CN215731739U - Photovoltaic module and photovoltaic system - Google Patents
Photovoltaic module and photovoltaic system Download PDFInfo
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- CN215731739U CN215731739U CN202121449923.7U CN202121449923U CN215731739U CN 215731739 U CN215731739 U CN 215731739U CN 202121449923 U CN202121449923 U CN 202121449923U CN 215731739 U CN215731739 U CN 215731739U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The application provides a photovoltaic module and a photovoltaic system, wherein the photovoltaic module comprises at least one battery unit and at least one bypass diode, and each battery unit is connected with one bypass diode in parallel; each battery unit comprises a first battery string group and a second battery string group, the first battery string group and the second battery string group are connected in parallel, the first battery string group and the second battery string group respectively comprise a plurality of first battery strings and a plurality of second battery strings, the first battery strings are connected in parallel, the second battery strings are connected in parallel, the first battery strings are connected in series with the second battery strings in parallel, and each first battery string and each second battery string respectively comprise a plurality of serially-connected battery sheets.
Description
Technical Field
The application relates to the technical field of photovoltaic modules, in particular to a photovoltaic module and a photovoltaic system.
Background
The conventional model of the existing photovoltaic module is shown in fig. 1, and the module is composed of three identical circuit modules 4 and a protection diode of each circuit module 4, wherein each module 4 is formed by connecting two strings of battery strings 3 in series and then connecting the other two strings of battery strings 3 in parallel.
Although more battery pieces are placed in the photovoltaic module of the conventional type, the power of the module is increased, the voltage of the photovoltaic module is increased along with the increase of the battery pieces of the photovoltaic module, so that the designed photovoltaic module has a high-voltage phenomenon, the number of the modules accommodated by the same inverter at the system end is reduced, and the cost of the system end is increased.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the present application is to provide a photovoltaic module and a photovoltaic system, so as to solve the above problems.
In a first aspect, the present invention provides a photovoltaic module comprising: at least one battery unit and at least one bypass diode, each battery unit is connected with one bypass diode in parallel; each the battery unit includes first battery string group and second battery string group, first battery string group and second battery string group are parallelly connected, first battery string group and second battery string group all include a plurality of first battery strings and a plurality of second battery string, a plurality of first battery strings are parallelly connected, a plurality of second battery strings are parallelly connected, a plurality of parallelly connected first battery strings and a plurality of parallelly connected second battery strings establish ties, and each first battery string and second battery string all include the battery piece of a plurality of series connections.
In the photovoltaic module designed above, since the battery unit is connected in parallel with the bypass diode, two ends of the bypass diode can be used as voltage output ends, the voltage divided by the bypass diode and the voltage divided by the battery unit are output voltages, and since the first battery string group and the second battery string group in the battery unit are connected in parallel, the voltage divided by the first battery string group or the second battery string group is output voltage, since the plurality of first battery strings connected in parallel in the battery string group are connected in series with the plurality of second battery strings connected in parallel, under the assumption that the first battery string and the second battery string generate the same voltage as the battery string 3 in the conventional version, the battery string group designed in this application has a lower output voltage and a higher output current than a battery string group formed by directly connecting two battery strings in series in the conventional version, and thus the photovoltaic module designed in this application is a photovoltaic module designed for low voltage output, compared with the conventional version of the conventional version, the inverter has lower voltage output, so that the number of components accommodated by the same inverter at the system end is increased, and the cost of the system end is reduced.
In an optional implementation manner of the first aspect, first ends of the plurality of first battery strings of the first battery string group connected in parallel are connected to first ends of the plurality of second battery strings of the first battery string group connected in parallel, second ends of the plurality of first battery strings of the first battery string group connected in parallel are connected to anodes of the bypass diodes of the corresponding battery units, and second ends of the plurality of second battery strings of the first battery string group connected in parallel are connected to cathodes of the bypass diodes of the corresponding battery units; the first ends of the plurality of first battery strings of the second battery string group connected in series and parallel are connected with the first ends of the plurality of second battery strings of the second battery string group connected in series and parallel, the second ends of the plurality of first battery strings of the second battery string group connected in series and parallel are connected with the negative electrodes of the bypass diodes of the corresponding battery units, and the second ends of the plurality of second battery strings of the second battery string group connected in series and parallel are connected with the positive electrodes of the bypass diodes of the corresponding battery units.
In an optional embodiment of the first aspect, the number of the battery units and the number of the bypass diodes are multiple, multiple battery units are connected in series in sequence, each battery unit is connected in parallel with one bypass diode, and the bypass diodes connected in parallel in different battery units are different.
