CN114156352B - Battery plate and photovoltaic module - Google Patents
Battery plate and photovoltaic module Download PDFInfo
- Publication number
- CN114156352B CN114156352B CN202010827533.2A CN202010827533A CN114156352B CN 114156352 B CN114156352 B CN 114156352B CN 202010827533 A CN202010827533 A CN 202010827533A CN 114156352 B CN114156352 B CN 114156352B
- Authority
- CN
- China
- Prior art keywords
- battery
- piece
- pieces
- battery piece
- grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 claims description 23
- 239000002313 adhesive film Substances 0.000 claims description 16
- 238000004806 packaging method and process Methods 0.000 claims description 16
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000012634 fragment Substances 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 description 23
- 238000004519 manufacturing process Methods 0.000 description 17
- 239000000853 adhesive Substances 0.000 description 14
- 230000001070 adhesive effect Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006124 polyolefin elastomer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- 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
- H01L31/0248—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 characterised by their semiconductor bodies
- H01L31/0352—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 characterised by their semiconductor bodies characterised by their shape or by the shapes, relative sizes or disposition of the semiconductor regions
- H01L31/035272—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 characterised by their semiconductor bodies characterised by their shape or by the shapes, relative sizes or disposition of the semiconductor regions characterised by at least one potential jump barrier or surface barrier
- H01L31/035281—Shape of the body
-
- 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
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022433—Particular geometry of the grid contacts
-
- 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
- H01L31/043—Mechanically stacked PV cells
-
- 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
- H01L31/048—Encapsulation of modules
-
- 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
- H01L31/0508—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 the interconnection means having a particular shape
-
- 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
Abstract
The invention discloses a battery plate and a photovoltaic module, and belongs to the technical field of solar energy. The battery plate comprises a plurality of battery strings connected in series or in parallel; the battery string comprises a plurality of first battery pieces positioned at the end parts and a plurality of second battery pieces positioned at the middle parts; the first battery piece and the second battery piece are isosceles right triangle battery pieces, and the length of the bevel edge of the first battery piece is larger than that of the bevel edge of the second battery piece; in the first direction, the right-angle sides of every two adjacent second battery pieces are electrically connected, the right-angle sides of the first battery piece are electrically connected with the right-angle sides of the second battery pieces, and in the second direction, the hypotenuses of every two adjacent second battery pieces are aligned. Therefore, on one hand, the battery piece fragments generated when the square battery piece is cut can be reduced, and the utilization rate of the battery piece is further improved. On the other hand, the series voltage of the battery pieces after being connected in series is higher than the maximum voltage allowed by PN junctions of the battery pieces, and further the occurrence of safety accidents such as breakdown, short circuit and the like of the battery pieces can be avoided.
Description
Technical Field
The invention belongs to the technical field of solar energy, and particularly relates to a battery plate and a photovoltaic module.
Background
Solar energy has received increasing attention in recent years as an environmentally friendly renewable energy source. The solar panel is used as a core component for generating solar energy, and the quality of the solar panel directly influences the power generation performance of the solar energy.
Currently, solar panels comprise a plurality of strings, typically 10 strings each, with 5 strings each comprising 34 strip-shaped cells connected together in parallel. In one possible implementation manner, each strip-shaped battery piece can be cut into 1/2 piece or 1/3 piece from the square battery piece, but each piece of battery piece needs to be connected through welding, which is further unfavorable for the production automation. Based on this, in order to reduce the number of use of the solder strips and reduce the production cost of the battery string, in another possible implementation, the square battery pieces may be cut into 1/5 pieces or 1/6 pieces. In this way, in the process of forming the battery strings by the series welding of the battery pieces, the bus bar serving as a conducting wire can be welded at both ends of each battery string, and then the bypass diode is connected through one penetrating bus bar, so that the connection of the battery strings can be completed.
However, in the process of implementing the present invention, the inventors found that at least the following problems exist in the prior art: on the one hand, although the number of welding strips is reduced, as the number of times of cutting the battery piece is increased, the battery piece fragments are easily caused, and the utilization rate of the battery piece is further reduced; on the other hand, as the battery strings comprise more battery pieces, the series voltage is close to or even exceeds the maximum voltage allowed by PN junctions of the battery pieces, so that the battery pieces break down, short circuit and even heat are generated and burnt, and the safety of the battery plate is reduced.
Disclosure of Invention
The invention aims to provide a battery plate and a photovoltaic module, which can solve the problems of low utilization rate of battery pieces and insufficient safety of the battery pieces.
In order to solve the technical problems, the invention is realized as follows:
in a first aspect, the present invention provides a panel comprising a plurality of series or parallel strings of cells;
the battery string comprises a first battery piece positioned at the end part and a second battery piece positioned at the middle part; the first battery piece and the second battery piece are isosceles right triangle battery pieces, and the length of the bevel edge of the first battery piece is larger than that of the bevel edge of the second battery piece;
in a first direction, the right-angle sides of every two adjacent second battery pieces are electrically connected, the right-angle sides of the first battery pieces are electrically connected with the right-angle sides of the second battery pieces, in a second direction, the oblique sides of every two adjacent second battery pieces are aligned, and the first direction and the second direction are two intersecting directions;
at least one first battery piece is arranged at the first end of the battery string, and at least two first battery pieces are arranged at the second end of the battery string;
the straight line where the bevel edge of the first battery piece is located at the first end is intersected with the straight line where the bevel edge of the second battery piece is located, the bevel edge of one first battery piece and the bevel edge of the second battery piece are located at the second end in the same direction, and the straight line where the bevel edge of the other first battery piece is located at the second end is intersected with the straight line where the bevel edge of the second battery piece is located.
Optionally, the number m of the first battery pieces and the number n of the second battery pieces included in the battery string satisfy:
m=3, n=2x+1, where x is 0.
