CN112531058A - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
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- CN112531058A CN112531058A CN201911228996.0A CN201911228996A CN112531058A CN 112531058 A CN112531058 A CN 112531058A CN 201911228996 A CN201911228996 A CN 201911228996A CN 112531058 A CN112531058 A CN 112531058A
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- 238000005192 partition Methods 0.000 claims abstract description 20
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000679 solder Inorganic materials 0.000 claims description 37
- 238000003466 welding Methods 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract 1
- 239000002313 adhesive film Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
-
- 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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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a photovoltaic module, which comprises: at least one battery cell group, it is same in the battery cell group, the lead wire busbar includes two sub-lead wire busbars, and the first battery cluster that has public extreme point wantonly with the second battery cluster respectively through two same diode of sub-lead wire busbar reverse parallel connection, be equipped with the lead-out wire on the lead wire busbar, central busbar includes at least one partition district, by the tip of two adjacent sub-central busbars that partition district formed with the lead wire busbar between the electricity respectively connect one the diode, adjacent two the tip of sub-central busbar is the end of drawing forth, two it is parallel to each other to draw forth the end, every it is parallel with the lead-out wire to draw forth the end. According to the photovoltaic module, the problem that the diode is easily subjected to reverse breakdown when the number of the cells in the photovoltaic module is increased is solved, and the outgoing line and the two outgoing ends are easier to perforate.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a photovoltaic module.
Background
In the related art, the number of the cell strings connected in parallel with each diode in the photovoltaic module is large, and the diodes are prone to be subjected to reverse breakdown when the number of the cells of the photovoltaic module is increased. Moreover, the bus bar lead-out wire of the photovoltaic module has higher perforation difficulty on the packaging adhesive film and the back plate, and is inconvenient to operate.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a photovoltaic module, which can avoid the problem of reverse breakdown of a diode, which is easily caused when the number of cells in the photovoltaic module is increased, and can reduce the difficulty of perforation.
A photovoltaic module according to an embodiment of the present invention includes: at least one battery cell group, the battery cell group comprises a first battery cell and a second battery cell, the first battery cell and the second battery cell are connected in parallel, the first battery cell comprises two first battery strings, the two first battery strings are connected in series, the second battery cell comprises two second battery strings, the two second battery strings are connected in series, the first battery string and the second battery string both comprise a plurality of battery sheets, the plurality of battery sheets are connected in series, in the same battery cell group, a first connecting point of the two first battery strings is electrically connected with a second connecting point of the two second battery strings through a lead bus bar, the lead bus bar comprises two sub-lead bus bars, and the first battery string and the second battery string which have a common endpoint arbitrarily are connected with the same diode through the two sub-lead bus bars in reverse parallel connection, the lead bus bars are provided with lead wires, one ends of the lead wires are electrically connected with the lead bus bars, the other ends of the lead wires extend towards the direction far away from the plane of the battery piece, a central bus bar is connected between the first battery unit and the second battery unit, the central bus bar comprises at least one partition area, the partition area is positioned between two public endpoints in the battery unit group, the central bus bar is divided into a plurality of sub-central bus bars by the partition area, the diode is electrically connected between the end parts of two adjacent sub-central bus bars formed by the partition area and the lead bus bar respectively, the end parts of two adjacent sub-central bus bars are lead-out ends, the lead-out ends extend towards the direction far away from the plane of the battery piece, and the two lead-out ends of two adjacent sub-central bus bars are parallel to each other, each leading-out end is parallel to the leading-out wire.
According to the photovoltaic module provided by the embodiment of the invention, the lead bus bars are electrically connected between the first connecting points of the two first battery strings and the second connecting points of the two second battery strings, and any first battery string and any second battery string with common end points are respectively connected with the same diode in a reverse parallel mode through the two sub-lead bus bars, so that each diode is only connected with one first battery unit and one second battery unit in parallel, the number of the battery strings in parallel connection with the diodes is reduced, the number of the battery pieces in each battery string is increased on the premise of ensuring that the diodes are not broken down, the problem that the diodes are easily broken down in a reverse direction when the number of the battery pieces in the photovoltaic module is increased is avoided, the number of the single-through battery pieces in reverse parallel connection with each diode is less, and the hot spot temperature is lower. In addition, through setting up two lead-out ends that are parallel to each other and set up the lead-out wire on the lead wire busbar to make every lead-out end parallel with the lead-out wire, make lead-out wire and two lead-out ends perforation direction unanimous on encapsulation glued membrane and backplate, reduced the perforation degree of difficulty, make the perforation convenient easier.
According to some embodiments of the invention, the lead-out wire and the two lead-out terminals are directly opposite to each other.
According to some embodiments of the invention, the lead-out wire and the two lead-out terminals are arranged to be staggered in a width direction of the center bus bar.
According to some embodiments of the invention, the outlet comprises: the first leading-out section is electrically connected with the lead bus bar, and the width of the first leading-out section is greater than that of the lead bus bar; and the second leading-out section is connected with the first leading-out section, and the second leading-out section is perpendicular to the first leading-out section.
According to some embodiments of the invention, the second lead-out section is located at a distance from one of the two lead-out terminals that is less than the distance from the other of the two lead-out terminals.
According to some embodiments of the invention, each of the lead-out terminals is formed by bending a portion of the corresponding center bus bar in a direction away from a plane in which the battery piece is located.
According to some embodiments of the invention, the distance between adjacent ones of the lead-out wire and two of the lead-out terminals is at least 2 mm.
According to some embodiments of the invention, the photovoltaic module further comprises: the battery pack comprises a junction box, wherein three bonding pads are arranged in the junction box, the outgoing line and the two outgoing ends are respectively electrically connected with the three bonding pads, and two diodes corresponding to the same battery cell group are arranged in the junction box.
According to some embodiments of the invention, the junction box is formed with a first hole and two second holes, the two second holes are respectively located at two sides of the first hole, the outgoing line passes through the first hole and is electrically connected with one of the three bonding pads, and the two outgoing terminals pass through the two second holes and are electrically connected with the other two of the three bonding pads.
