CN114695574A - Heterojunction battery piece without main grid - Google Patents
Heterojunction battery piece without main grid Download PDFInfo
- Publication number
- CN114695574A CN114695574A CN202210448189.5A CN202210448189A CN114695574A CN 114695574 A CN114695574 A CN 114695574A CN 202210448189 A CN202210448189 A CN 202210448189A CN 114695574 A CN114695574 A CN 114695574A
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- 230000000694 effects Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
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- Engineering & Computer Science (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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a heterojunction battery piece without a main grid, which comprises a battery piece without the main grid, wherein the four corners of the battery piece without the main grid are provided with large chamfers, the battery piece without the main grid comprises a main area and edge areas, the two sides of the battery piece without the main grid are respectively the edge areas, the main area is arranged between the edge areas at the two sides, and the main area is provided with a plurality of first thin grids which are arranged in parallel; the edge area is a part between an upper chamfer and a lower chamfer of the main-grid-free battery piece, and a plurality of second fine grids which are arranged in parallel are arranged on the edge area; the distance between two adjacent second fine grids is smaller than the distance between two adjacent first fine grids, and the number of the second fine grids in the edge area is larger than that of the first fine grids. According to the invention, the current collection effect of the edge area is improved by reducing the distance between the fine grids in the edge area of the battery and increasing the number of the fine grids, the problem of shadow of the edge of the battery without a main grid assembly of a large-chamfer-size battery piece is solved, the assembly power is improved, and the assembly reliability is improved.
Description
Technical Field
The invention relates to the technical field of photovoltaic cells, in particular to a heterojunction cell without a main grid.
Background
With the wide application of solar energy, the solar photovoltaic panel industry is also developed vigorously, cost reduction and efficiency improvement are the common research directions in the industry, and the main grid-free technology is a new generation high-efficiency component technology developed in the industry at present, because a battery has no main grid, the current transmission distance is short, and the flexible connection small distance can reduce the cost and increase the component efficiency.
The design of the mainstream non-main-grid battery is that the distance between fine grids of the battery is uniform and the number of the fine grids is uniformly distributed, and alloy contact is directly formed by a welding strip and the fine grids to achieve the current transmission effect when an assembly is manufactured. For example, a 166 multi-master grid assembly is welded by nine welding strips, and a 166 non-master grid assembly is welded by sixteen or more welding strips to ensure the current collection effect.
The battery piece with the size of 156.75, 166 and 182 has large chamfers at four corners due to a silicon rod slicing process, as shown in fig. 1, when a component is manufactured and welded with the battery piece with the large chamfer, the distance N from the edge of the battery to a first solder strip is usually ensured to be larger than the chamfer width M, otherwise, the problem that the lamination broken piece is easily cracked when the solder strip is pressed to the chamfer bevel edge in the production process of the component is solved, although the problem that the current collection effect is poor due to the small contact area of the solder strip and the fine grid in the middle area of the battery can be solved by adopting the conventional design without a main grid through increasing the number of the solder strips and reducing the length H of the fine grid between the solder strips, the current collection at the edge is still poor, the current collection at the middle area and the edge area is uneven, the shadow occurs at the edge of the battery piece, and the current collection effect at two sides of the battery piece is poor due to the larger N, and the component power is also affected.
Disclosure of Invention
The invention aims to overcome the defects and provide a heterojunction battery piece without a main grid, so that the problem of EL shadow at the edge of a component without the main grid is solved, the edge current collection effect is improved, and the purpose of improving the component power is achieved.
The purpose of the invention is realized as follows:
a heterojunction battery piece without a main grid comprises a battery piece without a main grid, wherein large chamfers are arranged at four corners of the battery piece without the main grid, the battery piece without the main grid comprises a main area and edge areas, the edge areas are respectively arranged at two sides of the battery piece without the main grid, the main area is arranged between the edge areas at the two sides, and a plurality of first thin grids which are arranged in parallel are arranged on the main area; the edge area is a part between an upper chamfer and a lower chamfer of the non-main gate battery plate, and a plurality of second fine gates which are arranged in parallel are arranged on the edge area; the distance between two adjacent second fine grids is smaller than that between two adjacent first fine grids, and the number of the second fine grids in the edge area is larger than that of the first fine grids.
Furthermore, two ends of each first fine grid are respectively connected with the second fine grids through oblique lines, and one end of each first fine grid is connected with the upper and lower second fine grids close to the first fine grid.
Further, the line width of the second fine gate is greater than the line width of the first fine gate.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the current collection effect of the edge area is improved by reducing the distance between the fine grids in the edge area of the battery and increasing the number of the fine grids, the problem of shadow of the edge of the battery without the main grid assembly of the large-chamfer-size battery piece is solved, and the power of the main grid assembly-free battery of the large-chamfer-size battery piece is improved.
Drawings
Fig. 1 is a schematic structural view of a conventional battery cell.
Fig. 2 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 4 is a schematic connection diagram of oblique lines in embodiment 2 of the present invention.
Fig. 5 is a schematic structural diagram of embodiment 3 of the present invention.
Wherein:
the solar cell comprises a main grid-free cell chip 1, a main region 2, a first fine grid 21, an edge region 3, a second fine grid 31 and a diagonal line 4.
Detailed Description
For a better understanding of the technical aspects of the present invention, reference will now be made in detail to the accompanying drawings. It should be understood that the following specific examples are not intended to limit the specific embodiments of the present invention, but are merely exemplary embodiments that may be employed in the present invention. It should be noted that the description of the positional relationship of the components, such as the component a is located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.