Optionally, the first battery piece comprises a first main grid and a first auxiliary grid, and the second battery piece comprises a second main grid and a second auxiliary grid;
the first main grid is arranged on the right-angle side and the inclined side of the first battery piece, and two ends of the first auxiliary grid are respectively perpendicular to the two right-angle sides of the first battery piece;
the second main grid is arranged on the right-angle side of the second battery piece, and two ends of the second auxiliary grid are respectively perpendicular to the two right-angle sides of the second battery piece.
Optionally, the width D of the first main gate 1 Width D of the second main grid 2 The method meets the following conditions:
0.2mm≤D 1 ≤3mm，0.2mm≤D 2 ≤3mm；
width D of the first sub-grid 3 Width D of the second auxiliary gate 4 The method meets the following conditions:
0.01mm≤D 3 ≤0.05mm，0.01mm≤D 4 ≤0.05mm。
optionally, the first main gate and the second main gate are respectively independent solid main gate or hollow main gate, wherein the hollow main gate is in any one of sectional hollow, triangular hollow and diamond hollow.
Optionally, the length L of the hypotenuse of the first battery piece 1 And the incline of the second battery pieceLength L of edge 2 The relationship between them satisfies:
0＜L 1 -L 2 ≤15mm；
and the length L of the bevel edge of the first battery piece 1 The method meets the following conditions: l is 150mm or less 1 ≤210mm。
Optionally, in the first direction, the right-angle sides of every two adjacent second battery pieces are lapped by conductive adhesive, and the right-angle sides of the first battery pieces and the right-angle sides of the second battery pieces are lapped by conductive adhesive.
Optionally, the bottom angle of the first battery piece and the bottom angle of each second battery piece are chamfer angles.
Optionally, the first battery pieces located at the second end of the battery string are connected in an insulating manner.
In a second aspect, the present invention also provides a photovoltaic module comprising a panel according to any one of the first aspects.
Optionally, the photovoltaic module further includes a front cover plate, a rear cover plate, a first packaging adhesive film and a second packaging adhesive film;
the front cover plate is adhered to the light receiving surface of the battery plate through the first packaging adhesive film, and the rear cover plate is adhered to the backlight surface of the battery plate through the first packaging adhesive film.
In the battery plate provided by the invention, the battery plate comprises a plurality of battery strings connected in series or in parallel, and the battery strings comprise the first battery piece positioned at the end part and the second battery piece positioned at the middle part, and the first battery piece and the second battery piece are isosceles right triangle battery pieces, so that the battery strings with the same light receiving area have fewer battery pieces, the number of the battery pieces needed by the battery strings arranged by the battery pieces with the same shape can be reduced, the series voltage can be further reduced, the maximum voltage allowed by PN junctions of the battery pieces with the series voltage can be further avoided, and further, the occurrence of safety accidents such as breakdown, short circuit, heating and burning of the battery pieces can be further avoided, and the safety performance of the battery strings formed by the first battery piece and the second battery piece is higher. And first battery piece and second battery piece are by square battery piece along the diagonal cutting form, and then make a square battery piece can cut into 4 first battery pieces or 4 second battery pieces, consequently, square battery piece only need pass through twice when cutting can, like this, can reduce the battery piece of square battery piece production when cutting, and then improved the utilization ratio of battery piece.
In the photovoltaic module provided by the invention, the photovoltaic module comprises the battery plates, and the battery plates are only required to be electrically connected when the photovoltaic module is typeset, so that the manufacturing of the photovoltaic module can be fully automated in an automatic printing and automatic laying mode, the problem of automation of the existing photovoltaic module manufacturing process is avoided, the production efficiency of the photovoltaic module is improved, and the production capacity of the photovoltaic module is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a conventional solar cell panel;
fig. 2 is a schematic structural diagram of a battery panel according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a battery string according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of the present FIG. 3 in the direction E-E;
FIG. 5 is a schematic view of the positions of a first main gate and a first sub-gate according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the positions of a second primary gate and a second secondary gate provided by an embodiment of the present invention;
fig. 7 is a schematic view illustrating the position of a cutting area in a first battery sheet according to an embodiment of the present invention;
fig. 8 is a schematic cross-sectional view of a photovoltaic module provided by an embodiment of the present invention;
FIG. 9 is a schematic diagram of the positions of the lead-out wires according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a light receiving surface of a photovoltaic module according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a backlight surface of a photovoltaic module according to an embodiment of the present invention;
fig. 12 is a schematic diagram of connection of bus bars according to an embodiment of the present invention.
Reference numerals
1-a battery plate; 2-a front cover plate; 3-a back cover plate; 4-a first packaging adhesive film; 5-a second packaging adhesive film; 6-outgoing lines; 7-bus bars; 8-frame; 9-junction box; 11-battery strings; 71-a first bus bar; 72-a second bus bar; 111-a first battery piece; 112-a second battery piece; 113-conductive adhesive; 1111—a first primary gate; 1112-a first sub-gate; 1113-cutting region; 1121-a second main gate; 1122-second auxiliary gate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the invention may be practiced otherwise than as specifically illustrated or described herein. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
Before describing the embodiments of the present invention in detail, the existing production process of the battery panel and the technical problems that occur will be described first.
A solar cell panel composed of a large-sized strip-shaped cell 101 will be described below as an example. Fig. 1 shows a schematic structure of a conventional solar cell panel, and referring to fig. 1, the solar cell panel includes 10 cell strings, each of which includes 34 strip-shaped cell sheets 101, connected in parallel with each of 5 cell strings.
Each of the strip-shaped battery pieces 101 is formed by cutting 1/5 or 1/6 of a square battery piece, and exemplary, the strip-shaped battery pieces with the length of 156.75mm and the width of 31.35mm can be divided into strip-shaped battery pieces with the side length of 156.75mm by bisecting, so that the generation of battery piece fragments is easy to cause, and the utilization rate of the battery pieces is reduced.
