CN113611765A - Photovoltaic module and photovoltaic power generation system - Google Patents

Photovoltaic module and photovoltaic power generation system Download PDF

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Publication number
CN113611765A
CN113611765A CN202110736662.5A CN202110736662A CN113611765A CN 113611765 A CN113611765 A CN 113611765A CN 202110736662 A CN202110736662 A CN 202110736662A CN 113611765 A CN113611765 A CN 113611765A
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row
battery pieces
cells
battery
pieces
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CN113611765B (en
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罗丽珍
彭文博
陈雄飞
李晓磊
高虎
田鸿翔
朱文哲
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Huaneng Clean Energy Research Institute
Huaneng Group Technology Innovation Center Co Ltd
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Huaneng Clean Energy Research Institute
Huaneng Group Technology Innovation Center Co Ltd
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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
    • 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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  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • 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 provides a photovoltaic module and a photovoltaic power generation system, the photovoltaic module comprises battery pieces and a compensating piece, the battery pieces are arranged in multiple rows, each row of battery pieces comprises a plurality of battery pieces which are sequentially arranged along a first direction, the multiple rows of battery pieces comprise a first row of battery pieces, a second row of battery pieces and a third row of battery pieces which are sequentially and adjacently arranged along a second direction, the second row of battery pieces are arranged along the first direction in a staggered mode, and the third row of battery pieces are arranged along the first direction in a staggered mode. The compensation piece is used for compensating the jagged margin of the edge caused by the staggered arrangement of the cells, and the power generation efficiency of the photovoltaic module per unit area is improved. The battery pieces in each row of battery pieces and the corresponding compensation pieces are connected in parallel, and the adjacent rows of battery pieces are connected in series, so that the uncovered battery pieces close to the covered battery pieces can dredge current through the adjacent parallel nodes, and therefore the hot spot effect of the photovoltaic module is eliminated, and the power loss caused by local shielding is reduced.

Description

Photovoltaic module and photovoltaic power generation system
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module and a photovoltaic power generation system with the photovoltaic module.
Background
As a new energy, compared with the traditional fossil fuel, the solar energy has the advantages of inexhaustibility, cleanness, environmental protection and the like. The photovoltaic module is a core part in a photovoltaic power generation system, and the current photovoltaic module mainly has the following problems: the cells in the photovoltaic module are connected in series, and a small local shading will cause large power loss and cause hot spots to accelerate the aging of the module. This problem is particularly evident in double-sided power generating photovoltaic modules. Moreover, the solar cell is easy to crack during the production, transportation and use processes of the photovoltaic module. The subfissure cells (solar cells) in the conventional photovoltaic module cause the obstruction degree of a current channel in the photovoltaic module to be reduced and electrical mismatch among the cells to cause the power of the module to be reduced.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
in order to solve the problems, the application 201820494650.X discloses a double-faced laminated tile assembly, photovoltaic modules are connected in series and parallel in a staggered mode, and the power generation efficiency of the photovoltaic modules is greatly improved. However, the zigzag structure at the edge of the double-sided assembly of the laminated tile leaves a zigzag blank at the edge of the photovoltaic assembly, and the zigzag blank without power generation reduces the power generation efficiency of the photovoltaic assembly in a unit area.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, the invention proposes a photovoltaic module and a photovoltaic power generation system with such a photovoltaic module.
The photovoltaic module according to the invention comprises: the battery pieces are arranged in multiple rows, each row of battery pieces comprises a plurality of battery pieces which are sequentially arranged along a first direction, the multiple rows of battery pieces comprise a first row of battery pieces, a second row of battery pieces and a third row of battery pieces which are sequentially and adjacently arranged in a second direction, the second row of battery pieces are staggered with the first row of battery pieces along the first direction, and the third row of battery pieces are staggered with the second row of battery pieces along the first direction; and the compensator, the compensator includes first compensator, first compensator with the second is arranged the battery piece and is corresponded the setting and with first row battery piece is in parallel and level in the second direction, works as the battery piece is followed to the third row battery piece is relative when first row battery piece staggers, the compensator includes the second compensator, the second compensator with the third row battery piece corresponds the setting and with first row battery piece is in parallel and level in the second direction, wherein, in every row battery piece connect in parallel each other between battery piece and the compensator that corresponds, establish ties each other between the adjacent row battery piece.
