• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Photovoltaic module with rear-face solar cells, in particular of the IBC type, comprising a first cell (101) assembled with a second cell (102), said second cell being arranged so that a peripheral zone of the rear face of the second cell overlaps a peripheral region of the front face of the first cell, a connection element connecting a conductive element of the peripheral region to another conductive element located on a peripheral zone of the rear face of the first cell (FIG. 6A) .
    公开号:FR3084206A1
    申请号:FR1856657
    申请日:2018-07-18
    公开日:2020-01-24
    发明作者:Paul Lefillastre；Eric Gerritsen
    申请人:Commissariat a lEnergie Atomique CEA；Commissariat a lEnergie Atomique et aux Energies Alternatives CEA；
    IPC主号:
    专利说明:

    IMPROVED ASSEMBLY OF SOLAR CELLS WITH CONTACTS ON THE BACK PANEL DESCRIPTION
    TECHNICAL AREA
    The present application relates to the field of photovoltaic cells (PV), also called solar cells and more particularly that of cells with contacts on the rear face RCC (for “Rear Contact Cells”).
    The present invention relates to a particular assembly of solar cells with contact on the rear face, to a method for producing such an assembly as well as to a photovoltaic module comprising such an assembly.
    PRIOR STATE OF THE ART
    A solar cell is generally formed from a semiconductor substrate comprising doped regions having opposite types of conductivity and forming at least one junction. Electrical contacts, typically in the form of metal electrodes arranged in contact with the doped regions are provided on the surface of the cell.
    To increase the efficiency of a solar cell, a particular arrangement "with rear contact" RCC (for "Rear Contact Cells") has appeared. It consists, as in the example of cell 1 illustrated in FIG. 1A, in distributing the contacts 5, 7 to the doped regions, 4, 6 of N and P type on the rear face 2B of the cell, opposite to its front face 2A with a light receiving surface 3. The light-receiving surface is thus devoid of contact with the doped areas.
    Generally, to form a photovoltaic module capable of producing electrical energy at a given current and voltage, several solar cells are assembled and connected together to make a chain of cells, or even several chains of cells.
    A conventional assembly of rear face contact solar cells (RCC) is illustrated in FIG. 2 and provides for connecting li cells to each other,
    1 2 , I3 by means of metallic interconnection tapes 9 generally formed by welding and connecting a negative electrode 8a arranged on the rear face 2B of a cell li, l 2 and a positive electrode 8b arranged on the rear face of another cell 1 2 , 1 3 .
    In certain cases, in particular for large chains of cells, such an assembly may prove to be long to carry out and may lack robustness.
    The problem arises of making an improved assembly of contact cells on the rear face.
    STATEMENT OF THE INVENTION
    One embodiment of the present invention relates to an assembled structure or comprising an assembly of a set of photovoltaic cells with contacts on the rear face, the contact cells on the rear face of said assembly each having:
    a front face provided with at least one central region advantageously without contact or conductive element and intended to be exposed to the sun,
    a rear face, opposite to the front face, and comprising a central zone arranged opposite the central region of the front face, the central zone comprising one or more first contacts arranged respectively on one or more first regions doped with doping of type N, and one or more second contacts arranged respectively on one or more second regions doped with a P-type doping, said assembly comprising a first cell connected to a second cell of said assembly, said second cell being arranged so that a zone peripheral of the rear face of the second cell overlaps a peripheral region of the front face of the first cell, the first cell and the second cell being interconnected so that a first conductive element located at said peripheral region of said first cell is connected to and is in contact with a second conductive element ctor of said peripheral zone of said second cell, the first cell being further provided with at least one connection element connecting the first conductive element to another conductive element located on a peripheral portion of the rear face of the first cell.
    By “overlaps”, it is meant that the peripheral zone of the rear face of the rear cell overlaps in part with a peripheral region of the front face of the first cell.
    Typically, when the first conductive element is electrically connected to at least one of said first contacts or to an electrode electrically connected to at least one of said first contacts, the second conductive element is electrically connected to at least one of said second contacts or to a connected electrode electrically to at least one of said second contacts. An opposite polarity for which the first conductive element is connected to at least one of said second contacts or to an electrode connected to at least one of said second contacts, while the second conductive element is connected to at least one of said first contacts or to an electrode connected to at least one of said first contacts can also be provided.
