CN210575973U - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
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- CN210575973U CN210575973U CN201921509448.0U CN201921509448U CN210575973U CN 210575973 U CN210575973 U CN 210575973U CN 201921509448 U CN201921509448 U CN 201921509448U CN 210575973 U CN210575973 U CN 210575973U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a photovoltaic module, include: the first battery pack and the second battery pack respectively comprise three battery strings connected in parallel; the diode group includes: a first diode, a second diode and a third diode; the battery arrangement directions of the battery strings in the first battery pack and the second battery pack are opposite, and the first battery pack and the second battery pack are connected in series; the 6 strings of battery strings are divided into a first part and a second part by a first virtual line and a second virtual line; the first battery pack and the first diode in the first part are first areas; the second battery pack and the third diode in the first part are a third area; the second part and the second diode are second areas. The utility model provides a photovoltaic module adopts battery series-parallel circuit structure and virtual line structure, and the photovoltaic module that will be sheltered from shields the short circuit, and the photovoltaic module that is not sheltered from normally generates electricity, reduces hot spot effect by a wide margin, has protected the subassembly material on the whole, has promoted the reliability of subassembly and has improved the generating efficiency when sheltered from.
Description
Technical Field
The utility model relates to a photovoltaic technology field especially relates to a photovoltaic module.
Background
The circuit structure of the conventional photovoltaic module is shown in fig. 1, the conventional photovoltaic module is formed by connecting 6 strings of battery pieces in series, each two strings of battery pieces are provided with a bypass diode, once shielding occurs, the effects of shielding and continuing power generation can be achieved, and meanwhile, the conventional photovoltaic module also has an anti-hot spot effect. However, due to the series circuit structure, once the module is shielded when being vertically arranged, when the shielding exceeds more than 20% of the area of one cell, even if all 3 bypass diodes are conducted, the shielding and shielding can not play a role in continuing power generation, at this time, the power output of the module is almost 0, and the module can not generate power at all; if the shielding does not exceed 20% of the area of the cell, 3 bypass diodes are not conducted, the power output of the module is greatly reduced at the moment, for example, the shielding is 15% of the area of the cell, the power output of the module is only 85% of the original power output at the moment, and the shielded part can generate serious hot spots, so that the long-term reliability of the raw material of the shielded part is affected, the defects of yellowing, burning and the like occur, and the long-term use of the module is affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a photovoltaic module to in solving the conventional art, the photovoltaic module erects to arrange and seriously descends the generating efficiency when sheltering from, and the serious problem of subassembly hot spot effect.
In order to achieve the above object, the utility model provides a following scheme:
a photovoltaic module, comprising: 6 strings of battery strings, a diode group, a first virtual line and a second virtual line; the 6 strings of battery strings are divided into a first battery pack and a second battery pack in equal; the first battery pack and the second battery pack respectively comprise three battery strings connected in parallel; the diode includes: a first diode, a second diode, and a third diode; the arrangement direction of the batteries in the battery string in the first battery pack is that the positive electrode faces upwards, and the negative electrode faces downwards; the arrangement direction of the batteries in the battery string in the second battery pack is that the positive electrode faces downwards, and the negative electrode faces upwards;
the anode of the first battery pack is connected with the cathode of the diode pack, and the cathode of the first battery pack is connected with the anode of the second battery pack; the cathode of the second battery pack is connected with the anode of the diode group; the positive electrode of the first battery pack is the circuit positive electrode of the photovoltaic module; the negative electrode of the second battery pack is the circuit negative electrode of the photovoltaic assembly;
dividing the 6 strings of battery strings into a first part and a second part; dividing the first battery pack and the first diode in the first portion into a first region using the first dummy line; dividing the second battery pack and the third diode in the first portion into a third region using the second virtual line; the second portion and the second diode are divided into a second region.
Optionally, one end of the first virtual line is connected to the anode of the first diode, and the other end of the first virtual line is connected to the cathode of the first battery pack in the first region; one end of the second virtual line is connected with the cathode of the third diode, and the other end of the second virtual line is connected with the anode of the second battery pack in the third region.
Optionally, the first region further includes a first interconnection line therein, which is used to divide the first battery pack in the first region into a plurality of first battery string units, where each of the first battery string units includes three battery strings connected in parallel.
Optionally, the second region further includes a second interconnection line, which is used to divide the first battery pack and the second battery pack in the second region into a plurality of second battery string units, where the second battery string units include three battery strings connected in parallel.