According to the photovoltaic module provided by the embodiment of the invention, the mixed connection staggered compensation type photovoltaic module is provided, the staggered cell arrangement is used for dealing with the irregularity of hot spots and shielding, the mismatch loss in the photovoltaic module is reduced, and the shielding resistance of the photovoltaic module is improved. And the compensation piece is utilized to compensate the sawtooth-shaped blank at the edge of the photovoltaic module, so that the unit area power generation efficiency of the photovoltaic module is improved. In addition, the photovoltaic module provided by the embodiment of the invention adopts a circuit connection mode of mesh mixed connection, so that the unblocked cell close to the blocked cell can dredge current through the adjacent parallel node, thereby limiting the blocking loss in a smaller range near the blocked cell, eliminating the hot spot effect of the photovoltaic module and reducing the power loss caused by local blocking.
In some embodiments, the battery pieces are identical, the battery pieces are rectangular, the length of each battery piece extends along the first direction, the length of each battery piece is L, and the nth row of battery pieces is preset in the first directionThe upper row of the battery pieces is staggered with the N-1 th row of the battery pieces by a distance of YN-1I, N is greater than or equal to 2, | YN-1Both units of | and L are in millimeters, | YN-1And | is not less than 1 mm and not more than (L-1) mm.
In some embodiments, the battery pieces are identical, the battery pieces are rectangular, the length of the battery pieces extends along the first direction, the length of the battery pieces is L, and the nth row of battery pieces is preset to be staggered relative to the first row of battery pieces in the first direction by a distance | XN-1I, N is greater than or equal to 2, | XN-1Both units of | and L are in millimeters, | XN-1And | is not less than 1 mm and not more than (L-1) mm.
In some embodiments, the second row of cells is staggered from the first row of cells by a distance | Y in the first direction1The third row of battery pieces is staggered relative to the second row of battery pieces in the first direction by a distance of Y2The third row of battery pieces is staggered relative to the first row of battery pieces in the first direction by a distance | X2|，|X2|＝|Y1|+|Y2|。
In some embodiments, | Y1I and Y2L is not equal.
In some embodiments, the third row of cells is flush with the first row of cells in the second direction.
In some embodiments, adjacent rows of cells are overlapped or welded to each other to be connected in series.
In some embodiments, the compensator is made of a battery sheet.
In some embodiments, the battery pieces are identical, the battery pieces are rectangular, the length of the battery pieces extends along the first direction, the length of the battery pieces is L, the first compensation piece comprises two first sub-compensation pieces, and the length of one first sub-compensation piece in the first direction is L1Another of the first sub-compensators has a length L in the first direction2,L1+L2＝L。
The invention further provides a photovoltaic power generation system which comprises the photovoltaic module in the embodiment.
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
Fig. 1 is a schematic view of a photovoltaic module according to a first embodiment of the present invention.
Fig. 2 is a schematic view of a photovoltaic module according to a second embodiment of the present invention.
Reference numerals:
a photovoltaic component 1, a cell piece 10,
The compensator 20, the first compensator 21, the first sub-compensator 211, the second compensator 22,
A first row of battery pieces R1, a second row of battery pieces R2, a third row of battery pieces R3 and an Nth row of battery pieces RN.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A photovoltaic module 1 according to an embodiment of the present invention is described below with reference to fig. 1 to 2. The photovoltaic module 1 includes a plurality of cells 10 arranged in an array. The battery pieces 10 are arranged in a plurality of rows, and each row of battery pieces comprises a plurality of battery pieces 10 which are sequentially arranged along a first direction. The multiple rows of battery pieces 10 are sequentially arranged along the second direction, and include a first row of battery pieces R1, a second row of battery pieces R2, and a third row of battery pieces R3, which are sequentially and adjacently arranged, and the second row of battery pieces R2 is sandwiched between the first row of battery pieces R1 and the third row of battery pieces R3. The first direction is shown by arrow a in fig. 1 and the second direction is shown by arrow B in fig. 1.
