line is a curved wavy line.
The battery piece body comprises at least two half pieces, the grid line structures are printed on each half piece, and the two adjacent grid line structures are separated by printing blank regions.
Wherein the printing blank area is parallel to the main grid line or the auxiliary grid line.
Another object of the utility model is to provide a half tone, the problem of lacking the seal at main grid line edge when this half tone can solve the printing.
To achieve the purpose, the utility model adopts the following technical proposal:
a screen having a printed pattern disposed thereon that allows the passage of a slurry, the printed pattern comprising:
the grid line pattern comprises a plurality of parallel main grid line patterns, wherein the edge of each main grid line pattern extending along the length direction is a curved wavy line, and two ends of each main grid line pattern along the length direction respectively comprise at least two parallel branches; and
and the auxiliary grid line patterns are perpendicular to and communicated with the main grid line pattern.
The auxiliary grid line pattern is a transition region at the position communicated with the main grid line pattern, and the width of the transition region is gradually increased along the direction close to the corresponding main grid line pattern.
Wherein the width of the transition zone is 60-80 μm, and the length of the transition zone is 1-1.5 mm.
Wherein, a plurality of punctiform partition areas are arranged in the main grid line graph.
And the adjacent dot partition areas are distributed in a staggered manner along the length direction of the main grid line pattern.
Wherein the ratio of the length of the branch to the length of the main grid line pattern is 1:11-1: 9.
wherein the printed graphic further comprises:
and the edge of the frame graph parallel to the main grid line graph is a curved wavy line.
Wherein the printed graphic further comprises:
and the anti-breaking and anti-deleting graphs are communicated with the two adjacent auxiliary grid line graphs, and are wave-shaped.
Wherein the width of the anti-deletion graph is 30-60 mu m.
The screen printing plate comprises at least two printing areas arranged at intervals, and the printing patterns are arranged in each printing area.
The utility model has the advantages that:
the utility model provides a battery piece and half tone. The edge of main grid line figure along length direction in this half tone is curvilinear figure wave structure, can make at least partial edge of main grid line figure not sheltered from by the steel wire in the half tone to guarantee that printing paste sees through smoothly, be favorable to eliminating main grid line edge and lack the seal, improve the printing quality, make on the battery piece main grid line complete, the battery piece outward appearance is good, and the main grid line is strong to the collection ability of electric current, thereby improves battery piece efficiency.
In the cell, the edges of the main grid lines along the length direction are curved wavy lines, the main grid lines are printed more fully, the quality of the cell is improved, the main grid lines on the cell are complete, the appearance of the cell is good, the main grid lines have strong current collection capacity, and therefore the efficiency of the cell is improved; the two ends of the main grid line comprise at least two parallel sub-grid lines, so that the consumption of the slurry can be reduced, and the printing cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a screen printing plate according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a printed pattern according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic partial structure diagram of a printed pattern according to an embodiment of the present invention;
fig. 5 is a schematic partial structure diagram of another printed pattern provided in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a printing pattern provided in the second embodiment of the present invention;
FIG. 7 is a partial enlarged view at B in FIG. 6;
fig. 8 is a schematic structural diagram of a printed pattern provided in the third embodiment of the present invention;
FIG. 9 is an enlarged view of a portion of FIG. 8 at C;
fig. 10 is a schematic structural diagram of a battery cell according to a fourth embodiment of the present invention.
Wherein:
110. a screen frame; 120. screen cloth; 130. a printing area; 131. a latex layer; 132. steel wire mesh;
3. printing a pattern; 31. a main grid line pattern; 311. branching; 312. a dotted partition region; 32. a secondary grid line pattern; 321. a transition zone; 33. a frame graph; 34. preventing the pattern from being deleted;
4. a cell body; 41. a main gate line; 42. a secondary gate line; 43. a frame line; 44. preventing the line from being cut off; 45. printing the blank area.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example one
The embodiment provides a screen printing plate which can be used for a screen printing process in a solar cell processing process. As shown in fig. 1, the screen includes a frame 110, a mesh 120, and a printing area 130. The frame 110 may be a rectangular frame, the edge of the mesh cloth 120 is fixed on the frame 110, the center of the mesh cloth 120 is connected with the printing area 130, and the mesh cloth 120 and the printing area 130 are disposed in a tensioned manner. Wherein the printing area 130 is provided with a printing pattern 3 allowing the slurry to pass through. During printing, the screen is disposed above the battery piece, the paste is applied on the printing region 130, and the paste located at the position of the printing pattern 3 falls on the battery piece through the screen, so as to form the printing pattern 3 on the battery piece.
