CN216671663U - Photovoltaic module - Google Patents

Photovoltaic module Download PDF

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Publication number
CN216671663U
CN216671663U CN202123344873.9U CN202123344873U CN216671663U CN 216671663 U CN216671663 U CN 216671663U CN 202123344873 U CN202123344873 U CN 202123344873U CN 216671663 U CN216671663 U CN 216671663U
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China
Prior art keywords
photovoltaic module
battery
string
module
cell
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CN202123344873.9U
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Chinese (zh)
Inventor
邹建胜
许贵军
高纪凡
孙宇
耿越
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Trina Solar Changzhou Technology Co ltd
Trina Solar Co Ltd
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Trina Solar Co Ltd
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Priority to CN202123344873.9U priority Critical patent/CN216671663U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The embodiment of the utility model discloses a photovoltaic module. The photovoltaic component comprises a plurality of battery string modules which are connected in series between a positive pole of the component and a negative pole of the component; the plurality of cell string modules are arranged along the long side direction of the photovoltaic module; the battery string module comprises two battery string modules which are connected in parallel along the short side direction of the photovoltaic module; the battery string module comprises two battery string units which are connected in series along the long side direction of the photovoltaic module; the battery string unit comprises at least two battery strings which are connected in parallel along the long edge direction of the photovoltaic module; the cell string comprises a plurality of cell sheets which are connected in series along the short side direction of the photovoltaic module. This scheme makes the battery piece in each battery cluster module all transversely arrange along the width direction of glass board, and a plurality of battery cluster modules vertically arrange along the length direction of glass board, helps improving photovoltaic module's power through the quantity that increases the battery piece, still helps reducing photovoltaic module's BOS cost and manufacturing cost simultaneously.

Description

Photovoltaic module
Technical Field
The embodiment of the utility model relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module.
Background
With the introduction of large silicon chip technology, the high power requirement of the photovoltaic module is increased day by day, so that the size of the photovoltaic module is increased more and more, the production capacity of the existing glass factory in the industry is exceeded, the production requirement can be met only by upgrading and transforming equipment, and the production cost is increased.
At present, current photovoltaic module generally with the vertical parallelly connected setting of battery cluster, because the size restriction of battery piece, the width direction of subassembly can only vertically set up about 6 to 7 cluster battery clusters, otherwise the size breadth of subassembly can surpass the productivity of current glass factory, moreover, the high power demand of photovoltaic module is difficult to satisfy to the mode of arranging of this kind of battery cluster.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a photovoltaic module, which is used for increasing the number of battery pieces in the photovoltaic module, improving the power of the photovoltaic module and reducing the BOS cost and the manufacturing cost of the photovoltaic module.
An embodiment of the present invention provides a photovoltaic module, including: the battery pack comprises a component anode, a component cathode and a plurality of battery string modules connected in series between the component anode and the component cathode; the plurality of cell string modules are arranged along the long edge direction of the photovoltaic module;
the battery string module comprises two battery string modules which are connected in parallel along the short side direction of the photovoltaic module; the battery string module comprises two battery string units which are connected in series along the long edge direction of the photovoltaic module; the battery string unit comprises at least two battery strings which are connected in parallel along the long side direction of the photovoltaic module; the cell string comprises a plurality of cell pieces which are connected in series along the short side direction of the photovoltaic module.
Optionally, each battery string module is provided with a diode, and the diode is connected between the assembly anode and the assembly cathode and is connected in parallel with each battery string unit.
Optionally, the diode is connected between the two battery string units, the anode of the diode is connected with the cathode of the assembly and the cathode of the battery piece, and the cathode of the diode is connected with the anode of the assembly and the anode of the battery piece.
Optionally, the battery pack further comprises a first bus bar, one end of the first bus bar leads out the positive electrode of the battery pack, the other end of the first bus bar leads out the negative electrode of the battery pack, the plurality of battery string modules are connected in series through the first bus bar, two of the battery string modules are connected through the first bus bar, and the diode is connected to the first bus bar.
Optionally, at least one of the cell string modules is further connected in parallel with a second bus bar extending along a short side direction of the photovoltaic module, and the second bus bar is used for transmitting current.