    Such an arrangement makes it possible to optimize the active surface of the assembly and has a reduced bulk. Such an arrangement also has the advantage of allowing the implementation of a robust assembly. It also makes it possible to implement a photovoltaic module of improved efficiency. Such an arrangement also allows easier and faster assembly of the assembled cell structure.
    Throughout the following description, when the expression “conductive elements” is used, reference is made to electrically conductive elements. The terms and expressions “contacts” and “connection element” are also used to refer respectively to electrical contacts and electrical connection elements. Likewise, “connected to” and “interconnection refer to electrical connections or interconnections
    According to a first possibility of implementation, the connection element may comprise or be in the form of at least one via conductor crossing the thickness of said first cell.
    According to a second possibility of implementation, the connection element comprises a conductive strip which extends over a lateral edge of the first cell connecting the rear face and the front face of the first cell.
    Advantageously, the assembly can be provided with a third cell with contacts on the rear face, the second cell and the third cell being interconnected and partially overlapping, the assembled structure being arranged so that another peripheral zone of the rear face of the second cell overlaps a peripheral region of the front face of the third cell.
    According to one possibility, the assembly may include another cell, said other cell being connected and partially overlapping the first cell or the third cell, the assembly being arranged so that a peripheral zone of the rear face of said other cell is in contact with another peripheral region of the front face of the first cell, or with another peripheral region of the front face of the third cell.
    It is thus possible to assemble with cells located in a first plane and cells located in a second plane distinct from the first plane.
    An advantageous embodiment of the structure provides that in a given direction parallel to a main plane of the first cell and the second cell, the first cell has a first width Wb and the second cell has a second width Wa, such as Wb > Wa, the overlap being produced so that between the peripheral zone of the rear face of the second cell and the peripheral region of the front face of the first cell, the first cell and the second cell have respective central regions intended to be exposed to the sun of the same surface.
    A particular embodiment provides that said cells with contacts on the rear face of said assembly are IBC type solar cells, the first contacts and the second contacts being interdigitated.
    According to another aspect, the present invention relates to a photovoltaic module comprising an assembled structure as defined above.
    The present invention also relates to a method for producing an assembled structure of cells as defined above.
    One embodiment provides a method for producing an assembled structure of photovoltaic cells as defined above, the method comprising at least one step of cutting into several portions of a support provided with several cells with contacts on the rear face, said at least one support having an upper face on which the respective front faces of a plurality of contact cells on the rear face are arranged, and a lower face on which the respective rear faces of the cells of said plurality of contact cells on the rear face are arranged.
    Advantageously, said first cell and said second cell can result from cutting into several portions of the same support.
    According to one possible implementation, the step of cutting said support can be carried out in different portions of different surfaces corresponding respectively to cells of said plurality of cells having front faces of different surfaces.
    Advantageously, the cutting of said at least one support can be carried out in at least two portions having a first surface as well as in at least two other portions having a second surface less than the first surface.
    The assembled structure defined above can advantageously result from at least one assembly step between the first cell, the second cell and at least one third cell, the assembly step comprising steps consisting in:
    a) place the first cell and the second cell on a receiving surface and according to a determined spacing, then
    b) placing a peripheral zone of the second cell on peripheral regions of the first cell and of the second cell respectively.
    The advantage of such an assembly method is that it is quick to implement and allows the assembly of a large number of cells while saving time compared to a conventional assembly carried out using ribbons. two by two connecting the rear faces of PV cells.
    Advantageously, in step b) there is concomitantly a peripheral zone of a rear face of another cell on another peripheral region of the first cell or of the third cell. This can allow the realization of a simultaneous assembly of a large number of cells.
    The first cell and / or the second cell can result from cutting into several portions of the same support.
    After cutting said support into several portions and prior to assembly, it is advantageous to form at least one conductive strip on at least one lateral edge of said first cell and / or on at least one lateral edge of said second cell.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Other characteristics and advantages of the invention will emerge more clearly on reading the following description and with reference to the accompanying drawings, given for illustration only and in no way limitative.