Optionally, the third region further includes a third interconnecting line therein, which is used to divide the second battery pack in the third region into a plurality of third battery string units, where each third battery string unit includes three battery strings connected in parallel.
Optionally, the first dummy line, the second dummy line, the first interconnection line, the second interconnection line, and the third interconnection line are all tin-coated copper strips.
Optionally, the lengths of the first virtual line and the second virtual line are equal.
Optionally, the 6 strings of battery strings have the same length.
Optionally, the diode is a bypass diode.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect: the utility model provides a photovoltaic module adopts the parallelly connected circuit structure of battery cluster, even photovoltaic module takes place to shelter from, through parallel connection's circuit structure, the circuit structure that does not shelter from still can effectively be connected, will be by the battery cluster on the battery cluster that shelters from current distribution other branch roads on, effectively solved photovoltaic module and taken place when sheltering from, the serious problem of hot spot effect of subassembly.
The virtual circuit is adopted, the whole photovoltaic module is divided into 3 regions through the connection of the virtual lines, each region is connected with a bypass diode in parallel through the virtual line, when the photovoltaic module is vertically arranged and shielded, the second diodes connected with the second regions in parallel are conducted, the second regions are short-circuited, the first regions and the third regions work normally and are not influenced by shielding, when the shielding area is larger than 80% but the first regions and the third regions are not shielded, the first regions and the third regions can work normally after the second regions to be shielded by the second diodes are short-circuited, the generated energy still can reach 75% of the generated energy of the whole photovoltaic module when the second regions are not shielded, meanwhile, the second regions are short-circuited and stop working, and the hot spot effect is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a diagram of a prior art circuit configuration;
fig. 2 is a circuit structure diagram according to an embodiment of the present invention.
Description of the symbols: the first cell group 1, the second cell group 2, the first virtual line 3, the second virtual line 4, the first interconnection line 5, the second interconnection line 6, the third interconnection line 7, the first diode 8, the second diode 9, the third diode 10, the first region 11, the second region 12, and the third region 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a photovoltaic module has solved in the conventional art, and photovoltaic module erects to arrange and seriously descends the generating efficiency when sheltering from, and the serious problem of subassembly hot spot effect.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a circuit structure diagram of the background art, as shown in the figure, a conventional photovoltaic module adopts 6 strings of battery pieces which are all connected in series, and a bypass diode is installed in every two strings of battery pieces, and once shielding occurs, the bypass diode can play a role in shielding and shielding to continue power generation.
The photovoltaic module generates electric energy by absorbing solar energy, once a certain part of the photovoltaic module is shielded and cannot absorb sunlight, the part cannot generate electricity, the current is 0, and the unshielded part continues to absorb the sunlight to continue generating electricity. And as long as a bypass diode is arranged on every two strings of battery pieces, namely a circuit is connected in parallel with every two strings of circuits connected in series, once the front row and the rear row of the assembly form partial shielding, other power generation areas can be conducted through the circuits of the bypass diodes to shield the shielded battery strings, and thus the power output of the unshielded part is formed.
However, once the photovoltaic module is blocked when being vertically arranged and the blocking area exceeds more than 20% of the area of one cell, even if all the 3 bypass diodes are conducted, the effect of shielding and blocking to continue generating power cannot be achieved, at this time, the power output of the module is almost 0, and the module cannot generate power at all; if the shielding does not exceed 20% of the area of the cell, 3 bypass diodes are not conducted, the power output of the module is greatly reduced, for example, the shielding is 15% of the area of the cell, the power output of the module is only 85% of the original power output, and the shielded part can generate serious hot spots, so that the long-term reliability of the raw material of the shielded part is affected, the defects of yellowing, burning and the like occur, and the long-term use of the module is affected.