According to some embodiments of the invention, the one of the three pads is located at one side of the first hole, the two second holes are respectively located at the other two sides of the first hole opposite to each other, and the other two of the three pads are respectively located at one side of the corresponding second hole far from the center of the first hole.
According to some embodiments of the invention, three of the pads are collectively arranged, and two of the diodes are located on both sides of the three pads.
According to some embodiments of the invention, a first electrical connection sheet, a second electrical connection sheet and a third electrical connection sheet are arranged in the junction box, one of the two diodes is electrically connected with the first electrical connection sheet and the second electrical connection sheet, and the other of the two diodes is electrically connected with the second electrical connection sheet and the third electrical connection sheet.
According to some embodiments of the invention, the one of the three pads is provided on the second electrical connection pad, and the other two of the three pads are provided on the first and third electrical connection pads, respectively.
According to some embodiments of the present invention, the first electrical connection sheet includes a first connection section and a second connection section connected to each other, the first connection section extending in a length direction of the junction box, the second connection section extending in a width direction of the junction box, the second electrical connection sheet being provided between the first electrical connection sheet and the third electrical connection sheet, the second electrical connection sheet includes an electrical connection sheet body and two connection portions, the two connection portions are respectively connected to both sides of the electrical connection sheet body, one of the three pads is provided on the electrical connection sheet body, the third electrical connection sheet includes a third connection section and a fourth connection section, the third connection section extends in the length direction of the junction box, the fourth connection section extends in the width direction of the junction box, the other two of the three pads are provided on the second connection section and the fourth connection section, respectively, the one of the two diodes is provided on one of the two connection portions, the pin of the one of the two diodes is electrically connected to the first connection section, the other of the two diodes is provided on the fourth connection section, and the pin of the other of the two diodes is electrically connected to the other of the two connection portions.
According to some embodiments of the invention, the photovoltaic module further comprises a cover plate and a back plate, the cover plate is arranged on the upper surface of the cell piece, the back plate is arranged on the lower surface of the cell piece, at least one first through hole and at least two second through holes are formed in the back plate, the lead-out wire penetrates through the first through hole to extend out of the surface of the back plate, the first through hole is one of circular, oval, oblong and polygonal, each lead-out end penetrates through the second through hole to extend out of the surface of the back plate, and the second through hole is at least one of circular, oval, oblong and polygonal.
According to some embodiments of the invention, the first and second perforations are both rectangular in shape.
According to some embodiments of the invention, four corners of the first and second through holes are rounded.
According to some embodiments of the invention, the back plate is a glass piece, and the first and second through holes are both circular in shape.
According to some embodiments of the invention, the two first battery strings and the two second battery strings are arranged in parallel, each of the first battery strings and each of the second battery strings include a plurality of solder ribbon groups, each of the solder ribbon groups includes a plurality of solder ribbons, the plurality of solder ribbons are electrically connected to the plurality of battery pieces in the corresponding first battery string and the corresponding second battery string, the plurality of solder ribbons extend in a string arrangement direction of the plurality of battery pieces and are parallel to each other, one end of the lead bus bar is located between the two solder ribbon groups of the two first battery strings, the other end of the lead bus bar is located between the two solder ribbon groups of the two second battery strings, and the lead bus bar is arranged at an interval from the two solder ribbon groups of the two first battery strings and the two solder ribbon groups of the two second battery strings.
According to some embodiments of the invention, the two first battery strings and the two second battery strings are arranged in parallel, and the end portions of two adjacent battery pieces in each first battery string and each second battery string are connected in a lap joint manner through conductive adhesive.
According to some embodiments of the invention, an insulator is disposed between the lead bus bar and the cell stack.
According to some embodiments of the present invention, the insulating member includes a first insulating section provided between two of the first cell strings, the first insulating section extending in a string arrangement direction of the plurality of battery pieces in the first cell string, and a second insulating section provided between two of the second cell strings, the second insulating section extending in a string arrangement direction of the plurality of battery pieces in the second cell string.
According to some embodiments of the invention, one end of the insulating member is located at an end of the first cell string far from the second cell string, and the other end of the insulating member extends to an end of the second cell string far from the first cell string along a string arrangement direction of the plurality of battery pieces in the same cell group.
According to some embodiments of the present invention, the plurality of battery cells in at least one of the battery cell groups constitute a battery cell array, the insulating member has a length greater than a length of the battery cell array and less than a distance between the first connection point and the second connection point, and a width greater than a width of the lead bus bar.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic electrical circuit diagram of a photovoltaic module according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the photovoltaic module shown in FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic electrical circuit diagram of a cell stack of a photovoltaic module according to an embodiment of the present invention;
fig. 5 is a schematic view of the lead-out wires and the lead-out terminals of the cell stack shown in fig. 4;
FIG. 6 is a schematic diagram of a first cell of a photovoltaic assembly according to an embodiment of the present invention;
FIG. 7 is a schematic structural view of a junction box of a photovoltaic module according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a first cell string of a photovoltaic module according to another embodiment of the present invention;
fig. 9 is a schematic view of the lead-out wires and the lead-out terminals of a battery cell stack according to another embodiment of the present invention.
Reference numerals:
100: a photovoltaic module;
1: a battery cell stack; 11: a first battery cell; 111: a first battery string;
1111: a battery piece; 1112: a first connection point; 1113: welding a band group; 11131: welding a strip;
12: a second battery cell; 121: a second battery string; 1211: a second connection point;
2: a lead bus bar; 21: a sub-lead bus bar; 211: an outgoing line;
2111: a first lead-out section; 2112: a second lead-out section; 22: an insulating member;
3: a diode; 31: a pin; 4: a center bus bar; 41: a partition region;
42: leading out the terminal; 43: a sub-center bus bar; 5: a junction box; 51: a pad;
52: a first hole; 53: a second hole; 54: a first electrical connection tab;
541: a first connection section; 542: a second connection section; 55: a second electrical connection pad;
551: an electrical connection sheet body; 552: a connecting portion; 56: a third electrical connection pad;
561: a third connection section; 562: a fourth connection section; 6: and (3) conductive adhesive.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A photovoltaic module 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 9.
