CN121152399A - Solar cell, battery assembly and photovoltaic system - Google Patents
Solar cell, battery assembly and photovoltaic systemInfo
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- CN121152399A CN121152399A CN202511375505.0A CN202511375505A CN121152399A CN 121152399 A CN121152399 A CN 121152399A CN 202511375505 A CN202511375505 A CN 202511375505A CN 121152399 A CN121152399 A CN 121152399A
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Abstract
The application discloses a solar cell, a cell assembly and a photovoltaic system. The solar cell comprises a first surface of a substrate, a first series connection region and a second series connection region, wherein the first surface of the substrate is further provided with a plurality of first collecting grid lines and a plurality of second collecting grid lines, the first collecting grid lines are discontinuous at the first series connection region and are continuous at the second series connection region, the second collecting grid lines are discontinuous at the second series connection region and are continuous at the first series connection region, the first series connection region and the second series connection region are used for arranging welding strips, the ratio of the size of the substrate along the first direction to the distance between the adjacent first series connection regions is smaller than a first set value, and/or the ratio of the size of the substrate along the first direction to the distance between the adjacent second series connection regions is smaller than a second set value. The application can improve the photoelectric conversion efficiency of the solar cell.
Description
Technical Field
The application relates to the technical field of photovoltaics, in particular to a solar cell, a cell assembly and a photovoltaic system.
Background
Solar cells are widely used in various photovoltaic power generation systems as a high-efficiency and clean energy conversion device. The solar cell comprises a silicon substrate and an electrode arranged on the silicon substrate, wherein the electrode is in ohmic contact with the silicon substrate and is responsible for effectively collecting electrons and holes (carriers) generated by a silicon material under the irradiation of sun light so as to be converted into usable electric energy.
However, the existing solar cell has low photoelectric conversion efficiency.
Disclosure of Invention
The application provides a solar cell, a cell assembly and a photovoltaic system, which are used for improving the photoelectric conversion efficiency of the solar cell.
According to an aspect of the present application, there is provided a solar cell including:
The first surface of the substrate is provided with a plurality of first series connection areas and a plurality of second series connection areas, and the first series connection areas and the second series connection areas are sequentially and alternately arranged along a first direction;
The first surface of the substrate is also provided with a plurality of first collecting grid lines and a plurality of second collecting grid lines, the first collecting grid lines and the second collecting grid lines extend along a first direction, the first collecting grid lines and the second collecting grid lines are alternately arranged along a second direction, and the first direction and the second direction are crossed;
the first serial connection area and the second serial connection area are used for arranging welding strips;
The ratio of the size of the substrate along the first direction to the spacing between the adjacent first serial connection areas is smaller than a first set value, and/or the ratio of the size of the substrate along the first direction to the spacing between the adjacent second serial connection areas is smaller than a second set value, wherein the first set value is smaller than or equal to 18, and the second set value is smaller than or equal to 18.
Optionally, a ratio of a dimension of the substrate along the first direction to a spacing between adjacent first tandem regions is greater than 11 and less than 18;
The ratio of the dimension of the substrate along the first direction to the spacing between adjacent second tandem areas is greater than 11 and less than 18.
Optionally, the total amount of the first tandem zone and the second tandem zone is greater than or equal to 26.
Optionally, the total amount of the first tandem zone and the second tandem zone is 26, 28, 30, or 32.
Optionally, the number of the first tandem connection regions and the number of the second tandem connection regions are equal.
Optionally, the spacing between at least some adjacent first tandem zones is unequal along the first direction, and/or the spacing between at least some adjacent second tandem zones is unequal along the first direction.
Optionally, the first surface includes a first edge region and a second edge region disposed opposite along a first direction, and a central region disposed between the first edge region and the second edge region;
The distance between the adjacent first tandem connection areas in the first edge area and the second edge area is larger than the distance between the adjacent first tandem connection areas in the central area;
and the distance between the adjacent second tandem connection areas in the first edge area and the second edge area is larger than the distance between the adjacent second tandem connection areas in the central area.