Optionally, the second bus bar is connected in parallel between two adjacent battery string modules at the same time.
Optionally, the battery piece is a sliced battery piece.
Optionally, the slicing mode of the sliced battery piece is 1-to-2.
Optionally, the number of the battery pieces in each battery string is greater than 10.
Optionally, adjacent battery pieces in the battery string are electrically connected through solder strips or conductive adhesive.
The photovoltaic module provided by the embodiment of the utility model is characterized in that a plurality of battery pieces are arranged along the short side direction of the photovoltaic module to form a battery string in series, at least two battery strings are connected in parallel along the long side direction of the photovoltaic module to form a battery string unit, two battery string units are connected in series along the long side direction of the photovoltaic module to form a battery string module, two battery string modules are connected in parallel along the short side direction of the photovoltaic module to form a battery string module, so that the battery pieces in each battery string module are transversely arranged along the width direction of a glass plate, and the plurality of battery string modules are longitudinally arranged along the length direction of the glass plate to avoid the size limitation of the photovoltaic module exceeding the width direction of the glass plate, thereby increasing the number of the battery pieces in the photovoltaic module by increasing the number of the battery string modules arranged along the length direction of the glass plate on the basis of meeting the production capacity of the existing glass factory, and further improving the power of the photovoltaic module, the BOS cost and the manufacturing cost of the photovoltaic module are reduced.
Drawings
Fig. 1 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery string module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another battery string module according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another photovoltaic module provided by an embodiment of the utility model;
fig. 5 is a schematic structural diagram of another battery string module according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another photovoltaic module provided by an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another photovoltaic module provided in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the utility model provides a photovoltaic module. Fig. 1 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a battery string module according to an embodiment of the present invention, and the battery string module shown in fig. 2 may be the battery string module in fig. 1. With reference to fig. 1 and 2, the photovoltaic module includes: a positive assembly electrode "+", a negative assembly electrode "-", and a plurality of battery string modules 10 connected in series between the positive assembly electrode "+" and the negative assembly electrode "-"; the plurality of cell string modules 10 are arranged along the long side direction Y of the photovoltaic module; the battery string module 10 includes two battery string modules 20, and the two battery string modules 20 are connected in parallel along the short side direction X of the photovoltaic module; the cell string module 20 includes two cell string units 30, and the two cell string units 30 are connected in series along the long side direction Y of the photovoltaic module; the cell string unit 30 includes at least two cell strings 40, and the at least two cell strings 40 are connected in parallel along the long side direction Y of the photovoltaic module; the cell string 40 includes a plurality of cells 50 connected in series in the short side direction X of the photovoltaic module.
Specifically, the number of the battery string modules 10 in the photovoltaic module may be one, two, or more than two, and the number of the battery strings 40 connected in parallel in each battery string unit 30 may be two or more than two, fig. 1 schematically sets that the photovoltaic module includes three battery string modules 10, and the battery string unit 30 includes two battery strings 40 connected in parallel along the long side direction Y of the photovoltaic module, in practical applications, the number of the battery string modules 10 and the number of the battery strings 40 connected in parallel in the battery string unit 30 may be set according to the size and power requirements of the photovoltaic module, which is not limited in this embodiment.
The photovoltaic module generally includes a glass plate for covering the cell string module, the glass plate includes a long side and a short side, a long side direction Y of the photovoltaic module may be a direction in which the long side of the glass plate is located, that is, a length direction of the glass plate, and a short side direction X of the photovoltaic module may be a direction in which the short side of the glass plate is located, that is, a width direction of the glass plate.
