CN220253254U - Battery pack and photovoltaic device - Google Patents
Battery pack and photovoltaic device Download PDFInfo
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- CN220253254U CN220253254U CN202321347980.3U CN202321347980U CN220253254U CN 220253254 U CN220253254 U CN 220253254U CN 202321347980 U CN202321347980 U CN 202321347980U CN 220253254 U CN220253254 U CN 220253254U
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- 239000004020 conductor Substances 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
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- 229910052731 fluorine Inorganic materials 0.000 description 2
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- YZZNJYQZJKSEER-UHFFFAOYSA-N gallium tin Chemical compound [Ga].[Sn] YZZNJYQZJKSEER-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 239000004332 silver Substances 0.000 description 1
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The application provides a battery assembly and a photovoltaic device, wherein the battery assembly comprises a substrate and a plurality of battery packs positioned on the substrate; the battery pack comprises a plurality of first photovoltaic battery units, the plurality of first photovoltaic battery units are connected in series, and the plurality of battery packs are connected in parallel. The technical scheme of this application is favorable to promoting battery pack's use convenience.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery assembly and a photovoltaic device.
Background
Thin film photovoltaic cells, represented by perovskite cells, have been attracting attention because of their high photoelectric conversion efficiency, low cost, and the like. Compared with the mainstream crystalline silicon photovoltaic technology, the thin film photovoltaic cell is simpler and more efficient in large-area preparation process, so that the thin film photovoltaic cell can be directly manufactured into a large-area cell assembly.
The related art battery assembly generally interconnects a plurality of photovoltaic cells in series to achieve a higher voltage output. However, due to the limitation of the series structure, the battery assembly can only output specific voltage and current outwards, so that when the battery assembly is used for externally supplying power, the voltage output by the battery assembly is subjected to frequency modulation and voltage regulation treatment by an inverter and then is output outwards, so that the use requirements of different external products are met, and the battery assembly is inconvenient to use.
Disclosure of Invention
In view of the above, the present application provides a battery assembly and a photovoltaic device to solve the problem of inconvenient use of the battery assembly in the related art.
In one aspect, a battery assembly includes a substrate and a plurality of battery packs positioned on the substrate; the battery pack comprises a plurality of first photovoltaic battery units, the plurality of first photovoltaic battery units are connected in series, and the plurality of battery packs are connected in parallel.
In one embodiment, the battery assembly further comprises a second photovoltaic cell unit located on the substrate, the second photovoltaic cell unit is located between two adjacent battery packs, and the two adjacent battery packs are connected in parallel through the second photovoltaic cell unit.
In one embodiment, the plurality of battery packs includes a first battery pack and a second battery pack sequentially arranged in a first direction, each of the first photovoltaic cell unit and the second photovoltaic cell unit having a first electrode and a second electrode that are stacked;
for the first battery pack, a first electrode of one first photovoltaic cell unit is connected with a second electrode of the other first photovoltaic cell unit in two adjacent first photovoltaic cell units so as to enable the plurality of first photovoltaic cell units to be connected in series;
for the second battery pack, the second electrode of one first photovoltaic cell unit is connected with the first electrode of the other first photovoltaic cell unit in two adjacent first photovoltaic cell units so as to connect the first photovoltaic cell units in series;
the second electrodes of the second photovoltaic battery units are respectively connected with the first electrodes of the two adjacent first photovoltaic battery units.
In one embodiment, the plurality of battery packs includes a first battery pack and a second battery pack sequentially arranged in a first direction, each of the first photovoltaic cell unit and the second photovoltaic cell unit having a first electrode and a second electrode that are stacked;
for the first battery pack, the second electrode of one first photovoltaic cell unit is connected with the first electrode of the other first photovoltaic cell unit in two adjacent first photovoltaic cell units so as to connect the plurality of first photovoltaic cell units in series;
for the second battery pack, the first electrode of one first photovoltaic cell unit is connected with the second electrode of the other first photovoltaic cell unit in two adjacent first photovoltaic cell units so as to connect the first photovoltaic cell units in series;
the first electrodes of the second photovoltaic battery units are respectively connected with the second electrodes of the two adjacent first photovoltaic battery units.