Optionally, in the first direction, in the central area, the distance between adjacent first tandem areas is gradually reduced and then gradually increased, or the distance between adjacent first tandem areas is the same;
in the first direction, in the central region, the distance between the adjacent second tandem regions is gradually reduced and then gradually increased, or the distance between the adjacent second tandem regions is the same.
Optionally, a distance between adjacent first tandem zones in the first edge zone is equal to a distance between adjacent first tandem zones in the second edge zone;
the distance between the adjacent second tandem connection areas in the first edge area is equal to the distance between the adjacent second tandem connection areas in the second edge area.
Optionally, the first surface includes a first edge and a second edge disposed opposite along a first direction;
Along the direction that the first edge points to the second edge, the distance between the adjacent first serial connection areas is gradually reduced and then gradually increased, and/or the distance between the adjacent second serial connection areas is gradually reduced and then gradually increased.
Optionally, the first tandem area includes a plurality of first bonding pads, and the first bonding pads are electrically connected with the second collecting grid lines in the first tandem area in a one-to-one correspondence manner;
the second series area comprises a plurality of second bonding pads, and the second bonding pads are electrically connected with the first collecting grid lines in the second series area in a one-to-one correspondence manner;
the first bonding pad and the second bonding pad are used for being electrically connected with the bonding pad.
Optionally, the line width of the part of the second collection grid line in the first serial connection region is larger than the line width of the part of the second collection grid line in the first serial connection region, the line width of the part of the first collection grid line in the second serial connection region is larger than the line width of the part of the second collection grid line in the other region, and the second bonding pad is the first collection grid line in the second serial connection region;
Or the first bonding pad is a conductive layer arranged on one side of the second collecting grid line far away from the substrate or one side of the second collecting grid line close to the substrate, and the second bonding pad is a conductive layer positioned on one side of the first collecting grid line far away from the substrate or one side of the second collecting grid line close to the substrate.
According to another aspect of the application, there is provided a cell assembly comprising a solar cell according to any of the embodiments of the application.
According to another aspect of the application, there is provided a photovoltaic system comprising a cell assembly according to any of the embodiments of the application.
According to the embodiment of the application, the ratio of the size of the substrate along the first direction to the spacing between the adjacent first series connection areas is smaller than the first set value, the first set value is smaller than or equal to 18, the number of the first series connection areas on the whole substrate is ensured to be larger, the density of the first series connection areas is larger, the collection efficiency of the first series connection areas on carriers can be improved, the ratio of the size of the substrate along the first direction to the spacing between the adjacent second series connection areas is smaller than or equal to the second set value, the second set value is smaller than or equal to 18, the number of the second series connection areas on the whole substrate is ensured to be larger, and the collection efficiency of the second series connection areas on carriers can be improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a solar cell according to an embodiment of the present application;
fig. 2 is a schematic view of a solar cell according to an embodiment of the present application;
fig. 3 is a schematic view of another solar cell according to an embodiment of the present application.