Every 34 bar battery pieces 101 can be through the series connection of conductive adhesive forming battery string, and the both ends need welded bus bar be as the wire, and the both ends welding of every battery string has the bus bar to use as the wire, and the bus bar need bend the processing at the process of laying, and then increases the light receiving proportion of solar cell panel's light receiving face, is provided with insulating gasket between the back light face of bus bar and battery piece after bending, and then avoids battery positive and negative pole lug connection, causes the short circuit of circuit. A penetrating bus strap is needed between every two solar panels to connect the bypass diode, so that the influence of hot spots is reduced.
However, because the bus bar needs to be bent in the laying process, an insulating gasket is arranged between the bent bus bar and the backlight surface of the battery piece, so that the battery piece is very easy to press in the process of installing the bus bar and the insulating gasket in the production process of the solar panel, the battery piece is cracked, and the yield of the whole assembly is reduced. Each strip-shaped battery piece 101 in each battery is formed by cutting 1/5 piece or 1/6 piece of square battery piece, so that the generation of battery piece fragments is easy to cause, and the utilization rate of the battery pieces is reduced; under the same light receiving area, the battery string comprises a large number of battery pieces, so that the series voltage is close to or even exceeds the maximum voltage (between 12 and 16V) allowed by the PN junction of the battery pieces, and the battery pieces break down, short circuit and even heat burning out are caused. Meanwhile, since a large number of bus bars (bus bars welded at two ends of each battery string and bus bars penetrating between every two solar panels) are used in the process of producing the battery pieces, the process of assembling the bus bars may not be completed by adopting one set of machinery, so that the difficulty of full automation of the solar panels is increased, and the production efficiency of the solar panels is reduced.
In summary, aiming at the existing solar panel, the battery piece and the photovoltaic module in the embodiment of the invention are provided to solve the problems of low utilization rate of the existing battery piece, insufficient safety of the battery piece and low production automation degree of the panel.
The battery board and the photovoltaic module provided by the embodiment of the invention are described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.
Fig. 2 is a schematic structural diagram of a battery board according to an embodiment of the present invention, where the battery board includes a plurality of battery strings 11 connected in series or in parallel; the battery string 11 includes a first battery cell 111 at an end portion and a second battery cell 112 at a middle portion; the first battery piece 111 and the second battery piece 112 are isosceles right triangle battery pieces, and the length of the bevel edge of the first battery piece 111 is larger than that of the bevel edge of the second battery piece 112; in the first direction, the right-angle sides of every two adjacent second battery pieces 112 are electrically connected, the right-angle sides of the first battery piece 111 are electrically connected with the right-angle sides of the second battery pieces 112, in the second direction, the oblique sides of every two adjacent second battery pieces 112 are aligned, and the first direction and the second direction are two intersecting directions; at least one first battery piece 111 is arranged at the first end of the battery string 11, and at least two first battery pieces 111 are arranged at the second end of the battery string 11; wherein, the straight line where the oblique side of the first battery piece 111 located at the first end is located intersects the straight line where the oblique side of the second battery piece 112 is located, the oblique side of one first battery piece 111 located at the second end and the oblique side of the second battery piece 112 located at the second end are located in the same direction, and the straight line where the oblique side of the other first battery piece 111 is located intersects the straight line where the oblique side of the second battery piece 111 is located.
The first battery piece 111 may be formed by a square battery piece as shown in fig. 5 through a laser cutting technology, and may be cut along a diagonal line of the square battery piece in a cutting process, and equally divided into 4 isosceles right triangle battery pieces. Similarly, the second battery piece 112 may be formed by a square battery piece as shown in fig. 6 through a laser cutting technology, which is not described herein.
It should be noted that, since the first battery piece 111 and the second battery piece 112 are formed by cutting square battery pieces along diagonal lines, and thus one square battery piece can be cut into 4 first battery pieces 111 or 4 second battery pieces 112, the square battery pieces only need to be cut twice when being cut, so that battery piece fragments generated when the square battery pieces are cut can be reduced, and the utilization rate of the battery pieces is improved.
The battery strings 11 of different models may be arranged by different numbers of the first and second battery cells 111 and 112.
Optionally, the number of the first battery pieces 111 and the number of the second battery pieces 112 included in the battery string 11 satisfies the following number: m=3, n=2x+1, where x is 0. In the embodiment of the present invention, when x is equal to 8 as shown in fig. 3, the number m of the first battery pieces 111 is 3, and the number n of the second battery pieces 112 is 17. Specifically, 3 first battery cells 111 are located at the end portions of the battery string 11, and 17 second battery cells 112 are located at the middle portion of the battery string 11. In the first direction, the right-angle sides of each two adjacent second battery pieces 112 may be electrically connected in a lap joint manner, and the right-angle sides of the first battery piece 111 and the second battery piece 112 may also be electrically connected in a lap joint manner. It should be noted that, since the positive electrode and the negative electrode of the battery sheet are located on two opposite surfaces of the battery sheet, by electrically connecting the battery sheets in a lap joint manner, a plurality of battery sheets can be connected in series. The first direction is the same as the direction shown by X in fig. 3, and the second direction is the same as the direction shown by Y in fig. 3.