Fig. 2 is the utility model discloses photovoltaic module's circuit diagram, as shown in the figure, the utility model provides a photovoltaic module, the photovoltaic module system includes: 6 strings of battery strings, diode groups, a first virtual line 3 and a second virtual line 4; the 6 strings of battery strings are divided into a first battery pack 1 and a second battery pack 2 in equal; the first battery pack 1 and the second battery pack 2 each include three battery strings connected in parallel; the diode includes: a first diode 8, a second diode 9, and a third diode 10; the arrangement direction of the cells in the cell string in the first cell group 1 is that the anode is upward and the cathode is downward; the arrangement direction of the cells in the cell string in the second cell group 2 is that the anode is downward and the cathode is upward;
the anode of the first battery pack 1 is connected with the cathode of the diode pack, and the cathode of the first battery pack 1 is connected with the anode of the second battery pack 2; the cathode of the second battery pack 2 is connected with the anode of the diode group; the positive electrode of the first battery pack 1 is the circuit positive electrode of the photovoltaic module; the negative electrode of the second battery pack 2 is the circuit negative electrode of the photovoltaic component;
dividing the 6 strings of battery strings into a first part and a second part; dividing the first battery pack 1 and the first diode 8 in the first portion into a first region 11 using the first virtual line 3; dividing the second battery pack 2 and the third diode 10 in the first part into a third region 13 using the second virtual line 4; the second part and the second diode 9 are divided into a second region 12. The first region 11 is controlled by the first diode 8, the power generation efficiency is seriously decreased when the first region 11 is shielded, the first diode 8 is turned on to short-circuit the first region 11, and the second region 12 and the third region 13 which are not shielded normally generate power; the second region 12 is controlled by the second diode 9, when the second region 12 is shielded, the power generation efficiency is seriously reduced, the second diode 9 is conducted to short-circuit the second region 12, and the first region 11 and the third region 13 which are not shielded normally generate power; the third region 13 is controlled by the third diode 10, when the third region 13 is shielded, the power generation efficiency is seriously reduced, the third diode 10 is conducted to short-circuit the third region 13, and the first region 11 and the second region 12 which are not shielded normally generate power.
The lengths of the first virtual line 3 and the second virtual line 4 are not fixed, and can be longer or shorter depending on the actual environment and the technical design of a manufacturing company, and generally are longer than 1/2 of the length of the component, and the preferred length is 3/4 of the length of the component;
the first virtual line 3 and the second virtual line 4 divide the photovoltaic module into 3 regions, the length and range of the 3 regions are also determined by the actual environment and the technical design of the manufacturing company, the length can be long or short, and the preferred length of the first region 11 and the third region 13 is 3/4 of the length of the photovoltaic module.
The utility model discloses introduced virtual circuit, divided into 3 regions with whole subassembly, every region is controlled by a bypass diode, in case the subassembly takes place to shelter from when arranging vertically, as long as shelter from the length scope that does not exceed the second region 12, the bypass diode of the second region 12 switches on, first region 11 and third region 13 still can generate electricity, and the generated energy still has about 75% of the normal during operation electricity generation of subassembly moreover.
One end of the first virtual line 3 is connected to the positive electrode of the first diode 8, and the other end of the first virtual line 3 is connected to the negative electrode of the first battery pack 1 in the first region 11; one end of the second virtual line 4 is connected to the cathode of the third diode 10, and the other end of the second virtual line 4 is connected to the anode of the second battery pack 2 in the third region 13.
The first area 11 further comprises a first interconnecting line 5 for dividing the first battery pack 1 in the first area 11 into a plurality of first battery string units, wherein the first battery string units comprise three battery strings connected in series and parallel; when any battery string in the first battery string unit has an internal hidden crack or an external shelter, the circuit structure without the internal hidden crack or the shelter can still be effectively connected, and the current on the battery string with the internal hidden crack or the external shelter is distributed to the battery strings of other branches.
The second region 12 further includes a second interconnecting line 6, which is used for dividing the first battery pack 1 and the second battery pack 2 in the second region 12 into a plurality of second battery string units, where the second battery string units include three battery strings connected in series and parallel; when any battery string in the second battery string unit is internally hidden or externally shielded, the circuit structure without internal hidden or unshielded can still be effectively connected, and the current on the battery string with internal hidden or external shielding is distributed to the battery strings of other branches, so that the protection of the photovoltaic component material is realized, and the reliability and the anti-hidden capability of the photovoltaic component are improved.
The third area 13 further includes third interconnecting lines 7 therein, which are used for dividing the second battery pack 2 in the third area 13 into a plurality of third battery string units, where each third battery string unit includes three battery strings connected in series and parallel; when any battery string in the third battery string unit has an internal hidden crack or an external shelter, the circuit structure without the internal hidden crack or the shelter can still be effectively connected, and the current on the battery string with the internal hidden crack or the external shelter is distributed to the battery strings of other branches.
When a certain cell piece on the photovoltaic module is partially shielded, the shielded part cannot generate electricity, current cannot flow from the shielded part, and therefore a hot spot effect is generated, a virtual line is additionally arranged in each cell group to connect three cell strings, and 3 cell strings which are originally isolated from each other are communicated. At this time, if a certain circuit is shielded to generate hot spots, the current which cannot flow can be automatically shunted to other 2 strings of battery strings, so that the generation of the hot spots can be greatly weakened, and the temperature of the shielded part of the assembly is reduced.