The second row of cells R2 is offset from the first row of cells R1 in the first direction, and the third row of cells R3 is offset from the second row of cells R2 in the first direction. That is to say, the photovoltaic module 1 provided in the embodiment of the present application includes at least three rows of battery pieces, and the battery pieces in adjacent rows are arranged in a staggered manner along the first direction, it can be understood that the direction of staggering the battery pieces R2 in the second row relative to the battery pieces R1 in the first row and the direction of staggering the battery pieces R3 in the third row relative to the battery pieces R2 in the second row may be the same or different. In some embodiments, the third row of cells R3 is not aligned with the first row of cells R1, in other embodiments, the third row of cells R3 may be aligned with the first row of cells R1.
The photovoltaic module provided by the embodiment of the application further comprises a compensation piece 20, wherein the compensation piece 20 comprises a first compensation piece 21, and the first compensation piece 21 is arranged corresponding to the second row of cell pieces R2 and is aligned with the first row of cell pieces R1 in the second direction. When the third row of cells R3 is misaligned in the first direction with respect to the first row of cells R1, the compensating member 20 further includes a second compensating member 22. The second compensation member 22 is disposed corresponding to the third row of the cell sheet R3 and is aligned with the first row of the cell sheet R1 in the second direction. The compensator 20 is used to compensate for the edge jagged voids due to the staggered arrangement of the cells, thereby compensating for the reduced power generation efficiency per unit area of the photovoltaic module due to such jagged voids.
For a common photovoltaic module, when the current allowed by the shielded battery unit is reduced (the equivalent resistance is increased) after shielding, the whole series long string is clamped due to the reduction of the current of the shielded battery unit, and the power generation of the whole battery string is lost. The photovoltaic module provided by the embodiment of the application adopts a circuit connection mode of mesh mixed connection, so that the cell pieces 10 in each row of cell pieces and the corresponding compensation pieces 20 are connected in parallel, and the adjacent rows of cell pieces are connected in series, that is, the cell pieces 10 and the compensation pieces 20 are connected in circuit in a serial-parallel connection mode, so that all the cell pieces 10 share a conductive channel. Therefore, when part of the battery pieces are shielded, the non-shielded battery pieces close to the shielded battery pieces can dredge current through the adjacent parallel nodes, and therefore shielding loss is limited in a small range near the shielded battery pieces. Specifically, the upper edge of the front surface of the cell piece 10 is provided with an upper edge electrode, the lower edge of the back surface of the cell piece 10 is provided with a lower edge electrode, and adjacent rows of cell pieces are connected in series with each other through the connection of the upper edge electrode and the lower edge electrode.
According to the photovoltaic module provided by the embodiment of the invention, the mixed connection staggered compensation type photovoltaic module is provided, the staggered cell arrangement is used for dealing with the irregularity of hot spots and shielding, the mismatch loss in the photovoltaic module is reduced, and the shielding resistance of the photovoltaic module is improved. And the compensation piece is utilized to compensate the sawtooth-shaped blank at the edge of the photovoltaic module, so that the unit area power generation efficiency of the photovoltaic module is improved. In addition, the photovoltaic module provided by the embodiment of the invention adopts a circuit connection mode of mesh mixed connection, so that the unblocked cell close to the blocked cell can dredge current through the adjacent parallel node, thereby limiting the blocking loss in a smaller range near the blocked cell, eliminating the hot spot effect of the photovoltaic module and reducing the power loss caused by local blocking.
In some embodiments, the photovoltaic module 1 includes an nth row of cells, and the nth row of cells is preset to be staggered from the nth-1 row of cells by a distance | Y in the first directionN-1And | N is greater than or equal to 2. Y isN-1May be positive or negative, for example, when the Nth row of cells is shifted to the right in the first direction relative to the Nth-1 row of cells, YN-1When the N row of cells is deviated leftwards relative to the N-1 row of cells in the first direction, Y is a positive valueN-1Is negative. Presetting the staggered distance of the Nth row of battery pieces relative to the first row of battery pieces in the first direction as | XN-1And | N is greater than or equal to 2. I XN-1|＝|Y1+Y2+..+YN-1|。
It can be understood that | YN-1| X is greater than 0 |N-1I is greater than or equal to 0, that is, two adjacent rows of battery pieces are arranged in a staggered manner, and the nth row of battery pieces may be aligned with the first row of battery pieces R1 or not aligned with the first row of battery pieces R1. When | XN-1When | is equal to 0, the Nth row of battery pieces is aligned with the first row of battery pieces R1, and when | XN-1When | is larger than 0, the nth row of battery pieces is staggered with the first row of battery pieces R1.
Two specific embodiments provided by the present application are described below by way of example in fig. 1 and 2. In both embodiments, the technical solution of the present application is described by taking the first direction as the left-right direction and the second direction as the up-down direction as an example.
The first embodiment is as follows:
as shown in fig. 1, the photovoltaic module 1 includes a plurality of cells 10 arranged in an array. The plurality of battery pieces 10 constitute a first row of battery pieces R1, a second row of battery pieces R2, a third row of battery pieces R3, and an nth row of battery pieces RN which are adjacently arranged in this order in the up-down direction (second direction). Each row of the battery cells includes a plurality of battery cells 10 arranged in sequence in the left-right direction (first direction). It is understood that N is greater than 3 in this embodiment.
The first row of cells R1 of the photovoltaic module 1 provided in this embodiment includes 10 cells 10, and all the cells 10 are arranged in 60 rows, that is, in this embodiment, N is equal to or less than 60. It should be noted that fig. 1 is an omitted view of the photovoltaic module 1, and is only a schematic view of the photovoltaic module 1 provided in this embodiment, and does not represent a specific structure of the photovoltaic module 1. In other embodiments, the photovoltaic module 1 may have other arrangements, which are not illustrated here.
As shown in fig. 1, the battery cells 10 are identical. That is, the specifications and the sizes of the battery cells 10 are the same. The battery piece 10 is rectangular, the long side of the battery piece 10 extends in the left-right direction, the wide side extends in the up-down direction, and the length of the long side of the battery piece 10 is L, and the unit of L is millimeter. Alternatively, the size of the battery piece 10 is 182mm × 30 mm.
As shown in fig. 1, the first row of cell pieces R1 and the nth row of cell pieces RN are level in the up-down direction, and the first row of cell pieces R1 and the nth row of cell pieces RN are level in the up-down direction: the left edge of the first row of battery pieces R1 is flush with the left edge of the nth row of battery pieces RN in the up-down direction, the right edge of the first row of battery pieces R1 is flush with the right edge of the nth row of battery pieces RN in the up-down direction, or the straight line of the left edge of the first row of battery pieces R1 coincides with the straight line of the left edge of the nth row of battery pieces RN and extends in the up-down direction, and the straight line of the right edge of the first row of battery pieces R1 coincides with the straight line of the right edge of the nth row of battery pieces RN and extends in the up-down direction.
The second row of battery pieces R2, the third row of battery pieces R3 and the (N-1) th row of battery pieces all comprise 9 battery pieces. The second row of battery pieces R2 is staggered with the first row of battery pieces R1 along the first direction, the third row of battery pieces R3 is staggered with the second row of battery pieces R2 along the first direction, and the Nth row of battery pieces is staggered with the (N-1) th row of battery pieces along the first direction. The edges of the photovoltaic module 1 form a saw-toothed blank. The compensator 20 is used to compensate for the jagged blank.
Let the second row of cells R2 be shifted in the left-right direction by a distance Y from the first row of cells R11The third row of cells R3 is offset from the second row of cells R2 in the left-right direction by a distance Y2The Nth row of battery plates RN are staggered from the Nth-1 row of battery plates by a distance Y in the left-right directionN-1|。|Y1|、|Y2| or | YN-1The units of | are millimeters.
Alternatively, | Y1|、|Y2| or | YN-1L is greater than 0mm and less than L mm. The arrangement is such that any cell 10 in the second row, the third row and the (N-1) th row of cells R2, R3 is not flush with any cell 10 in the previous row in the second direction, thereby increasing the irregularity degree of the arrangement of the cells 10 in the photovoltaic module 1. Further optionally, | Y1|、|Y2| or | YN-1The | is greater than or equal to 1 mm and less than or equal to (L-1) mm, so that the irregularity degree of the arrangement of the cells 10 in the photovoltaic module 1 is further increased.
Alternatively, | Y1|、|Y2| or | YN-1At least two values in | are not equal, so that the irregularity degree of the arrangement of the cells 10 in the photovoltaic module 1 is further increased, the mismatch loss in the photovoltaic module 1 is reduced, and the shielding resistance of the photovoltaic module 1 is improved.
The second row of cells R2 is offset from the first row of cells R1 by a distance | X in the left-right direction1I, it is understood that I X1|＝|Y1The third row of battery pieces R3 is shifted from the first row of battery pieces R1 in the left-right direction by a distance | X2The X row of battery pieces is staggered with respect to the first row of battery pieces R1 by a distance | X in the first directionX-1L. X is less than or equal to N-1.
Optionally, | XX-1L is greater than 0mm and less than L mm. So arranged that the secondThe row of the cells R2, the third row of the cells R3 and the (N-1) th row of the cells 10 are not flush with any of the cells 10 in the first row of the cells R1 in the second direction, so that the irregularity degree of the arrangement of the cells 10 in the photovoltaic module 1 is increased, the mismatch loss inside the photovoltaic module 1 is reduced, and the shading resistance of the photovoltaic module 1 is increased. Further optionally, | XX-1The | is greater than or equal to 1 mm and less than or equal to (L-1) mm, and the irregularity degree of the arrangement of the cells 10 in the photovoltaic module 1 is further increased.
Alternatively, the compensation member 20 is cut (cut) from a battery sheet, i.e., the compensation member 20 is made of a battery sheet. The compensator 20 includes a first compensator 21, a second compensator 22, and up to an N-2 th compensator. The first compensation piece 21 is disposed corresponding to the second row of the battery pieces R2, and is used for compensating the blank position of the second row of the battery pieces R2 formed by staggering with the first row of the battery pieces R1. The second compensation piece 22 is disposed corresponding to the third row of battery pieces R3 and is used for compensating the blank position of the third row of battery pieces R3 formed by staggering with the second row of battery pieces R2. The N-2 compensation piece is arranged corresponding to the N-1 row of battery pieces and is used for compensating the blank position of the N-1 row of battery pieces formed by staggering the N-2 row of battery pieces. The compensation piece 20 compensates the jagged blank of the edge of the photovoltaic module 1, and improves the power generation efficiency per unit area of the photovoltaic module 1.
Since the second row cell piece R2, the third row cell piece R3 and up to the N-1 th row cell piece each include 9 cell pieces, that is, the length of the second row cell piece R2, the third row cell piece R3 and up to the N-1 th row cell piece is shorter than that of the first row cell piece R1 and the N-1 th row cell piece RN by the length of one cell piece 10. Therefore, the total length of the first compensation member 21, the total length of the second compensation member 22, and the total length of the N-2 th compensation member in the left-right direction are all equal to L.
Specifically, as shown in fig. 1, the first compensation member 21, the second compensation member 22, and the N-2 th compensation member each include two sub-compensation members. Taking the first compensation member 21 as an example, the first compensation member 21 includes two first sub-compensation members 211, wherein one first sub-compensation member 211 is disposed at the left side of the second row of battery pieces R2 and is disposed in parallel with the second row of battery pieces R2, and the other first sub-compensation member 211 is disposedOn the right side of and juxtaposed with the second row of cells R2. The first sub-compensator 211 disposed at the left side has a length L in the left-right direction1The first sub-compensator 211 disposed at the right side has a length L in the left-right direction2. It will be appreciated that L1＝|Y1|，L2＝L-|Y1|，L1+L2L. The second compensation element 22 and the Nth compensation element have the same structure, and the description thereof is omitted.