As shown in fig. 1 to 6, a photovoltaic module 100 according to an embodiment of the present invention includes at least one cell group 1.
Specifically, the battery cell group 1 includes a first battery cell 11 and a second battery cell 12, the first battery cell 11 and the second battery cell 12 are connected in parallel, the first battery cell 11 includes two first battery strings 111, the two first battery strings 111 are connected in series, the second battery cell 12 includes two second battery strings 121, the two second battery strings 121 are connected in series, the first battery string 111 and the second battery string 121 each include a plurality of battery pieces 1111, and the plurality of battery pieces 1111 are connected in series. In the description of the present invention, "a plurality" means two or more.
In the same cell group 1, the first connection points 1112 of the two first cell strings 111 and the second connection points 1211 of the two second cell strings 121 are electrically connected by the lead bus bar 2, and the lead bus bar 2 includes two sub-lead bus bars 21. The two sub-lead bus bars 21 may be an integrally formed structure or a discrete structure, preferably, they are integrally formed structures, so as to facilitate the manufacturing. The first cell string 111 and the second cell string 121, which have a common end, are connected in reverse parallel to the same diode 3 through two sub-lead bus bars 21, respectively, and lead wires 211 are provided on the lead bus bars 2, one ends (e.g., lower ends in fig. 5) of the lead wires 211 are electrically connected to the lead bus bars 2, and the other ends (e.g., upper ends in fig. 5) extend in a direction away from the plane of the cell sheet 1111. A central bus bar 4 is connected between the first battery unit 11 and the second battery unit 12, the central bus bar 4 includes at least one partition area 41, the partition area 41 is located between two common endpoints in the battery cell group 1, the central bus bar 4 is partitioned into a plurality of sub-central bus bars 43 by the partition area 41, a diode 3 is electrically connected between the end of each of two adjacent sub-central bus bars 43 formed by the partition area 41 and the lead bus bar 2, the end of each of two adjacent sub-central bus bars 43 is a leading-out end 42, the leading-out end 42 extends in the direction away from the plane of the battery sheet 1111, the two leading-out ends 42 of two adjacent sub-central bus bars 43 are parallel to each other, and each leading-out end 42 is parallel to the leading-out wire 211.
For example, in the example of fig. 1, 2, 4 and 5, the photovoltaic module 100 includes three cell stacks 1, each cell stack 1 includes a first cell 11 and a second cell 12 connected in parallel, the first cell 11 includes two first cell strings 111 connected in series, the second cell 12 includes two second cell strings 121 connected in series, and the first cell string 111 and the second cell string 121 include a plurality of battery pieces 1111 connected in series. In the same cell group 1, the lead bus bars 2 are used to electrically connect the first connection points 1112 of the two first cell strings 111 and the second connection points 1211 of the two second cell strings 121. Wherein the two sub lead bus bars 21 of the lead bus bar 2 connect the first battery string 111 and the second battery string 121 having a common terminal to the same diode 3 in anti-parallel, respectively. The diode 3 can prevent the first battery unit 11 or the second battery unit 12 connected in parallel from generating a hot spot effect when being shielded. Moreover, since the output voltage across the photovoltaic module 100 is large when the plurality of battery slices 1111 are connected in series, the parallel arrangement of the first battery unit 11 and the second battery unit 12 can reduce the output voltage of the photovoltaic module 100 by half.
The center bus bar 4 is connected between the first battery cell 11 and the second battery cell 12, and the center bus bar 4 includes three partition regions 41, each partition region 41 being located between two common end points of the first battery string 111 and the second battery string 121 in the corresponding battery cell group 1. Referring to fig. 5, the lead-out lines 211 extend in a direction away from the plane of the battery sheet 1111. The central bus bar 4 is divided into four sub-central bus bars 43 by the three partition areas 41, the opposite end parts of two adjacent sub-central bus bars 43 are lead-out ends 42, the two lead-out ends 42 extend in the direction away from the plane where the battery piece 1111 is located and are parallel to each other, one diode 3 is electrically connected between each two lead-out ends 42 and the lead bus bar 2, and the lead-out ends 42 are parallel to the lead-out lines 211. It should be noted that, when the outgoing line 211 and the two outgoing terminals 42 are in the sheet structure shown in fig. 5, the planes of the two outgoing terminals 42 are parallel, and the plane of the outgoing line 211 is parallel to the plane of the two outgoing terminals 42; when the lead-out wire 211 or the two lead-out terminals 42 have other structures such as a triangular prism structure (i.e., the lead-out wire 211 or the two lead-out terminals 42 have a triangular cross section), referring to fig. 9, at least two side surfaces of the two lead-out terminals 42 are parallel to each other, and at least one side surface of the lead-out wire 211 is parallel to the at least two side surfaces. The lead line 211 and the two lead terminals 42 may extend perpendicular to the plane of the battery piece 1111 (as shown in fig. 5), that is, the included angle between the lead line 211 and the plane of the battery piece 1111 and the included angle between the two lead terminals 42 and the plane of the battery piece 1111 may be 90 °. Of course, the present invention is not limited thereto, and the lead line 211 and the two lead terminals 42 may extend obliquely with respect to the plane of the battery piece 1111, that is, the lead line 211, the two lead terminals 42 and the plane of the battery piece 1111 may not be included at 90 ° (not shown), as long as it is ensured that the two lead terminals 42 are parallel to each other and the lead line 211 and the lead terminal 42 are parallel to each other.
