CN210245519U - Crystalline silicon battery string connection structure - Google Patents
Crystalline silicon battery string connection structure Download PDFInfo
- Publication number
- CN210245519U CN210245519U CN201920775328.9U CN201920775328U CN210245519U CN 210245519 U CN210245519 U CN 210245519U CN 201920775328 U CN201920775328 U CN 201920775328U CN 210245519 U CN210245519 U CN 210245519U
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- Prior art keywords
- battery
- grids
- main
- main grid
- piece
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- 229910021419 crystalline silicon Inorganic materials 0.000 title claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 28
- 239000012634 fragment Substances 0.000 claims abstract description 18
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- -1 silver-aluminum Chemical compound 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003566 sealing material Substances 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 description 20
- 238000000034 method Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000005022 packaging material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a crystalline silicon battery string connecting structure, which comprises a solar battery piece, wherein the solar battery piece is formed by connecting more than two battery pieces in sequence through short welding belts, the front of each battery piece is provided with a plurality of parallel front side secondary grids and a front side main grid vertical to the front side secondary grids, and the back of each battery piece is provided with a back side main grid; the front main grids are arranged on the left side edges of the battery fragments in the connecting direction, the back main grids are arranged on the right side edges of the battery fragments in the connecting direction, and the back main grids of each battery fragment are connected with the front main grids of the next battery fragment through short welding strips. The utility model discloses a crystalline silica group battery cluster connection structure can increase the battery photic area, reduces to weld and takes series resistance, reduces to weld and takes and sealing material use amount, is favorable to improving subassembly efficiency and reduction in production cost.
Description
Technical Field
The utility model relates to a solar cell technical field especially relates to a can reduce by a wide margin and weld area quantity, reduce battery manufacturing cost's crystalline silicon group battery cluster connection structure.
Background
At present, a common crystalline silicon cell is of a square sheet structure, the thickness is generally about 0.18mm, and the side length has various specifications of 156-166 mm and the like. The main light receiving surface is defined as the front surface, the other corresponding surface is defined as the back surface, the front surface and the back surface are respectively two electrodes of the battery, and current is led out from the main grid after being collected. In practical application, in order to meet the requirement of power supply of electric equipment, a plurality of single solar cells are connected in series and packaged to form a block assembly for use, so that the assembly has specific output voltage and power. In the conventional battery string connection manner as shown in fig. 5 to 7, the solder strip 5 'completely covers the front main grid 3' and the back main grid 4 'of the battery 1', and the solder strip is long and has a large series resistance. If the solder strip is increased, the wider the solder strip is, the shielded area of the light receiving surface of the battery is increased, the power generation efficiency is affected, and the manufacturing cost is increased due to the large consumption of the solder strip and the battery piece packaging material.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a crystalline silicon battery group cluster connection structure, its connected mode that has changed traditional battery group cluster, connection path is shorter, and does not reduce the battery photic area, has improved the generating efficiency, has greatly reduced and has welded area of use and battery manufacturing cost.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
a crystalline silicon battery string connection structure is characterized in that: the solar cell comprises a solar cell slice, wherein the solar cell slice is formed by sequentially connecting more than two cell slices through short welding strips, the front side of each cell slice is provided with a plurality of parallel front side auxiliary grids and a front side main grid vertical to the front side auxiliary grids, and the back side of each cell slice is provided with a back side main grid; the front main grids are arranged on the left side edges of the battery fragments in the connecting direction, the back main grids are arranged on the right side edges of the battery fragments in the connecting direction, the back main grids of each battery fragment are connected with the front main grids of the next battery fragment through short welding strips, and the direction of each short welding strip is perpendicular to the main grid lines.
Preferably, the crystalline silicon battery string connection structure comprises more than two solar cells, and the main grid on the back side of the rearmost cell piece of a single solar cell and the main grid on the front side of the foremost cell piece of the next solar cell are connected through a solder strip.
Preferably, the back main grid of each battery piece is connected with the front main grid of the next battery piece through 2-6 short welding strips, and the length of each short welding strip is 5 mm.