In one embodiment, the number of first photovoltaic cells is a specific number, the specific number being an integer of 4 or more;
the second photovoltaic cell is configured to adjust the number of first photovoltaic cells in the first battery pack and the first photovoltaic cells in the second battery pack in the case where the arrangement position in the first direction changes.
In one embodiment, the electrodes which do not participate in series connection in the first battery pack, the second battery pack and the second photovoltaic battery unit form a first independent electrode, a second independent electrode and a third independent electrode in a one-to-one correspondence manner;
the battery assembly further comprises a first lead, a second lead and a third lead, wherein the first end of the first lead is connected with the first independent electrode, the first end of the second lead is connected with the second independent electrode, and the first end of the third lead is connected with the third independent electrode; when the first lead wire is connected with the second lead wire, the first battery pack is connected with the second battery pack in parallel.
In one embodiment, the battery assembly further includes a first bus bar between the first individual electrode and the first end of the first lead, a second bus bar between the second individual electrode and the first end of the second lead, and a third bus bar between the third individual electrode and the first end of the third lead.
In one embodiment, the first electrode is a front electrode and the second electrode is a back electrode.
In one embodiment, the front and back electrodes are transparent electrodes; alternatively, the front electrode is a transparent electrode and the back electrode is a non-transparent electrode.
Another aspect of the present application provides a photovoltaic device, including a device body and a battery assembly according to any of the above embodiments, where the battery assembly is connected to the device body to supply power to the device body.
The battery assembly and the photovoltaic device have the following beneficial effects: the first photovoltaic battery units in each battery pack are connected in series, and the battery packs are connected in parallel, so that the battery packs form an interconnection structure combining series connection and parallel connection. The interconnection structure is convenient for flexibly adjusting the number of the first photovoltaic battery units in each battery pack in the preparation process of the battery pack, so that the battery pack directly outputs the voltage and the current required by external products to the outside, different use requirements are met, and the use convenience of the battery pack is improved.
Drawings
Fig. 1 is a schematic plan view of a battery assembly.
Fig. 2 is a schematic cross-sectional structure of a battery assembly.
Fig. 3 is a schematic cross-sectional view showing a battery pack according to a first embodiment of the present application.
Fig. 4 is a schematic cross-sectional view showing a battery pack according to a second embodiment of the present application.
Fig. 5 is a schematic cross-sectional view showing a battery pack according to a third embodiment of the present application.
Fig. 6 is a schematic plan view of a battery module according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and 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 one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Fig. 1 is a schematic plan view of a battery assembly. Fig. 2 is a schematic cross-sectional structure of a battery assembly.
As shown in fig. 1 and 2, the related art battery assembly 1 generally interconnects a plurality of photovoltaic cells 10 in series to achieve a higher voltage output.
Specifically, the photovoltaic cells 10 include a first electrode 11, a functional layer 12, and a second electrode 13, the functional layer 12 includes a first carrier transport layer 121, a light absorption layer 122, and a second carrier transport layer 123, and among two adjacent photovoltaic cells 10, the first electrode 11 of one photovoltaic cell 10 is connected to the second electrode 13 of the other photovoltaic cell 10, so as to realize series connection of a plurality of photovoltaic cells 10. Incident light is incident to the light absorption layer 122 from the second electrode 13 of each photovoltaic cell 10, photons are absorbed by the light absorption layer 122 and stimulated to generate first carriers and second carriers, the first carriers are extracted and transmitted to the first electrode 11 by the first carrier transmission layer 121, so that the first carriers are transmitted in the plurality of photovoltaic cells 10 connected in series (the straight line with the arrow in fig. 2 is the flow direction of the first carriers), the second carriers are extracted and transmitted to the second electrode 13 by the second carrier transmission layer 123, so that the second carriers are transmitted in the plurality of photovoltaic cells 10 connected in series (the dotted line with the arrow in fig. 2 is the flow direction of the second carriers), and higher voltage output is achieved. Further, bus bars 14 are provided at both ends of the battery assembly 1 to collect current generated from the battery assembly 1.
