Back electrode of solar cell and solar cell
By setting up spaced-distributed bumps on the back electrode of the solar cell and reducing the electrode strips, the problem of excessive use of silver paste is solved, and the effect of reducing the use of silver paste and the cost of use is achieved.
Patent Information
- Application Number
- CN202421408055.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The back electrode design of existing solar cell cells leads to excessive use of silver paste, causing waste and high usage costs.
A back electrode of a solar cell is designed, and the amount of silver paste used is reduced by setting multiple spaced bumps on the electrode strips and reducing the width of the electrode strips.
The use of silver paste is reduced, the welding quality is guaranteed, and the use cost is reduced.
Smart Images
Figure CN222814782U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic cells, in particular to a back electrode of a solar cell and a solar cell. Background Art
[0002] As an emerging clean and renewable energy, solar cells have attracted much attention due to their ability to directly convert solar energy into electrical energy, long life, simple maintenance, and unattended operation. Solar power systems have been increasingly widely used.
[0003] In the field of crystalline silicon solar cell manufacturing technology, silver paste is mainly used in grid lines and back electrode structures. In order to ensure the welding quality of the back electrode in existing solar cells, it is usually set in a rectangular strip shape (such as Figure 1 As shown in the figure, the design width is large, and excessive amount of silver paste is used, which is easy to cause waste. Utility Model Content
[0004] The utility model aims to provide a back electrode of a solar cell and a solar cell, so as to solve the problems existing in the above-mentioned prior art and reduce the waste and cost of silver paste.
[0005] To achieve the above purpose, the utility model provides the following solutions:
[0006] The utility model provides a back electrode of a solar cell, comprising a body, wherein the body comprises a plurality of electrode strips for being arranged side by side on one side of the cell body, and at least one side of the electrode strips is provided with a plurality of protrusions for being arranged on one side of the cell body at intervals along the length direction.
[0007] Preferably, a plurality of the protrusions for being arranged on one side of the battery cell body are spaced apart and distributed along the length direction on both opposite sides of the electrode strip.
[0008] Preferably, the thickness dimension of each of the protrusions perpendicular to the battery cell body is the same as the thickness dimension of the electrode strips perpendicular to the battery cell body.
[0009] Preferably, the plurality of protrusions on one side of the electrode strip are arranged at equal intervals.
[0010] Preferably, the plurality of protrusions on both sides of the electrode strip are symmetrically arranged along the axis of the length direction of the electrode strip.
[0011] Preferably, the width of the electrode strip is 1.2 mm, the length and width of each of the bumps are 0.8 mm, and the distance between two adjacent bumps on one side of the electrode strip is 6 mm.
[0012] The utility model also provides a solar cell, comprising a cell body and the back electrode of the solar cell as described above, wherein a plurality of parallel electrode strips are arranged on one side of the cell body, and at least one side of the electrode strips is spaced apart along the length direction with a plurality of protrusions for being arranged on one side of the cell body.
[0013] Compared with the prior art, the utility model has achieved the following technical effects:
[0014] The back electrode of the solar cell provided by the utility model can reduce the width of each electrode strip compared to the traditional rectangular strip, so that the width of the electrode strip is smaller than the width of the traditional rectangular strip back electrode, which can reduce the use of silver paste, and by arranging a plurality of spaced protrusions on one side, it is ensured that the welding quality meets the use requirements, and even if a plurality of spaced protrusions are arranged, the use of silver paste is still reduced compared to the traditional wider rectangular strip back electrode, so that the back electrode of the solar cell provided by the utility model can reduce the waste of silver paste and the use cost.
[0015] The utility model also provides a solar cell, in which a plurality of electrode strips are arranged on one side of the cell body. Compared with the traditional rectangular strips, each electrode strip can be arranged with a reduced width, so that the width of the electrode strip is smaller than the width of the back electrode of the traditional rectangular strip, thereby reducing the use of silver paste, and by arranging a plurality of spaced protrusions on one side, it is ensured that the welding quality meets the use requirements, thereby reducing the waste of silver paste and the use cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 It is a schematic diagram of the structure of a traditional solar cell;
[0018] Figure 2 This is a schematic diagram of the structure of a solar cell provided in Example 2.
[0019] In the figure: 1-battery body; 2-electrode strip; 3-bump. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] The utility model aims to provide a back electrode of a solar cell and a solar cell, so as to solve the problems existing in the above-mentioned prior art and reduce the waste and cost of silver paste.
[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0023] Embodiment 1
[0024] The utility model provides a back electrode of a solar cell, see Figure 2 , including a main body, the main body includes a plurality of electrode strips 2 for being arranged side by side on one side of a battery cell body 1, and a plurality of protrusions 3 for being arranged on one side of a battery cell body 1 are distributed at intervals along the length direction on at least one side of the electrode strips 2.
[0025] Compared with the traditional rectangular strip back electrode, each electrode strip 2 can be widened so that the width of the electrode strip 2 is smaller than the width of the traditional rectangular strip back electrode, which can reduce the use of silver paste. By setting a plurality of spaced-apart bumps 3 on one side, the welding quality is guaranteed to meet the use requirements. Even if a plurality of spaced-apart bumps 3 are set, the use of silver paste is still reduced compared with the traditional wider rectangular strip back electrode. Therefore, the back electrode of the solar cell provided in this embodiment can reduce the waste of silver paste and the use cost.
[0026] Among them, the number of electrode strips 2 can be 3; the specific number is determined according to actual needs.
[0027] In the optional scheme of this embodiment, it is more preferred that a plurality of protrusions 3 for being arranged on one side of the battery cell body 1 are spaced apart along the length direction on both sides of the electrode strip 2. By arranging a plurality of protrusions 3 on both sides of the electrode strip 2, it is further ensured that the welding quality meets the use requirements.
[0028] In the optional scheme of this embodiment, it is more preferred that the thickness dimension of each bump 3 perpendicular to the battery cell body 1 is the same as the thickness dimension of the electrode strip 2 perpendicular to the battery cell body 1 to ensure the regularity of the electrode strip 2 and the bump 3.
[0029] In the optional scheme of this embodiment, it is more preferred that the multiple protrusions 3 on one side of the electrode strip 2 are arranged at equal intervals to ensure regularity.
[0030] In the optional scheme of this embodiment, it is more preferred that the multiple protrusions 3 on both sides of the electrode strip 2 are symmetrically arranged along the axis of the length direction of the electrode strip 2 to ensure regularity.
[0031] In the optional scheme of this embodiment, it is more preferred that the width of the electrode strip 2 is 1.2 mm, the length and width of each bump 3 are 0.8 mm, and the spacing between two adjacent bumps 3 on one side of the electrode strip 2 is 6 mm; specifically, the conventional rectangular strip back electrode is usually about 2.2 mm wide, and the length and thickness of the electrode strip 2 provided in this embodiment can be consistent with the conventional rectangular strip back electrode, such as the length is 156.75 mm, and 26 bumps 3 can be set on one side of the electrode strip 2, then the projection area of a conventional rectangular strip back electrode in the direction perpendicular to the battery cell is 2.2*156.75=344.75 mm 2 , and the projection area of the electrode strip 2 and the bumps 3 on both sides thereof provided in this embodiment in the direction perpendicular to the battery cell is 1.2*156.75+0.8*0.8*52=221.38mm 2 It can be seen that under the premise of the same thickness, the amount of silver paste required for the back electrode provided by this embodiment is smaller than that of the traditional rectangular strip, which can reduce the amount of silver paste used.
[0032] Embodiment 2
[0033] This embodiment provides a solar cell. Figure 2 , including a cell body 1 and the back electrode of the solar cell provided in Example 1, a plurality of parallel electrode strips 2 are arranged on one side of the cell body 1, and a plurality of bumps 3 for being arranged on one side of the cell body 1 are spaced apart along the length direction on at least one side of the electrode strip 2; compared with the traditional rectangular strip, each electrode strip 2 can be widened so that the width of the electrode strip 2 is smaller than the width of the traditional rectangular strip back electrode, thereby reducing the amount of silver paste used, and by arranging a plurality of spaced apart bumps 3 on one side, it is ensured that the welding quality meets the use requirements, thereby reducing the waste of silver paste and the use cost.
[0034] The utility model uses specific examples to illustrate the principle and implementation of the utility model. The above examples are only used to help understand the method and core idea of the utility model. At the same time, for those skilled in the art, according to the idea of the utility model, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the utility model.
Claims
1. A back electrode of a solar cell, characterized in that: The invention comprises a main body, wherein the main body comprises a plurality of electrode strips (2) for being arranged side by side on a side of a battery cell body (1), and at least one side of the electrode strips (2) is provided with a plurality of protrusions (3) for being arranged on a side of the battery cell body (1) at intervals along the length direction; the thickness dimension of each protrusion (3) perpendicular to the battery cell body (1) is the same as the thickness dimension of the electrode strips (2) perpendicular to the battery cell body (1).
2. The back electrode of the solar cell according to claim 1, characterized in that: A plurality of protrusions (3) for being arranged on one side of the battery cell body (1) are spaced apart and distributed along the length direction on opposite sides of the electrode strip (2).
3. The back electrode of the solar cell according to claim 2, characterized in that: The plurality of protrusions (3) on one side of the electrode strip (2) are arranged at equal intervals.
4. The back electrode of the solar cell according to claim 3, characterized in that: The plurality of protrusions (3) on both sides of the electrode strip (2) are symmetrically arranged along the axis of the length direction of the electrode strip (2).
5. The back electrode of the solar cell according to claim 4, characterized in that: The width of the electrode strip (2) is 1.2 mm, the length and width of each of the protrusions (3) are both 0.8 mm, and the spacing between two adjacent protrusions (3) on one side of the electrode strip (2) is 6 mm.
6. A solar cell, characterized in that: The invention comprises a cell body (1) and a back electrode of a solar cell as claimed in any one of claims 1 to 5, wherein a plurality of electrode strips (2) arranged side by side are arranged on one side of the cell body (1), and a plurality of protrusions (3) for being arranged on one side of the cell body (1) are spaced apart along the length direction on at least one side of the electrode strip (2).