Preferably, the back main grid of the battery piece is 2 or 3 positive electrode wires which are printed by silver-aluminum paste and are positioned on the same straight line, the front auxiliary grid of the battery piece is grid lines which are printed by silver paste and are uniformly spaced, and the front main grid is a negative electrode wire printed by silver paste.
Due to the adoption of the technical scheme, the utility model discloses following technological effect has:
(1) when the back main grid and the front main grid of the adjacent battery fragments are connected, the main grid lines are positioned at the edges of the battery fragments, and the direction of the welding strip is perpendicular to the main grid lines, so that the welding strip can be made very short, the welding strip can be made wider due to the sectional connection, the effective light receiving area of the battery cannot be shielded, the series resistance of the welding strip is small, and the improvement of the power generation power of the assembly is facilitated;
(2) because the series resistance of the solder strip is very small, the solder strip has a room for greatly reducing the thickness of the solder strip, so that the number of the battery pieces is the same, the packaging area of the battery pieces is smaller, and the occupied area of a solar power generation system is smaller;
(3) the packaging area of the battery piece is reduced, the amount of packaging materials required by the battery piece is reduced, the packaging cost of the battery piece is reduced, the length of the welding strip is greatly shortened, the use amount is reduced, and the use cost of the welding strip is reduced.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a single solar cell adopting 5-piece structure according to the present invention;
FIG. 2 is a front view of FIG. 1;
in fig. 3: FIGS. a and b are schematic front and back views of the solar cell of FIG. 1, respectively;
FIG. 4 is a schematic view of another configuration of the back side of the solar cell sheet of FIG. 1;
FIG. 5 is a schematic top view of a conventional string connecting structure described in the background art;
FIG. 6 is a front view of FIG. 5;
in fig. 7: FIGS. c and d are schematic front and back views of the solar cell sheet of FIG. 5, respectively;
the solar cell module comprises a solar cell 1, a cell 11, a front side auxiliary grid 2, a front side main grid 3, a back side main grid 4 and a welding strip 5, wherein the solar cell is a solar cell slice; the solar cell piece comprises a solar cell piece 1 ', a front side auxiliary grid, a front side main grid, a back side main grid and a welding strip, wherein the solar cell piece 2 ', 3 ', 4 ' and 5 ' are traditional solar cell pieces.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1 to 3, the utility model provides a crystalline silicon battery string connection structure, which comprises a solar cell piece 1, wherein the solar cell piece 1 is formed by connecting more than two cell sub-pieces 11 in sequence through short welding belts, the front of each cell sub-piece 11 is provided with a plurality of parallel front auxiliary grids 2 and a front main grid 3 perpendicular to the front auxiliary grids 2, and the back of each cell sub-piece 11 is provided with a back main grid 4; the front main grids 3 are arranged at the left side edges of the battery fragments 11 in the connection direction, the back main grids 4 are arranged at the right side edges of the battery fragments 11 in the connection direction, and the back main grids 4 of each battery fragment 11 are connected with the front main grids 3 of the next battery fragment 11 through short welding strips 5. As shown in fig. 4, the back main grid may be a plurality of back main grids parallel to the front main grid in this embodiment, or may also be a structure perpendicular to the front main grid or other structures, and only one end of the back main grid needs to be located at the back edge of the cell segment, so as to shorten the distance from the front main grid. The utility model discloses use the direction of the positive main bars of perpendicular to as the direction of connection, with in the traditional mode of fig. 4 to 6, with the direction of connection who is on a parallel with positive main bars different.