    FIG. 1 is used to illustrate an example of a rear-contact type solar cell;
    FIG. 2 is used to illustrate an example of conventional assembly of solar cells with contacts on the rear face;
    FIGS. 3A-3B serve to illustrate an example of assembly of solar cells according to an embodiment of the present invention, according to a type interconnection technique, according to English terminology, called “shingle”, the cells being with rear contacts;
    FIGS. 4A-4B and 5A-5B serve to illustrate different connection structures making it possible to electrically connect the front face and the rear face of solar cells in an assembly as implemented according to the invention;
    FIGS. 6A-6B and 7A-7B serve to illustrate an example of an assembled structure provided with at least three solar cells with an improved arrangement allowing rapid assembly;
    FIGS. 8A-8B serve to illustrate an assembly with a plurality of solar cells distributed in the same plane and a plurality of other solar cells distributed in the same other plane;
    FIGS. 9A-9B serve to illustrate a distribution of contacts and conductive elements respectively on the rear and front faces of an IBC type solar cell capable of being integrated into an assembly as implemented according to the invention;
    FIGS. 10A-10B serve to illustrate an assembly with cells of different dimensions but capable of having the same active surface exposed to the sun;
    FIG. 11 is used to illustrate a step of cutting into elementary cells a support comprising several elementary solar cells at least partially formed, in particular of the IBC type;
    FIGS. 12 and 13A-13B serve to illustrate a step of cutting a support comprising several solar cells at least partially formed, into elementary cells of different dimensions;
    FIGS. 14A-14C serve to illustrate a step of cutting a support to form IBC type solar cells;
    FIGS. 15A-15D serve to illustrate an embodiment of connection elements between the front face and rear face of a solar cell of the IBC type and then an assembly on two planes of several cells of the same type;
    FIGS. 16A-16D serve to illustrate different configurations on the front face or the rear face of a solar cell of connection elements making it possible to connect the front face and rear face of this solar cell;
    Identical, similar or equivalent parts of the different figures have the same reference numerals so as to facilitate the passage from one figure to another.
    The different parts shown in the figures are not necessarily shown on a uniform scale, to make the figures more readable.
    In addition, in the description below, terms which depend on the orientation of the structure such as "front", "upper", "rear", "lower", "lateral", "central", "peripheral" apply considering that the structure is oriented as illustrated in the figures.
    DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS
    Reference is now made to FIG. 3 giving an example of assembly of solar cells 10i, 10 2 of contact type on the rear face RCC.
    The solar cells 10i, 10 2 , are formed from a semiconductor substrate, which can be poly or monocrystalline and in particular based on polycrystalline or monocrystalline silicon. Each of the cells has a face 2A before receiving light which is intended to be exposed to solar radiation R and a rear face 2B opposite the front face 2A.
    The solar cells 10i, 10 2 / of this assembly are as in the embodiment of FIG. 1, with contacts distributed essentially on the rear face 2B, of which one or more contacts (not shown in this figure) respectively or more N-type doped zones (in other words having a doping producing an excess of electrons) and one or more contacts (not shown in this figure) respectively with one or more P-type doped zones (in other words according to a doping consisting of produce an electron deficit), the N type zone or zones associated with the P type zone or zones forming at least one junction.
    The contacts in the doped zones distributed mainly on the side of the rear face 2B of the cells 10i, 10 2 , extend in particular over a central zone 21B of the rear face 2B. Opposite this central zone 21B, a central region 21A of the front face 2A is provided without contact, this central region 21B possibly being covered for example with a passivation layer.
    The contacts are respectively connected to, or form, at least one so-called "negative" electrode and at least one so-called "positive" electrode, depending on whether they are located on an N or P type doped area.
    The assembly is such that a peripheral region 22A (in the illustrated example corresponding to an upper right edge) situated on the front face 2A and outside the central region 21A of a first cell 10i is disposed against a peripheral zone 23B (in the example illustrated a lower left edge) of the rear face 2B of a second cell 10 2 .
    The solar cells 10i, 10 2 , are here assembled so as to overlap, which in particular makes it possible to produce a compact assembly.
    In addition to the assembly, the connection of the cells to each other is typically carried out in series so as to connect a negative electrode 13n of one cell 10i to a positive electrode 13p of another cell 10 2 .