At 6 am, the solar incident angle is very low, the front row photovoltaic module can shield 70-80% of the area of the rear row photovoltaic module, so that the first region 11 and the third region 13 are also shielded, the module does not have power output at the moment, the solar irradiance is very weak at the moment generally, an inverter connected with the module cannot be started, the inverter works, the power station system does not generate power originally, and therefore the hot spot effect of the photovoltaic module is not influenced by the high shielding rate at the moment.
If the vertical row subassembly front stall is sheltered from to the back row production shadow, shelters from more than 20% of the area that has surpassed a battery piece, and traditional subassembly can not generate electricity, and through the length of adjusting first region 11 and third region 13, can make the utility model discloses a photovoltaic module receives only the second region 12 of influence, and first region 11 and third region 13 are not influenced, still generate electricity, that is to say, photovoltaic module still has 75% the generated energy about.
The first virtual line 3, the second virtual line 4, the first interconnecting line 5, the second interconnecting line 6 and the third interconnecting line 7 are all tin-coated copper strips. The first virtual line 3 and the second virtual line 4 are equal in length. The 6 battery strings are the same in length. The diode is a bypass diode.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. A photovoltaic module, comprising: 6 strings of battery strings, a diode group, a first virtual line and a second virtual line; the 6 strings of battery strings are divided into a first battery pack and a second battery pack in equal; the first battery pack and the second battery pack respectively comprise three battery strings connected in parallel; the diode group includes: a first diode, a second diode, and a third diode; the arrangement direction of the batteries in the battery string in the first battery pack is that the positive electrode faces upwards, and the negative electrode faces downwards; the arrangement direction of the batteries in the battery string in the second battery pack is that the positive electrode faces downwards, and the negative electrode faces upwards;
the anode of the first battery pack is connected with the cathode of the diode pack, and the cathode of the first battery pack is connected with the anode of the second battery pack; the cathode of the second battery pack is connected with the anode of the diode group; the positive electrode of the first battery pack is the circuit positive electrode of the photovoltaic module; the negative electrode of the second battery pack is the circuit negative electrode of the photovoltaic assembly;
dividing the 6 strings of battery strings into a first part and a second part; dividing the first battery pack and the first diode in the first portion into a first region using the first dummy line; dividing the second battery pack and the third diode in the first portion into a third region using the second virtual line; the second portion and the second diode are divided into a second region.
2. The photovoltaic module according to claim 1, wherein one end of the first virtual line is connected to the positive electrode of the first diode, and the other end of the first virtual line is connected to the negative electrode of the first cell group in the first region; one end of the second virtual line is connected with the cathode of the third diode, and the other end of the second virtual line is connected with the anode of the second battery pack in the third region.
3. The photovoltaic module according to claim 1, further comprising a first interconnection line in the first region for dividing the first battery pack in the first region into a plurality of first battery string units, wherein the first battery string units comprise three battery strings connected in parallel.
4. The photovoltaic module according to claim 3, further comprising a second interconnection line in the second region for dividing the first battery pack and the second battery pack in the second region into a plurality of second battery string units, wherein the second battery string units comprise three battery strings connected in parallel.
5. The photovoltaic module according to claim 4, further comprising third interconnection lines in the third area for dividing the second battery pack in the third area into a plurality of third battery string units, wherein the third battery string units comprise three battery strings connected in series and parallel.
6. The photovoltaic module of claim 5, wherein the first dummy line, the second dummy line, the first interconnect line, the second interconnect line, and the third interconnect line are tin-coated copper tape.
7. A photovoltaic module according to claim 1, wherein the first virtual line and the second virtual line are equal in length.
8. A photovoltaic module according to claim 1, wherein the 6 strings are of the same length.
9. A photovoltaic module according to claim 1, wherein the diode is a bypass diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921509448.0U CN210575973U (en) | 2019-09-11 | 2019-09-11 | Photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921509448.0U CN210575973U (en) | 2019-09-11 | 2019-09-11 | Photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210575973U true CN210575973U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921509448.0U Active CN210575973U (en) | 2019-09-11 | 2019-09-11 | Photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210575973U (en) |
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2019
- 2019-09-11 CN CN201921509448.0U patent/CN210575973U/en active Active
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