Illustratively, the battery string 40 is disposed along the short side direction X, the upper and lower battery strings 40 are longitudinally connected in parallel to form the battery string unit 30, the upper and lower battery string units 30 are longitudinally connected in series to form the battery string module 20, the left and right battery string modules 20 are transversely connected in parallel to form the battery string module 10, and the plurality of battery string modules 10 are longitudinally connected in series between the assembly positive electrode "+" and the assembly negative electrode "-". All transversely arrange along the width direction of glass board through setting up the battery piece 50 among a plurality of battery cluster modules 10, and set up a plurality of battery cluster modules 10 and vertically arrange along the length direction of glass board, in order to avoid surpassing the width direction's of glass board size restriction, thereby on the basis that accords with current glass factory productivity, increase the quantity of the battery piece among the photovoltaic module through the quantity of the battery cluster module 10 that increases along the length direction of glass board, thereby improve photovoltaic module's power, help reducing photovoltaic module's System Balance (BOS) cost and manufacturing cost.
According to the technical scheme of the embodiment of the utility model, a plurality of battery pieces are arranged in series along the short side direction of a photovoltaic assembly to form a battery string, at least two battery strings are connected in parallel along the long side direction of the photovoltaic assembly to form a battery string unit, two battery string units are connected in series along the long side direction of the photovoltaic assembly to form a battery string module, two battery string modules are connected in parallel along the short side direction of the photovoltaic assembly to form a battery string module, so that the battery pieces in each battery string module are transversely arranged along the width direction of a glass plate, and the plurality of battery string modules are longitudinally arranged along the length direction of the glass plate to avoid the size limitation of the photovoltaic assembly exceeding the width direction of the glass plate, thereby increasing the number of the battery pieces in the photovoltaic assembly by increasing the number of the battery string modules arranged along the length direction of the glass plate on the basis of conforming to the production capacity of the existing glass factory, and further improving the power of the photovoltaic assembly, the BOS cost and the manufacturing cost of the photovoltaic module are reduced.
In conjunction with fig. 1 and 2, on the basis of the above-described embodiment, each battery string module 10 is optionally provided with a diode D connected between the assembly positive electrode "+" and the assembly negative electrode "-" and connected in parallel with each battery string unit 30. Specifically, the diode D is used to bypass the transmission current when part of the battery string units 30 cannot work, so as to avoid the photovoltaic module from being damaged due to the hot spot effect.
On the basis of the above embodiment, optionally, a diode D is connected between the two battery string units 30, the anode of the diode D is connected with the cathode "-" of the battery sheet 50, and the cathode of the diode D is connected with the anode of the battery sheet 50. Specifically, the diode D is connected between two battery string units 30 in each battery string module 20, and is connected in anti-parallel with the battery strings 40 in each battery string unit 30, so that the diode D can be used as a bypass diode of each battery string unit 30, and can perform a function of bypassing transmission current when the battery string units 30 cannot work, thereby avoiding the photovoltaic module from being damaged due to the hot spot effect.
On the basis of the above embodiment, optionally, the photovoltaic module further includes a first bus bar L1, one end of the first bus bar L1 leads out a positive electrode "+" of the module, and the other end of the first bus bar L1 leads out a negative electrode "-", the plurality of battery string modules 10 are connected in series through the first bus bar L1, two battery string modules 20 in each battery string module 10 are connected through the first bus bar L1, and the diode D is connected to the first bus bar L1. Specifically, the first bus bar L1 is parallel to the longitudinal direction Y of the photovoltaic module, and the first bus bar L1 is connected between the two cell string modules 20 of each cell string module 10, and functions to connect each cell string 40 and the diode D.
The photovoltaic module shown in fig. 1 is suitable for the case where the number of the cell strings 40 connected to each side of the first bus bar L1 is 2 × n, and n in this embodiment may be an even number, for example, n is 6.
The structure of the battery string module provided by the embodiment of the utility model can be various, and the structure of the battery string module connected between the anode of the component and the cathode of the component in series is not limited to one. Fig. 3 is a schematic structural diagram of another battery string module according to an embodiment of the present invention. In order to distinguish the battery string modules in fig. 1 and 3, the battery string module shown in fig. 3 is referred to as a first battery string module 60. Referring to fig. 3, alternatively, in one embodiment, the first cell string module 60 is provided to include two cell string units 30, and the two cell string units 30 are connected in parallel along the short side direction of the photovoltaic module; the cell string unit 30 includes at least two cell strings 40, and the at least two cell strings 40 are connected in parallel along the long side direction Y of the photovoltaic module; the cell string 40 includes a plurality of cells 50 connected in series in the short side direction X of the photovoltaic module. The first battery string module 60 is provided with a diode D connected in reverse parallel with each battery string unit 30.
