CN110556442A - Main-grid-free crystalline silicon cell and application thereof - Google Patents
Main-grid-free crystalline silicon cell and application thereof Download PDFInfo
- Publication number
- CN110556442A CN110556442A CN201910853718.8A CN201910853718A CN110556442A CN 110556442 A CN110556442 A CN 110556442A CN 201910853718 A CN201910853718 A CN 201910853718A CN 110556442 A CN110556442 A CN 110556442A
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- battery
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- 229910021419 crystalline silicon Inorganic materials 0.000 title claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- 239000013078 crystal Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022433—Particular geometry of the grid contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Sustainable Energy (AREA)
- Photovoltaic Devices (AREA)
Abstract
the invention provides a crystal silicon cell without a main grid, a cell string using the cell and a solar cell module. The shading area of the front side of the battery piece can be reduced, and the unit area generating capacity of the battery piece and the assembly is further improved; the invention can maximize the laying density of the battery pieces in the battery string in the horizontal direction; the invention can also avoid the problem that one of two adjacent battery pieces shields the other battery piece due to the tile stacking technology, namely, the waste of the area of the battery pieces due to the tile stacking technology is avoided.
Description
Technical Field
The invention relates to a crystal silicon cell without a main grid and application thereof.
Background
Solar modules (also called solar panels, photovoltaic modules) are the core part of solar power generation systems. The solar cell module comprises a cell string, and the cell string is composed of a plurality of crystalline silicon cells which are sequentially laid in series.
The front of the crystalline silicon battery piece is generally provided with wider main grid lines and thinner fine grid lines, the main grid lines increase the shading area of the front of the battery piece, and the unit area generated energy of the battery piece and the component can be reduced.
In addition, two adjacent battery pieces in the battery string are generally connected in series through the conductive connecting piece, the conductive connecting piece extends from the front surface of one battery piece to the back surface of the other battery piece, and the conductive connecting piece penetrates through the front surfaces of the battery pieces, so that the light shading area of the front surfaces of the battery pieces is increased through the conductive connecting piece, and the unit area power generation of the battery pieces and the assembly is reduced.
in addition, the existing connection mode of the battery string mainly comprises two modes of tiling and tiling.
in the flat laying method, since two adjacent battery pieces are spaced apart from each other in the horizontal direction (with the conductive connection member interposed therebetween), the density of laying the battery pieces is not maximized.
In the tile-stacking mode, one of two adjacent battery pieces can shield the other battery piece, which can cause the waste of the area of the battery pieces.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a main-grid-free crystalline silicon battery piece, which is rectangular as a whole and comprises a pair of side lines which are parallel to each other: a first edge line and a second edge line; the back surface of the battery piece is provided with a back electrode;
The front surface of the battery piece is provided with a plurality of first thin grid lines which are parallel to each other, the plurality of first thin grid lines are perpendicular to the first edge line, and the plurality of first thin grid lines are uniformly distributed along the extending direction of the first edge line; and the end part of each first thin grid line close to the first side line is widened to form a thin grid head, and the thin grid head is used as a front electrode of the cell.
the battery piece is not provided with the main grid line, so that the shading area of the front side of the battery piece can be prevented from being increased due to the arrangement of the main grid; the front electrode of the invention is close to the side line of the battery piece, namely the front electrode is an edge electrode, and the conductive connecting piece can be only connected with the front electrode when being connected with the front of the battery piece, namely the conductive connecting piece can be only connected with the edge of the front of the battery piece and does not need to penetrate through the front of the battery piece, so that the shading area of the front of the battery piece can be prevented from being increased because the conductive connecting piece penetrates through the front of the battery piece; therefore, the shading area of the front side of the battery piece can be reduced, and the unit area generating capacity of the battery piece and the assembly is further improved.
preferably, at least one second thin grid line is further arranged between two adjacent first thin grid lines, and the second thin grid line is parallel to the first thin grid lines; the positive of battery piece still is equipped with: and a third thin gate line connecting the second thin gate line and the first thin gate line.
Preferably, the third fine gate line connects each first fine gate line.
Preferably, four corners of the battery piece are right angles or round corners.
preferably, the whole battery piece is rectangular, and the first sideline and the second sideline are long sides of the battery piece.
Preferably, the second thin gate line is parallel to the first edge line.