Specifically, the printing area 130 includes a steel wire mesh 132 woven by steel wires and a latex layer 131 laid on the steel wire mesh 132, and a hollow area is provided on the latex layer 131, and the hollow area forms the printing pattern 3. In this embodiment, as shown in fig. 2, the print pattern 3 includes a plurality of parallel main gate line patterns 31 and a plurality of parallel sub gate line patterns 32, and the sub gate line patterns 32 are disposed perpendicular to and communicate with the main gate line patterns 31.
In this embodiment, the screen may be a mesh-free screen, that is, the steel wires in the steel wire mesh 132 that are staggered horizontally and vertically are parallel to the corresponding side of the screen frame 110. The screen printing plate without the screen knots has the advantages of thin printing grid lines, low wet weight, good slurry permeability and the like.
In the prior art, the edges of the two sides of the main grid line pattern 31 are straight lines, that is, the edges of the two sides of the main grid line pattern 31 are parallel to the frame of the corresponding side of the screen frame 110, the edge of the main grid line pattern 31 is easy to be close to the steel wire extending along the length direction of the main grid line pattern 31, so that slurry is difficult to completely permeate during printing, the edge of the main grid line 41 printed on a battery piece is easy to be lack of print, in serious cases, the appearance of the battery piece is influenced, the collection capacity of the main grid line 41 to current is also influenced, the efficiency of the battery piece is influenced, and meanwhile, the welding tension.
To solve the above problem, as shown in fig. 2 and 3, the main gate line pattern 31 is a straight line as a whole, and the edge of the main gate line pattern 31 along the length direction thereof is a curved wavy line, that is, the edge of the main gate line pattern 31 along the length direction thereof is a wavy line formed by a curve. By arranging the edges of the main grid pattern 31 as wavy lines, as shown in fig. 4, the distance between the edges and the steel wires extending along the length direction thereof can be varied, and the situation where the distance between the edges and the corresponding steel wires is always short does not occur. Even if the partial edge is close to the steel wire, so that the printing performance of the partial area is slightly poor, the adjacent edge is far from the steel wire, and the slurry can smoothly permeate through the printing ink. Because the slurry has fluidity, the penetrated slurry extends to other parts, and at the moment, the extending glue can fill up a small part of the area with poor printing performance to form a full main grid line pattern 31.
In this embodiment, the edge of the main grid line pattern 31 is a wavy line formed by a curve, and compared with a wavy line formed by a straight line, the change of the edge angle is more gradual, which is beneficial to slurry diffusion, so that the slurry is distributed more uniformly without filling dead angles.
Alternatively, as shown in fig. 4, the edges of two opposite sides of the main gate line pattern 31 may be arranged in parallel, so that the directions of the main gate lines 41 on two sides are substantially the same, the width of the main gate line pattern 31 is the same, and the amount of paste required for printing can be controlled by controlling the width of the main gate line pattern 31, thereby controlling the cost.
Optionally, as shown in fig. 5, in the edges of the two opposite sides of the main grid line pattern 31, the outward protruding curves are arranged oppositely, and the inward protruding curves are arranged oppositely, so that the width of the main grid line pattern 31 is changed, and the main grid line pattern has a relatively wider area and a relatively narrower area, which is beneficial to increasing the area capable of normally permeating the paste, thereby further reducing the defect of missing the main grid line 41.
In order to control the paste required for printing the main grid lines 41, the average value of the maximum width B1 and the minimum width B2 of the main grid line pattern 31 may be equal to the width of the main grid line pattern 31 with a straight edge in the prior art, so that the paste required for printing the main grid lines 41 in the present embodiment may be similar to the prior art, and the consumption of the paste may not be increased due to the change of the shape of the edge of the main grid line pattern 31.
As shown in fig. 3, both ends of the main gate line pattern 31 along the length direction include at least two parallel branches 311, and the latex layer 131 is disposed between two adjacent branches 311 and is not connected. The width of the main gate line pattern 31 is not changed, and by arranging the branches 311, the areas of the two ends of the main gate line pattern 31 can be reduced, the consumption of the paste is reduced, and the cost control is facilitated.