As shown in fig. 3, the straight line where the oblique edge of the first battery piece A1 located at the first end is located and the straight line where the oblique edge of the second battery piece 112 is located intersect, and the oblique edge of one first battery piece A3 located at the second end and the oblique edge of the second battery piece 112 are located in the same direction, both being in the X direction, wherein the oblique edge of the first battery piece A3 and the oblique edge of the second battery piece B16 are parallel, the oblique edge of the first battery piece A3 and the oblique edge of the second battery piece B14 are parallel, the oblique edge of A3 is connected with the A3 battery piece of the next battery string 11, and the straight line where the oblique edge of the other first battery piece A2 is located and the straight line where the oblique edge of the second battery piece 112 is located intersect. As shown in fig. 2, taking the example that the battery board includes 12 battery strings 11, six battery strings 11 on one side and six battery strings 11 on the other side are arranged in mirror symmetry. In this way, two first battery pieces A2 included in two adjacent battery strings 11 arranged in mirror symmetry can be connected to the bus bar 7 between the two battery boards 1, and thus the current can be led out. As shown in fig. 3, the current of the battery string 11 may flow from A2 to A1 via B17, B15, B13, B11, B9, B7, B5, B3, B1 to A1, from A1 to A3 via B2, B4, B6, B8, B10, B12, B14, B16 to A3, and from the oblique side of A3 to the next adjacent battery string 11. In addition, the first battery pieces A3 included in the battery strings 11 in the first row and the first battery pieces A3 included in the battery strings 11 in the second row on the same side are connected through conductive adhesive or conductive adhesive tape, the first battery pieces A2 included in the battery strings 11 in the second row and the first battery pieces A2 included in the battery strings 11 in the third row on the same side are connected through bus bars, and the battery strings 11 in other rows are consistent with the connection mode, which is not repeated in the present invention. In this way, a series connection between two adjacent rows of battery strings 11 located in the vertical direction on the same side can be achieved. It should be noted that, in the embodiment of the present application, two battery strings 11 adjacent to each other in the vertical direction of the battery board are connected in series to form a sub-circuit board, for example, every six battery strings 11 are connected in series in the vertical direction, and then are connected in parallel with a sub-battery board formed by six battery strings adjacent to each other in the horizontal direction, where the horizontal direction is consistent with the direction indicated by P in fig. 2, and the vertical direction is consistent with the direction indicated by Q in fig. 2. Under the condition of unchanged voltage, the current of the whole battery plate can be doubled by connecting the sub-battery plates formed by a plurality of adjacent battery strings 11 in parallel in the horizontal direction of the battery plate, and the power supply efficiency of the battery plate is further improved.
Alternatively, the first battery cells 111 at the second end of the battery string 11 are connected in an insulating manner.
Specifically, taking the first battery cell 111 and the second battery cell 112 in fig. 3 as an example, since the current of the battery string 11 goes from A2 to A1 via B17, B15, B13, B11, B9, B7, B5, B3, B1 to A1, and from A1 to B2, B4, B6, B8, B10, B12, B14, B16 to A3, if the current loop direction is to be changed by the first battery cell A1 and the first battery cell A2, the first battery cell A2 and the first battery cell A3 in the same string may be subjected to an insulation process, for example, an insulation material such as an insulation high-temperature adhesive tape is used to insulate the first battery cell A2 and the first battery cell A3, so that the first battery cell A2 and the first battery cell A3 are not conductive. The first battery pieces 111 located at the second end of each battery string 11 can be isolated by high-temperature adhesive tape to achieve the above effect, which is not described in detail herein.
Alternatively, as shown in fig. 4, in the first direction, the right-angle sides of each two adjacent second battery cells 112 are electrically connected by bonding with the conductive adhesive 113, and the right-angle sides of the first battery cell 111 and the second battery cell 112 are electrically connected by the conductive adhesive 113. The conductive adhesive 113 can be a conductive adhesive 113 formed by adding silver powder/silver-coated copper powder into an organosilicon system, adding silver powder or silver-coated copper particles into an acrylic adhesive system, or can also replace the conductive adhesive 113 by a conductive adhesive tape.
Since the first cell 111 and the second cell 112 are isosceles right triangles, if each of the strip-shaped cells 101 shown in fig. 1 is formed by cutting 1/5 or 1/6 of square cells, the number of cells 11 in the cell string 11 having the same light receiving area is small if the number of cells 11 arranged by using isosceles triangle-shaped cells is small as shown in fig. 2. Specifically, taking the battery string 11 with the length of 783.75mm and the width of 162.5mm as an example, 25 battery pieces are required to be connected in series by adopting the strip-shaped battery pieces, and the second battery piece 112 with the inclined edge of 156.75mm and the first battery piece 111 with the inclined edge of 162.5mm are required to be connected in series by adopting the 17 second battery pieces 112 and 3 first battery pieces 111, so that the number of the battery pieces connected in series by each battery string 11 is reduced, the serial voltage can be reduced, the maximum voltage (12V-16V) allowed by PN junctions of the battery pieces with the serial voltage can be avoided, and further, the occurrence of safety accidents such as breakdown, short circuit, even heating and burning of the battery pieces can be avoided, and the safety performance of the battery string 11 formed by the first battery piece 111 and the second battery piece 112 is higher.
Further, as shown in fig. 5 and 6, each first battery sheet 111 includes a first main grid 1111 and a plurality of first sub-grids 1112 thereon, and each second battery sheet 112 includes a second main grid 1121 and a second sub-grid 1122 thereon; the first main grid 1111 is disposed on the right-angle side and the oblique side of the first battery piece 111, and both ends of the first sub-grid 1112 are respectively perpendicular to the two right-angle sides of the first battery piece 111; the second main grid 1121 is disposed on the right-angle sides of the second battery cell 112, and two ends of the second sub-grid 1122 are perpendicular to the two right-angle sides of the second battery cell 112, respectively.