Preferably, the width of the battery piece is 10-160 mm.
preferably, the length of the battery piece is 10-320 mm.
Preferably, the battery piece is formed by cutting silicon rod edge skin materials.
The invention also provides a battery string which is formed by connecting at least two battery pieces in series, wherein the battery pieces are the crystal silicon battery pieces without the main grid; the series connection structure of two adjacent battery pieces is as follows:
The two adjacent battery pieces comprise: a first cell piece and a second cell piece;
The back electrode of the first battery piece is electrically connected with each front electrode of the second battery piece through a conductive connecting piece; the conductive connecting member includes: the battery comprises a main body part connected with the back electrode of the first battery piece and a plurality of extension parts which extend from the main body part and are connected with the front electrodes of the second battery piece in a one-to-one correspondence manner;
The second sideline of the first battery piece is arranged above the first sideline of the second battery piece, and the second sideline of the first battery piece is vertically aligned with the first sideline of the second battery piece.
The sidelines (the second sideline of the first battery piece and the first sideline of the second battery piece) at the opposite ends of two adjacent battery pieces in the battery string are aligned up and down, so that the laying density of the battery pieces can be maximized in the horizontal direction;
And the sidelines (namely the second sideline of the first battery piece and the first sideline of the second battery piece) of the opposite ends of the two adjacent battery pieces are aligned up and down, namely the two adjacent battery pieces are not shielded, so that the problem that one battery piece shields the other battery piece (namely the first battery piece shields the second battery piece) in the two adjacent battery pieces due to the tile-stacking technology can be avoided, and the waste of the area of the battery pieces is avoided.
The invention also provides a solar cell module which comprises a cell string, wherein the cell string is the above cell string adopting the crystal silicon cell without the main grid.
Preferably, the second edge line of the first cell piece is supported by an electrically conductive connecting piece and/or a supporting structure arranged in the solar cell module.
the invention has the advantages and beneficial effects that: the invention provides a crystal silicon cell without a main grid, a cell string using the cell and a solar cell module, which can reduce the shading area of the front side of the cell and further improve the unit area generating capacity of the cell and the module; the invention can maximize the laying density of the battery pieces in the battery string in the horizontal direction; the invention can also avoid the problem that one of two adjacent battery pieces shields the other battery piece due to the tile stacking technology, namely, the waste of the area of the battery pieces due to the tile stacking technology is avoided.
Drawings
FIGS. 1 and 2 are schematic diagrams of a silicon wafer without a main gate;
Fig. 3 is a schematic diagram of a series connection structure of two adjacent battery slices in the battery string.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
as shown in fig. 1 and 2, the present invention provides a main-grid-free crystalline silicon cell, wherein the cell is rectangular as a whole, and the cell comprises a pair of side lines parallel to each other: a first edge line 101 and a second edge line 102; the first border line 101 and the second border line 102 are long sides of the battery piece; the four corners of the battery piece are right angles (the four corners of the battery piece can also be round corners); the back surface of the battery piece is provided with a back electrode;
the front surface of the battery piece is provided with a plurality of first thin grid lines 201 which are parallel to each other, the plurality of first thin grid lines 201 are perpendicular to the first sidelines 101, and the plurality of first thin grid lines 201 are uniformly distributed along the extending direction of the first sidelines 101; each first thin grid line 201 becomes wider at the end part close to the first side line 101 to form a thin grid head 300, and the thin grid head 300 is used as the front electrode of the cell;
At least one second thin gate line 202 is also arranged between two adjacent first thin gate lines 201, and the second thin gate line 202 is parallel to the first thin gate lines 201;
the positive of battery piece still is equipped with: a third thin gate line 203 connecting the second thin gate line 202 and the first thin gate line 201;
The third thin gate line 203 may connect only a portion of the first thin gate line 201, as shown in fig. 1; it should be noted that fig. 1 is only an example, and does not indicate that "the third thin gate line connecting portion first thin gate line" has only one form shown in fig. 1, and other forms that can realize "the third thin gate line connecting portion first thin gate line" are also within the protection scope of the present invention;
the third fine gate line 203 may also connect each first fine gate line 201, as shown in fig. 2; it should be noted that fig. 2 is also only an example, and it does not mean that "the third fine gate line is connected to each first fine gate line" only has one form shown in fig. 2, and other forms that "the third fine gate line is connected to each first fine gate line" are also within the protection scope of the present invention.
