CN104339826A

CN104339826A - Solar cell main grid hollow positive electrode screen

Info

Publication number: CN104339826A
Application number: CN201310323371.9A
Authority: CN
Inventors: 傅强; 董道宴; 张崇超; 刘代军; 王承永
Original assignee: JIUZHOU SQUARE GARDEN NEW ENERGY Co Ltd
Current assignee: JIUZHOU SQUARE GARDEN NEW ENERGY Co Ltd
Priority date: 2013-07-30
Filing date: 2013-07-30
Publication date: 2015-02-11

Abstract

The invention discloses a solar cell main grid hollow positive electrode screen. The screen comprises three parallel hollow main grid lines and a plurality of parallel secondary grid lines, wherein the secondary grid lines are perpendicular to the main grid lines; the hollow main grid lines are provided with a plurality of hollow parts; a plurality of grooves are formed in the middle of the main grid lines after printing and sintering. The solar cell screen is simple and practical in design; the using amount of positive silver paste of a cell printed by using a positive silver screen pattern can be saved to a great extent, the production cost is greatly saved, the technological requirements of components are not affected, and the power loss of the components is not increased; the printed cell main grid is attractive and elegant, the plural grooves are formed in the middle of the main grid lines after printing and sintering, and molten tin on a copper strip after component welding directly falls into the grooves in the middle of the main grid lines to form embedded silver-tin connection, so that the connection of the silver grid line and the tin-coated copper strip is better, and the series resistance during welding is effectively reduced.

Description

A kind of solar cell main grid hollow out positive electrode half tone

Technical field

The technology of the present invention relates to a kind of screen printing screens figure, especially relates to a kind of solar cell silk screen printing to reduce the screen printing technique of production cost.

Background technology

In order to the photoelectric current of solar battery sheet being collected and being transported in load, must there is one the printing material of high efficiency cell configuration design and high conduction performance can be had with it to match, current solar battery sheet serigraphy all adopts the bonding conductor that silver-colored slurry is grid line, but silver is noble metal, it is expensive, all successively hollow out as complete in double loop main gate line is designed in order to reduce costs each manufacturer, the large segmented half tone of main grid and small square hole shape hollow out half tone, but the cell piece that screen painting goes out otherwise can save silver slurry use amount, but the welding pulling force of positive electrode can not be ensured, cause the increase of welding series resistance simultaneously, thus make component power loss not reach requirement, the half tone being exactly design does not reach optimum efficiency in the consumption saving silver slurry, production cost reduces undesirable.

Summary of the invention

For the deficiencies in the prior art, the invention provides a kind of solar cell main grid hollow out positive electrode half tone, the cell piece that this positive silver-colored half tone graphic printing goes out can save positive silver paste use amount, well save production cost, do not affect the technological requirement of assembly simultaneously, do not increase the power attenuation of assembly, make grid line be connected better with painting tin copper strips.

The present invention realizes like this, a kind of solar cell main grid hollow out positive electrode half tone, comprise three hollow out main gate line be parallel to each other, many secondary grid lines be parallel to each other, described secondary grid line is mutually vertical with main gate line, described hollow out main gate line there is multiple hollow out, form multiple groove in the middle of main gate line after printing-sintering, can be coated with after tin copper strips welds with assembly in described groove and form embedded connection.

Further, main gate line comprises main grid termination, u-shaped connects main grid, thin main gate line; Main grid termination is that tip is located at the u-shaped connection non-openend of main grid; Two u-shapeds connect main grid opening relatively, and center line overlaps, and is connected by thin main gate line, be parallel to each other between four thin main gate line, and between have gap, connected by contiguous block between thin main gate line, u-shaped connects the both sides that main grid is provided with openend and establishes connection two thin main gate line respectively.

Further, the width of thin main gate line is 0.15 millimeter, and the centre distance of adjacent two the thin main gate line in both sides is 0.35 millimeter, and middle two adjacent thin main gate line centre distances are 0.55 millimeter.

Further, the width of main grid termination is 0.4 millimeter.

All right, secondary grid line through the openwork part the thin main gate line in two, hollow out main gate line both sides, but not through openwork part middle two thin main gate line.

All right, be provided with contiguous block between thin main gate line, the thin main gate line contiguous block in two, both sides is staggeredly arranged with middle two thin main gate line contiguous blocks.

The invention has the advantages that, article three, the hollow out main gate line be parallel to each other, many secondary grid lines be parallel to each other, described secondary grid line is mutually vertical with main gate line, hollow out main gate line there is multiple hollow out, form multiple groove in the middle of main gate line after printing-sintering, have multiple groove after printing-sintering in the middle of main gate line, the molten tin when components welding on copper strips is directly absorbed in the groove in the middle of main gate line, form embedded connection, make silver grating line be connected better with painting tin copper strips.

Main gate line comprises main grid termination, u-shaped connects main grid, thin main gate line; Main grid termination is that tip is located at the u-shaped connection non-openend of main grid; Two u-shaped connection main grid openings are relative, and center line overlaps, connected by thin main gate line, be parallel to each other between four thin main gate line, and between have gap, connected by contiguous block between thin main gate line, the both sides that u-shaped connection main grid is provided with openend establish connection two thin main gate line respectively, form four loops and add subsection design, form multiple hollow out, the consumption of precious metal can be reduced in a large number.