Alternatively, two ends of the main gate line pattern 31 in the length direction may further include three or more branches 311. Under the condition that the total width of the main gate line pattern 31 is not changed, the more the branches 311 are, the smaller the width of each branch 311 is, and the greater the processing difficulty is, therefore, in the embodiment, two branches 311 are arranged at each end, and the problem that slurry is disconnected due to the fact that the branches 311 are too thin can be solved.
Optionally, the length ratio of the branches 311 to the main gate line pattern may be 1:11-1:9, for example, the length ratio of the branches 311 to the main gate line pattern may be 1:11, 1:10, or 1:9, and within the range of the length ratio, the length of the main gate line pattern 31 between the branches 311 at two ends may be ensured on the basis of reducing the consumption of the paste, so as to meet the requirement of connecting the main gate line 41 and the solder strip.
Optionally, a plurality of dot-shaped partition regions 312 may be further disposed in the middle portion of the main grid line pattern 31, and latex is disposed in the dot-shaped partition regions 312, so that the penetration of the slurry can be blocked, thereby reducing the total amount of the slurry required by the main grid lines 41. By arranging the dot-shaped partition regions 312, not only can the consumption of paste be reduced, but also the paste area of the main grid lines 41 in the middle part can be ensured, so that the main grid lines 41 can be ensured to be in good contact with the solder strips, and the connection effect can be ensured.
Alternatively, the shape of the dot-shaped blocking regions 312 may be rectangular, triangular, circular, oval, etc., all of which may reduce the slurry consumption.
Since the middle region of the main gate line 41 needs to be connected to the solder strip, in order to ensure a good fixing effect with the solder strip, the distribution density of the dot-shaped partition regions 312 in the main gate line pattern 31 is not too dense, so as to ensure the tensile force of the main gate line 41. Correspondingly, the distribution density of the dot-shaped blocking regions 312 in the main grid line pattern 31 should not be too sparse, so as to reduce the requirement for slurry.
Optionally, in this embodiment, the side length of the silicon wafer is 155mm, the width of the main gate line 41 is 0.55mm, and the distance between adjacent sub-gate lines 42 is 1.5mm, then four dot-shaped partition areas 32 may be disposed in the main gate line pattern 31 between two adjacent sub-gate line patterns 32, where the dot-shaped partition areas 32 may be oval, the major axis of the dot-shaped partition areas is 0.1mm, and the minor axis of the dot-shaped partition areas is 0.08 mm. Within this range, the tensile force of the printed main gate line 41 can be ensured, and the amount of paste required for printing the main gate line can be reduced.
In order to further increase the tensile force of the main grid line, four dot-shaped partition regions 32 may be disposed in the main grid line pattern 31 between two adjacent sub grid line patterns 32 and may be distributed. Optionally, the four dot-shaped partition areas 32 may be distributed in a square matrix, so as to avoid the concentrated distribution of the dot-shaped partition areas 32 at a certain position.
Alternatively, two adjacent rows of dot spacers 32 may be staggered along the length of the bus bar pattern 31 to further disperse the dot spacers 32.
Since the width of the sub-grid line pattern 32 is thinner than that of the main grid line pattern 31, when printing, the paste is easily broken at the intersection of the main grid line pattern 31 and the sub-grid line pattern 32. Therefore, in this embodiment, the communication position of the sub-gate line pattern 32 with the main gate line pattern 31 is a transition region 321, and the width of the transition region 321 gradually increases along the direction close to the corresponding main gate line pattern 31, which is beneficial to smooth diffusion of the paste to communicate the main gate line pattern 31 and the sub-gate line pattern 32.
Alternatively, the width of the transition region 321 may be 60-80 μm, such as 61 μm, 62 μm, 63 μm, 64 μm, 65 μm, 66 μm, 67 μm, 68 μm, 69 μm, 70 μm, 71 μm, 72 μm, 73 μm, 74 μm, 75 μm, 76 μm, 77 μm, 78 μm, 79 μm, 80 μm. The length of the transition zone 321 may be 1-1.5mm, e.g., 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5 mm. The size of the transition region 321 is in the range, which is beneficial to smooth diffusion and communication of slurry.
Optionally, in order to improve the printing efficiency, the screen may include at least two printing areas 130 arranged at intervals, and each printing area 130 has a printing pattern, so that a plurality of printing patterns can be completed at one time, and the printing efficiency is improved. In this embodiment, two printing regions 130 are disposed on the screen, and the two printing regions 130 are separated by the latex layer, so that two printing patterns disposed at intervals are formed on the cell body after printing.