Specifically, the first main grids 1111 are disposed on the right-angle sides and the oblique sides of the first battery piece 111, as shown in fig. 7, the first main grids 1111 may be printed on the four sides of the front and the back sides and the positions where the diagonal lines are located of the square battery pieces forming the first battery piece 111, as shown in fig. 5, the ends of the first main grids 1111 are not communicated, and a cutting area 1113 is left at the diagonal position, the first main grids 1111 are not disposed in the cutting area 1113, and the first main grids 1111 are disposed on both sides of the cutting area 1113, so that the right-angle sides of each first battery piece 111 have the first main grids 1111 after cutting along the diagonal lines of the square battery pieces. It should be noted that, as shown in fig. 7, the widths of the first main grids 1111 disposed on both sides of the cutting region 1113 may be different, and the first main grids 1111 with wider widths and the first main grids 111 with narrower widths may be disposed on both sides of the cutting region 1113, so that after the cutting is completed, two right-angle sides of each first battery piece 111 have a wider first main grid 111 and a narrower first main grid 111 respectively. The second main grids 1121 are disposed on right-angle sides of the second battery cells 112, so that the second main grids 1121 may be printed at positions where diagonal lines of the front and back sides of the square battery cells forming the second battery cells 112 are located, and similarly, a cutting area may be left at the diagonal line positions, so that the first right-angle side of each second battery cell 112 has a wider second main grid 1121, which is not described in detail in the present invention. The width of the cutting area may be between 0.2mm and 1mm, and the width of the cutting area is determined according to the cutting process, which is not limited in the embodiment of the present invention.
Further, since one right-angle side of each first battery piece 111 has a wider first main grid 1111 and the first right-angle side of each second battery piece 112 has a wider second main grid 1121, each two adjacent first battery pieces 111 or each two adjacent second battery pieces 112 can be mutually matched. The second battery cell B13 and the second battery cell B15 adjacent to each other in fig. 3 are described as an example. Because the second battery piece B13 and the second battery piece B15 are provided with the wider second main grid 1121, the wider second main grid 1121 of the second battery piece B13 and the wider second main grid 1121 of the second battery piece B15 can be electrically connected on the backlight surface during assembly, so that the second main grid 1121 in the lap joint area of every two adjacent second battery pieces 112 is wider, and the resistance of the second battery pieces 1121 after being integrally connected in series is reduced; meanwhile, since the second main grid 1121 with the narrower second main grid 1121 is located on the light receiving surface, compared with the arrangement of the second main grid 1121 with the wider second main grid 1121 on the light receiving surface, the shielding area for light is smaller, which is beneficial to increasing the light absorption efficiency.
As shown in fig. 5 and 6, the first auxiliary grid 1112 is disposed on the light receiving surface of the first battery piece 111, and the first auxiliary grid 1112 includes a plurality of grid lines disposed in a bending manner, each of the first auxiliary grids 1112 disposed in a bending manner includes two grid lines perpendicular to each other, and an end of each of the grid lines is perpendicular to one right-angle side of the first battery piece 111, so that two right-angle sides of each of the first battery pieces 111 can be perpendicular to two ends of the first auxiliary grid 1112. The width of the first sub-gate 1112 is smaller than the first main gate 1111. Similarly, the second sub-grid 1122 is disposed on the light receiving surface of the second battery plate 112, and the second sub-grid 1122 includes a plurality of grid lines disposed in a bending manner, each of the second sub-grids 1112 disposed in a bending manner includes two grid lines perpendicular to each other, and an end of each of the grid lines is perpendicular to one right-angle side of one of the second battery plates 112, so that two right-angle sides of each of the second battery plates 112 can be perpendicular to two ends of the second sub-grid 1122. The second sub-gate 1122 has a width smaller than the second main gate 1121.
Note that the width D of the first main gate 1111 1 Width D of second main gate 1121 2 Can satisfy the following conditions: d is more than or equal to 0.2mm 1 ≤3mm，0.2mm≤D 2 Less than or equal to 3mm, wherein the width D of the first main grid 1111 1 May be equal to the width D of the second main gate 1121 2 Width D of the first main gate 1111 1 And a width D of the second main gate 1121 2 All 1mm, width D of first main gate 1111 1 And a width D of the second main gate 1121 2 May also be unequal, e.g. width D of first main gate 1111 1 Width D of the second main gate 1121 is 1.5mm 2 1mm, the present embodiment is not limited thereto. In addition, the width D of the first sub-gate 1112 3 Width D of second sub-gate 1122 4 Can satisfy the following conditions: d is more than or equal to 0.01mm 3 ≤0.05mm，0.01mm≤D 4 Less than or equal to 0.05mm. Similarly, the width of the first sub-gate 1112 and the width of the second sub-gate 1122 may be equal or different, and the present invention is not limited thereto.
It should be further noted that, the first main gate 1111 and the second main gate 1121 are each independently a solid main gate or a hollowed main gate, where the hollowed main gate may be any of a sectional hollowed, a triangular hollowed, and a diamond hollowed. The first main grating 1111 and the second main grating 1121 may have different specifications. In this way, since the grid type of the first main grid 1111 and the grid type of the second main grid 1121 are various, the width of the first main grid 1111 and the width of the second main grid 1121 are various, and the width of the first auxiliary grid 1112 and the width of the second auxiliary grid 1122 are various, the specifications of the first battery piece 111 and the second battery piece 112 can be various, and the selection of the battery plate is enriched, and when the battery plate is manufactured, an optimized selection of the battery plate 1 can be selected based on the collection requirement of the current carrier of the battery plate and the shielding condition of sunlight, so that the application scene of the battery plate 1 is not limited.