In the present embodiment, as shown in fig. 1, the second row of cell R2 is offset to the right with respect to the first row of cell R1, and the third row of cell R3 is offset to the right with respect to the second row of cell R2. The third row of battery pieces R3 is staggered with respect to the first row of battery pieces R1 by a distance | X in the first direction2|。|X2|＝|Y1|+|Y2L. Further, the fourth row of battery pieces can continue to move rightward relative to the third row of battery pieces and can also move leftward relative to the third row of battery pieces.
That is, among the second row cell piece R2, the third row cell piece R3, and up to the N-1 th row cell piece, a part of the rows are continuously shifted to the right, and a part of the rows are continuously shifted to the left. The irregularity degree of the cell pieces 10 in the photovoltaic module 1 is further increased, the mismatch loss inside the photovoltaic module 1 is reduced, and the shielding resistance of the photovoltaic module 1 is improved.
The battery plates 10 in each row of battery plates and the corresponding compensation members 20 are connected in parallel, and the battery plates in adjacent rows are connected in series. Specifically, taking the first row of the cell sheets R1 as an example, the cell sheets 10 in the first row of the cell sheets R1 and the two first sub-compensators 211 are connected in parallel with each other. The first row of battery pieces R1, the second row of battery pieces R2, the third row of battery pieces R3 and the Nth row of battery pieces are connected in series.
Optionally, the adjacent rows of battery pieces are overlapped or welded with each other to be connected in series. The overlapped series connection is called a shingled series connection, that is, the lower edge of the battery piece in the previous row is overlapped on the upper edge of the battery piece in the next row so as to be connected in series with each other.
Alternatively, the cell sheet 10 is made of a single-sided solar power generation cell sheet or a double-sided solar power generation cell sheet. The compensation member 20 is made of a single-sided solar power generation cell or a double-sided solar power generation cell.
Example two:
fig. 2 is taken as an example to describe a second embodiment provided in the present application, and as shown in fig. 2, this embodiment is similar to the first embodiment, and only the differences between this embodiment and the first embodiment are described below, and the descriptions of the same parts are omitted.
As shown in fig. 2, the second row of cell pieces R2 is offset rightward with respect to the first row of cell pieces R1 in the left-right direction, and the third row of cell pieces R3 is offset leftward with respect to the second row of cell pieces R2 in the left-right direction. The first row of cells R1 and the third row of cells R3 are flush in the up-down direction. That is, Y2＝-Y1，|X2|＝|Y1+Y2And | ═ 0. The other rows of the battery pieces R3 are repeatedly arranged in the vertical direction according to the rule of the first row of the battery pieces R1, the second row of the battery pieces R2 and the third row of the battery pieces R3.
In other words, the cells in the even rows are all shifted rightward relative to the cells in the first row R1 in the left-right direction, and the cells in the odd rows are all aligned with the cells in the first row R1 in the up-down direction. Alternatively, the even-numbered rows of cells are all shifted rightward by 3 mm, i.e., | Y, in the left-right direction with respect to the first row of cells R11|、|Y2|、|Y3| or | YNAll | are 3 mm. In other embodiments, the even number of rows of cells may be offset to the right in the left-right direction by different distances relative to the first row of cells R1.
In the present embodiment, as shown in fig. 2, the compensation member 20 is only disposed at a position corresponding to an even number of rows of battery pieces, so as to compensate for a jagged blank formed at an edge of each row of battery pieces, and improve the light emitting efficiency of the photovoltaic module 1.
Taking the two first sub-compensators 211 disposed on the second row of cells R2 as an example, the length of the first sub-compensator 211 positioned at the left side of the second row of cells R2 in the left-right direction is L1The first sub-compensator 211 disposed at the right side has a length L in the left-right direction2. It will be appreciated that L1＝|Y1|，L2＝L-|Y1|，L1+L2＝L。
To sum up, the photovoltaic module 1 provided by the present application includes the following beneficial effects:
the unblocked battery pieces close to the blocked battery pieces can dredge current through the adjacent parallel nodes, so that blocking loss is limited in a small range near the blocked battery pieces, the hot spot effect of the assembly is eliminated, and the power loss caused by local blocking is reduced; the photovoltaic module is extremely densely arranged, generates electricity in a full screen mode, and is staggered and complementary, so that the unit area electricity generation amount of the photovoltaic module is greatly increased; the photovoltaic module is irregular and complementary, and the shading resistance of the photovoltaic module is greatly improved by responding to hot spots and shading irregularities.