However, due to the limitation of the serial structure, the battery assembly 1 can only output specific voltage and current, so when the battery assembly 1 is used for supplying power to the outside, the inverter 20 is generally required to be arranged for the battery assembly 1, the inverter 20 is connected with the connector 14A of one bus bar 14 through a lead (not marked in the figure), and the voltage output by the battery assembly 1 is subjected to frequency modulation and voltage regulation processing by the inverter 20 and then is output to the outside, so that different use requirements are met, and the battery assembly 1 is inconvenient to use.
In view of the above, the present application provides a battery assembly and a photovoltaic device to solve the problem of inconvenient use of the battery assembly in the related art. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Fig. 3 is a schematic cross-sectional view of a battery module according to a first embodiment of the present application.
As shown in fig. 3, the battery assembly 1 includes a substrate 30 and a plurality of battery packs 40 positioned on the substrate 30. The battery pack 40 includes a plurality of first photovoltaic cells 10A, the plurality of first photovoltaic cells 10A are connected in series, and the plurality of battery packs 40 are connected in parallel.
In the above-described configuration, the plurality of first photovoltaic cells 10A in each of the battery packs 40 are connected in series and the plurality of battery packs 40 are connected in parallel, so that the battery assembly 1 can form an interconnection structure in which the series-parallel connection is combined. The interconnection structure is convenient for flexibly adjusting the number of the first photovoltaic battery units 10A in each battery pack 40 in the preparation process of the battery assembly 1, so that the battery assembly 1 directly outputs the voltage and the current required by external products to the outside, different use requirements are met, and the use convenience of the battery assembly 1 is improved.
In one embodiment, as shown in fig. 3, the battery assembly 1 further includes a second photovoltaic cell 10B disposed on the substrate 30, the second photovoltaic cell 10B is disposed between two adjacent battery packs 40, and the two adjacent battery packs 40 are connected in parallel by the second photovoltaic cell 10B.
Illustratively, the plurality of battery packs 40 may be two or more. When there are two of the plurality of battery packs 40, then the two battery packs 40 may be connected in parallel by one second photovoltaic cell unit 10B. When the plurality of battery packs 40 is more than two, the plurality of battery packs 40 can be connected in parallel after the two adjacent battery packs 40 are connected in parallel through the second photovoltaic cell unit 10B; wherein the number of the second photovoltaic cells 10B is 1 less than the number of the plurality of battery packs 40.
As shown in fig. 2, the related art mainly uses a laser scribing technique to scribe grooves P1, P2, and P3 of the photovoltaic cell device, so as to form a cell assembly 1 in which a plurality of photovoltaic cells 10 are connected in series. According to the scheme, the two adjacent battery packs 40 are connected in parallel through the second photovoltaic battery unit 10B, so that the series-parallel structure can be realized by locally and simply adjusting the slotting and scribing positions of the P1, the P2 and the P3 slots in the preparation process, for example, the scribing position of the second photovoltaic battery unit 10B is only required to be adjusted, and the effect of adjusting the external output voltage and the external output current of the battery assembly 1 can be achieved under the condition that the preparation process is not changed.
In one embodiment, the first photovoltaic cell 10A and the second photovoltaic cell 10B include, but are not limited to, any one of a perovskite cell, a cadmium telluride (CdTe) thin film photovoltaic cell, and a copper indium gallium tin (GIGS, i.e., cu/In/Ga/Sn) thin film photovoltaic cell, which the present example is not limited to. In addition, the film structures of the first photovoltaic cell 10A and the second photovoltaic cell 10B may refer to the film structures of the photovoltaic cells 10 in the related art, and are not described herein. Wherein the first carrier transport layer 121 may be an electron transport layer and the second carrier transport layer 123 may be a hole transport layer; alternatively, the first carrier transport layer 121 may be a hole transport layer, and the second carrier transport layer 123 may be an electron transport layer. The types of the first carrier transport layer 121 and the second carrier transport layer 123 may be adjusted according to implementation requirements, which is not limited in this application.
In one embodiment, as shown in fig. 3, the plurality of battery packs 40 includes a first battery pack 40A and a second battery pack 40B sequentially arranged in the first direction D1. For example, referring to fig. 6 together, the first photovoltaic cell 10A and the second photovoltaic cell 10B may have a strip shape, and the first direction D1 is a width direction of the first photovoltaic cell 10A or the second photovoltaic cell 10B. The first photovoltaic cell 10A and the second photovoltaic cell 10B each have a first electrode 11 and a second electrode 13 that are stacked.
For the first battery pack 40A, the first electrode 11 of one first photovoltaic cell 10A is connected with the second electrode 13 of the other first photovoltaic cell 10A among the adjacent two first photovoltaic cells 10A so as to connect the plurality of first photovoltaic cells 10A in series.
For the second battery pack 40B, the second electrode 13 of one first photovoltaic cell 10A is connected with the first electrode 11 of the other first photovoltaic cell 10A in adjacent two first photovoltaic cells 10A to connect the first photovoltaic cells 10A in series.
The second electrodes 13 of the second photovoltaic cells 10B are connected to the first electrodes 11 of the two first photovoltaic cells 10A adjacent thereto, respectively.
Illustratively, the first battery pack 40A has M first photovoltaic cells 10A, and the second battery pack 40B has N first photovoltaic cells 10A, M and N each being an integer greater than 1. For example, fig. 3 shows an example of m=4 and n=4, which is not limited to this.
The M first photovoltaic cells 10A of the first battery pack 40A and the N first photovoltaic cells 10A of the second battery pack 40B are sequentially arranged in the first direction D1. In the first battery pack 40A, the first electrode 11 of the i-th first photovoltaic cell 10A is connected to the second electrode 13 of the i+1th first photovoltaic cell 10A to connect the M first photovoltaic cells 10A in series; 1.ltoreq.i < M, and i is an integer. In the second battery pack 40B, the second electrode 13 of the j-th first photovoltaic cell 10A is connected to the first electrode 11 of the j+1th first photovoltaic cell 10A to connect the N first photovoltaic cells 10A in series; 1.ltoreq.j < N, and j is an integer. The second electrode 13 of the second photovoltaic cell 10B is connected to the first electrode 11 of the mth first photovoltaic cell 10A in the first battery pack 40A and the first electrode 11 of the 1 st first photovoltaic cell 10A in the second battery pack 40B, respectively.
Based on this, it is possible to realize parallel connection of the first battery pack 40A and the second battery pack 40B by the second photovoltaic cell 10B such that the first carriers generated by the first battery pack 40A and the second battery pack 40B are both transmitted to the second photovoltaic cell 10 (the straight line with the arrow in fig. 3 shows the flow direction of the first carriers), and the second carriers generated by the second photovoltaic cell 10B are respectively transmitted to the first battery pack 40A and the second battery pack 40B (the broken line with the arrow in fig. 3 shows the flow direction of the second carriers) to output the required voltage and current to the outside.
In one embodiment, as shown in fig. 4, the plurality of battery packs 40 includes a first battery pack 40A and a second battery pack 40B sequentially arranged in the first direction D1. The first photovoltaic cell 10A and the second photovoltaic cell 10B each have a first electrode 11 and a second electrode 13 that are stacked.
For the first battery pack 40A, the second electrode 13 of one first photovoltaic cell 10A is connected with the first electrode 11 of the other first photovoltaic cell 10A among the adjacent two first photovoltaic cells 10A to connect the plurality of first photovoltaic cells 10A in series.
For the second battery pack 40B, the first electrode 11 of one first photovoltaic cell 10A is connected with the second electrode 13 of the other first photovoltaic cell 10A in adjacent two first photovoltaic cells 10A to connect the first photovoltaic cells 10A in series.
The first electrodes 11 of the second photovoltaic cells 10B are connected to the second electrodes 13 of the two first photovoltaic cells 10A adjacent thereto, respectively.
Illustratively, the first battery pack 40A has M first photovoltaic cells 10A, and the second battery pack 40B has N first photovoltaic cells 10A, M and N each being an integer greater than 1. For example, fig. 3 shows an example of m=4 and n=4, which is not limited to this.
The M first photovoltaic cells 10A of the first battery pack 40A and the N first photovoltaic cells 10A of the second battery pack 40B are sequentially arranged in the first direction D1. In the first battery pack 40A, the second electrode 13 of the i-th first photovoltaic cell 10A is connected to the first electrode 11 of the i+1th first photovoltaic cell 10A to connect the M first photovoltaic cells 10A in series; 1.ltoreq.i < M, and i is an integer. In the second battery pack 40B, the first electrode 11 of the j-th first photovoltaic cell 10A is connected to the second electrode 13 of the j+1th first photovoltaic cell 10A to connect the N first photovoltaic cells 10A in series; 1.ltoreq.j < N, and j is an integer. The first electrode 11 of the second photovoltaic cell 10B is connected to the second electrode 13 of the mth first photovoltaic cell 10A in the first battery pack 40A and the second electrode 13 of the 1 st first photovoltaic cell 10A in the second battery pack 40B, respectively.
Based on this, it is possible to realize parallel connection of the first battery pack 40A and the second battery pack 40B by the second photovoltaic cell unit 10B such that the first carriers generated by the second photovoltaic cell unit 10B are respectively transmitted to the first battery pack 40A and the second battery pack 40B (the straight line with the arrow in fig. 4 shows the flow direction of the first carriers), and the second carriers generated by the first battery pack 40A and the second battery pack 40B are both transmitted to the second photovoltaic cell unit 10 (the broken line with the arrow in fig. 4 shows the flow direction of the second carriers) to externally output the desired voltage and current. It should be noted that, the embodiments of fig. 3 and fig. 4 are only described by taking the case of connecting the first battery pack 40A and the second battery pack 40B in parallel by one second photovoltaic cell 10B, and the scheme of connecting the plurality of battery packs 40 in parallel by using the plurality of first photovoltaic cells 10B may be obtained by referring to the embodiments of fig. 3 and fig. 4, and will not be described herein.
In one embodiment, as shown in fig. 5, the number of the first photovoltaic cells 10A is a specific number, which is an integer of 4 or more. That is, the sum of M and N is a certain number.
The second photovoltaic cell 10B is configured to adjust the number of the first photovoltaic cells 10A in the first group of cells 40A and the first photovoltaic cells 10A in the second group of cells 40B in the case where the arrangement position in the first direction D1 is changed. Illustratively, taking fig. 3 as an example, the number of the first photovoltaic cells 10A is 8, and when the second photovoltaic cells 10B are arranged at the 5 th arrangement position, the number of the first photovoltaic cells 10A in the first battery pack 40A and the second battery pack 40B is 4; when the second photovoltaic cells 10B are arranged at the 3 rd arrangement position, the number of the first photovoltaic cells 10A in the first group of cells 40A is 2, and the number of the first photovoltaic cells 10A in the second group of cells 40B is 6. These two arrangements of the second photovoltaic cell 10B can make the battery assembly 1 output different voltages and currents to the outside.
It should be noted that, since the projected areas of the first photovoltaic cell unit 10A and the second photovoltaic cell unit 10B on the substrate 30 are all standard areas of the photovoltaic cell unit 10A in the art, in the preparation process of the battery assembly 1, by adjusting the arrangement positions of the second photovoltaic cell unit 10B in the first direction D1, the number of the first photovoltaic cell units 10A in the first battery pack 40A and the second battery pack 40B can be adjusted, so that the effect of adjusting and controlling the external output voltage and current of the battery assembly 1 can be achieved under the conditions that the area of the battery assembly 1 is not changed and the number of the battery assembly 1 is not changed.
In one embodiment, as shown in fig. 3 to 5, the electrodes of the first battery 40A, the second battery 40B, and the second photovoltaic cell 10B that do not participate in the series connection form a one-to-one correspondence of the first individual electrode, the second individual electrode, and the third individual electrode (not labeled in fig. 3 to 5).