The width of the battery piece can be one half, one third, one fourth, one fifth, one sixth, one seventh, one eighth, one ninth, one tenth, one eleventh or one twelfth of the width of a conventional square piece or a quasi-square piece (for example, the width of the battery piece is 10-160 mm).
The length of the battery piece can be 100-320 mm.
the battery piece can be cut from silicon rod flaw-piece material.
The battery piece is not provided with the main grid line, so that the shading area of the front side of the battery piece can be prevented from being increased due to the arrangement of the main grid; the front electrode 300 is close to the edge line 101 of the battery piece, namely the front electrode 300 is an edge electrode, and the conductive connecting piece can be only connected with the front electrode 300 when being connected with the front of the battery piece, namely the conductive connecting piece can be only connected with the edge of the front of the battery piece and does not need to penetrate through the front of the battery piece, so that the shading area of the front of the battery piece can be prevented from being increased because the conductive connecting piece penetrates through the front of the battery piece; therefore, the shading area of the front side of the battery piece can be reduced, and the unit area generating capacity of the battery piece and the assembly is further improved.
As shown in fig. 3, the invention further provides a battery string, which is formed by connecting at least two battery pieces in series, wherein the battery pieces are the above-mentioned crystalline silicon battery pieces without main grid; the series connection structure of two adjacent battery pieces in the battery string is as follows:
The two adjacent battery pieces comprise: a first cell piece 10 and a second cell piece 20;
The back electrode of the first cell piece 10 is electrically connected with each front electrode of the second cell piece 20 through a conductive connecting piece 30; the conductive connection member 30 includes: a main body part connected with the back electrode of the first cell piece 10, and a plurality of extension parts extending from the main body part and connected with the front electrodes of the second cell piece 20 in a one-to-one correspondence manner;
the second borderline 12 of the first battery piece 10 is disposed above the first borderline 21 of the second battery piece 20, and the second borderline 12 of the first battery piece 10 is aligned with the first borderline 21 of the second battery piece 20.
The sidelines (the second sideline 12 of the first battery piece 10 and the first sideline 21 of the second battery piece 20) of the two adjacent battery piece opposite ends in the battery string are aligned up and down, so that the laying density of the battery pieces can be maximized in the horizontal direction;
And the sidelines of the opposite ends of the two adjacent battery pieces (i.e. the second sideline 12 of the first battery piece 10 and the first sideline 21 of the second battery piece 20) are aligned up and down, i.e. the two adjacent battery pieces are not shielded, so that the problem that one battery piece shields the other battery piece (i.e. the first battery piece 10 shields the second battery piece 20) in the two adjacent battery pieces due to the tile-stacking technology can be avoided, and the waste of the area of the battery pieces is avoided.
The invention also provides a solar cell module which comprises a cell string, wherein the cell string is the above cell string adopting the crystal silicon cell without the main grid.
preferably, the second side line 12 of the first cell piece 10 is supported by the conductive connection member 30 and/or a support structure provided in the solar cell module.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (12)
1. The crystal silicon battery piece without the main grid is integrally rectangular and comprises a pair of side lines which are parallel to each other: a first edge line and a second edge line; the back surface of the battery piece is provided with a back electrode; the method is characterized in that:
The front surface of the battery piece is provided with a plurality of first thin grid lines which are parallel to each other, the plurality of first thin grid lines are perpendicular to the first edge line, and the plurality of first thin grid lines are uniformly distributed along the extending direction of the first edge line; and the end part of each first thin grid line close to the first side line is widened to form a thin grid head, and the thin grid head is used as a front electrode of the cell.
2. the crystalline silicon battery piece without the main grid according to claim 1, characterized in that at least one second thin grid line is arranged between two adjacent first thin grid lines, and the second thin grid line is parallel to the first thin grid line;
The positive of battery piece still is equipped with: and a third thin gate line connecting the second thin gate line and the first thin gate line.
3. The crystal silicon cell without the main grid according to claim 2, wherein the third thin grid line is connected with each first thin grid line.
4. The gridless crystalline silicon cell of claim 1, wherein the four corners of the cell are right-angled or rounded.
5. The gridless crystalline silicon cell of claim 1, wherein the cell is rectangular in shape as a whole, and the first and second edges are long edges of the cell.