Secondary grid line is through the openwork part the thin main gate line in two, hollow out main gate line both sides, but not through openwork part middle two thin main gate line, the embedded when electric conductivity of secondary grid line and hollow out main gate line and more components welding is connected sulculus, make four thin main gate line form multiple loop, ensure silver-colored electric conductivity and improve components welding pulling force.

Be provided with contiguous block between thin main gate line, the thin main gate line contiguous block in two, both sides is staggeredly arranged with middle two thin main gate line contiguous blocks, makes four thin main gate line form multiple loop, ensures the components welding pulling force of silver-colored electric conductivity and raising.

Accompanying drawing explanation

Fig. 1 is a kind of main gate line embodiment of the present invention.

Fig. 2 is a kind of solar cell main grid hollow out half tone using Fig. 1 main gate line of the present invention.

Fig. 3 is the enlarged drawing of P part in Fig. 2 of the present invention.

Specific embodiment

As shown in Figure 1, main gate line comprises main grid termination 1, u-shaped connects main grid 2, thin main gate line 3, main grid termination 1 connects the non-openend of main grid 2 for tip is located at u-shaped, two u-shaped connection main grid 2 openings are relative, and center line overlaps, connected by thin main gate line 3, be parallel to each other between four thin main gate line 3, and between have gap, connected by contiguous block 4 between thin main gate line 3, the both sides that u-shaped connection main grid 2 is provided with openend establish the thin main gate line 3 of connection two respectively, the width of thin main gate line 3 is 0.15 millimeter, the centre distance of adjacent two the thin main gate line 3 in both sides is 0.35 millimeter, middle two adjacent thin main gate line 3 centre distances are 0.55 millimeter, the width of main grid termination 1 is 0.4 millimeter, two, both sides thin main gate line 3 contiguous block 4 is staggeredly arranged with middle two thin main gate line 3 contiguous blocks 4.

As shown in Figure 2, three the hollow out main gate line be parallel to each other, many secondary grid lines be parallel to each other, secondary grid line is straight with the mutual respect of main gate line phase, forms groove after printing-sintering between secondary grid line, can embed and be coated with tin copper sheet in described groove, the wide of main grid termination, two ends 1 of main gate line is 0.4 millimeter, length is four secondary grid lines distances apart, it is three secondary grid lines distances apart that u-shaped connects main grid 2 length, main gate line from the 7th secondary grid line to the 8th secondary grid line the thin main gate line 3 in two, both sides establish contiguous block 4, contiguous block 4 is filling paste, be hollow out between middle adjacent two thin main gate line 3, distance from the 8th to the tenth between secondary grid line is full hollow out, from two, centre between the tenth to the 11 secondary grid line, thin main gate line 3 is middle is contiguous block 4, but be hollow out in the middle of the adjacent two thin main gate line 3 in both sides, be full hollow out from the distance between secondary grid line between the ten one to ten three secondary grid lines, between from the 13 to the tenth fourth officer grid line, the thin main gate line 3 in two, both sides establishes contiguous block 4, be hollow out between middle adjacent two thin main gate line 3, circulate with this until with the main gate line other end.

As shown in Figure 3, secondary grid line through the openwork part the thin main gate line 3 in two, main gate line both sides, but not through openwork part middle two thin main gate line 3.

Claims

1. a solar cell main grid hollow out positive electrode half tone, it is characterized in that: described main grid hollow out half tone comprises three hollow out main gate line be parallel to each other, many secondary grid lines be parallel to each other, described secondary grid line is mutually vertical with main gate line, described hollow out main gate line there is multiple hollow out, form multiple groove in the middle of three main gate line after printing-sintering, embedded silver-colored tin can be formed with painting tin copper strips in the groove described in when components welding and be connected.

2. a kind of solar cell main grid hollow out positive electrode half tone according to claim 1, is characterized in that: described main gate line comprises main grid termination (1), u-shaped connects main grid (2), thin main gate line (3); Main grid termination (1) connects main grid (2) non-openend for tip is located at u-shaped; Two u-shaped connection main grid (2) openings are relative, and center line overlaps, connected by thin main gate line (3), be parallel to each other between four thin main gate line (3), and between have gap, connected by contiguous block (4) between thin main gate line (3), the both sides that u-shaped connection main grid (2) is provided with openend establish connection two thin main gate line (3) respectively.

3. a kind of solar cell main grid hollow out positive electrode half tone according to claim 2, it is characterized in that: the width of described thin main gate line (3) is 0.15 millimeter, the centre distance of adjacent two the thin main gate line (3) in both sides is 0.35 millimeter, and middle two adjacent thin main gate line (3) centre distances are 0.55 millimeter.

4. a kind of solar cell main grid hollow out positive electrode half tone according to claim 2, is characterized in that: the width of described main grid termination (1) is 0.4 millimeter.

5. a kind of solar cell main grid hollow out positive electrode half tone according to claim 2, is characterized in that: two, described both sides thin main gate line (3) contiguous block (4) is staggeredly arranged with middle two thin main gate line (3) contiguous block (4).

6. according to a kind of solar cell main grid hollow out positive electrode half tone one of claim 3-5 Suo Shu, it is characterized in that: described secondary grid line through the openwork part the thin main gate line (3) of two, main gate line both sides, but not through openwork part middle two thin main gate line (3).