Thus, with the above arrangement, each diode 3 is connected in parallel with only one first battery unit 11 and one second battery unit 12, and compared with the conventional parallel connection of each diode 3 with two first battery units 11 and two second battery units 12, the number of battery strings connected in parallel with the diodes 3 is reduced, and on the premise that the diodes 3 are not broken down, the number of battery slices 1111 in each battery string is increased, thereby avoiding the problem that the diodes 3 are easily broken down in the reverse direction when the number of battery slices 1111 in the photovoltaic module 100 is increased. Moreover, compared with the existing photovoltaic module with the same number of cells, the number of the single-string cells 1111 connected in parallel in each diode 3 is less, and the hot spot temperature is lower. In addition, through setting up two leading-out ends 42 that are parallel to each other and set up lead-out wire 211 on lead wire busbar 2 to make every leading-out end 42 be parallel with lead-out wire 211, lead-out wire 211 and two leading-out ends 42 are unanimous at the perforation direction on packaging adhesive film and backplate, have reduced the perforation degree of difficulty, make the perforation convenient and easy more.
Three cell stacks 1 and three partition regions 41 are shown in fig. 1-3 for illustrative purposes, but it will be apparent to those of ordinary skill after reading the technical solutions of the present application that the solutions can be applied to other numbers of cell stacks 1 and partition regions 41 and fall within the scope of the present invention.
According to the photovoltaic module 100 of the embodiment of the present invention, by electrically connecting the lead bus bars 2 between the first connection points 1112 of the two first cell strings 111 and the second connection points 1211 of the two second cell strings 121, and any first battery string 111 and second battery string 121 having a common terminal are connected in reverse parallel to the same diode 3 through two sub-lead bus bars 21, respectively, such that each diode 3 is connected in parallel to only one first battery cell 11 and one second battery cell 12, reducing the number of battery strings in which the diodes 3 are connected in parallel, on the premise of ensuring that the diode 3 is not broken down, the number of the battery slices 1111 in each battery string is increased, thereby avoiding the problem of reverse breakdown of the diode 3 which is easily caused when the number of the battery slices 1111 in the photovoltaic module 100 is increased, and the number of the single-through battery slices 1111 which are reversely connected in parallel with each diode 3 is less, and the hot spot temperature is lower. In addition, through setting up two leading-out ends 42 that are parallel to each other and set up lead-out wire 211 on lead wire busbar 2 to make every leading-out end 42 be parallel with lead-out wire 211, lead-out wire 211 and two leading-out ends 42 are unanimous at the perforation direction on packaging adhesive film and backplate, have reduced the perforation degree of difficulty, make the perforation convenient and easy more.
In some embodiments of the invention, referring to fig. 5, the lead-out wire and the two lead-out terminals are directly opposite to each other. So set up, two distances of drawing forth between end and the lead-out wire are less relatively to can reduce the perforation area, reduce the transmissivity of steam.
In other embodiments of the present invention, the lead-out wire 211 is arranged offset from the two lead-out terminals 42 in the width direction of the center bus bar 4 (not shown). Due to the arrangement, the outgoing line 211 is high in degree of freedom, can be directly welded on the bonding pad 51, and does not need to be drilled on the copper sheet of the junction box 5, so that the processing difficulty is reduced.
In some embodiments of the invention, as shown in FIG. 5, pinout 211 includes a first pinout section 2111 and a second pinout section 2112. Specifically, the first lead-out section 2111 is electrically connected to the lead bus bar 2, and the width of the first lead-out section 2111 is larger than that of the lead bus bar 2, the second lead-out section 2112 and the first lead-out section 2111 are connected to each other, and the second lead-out section 2112 and the first lead-out section 2111 are perpendicular to each other. For example, in the example of fig. 5, the lead-out line 211 is substantially "L" shaped, and the lead-out line 211 includes a first lead-out section 2111 and a second lead-out section 2112 connected to each other, wherein the lead bus bar 2 is electrically connected to the first lead-out section 2111, and the second lead-out section 2112 is parallel to the two lead-out terminals 42. Therefore, the first lead-out section 2111 is electrically connected with the lead bus bar 2, and the width of the first lead-out section 2111 is greater than that of the lead bus bar 2, so that the electrical connection between the lead-out wire 211 and the lead bus bar 2 is more reliable, and the structural stability of the whole photovoltaic module 100 is improved.
Alternatively, referring to fig. 5, the second lead-out section 2112 is located at a distance from one of the two lead-out terminals 42 that is less than the distance from the other of the two lead-out terminals 42. So set up, the second is drawn forth section 2112 and is drawn forth the distance inequality between the end 42 with two, convenient processing, and it is easier to make the second draw forth section 2112 and two draw forth the perforation of end 42 on encapsulation glued membrane and backplate, convenient operation.
Alternatively, referring to fig. 5, each of the lead-out terminals 42 is formed by bending a portion of the corresponding center bus bar 4 toward a direction away from the plane in which the battery piece 1111 is located. For example, when the lead-out line 211 and the two lead-out terminals 42 have a sheet-like structure (as shown in fig. 5), the planes of the two lead-out terminals 24 are parallel, and the plane of the lead-out line 211 is parallel to the plane of the two lead-out terminals 42; when the lead wire 211 or the two lead terminals 42 have another structure such as a triangular prism structure (i.e., the cross section of the lead wire 211 or the two lead terminals 42 is triangular), referring to fig. 9, the surfaces of the two lead terminals 42 to be attached to the battery piece 1111 before being bent are parallel to each other, and the surfaces of the two lead terminals 42 to be attached to the battery piece 1111 before being bent are parallel to the surfaces of the lead wire 211 to be attached to the battery piece 1111 before being bent. From this, simple structure, convenient processing has guaranteed diode 3 and first battery unit 11 and second battery unit 12's joint strength, and is favorable to realizing the automatic welding of central busbar 4 to can improve the preparation efficiency, use manpower sparingly.
Alternatively, the distance between adjacent ones of the lead-out lines 211 and the two lead-out terminals 42 is at least 2 mm. That is, the distances between the lead-out wire 21 and the two lead-out terminals 42 are respectively at least 2 mm. Therefore, the conversion efficiency of the photovoltaic module 100 is ensured, meanwhile, the sufficient heat dissipation space of the battery piece 1111 can be ensured, and the reliability of the photovoltaic module 100 is ensured.