In an alternative embodiment of the first aspect, the bypass diodes of the plurality of battery cells connected in parallel are sequentially connected in series, such that the plurality of battery cells are sequentially connected in series.
In an alternative embodiment of the first aspect, the first and second battery strings are the same number.
In an optional implementation manner of the first aspect, the number of the first battery strings and the number of the second battery strings are two, first ends of two first battery strings of the first battery string group connected in parallel are connected to first ends of two second battery strings of the first battery string group connected in parallel, second ends of two first battery strings of the first battery string group connected in parallel are connected to anodes of bypass diodes of corresponding battery units, and second ends of two second battery strings of the first battery string group connected in parallel are connected to cathodes of bypass diodes of corresponding battery units; the first end parts of the two first battery strings of the second battery string group in parallel connection are connected with the first end parts of the two second battery strings of the second battery string group in parallel connection, the second end parts of the two first battery strings of the second battery string group in parallel connection are connected with the negative electrodes of the bypass diodes of the corresponding battery units, and the second end parts of the two second battery strings of the second battery string group in parallel connection are connected with the positive electrodes of the bypass diodes of the corresponding battery units.
In an alternative embodiment of the first aspect, the first and second battery strings are different in number.
In an optional implementation manner of the first aspect, the number of the first battery strings in each battery string group is two, the number of the second battery strings in each battery string group is three, a first end of the two first battery strings in parallel connection of the first battery string group is connected to a first end of the three second battery strings in parallel connection of the first battery string group, a second end of the two first battery strings in parallel connection of the first battery string group is connected to an anode of the bypass diode of the corresponding battery unit, and a second end of the three second battery strings in parallel connection of the first battery string group is connected to a cathode of the bypass diode of the corresponding battery unit; the first ends of the two first battery strings of the second battery string group connected in parallel are connected with the first ends of the three second battery strings of the second battery string group connected in parallel, the second ends of the two first battery strings of the second battery string group connected in parallel are connected with the negative electrodes of the bypass diodes of the corresponding battery units, and the second ends of the three second battery strings of the second battery string group connected in parallel are connected with the positive electrodes of the bypass diodes of the corresponding battery units.
In an optional embodiment of the first aspect, the number of the battery pieces of the first battery string and the second battery string is 5-20.
In a second aspect, the present invention provides a photovoltaic system comprising a photovoltaic module according to any one of the preceding embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic view of a first structure of a photovoltaic module provided in an embodiment of the present application;
fig. 2 is a second structural schematic diagram of a photovoltaic module provided in an embodiment of the present application;
fig. 3 is a schematic view of a third structure of a photovoltaic module provided in an embodiment of the present application;
fig. 4 is a fourth structural schematic diagram of a photovoltaic module provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a photovoltaic system provided in an embodiment of the present application.
Icon: 10-a photovoltaic module; 101-a battery cell; q1-bypass diode; a1 — a first battery string; a2 — a second battery string; a1 — first battery string; a2 — a second battery string; c-battery piece; an X-photovoltaic system.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
First embodiment
The present application provides a photovoltaic module 10 having a lower voltage output, resulting in lower cost, than the conventional version of fig. 1.
As shown in fig. 2, the photovoltaic module 10 includes at least one battery unit 101 and at least one bypass diode Q1, each battery unit 101 is connected in parallel with one bypass diode Q1, each battery unit 101 includes a first battery string a1 and a second battery string a2, the first battery string a1 and the second battery string a2 are connected in parallel, each of the first battery string a1 and the second battery string a2 includes a plurality of first battery strings a1 and a plurality of second battery strings a2, the plurality of first battery strings a1 are connected in parallel, the plurality of second battery strings a2 are connected in parallel, the plurality of first battery strings a1 and the plurality of second battery strings a2 are connected in series after being connected in parallel, each of the first battery strings a1 and each of the second battery strings a2 is formed by a plurality of battery plates C connected in series, and the polarities of the first battery strings a1 and the second battery strings a2 are opposite.