In this embodiment, the battery pieces are printed by using the screen printing plate contrast group having the main grid line pattern 31 with a straight line edge and the screen printing plate experiment group having the main grid line pattern 31 with a curved wavy line edge in the prior art, respectively, and the experimental data and the obtained efficiency data are as follows:
TABLE 1
TABLE 2
As can be seen from the data in tables 1 and 2, the efficiency of the cell sheet was improved by 0.01% by the screen printing provided in this example.
Example two
The cell piece is further provided with a border line 43 at the peripheral edge, and as shown in fig. 6, the printed pattern 3 on the screen further includes a border pattern 33 at the peripheral edge of the printing area 130, and the border pattern 33 is disposed around the printing area 130. In order to avoid the problems of missing marks of the border lines 43, the present embodiment provides a screen printing plate, which is different from the first embodiment in that the edge of the border pattern 33 parallel to the main grid line pattern 31 is a curved wavy line. As shown in fig. 7, the curved wavy line may vary the distance between the edge pair and the steel wire extending along the length direction thereof, and the situation that the edge is always close to the corresponding steel wire does not occur. Even if the partial edge is close to the steel wire, so that the printing performance of the partial area is slightly poor, the adjacent edge is far from the steel wire, and the slurry can smoothly permeate through the printing ink. Since the paste has fluidity, the penetrated paste extends to other parts, and at this time, the extending glue can fill up a small part of the area with slightly poor printability, so as to form a full border line 43.
Alternatively, the edge of the frame pattern 33 and the edge of the bus line pattern 31 may have the same structure, and thus, the description thereof is omitted.
EXAMPLE III
Because the width of the sub-grid line 42 on the cell is thin, the disconnection is easy to occur, and the current loss on the cell is caused. In order to solve the above problem, the present embodiment provides a screen printing plate, which is different from the above embodiment in that, as shown in fig. 8, the printed pattern 3 further includes a breaking prevention pattern 34 connecting two adjacent sub-grid line patterns 32, the breaking prevention pattern 34 may form a breaking prevention line 44, the breaking prevention line 44 connects adjacent sub-grid lines 42, and it is possible to prevent the sub-grid lines 42 from providing another current loop when the sub-grid lines 42 are broken, so that the sub-grid lines 42 are communicated with the main grid line 41, thereby reducing current loss to the maximum extent.
Because the intersecting points exist in the steel wires which are staggered transversely and longitudinally in the steel wire mesh 132, when the anti-deletion graph 34 passes through the intersecting points, slurry at the intersecting points is not easy to permeate, so that the anti-deletion line 44 has the problem of printing missing or discontinuity.
To solve the above problem, as shown in fig. 9, the anti-deletion pattern is a wave pattern. The anti-breaking grid pattern 34 is set to be wavy, so that at least part of steel wire intersection points can be avoided, the printed anti-breaking grid line 44 is full, and current loss caused by grid breaking is avoided.
Optionally, the width of the anti-deletion pattern 34 should not be too wide, which would increase the wet weight of the paste and increase the printing cost; the width of the anti-deletion pattern 34 should not be too narrow, and too narrow is easy to break, which affects the printing effect.
Alternatively, the width of the anti-degritting pattern 34 may be 30-60 μm, for example 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm. The influence of the intersection point of the steel wires on grid line printing can be avoided within the width range, and meanwhile, the production cost is reduced.
In other embodiments, the anti-deletion pattern 34 may be a straight line, and the two side edges thereof are wavy lines, so as to avoid the influence of the intersection of the steel wires on the printing of the grid lines to a certain extent.
In other embodiments, the two side edges of the finger pattern 32 along the length direction thereof may also be wavy lines, such as curved wavy lines or straight wavy lines, which is beneficial to reducing the occurrence of missing prints.
Example four
As shown in fig. 10, the present embodiment provides a battery piece, which may adopt the screen printing grid line. Specifically, the battery piece includes battery piece body 4, the grid line structure of printing on battery piece body 4. The gate line structure includes a main gate line 41 and a sub-gate line 42 vertically communicating with the main gate line 41. The edge of the main gate line 41 along the length direction thereof is a curved wavy line, and both ends of the main gate line 41 along the length direction thereof include at least two parallel sub-gate lines. In this embodiment, the main grid lines 41 are full and have no missing print, the printing appearance of the battery piece is good, the efficiency of the battery piece is improved, and the welding tension of the main grid lines 41 is ensured. The two ends of the main grid line 41 along the length direction are provided with the parallel sub grid lines, so that the consumption of the slurry can be reduced, and the printing cost is reduced.