In a further embodiment of the present invention, referring to fig. 7, the photovoltaic module 100 further includes a junction box 5, three pads 51 are disposed in the junction box 5, the lead-out wire 211 and the two lead-out terminals 42 are electrically connected to the three pads 51, respectively, and two diodes 3 corresponding to the same cell group 1 are disposed in the junction box 5. Thus, by electrically connecting the lead-out line 211 and the two lead-out terminals 42 to the three pads 51, respectively, a secure connection of the battery cell group 1 and the junction box 5 is ensured, so that the electric power generated by the photovoltaic module 100 is connected to an external line, and the electric current generated by the photovoltaic module 100 is conducted. By arranging the two diodes 3 corresponding to the same battery cell group 1 in the junction box 5, the influence of hot spots on the photovoltaic module 100 is reduced, and the structure of the photovoltaic module 100 is simplified.
Further, as shown in fig. 7, a first hole 54 and two second holes 53 are formed on the terminal block 5, the two second holes 53 are respectively located at both sides of the first hole 52, the lead-out wire 211 passes through the first hole 52 and is electrically connected to one of the three pads 51, and the two lead-out terminals 42 pass through the two second holes 53 respectively and are electrically connected to the other two of the three pads 51. Therefore, through the arrangement, the lead-out wire 211 penetrates through the first hole 52 to be welded with the corresponding pad 51, and the two lead-out ends 42 penetrate through the two second holes 53 to be welded with the corresponding pad 51, so that the lead-out wire 211 is prevented from being in contact with the two lead-out ends 42 to cause short circuit, and the reliability of the photovoltaic module 100 is guaranteed.
Further, referring to fig. 7, the one of the three pads 51 is located at one side of the first hole 52, the two second holes 53 are respectively located at the other two sides of the first hole 52 opposite to each other, and the other two of the three pads are respectively located at one side of the corresponding second hole 53 away from the center of the first hole 52. For example, in the example of fig. 7, two second holes 53 are located on the left and right sides of the first hole 52, respectively, and three pads 51 are located on the left side of the left second hole 53, the right side of the first hole 52, and the right side of the right second hole 53, respectively. The lead wire 211 passes through the first hole 52 and is electrically connected to the right pad 51 of the first hole 52, and the two lead terminals 42 pass through the two second holes 53 and are electrically connected to the left and right pads 51, respectively. With the arrangement, the lead-out wire 211, the two lead-out ends 42 and the three bonding pads 51 are connected more easily, and the processing difficulty is reduced.
Alternatively, as shown in fig. 7, three pads 51 are collectively provided, and two diodes 3 are located on both sides of the three pads 51. Therefore, the three welding pads 51 are arranged in a centralized manner, so that the processing is convenient, and the automatic welding of the junction box 5 is facilitated; by locating two diodes 3 on either side of the three pads 51, the distance between the two diodes 3 is relatively increased, thereby effectively reducing the junction temperature.
In some embodiments of the present invention, referring to fig. 7, a first electrical connection pad 54, a second electrical connection pad 55 and a third electrical connection pad 56 are provided in the junction box 5, one of the two diodes 3 is electrically connected to the first electrical connection pad 54 and the second electrical connection pad 55, and the other of the two diodes 3 is electrically connected to the second electrical connection pad 55 and the third electrical connection pad 56. For example, in the example of fig. 7, two diodes 3 are respectively located on the left and right sides of the four pads 51. The left diode 3 is electrically connected to the first electrical connection pad 54 and the second electrical connection pad 55, and the right diode 3 is electrically connected to the second electrical connection pad 55 and the third electrical connection pad 56. Therefore, by arranging the first electrical connection sheet 54, the second electrical connection sheet 55 and the third electrical connection sheet 56, the two diodes 3 are distributed at two ends of the junction box 5, so that the heat sources of the diodes 3 can be separated, and the junction temperature can be reduced.
Further, as shown in fig. 7, the above-mentioned one of the three lands 51 is provided on the second electrical connection sheet 55, and the above-mentioned other two of the three lands 51 are provided on the first electrical connection sheet 54 and the third electrical connection sheet 56, respectively. Thereby, the lead-out wire 211, the two lead-out terminals 42 and the two diodes 3 are electrically connected, and the structure is simple and easy to realize.
In some embodiments of the present invention, referring to fig. 7, the first electrical connection sheet 54 includes a first connection section 541 and a second connection section 542 connected to each other, the first connection section 541 extends in a length direction of the junction box 5, the second connection section 542 extends in a width direction of the junction box 5, the second electrical connection sheet 55 is provided between the first electrical connection sheet 54 and the third electrical connection sheet 56, the second electrical connection sheet 55 includes an electrical connection sheet body 551 and two connection portions 552, the two connection portions 552 are respectively connected to both sides of the electrical connection sheet body 551, the above-mentioned one of the three pads 51 is provided on the electrical connection sheet body 551, the third electrical connection sheet 56 includes a third connection section 561 and a fourth connection section 562, the third connection section 561 extends in the length direction of the junction box 5, the fourth connection section 562 extends in the width direction of the junction box 5, the above-mentioned other two of the three pads 51 are respectively provided on the second connection section 542 and the fourth connection section 562, the above-mentioned one of the two diodes 3 is provided on one of the two connection portions 552, the pin 31 of the above-mentioned one of the two diodes 3 is electrically connected to the first connection section 541, the above-mentioned other of the two diodes 3 is provided on the fourth connection section 562, and the pin 31 of the above-mentioned other of the two diodes 3 is electrically connected to the other of the two connection portions 552.
