CN218677162U - Solar cell string and photovoltaic module - Google Patents
Solar cell string and photovoltaic module Download PDFInfo
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- CN218677162U CN218677162U CN202223020594.1U CN202223020594U CN218677162U CN 218677162 U CN218677162 U CN 218677162U CN 202223020594 U CN202223020594 U CN 202223020594U CN 218677162 U CN218677162 U CN 218677162U
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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
Abstract
The application relates to the field of photovoltaics, and discloses a solar cell string and a photovoltaic module, which comprise at least two IBC cells and a conductive interconnection bar; the back of the IBC battery is provided with a positive electrode, a negative electrode and equipotential grid lines, wherein the equipotential grid lines comprise a positive equipotential line and/or a negative equipotential line, the positive equipotential line is connected with the positive electrode, and the negative equipotential line is connected with the negative electrode; the positive grid lines and the negative grid lines of the adjacent IBC batteries are connected through the conductive interconnection strips, and the conductive interconnection strips cover the back faces of the IBC batteries. The battery comprises the positive electrode equipotential lines and/or the negative electrode equipotential lines, so that the potentials of each positive electrode and each negative electrode are equal, the uniformity of reverse bias current is promoted when the battery is reversely biased, uniform breakdown is formed, and the power consumption and the temperature of hot spots are reduced. The back of battery is covered to the electrically conductive interconnection strip, and the electric current of collecting increases, and need not to set up the pad of the metal or large tracts of land of converging of broad, reduces and shelters from for efficiency promotes, simultaneously reduce cost.
Description
Technical Field
The application relates to the photovoltaic field, in particular to a solar cell string and a photovoltaic module.
Background
An IBC (interdigitated back contact) solar cell is a back junction back contact solar cell, and positive and negative metal electrodes thereof are arranged on a backlight surface of the cell in an interdigital manner. The IBC solar cell has excellent hot spot resistance and is favored by photovoltaic industry and users.
At present, when connecting the IBC solar cells into a cell string, the ends of adjacent cells may be connected, specifically, all the positive electrodes and the negative electrodes on the back of the cells are connected at the edges of the cells by using a bus metal, and then the positive bus metal and the negative bus metal of the adjacent cells are connected together. This connection has the following disadvantages: because the end that converges at solar cell edge is connected, in order to guarantee the reliability of connecting between the battery, need use the metal that converges of broad or need set up the pad of large tracts of land at the battery piece edge, make solar cell materials increase on the one hand, the cost of manufacture is high, on the other hand, there is more sheltering from to the battery back, it is especially obvious to many burst subassembly sheltering from the area increase, have great influence to photovoltaic module's back generating capacity, lead to the inefficiency of battery, and edge connection also makes the current collection effect than poor between the adjacent solar cell, lead to photovoltaic module's inefficiency.
Therefore, how to solve the above technical problems should be a great concern to those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a solar cell string and a photovoltaic module so as to improve the efficiency of the photovoltaic module and reduce the manufacturing cost.
In order to solve the above technical problem, the present application provides a solar cell string, including:
at least two IBC cells, conductive interconnect strips;
the back of the IBC battery is provided with a positive electrode, a negative electrode and equipotential grid lines, wherein the equipotential grid lines comprise a positive equipotential line and/or a negative equipotential line, the positive equipotential line is connected with the positive electrode, and the negative equipotential line is connected with the negative electrode;
and the positive grid lines and the negative grid lines of the adjacent IBC batteries are connected through the conductive interconnection strips, and the conductive interconnection strips cover the back surfaces of the IBC batteries.
Optionally, in the solar cell string, the positive equipotential line is connected to an end of the positive electrode, and the negative equipotential line is connected to an end of the negative electrode.
Optionally, in the solar cell string, the positive equipotential line is connected to a non-end of the positive electrode and is insulated from the negative electrode; the negative equipotential lines are connected to the non-end of the negative electrode and are insulated from the positive electrode.
Optionally, in the solar cell string, when no bonding pad is disposed at an intersection of the negative electrode and the positive electrode equipotential line, the insulating layer is disposed between the positive electrode equipotential line and the upper surface of the negative electrode.
Optionally, in the solar cell string, when a pad is disposed at an intersection of the potential line of the negative electrode and the potential line of the positive electrode, the insulating layer is wrapped around the negative electrode and the pad, and an upper surface of the pad is exposed out of the insulating layer.
Optionally, in the solar cell string, when the conductive interconnection bar is a solder strip, the positive electrode and the negative electrode are respectively provided with at least one solder pad, and the solder pads are connected to the solder strip.
Optionally, in the solar cell string, the number of the pads on the positive electrode and the negative electrode is multiple, and the distances between adjacent pads are equal or different.
Optionally, in the solar cell string, the bonding pad is disposed on the entire positive electrode and the entire negative electrode.
Optionally, in the solar cell string, an included angle between the positive electrode fine grid and the positive electrode is less than or equal to 90 °, an included angle between the negative electrode fine grid and the negative electrode is less than or equal to 90 °, and the positive electrode fine grid does not intersect with the adjacent negative electrode fine grid.
Optionally, in the solar cell string, when the conductive interconnection bar is a solder strip, a pad is arranged at a joint of the positive electrode equipotential line and the positive electrode, and a pad is arranged at a joint of the negative electrode equipotential line and the negative electrode.
The application also provides a photovoltaic module, the photovoltaic module comprises any one of the solar cell strings.
The application provides a solar cell string, which comprises at least two IBC cells and a conductive interconnection bar; the back of the IBC battery is provided with a positive electrode, a negative electrode and equipotential grid lines, wherein the equipotential grid lines comprise a positive equipotential line and/or a negative equipotential line, the positive equipotential line is connected with the positive electrode, and the negative equipotential line is connected with the negative electrode; and the positive grid lines and the negative grid lines of the adjacent IBC batteries are connected through the conductive interconnection strips, and the conductive interconnection strips cover the back surfaces of the IBC batteries.
Therefore, the IBC cell in the solar cell string comprises a positive electrode, a negative electrode and at least one of a positive electrode equipotential line and a negative electrode equipotential line, wherein the positive electrode equipotential line is connected with the positive electrode, and the negative electrode equipotential line is connected with the negative electrode, so that the potentials of the positive electrodes are equal, and the potentials of the negative electrodes are equal, so that when current flows from the negative electrode grid lines to the positive electrode grid lines, the current flowing from the negative electrodes to the corresponding positive electrodes is equal, the current uniformity between the positive electrodes and the negative electrodes is improved, the uniformity of reverse bias current is promoted when the IBC cell is in reverse bias, uniform breakdown is formed, and the power consumption and the temperature of hot spots are reduced. And, the positive pole grid line and the negative pole grid line of adjacent IBC battery utilize electrically conductive interconnection bar to connect in this application, and electrically conductive interconnection bar covers the back of IBC battery for the electric current that electrically conductive interconnection bar was collected is many, need not to set up the pad of the confluence metal of broad or large tracts of land simultaneously, reduces the sheltering from to the IBC battery back, makes the efficiency of battery promote, and reduces the quantity of IBC battery preparation material, reduce cost.
In addition, this application still provides a photovoltaic module who has above-mentioned advantage.
Drawings
For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a solar cell string according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a backside of an IBC cell according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of another solar cell string provided in the embodiment of the present application;
FIG. 4 is a schematic diagram of the isolation between the potential lines of the positive electrode and the negative electrode according to the embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another example of the isolation of the positive equipotential lines from the negative electrodes provided in the present application;
fig. 6 is a schematic view illustrating connection between a bus bar and a solder strip according to an embodiment of the present disclosure.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As described in the background section, when the IBC solar cells are connected into a cell string, all the positive electrodes and the negative electrodes on the back of the cell pieces are connected at the edges of the cell pieces by the bus metal, and then the positive bus metal and the negative bus metal of the adjacent cell pieces are connected together, which has the defects of high manufacturing cost and low efficiency.
In view of the above, the present application provides a solar cell string, please refer to fig. 1 to 6, which includes:
at least two IBC cells 1, conductive interconnect strips 9;
the back of the IBC battery 1 is provided with a positive electrode 2, a negative electrode 3 and equipotential grid lines, wherein the equipotential grid lines comprise a positive equipotential line 7 and/or a negative equipotential line 6, the positive equipotential line 7 is connected with the positive electrode 2, and the negative equipotential line 6 is connected with the negative electrode 3;
the positive electrode grid lines and the negative electrode grid lines of the adjacent IBC batteries 1 are connected through the conductive interconnection bars 9, and the conductive interconnection bars 9 cover the back surfaces of the IBC batteries 1.
The positive electrode 2 is also a positive electrode bus bar, and the negative electrode 3 is also a negative electrode bus bar.
The positive grid line comprises a positive electrode 2 and a positive fine grid 4, and the negative grid line comprises a negative electrode 3 and a negative fine grid 5. The positive electrodes 2 and the negative electrodes 3 on the back of the IBC cells 1 are alternately distributed, and the positive electrodes 2 and the negative electrodes 3 of the adjacent IBC cells 1 are aligned. The conductive interconnection bars 9 connect the positive electrodes 2 and the negative electrodes 3 of the adjacent IBC cells 1, or connect the positive electrode fine grids 4 and the negative electrode fine grids 5 of the adjacent IBC cells 1.
The conductive interconnection strips 9 include, but are not limited to, solder strips, conductive adhesive strips. When the conductive interconnection bar 9 is a solder strip, the conductive interconnection bar further comprises a solder pad 8 for connecting the solder strip and the IBC cell 1, wherein the solder pad 8 refers to a metal electrode material with a certain welding area, and the shape of the solder pad 8 is not limited in the application and can be set by itself.
The setting condition of medium potential grid line includes three kinds in this application, and the first kind is: only the positive potential contour 7 is provided, the second being: only the negative potential contour 6 is provided, and the third is: and a positive electrode equipotential line 7 and a negative electrode equipotential line 6 are arranged at the same time.
Each positive electrode 2 or negative electrode 3 is a common connection point at the connection position of the IBC battery 1 and the corresponding equipotential grid line, so as to ensure that all the positive electrodes 2 or negative electrodes 3 have equipotential connection, and a single positive electrode 2 or negative electrode 3 is desoldered, so that the IBC battery 1 can still maintain the shunting capacity during global reverse bias, wherein the number of the common connection points is at least one.
In the present application, the connection position of the positive equipotential line 7 to the positive electrode 2 and the connection position of the negative equipotential line 6 to the negative electrode 3 are not limited. For example, as shown in fig. 1 and 2, the positive equipotential line 7 is connected to an end of the positive electrode 2, and the negative equipotential line 6 is connected to an end of the negative electrode 3. As another possible embodiment, as shown in fig. 3, the positive potential equipotential line 7 is connected to a non-end portion of the positive electrode 2 and is insulated from the negative electrode 3; the negative potential equipotential line 6 is connected to a non-end of the negative electrode 3 and is insulated from the positive electrode 2. When the positive electrode equipotential lines 7 are connected to the end portions of the positive electrodes 2 and the negative electrode equipotential lines 6 are connected to the end portions of the negative electrodes 3, short circuits caused by welding offsets during interconnection can be effectively reduced.
The positive equipotential lines 7 are connected with the positive electrodes 2, the negative equipotential lines 6 are connected with the negative electrodes 3, so that the potentials of all the positive electrodes 2 are equal, the potentials of all the negative electrodes 3 are equal, the current flowing from the negative electrodes 3 to the positive electrodes 2 is equal, and the uniformity is improved. If there is no equipotential line, the potentials of the positive electrodes 2 are different, and the potentials of the negative electrodes 3 are different, the potential differences between the different positive electrodes 2 and the aligned negative electrodes 3 are different, so that the currents flowing from the negative electrodes 3 to the corresponding positive electrodes 2 have different magnitudes, and the uniformity is poor.
When the positive equipotential lines 7 are connected to the non-end portions of the positive electrodes 2, there is a region where the positive equipotential lines 7 intersect the negative electrodes 3, and the positive equipotential lines 7 and the negative electrodes 3 need to be insulated in this region. Two types of insulation are described below.
First, referring to fig. 4, when no bonding pad 8 is disposed at the intersection of the negative electrode 3 and the positive equipotential line 7, an insulating layer 10 is disposed between the positive equipotential line 7 and the upper surface of the negative electrode 3. Secondly, referring to fig. 5, when a bonding pad 8 is disposed at the intersection of the negative electrode 3 and the positive electrode equipotential line 7, the insulating layer 10 covers the negative electrode 3 and the bonding pad 8, and the upper surface of the bonding pad 8 is exposed out of the insulating layer 10. The purpose of the exposed pads 8 is to ensure an electrically conductive connection with the solder strip. Wherein, the insulating layer 10 includes but is not limited to a silicon nitride film layer, a silicon dioxide film layer; the insulating layer can be coated only on the area needing isolation by means of a mask.
Similarly, when the negative potential contour 6 is connected to the non-end portion of the negative electrode 3, there is a region where the negative potential contour 6 intersects the positive electrode 2, and the negative potential contour 6 needs to be insulated from the positive electrode 2 in this region. The insulation setting is the same as that shown in fig. 4 and 5, and the description thereof is omitted.
The width of the equipotential grid line is between 10 and 100 μm, for example, 10 μm, 20 μm, 50 μm, 80 μm, 90 μm, 100 μm, etc., while the width of the bus metal in the prior art is generally more than 2mm, the material of the equipotential line in the present application is few, and the manufacturing cost can be reduced.
The distance between the positive electrode 2 and the negative electrode 3 can be 3 mm-500 mm, and the number of the positive electrode 2 and the negative electrode 3 can be 1-499 as the case may be. The total number of the positive electrodes 2 and the negative electrodes 3 on the back surface of the IBC cell 1 may be an odd number or an even number. The number of the positive electrodes 2 and the negative electrodes 3 on the back of the IBC cell 1 may be equal or different, and is not limited in the present application.
The material of the positive electrode 2 and the negative electrode 3 contains at least one simple substance, compound or mixture of conductive materials, such as metals, conductive oxides, conductive organics, and the like.
The positive electrode 2 is connected with the positive electrode fine grid 4, the negative electrode fine grid 5 is connected with the negative electrode 3, and the adjacent positive electrode fine grid 4 and the negative electrode fine grid 5 are not connected. Wherein, the distance between the positive electrode fine grid 4 and the negative electrode fine grid 5 can be between 0.001mm and 10 mm. The material of the positive electrode fine grid 4 and the negative electrode fine grid 5 comprises at least one simple substance, compound or mixture of conductive materials, such as metal, conductive oxide, conductive organic matter and the like.
In the present application, the positional relationship between the positive electrode 2 and the positive fine grid 4, and the positional relationship between the negative electrode 3 and the negative fine grid 5 are not limited. Optionally, an included angle between the positive electrode fine grid 4 and the positive electrode 2 is less than or equal to 90 °, an included angle between the negative electrode fine grid 5 and the negative electrode 3 is less than or equal to 90 °, and the positive electrode fine grid 4 does not intersect with the adjacent negative electrode fine grid 5.
The shapes of the positive electrode fine grid 4 and the negative electrode fine grid 5 can be regular long strips, triangles and the like, and can also be irregular shapes, and the shapes are all within the protection scope of the application.
It should be noted that adjacent positive electrode fine grids 4 and negative electrode fine grids 5 cannot be contacted, and conduction is avoided. When the anode fine grid 4 and the cathode fine grid 5 are in irregular shapes, at least one line of the central axis or the edge of the anode fine grid 4 and the cathode fine grid 5 is parallel to the edge or the central axis of the adjacent cathode fine grid 5 and the anode fine grid 4, and thus non-contact can be realized.
The conductive interconnection bars 9 cover the back of the IBC cells 1, i.e. the projections of both ends of the conductive interconnection bars 9 are located on two adjacent IBC cells 1, respectively. In order to maximize the current collected by the conductive interconnection bar 9, one end of the conductive interconnection bar 9 is connected to the end of the positive electrode 2 remote from the aligned negative electrode 3, and the other end of the conductive interconnection bar 9 is connected to the end of the negative electrode 3 remote from the aligned positive electrode 2, as shown in fig. 1, i.e. the length of the conductive interconnection bar 9 is equal to the distance between the two end points of the aligned positive electrode 2 and negative electrode 3 remote from each other. However, the present application is not limited to this, and the length of the conductive interconnection bar 9 may be slightly smaller than the distance between two ends of the aligned positive electrode 2 and negative electrode 3 away from each other.
After the connection of the IBC battery 1 string is completed, the bus bars 11 are used to interconnect the same kind of solder strips (positive electrode solder strip and negative electrode solder strip) at the head and the tail of the battery string, as shown in fig. 6.
The IBC cell 1 in the solar cell string comprises a positive electrode 2, a negative electrode 3 and at least one of a positive equipotential line 7 and a negative equipotential line 6, wherein the positive equipotential line 7 is connected with the positive electrode 2, and the negative equipotential line 6 is connected with the negative electrode 3, so that the potentials of the positive electrodes 2 are equal, and the potentials of the negative electrodes 3 are equal, so that when current flows to the positive grid lines from the negative grid lines, the current flowing through the corresponding positive electrodes 2 from the negative electrodes 3 is equal, the uniformity of the current between the positive electrodes 2 and the negative electrodes 3 is improved, and the uniformity of the reverse bias current is improved when the IBC cell 1 is reversely biased, so that uniform breakdown is formed, and the power consumption and the temperature of hot spots are reduced. In addition, in the application, the positive electrode 2 and the negative electrode 3 of the adjacent IBC battery 1 are connected by the conductive interconnection bar 9, and the conductive interconnection bar 9 covers the back of the IBC battery 1, so that the current collected by the conductive interconnection bar 9 is large, meanwhile, a wider confluence metal or a large-area bonding pad 8 is not required to be arranged, the shielding on the back of the IBC battery 1 is reduced, the efficiency of the battery is improved, the using amount of manufacturing materials of the IBC battery 1 is reduced, and the cost is reduced.
On the basis of the above embodiment, in an embodiment of the present application, when the conductive interconnection bar 9 is a solder strip, at least one pad 8 is respectively disposed on the positive electrode 2 and the negative electrode 3, and the pad 8 is connected to the solder strip.
The specific number of the pads 8 may be one, two, three, etc., which may be specific and is not limited in this application.
Further, when the number of the pads 8 on the positive electrode 2 and the negative electrode 3 is multiple, the adjacent pads 8 may have equal or unequal intervals, which is within the protection scope of the present application.
When the bonding pads 8 are arranged on the positive electrode 2 and the negative electrode 3, and the number of the bonding pads 8 is one, the bonding pads 8 can be arranged in a certain local area on the positive electrode 2 and the negative electrode 3; alternatively, the pad 8 is disposed on the whole of the positive electrode 2 and the whole of the negative electrode 3, that is, the length of the pad 8 disposed on the positive electrode 2 is equal to the length of the positive electrode 2, and the length of the pad 8 disposed on the negative electrode 3 is equal to the length of the negative electrode 3.
When the positive electrode 2 and the negative electrode 3 are provided with the bonding pad 8, the bonding strip and other areas of the positive electrode 2 and the negative electrode 3 are in a suspended state or an interconnected state.
Preferably, a plurality of bonding pads 8 are arranged on the positive electrode 2 and the negative electrode 3, so that interconnection redundancy is improved, and the connection reliability of the corresponding main grid region is ensured.
On the basis of the above embodiments, in an embodiment of the present application, when the conductive interconnection bar 9 is a solder strip, the solder pad 8 may also be disposed on the positive electrode fine grid 4 and the negative electrode fine grid 5, that is, the solder pad 8 is not disposed on the positive electrode 2 and the negative electrode 3, and the solder strip is indirectly connected with the positive electrode 2 and the negative electrode 3.
On the basis of any one of the above embodiments, in an embodiment of the present application, when the conductive interconnection bar 9 is a solder strip, a bonding pad 8 is disposed at a connection position of the positive electrode equipotential line 7 and the positive electrode 2, and a bonding pad 8 is disposed at a connection position of the negative electrode equipotential line 6 and the negative electrode 3.
That is, the welding pad 8 is arranged at the common connection point of the positive electrode 2 and the positive equipotential line 7 and the common connection point of the negative electrode 3 and the negative equipotential line 6, so that the welding tension of the IBC battery 1 can be increased, the cost is reduced, and the battery efficiency is improved. Of course, the common connection point of the positive electrode 2 and the positive equipotential line 7 and the common connection point of the negative electrode 3 and the negative equipotential line 6 may be the bus intersection point of the same electrodes without providing the bonding pad 8.
The application further provides a photovoltaic module, and the solar cell string in any one of the above embodiments of the photovoltaic module.
The photovoltaic module comprises a frame, a stacked back plate, a back adhesive film layer, a battery string layer, a front adhesive film layer, a front substrate and the like, and reference can be made to related technologies.
The manufacturing process of the photovoltaic module is approximately as follows: performing series-parallel typesetting on a plurality of battery strings to form basic electrical connection to form a battery string layer; and laminating the back plate, the back adhesive film layer, the battery string layer, the front adhesive film layer and the front substrate, and laminating the laminated member by utilizing a packaging machine such as a laminating machine or an autoclave to obtain the photovoltaic assembly.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
The solar cell string and the photovoltaic module provided by the present application are described in detail above. The principle and the implementation of the present application are explained herein by using specific examples, and the above descriptions of the examples are only used to help understand the scheme and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (11)
1. A solar cell string, comprising:
at least two IBC cells, conductive interconnect strips;
the back of the IBC battery is provided with a positive electrode, a negative electrode and equipotential grid lines, wherein the equipotential grid lines comprise a positive equipotential line and/or a negative equipotential line, the positive equipotential line is connected with the positive electrode, and the negative equipotential line is connected with the negative electrode;
and the positive grid lines and the negative grid lines of the adjacent IBC batteries are connected through the conductive interconnection strips, and the conductive interconnection strips cover the back surfaces of the IBC batteries.
2. The solar cell string according to claim 1, wherein the positive equipotential line is connected to an end of the positive electrode, and the negative equipotential line is connected to an end of the negative electrode.
3. The solar cell string according to claim 1, wherein the positive equipotential line is connected to a non-end of the positive electrode and is insulated from the negative electrode; the negative equipotential line is connected to a non-end of the negative electrode and is insulated from the positive electrode.
4. The solar cell string according to claim 3, wherein an insulating layer is provided between the positive electrode equipotential line and the upper surface of the negative electrode when no bonding pad is provided at the intersection of the negative electrode and the positive electrode equipotential line.
5. The solar cell string according to claim 3, wherein when a bonding pad is disposed at an intersection of the equipotential line of the negative electrode and the equipotential line of the positive electrode, an insulating layer covers the negative electrode and the bonding pad, and an upper surface of the bonding pad is exposed from the insulating layer.
6. The solar cell string according to claim 1, wherein when the conductive interconnection bar is a solder strip, at least one pad is disposed on each of the positive electrode and the negative electrode, and the pad is connected to the solder strip, or the pad is disposed on the positive electrode fine grid and the negative electrode fine grid.
7. The solar cell string according to claim 6, wherein the number of the pads on the positive electrode and the negative electrode is plural, and the adjacent pads are spaced at equal or unequal intervals.
8. The string of solar cells of claim 6, wherein the bonding pads are provided throughout the positive electrode and throughout the negative electrode.
9. The solar cell string according to claim 1, wherein an included angle between a positive fine grid and the positive electrode is less than or equal to 90 °, an included angle between a negative fine grid and the negative electrode is less than or equal to 90 °, and the positive fine grid does not intersect with the adjacent negative fine grid.
10. The solar cell string according to any one of claims 1 to 9, wherein when the conductive interconnection bar is a solder ribbon, a pad is provided at a connection of the positive electrode equipotential line and the positive electrode, and a pad is provided at a connection of the negative electrode equipotential line and the negative electrode.
11. A photovoltaic module comprising a string of solar cells according to any one of claims 1 to 10.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117253928A (en) * | 2023-11-13 | 2023-12-19 | 淮安捷泰新能源科技有限公司 | Solar cell piece, component and power consumption determining method based on anti-breaking grid structure |
| CN117727813A (en) * | 2024-02-07 | 2024-03-19 | 晶科能源(海宁)有限公司 | Solar cell and photovoltaic module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117253928A (en) * | 2023-11-13 | 2023-12-19 | 淮安捷泰新能源科技有限公司 | Solar cell piece, component and power consumption determining method based on anti-breaking grid structure |
| CN117253928B (en) * | 2023-11-13 | 2024-03-15 | 淮安捷泰新能源科技有限公司 | Solar cell piece, component and power consumption determining method based on anti-breaking grid structure |
| CN117727813A (en) * | 2024-02-07 | 2024-03-19 | 晶科能源(海宁)有限公司 | Solar cell and photovoltaic module |
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