    For this, a conductive element 12 at the peripheral region 22A of the front face 2A of the first cell 10i is connected to an electrode 13p, in this positive example, of said peripheral zone 23B located on the rear face 2B of said second cell 10 2 .
    To allow the conductive element 12 to be connected to the electrode 13n, in this negative example, located on the opposite face 2B of the first cell 10i, provision may be made, as in the connection example illustrated in FIGS. 4A -4B, a through connection element, in the form of a via or comprising a conductive via 151 made in the thickness of the cell. The via conductor 151 thus extends from the rear face 2B to the front face 2A of the cell.
    Alternatively (FIGS. 5A-5B), the connecting element between the conductive element 12 and the electrode 13n can be in the form or comprise a conductive strip 153 which extends on a lateral edge of the cell and connects the rear face 2B and the front face 2A of the cell.
    In order to produce a photovoltaic module, provision is typically made for implementing an assembly and interconnection of a larger number of cells.
    In the exemplary embodiments of FIGS. 6A-6B, and 7A-7B, a third cell 10 3 is arranged so that a peripheral zone 22B (in the example illustrated a lower right edge) of the rear face 2B of the second cell 10 2 is brought into contact with a peripheral region 23A (in the example illustrated an upper right edge) of the front face 2A of the third cell 10 3 .
    In addition to the way in which they are assembled, the connection of cells 10 2 , 10 3 to each other, is typically carried out so as to connect an electrode 13p, for example positive, of the third cell 10 3 to an electrode 13n, here negative, of the second cell 10 2 .
    For this, a conductive element 12 at a peripheral region 23A of the front face 2A of the third cell 10 3 is brought into contact with the electrode 13p of the peripheral zone 22B located on the rear face 2B of said second cell 10 2 . The conductive element 12 is itself connected to the electrode 13p located on the rear face 2B of the third cell 10 3 by means of a connection element provided with a conductive via 151 passing through the third cell 10 3 (Figures 6A-6B) or a conductive strip covering an edge of the third cell 10 3 (Figures 7A-7B).
    To produce such a type of joint between 10i cells 10 2/10 3 / it typically has the first and third cells 10 i 10 S 3 on a host surface and according to a predetermined spacing, and is tacked lower edges of the rear face of the second cell 10 2 on peripheral regions of the first cell and of the second cell respectively. This type of mounting has the advantage of being quick to implement. The second cell 10 2 located above the other cells 10i, 10 3 / is in no contact on its front face 2A and can even be devoid of conductive element on its front face.
    In the assembly example illustrated in FIGS. 8A-8B, a fourth cell 10 4 with contacts from the rear face is arranged by overlapping a peripheral zone 23B (here the lower left edge) of its rear face 2B with a peripheral zone 22A (here the upper right edge) of the front face 2A of the third cell 10 3 .
    According to an advantageous aspect, such an arrangement makes it possible to simultaneously have several solar cells 10 2 , 10 4 respectively on the cells 10i, 10 3 arranged on the receiving surface. It is thus possible to reduce the manufacturing time of a solar module capable of comprising a number of cells greater than 4. A particular embodiment of the module comprises an assembly of 72 cells.
    In the example illustrated in FIGS. 8A-8B, an assembly is obtained with several solar cells 10 2 , 10 4 located in the same plane called "upper" and several solar cells 10i, 10 3 located in the same plane called "lower" . The cells 10 2 , 10 4 located at the upper level are advantageously devoid of contact or conductive element on their front face 2A. This distribution on two planes also makes it possible to limit the overall height of the assembly.
    One or other of the assemblies described above can be produced in particular using contact cells on the rear face of the IBC type (IBC for "Interdigitated Back Contact"), including an example of arrangement of the rear faces and before is given respectively in FIGS. 9A, 9B.
    On the rear face (FIG. 9A) of such an IBC cell, the contacts 131, 132, with doped semiconductor zones of opposite types P and N are in the form of interdigitated metal fingers.
    One or more zones of positive electrodes 13p are arranged in contact with fingers 131 themselves in contact with at least one zone of type P. One or more zones of negative electrodes 13n are arranged in contact with fingers 132 themselves in contact at least one type N area.