For example, in the example of fig. 7, a second electrical connection sheet 55 is disposed between a first electrical connection sheet 54 and a third electrical connection sheet 56, the first electrical connection sheet 54 is substantially "7" shaped, a first connection section 541 of the first electrical connection sheet 54 extends left and right, a second connection section 542 extends up and down, a right end of the first connection section 541 is connected to an upper end of the second connection section 542, the second electrical connection sheet 55 is substantially "inverted T" shaped, a left diode 3 is disposed on a left connection portion 552 of the second electrical connection sheet 55, a pin 31 of the left diode 3 is electrically connected to the first connection section 541 of the first electrical connection sheet 54, a shape of the third electrical connection sheet 56 is substantially symmetrical to a shape of the first electrical connection sheet 54, a third connection section 561 of the third electrical connection sheet 56 extends left and right, a fourth connection section 562 extends up and down, a left end of the third connection section 561 is connected to an upper end of the fourth connection section 562, a right diode 3 is disposed on the fourth connection section 562, the pin 31 of the right diode 3 is electrically connected to the right connecting portion 552 of the second electrical connecting piece 55, the land 51 located on the right side of the first hole 52 is disposed on the electrical connecting piece body 551 of the second electrical connecting piece 55, and the two lands 51 on the left and right sides are respectively located on the second connecting section 542 and the fourth connecting section 562. Thus, the first electrical connection tab 54, the second electrical connection tab 55 and the third electrical connection tab 56 thus provided further ensure that the two diodes 3 can be separated from each other while achieving electrical connection of the two diodes 3 and the lead-out wires 211, the two lead-out terminals 42, thereby reducing junction temperature.
In some embodiments of the invention, the photovoltaic module 100 further includes a cover plate disposed on the upper surface of the cell 1111 and a back plate (not shown) disposed on the lower surface of the cell 1111, the back plate having at least one first through hole and at least two second through holes formed thereon, the lead-out wire 211 passing through the first through hole to protrude out of the surface of the back plate, the first through hole having one of a circular shape, an oval shape, an oblong shape and a polygonal shape, each lead-out terminal 42 passing through the second through hole to protrude out of the surface of the back plate, and the second through hole having at least one of a circular shape, an oval shape, an oblong shape and a polygonal shape. Thus, by providing the first and second through holes, the lead-out wire 211 and the lead-out terminal 42 can be electrically connected to the junction box 5 through the first and second through holes, respectively, so as to connect the power generated from the photovoltaic module 100 to an external line, and conduct the current generated from the photovoltaic module 100. In addition, when the first through hole or the second through hole is round, oval or oblong, the stress of the first through hole or the second through hole is relatively dispersed, and the structural strength of the back plate can be ensured; when the first through hole or the second through hole is polygonal, the area of the first through hole or the second through hole is small, so that the transmission rate of water vapor can be reduced, and the service life of the photovoltaic module 100 is prolonged.
Optionally, the first and second perforations are both rectangular in shape (not shown). From this, through making first perforation and the shape of second perforation be the rectangle, first perforation and the fenestrate area of second are less, can reduce the transmissivity of steam to can guarantee photovoltaic module 100's reliability, and improve photovoltaic module 100's life.
Further, four corners of the first through hole and the second through hole are rounded. Therefore, stress concentration can be avoided, and the structural strength of the back plate is ensured.
Or alternatively, the back plate is a glass piece, and the first through hole and the second through hole are both circular in shape. Therefore, the first through hole and the second through hole are both circular in shape, stress of the first through hole and stress of the second through hole are dispersed, and structural strength of the glass piece can be guaranteed.
Alternatively, referring to fig. 2 to 4, an insulator 22 is disposed between the lead bus bar 2 and the cell group 1. In this manner, by providing the insulating member 22, the normal operation of the photovoltaic module 100 can be ensured, and the lead bus bar 2 is prevented from being electrically connected to the cell 1111. The insulating member 22 may be a reflective film.
In some embodiments of the present invention, as shown in fig. 6, two first cell strings 111 and two second cell strings 121 are arranged in parallel, each first cell string 111 and each second cell string 121 include a solder ribbon group 1113, the solder ribbon group 1113 includes a plurality of solder ribbons 11131, the plurality of solder ribbons 11131 are electrically connected to the plurality of cell tabs 1111 in the corresponding first cell string 111 and second cell string 121, the plurality of solder ribbons 11131 extend in a string arrangement direction of the plurality of cell tabs 1111 and are parallel to each other, wherein one end of the lead bus bar 2 is located between the two solder ribbon groups 1113 of the two first cell strings 111 and the other end is located between the two solder ribbon groups 1113 of the two second cell strings 121, and the lead bus bar 2 is arranged at an interval from the two solder ribbon groups 1113 of the two first cell strings 111 and the two solder ribbon groups 1113 of the two second cell strings 121.
Note that the "direction of the plurality of battery pieces 1111 in the serial arrangement" is the vertical direction in fig. 6. For example, in the example of fig. 6, in the same cell group 1, two first cell strings 111 of the first cell unit 11 are arranged in parallel, two second cell strings 121 of the second cell unit 12 are arranged in parallel, each of the first cell strings 111 and each of the second cell strings 121 include a plurality of cell pieces 1111, the plurality of cell pieces 1111 are arranged up and down, the plurality of cell pieces 1111 in each of the first cell strings 111 are electrically connected to the plurality of solder ribbons 11131, and the plurality of cell pieces 1111 in each of the second cell strings 121 are electrically connected to the corresponding plurality of solder ribbons 11131, the plurality of solder ribbons 11131 extend up and down and are parallel to each other, the upper end of the lead bus bar 2 is located between the two solder ribbon groups 1113 of the two first cell strings 111, and the lower end of the lead bus bar 2 is located between the two solder ribbon groups 1113 of the two second cell strings 121, for example, when the distance between the two solder ribbon groups 1113 of the two first cell strings 111 or the two solder ribbon groups 1113 of the two second cell strings 121 is X, the width of the insulating member 22 is less than X so that the lead bus bar 2 is not in contact with both the solder ribbon groups 1113 of the two first battery strings 111 and both the solder ribbon groups 1113 of the two second battery strings 121. From this, through above-mentioned setting, can avoid lead wire busbar 2 and solder strip 11131's stromatolite increase local height, and then the problem of lamination lobe of a leaf has been appeared, has guaranteed photovoltaic module 100's structural strength and structural stability.