The application also provides a photovoltaic power generation system comprising the photovoltaic module 1, and the photovoltaic power generation system has the advantages of strong anti-shielding capacity and high power generation efficiency.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A photovoltaic module, comprising:
the battery pieces are arranged in multiple rows, each row of battery pieces comprises a plurality of battery pieces which are sequentially arranged along a first direction, the multiple rows of battery pieces comprise a first row of battery pieces, a second row of battery pieces and a third row of battery pieces which are sequentially and adjacently arranged in a second direction, the second row of battery pieces are staggered with the first row of battery pieces along the first direction, and the third row of battery pieces are staggered with the second row of battery pieces along the first direction; and
the compensating part comprises a first compensating part, the first compensating part is correspondingly arranged with the second row of battery pieces and is flush with the first row of battery pieces in the second direction, when the third row of battery pieces is staggered relative to the first row of battery pieces in the first direction, the compensating part comprises a second compensating part, the second compensating part is correspondingly arranged with the third row of battery pieces and is flush with the first row of battery pieces in the second direction,
the upper edge of the front surface of each battery piece is provided with an upper edge electrode, the lower edge of the back surface of each battery piece is provided with a lower edge electrode, adjacent rows of battery pieces are connected in series through the connection of the upper edge electrodes and the lower edge electrodes, and the battery pieces in each row of battery pieces are connected with the corresponding compensation pieces in parallel.
2. The assembly according to claim 1, wherein the cells are identical, the cells are rectangular, the length of the cells extends along the first direction, the length of the cells is L, and the nth row of cells is preset to be staggered from the nth-1 row of cells in the first direction by a distance of | YN-1I, N is greater than or equal to 2, | YN-1Both units of | and L are in millimeters, | YN-1L is greater than 0mm and less than L mm.
3. The assembly according to claim 1, wherein the cells are identical, the cells are rectangular, the length of the cells extends along the first direction, the length of the cells is L, and the nth row of cells is preset to be staggered from the first row of cells in the first direction by a distance | X |N-1I, N is greater than or equal to 2, | XN-1Both units of | and L are in millimeters, | XN-1L is greater than 0mm and less than L mm.
4. The assembly according to claim 1, wherein the second row of cells is offset from the first row of cells by a distance | Y in the first direction1The third row of battery pieces is staggered relative to the second row of battery pieces in the first direction by a distance of Y2The third row of battery pieces is staggered relative to the first row of battery pieces in the first direction by a distance | X2|，|X2|＝|Y1|+|Y2|。
5. Photovoltaic module according to claim 4, characterized in that | Y1I and Y2L is not equal.
6. The photovoltaic module of claim 1, wherein the third row of cells is flush with the first row of cells in the second direction.
7. The photovoltaic module according to claim 1, wherein the adjacent rows of the cells are overlapped with each other by a conductive adhesive or grid line interconnection to realize series connection, or the adjacent rows of the cells are welded by a solder strip to realize series connection.
8. The photovoltaic module of claim 1 wherein the compensator is made of a cell sheet.
9. The assembly according to claim 8, wherein the cells are identical, the cells are rectangular, and the cells are of the same shapeThe length of the first sub-compensation piece is L, the length of the first sub-compensation piece in the first direction is L, and the length of the first sub-compensation piece in the first direction is L1Another of the first sub-compensators has a length L in the first direction2,L1+L2＝L。
10. A photovoltaic power generation system, characterized by comprising a photovoltaic module according to any one of claims 1 to 9.
CN202110736662.5A 2021-06-30 2021-06-30 Photovoltaic module and photovoltaic power generation system Active CN113611765B (en)

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