6. The silicon wafer without the main grid according to claim 1, wherein the second thin grid line is parallel to the first side line.
7. the crystal silicon cell without the main grid as claimed in claim 1, wherein the width of the cell is 10-160 mm.
8. The crystal silicon cell without the main grid as claimed in claim 1, wherein the length of the cell is 10-320 mm.
9. The silicon crystal solar cell without the main grid as claimed in claim 1, wherein the cell is cut from silicon rod offcuts.
10. The battery string is formed by connecting at least two battery pieces in series, and is characterized in that the battery pieces are the crystal silicon battery pieces without the main grid in any one of claims 1 to 9; the series connection structure of two adjacent battery pieces is as follows:
The two adjacent battery pieces comprise: a first cell piece and a second cell piece;
The back electrode of the first battery piece is electrically connected with each front electrode of the second battery piece through a conductive connecting piece; the conductive connecting member includes: the battery comprises a main body part connected with the back electrode of the first battery piece and a plurality of extension parts which extend from the main body part and are connected with the front electrodes of the second battery piece in a one-to-one correspondence manner;
the second sideline of the first battery piece is arranged above the first sideline of the second battery piece, and the second sideline of the first battery piece is vertically aligned with the first sideline of the second battery piece.
11. A solar module comprising a string of cells, wherein the string of cells is the string of cells of claim 10.
12. The solar module according to claim 11, wherein the second edge of the first cell piece is supported by an electrically conductive connection and/or a support structure provided in the solar module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910853718.8A CN110556442B (en) | 2019-09-10 | 2019-09-10 | Main-grid-free crystalline silicon cell and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910853718.8A CN110556442B (en) | 2019-09-10 | 2019-09-10 | Main-grid-free crystalline silicon cell and application thereof |
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| Publication Number | Publication Date |
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| CN110556442A true CN110556442A (en) | 2019-12-10 |
| CN110556442B CN110556442B (en) | 2021-09-24 |
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| CN201910853718.8A Active CN110556442B (en) | 2019-09-10 | 2019-09-10 | Main-grid-free crystalline silicon cell and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115241294A (en) * | 2022-07-21 | 2022-10-25 | 常州时创能源股份有限公司 | Photovoltaic laminated tile assembly and preparation method thereof |
| WO2022237243A1 (en) * | 2021-05-12 | 2022-11-17 | 通威太阳能（合肥）有限公司 | Shingled cell, cell strip, and shingled photovoltaic assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5391235A (en) * | 1992-03-31 | 1995-02-21 | Canon Kabushiki Kaisha | Solar cell module and method of manufacturing the same |
| CN206401326U (en) * | 2016-12-30 | 2017-08-11 | 青岛瑞元鼎泰新能源科技有限公司 | Solar energy is without main gate line crystal-silicon battery slice |
| CN209266426U (en) * | 2018-12-10 | 2019-08-16 | 上海晶澳太阳能科技有限公司 | Solar battery string and solar cell module |
-
2019
- 2019-09-10 CN CN201910853718.8A patent/CN110556442B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5391235A (en) * | 1992-03-31 | 1995-02-21 | Canon Kabushiki Kaisha | Solar cell module and method of manufacturing the same |
| CN206401326U (en) * | 2016-12-30 | 2017-08-11 | 青岛瑞元鼎泰新能源科技有限公司 | Solar energy is without main gate line crystal-silicon battery slice |
| CN209266426U (en) * | 2018-12-10 | 2019-08-16 | 上海晶澳太阳能科技有限公司 | Solar battery string and solar cell module |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022237243A1 (en) * | 2021-05-12 | 2022-11-17 | 通威太阳能（合肥）有限公司 | Shingled cell, cell strip, and shingled photovoltaic assembly |
| CN115241294A (en) * | 2022-07-21 | 2022-10-25 | 常州时创能源股份有限公司 | Photovoltaic laminated tile assembly and preparation method thereof |
| CN115241294B (en) * | 2022-07-21 | 2024-05-17 | 常州时创能源股份有限公司 | Photovoltaic shingle assembly and preparation method thereof |
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| Publication number | Publication date |
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| CN110556442B (en) | 2021-09-24 |
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