    On the front face (FIG. 9B) of the IBC cell, conductive elements 12p, 12n respectively connected to the positive 13p and negative 13n electrodes are arranged on peripheral regions, near the edges of the front face. A central region with an area greater than the peripheral regions is itself devoid of conductive element or contact.
    In one or other of the examples of arrangements described above, a cell located in a plane called "upper" partially encroaches on a front face of a cell located in a plane called "lower".
    Also, in particular to allow a uniform production of electrical energy from one cell to another, it is possible to provide a particular arrangement with cells of different sizes, arranged so as to have sensitive areas exposed to the sun with identical or substantially identical surfaces. . By "substantially" is meant throughout the description which differs by less than 1%.
    An exemplary embodiment of such an arrangement is given in FIGS. 10A-10B respectively representative of a top view and of a cross-sectional view.
    In a given direction parallel to an x axis (axis of an orthogonal coordinate system [O; x; y; z]), cells 10 0 , 10 2 , 10 4 located in the same upper plane have a width Wa less than the width Wb of cells 10i, 10 3 , located in the same lower plane and on which cells 10 0 , 10 2 , 10 4 partially encroach.
    The overlap between the peripheral zone of the rear face of cells 10 0 , 10 2 , 10 4 of the upper plane, and the peripheral region of the front face of cells 10i, 10 3 , of the lower plane is advantageously provided so that the cells 10 0 , 10 2 , 10 4 of higher level and cells 10i, 10 3 , of lower level have respective central regions intended to be exposed to the sun of the same surface or substantially of the same surface.
    In the example illustrated, cells 10i, 10 3 / of lower level in particular have visible and unimpeded central regions (in other words not covered) of width Wa equal or substantially equal to that of cells 10 0 , 10 2 , 10 4 higher level. In such an arrangement, the overlapping length Δ between a cell and its neighboring cell can be provided for example such that Δ = (Wb-Wa) / 2.
    The cells of an assembly as described above are formed from a substrate which can itself result from the cutting of a support or a substrate into several parts or portions.
    In the embodiment illustrated in FIG. 11, a lower face of a support comprising the respective rear faces 2B of contact cells 131, 132 on the rear face is cut into two portions 100a, 100b, each portion being capable of forming an elementary cell. Such cutting is carried out for example using a laser. In this example, the electrodes and contacts on the rear face are produced prior to the cutting step, for example by screen printing, the electrodes and contacts can be deposited for example in the form of a conductive paste.
    In the embodiment illustrated in FIG. 12, provision is made for cutting an upper face of a different support comprising the respective front faces 2A of several cells in several portions 100c, 100d. Each portion is likely to form an elementary cell. One or more conductive elements 12 emerging from the front face are produced prior to cutting on peripheral regions or peripheral edges of the front face.
    After this cutting, the assembly is then carried out by typically affixing a conductive element 12 of the front face of a portion 100c or elementary cell cut out on an electrode 13p or 13n of the rear face of another portion 10 or elementary cell cut out.
    Another portion 100d totally devoid of contact or conductive element on its front face can also be used for mounting with another portion forming an elementary cell.
    The connection elements making it possible to electrically connect the front face and the rear face and in the form for example of one or more conductive strips on lateral edges or in the form of conductive vias can be produced after the cutting step.
    In the embodiment of Figures 13A-13B, a lower face (Figure 13A) and an upper face (Figure 13B) of a support intended to form several elementary cells of different widths Wb, Wa are shown before cutting the support in addition to two elementary portions 100a, 100b, 100c, 100d.
    In the embodiment of FIGS. 14A-14C (respectively giving a bottom view, a top view and a cross-sectional view), to form elementary cells, provision is made to cut a support 100 into portions or elementary cells of different widths Wb, Wa. Only the lower face (102B, FIG. 14A) of the support is provided with contacts 131, 132 and / or electrodes 13p, 13n. The upper face (102A, FIG. 14B) is itself without contact or electrode, or even without conductive element.
    An example of a method for manufacturing a solar module comprises, once the support 100 has been cut into several elementary cells 100A, 100B (FIG. 15A), a step of producing connection elements which make it possible to electrically connect the rear face. and the front of the cell. The connection elements are here provided with conductive strips 153 which extend on the lateral edges of an elementary cell 100B and encroach on the front face and the rear face of the cell. These conductive strips are produced for example by screen printing.