Optionally, the length ratio of the sub-gate lines to the main gate line 41 may be 1:11-1:9, for example, the length ratio of the sub-gate lines to the main gate line 41 may be 1:11, 1:10, or 1:9, and within the range of the length ratio, the length of the main gate line 41 between the two sub-gate lines may be ensured on the basis of reducing the consumption of the paste, so as to meet the requirement of connecting the main gate line 41 and the solder strip.
Optionally, a plurality of dotted hollow-out areas may be further disposed in the main gate line 41, and by disposing the dotted hollow-out areas, the main gate line 41 may have a certain area, so as to improve the contact effect between the solder strip and the main gate line 41, and reduce the slurry consumption of the main gate line 41, thereby reducing the cost.
Optionally, the shape of the dotted hollow-out area may be rectangular, triangular, circular, oval, and the like, which may reduce the consumption of the slurry.
Since the middle region of the main gate line 41 needs to be connected to the solder strip, in order to ensure a good fixing effect between the main gate line 41 and the solder strip, the distribution density of the dotted hollow-out regions in the main gate line 41 is not too dense, so as to ensure the tensile force of the main gate line 41. Correspondingly, the distribution density of the dot-shaped hollow-out areas in the main grid line 41 is not too sparse, so that the requirement for slurry is reduced.
In this embodiment, the side length of the silicon wafer is 155mm, the width of the main gate line 41 is 0.55mm, and the distance between adjacent sub-grid lines 42 is 1.5mm, then four dotted hollow areas may be disposed on the main gate line 41 between two adjacent sub-grid lines 42, the dotted hollow areas may be oval, the major axis of the dotted hollow areas is 0.1mm, and the minor axis of the dotted hollow areas is 0.08 mm. Within this range, the tensile force of the printed main gate line 41 can be ensured, and the amount of paste required for printing the main gate line can be reduced.
In order to further improve the tensile force of the main grid line, four dotted hollow areas may be disposed in the main grid line 41 between two adjacent sub-grid lines 42 and may be dispersed. Optionally, the four dotted hollow-out areas can be distributed in a square matrix, so that the dotted hollow-out areas are prevented from being distributed in a certain position in a concentrated manner.
Optionally, along the length direction of the main gate line 41, two adjacent rows of dot-shaped hollow-out areas may be distributed in a staggered manner, so as to further disperse the dot-shaped hollow-out areas.
Optionally, the position of the secondary grid line 42 communicated with the main grid line 41 is a transition section, and the width of the transition section gradually increases along a direction close to the main grid line 41. By arranging the transition section, the transition from the thinner auxiliary grid line 42 to the thicker main grid line 41 can be realized, and the connection effect of the main grid line 41 and the auxiliary grid line 42 is ensured.
Alternatively, the width of the transition section may be 60-80 μm, such as 61 μm, 62 μm, 63 μm, 64 μm, 65 μm, 66 μm, 67 μm, 68 μm, 69 μm, 70 μm, 71 μm, 72 μm, 73 μm, 74 μm, 75 μm, 76 μm, 77 μm, 78 μm, 79 μm, 80 μm. The length of the transition section may be 1-1.5mm, e.g. 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5 mm. The size of the transition section is in the range, which is beneficial to smooth diffusion and communication of the slurry during printing.
Optionally, the grid line structure further includes a breaking-preventing line 44 for communicating two adjacent sub-grid lines 42, and the breaking-preventing line 44 can communicate the sub-grid line 42 and the main grid line 41 when the sub-grid line 42 is broken, so as to avoid current loss of the battery piece.
Alternatively, the anti-breaking lines 44 may be wavy lines, which avoid the intersection points of the intersections of the steel wires on the partial screen printing plates during printing, so as to avoid breaking of the anti-breaking lines 44.
Optionally, the width of the anti-deletion line 44 should not be too wide, which would increase the wet weight of the paste and increase the printing cost; the width of the anti-breaking lines 44 should not be too narrow, and the too narrow lines are easy to break, thereby affecting the printing effect. The width of the anti-deletion line 44 may be 30-60 μm. For example, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm. The influence of the intersection point of the steel wires on grid line printing can be avoided within the width range, and meanwhile, the production cost is reduced.