Reference numerals 10-substrate, 101-first edge region, 102-second edge region, 103-central region, 61-first tandem region, 62-second tandem region, 41-first collection gate line, 42-second collection gate line, 51-first pad, 52-second pad, 11-first edge, 12-second edge, 21-first bus gate line, 22-second bus gate line, 31-first edge bus gate line, 32-second edge bus gate line.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
An embodiment of the present application provides a solar cell, and fig. 1 is a schematic diagram of the solar cell provided by the embodiment of the present application, and referring to fig. 1, the solar cell includes:
The first surface of the substrate 10 is provided with a plurality of first serial connection areas 61 and a plurality of second serial connection areas 62, and the first serial connection areas 61 and the second serial connection areas 62 are sequentially and alternately arranged along a first direction X;
The first surface of the substrate 10 is also provided with a plurality of first collecting grid lines 41 and a plurality of second collecting grid lines 42, wherein the first collecting grid lines 41 and the second collecting grid lines 42 extend along a first direction X, the first collecting grid lines 41 and the second collecting grid lines 42 are alternately arranged along a second direction Y, and the first direction X and the second direction Y are crossed;
the first serial connection area 61 and the second serial connection area 62 are used for arranging welding strips;
The ratio of the dimension of the substrate 10 along the first direction X to the spacing L1 between adjacent first tandem areas 61 is smaller than a first set value and/or the ratio of the dimension of the substrate 10 along the first direction X to the spacing L2 between adjacent second tandem areas 62 is smaller than a second set value, wherein the first set value is smaller than or equal to 18 and the second set value is smaller than or equal to 18. Among them, the substrate 10 is a base of the solar cell, and the substrate 10 may include a silicon substrate and functional layers laminated on the silicon substrate, that is, the substrate 10 is the other portion of the solar cell except for the metallization electrode pattern. The functional layer comprises a first doping layer and a second doping layer, and the functional layer can also comprise a film layer such as a tunneling layer. The first doped layer may be an n-type doped layer and the second doped layer may be a p-type doped layer. The silicon substrate can be an n-type silicon substrate or a p-type silicon substrate, the silicon substrate and the p-type doping layer or the n-type doping layer form a p-n junction to generate a photovoltaic effect, when the solar cell is irradiated with light, photons can excite electrons to transition from a valence band to a conduction band to form electron-hole pairs, and the carriers are separated at the p-n junction due to the action of an electric field to generate current. The substrate 10 has a light-facing surface and a backlight surface opposite to each other, the light-facing surface of the substrate 10 is the light-receiving surface of the substrate 10, and the first surface of the substrate 10 may be the backlight surface of the substrate 10.
The substrate 10 is provided with a first collecting gate line 41 and a second collecting gate line 42, and the first collecting gate line 41 and the second collecting gate line 42 are used for collecting carriers generated by the substrate 10. The first collecting gate line 41 is disposed at one side of the first doped layer, the first collecting gate line 41 is electrically contacted with the first doped layer, and the first collecting gate line 41 is used for collecting carriers of the first doped layer. The second collecting gate line 42 is disposed at one side of the second doped layer, the second collecting gate line 42 is electrically contacted with the second doped layer, and the second collecting gate line 42 is used for collecting carriers of the second doped layer. The first tandem region 61 is provided with a first connection structure connected to the solder strip, and the first connection structure is electrically connected to the second collection gate line 42. The second tandem region 62 is provided with a second connection structure connected to the solder strip, and the second connection structure is electrically connected to the first collection gate line 41. For example, the first connection structure and the second connection structure may be pads, and the solder tape is electrically connected to the second collection gate line 42 through the first connection structure to collect carriers of the second collection gate line 42. The solder strip is electrically connected to the first collecting gate line 41 through the second connection structure, and collects carriers of the first collecting gate line 41.
The first setting value and the second setting value may be equal or different. The first setting value and the second setting value may be set as needed. The first setting values may be 17, 16, 15, 14, 13, 12, etc. and the second setting values may be 17, 16, 15, 14, 13, 12, etc. as examples. The spacing L2 between the first tandem regions 61 affects the number and density of the first tandem regions 61 on the substrate 10, affects the collection efficiency of carriers by the first tandem regions 61, and the spacing L2 between the second tandem regions 62 affects the number and density of the second tandem regions 62 on the substrate 10, affecting the collection efficiency of carriers in the second tandem regions 62.
According to the embodiment of the application, the ratio of the size of the substrate 10 along the first direction X to the distance L1 between the adjacent first serial connection regions 61 is smaller than a first set value, the first set value is smaller than or equal to 18, the number of the first serial connection regions 61 on the whole substrate 10 is ensured to be larger, the density of the first serial connection regions 61 is larger, the collection efficiency of the first serial connection regions 61 on carriers can be improved, the ratio of the size of the substrate 10 along the first direction X to the distance L2 between the adjacent second serial connection regions 62 is smaller than a second set value, the second set value is smaller than or equal to 18, the number of the second serial connection regions 62 on the whole substrate 10 is ensured to be larger, and the density of the second serial connection regions 62 is larger, so that the collection efficiency of the second serial connection regions 62 on carriers can be improved.