    The elementary cell 100B is then assembled with other solar cells. The cells can be assembled by welding or preferably by gluing, in particular by means of a conductive adhesive.
    In the assembly example of FIG. 15C, provision is made in particular to assemble the elementary cell 100B with other elementary cells 100A from the same support. The final assembly comprises a first plane PI or lower plane of cells, and a second plane P2 or upper plane, each provided with a plurality of solar cells. The cells of the second plane P2 here have a width Wa smaller than that Wb of the cells of the first plane PI, while the assembly seen from above (FIG. 15D) comprises regions intended to be exposed to the sun, of the same width Wa.
    The connection elements making it possible to electrically link the front face and the rear face can take different forms.
    In FIGS. 16A-16D, different forms of connection elements each provided with lateral conductive strips are shown. In addition to the lateral conductive strip which extends on the edge or on the lateral flank of a cell between its front face 2A (shown in these figures) and its rear face (not visible in these figures), the connection elements extend on the front face and on the rear face in the form of conductive zones which can have various configurations.
    For example, in the example of FIG. 16A, these conductive zones are conductive strips 154 arranged in the peripheral region of the front face or in the peripheral zone of the rear face and which extend over the entire length of the cell. . In the exemplary embodiment of FIG. 16B, these conductive zones are in the form of studs 155 arranged in the peripheral region of the front face or in the peripheral zone of the rear face and connected together by conductive strips 154 ′ of width more low.
    As a variant, provision may be made, as in the example in FIG. 16C, to extend the lateral conductive strips by separate conductive pads 155 arranged in the peripheral region of the front face or in the peripheral zone of the rear face.
    In the example of FIG. 16D, conductive pads 155 ′ of smaller size are provided distributed in the peripheral region of the front face or in the peripheral zone of the rear face near the longitudinal lateral edges of a cell.
    The shape of these conductive zones can be adapted as a function of the compromise which it is desired to achieve between the electrical performances in terms of resistance and ease of mounting.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    1. Structure comprising an assembly of a set of photovoltaic cells with contacts on the rear face, the contact cells on the rear face of said set each having:
    - a front face (2A) provided with at least one non-contact central region (21A) intended to be exposed to the sun,
    a rear face (2B), opposite to the front face, and comprising a central zone (21B) arranged opposite the central region of the front face, the central zone comprising one or more first contacts (131) respectively arranged on a or several first regions doped with N-type doping, and one or more second contacts (132) arranged respectively on one or more second regions doped with P-type doping, said assembly comprising a first cell (10i) connected to a second cell (10 2 ) of said assembly, said second cell being arranged so that a peripheral zone of the rear face of the second cell overlaps a peripheral region of the front face of the first cell, the first cell and the second cell being interconnected so that a first conductive element (22A) at said peripheral region of said first cell is connected to and is in contact with ct with a second conductive element (23B) of said peripheral zone of said second cell, the first cell being further provided with at least one connection element (151, 153) connecting the first conductive element (22A) to another element conductor (13B) located on a peripheral portion of the rear face of the first cell (101).
    [2" id="c-fr-0002]
    2. Structure according to claim 1, wherein the connection element comprises a via conductor (151) passing through the thickness of the first cell.
    S 64939 ALP-G
    [3" id="c-fr-0003]
    3. Structure according to claim 1, wherein the connection element comprises a conductive strip (153) which extends over a lateral edge of the first cell and connects the rear face and the front face of the first cell (10i).
    [4" id="c-fr-0004]
    4. Structure according to one of claims 1 to 3, in which the assembly comprises a third cell (IO3) with contacts on the rear face, the second cell (10 2 ) and the third cell being interconnected and partially overlapping, the the assembled structure being arranged so that another peripheral zone of the rear face of the second cell overlaps a peripheral region of the front face of the third cell.
    [5" id="c-fr-0005]
    5. Structure according to one of claims 1 to 4, wherein the assembly comprises another cell (lOo, IO4), said other cell being connected and partially overlapping the first cell (10i) the assembly being arranged so that 'a peripheral zone of the rear face of said other cell is in contact with another peripheral region of the front face of the first cell, or when the assembly comprises a third cell, said other cell being connected and partially overlapping the third cell (IO3), the assembly being arranged so that a peripheral zone of the rear face of said other cell is in contact with another peripheral region of the front face of the third cell.