In other embodiments, the anti-breaking line 44 may be a straight line, and the two side edges thereof are wavy lines, so as to avoid the influence of the intersection of the steel wires on the printing of the grid line to a certain extent.
In this embodiment, the gate line structure further includes a border line 43. The border wire 43 may have a rectangular shape, and the rectangular border wire 43 may surround the outer sides of the main gate line 41 and the sub-gate line 42. In order to avoid the problem of missing prints and the like of the border wire 34 during printing, at least the edge of the border wire parallel to the main grid line 41 is a curved wavy line. By providing the edge as a curved wavy line, the distance from the edge of the frame line to the adjacent steel wire extending in the longitudinal direction of the frame line 43 can be varied during printing, and the situation where the distance from the edge to the corresponding steel wire is always short does not occur. Even if the partial edge is close to the steel wire, so that the printing performance of the partial area is slightly poor, the adjacent edge is far from the steel wire, and the slurry can smoothly permeate through the printing ink. Since the paste has fluidity, the penetrated paste extends to other parts, and at this time, the extending glue can fill up a small part of the area with slightly poor printability, so as to form a full border line 43.
For improving the production efficiency of the battery piece, the battery piece main body 41 can comprise two half pieces, each half piece is printed with a grid line structure, a printing blank area 45 is arranged between the two grid line structures, and the printing blank area 45 can separate the adjacent grid line structures, so that the printing grid lines in the two adjacent grid line structures are not connected.
After the printing of the battery piece is completed, the main grid lines 41 and the auxiliary grid lines 42 are printed in the corresponding half pieces, and the printing blank regions 45 are cut to separate the two half pieces, so that the processing efficiency of the battery piece is improved. In this embodiment, the two half-sheets are symmetrically arranged, so that the battery sheet body 41 can be divided into two parts with the same size after being cut.
In other embodiments, the cell body 41 may include three, four or more half-cells, and the half-cells may be arranged in a straight line or in a matrix, and the gate line structures on adjacent half-cells are separated by the printed blank regions 45. The halves can be separated by cutting the printed margins 45.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (17)
1. The battery piece is characterized by comprising a battery piece body (4) and a grid line structure printed on the battery piece body (4), wherein the grid line structure comprises a main grid line (41) and an auxiliary grid line (42) vertically communicated with the main grid line (41), the edge of the main grid line (41) along the length direction is a curved wavy line, and two ends of the main grid line (41) along the length direction respectively comprise at least two parallel sub-grid lines.
2. The battery piece of claim 1, wherein the ratio of the length of the sub grid lines to the length of the main grid lines (41) is 1:11-1: 9.
3. the battery piece according to claim 1, wherein a plurality of dotted hollow-out areas are arranged in the main grid line (41).
4. The battery piece of claim 3, wherein the adjacent dotted hollow-out areas are distributed in a staggered manner along the length direction of the main grid line (41).
5. The battery piece according to any one of claims 1-4, wherein the secondary grid lines (42) are transition sections at the positions communicated with the main grid lines (41), and the width of the transition sections is gradually increased along the direction close to the main grid lines (41).
6. The battery sheet according to claim 5, wherein the width of the transition section is 60 to 80 μm and the length of the transition section is 1 to 1.5 mm.
7. The battery piece according to any one of claims 1-4, characterized in that the grid line structure further comprises a breakage-proof grid line (44) which is communicated with two adjacent secondary grid lines (42), and the breakage-proof grid line (44) is of a wave type.
8. The battery piece of claim 7, wherein the width of the breakage preventing grid lines (44) is 30-60 μm.
9. The battery piece of any one of claims 1-4, wherein the grid line structure further comprises:
the border line is arranged on the outer sides of the main grid line (41) and the auxiliary grid line (42) in a surrounding mode, and at least the edge, parallel to the main grid line (41), of the border line is a curved wavy line.
10. A battery piece as claimed in any one of claims 1 to 4, wherein the battery piece body (4) comprises at least two half pieces, each half piece having the grid line structure printed thereon, adjacent two grid line structures being separated by a printed blanking region (45).
11. The battery piece of claim 10, wherein the printed blanking regions (45) are parallel to the bus bars (41) or the secondary bars (42).