Illustratively, as shown in fig. 3 and 5, in the first battery pack 40A, the second electrode 13 of the 1 st first photovoltaic cell 10A constitutes a first individual electrode; in the second battery pack 40B, the second electrode 13 of the nth first photovoltaic cell 10A constitutes a second independent electrode; the first electrode 11 of the second photovoltaic cell 10B constitutes a third independent electrode. As shown in fig. 4, in the first battery 40A, the first electrode 11 of the 1 st first photovoltaic cell unit constitutes a first individual electrode; in the second battery pack 40B, the first electrode 11 of the nth first photovoltaic cell 10A constitutes a second independent electrode; the second electrode 13 of the second photovoltaic cell 10B constitutes a third independent electrode.
The battery assembly 1 further includes a first lead 15, a second lead 16, and a third lead 17, the first end of the first lead 15 being connected to the first individual electrode, the first end of the second lead 16 being connected to the second individual electrode, the first end of the third lead 17 being connected to the third individual electrode. Wherein, when the first lead 15 is connected with the second lead 16, the first battery pack 40A is connected in parallel with the second battery pack 40B.
By providing the first lead 15, the second lead 16, and the third lead 17, the above-mentioned arrangement facilitates the connection to the outside by the first lead 15, the second lead 16, and the third lead 17, and facilitates the connection to the second lead 16 through the first lead 15, thereby realizing the parallel connection of the first battery pack 40A and the second battery pack 40B.
In one embodiment, referring to fig. 3, 4 and 6, the battery assembly 1 further includes a first bus bar 141, a second bus bar 142 and a third bus bar (not shown in fig. 3 and 4), the first bus bar 141 being located between the first independent electrode and the first end of the first lead 15, the second bus bar 142 being located between the second independent electrode and the first end of the second lead 16, and the third bus bar being located between the third independent electrode and the first end of the third lead 17.
In one example, the first bus bar 141 extends along the length direction D2 of the first individual electrode, and the first bus bar 141 is connected to the first end of the first lead 15 through its own connector 141A. The second bus bar 142 extends along the length direction D2 of the second individual electrode, and the second bus bar 142 is connected to the first end of the second lead 16 through its own connector 142A. The third bus bar extends in the longitudinal direction D2 of the third individual electrode and is connected to the first end of the third lead 17 through its own connector.
According to the scheme, the bus bars are arranged between the independent electrodes and the corresponding leads, so that the bus bars can be used for collecting the current generated by the battery assembly 1, and the power supply performance of the battery assembly 1 can be improved.
In one embodiment, the first electrode 11 is a front electrode and the second electrode 13 is a back electrode. The front electrode is an electrode of each photovoltaic cell facing the light incident side, and the back electrode is an electrode of each photovoltaic cell facing away from the light incident side.
In an alternative embodiment, both the front and back electrodes are transparent electrodes. Illustratively, the front electrode and the back electrode may be made of transparent conductive materials such as Indium Tin Oxide (ITO) and fluorine-containing tin oxide (FTO).
In another alternative embodiment, the front electrode is a transparent electrode and the back electrode is a non-transparent electrode. Illustratively, the front electrode may be made of transparent conductive materials such as Indium Tin Oxide (ITO) and fluorine-containing tin oxide (FTO). The material of the back electrode may be a non-transparent conductive material such as copper (Cu) or silver (Ag).
The present application also provides a photovoltaic device comprising a device body and the battery assembly 1 of any one of the above embodiments. The battery pack 1 is connected to the device body to supply power to the device body.
The device body may be an indoor photovoltaic device, an on-vehicle photovoltaic device, a distributed power station, a photovoltaic building integrated (Building Integrated Photovoltaic, abbreviated as BIPV), or the like, which is not limited in this embodiment.
In the above scheme, since the battery assembly 1 has the interconnection structure combining series and parallel connection, the interconnection structure is convenient for flexibly adjusting the number of the first photovoltaic battery units 10A in each battery pack 40 in the preparation process of the battery assembly 1, so that the battery assembly 1 can directly output the required voltage and current to the outside, and thus the battery assembly 1 can be utilized to directly supply power to the device body, the requirement on an inverter can be reduced or even eliminated, and the cost of the photovoltaic device can be effectively reduced.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model to the precise form disclosed, and any modifications, equivalents, and alternatives falling within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.