Example 1:
referring to fig. 2, fig. 2 is a schematic diagram illustrating the structure of a heterojunction cell without a main gate in example 1. As shown in the figure, the heterojunction battery piece without the main grid in the embodiment 1 comprises a battery piece without the main grid 1, wherein large chamfers are arranged at four corners of the battery piece without the main grid 1, the battery piece without the main grid 1 is provided with a battery piece front surface and a battery piece back surface, and fine grids are arranged on the battery piece front surface and the battery piece back surface; the non-main-grid battery piece 1 comprises a main area 2 and edge areas 3, the edge areas 3 are respectively arranged on two sides of the non-main-grid battery piece 1, the main area 2 is arranged between the edge areas 3 on two sides, and a plurality of first thin grids 21 which are arranged in parallel are arranged on the main area 2.
The edge region 3 is a part between an upper chamfer and a lower chamfer of the non-main grid cell 1, and a plurality of second fine grids 31 which are arranged in parallel are arranged on the edge region 3.
The distance between two adjacent second fine gates 31 is smaller than the distance between two adjacent first fine gates 21, so the number of second fine gates 31 in the edge region 3 is greater than the number of first fine gates 21.
Example 2:
referring to fig. 3-4, fig. 3 depicts a schematic structural view of a heterojunction cell without a main gate of example 2. As shown in the figure, the difference between this embodiment 2 and embodiment 1 is that two ends of each first fine grid 21 are respectively connected to the second fine grids 31 through oblique lines 4, one end of each first fine grid 21 is connected to the upper and lower second fine grids 31 close thereto, and the two oblique lines 4 connected to the end of each first fine grid 21 form an acute angle.
Example 3:
referring to fig. 5, fig. 5 depicts a schematic structural diagram of a heterojunction cell without a main gate of example 3. As shown in the figure, the difference between the present embodiment 3 and the present embodiment 3 is that the line width of the second fine gate 31 is greater than the line width of the first fine gate 21.
The working principle is as follows:
the current collection effect of the edge area is improved by reducing the distance between the fine grids in the edge area of the battery and increasing the number of the fine grids; according to the invention, the number of the thin grids is increased by reducing the distance between the thin grids at two side regions of the battery, and the cross contact between the welding strip and the thin grids is changed into the cross contact between the bevel openings by oblique line design, so that the contact area between the welding strip and the thin grids is increased, and the current collection effect of the edge region is improved; according to the invention, the current collection effect of the edge position is improved by increasing the line width of the fine grid in the edge area of the battery.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (3)
1. A heterojunction battery piece without a main grid is characterized in that: the grid-free solar cell comprises a grid-free cell sheet (1), wherein large chamfers are arranged at four corners of the grid-free cell sheet (1), the grid-free cell sheet (1) comprises a main area (2) and edge areas (3), the edge areas (3) are respectively arranged at two sides of the grid-free cell sheet (1), the main area (2) is arranged between the edge areas (3) at two sides, and a plurality of first thin grids (21) which are arranged in parallel are arranged on the main area (2); the edge region (3) is a part between an upper chamfer and a lower chamfer of the non-main grid battery plate (1), and a plurality of second fine grids (31) which are arranged in parallel are arranged on the edge region (3); the distance between two adjacent second fine grids (31) is smaller than the distance between two adjacent first fine grids (21), and the number of the second fine grids (31) in the edge area (3) is larger than that of the first fine grids (21).
2. The heterojunction cell of claim 1, wherein: two ends of each first fine grid (21) are respectively connected with the second fine grids (31) through oblique lines (4), and one end of each first fine grid (21) is connected with the upper and lower second fine grids (31) close to the first fine grid.
3. The heterojunction cell of claim 1, wherein: the line width of the second fine grid (31) is larger than that of the first fine grid (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210448189.5A CN114695574A (en) | 2022-04-27 | 2022-04-27 | Heterojunction battery piece without main grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210448189.5A CN114695574A (en) | 2022-04-27 | 2022-04-27 | Heterojunction battery piece without main grid |
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| Publication Number | Publication Date |
|---|---|
| CN114695574A true CN114695574A (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210448189.5A Pending CN114695574A (en) | 2022-04-27 | 2022-04-27 | Heterojunction battery piece without main grid |
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| CN (1) | CN114695574A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024074055A1 (en) * | 2022-10-08 | 2024-04-11 | 浙江制能科技有限公司 | Connection structure for battery and solder strips, and battery assembly comprising connection structure |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024074055A1 (en) * | 2022-10-08 | 2024-04-11 | 浙江制能科技有限公司 | Connection structure for battery and solder strips, and battery assembly comprising connection structure |
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Address after: 313100 zheneng Smart Energy Technology Industrial Park, Meishan Town, Changxing County, Huzhou City, Zhejiang Province Applicant after: Zhejiang Aikang Photoelectric Technology Co.,Ltd. Applicant after: Huzhou Aikang Photoelectric Technology Co.,Ltd. Applicant after: Zhejiang Aikang New Energy Technology Co.,Ltd. Address before: 313100 zheneng Smart Energy Technology Industrial Park, Meishan Town, Changxing County, Huzhou City, Zhejiang Province Applicant before: Zhejiang Aikang Photoelectric Technology Co.,Ltd. Applicant before: Huzhou Aikang Photoelectric Technology Co.,Ltd. Applicant before: JIANGYIN AKCOME SCIENCE AND TECHNOLOGY Co.,Ltd. |