In other embodiments of the present invention, as shown in fig. 8, two first battery strings 111 and two second battery strings 121 are arranged in parallel, and the end portions of two adjacent battery pieces 1111 in each first battery string 111 and each second battery string 121 are connected in an overlapping manner by a conductive adhesive 6. For example, in the example of fig. 8, five battery pieces 1111 are shown, the five battery pieces 1111 are arranged in a imbricate manner, and the ends of two adjacent battery pieces 1111 are connected in a lap joint manner. With the arrangement, more battery slices 1111 can be stacked in a unit area, and the power generation power and the stability of the photovoltaic module 100 are improved.
In some alternative embodiments of the present invention, the insulating member 22 includes a first insulating section (not shown) provided between two first cell strings, the first insulating section extending in the string arrangement direction of the plurality of battery pieces 1111 in the first cell string 111, and a second insulating section (not shown) provided between two second cell strings 121, the second insulating section extending in the string arrangement direction of the plurality of battery pieces 1111 in the second cell string 121. It should be noted that "a first insulating section is provided between two first battery strings 111" means that in the same battery cell group 1, the first insulating section is provided between two first battery strings 111; similarly, the phrase "a second insulating segment is provided between two second battery strings 121" means that in the same cell group 1, a second insulating segment is provided between two second battery strings 121. From this, through setting up first insulating section and second insulating section, insulating member 22 is the sectional type structure, makes insulating member 22 and a plurality of battery piece 1111 be connected more easily, can effectively avoid lead wire bus bar 2 and battery piece 1111 to be connected electrically.
Of course, the present invention is not limited thereto, and in other alternative embodiments of the present invention, referring to fig. 2, one end (e.g., the upper end in fig. 2) of the insulating member 22 is located at one end of the first cell string 111 away from the second cell string 121, and the other end (e.g., the lower end in fig. 2) of the insulating member 22 extends to one end of the second cell string 121 away from the first cell string 111 along the string arrangement direction of the plurality of battery sheets 1111 in the same cell group 1. For example, in the example of fig. 2, the string arrangement direction of the plurality of battery sheets 1111 is the up-down direction, the insulating member 22 extends up and down, the upper end of the insulating member 22 is located at the upper end of the first battery string 111, and the lower end of the insulating member 22 extends to the lower end of the second battery string 121. Therefore, the insulating member 22 is of an integrally formed structure, and is simple in structure and convenient to process.
Further, referring to fig. 2, in the same cell group 1, the plurality of battery sheets 1111 of at least one cell group 1 constitute a battery sheet array, the length of the insulating member 22 is greater than the length of the battery sheet array and less than the distance between the first connection point 1112 and the second connection point 1211, and the width of the insulating member 22 is greater than the width of the lead bus bar 2. For example, in the example of fig. 2, the photovoltaic module 100 includes three cell stacks 1, a plurality of battery sheets 1111 in the three cell stacks 1 constitute a battery sheet array, the length of the insulating member 22 is greater than that of the battery sheet array, and the length of the insulating member 22 is less than the distance between the first connection points 1112 of two first battery strings 111 and the second connection points 1211 of two second battery strings 121 in the same cell stack 1. With this arrangement, while the lead bus bar 2 is insulated from the plurality of battery pieces 1111, the lead bus bar 2 can be prevented from being electrically connected to the first connection point 1112 and the second connection section 542.
Other configurations of photovoltaic modules 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (24)
1. A photovoltaic module, comprising:
at least one battery cell stack, the battery cell stack comprising a first battery cell and a second battery cell, the first battery cell and the second battery cell being connected in parallel, the first battery cell comprising two first battery strings, the two first battery strings being connected in series, the second battery cell comprising two second battery strings, the two second battery strings being connected in series, the first battery string and the second battery string each comprising a plurality of battery pieces, the plurality of battery pieces being connected in series,
in the same battery cell group, the first connecting points of the two first battery strings are electrically connected with the second connecting points of the two second battery strings through lead bus bars, each lead bus bar comprises two sub lead bus bars, the first battery string and the second battery string which have a common end point are respectively connected with the same diode through the two sub lead bus bars in a reverse parallel mode, each lead bus bar is provided with a leading-out wire, one end of each leading-out wire is electrically connected with the corresponding lead bus bar, and the other end of each leading-out wire extends towards the direction far away from the plane of the battery piece,
the battery pack is characterized in that a central bus bar is connected between the first battery unit and the second battery unit and comprises at least one partition area, the partition area is located between two public endpoints in the battery pack, the central bus bar is partitioned into a plurality of sub-central bus bars by the partition area, one diode is electrically connected between the end part of each two adjacent sub-central bus bars formed by the partition area and the lead bus bar, the end parts of the two adjacent sub-central bus bars are leading-out ends, the leading-out ends extend towards the direction far away from the plane where the battery piece is located, the leading-out ends of the two adjacent sub-central bus bars are parallel to each other, and each leading-out end is parallel to the leading-out line.
2. The photovoltaic module of claim 1, wherein the lead-out wire and the two lead-out ends are directly opposite each other.
3. The photovoltaic module of claim 1, wherein the outlet wire and the two outlet terminals are arranged offset in a width direction of the center bus bar.
4. A photovoltaic module according to claims 1-3, characterized in that the outlet comprises:
the first leading-out section is electrically connected with the lead bus bar, and the width of the first leading-out section is greater than that of the lead bus bar;
and the second leading-out section is connected with the first leading-out section, and the second leading-out section is perpendicular to the first leading-out section.
5. The photovoltaic module of claim 4, wherein the second lead out section is less distant from one of the two lead out terminals than the other of the two lead out terminals.
6. The assembly defined in any one of claims 1 to 3 wherein each of the terminals is formed by bending a portion of the corresponding central busbar away from the plane of the cell.
7. A photovoltaic module according to claims 1 to 3, wherein the lead-out wires and adjacent ones of the two lead-out terminals are spaced apart by a distance of at least 2 mm.