Further, the first main gate 1111, the second main gate 1121, the first sub-gate 1112 and the second sub-gate 1122 are all used for collecting carriers generated by the battery, and in the case that the first main gate 1111 is located on the right-angle side and the oblique side of the first battery 111, the first battery 111 can be used as a node battery of the series circuit, and has the following functions: 1. the power generation function of the battery plate 1 is born; 2. as shown in fig. 3, the oblique sides of the first battery cell A1, the oblique sides of the first battery cell A2 and the oblique sides of the second battery cell 112 are perpendicular, so that the first battery cell A1, the first sub-gate 1112 in the first battery cell A2 and the second sub-gate 1122 in the second battery cell 112 are conducted, and the current of the battery string 11 may be drawn from A2 via B17, B15, B13, B11, B9, B7, B5, B3, B1 to A1, and from A1 via B2, B4, B6, B8, B10, B12, B14, B16 to A3, then, the oblique sides of the battery strings A3 flow to the adjacent battery strings 11 in the vertical direction on the same side, the first battery pieces A3 included in the battery strings 11 in the first row on the same side and the first battery pieces A3 included in the battery strings 11 in the second row on the same side are connected through conductive adhesive or conductive adhesive tapes, the first battery pieces A2 included in the battery strings 11 in the second row on the same side and the first battery pieces A2 included in the battery strings 11 in the third row are connected through bus bars, and the like, so that the series connection of a plurality of battery strings on the same side is realized, and therefore, the first battery pieces A1 and A2 can be used for changing the current loop direction; 3. two first battery pieces A2 included in two adjacent battery strings 11 arranged in mirror symmetry can be connected with the bus bar 7 between the two battery boards 1, and then current can be led out. 4. The oblique sides of the first battery pieces A3 may be connected with the oblique sides of the first battery pieces A3 of the adjacent battery strings 11, so as to realize the series connection of the two battery strings. In addition, since the first battery pieces 111 and the second battery pieces 112 realize current guidance through the first main grid 1111 and the second main grid 1121, and the adjacent two second battery pieces 112 directly realize current guidance through the second main grid 1121, the battery pieces do not need to be connected by using the bus bar 7 or the welding strip, and only need to be electrically connected with each other when the battery strings 11 are typeset, so that the typesetting of the battery plates 1 becomes simpler and more convenient, and the automatic production of the battery plates 1 is facilitated to be improved.
In addition, since every adjacent twoThe battery strings 11 are connected in series by the first battery piece A3, and therefore, the length L of the oblique side of the first battery piece 111 1 Length L greater than the hypotenuse of second battery tab 112 2 In this way, when the effective series connection between the two adjacent battery strings 11 is ensured, the contact between the second battery pieces included in the two adjacent battery strings 11 can be avoided, and then the overlapping area of the connection between the two adjacent battery strings 11 is reduced, and the risk of short circuit between the battery strings 11 is reduced.
Based on this, the length L of the hypotenuse of the first battery piece 111 1 And length L of hypotenuse of second battery piece 112 2 The relationship between them may be as follows: 0 < L 1 -L 2 Is less than or equal to 15mm. And length L of hypotenuse of first battery piece 111 1 The method meets the following conditions: l is 150mm or less 1 And the thickness is less than or equal to 210mm. Exemplary, length L of hypotenuse of first cell 111 1 Can be 156.0+ -0.25 mm, 156.5+ -0.25 mm, 156.75+ -0.25 mm, 157.0+ -0.25 mm, etc. Optionally, the bottom angle of each first battery piece 111 and the bottom angle of each second battery piece 112 are chamfer angles, so that the bottom angle of the first battery piece 111 and the bottom angle of the second battery piece 112 cannot be worn during typesetting of the battery board 1, and the yield of the production of the battery board 1 can be improved.
Further, the length L of the hypotenuse of the first cell 111 1 And length L of hypotenuse of second battery piece 112 2 The relationship between them may be as follows: L1-L2 is 4mm or less and 8mm or less, so that the length L1 of the bevel edge of the first battery piece 111 and the length L of the bevel edge of the second battery piece 112 are equal to or less 2 The difference between the first and second battery plates 111 and 112 is reduced, and the splicing between the first and second battery plates 111 and 112 is facilitated.
Further, the first cell 111 may be a single-crystal cell, a multi-crystal cell, etc., and the cell production technology includes, but is not limited to, PERC (Passivated Emitter and Rear Cell, passivated emitter and back cell technology), N-type and N-type emitter junction passivated all back field diffusion cell technology, and heterojunction cell technology, which is not limited in this embodiment of the present invention.
As can be seen from the foregoing embodiments, since the battery plate provided by the embodiment of the present invention includes a plurality of series-connected or parallel-connected battery strings 11, the battery strings 11 include a first battery piece 111 located at an end portion and a plurality of second battery pieces 112 located at a middle portion, and the first battery piece 111 and the second battery piece 112 are isosceles right triangle battery pieces, so that the battery strings 11 with the same light receiving area, the number of battery pieces required for the battery strings 11 arranged by adopting the battery pieces with the shape is smaller, and thus the series-connected voltage can be reduced, and the maximum voltage allowed by the PN junction of the battery pieces with the series-connected voltage can be avoided, and further the occurrence of safety accidents such as breakdown, short circuit, even heating and burning of the battery pieces can be avoided, so that the safety performance of the battery strings 11 formed by the first battery pieces 111 and the second battery pieces 112 is higher. And the first battery piece 111 and the second battery piece 112 are formed by cutting square battery pieces along diagonal lines, so that one square battery piece can be cut into 4 first battery pieces 111 or 4 second battery pieces 112, therefore, the square battery pieces only need to be cut twice when being cut, battery piece fragments generated when the square battery pieces are cut can be reduced, and the utilization rate of the battery pieces is improved.
In addition, since the first battery piece 111 and the second battery piece 112 realize current guidance through the first main grid 1111 and the second main grid 1121, and the two adjacent second battery pieces directly realize current guidance through the second main grid 1121, the battery pieces do not need to be connected by using the bus bar 7 or the welding strip, and only need to be electrically connected with each other when the battery strings 11 are typeset, so that the typesetting of the battery board 1 becomes simpler and more convenient, and the automatic production of the battery board 1 is facilitated to be improved.
In a second embodiment, as shown in fig. 8, the embodiment of the present invention further provides a photovoltaic module, which includes the panel 1 according to any one of the first embodiment.
Specifically, as shown in fig. 10, the battery strings 11 with different shapes may be arranged by different numbers of the first battery pieces 111 and the second battery pieces 112, so that the battery strings 11 have different power generation. And then the battery strings 11 with different numbers are connected in series to form the battery board 1, and the battery boards 1 can be bonded through the conductive adhesive 113 and the conductive adhesive tape or welded through tin-coated oxygen-free copper strips (bus bars 7) to form the photovoltaic module. The photovoltaic module has the beneficial effects identical to those of the battery plate 1, and the embodiment of the invention is not repeated.