Claims (9)
1. A battery assembly comprising a substrate and a plurality of battery packs positioned on the substrate and electrically connected in parallel; the battery pack comprises a plurality of first photovoltaic battery units which are sequentially connected in series; the battery assembly further comprises a second photovoltaic cell unit positioned on the substrate, the second photovoltaic cell unit is positioned between two adjacent battery packs, and the two adjacent battery packs are connected in parallel through the second photovoltaic cell unit.
2. The battery assembly of claim 1, wherein the plurality of battery packs includes a first battery pack and a second battery pack arranged in sequence along a first direction, the first photovoltaic cell and the second photovoltaic cell each having a first electrode and a second electrode disposed in a stack;
for the first battery pack, a first electrode of one first photovoltaic cell unit is connected with a second electrode of the other first photovoltaic cell unit in two adjacent first photovoltaic cell units so as to enable the plurality of first photovoltaic cell units to be connected in series;
for the second battery pack, the second electrode of one first photovoltaic cell unit is connected with the first electrode of the other first photovoltaic cell unit in two adjacent first photovoltaic cell units so as to connect the first photovoltaic cell units in series;
and the second electrodes of the second photovoltaic battery units are respectively connected with the first electrodes of the two adjacent first photovoltaic battery units.
3. The battery assembly of claim 1, wherein the plurality of battery packs includes a first battery pack and a second battery pack arranged in sequence along a first direction, the first photovoltaic cell and the second photovoltaic cell each having a first electrode and a second electrode disposed in a stack;
for the first battery pack, the second electrode of one first photovoltaic cell unit is connected with the first electrode of the other first photovoltaic cell unit in two adjacent first photovoltaic cell units so as to enable the plurality of first photovoltaic cell units to be connected in series;
for the second battery pack, the first electrode of one first photovoltaic cell unit is connected with the second electrode of the other first photovoltaic cell unit in two adjacent first photovoltaic cell units so as to connect the first photovoltaic cell units in series;
the first electrodes of the second photovoltaic battery units are respectively connected with the second electrodes of the two adjacent first photovoltaic battery units.
4. The battery assembly according to any one of claims 2 or 3, wherein the number of the first photovoltaic cells is a specific number, the specific number being an integer of 4 or more;
the second photovoltaic cell unit is configured to adjust the number of first photovoltaic cell units in the first battery pack and the first photovoltaic cell units in the second battery pack in the case where the arrangement position in the first direction is changed.
5. The battery assembly according to claim 2 or 3, wherein the electrodes of the first battery, the second battery and the second photovoltaic cell unit which do not participate in series are in one-to-one correspondence to form a first independent electrode, a second independent electrode and a third independent electrode;
the battery assembly further comprises a first lead, a second lead and a third lead, wherein the first end of the first lead is connected with the first independent electrode, the first end of the second lead is connected with the second independent electrode, and the first end of the third lead is connected with the third independent electrode; wherein the first battery pack is connected in parallel with the second battery pack when the first lead is connected with the second lead.
6. The battery assembly of claim 5, further comprising a first bus bar between the first individual electrode and the first end of the first lead, a second bus bar between the second individual electrode and the first end of the second lead, and a third bus bar between the third individual electrode and the first end of the third lead.
7. The battery assembly of claim 2 or 3, wherein the first electrode is a front electrode and the second electrode is a back electrode.
8. The battery assembly of claim 7, wherein the front electrode and the back electrode are transparent electrodes; alternatively, the front electrode is a transparent electrode, and the back electrode is a non-transparent electrode.
9. A photovoltaic device comprising a device body and the battery assembly of any one of claims 1 to 8, the battery assembly being connected to the device body to supply power to the device body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321347980.3U CN220253254U (en) | 2023-05-30 | 2023-05-30 | Battery pack and photovoltaic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321347980.3U CN220253254U (en) | 2023-05-30 | 2023-05-30 | Battery pack and photovoltaic device |
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| CN220253254U true CN220253254U (en) | 2023-12-26 |
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| CN202321347980.3U Active CN220253254U (en) | 2023-05-30 | 2023-05-30 | Battery pack and photovoltaic device |
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