8. The photovoltaic module of any of claims 1-3, further comprising:
the battery pack comprises a junction box, wherein three bonding pads are arranged in the junction box, the outgoing line and the two outgoing ends are respectively electrically connected with the three bonding pads, and two diodes corresponding to the same battery cell group are arranged in the junction box.
9. The assembly according to claim 8, wherein the junction box has a first hole and two second holes formed thereon, the two second holes are respectively located at two sides of the first hole, the lead wire passes through the first hole and is electrically connected to one of the three pads, and the two lead terminals pass through the two second holes and are electrically connected to the other two of the three pads.
10. The assembly according to claim 9, wherein the one of the three pads is located on one side of the first hole, the two second holes are respectively located on the other two sides of the first hole opposite to each other, and the other two of the three pads are respectively located on one side of the corresponding second hole away from the center of the first hole.
11. The assembly according to claim 8, wherein three of the pads are collectively disposed, and two of the diodes are disposed on either side of the three pads.
12. The photovoltaic module of claim 9, wherein a first electrical connection pad, a second electrical connection pad, and a third electrical connection pad are disposed in the junction box, one of the two diodes is electrically connected to the first electrical connection pad and the second electrical connection pad, and the other of the two diodes is electrically connected to the second electrical connection pad and the third electrical connection pad.
13. The photovoltaic module of claim 12, wherein said one of the three pads is disposed on the second electrical connection pad and said other two of the three pads are disposed on the first and third electrical connection pads, respectively.
14. The photovoltaic module of claim 13, wherein the first electrical connection tab includes a first connection section and a second connection section connected to each other, the first connection section extending in a length direction of the junction box and the second connection section extending in a width direction of the junction box,
the second electric connecting sheet is arranged between the first electric connecting sheet and the third electric connecting sheet, the second electric connecting sheet comprises an electric connecting sheet body and two connecting parts, the two connecting parts are respectively connected with the two sides of the electric connecting sheet body, one of the three welding pads is arranged on the electric connecting sheet body,
the third electric connection sheet comprises a third connection section and a fourth connection section, the third connection section extends along the length direction of the junction box, the fourth connection section extends along the width direction of the junction box, the other two of the three welding pads are respectively arranged on the second connection section and the fourth connection section,
the one of the two diodes is provided on one of the two connection portions, the pin of the one of the two diodes is electrically connected to the first connection section, the other of the two diodes is provided on the fourth connection section, and the pin of the other of the two diodes is electrically connected to the other of the two connection portions.
15. The photovoltaic module according to any one of claims 1 to 3, further comprising a cover plate provided on the upper surface of the cell sheet and a back plate provided on the lower surface of the cell sheet, the back plate having at least one first perforation and at least two second perforations formed thereon,
the lead-out wire passes through the first through hole to protrude out of the surface of the back plate, the first through hole has one of a circular shape, an elliptical shape, an oblong shape, and a polygonal shape,
each of the lead-out terminals passes through the second through hole to protrude out of the surface of the back plate, and the second through hole has a shape of at least one of a circle, an ellipse, an oblong, and a polygon.
16. The photovoltaic module of claim 15, wherein the first and second perforations are each rectangular in shape.
17. The photovoltaic module of claim 16, wherein the first and second perforations are rounded at four corners.
18. The photovoltaic module of claim 15 wherein the backsheet is a glass piece and the first and second perforations are each circular in shape.
19. The photovoltaic module according to claim 1, wherein two of the first cell strings and two of the second cell strings are arranged in parallel, each of the first cell strings and each of the second cell strings includes a solder ribbon group, the solder ribbon group includes a plurality of solder ribbons, the plurality of solder ribbons are electrically connected to the plurality of cell pieces in the corresponding first cell strings and second cell strings, the plurality of solder ribbons extend in a string arrangement direction of the plurality of cell pieces and are parallel to each other,
wherein one end of the lead bus bar is positioned between two of the solder ribbon groups of the two first battery strings, the other end of the lead bus bar is positioned between two of the solder ribbon groups of the two second battery strings, and the lead bus bar is arranged at intervals with the two of the solder ribbon groups of the two first battery strings and the two of the solder ribbon groups of the two second battery strings.
20. The photovoltaic module according to claim 1, wherein the two first cell strings and the two second cell strings are arranged in parallel, and the end portions of two adjacent cell pieces in each first cell string and each second cell string are connected in a lap joint mode through conductive adhesive.
21. The photovoltaic module of claim 1, wherein an insulator is disposed between the lead bus bar and the cell stack.
22. The photovoltaic module according to claim 21, wherein the insulating member includes a first insulating section provided between two of the first cell strings, the first insulating section extending in a string arrangement direction of the plurality of the cells in the first cell string, and a second insulating section provided between two of the second cell strings, the second insulating section extending in a string arrangement direction of the plurality of the cells in the second cell string.
23. The pv module according to claim 21 wherein one end of the insulator is located at an end of the first cell string remote from the second cell string, and another end of the insulator extends along a string arrangement direction of the plurality of cells in the same cell group to an end of the second cell string remote from the first cell string.
24. The assembly according to claim 23, wherein a plurality of the cells in at least one of the cell stacks form an array of cells, the insulator has a length greater than a length of the array of cells and less than a distance between the first and second connection points, and a width greater than a width of the lead bus bar.
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| CN201911228965.5A Active CN112542527B (en) | 2019-09-18 | 2019-12-04 | Photovoltaic module and preparation method thereof |
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| CN201911228965.5A Active CN112542527B (en) | 2019-09-18 | 2019-12-04 | Photovoltaic module and preparation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN115985988A (en) | 2023-04-18 |
| CN110473934A (en) | 2019-11-19 |
| CN211480060U (en) | 2020-09-11 |
| CN112542527B (en) | 2022-12-06 |
| CN112542528B (en) | 2022-08-02 |
| CN112542527A (en) | 2021-03-23 |
| CN112531058B (en) | 2022-09-02 |
| CN210926041U (en) | 2020-07-03 |
| CN211480059U (en) | 2020-09-11 |
| CN112542528A (en) | 2021-03-23 |
| CN211480057U (en) | 2020-09-11 |
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