It should be noted that fig. 1 illustrates only a few first tandem zones 61 and second tandem zones 62, and is not a limitation of the present application.
Based on the above embodiment, optionally, the ratio of the dimension of the substrate 10 along the first direction X to the spacing L1 between adjacent first tandem areas 61 is greater than 11 and less than 18;
the ratio of the dimension of the substrate 10 along the first direction X to the spacing L2 between adjacent second tandem areas 62 is greater than 11 and less than 18.
Specifically, too small a spacing L1 between adjacent first tandem connection regions 61 may result in too many first tandem connection regions 61 on the substrate 10, and too small a spacing L2 between adjacent second tandem connection regions 62 may result in too many second tandem connection regions 62 on the substrate 10, which increases the manufacturing difficulty of the solar cell and causes material waste. In the embodiment, the ratio of the dimension of the substrate 10 along the first direction X to the spacing L1 between the adjacent first serial connection regions 61 is greater than 11 and less than 18, and the ratio of the dimension of the substrate 10 along the first direction X to the spacing L2 between the adjacent second serial connection regions 62 is greater than 11 and less than 18, so that the number of the first serial connection regions 61 and the second serial connection regions 62 on the substrate 10 is more, the density is higher, the solar cell is ensured to have higher photoelectric conversion efficiency, and meanwhile, the manufacturing process difficulty and the material waste are reduced.
Illustratively, the substrate 10 has a dimension in the first direction X that is greater than or equal to 192mm, such as 192mm, or 210mm, etc., the number of first tandem zones 61 is greater than or equal to 13, and the number of second tandem zones 62 is greater than or equal to 13.
Based on the above embodiment, optionally, the total amount of the first tandem area 61 and the second tandem area 62 is greater than or equal to 26.
By the arrangement, the number of the first serial connection areas 61 on the substrate 10 is ensured to be more, the density is higher, the number of the second serial connection areas 62 on the substrate 10 is ensured to be more, the density is higher, carriers can be better collected, the carrier collection efficiency is further improved, and the photoelectric conversion efficiency of the solar cell is improved.
Based on the above embodiments, the total amount of the first tandem area 61 and the second tandem area 62 is optionally 26, 28, 30, or 32.
By the arrangement, the number of the first serial connection areas 61 and the second serial connection areas 62 on the substrate 10 is high, the density is high, the solar cell has high photoelectric conversion efficiency, meanwhile, the manufacturing process difficulty can be reduced, and the material waste is reduced.
Based on the above embodiment, the number of the first tandem zones 61 and the second tandem zones 62 are optionally equal.
By the arrangement, electrons and holes can be efficiently and uniformly collected by the solar cell, and the photoelectric conversion efficiency of the solar cell is improved.
Fig. 2 is a schematic view of a solar cell according to an embodiment of the present application, where, optionally, referring to fig. 2, a spacing L1 between at least partially adjacent first tandem regions 61 is not equal along a first direction X, and/or a spacing L2 between at least partially adjacent second tandem regions 62 is not equal along the first direction X.
Specifically, since the current distributions of the different regions on the substrate 10 are different, the interval between the first serial connection regions 61 and the interval between the second serial connection regions 62 may be set according to the current distributions of the different regions, for example, for a region with higher current, the interval L1 between the first serial connection regions 61 is set to be smaller, the interval L2 between the second serial connection regions 62 is set to be smaller, for a region with lower current, the interval L1 between the first serial connection regions 61 is set to be larger, and the interval L2 between the second serial connection regions 62 is set to be larger.