Fig. 4 is a schematic structural diagram of another photovoltaic module provided in an embodiment of the present invention. In conjunction with fig. 2 to 4, optionally, at least part of the battery string modules connected between the assembly positive electrode "+" and the assembly negative electrode "-" are different in structure. Illustratively, the battery string module connected between the assembly positive electrode "+" and the assembly negative electrode "-" may include the battery string module 10, and may further include the first battery string module 60, and fig. 4 schematically provides that the photovoltaic assembly includes three battery string modules 10 and one first battery string module 60. In practical applications, the structure of the battery string module connected between the positive electrode "+" and the negative electrode "-" of the assembly can be set according to the size and power requirements of the photovoltaic assembly, which is not limited in this embodiment. The present embodiment is applicable to the case where the number of the cell strings 40 connected to each side of the first bus bar L1 is 2 × n, and n in the present embodiment may be an odd number, for example, n is 7.
Fig. 5 is a schematic structural diagram of another battery string module according to an embodiment of the present invention. In order to distinguish the battery string modules in fig. 3 and 5, the battery string module shown in fig. 5 is referred to as a second battery string module 70. With reference to fig. 3 and 5, the second battery string module 70 shown in fig. 5 is different from the first battery string module 60 shown in fig. 3 only in that the polarities of the battery pieces 50 are different, the positive electrode of each battery piece 50 in the first battery string module 60 is connected to the negative electrode of the diode D, and the negative electrode of each battery piece 50 in the second battery string module 70 is connected to the positive electrode of the diode D.
Fig. 6 is a schematic structural diagram of another photovoltaic module provided in an embodiment of the present invention. Referring to fig. 5 and 6, optionally, in one embodiment, a plurality of battery string modules connected in series between the assembly positive electrode "+" and the assembly negative electrode "-" are all the second battery string modules 70. Fig. 6 schematically illustrates that the photovoltaic module includes five second cell string modules 70, and in practical applications, the number of the second cell string modules 70 may be set according to the size and power requirement of the photovoltaic module, which is not limited in this embodiment. The present embodiment is applicable to the case where the number of the cell strings 40 connected to each side of the first bus bar L1 is 2 × n, and n in the present embodiment may be an odd number, for example, n is 5.
With reference to fig. 4 to 6, optionally, at least one cell string module is further connected in parallel with a second bus bar L2 extending in the short side direction X of the photovoltaic module, and the second bus bar L2 is used for transmitting current. The second bus bar L2 is a jumper that can transmit the assembly current under normal operating conditions. Fig. 5 shows a case where the first battery string modules 60 are connected in parallel with the jumper, and fig. 6 shows a case where each second battery string module 70 is connected in parallel with the jumper, in practical applications, the setting position of the jumper is not fixed, the battery string modules 10 may also be connected in parallel with the jumper, and whether each battery string module is connected in parallel with the jumper or not may be set according to the size and power requirements of the photovoltaic module.
Fig. 7 is a schematic structural diagram of another photovoltaic module provided in the embodiment of the present invention. Referring to fig. 7, alternatively, the second bus bar L2 is connected in parallel between two adjacent battery string modules at the same time. Fig. 7 schematically shows that the photovoltaic module includes five second cell string modules 70, and the second bus bar L2, i.e. the case where the jumper is connected in parallel between the last two second cell string modules 70 at the same time, enables two cell string modules to share one jumper, so as to save the amount of the jumper, and thus save the cost of the photovoltaic module.
On the basis of the above embodiments, the battery piece 50 is optionally a sliced battery piece. The slicing method of the battery piece 50 includes 1-cut 2, 1-cut 3, or other slicing methods may be used. By way of example, a 1-by-2 dicing approach is meant that a conventional size (e.g., 158mm by 158mm) of the cell pieces 1 is cut into 2, and each of the resulting cell pieces can be used as a cell piece 50 in a photovoltaic module. Similarly, the slicing manner of 1-to-3 means that the conventional size cell slice 1 is cut into 3, and each obtained cell slice can be used as a cell slice 50 in the photovoltaic module.