12. A screen provided with a printed pattern (3) allowing the passage of a paste, characterized in that said printed pattern (3) comprises:
the grid line pattern comprises a plurality of parallel main grid line patterns (31), wherein the edge of each main grid line pattern (31) extending along the length direction is a curved wavy line, and two ends of each main grid line pattern (31) along the length direction respectively comprise at least two parallel branches (311); and
and a plurality of parallel sub-gate line patterns (32), wherein the sub-gate line patterns (32) are perpendicular to and communicated with the main gate line pattern (31).
13. The screen according to claim 12, wherein the sub-grid line patterns (32) are transition regions (321) at the positions where the sub-grid line patterns communicate with the main grid line patterns (31), and the width of each transition region (321) is gradually increased along the direction close to the corresponding main grid line pattern (31).
14. The screen of claim 12, wherein a plurality of dot-shaped interruptions (312) are provided in said main grid pattern (31).
15. The screen according to any one of claims 12 to 14, wherein the printed pattern (3) further comprises:
and the edge of the frame pattern (33) parallel to the main grid line pattern (31) is a curved wavy line.
16. The screen according to any one of claims 12 to 14, wherein the printed pattern (3) further comprises:
and the anti-breaking and deleting patterns (34) are communicated with the two adjacent auxiliary grid line patterns (32), and the anti-breaking and deleting patterns (34) are wave-shaped.
17. The screen of any one of claims 12 to 14, comprising at least two spaced-apart printing zones (130) on the screen, each printing zone (130) having the printed pattern disposed therein.
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|---|---|---|---|
| CN201920984483.1U CN210478084U (en) | 2019-06-27 | 2019-06-27 | Battery piece and half tone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920984483.1U CN210478084U (en) | 2019-06-27 | 2019-06-27 | Battery piece and half tone |
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| CN210478084U true CN210478084U (en) | 2020-05-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111546758A (en) * | 2020-05-26 | 2020-08-18 | 东莞南玻光伏科技有限公司 | Printing pattern template of non-mesh-knot screen printing plate |
| CN113561634A (en) * | 2021-06-28 | 2021-10-29 | 浙江硕克科技有限公司 | Metal screen printing plate capable of improving printing performance |
| CN114083914A (en) * | 2021-11-15 | 2022-02-25 | 横店集团东磁股份有限公司 | Printing design method of solar cell, printing assembly and photovoltaic assembly |
| WO2022143352A1 (en) * | 2020-12-30 | 2022-07-07 | 通威太阳能（成都）有限公司 | Solar cell and front electrode thereof, and manufacturing method |
| CN117219687A (en) * | 2023-11-06 | 2023-12-12 | 晶科能源(海宁)有限公司 | Solar cell and photovoltaic module |
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2019
- 2019-06-27 CN CN201920984483.1U patent/CN210478084U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111546758A (en) * | 2020-05-26 | 2020-08-18 | 东莞南玻光伏科技有限公司 | Printing pattern template of non-mesh-knot screen printing plate |
| WO2022143352A1 (en) * | 2020-12-30 | 2022-07-07 | 通威太阳能（成都）有限公司 | Solar cell and front electrode thereof, and manufacturing method |
| EP4099403A4 (en) * | 2020-12-30 | 2024-03-13 | Tongwei Solar Chengdu Co Ltd | Solar cell and front electrode thereof, and manufacturing method |
| CN113561634A (en) * | 2021-06-28 | 2021-10-29 | 浙江硕克科技有限公司 | Metal screen printing plate capable of improving printing performance |
| CN114083914A (en) * | 2021-11-15 | 2022-02-25 | 横店集团东磁股份有限公司 | Printing design method of solar cell, printing assembly and photovoltaic assembly |
| CN114083914B (en) * | 2021-11-15 | 2022-12-13 | 横店集团东磁股份有限公司 | Printing design method of solar cell, printing assembly and photovoltaic assembly |
| CN117219687A (en) * | 2023-11-06 | 2023-12-12 | 晶科能源(海宁)有限公司 | Solar cell and photovoltaic module |
| CN117219687B (en) * | 2023-11-06 | 2024-03-12 | 晶科能源(海宁)有限公司 | Solar cell and photovoltaic module |
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Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: CSI Cells Co.,Ltd. Patentee after: Atlas sunshine Power Group Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: CSI Cells Co.,Ltd. Patentee before: CSI SOLAR POWER GROUP Co.,Ltd. |
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