CN213583810U

CN213583810U - Double-row main grid line

Info

Publication number: CN213583810U
Application number: CN202022023025.7U
Authority: CN
Inventors: 徐建美; 高纪凡; 张学玲
Original assignee: Trina Solar Co Ltd
Current assignee: Trina Solar Co Ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-06-29
Anticipated expiration: 2030-09-15

Abstract

The utility model provides a double row busbar, which belongs to the technical field of solar cells. The main grid line is composed of two grid lines that are parallel to each other, and a channel for soldering ribbon welding is formed between the two grid lines. The utility model divides a main grid line into two designs, the grid line material does not increase, and the middle channel forms a positioning function for the welding tape when the welding tape is welded, which is beneficial to welding and good body recombination.

Description

Double-row main grid line

Technical Field

The utility model belongs to the technical field of solar cell, a double row formula main grid line is related to.

Background

The front main grid line of solar cell is < 100um usually, and the main grid line shaping back, the cross-section is round and sharp, and is inhomogeneous moreover, and the subassembly end is used for connecting the solder strip of battery piece has adopted circular solder strip again, consequently in actual welding process, can lead to welding the effect not good, the problem of circular solder strip skew.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, provide a double row formula main grid line.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

a double-row main grid line is composed of two parallel grid lines, and a channel for welding a welding strip is formed between the two grid lines.

Furthermore, the width of the channel is less than twice of the width of a single grid line.

Furthermore, the width of the channel is not less than the width of a single grid line and is less than twice of the width of the single grid line.

And furthermore, the two grid lines are provided with bonding pads which are electrically connected with the grid lines, and four corners of each bonding pad are provided with four hollow parts.

Furthermore, the hollow-out part has a right angle part, and one line of the right angle part is parallel to the grid line.

Furthermore, the central line of the bonding pad is coincident with the central line of the channel.

Further, the width of the grid line is 50 μm.

Further, the width of the channel is 50 microns.

Compared with the prior art, the utility model has the advantages of:

1. a main grid line is divided into two parts, the materials of the grid line are not increased, and a middle channel has a positioning effect on a welding strip when the welding strip is welded, so that the welding is facilitated, and the body composite is good.

2. The 4 corners of the bonding pad are removed, so that the slurry consumption is reduced, the width is unchanged or widened, and the bonding can be carried out when the bonding strip is deviated.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is another schematic structural diagram of the present invention;

fig. 3 is a working principle diagram of the present invention.

In the figure, a gate line 1, a channel 2, a pad 3, a hollow portion 4, a right angle portion 5, and a solder strip 100.

Detailed Description

As shown in fig. 1, the double-row main grid line is composed of two grid lines 1 parallel to each other, the sum of the widths of the two grid lines 1 is exactly equal to the width of one main grid line, and a channel 2 for welding a welding strip is formed between the two grid lines 1.

The center line of the pad 3 coincides with the center line of the channel 2, and the width of the gate line 1 is 50 μm, so that two gate lines 1 correspond to a main gate line having a width of 100 μm.

In this embodiment, divide into two grid lines 1 with a main grid line, the total thick liquids quantity does not increase, forms the depressed part between two grid lines 1, also is passageway 2, and this passageway 2 can block the area of welding to the area is welded in the location, is favorable to the welding, and in addition, the body is compound also better.

It should be noted that the distance between two grid lines 1, i.e. the width of the channel 2, should be within a certain range and not greater than the width of the solder strip 100, which would result in no soldering. Preferably, the width of the channel 2 is not less than the width of the single gate line 1, and is less than twice the width of the single gate line 1. More preferably, the width of the channel is 50 microns.

As shown in fig. 2, two grid lines 1 are provided with a pad 3, the pad 3 is electrically connected with the grid lines 1, four corners of the pad 3 are provided with four hollow parts 4, that is, each corner is provided with one hollow part, and the hollow parts 4 do not need to use silver paste, so that the amount of the silver paste can be reduced. The existing bonding pads are rectangular, and after the head and tail bonding pad bodies are enlarged, slurry is added, the shading area is increased, the battery body composition is increased, and the battery efficiency is reduced. The embodiment adopts a non-rectangular design, the total width can be kept unchanged or even slightly increased through the design of the hollow part, but the deviation is also prevented due to the adoption of the design that the middle part is wide and the two sides are narrow, and the defects that slurry is increased, the light shielding area is increased and the battery efficiency is reduced in the prior art can be overcome.

The hollow portion 4 has a right angle portion 5, and one line of the right angle portion 5 is parallel to the gate line 1. When the bonding pad 3 is used head and tail, the harpoon can be directly connected with the edge of the right angle part parallel to the grid line, so that the width of the harpoon is reduced, and the probability of deviation is reduced.

As shown in fig. 3, the solder strip 100 connects two gate lines 1 along the channel 2, and the width of the two gate lines 1 is the same as that of the previous one of the main gate lines.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a double row formula main grid line which characterized in that, this main grid line comprises two grid lines (1) that are parallel to each other, forms between two grid lines (1) and supplies to weld and take welded passageway (2), is equipped with pad (3) on two grid lines (1), and pad (3) are connected with grid line (1) electricity.

2. A double row bus bar as claimed in claim 1, wherein the width of the channel (2) is less than twice the width of a single bus bar (1).

3. A double row bus bar as claimed in claim 2, wherein the width of the channel (2) is not less than the width of a single gate line (1) and is less than twice the width of a single gate line (1).

4. A double row bus bar as claimed in claim 1, wherein the bonding pad (3) has four cutouts (4) at four corners.

5. A double row bus bar as claimed in claim 4 wherein the cutouts (4) have a right angle portion (5), one of the lines of the right angle portion (5) being parallel to the bar (1).

6. A double row bus bar as claimed in claim 4, wherein the centre line of the pad (3) coincides with the centre line of the via (2).

7. A double row bus bar as claimed in claim 1, wherein the width of the gate line (1) is 50 μm.

8. A dual column bus bar as set forth in claim 1 wherein said channel has a width of 50 microns.