As a possible implementation manner, when the number of the battery units 101 and the bypass diodes Q1 is one, the structure of the photovoltaic module 10 is as shown in fig. 3, wherein a first end of the plurality of first battery strings a1 of the first battery string group a1 connected in parallel is connected to a first end of the plurality of second battery strings a2 of the first battery string group a1 connected in parallel, a second end of the plurality of first battery strings a1 of the first battery string group a1 connected in parallel is connected to the positive electrode of the bypass diode Q1, and a second end of the plurality of second battery strings a2 of the first battery string group a1 connected in parallel is connected to the negative electrode of the bypass diode Q1; a first end of the plurality of first cell strings a1 of the second cell string group a2 connected in parallel is connected to a first end of the plurality of second cell strings a2 of the second cell string group a2 connected in parallel, a second end of the plurality of first cell strings a1 of the second cell string group a2 connected in parallel is connected to a negative electrode of the bypass diode Q1, a second end of the plurality of second cell strings a2 of the second cell string group a2 connected in parallel is connected to a positive electrode of the bypass diode Q1, and both ends of the bypass diode Q1 are used as an output of the photovoltaic module 10.
As another possible embodiment, when the number of the battery units 101 and the number of the bypass diodes Q1 are multiple, the structure of the photovoltaic module 10 is as shown in fig. 2, the structure of the battery units 101 is the same as that of the battery units 101 when the number is one, and details are not repeated here, the battery units 101 are sequentially connected in series through the bypass diodes Q1 to achieve sequential series connection, and the positive and negative electrodes of the bypass diodes Q1 corresponding to the two battery units 101 at the head and the tail serve as the output of the photovoltaic module 10.
In the photovoltaic module designed as above, since the battery unit 101 is connected in parallel with the bypass diode Q1, two ends of the bypass diode Q1 can be used as voltage output terminals, the voltage divided by the bypass diode Q1 and the voltage divided by the battery unit 101 are output voltages, and since the first battery string group a1 and the second battery string group a2 in the battery unit 101 are connected in parallel, the voltage divided by the first battery string group a1 or the second battery string group a2 is an output voltage, since the plurality of first battery strings a1 connected in parallel in the battery string group are connected in series with the plurality of second battery strings a2 connected in parallel, the battery string group designed in this application has a lower output voltage and a higher output current than the battery string group formed by directly connecting two battery strings in series in fig. 1, assuming that the battery strings a1 or a2 generate the same voltage as the battery string 3 in fig. 1, and therefore, the photovoltaic module designed in this application is a photovoltaic module designed as a low-voltage output design, it has a lower voltage output relative to the conventional version of fig. 1, so that the number of components housed by the same inverter at the system side is increased, so that the system side cost is reduced.
In an optional implementation manner of this embodiment, the numbers of the first battery string a1 and the second battery string a2 in the battery string may be the same or different; when the number of the first battery string a1 and the second battery string a2 is the same, it may refer to fig. 2 or fig. 3; when the number of the first battery strings a1 and the second battery strings a2 is different, assuming that the number of the first battery strings a1 in each battery string is 2, and the number of the second battery strings a2 in each battery string is 3, taking the battery unit 101 and the bypass diode Q1 as an example, it can be shown in fig. 4 that a first end of two first battery strings a1 of the first battery string a1 connected in parallel is connected to a first end of three second battery strings a2 of the first battery string a1 connected in parallel, a second end of two first battery strings a1 of the first battery string a1 connected in parallel is connected to the positive pole of the bypass diode Q1, and a second end of three second battery strings a2 of the first battery string a1 connected in parallel is connected to the negative pole of the bypass diode Q1; a first end of the two first battery strings a1 of the second battery string a2 connected in parallel is connected to a first end of the three second battery strings a2 of the second battery string a2 connected in parallel, a second end of the two first battery strings a1 of the second battery string a2 connected in parallel is connected to a cathode of the bypass diode Q1, and a second end of the three second battery strings a2 of the second battery string a2 connected in parallel is connected to an anode of the bypass diode.
In an optional implementation manner of this embodiment, the numbers of the battery cells C in the first battery string a1 and the second battery string a2 may be the same or different; the number of the battery pieces C in the first battery string a1 and the second battery string a2 can be 5-20, and the types of the battery pieces C in the first battery string a1 and the second battery string a2 can be the same or different.
Second embodiment
The present application provides a photovoltaic system X, as shown in fig. 5, the photovoltaic system X includes a photovoltaic module 10, and the photovoltaic module 10 is the photovoltaic module 10 described in the foregoing first embodiment, and is not described herein again.