Optionally, as shown in fig. 8, the photovoltaic module further includes a front cover plate 2, a rear cover plate 3, a first packaging adhesive film 4, and a second packaging adhesive film 5; the front cover plate 2 is adhered to the light receiving surface of the battery plate 1 through the first packaging adhesive film 4, and the rear cover plate 3 is adhered to the backlight surface of the battery plate 1 through the first packaging adhesive film 4.
Specifically, the front cover plate 2, the battery plate 1 and the rear cover plate 3 are laminated through the first packaging adhesive film 4 and the second packaging adhesive film 5 to form a semi-finished product of the photovoltaic module. Then, the semi-finished photovoltaic module is put into a laminating machine, and the semi-finished photovoltaic module is changed into a laminated piece after a lamination process of 20min at 140 ℃. The laminate, once assembled with the junction box 9 and the frame 8 (or mounting module), forms the finished photovoltaic module. The light receiving surface of the formed photovoltaic module is shown in fig. 10, and the backlight surface of the formed photovoltaic module is shown in fig. 11. As shown in fig. 9 and 11, the outgoing line 6 passes through the back cover plate 3 and is connected with the junction box 9, so that the current generated by the photovoltaic module is led out for a user to use. The distance between two adjacent outgoing lines 6 is 5mm to 7mm, and the outgoing length of the outgoing line 6 is 13mm to 15mm.
It should be noted that, the front cover plate 2 may be transparent material such as glass or acrylic plate with thickness of 2 mm-5 mm and has high mechanical strength, so as to ensure that the front cover plate 2 has high light transmittance and mechanical strength, and prolong the service life of the photovoltaic module. In addition, the first packaging adhesive film 4 may be EVA (Ethylene Vinyl Acetate, vinyl acetate) with light transmittance greater than 91%, POE (olyolefin elastomer, polyolefin elastomer) or transparent silica gel, and the like, and the adhesive material may avoid the influence of the adhesive material on the light transmission during the adhesion. The second packaging adhesive film 5 can be transparent, white or other EVA, POE or silica gel materials. The back cover plate 3 may be a back plate, glass, or the like. The frame 8 can be aluminum alloy or plastic frame 8, and the frame 8 can be replaced by a mounting block in the case that the front cover plate 2 and the rear cover plate 3 are both glass cover plates. The junction box 9 may be a single structure, or an intelligent junction box 9 having an inverter function or an automatic switching function may be used, which is not limited in the embodiment of the present invention. As shown in fig. 12, the bus bar 7 may include a first bus bar 71 and a second bus bar 72, and the first bus bar 71 and the second bus bar 72 are welded, wherein the thickness of the first bus bar 71 is 0.12mm, and the thickness of the second bus bar 72 is 0.4mm, and the current in the photovoltaic module is led out, mainly for welding with the metal electrode of the junction box 9, for connecting two strings 11 adjacent in the Y direction in parallel.
It should be noted that, because this photovoltaic module is typesetting, only need mutual electric connection can between the battery piece, consequently for photovoltaic module's preparation can adopt automatic printing to add the mode of automatic laying and carry out the full automatization, thereby has avoided the automation difficult problem of current photovoltaic module manufacturing procedure, and then can improve this photovoltaic module's production efficiency, is favorable to increasing this photovoltaic module's productivity.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the apparatus in the embodiments of the present invention is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (11)
1. A panel comprising a plurality of series or parallel strings of cells;
the battery string comprises a plurality of first battery pieces positioned at the end parts and a plurality of second battery pieces positioned at the middle parts; the first battery piece and the second battery piece are isosceles right triangle battery pieces, and the length of the bevel edge of the first battery piece is larger than that of the bevel edge of the second battery piece;
in a first direction, the right-angle sides of every two adjacent second battery pieces are electrically connected, the right-angle sides of the first battery pieces are electrically connected with the right-angle sides of the second battery pieces, in a second direction, the oblique sides of every two adjacent second battery pieces are aligned, and the first direction and the second direction are two intersecting directions;
at least one first battery piece is arranged at the first end of the battery string, and at least two first battery pieces are arranged at the second end of the battery string;
the straight line where the bevel edge of the first battery piece is located at the first end is intersected with the straight line where the bevel edge of the second battery piece is located, the bevel edge of one first battery piece and the bevel edge of the second battery piece are located at the second end in the same direction, and the straight line where the bevel edge of the other first battery piece is located at the second end is intersected with the straight line where the bevel edge of the second battery piece is located.
2. The battery panel according to claim 1, wherein the number m of the first battery pieces and the number n of the second battery pieces included in the battery string satisfy:
m=3, n=2x+1, where x is 0.
3. The panel of claim 1, wherein the first battery sheet includes a first primary grid and a first secondary grid thereon, and the second battery sheet includes a second primary grid and a second secondary grid thereon;
the first main grid is arranged on the right-angle side and the inclined side of the first battery piece, and two ends of the first auxiliary grid are respectively perpendicular to the two right-angle sides of the first battery piece;
the second main grid is arranged on the right-angle side of the second battery piece, and two ends of the second auxiliary grid are respectively perpendicular to the two right-angle sides of the second battery piece.
4. A panel according to claim 3, wherein the width D of the first primary grid 1 Width D of the second main grid 2 The method meets the following conditions:
0.2mm≤D 1 ≤3mm，0.2mm≤D 2 ≤3mm；
width D of the first sub-grid 3 Width D of the second auxiliary gate 4 The method meets the following conditions:
0.01mm≤D 3 ≤0.05mm，0.01mm≤D 4 ≤0.05mm。
5. the panel of claim 3, wherein the first and second primary grids are each independently a solid line primary grid or a hollowed-out primary grid, wherein the hollowed-out primary grid is any one of a segmented hollowed-out, a triangular hollowed-out, and a diamond hollowed-out.