In this embodiment, the distance L1 between at least part of the adjacent first serial connection regions 61 is unequal along the first direction X, and/or the distance L2 between at least part of the adjacent second serial connection regions 62 is unequal along the first direction X, so that the distribution of the first serial connection regions 61 and the second serial connection regions 62 matches the current distribution, the current collection efficiency is improved, the material waste is reduced, and the manufacturing difficulty of the solar cell is reduced.
On the basis of the above embodiment, optionally, the first surface includes a first edge region 101 and a second edge region 102 disposed opposite to each other in the first direction X, and a central region 103 disposed between the first edge region 101 and the second edge region 102;
in the first edge region 101 and the second edge region 102, a distance L1 between adjacent first tandem regions 61 is larger than a distance L1 between adjacent first tandem regions 61 in the central region 103;
in the first edge region 101 and the second edge region 102, the distance L2 between adjacent second tandem regions 62 is larger than the distance L2 between adjacent second tandem regions 62 in the central region 103.
Specifically, since the edge of the substrate 10 has weaker intensity of light received than the center and there is a passivation difference between the edge region and the center region, edge defects are more than the center, resulting in relatively fewer edge carriers, and thus the current in the edge region of the substrate 10 is less than that in the center region 103. By providing that the spacing L1 between the first series connection regions 61 in the central region 103 is smaller, the spacing L2 between the second series connection regions 62 in the central region 103 is smaller, so that the first series connection regions 61 and the second series connection regions 62 can collect more current in the central region 103. By setting the distance L1 between the first serial connection regions 61 in the first edge region 101 and the second edge region 102 to be larger, the distance L2 between the second serial connection regions 62 to be larger, the number of serial connection regions in the first edge region 101 and the second edge region 102 can be reduced, the material waste is reduced, and the process difficulty is reduced on the premise of ensuring that the currents in the first edge region 101 and the second edge region 102 can be better collected.
Fig. 3 is a schematic view of a further solar cell according to an embodiment of the present application, and optionally, referring to fig. 2 and 3, in the first direction X, in the central region 103, the spacing L1 between adjacent first tandem regions 61 is gradually reduced and then gradually increased (fig. 3), or the spacing L1 between adjacent first tandem regions 61 is the same (fig. 2);
In the first direction X, in the central region 103, the spacing L2 between adjacent second tandem regions 62 is gradually reduced and then gradually increased (fig. 3), or the spacing L2 between adjacent second tandem regions 62 is the same (fig. 2).
Specifically, referring to fig. 3, the closer to the center of the substrate 10, the higher the current, by setting the distance L1 between adjacent first series connection regions 61 in the central region 103 along the first direction X, the distance L2 between adjacent second series connection regions 62 is gradually decreased and then gradually increased, so that the distance between the first series connection regions 61 at the center of the central region 103 is minimum, the distance between the second series connection regions 62 is minimum, the farther from the center, the larger the distance between the second series connection regions 62 is, so that the series connection regions have a larger density at the place where the current is high, the more efficient current collection is possible, the lower the current is, the lower the series connection region density is, and the material consumption can be reduced on the premise of better current collection.
In addition, the central area 103 may be provided with the same interval L1 between the adjacent first serial connection areas 61 and the same interval L2 between the adjacent second serial connection areas 62, so that the manufacturing difficulty of the solar cell can be reduced on the premise of ensuring better current collection.
On the basis of the above embodiment, optionally, the spacing L1 between adjacent first tandem regions 61 in the first edge region 101 is equal to the spacing L1 between adjacent first tandem regions 61 in the second edge region 102;
The spacing L2 between adjacent second tandem zones 62 in the first edge zone 101 is equal to the spacing L2 between adjacent second tandem zones 62 in the second edge zone 102.
Specifically, the first edge area 101 and the second edge area 102 are both located at the edge of the substrate 10, the current is similar, the distance L1 between the first serial connection areas 61 in the first edge area 101 and the second edge area 102 is equal, the distance L2 between the second serial connection areas 62 is equal, the manufacturing difficulty of the solar cell can be reduced, and the better current collection can be ensured.
Optionally, on the basis of the above embodiment, referring to fig. 3, the first surface includes a first edge 11 and a second edge 12 oppositely disposed along the first direction X;
along the direction of the first edge 11 toward the second edge 12, the spacing L1 between adjacent first tandem zones 61 is gradually decreased and then gradually increased, and/or the spacing L2 between adjacent second tandem zones 62 is gradually decreased and then gradually increased.
Specifically, along the first direction X, the current at the edge position of the substrate 10 is smaller, and the current at the central position is larger, and by setting the direction along the first edge 11 toward the second edge 12, the distance L1 between the adjacent first serial connection regions 61 is gradually reduced and then gradually increased, the distance L2 between the adjacent second serial connection regions 62 is gradually reduced and then gradually increased, that is, the distance between the first serial connection regions 61 gradually decreases from the edge position to the central position, and the distance between the second serial connection regions 62 gradually decreases, so that the closer to the central position, the denser the first serial connection regions 61 are, the denser the second serial connection regions 62 are, the better the current collection efficiency is improved, and the light conversion efficiency of the solar cell is improved.
Optionally, referring to fig. 1, the first tandem area 61 includes a plurality of first pads 51, and the first pads 51 are electrically connected to the second collecting grid lines 42 in the first tandem area 61 in a one-to-one correspondence manner;
the second serial connection region 62 includes a plurality of second bonding pads 52, and the second bonding pads 52 are electrically connected to the first collecting grid lines 41 in the second serial connection region 62 in a one-to-one correspondence manner;
the first pad 51 and the second pad 52 are for electrical connection with the solder.
Specifically, the carriers collected by the first collecting gate line 41 are transferred to the bonding pad through the second bonding pad 52, and the carriers collected by the second collecting gate line 42 are transferred to the bonding pad through the first bonding pad 51.
On the basis of the above embodiment, optionally, the line width of the portion of the second collecting gate line 42 located in the first tandem region 61 is larger than the line width of the other region, the first pad 51 is the second collecting gate line 42 located in the first tandem region 61, the line width of the portion of the first collecting gate line 41 located in the second tandem region 62 is larger than the line width of the other region, and the second pad 52 is the first collecting gate line 41 located in the second tandem region 62;
Or the first pad 51 is a conductive layer disposed on a side of the second collecting gate line 42 away from the substrate 10 or a side adjacent to the substrate 10, and the second pad 52 is a conductive layer disposed on a side of the first collecting gate line 41 away from the substrate 10 or a side adjacent to the substrate 20.
Specifically, the first collection gate line 41 in the second tandem region 62 may be thickened, and the thickened first collection gate line 41 may serve as the second pad 52. The second collection gate line 42 in the first tandem region 61 is thickened, and the thickened second collection gate line 42 serves as the first pad 51. The conductive layer may be provided alone as the first pad 51 or the second pad 52.
In addition, referring to fig. 1 and 2, the first surface of the substrate 10 further includes a first edge bus bar line 31 and a second edge bus bar line 32, the first edge bus bar line 31 being electrically connected to at least a portion of the first collecting bar line 41, and the second bus bar line 32 being electrically connected to at least a portion of the second bus bar line 42. The first surface of the substrate 10 further includes a first bus bar line 21 and a second bus bar line 22, the first bus bar line 21 being connected to at least a portion of the first collecting bar line 41 for collecting carriers on the first collecting bar line 41, the second bus bar line 21 being connected to at least a portion of the second collecting bar line 42 for collecting carriers on the second collecting bar line 42. The first bus gate line 21 may be located at the first edge region 101 and the second bus gate line 22 may be located at the second edge region 102. The first bus bar line 21 is connected to at least one second pad 52, and the second bus bar line 22 is connected to at least one first pad 51.
The embodiment of the application also provides a battery assembly, which comprises the solar battery in the embodiment.
The battery assembly can comprise a plurality of solar cells, the solar cells in the battery assembly can be sequentially connected in series to form a battery string, each battery string can be connected in series, in parallel or after being combined in series and parallel to realize current converging output, for example, connection among each battery piece can be realized by welding a welding strip, and connection among each battery string can be realized by a bus bar.
The battery assembly may also include a metal frame, a back sheet, photovoltaic glass, and a glue film. The adhesive film can be filled between the light-facing surface and the photovoltaic glass of the solar cell, between the backlight surface and the back plate, and between the adjacent cell sheets, and can be a transparent colloid with good light transmittance and ageing resistance, for example, the adhesive film can be an EVA adhesive film or a POE adhesive film, and the adhesive film can be specifically selected according to practical situations, and is not limited. The photovoltaic glass can be coated on a film of a light-facing surface of the solar cell, and can be super-white glass which has high light transmittance and high transparency and has excellent physical, mechanical and optical properties, for example, the light transmittance of the super-white glass can reach more than 92%, and the photovoltaic glass can protect the solar cell under the condition that the efficiency of the solar cell is not affected as much as possible. Meanwhile, the photovoltaic glass and the solar cell can be bonded together by the adhesive film, and the solar cell can be sealed and insulated and waterproof and moistureproof by the adhesive film.
The back plate can be attached to an adhesive film on the backlight surface of the solar cell, can protect and support the solar cell, has reliable insulativity, water resistance and aging resistance, can be selected multiple times, can be toughened glass, organic glass, an aluminum alloy TPT composite adhesive film and the like, and can be specifically set according to specific conditions without limitation. The whole of backplate, solar cell, glued membrane and photovoltaic glass constitution can set up on metal frame, and metal frame is as the main external support structure of whole battery module, and can carry out stable support and installation for the battery module, for example, can install the battery module in the position that needs the installation through metal frame.
The battery assembly of the embodiment of the application and the solar battery described in the above embodiment of the application belong to the same application conception, and have corresponding beneficial effects, and technical details not detailed in the embodiment are detailed in the solar battery described in any embodiment of the application.
The embodiment of the application also provides a photovoltaic module, which comprises the battery module in the embodiment.
The photovoltaic system can be applied to a photovoltaic power station, such as a ground power station, a roof power station, a water surface power station and the like, and can also be applied to equipment or devices for generating power by utilizing solar energy, such as a user solar power supply, a solar street lamp, a solar automobile, a solar building and the like. Of course, it is understood that the application scenario of the photovoltaic system is not limited thereto, that is, the photovoltaic system may be applied to all fields where solar energy is required to generate electricity. Taking a photovoltaic power generation system network as an example, the photovoltaic system can comprise a photovoltaic array, a junction box and an inverter, wherein the photovoltaic array can be an array combination of a plurality of battery assemblies, for example, the plurality of battery assemblies can form a plurality of photovoltaic arrays, the photovoltaic array is connected with the junction box, the junction box can conduct junction on current generated by the photovoltaic array, and the junction box is connected with a commercial power network after the junction current flows through the inverter and is converted into alternating current required by the commercial power network so as to realize solar power supply.
The beneficial effects of the photovoltaic system of this embodiment are identical to those of the above-mentioned battery assembly, and will not be described here in detail.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present application may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present application are achieved, and the present application is not limited herein.
The above embodiments do not limit the scope of the present application. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of the present application.
Claims (14)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202511375505.0A CN121152399A (en) | 2025-09-24 | 2025-09-24 | Solar cell, battery assembly and photovoltaic system |
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| CN202511375505.0A CN121152399A (en) | 2025-09-24 | 2025-09-24 | Solar cell, battery assembly and photovoltaic system |
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| CN202511375505.0A Pending CN121152399A (en) | 2025-09-24 | 2025-09-24 | Solar cell, battery assembly and photovoltaic system |
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