Optionally, the slicing manner of the sliced battery piece in this embodiment is 1-to-2. The advantage of this kind of setting is that can avoid the slice quantity too much and cause the electric energy loss of battery piece to increase. Alternatively, the slicing manner of the sliced battery piece in this embodiment may also be 1-to-3. Under the condition that the photovoltaic module encapsulates the same number of battery pieces, the slicing mode of cutting 1 into 3 is favorable for improving the power of the photovoltaic module, the open-circuit voltage Voc of the battery pieces obtained by the slicing mode of cutting 1 into 3 is smaller, the short-circuit current Isc is larger, and the BOS cost of the photovoltaic module is favorably reduced.
On the basis of the above embodiments, optionally, the number of the battery sheets 50 in each battery string 40 is greater than 10. For example, the number of the cells 50 in each cell string 40 may be 10 to 20, and in practical applications, the number of the cells 50 in each cell string 40 may be set according to the size ring of the short side direction of the photovoltaic module and the power requirement of the photovoltaic module, which is not limited in this embodiment.
On the basis of the above embodiments, the adjacent battery plates 50 in the battery string 40 are optionally electrically connected by solder strips or conductive adhesive. When the battery cells 50 are electrically connected by the conductive adhesive, the cell pitch between adjacent battery cells 50 may be a positive value or a negative value.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A photovoltaic module, comprising: the battery pack comprises a component anode, a component cathode and a plurality of battery string modules connected in series between the component anode and the component cathode; the plurality of cell string modules are arranged along the long edge direction of the photovoltaic module;
the battery string module comprises two battery string modules which are connected in parallel along the short side direction of the photovoltaic module; the battery string module comprises two battery string units which are connected in series along the long edge direction of the photovoltaic module; the battery string unit comprises at least two battery strings which are connected in parallel along the long side direction of the photovoltaic module; the cell string comprises a plurality of cell pieces which are connected in series along the short side direction of the photovoltaic module.
2. The assembly according to claim 1, wherein each of the string modules is provided with a diode connected between the assembly anode and the assembly cathode in parallel with each of the string units.
3. The assembly according to claim 2, wherein the diode is connected between the two cell string units, the anode of the diode is connected with the cathode of the assembly and the cathode of the cell, and the cathode of the diode is connected with the anode of the assembly and the anode of the cell.
4. The photovoltaic module according to claim 2, further comprising a first bus bar, one end of which leads out of the module positive electrode and the other end of which leads out of the module negative electrode, wherein the plurality of cell string modules are connected in series by the first bus bar, two of the cell string modules in each of the cell string modules are connected by the first bus bar, and the diode is connected to the first bus bar.
5. The photovoltaic module according to claim 1, wherein at least one of the cell string modules is further connected in parallel with a second bus bar extending in a short side direction of the photovoltaic module, the second bus bar being configured to transmit electric current.
6. The photovoltaic module according to claim 5, wherein the second bus bar is connected in parallel between two adjacent cell string modules at the same time.
7. The photovoltaic module of any of claims 1-6 wherein the cell pieces are sliced cell pieces.
8. The photovoltaic module according to claim 7, wherein the sliced cell pieces are sliced in a manner of 1-2.
9. The photovoltaic assembly of claim 7, wherein the number of the cells in each string is greater than 10.
10. The photovoltaic module of claim 7, wherein adjacent cells in the string are electrically connected by solder ribbons or conductive glue.
CN202123344873.9U 2021-12-28 2021-12-28 Photovoltaic module Active CN216671663U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115132867A (en) * 2022-07-06 2022-09-30 苏州阿特斯阳光电力科技有限公司 Photovoltaic module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115132867A (en) * 2022-07-06 2022-09-30 苏州阿特斯阳光电力科技有限公司 Photovoltaic module

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Effective date of registration: 20230802

Address after: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu

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Address before: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu

Patentee before: TRINA SOLAR Co.,Ltd.