In the photovoltaic system designed as above, since the photovoltaic module with low voltage output designed in the first embodiment is adopted, the designed photovoltaic system can be connected with more photovoltaic modules 10 in series, thereby saving the cost from the system side.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A photovoltaic module, comprising: at least one battery unit and at least one bypass diode, each battery unit is connected with one bypass diode in parallel;
each the battery unit includes first battery string group and second battery string group, first battery string group and second battery string group are parallelly connected, first battery string group and second battery string group all include a plurality of first battery strings and a plurality of second battery string, a plurality of first battery strings are parallelly connected, a plurality of second battery strings are parallelly connected, a plurality of parallelly connected first battery strings and a plurality of parallelly connected second battery strings establish ties, and each first battery string and second battery string all include the battery piece of a plurality of series connections.
2. The photovoltaic module according to claim 1, wherein a first end of the plurality of first cell strings of the first cell string group connected in series is connected to a first end of the plurality of second cell strings of the first cell string group connected in series, a second end of the plurality of first cell strings of the first cell string group connected in series is connected to an anode of the bypass diode of the corresponding cell, and a second end of the plurality of second cell strings of the first cell string group connected in series is connected to a cathode of the bypass diode of the corresponding cell;
the first ends of the plurality of first battery strings of the second battery string group connected in series and parallel are connected with the first ends of the plurality of second battery strings of the second battery string group connected in series and parallel, the second ends of the plurality of first battery strings of the second battery string group connected in series and parallel are connected with the negative electrodes of the bypass diodes of the corresponding battery units, and the second ends of the plurality of second battery strings of the second battery string group connected in series and parallel are connected with the positive electrodes of the bypass diodes of the corresponding battery units.
3. The photovoltaic module according to claim 2, wherein the number of the battery units and the bypass diodes is multiple, the multiple battery units are connected in series in sequence, each battery unit is connected with one bypass diode in parallel, and the bypass diodes connected in parallel with different battery units are different.
4. The photovoltaic module of claim 3, wherein the bypass diodes connected in parallel with the plurality of cells are connected in series in sequence, such that the plurality of cells are connected in series in sequence.
5. The photovoltaic module of claim 1, wherein the first and second strings are equal in number.
6. The photovoltaic module according to claim 5, wherein the number of the first cell strings and the number of the second cell strings are two, a first end of the two first cell strings of the first cell string group connected in parallel is connected to a first end of the two second cell strings of the first cell string group connected in parallel, a second end of the two first cell strings of the first cell string group connected in parallel is connected to an anode of the bypass diode of the corresponding cell unit, and a second end of the two second cell strings of the first cell string group connected in parallel is connected to a cathode of the bypass diode of the corresponding cell unit;
the first end parts of the two first battery strings of the second battery string group in parallel connection are connected with the first end parts of the two second battery strings of the second battery string group in parallel connection, the second end parts of the two first battery strings of the second battery string group in parallel connection are connected with the negative electrodes of the bypass diodes of the corresponding battery units, and the second end parts of the two second battery strings of the second battery string group in parallel connection are connected with the positive electrodes of the bypass diodes of the corresponding battery units.
7. The photovoltaic module of claim 1, wherein the first and second strings of cells are different in number.
8. The photovoltaic module according to claim 7, wherein the number of the first cell strings in each cell string group is two, the number of the second cell strings in each cell string group is three, a first end of the two first cell strings in parallel connection of the first cell string group is connected to a first end of the three second cell strings in parallel connection of the first cell string group, a second end of the two first cell strings in parallel connection of the first cell string group is connected to an anode of the bypass diode of the corresponding cell, and a second end of the three second cell strings in parallel connection of the first cell string group is connected to a cathode of the bypass diode of the corresponding cell;
the first ends of the two first battery strings of the second battery string group connected in parallel are connected with the first ends of the three second battery strings of the second battery string group connected in parallel, the second ends of the two first battery strings of the second battery string group connected in parallel are connected with the negative electrodes of the bypass diodes of the corresponding battery units, and the second ends of the three second battery strings of the second battery string group connected in parallel are connected with the positive electrodes of the bypass diodes of the corresponding battery units.
9. The photovoltaic module according to claim 1, wherein the number of the battery pieces of the first battery string and the second battery string is 5-20.
10. A photovoltaic system comprising a photovoltaic module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449923.7U CN215731739U (en) | 2021-06-28 | 2021-06-28 | Photovoltaic module and photovoltaic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449923.7U CN215731739U (en) | 2021-06-28 | 2021-06-28 | Photovoltaic module and photovoltaic system |
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| CN215731739U true CN215731739U (en) | 2022-02-01 |
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| CN202121449923.7U Active CN215731739U (en) | 2021-06-28 | 2021-06-28 | Photovoltaic module and photovoltaic system |
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- 2021-06-28 CN CN202121449923.7U patent/CN215731739U/en active Active
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