    [6" id="c-fr-0006]
    6. Structure according to one of claims 1 to 5, in which in a given direction parallel to a main plane of the first cell and the second cell, the first cell has a first width Wb and the second cell has a second width Wa, such as Wb> Wa, the overlap between the peripheral region of the rear face of the second cell and the peripheral region of the front face of the first cell being provided so that the first cell and the second cell have central regions respective intended to be exposed to the sun of the same surface.
    S 64939 ALP-G
    [7" id="c-fr-0007]
    7. Structure according to one of claims 1 to 6, wherein said cells (10ο, 10i, IO2, IO3, IO4) with contacts on the rear face of said assembly are of IBC type, the first contacts and the second contacts being interdigitated.
    [8" id="c-fr-0008]
    8. Photovoltaic module comprising a structure according to one of claims 1 to 7.
    [9" id="c-fr-0009]
    9. Method for producing a structure according to one of claims 1 to 7, comprising at least one step of cutting into several portions of a support comprising several contact cells on the rear face, said at least one support having one face upper surface on which the respective front faces of a plurality of rear contact cells are arranged, and a lower surface on which the respective rear faces of the cells of said rear rear contact cells are arranged.
    [10" id="c-fr-0010]
    10. The method of claim 9, wherein said first cell (10i) and said second cell (IO2) result from said cutting into several portions of said support.
    [11" id="c-fr-0011]
    11. Method according to one of claims 9 or 10, wherein the cutting of said support is carried out in different portions of different surfaces corresponding respectively to cells of said plurality of cells having front faces of different surfaces.
    [12" id="c-fr-0012]
    12. The method of claim 11, wherein said cutting of said at least one support is carried out in at least two portions having a first surface and having at least two other portions having a second different surface less than the first surface.
    S 64939 ALP-G
    [13" id="c-fr-0013]
    13. Method for producing a structure according to one of claims 1 to 7, in which the assembled structure results from at least one assembly step between the first cell, the second cell and at least a third cell, l '' assembly step comprising:
    5 a) place the first cell and the second cell on a receiving surface and according to a determined spacing, then
    b) placing a peripheral zone of the second cell on peripheral regions of the first cell and of the second cell respectively.
    10
    [14" id="c-fr-0014]
    14. The method of claim 13, wherein in step b) there is concomitantly a peripheral zone of a rear face of another cell on another peripheral region of the first cell or of the third cell.
    [15" id="c-fr-0015]
    15. Method according to one of claims 13 or 14, wherein said
    15 first cell and / or the second cell results from said cutting into several portions of a support and in which after cutting said support into several portions and prior to assembly, at least one conductive strip is formed on at least a lateral edge of said first cell and / or on at least one lateral edge of said second cell.
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    同族专利:
    公开号 | 公开日
    EP3598506A1|2020-01-22|
    FR3084206B1|2021-05-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20180108796A1|2016-10-18|2018-04-19|Solarcity Corporation|Cascaded photovoltaic structures with interdigitated back contacts|
    JPWO2020071083A1|2018-10-02|2021-09-02|株式会社カネカ|Solar cell devices and solar cell modules|
    CN112771679A|2018-12-12|2021-05-07|株式会社钟化|Solar cell device and solar cell module|
    法律状态:
    2019-07-31| PLFP| Fee payment|Year of fee payment: 2 |
    2020-01-24| PLSC| Search report ready|Effective date: 20200124 |
    2020-07-31| PLFP| Fee payment|Year of fee payment: 3 |
    2021-07-29| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1856657A|FR3084206B1|2018-07-18|2018-07-18|IMPROVED ASSEMBLY OF SOLAR CELLS WITH REAR FACE CONTACTS|FR1856657A| FR3084206B1|2018-07-18|2018-07-18|IMPROVED ASSEMBLY OF SOLAR CELLS WITH REAR FACE CONTACTS|
    EP19186516.1A| EP3598506A1|2018-07-18|2019-07-16|Improved assembly of solar cells with contacts on the rear surface|
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