As shown in fig. 1 to 3, for example, a 5-piece P-type silicon solar cell is adopted, each pair of main grid lines is located at the edge of a small cell, each small cell is also connected through a solder strip, and the direction of the solder strip is perpendicular to the main grid lines, so that the solder strip can be made very short, and the solder strip can be made wider due to the sectional connection, theoretically, the length of the solder strip can be the same as that of the sectional main grid, but the effective light receiving area of the cell is not shielded. Thus, the series resistance of the solder strip is very small, and there is room for greatly reducing the thickness of the solder strip. Specifically, the back main grid of the battery piece is a positive electrode lead printed by silver-aluminum paste, the front auxiliary grid of the battery piece is grid lines printed by silver paste at uniform intervals, and the front main grid is a negative electrode lead printed by silver paste. The same applies to N-type silicon solar cells, except that the polarity of the front and back electrodes is reversed. The utility model discloses a group's cluster connection structure is applicable to two-sided battery equally.
When the utility model discloses a crystalline silica group battery cluster connection structure includes two or more solar wafer, through welding the positive main grid that the area connects the back main grid of single solar wafer's rearmost end battery burst and the foremost battery of next solar wafer divides the piece, the positive negative pole of solar wafer is through short welding the area connection promptly.
For example, a conventional solder ribbon has a length of about 300mm, a thickness of 0.24mm, and a width of 1mm, and the series resistance of 5 solder ribbons is 4.35 milliohms. And the utility model discloses in, if adopt 6 single length 5mm, thickness 0.1mm, width 5 mm's short solder strip, connect five groups and take 25 mm's long battery altogether, solder strip series resistance only 0.15 milliohm, the subassembly power improves about 2 watts. The space between the welding strip thinned batteries can be shortened to 0.3mm from the traditional 2mm space, the area of the sealing material is more effectively utilized, the total using amount of the welding strip in the process is greatly reduced, the thickness of the welding strip is reduced, and the material of the sealing material is reduced.
The present invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification, and to any novel method or process steps or any novel combination of features disclosed.
Claims (4)
1. A crystalline silicon battery string connection structure is characterized in that: the solar cell comprises a solar cell slice, wherein the solar cell slice is formed by sequentially connecting more than two cell slices through short welding strips, the front side of each cell slice is provided with a plurality of parallel front side auxiliary grids and a front side main grid vertical to the front side auxiliary grids, and the back side of each cell slice is provided with a back side main grid; the front main grids are arranged on the left side edges of the battery fragments in the connecting direction, the back main grids are arranged on the right side edges of the battery fragments in the connecting direction, the back main grids of each battery fragment are connected with the front main grids of the next battery fragment through short welding strips, and the direction of each short welding strip is perpendicular to the main grid lines.
2. The crystalline silicon battery string connection structure as defined in claim 1, wherein: the crystalline silicon battery string connection structure comprises more than two solar battery pieces, and a main grid on the back of the rearmost battery piece of a single solar battery piece and a main grid on the front of the foremost battery piece of the next solar battery piece are connected through a welding strip.
3. The crystalline silicon battery string connection structure as defined in claim 1, wherein: the back main grid of each battery piece is connected with the front main grid of the next battery piece through 2-6 short welding strips, and the length of each short welding strip is 5 mm.
4. The crystalline silicon battery string connection structure as defined in claim 1, wherein: the back main grids of the battery slices are 2 or 3 positive electrode wires which are printed by silver-aluminum paste and are positioned on the same straight line, the front auxiliary grids of the battery slices are grid lines which are printed by silver paste and are uniformly spaced, and the front main grids are negative electrode wires printed by silver paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920775328.9U CN210245519U (en) | 2019-05-28 | 2019-05-28 | Crystalline silicon battery string connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920775328.9U CN210245519U (en) | 2019-05-28 | 2019-05-28 | Crystalline silicon battery string connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210245519U true CN210245519U (en) | 2020-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920775328.9U Expired - Fee Related CN210245519U (en) | 2019-05-28 | 2019-05-28 | Crystalline silicon battery string connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210245519U (en) |
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2019
- 2019-05-28 CN CN201920775328.9U patent/CN210245519U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200716 Address after: 214400 12-1, 988 Gangcheng Avenue, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Jiangyin Chuxu Intelligent Technology Co.,Ltd. Address before: 214400 Room 102, Building 2, Binjiang West Road, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: Jiangyin Yuequ Consulting Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200403 |