6. The panel of claim 1, wherein the length L of the beveled edge of the first battery tab 1 And a length L of a hypotenuse of the second battery piece 2 The relationship between them satisfies:
0＜L 1 -L 2 ≤15mm；
and the length L of the bevel edge of the first battery piece 1 The method meets the following conditions: l is 150mm or less 1 ≤210mm。
7. The panel of claim 1, wherein the right-angle sides of each two adjacent second cells are overlapped by a conductive paste in the first direction, and the right-angle sides of the first and second cells are overlapped by a conductive paste.
8. The panel of claim 1, wherein the bottom corners of the first and second battery pieces are chamfered.
9. The panel of claim 1, wherein the first battery tabs at the second end of the battery string are connected in an insulated manner.
10. A photovoltaic module comprising the panel of any one of claims 1-8.
11. The photovoltaic module of claim 10, further comprising a front cover plate, a back cover plate, a first encapsulating film, and a second encapsulating film;
the front cover plate is adhered to the light receiving surface of the battery plate through the first packaging adhesive film, and the rear cover plate is adhered to the backlight surface of the battery plate through the first packaging adhesive film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010827533.2A CN114156352B (en) | 2020-08-17 | 2020-08-17 | Battery plate and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010827533.2A CN114156352B (en) | 2020-08-17 | 2020-08-17 | Battery plate and photovoltaic module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114156352A CN114156352A (en) | 2022-03-08 |
| CN114156352B true CN114156352B (en) | 2024-02-27 |
Family
ID=80460510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010827533.2A Active CN114156352B (en) | 2020-08-17 | 2020-08-17 | Battery plate and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114156352B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1065198A (en) * | 1996-08-13 | 1998-03-06 | Mitsubishi Heavy Ind Ltd | Right-angled triangular solar cell module and manufacturing method thereof |
| CN1941428A (en) * | 2005-09-30 | 2007-04-04 | 三洋电机株式会社 | Rectangular shaped solar cell module and its manufacturing method using hexagonal shaped unit solar cells |
| CN103280467A (en) * | 2013-05-21 | 2013-09-04 | 浙江正泰太阳能科技有限公司 | Electrode pattern design for solar cell piece |
| JP2014045159A (en) * | 2012-08-29 | 2014-03-13 | Sharp Corp | Solar cell unit, solar cell unit with wiring sheet and solar cell module |
| KR20180060579A (en) * | 2016-11-29 | 2018-06-07 | (주)루바니 | Smart sheet combined pattern pieces of solar cell and manufacturing method thereof |
| CN110226237A (en) * | 2016-09-26 | 2019-09-10 | 荷兰应用科学研究组织 | Thin film photovoltaic module |
-
2020
- 2020-08-17 CN CN202010827533.2A patent/CN114156352B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1065198A (en) * | 1996-08-13 | 1998-03-06 | Mitsubishi Heavy Ind Ltd | Right-angled triangular solar cell module and manufacturing method thereof |
| CN1941428A (en) * | 2005-09-30 | 2007-04-04 | 三洋电机株式会社 | Rectangular shaped solar cell module and its manufacturing method using hexagonal shaped unit solar cells |
| JP2014045159A (en) * | 2012-08-29 | 2014-03-13 | Sharp Corp | Solar cell unit, solar cell unit with wiring sheet and solar cell module |
| CN103280467A (en) * | 2013-05-21 | 2013-09-04 | 浙江正泰太阳能科技有限公司 | Electrode pattern design for solar cell piece |
| CN110226237A (en) * | 2016-09-26 | 2019-09-10 | 荷兰应用科学研究组织 | Thin film photovoltaic module |
| KR20180060579A (en) * | 2016-11-29 | 2018-06-07 | (주)루바니 | Smart sheet combined pattern pieces of solar cell and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114156352A (en) | 2022-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3223120U (en) | Solar cell module | |
| CN105874609A (en) | Module fabrication of solar cells with low resistivity electrodes | |
| CN210200746U (en) | Main-grid-free solar cell and main-grid-free solar photovoltaic module | |
| CN111403490B (en) | Preparation method of solar cell interconnection structure | |
| CN112670376B (en) | Connection method of solar cell | |
| CN113611766B (en) | Solar cell module and preparation method thereof | |
| JP2008300449A (en) | Solar cell module and method of manufacturing the same | |
| CN209981250U (en) | Back contact laminated solar cell string and laminated solar cell assembly | |
| CN115241295A (en) | Photovoltaic cell unit and application thereof | |
| JP7085613B2 (en) | Manufacturing method of solar cell module, glass building material, and solar cell module | |
| CN214378470U (en) | Laminated tile battery string and laminated tile assembly | |
| JP2015230985A (en) | Solar battery cell, manufacturing method for the same and solar battery panel | |
| CN111223950A (en) | Solar panel and solar cell module | |
| CN114156352B (en) | Battery plate and photovoltaic module | |
| CN110649119A (en) | Solar power generation assembly based on crystalline silicon and preparation method thereof | |
| CN209785953U (en) | Photovoltaic conductive backboard and solar cell module | |
| WO2022267587A1 (en) | Flexible and rollable back-contact solar cell module and preparation method therefor | |
| CN115498055A (en) | Photovoltaic module and preparation method thereof | |
| CN213026153U (en) | Grid line interconnection photovoltaic module structure | |
| CN215988784U (en) | Solar cell and photovoltaic module | |
| CN215451436U (en) | Photovoltaic battery pack string based on back contact lamination technology | |
| CN210897313U (en) | Solar power generation assembly based on crystalline silicon | |
| JP2011249736A (en) | Solar cell module manufacturing method | |
| CN110931589A (en) | Solar cell, cell string and solar cell module | |
| CN113421938B (en) | Solar cell module, efficient laminated curved surface photovoltaic tile and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |