• 专利附录
  • 专利说明
  • 权利要求
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    • 专利摘要:
    The invention relates to a method of manufacturing a photovoltaic module, comprising: - the supply of a plurality of bifacial photovoltaic cells each having a short circuit current ratio (B), - the asymmetrical cut of each cell in two portions, such that the ratio between the areas of said portions is substantially equal to the short circuit current ratio (B) of said cell or the average short-circuit ratio of all the cells, - the juxtaposition of said portions. of cells in a main plane of the module to form pairs of selected cell portions such that the front face of the first portion has a short-circuit current substantially equal to the short-circuit current of the rear face of the second portion. portion, said portions being arranged so that the front face of the first portion and the rear face of the second portion coincide with the front face of the module - The creation of an electrical connection of the front face of the first portion with the rear face of the second portion.
    公开号:FR3024283A1
    申请号:FR1457200
    申请日:2014-07-25
    公开日:2016-01-29
    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:

    [0001] FIELD OF THE INVENTION The present invention relates to a photovoltaic module comprising a plurality of bifacial photovoltaic cells and a method of manufacturing such a module. BACKGROUND OF THE INVENTION In a photovoltaic module, the photovoltaic cells can be connected in series by means of an electrically conductive element, such as a copper ribbon, which connects the front face of a cell to the back face of the cell. the adjacent cell. In such a module, the front face of the different cells is located on the same side, forming the front face of the module, and the rear face is located on the opposite side, forming the rear face of the module. FIG. 1 illustrates this so-called "standard" interconnection mode in a partial sectional view of a module comprising cells C1, C2, C3. The front of the cells is designated by the AV mark, the back side is designated by the AR mark.
    [0002] To connect the front face of the cell C1 to the rear face of the cell C2, the copper ribbon 1 is not flat but passes through the module from the front face to the rear face. Once the different cells are connected by means of ribbons 1, 1 ', etc. they are encapsulated in an encapsulating material 2 and laminated between two glass plates 3, 3 ', or between a glass plate on the front face and a backside polymer plate (said polymer may or may not be transparent depending on whether the module is monofacial or bifacial). The crossing of the ribbon from the front face to the rear face requires deformation of the ribbon which is likely to create mechanical stresses in the ribbon, promoting chemical corrosion or mechanical fatigue of said ribbon and thus causing electrical failures (rupture of the interconnections ) or mechanical (cracking) of said module. This interconnection mode applies to both monofacial cells (that is to say one of the main faces is photoactive) and bifacial cells (whose two main faces are photoactive). Such bifacial cells can be obtained by metallising only locally the back side of a conventional cell, for example in the form of a grid or in any other form.
    [0003] In the case of a module comprising bifacial cells, another possible interconnection mode is a so-called "monolithic" interconnection, shown diagrammatically in FIG. 2. The same reference numerals as in FIG. 1 designate the same elements as FIG. those already described with reference to this figure. In this interconnection mode, the cells are arranged according to the polarity + and connections connecting the front face AV of a cell and the rear face AR of the adjacent cell. This makes it possible to use a copper ribbon 1, 1 'to connect respectively the front face 10 of the cell C1 to the rear face of the adjacent cell C2, on the front face of the module, and the front face of the cell C2 on the back of the adjacent C3 cell, on the back of the module. Such an interconnection mode is described for example in the patent DD 135 014. The monolithic interconnection has the advantage of allowing all the cells of the module to be connected simultaneously, unlike the standard interconnection mode which comprises a plurality of steps, the cells being successively connected to each other. The method of manufacturing the module is further simplified by the fact that no prior deformation of the copper ribbons is necessary.
    [0004] FIGS. 3A and 3B schematically illustrate the interconnection sequence of the cells respectively in the case of a standard interconnection and a monolithic interconnection. In the case of a standard interconnection (FIG. 3A), due to the conformation of the copper ribbon, a cell can only be assembled when the copper ribbon has been connected to the adjacent cell. The assembly therefore requires a succession of steps E1, E2, E3, etc. until all cells have been connected. In the case of a monolithic interconnection (FIG. 3B), the assembly is made in a single step, two series of copper ribbons (one on the side of the front face of the module, the other on the side of the face rear of the module) being simultaneously connected to the corresponding faces of the cells. Another advantage of the monolithic interconnection is that it minimizes the stresses in the copper ribbons and thus limits the risks of failure associated with said ribbons. Yet another advantage of the monolithic interconnect is that the spacing of the cells can be minimized. Indeed, in the standard interconnection, a certain spacing of the cells is necessary to allow the crossing of the copper ribbon from the front face to the rear face. Such spacing is greatly reduced, thus increasing the surface efficiency (W / m2) of the module, in the case of a monolithic interconnection. It is further known that the bifacial photovoltaic cells have a different conversion efficiency between the front face and the back face. This difference is due on the one hand to the physical properties of the material forming the cell and, on the other hand, to the presence of a denser metallization on the side of the rear face than on the side of the front face. This difference can also result from the choice to optimize the performance of one of the two faces to the detriment of the other. FIG. 4 illustrates, by way of example, the conversion efficiency R ("Internal Quantum Efficiency" according to the English terminology) of the front face (curve a) and the back face (curve b) of a bifacial cell. according to the wavelength λ. Generally, on the bifacial cells presently on the market, the ratio between the conversion efficiency between the front face and the back face is of the order of 70% to 95%.
    [0005] In a photovoltaic module comprising a plurality of cells, the electric current generated depends on the cell that produces the least current. Therefore, in a monolithic arrangement as described above, the electric current produced by the module is only 70 to 95% of the current that would have been produced by the module if it had been assembled according to the mode of 20 standard interconnection. BRIEF DESCRIPTION OF THE INVENTION An object of the invention is therefore to design a photovoltaic module that can be assembled in a monolithic manner and whose electric current generation is maximal. According to the invention, there is provided a method of manufacturing a photovoltaic module having a front face intended to be exposed to solar radiation, said method comprising at least the following steps: - the supply of a plurality of bifacial photovoltaic cells each having a short-circuit current ratio defined for each cell as the ratio of: - the short-circuit current generated when the rear face of said bifacial photovoltaic cell is illuminated and - the short-circuit current circuit generated when the front face of said cell is illuminated, - the asymmetrical cutting of each cell into a first and a second portion, so that the ratio between the areas of said portions is substantially equal to the ratio (B) of short circuit current of said cell or the average short-circuit ratio of all the cells, - the juxtaposition of the ites portions of cells in a main plane of the module to form pairs of selected cell portions so that the front face of the first portion has a short-circuit current substantially equal to the short-circuit current of the rear face of the second portion, said portions being arranged so that the front face of the first portion and the rear face of the second portion coincide with the front face of the module, - the creation of an electrical connection of the front face of the first portion; portion with 10 the back side of the second portion. The short-circuit current ratio of said cells is typically strictly less than 1. By "a current substantially equal to the short-circuit current" is meant a current within a range of ± 2% with respect to the short-circuit current. preferably in a range of ± 1% with respect to this stream and more preferably in a substantially zero range around this stream. According to one embodiment, the short-circuit current ratio in which each cell is cut is the short-circuit current ratio specific to said cell. Alternatively, the short-circuit current ratio in which each cell is cut is the average short-circuit current ratio of all the cells. According to one embodiment of the invention, the asymmetrical cutting step is followed by a symmetrical cutting step of each of the first and second portions, in the direction of the width or in the direction of the length of said portions. The electrical connection between two cell portions is typically made by a ribbon of electrically conductive material. In a particularly advantageous manner, said ribbon extends in a plane. The method further comprises: - juxtaposing the portions of all the cells in a main plane of the module, - creating simultaneous electrical connections between the portions of the same cell and between the portions of adjacent cells. Another object relates to a photovoltaic module that can be obtained by such a method. Said module has a front face intended to be exposed to solar radiation and comprises a plurality of asymmetric bifacial photovoltaic cell portions juxtaposed in pairs, in which, for each pair: the front face of the first portion and the rear face of the second portion coincide with the front face of the module, the front face of the first portion is electrically connected with the rear face of the second portion, and the front face of the second portion is electrically connected with the rear face of the first portion; portion of an adjacent pair, the short circuit current of the front face of the first portion is substantially equal to the short circuit current of the rear face of the second portion. The electrical connection between two cell portions is made by a ribbon of an electrically conductive material. In a particularly advantageous manner, said ribbon extends in a plane.
    [0006] BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will emerge from the detailed description which follows, with reference to the accompanying drawings in which: - Figure 1 is a sectional view of a portion of an assembled module According to a standard interconnection mode, FIG. 2 is a sectional view of a part of a module assembled according to a monolithic interconnection mode, FIGS. 3A and 3B schematically illustrate respectively the steps of the method of FIG. standard interconnection and the monolithic interconnection method; FIG. 4 illustrates the performance of the front face (curve a) and of the rear face 20 (curve b) of a bifacial photovoltaic cell; FIG. 5 illustrates the principle of cutting of a cell taking into account the short-circuit current ratio in accordance with the invention; FIG. 6A illustrates an example of assembly of the cell portions in module according to the invention, the view presented in FIG. prior to that of the front face of said module, FIG. 6B illustrates an example of assembly of module-symmetrical cell portions not covered by the present invention; FIG. 7 is a graph showing the maximum power gain (FIG. Pmax) and short-circuit current (lsc) as a function of the illumination for a photovoltaic module according to the invention, - FIGS. 8A and 8B illustrate variants of cutting of a bifacial cell taking account of the current ratio. According to the invention, FIGS. 9A and 9B respectively illustrate the cutting of each bifacial cell according to the short circuit current ratio which is specific to it and the assembly of the portions of said cells, FIGS. 10A. at 10C schematically present the principles of connection of the bifacial cells respectively with the standard connections, with the monolithic connections with bifacial cells of identical surfaces and with cells Asymmetrical bifacial s according to the invention.
    [0007] DETAILED DESCRIPTION OF THE INVENTION The method of manufacturing a photovoltaic module comprises the successive steps described hereinafter. The photovoltaic module is intended to be made by monolithic assembly of a plurality of bifacial cells. Said photovoltaic module has a front face and a rear face. In a first step, from a batch of bifacial cells intended to form the module, the short-circuit current (denoted lsc, expressed in mA) is determined for each of the faces of the cell. By convention, the front face (FAV) of the cell is the face of the cell for which the short circuit current lsc is the largest and the rear face (FAR) of the cell is that for which the short current -circuit is the smaller of the two measured. From these measurements, the ratio B of short-circuit current between the rear face and the front face is deduced. By way of example, Table 1 below illustrates the properties of the front and rear faces of a batch of nine cells. The variable Voc is the voltage of the open circuit (in V), Pmax is the maximum power supplied and FF is the form factor. The last column of Table 1 shows the ratio B between the short-circuit current of the rear face and the short-circuit current of the front face.
    [0008] Table 1: FAV Cell FAR Ratio lsc FAR / FAV lsc Pmax Voc FF% lsc Pmax Voc FF% 12 9486 4793 647 78.085 8536 4307.7 634.7 78.39 89.98% 14 9420 4733.9 646.2 77 , 76 8497 4291.7 643.4 78.50 90.20% 15 9398 4753.1 646.7 78.20 8493 4286.6 643.7 78.90 90.37% 16 9397 4758.4 645.5 78 , 44 8428 4283.0 642.5 79.10 89.69% 17 9365 4747.8 645.7 78.55 8349 4236.5 642.3 79.0 89.15% 18 9427 4810.8 644.8 79 , 14 8373 4248.5 640.7 79.3 88.82% 19 9450 4757.4 646.5 77.87 8429 4251.5 643.2 78.4 89.19% 20 9429 4762.4 645.7 78 , 2 8443 4264.8 642.9 78.6 89.54% 22 9455 4736.0 646.0 77.5 8378 4239.7 642.8 78.7 88.61% For this batch of cells, the arithmetic mean ratios of the short-circuit currents between the rear face and the front face - or average ratio of Isc - is equal to 89.50%. According to one embodiment, each cell is then cut into two portions 25 asymmetrically while respecting this average ratio of Isc, that is to say, by making sure that the ratio of the areas of the two portions of each cell is equal to the ratio B.
    [0009] For example, as illustrated in FIG. 5, each cell C has a rectangular shape of length L. Each cell C is cut in the direction of width into two portions CA, CB of respective lengths LA and LB, the ratio LA / LB being equal to the average ratio of the short-circuit currents, ie 89.44%, and the sum LA + LB being equal to the length L of the cell. The two cell portions CA, CB are therefore not symmetrical with respect to the section line indicated in dashed lines. With reference to FIG. 6A, the cut-off cell portions are then assembled according to the principle explained above to form the module. In the example shown in FIG. 6A, cells 12, 14, 15, 16 and 17 of Table 1 were assembled to form the module. For this purpose, it ensures that the portions from the same cell are adjacent, the portion having the smallest area (designated by the number of the cell from which it is derived followed by the letter A) being oriented such so that its front face 15 coincides with the front face of the module, while the portion having the largest area (designated by the number of the cell from which it is derived followed by the letter B) is oriented so that its face backward coincides with the front of the module. An electrical connection is made on the one hand between the portions of the cell and on the other hand between cells. For example, as illustrated in FIG. 6A, two portions of the same cell are connected to the front face of the module (which is the visible face in this figure) by means of three parallel electrically conductive strips, and two portions of two adjacent cells are connected to the rear face of the module by means of three parallel electrically conductive strips. Each of said ribbons thus extends either in the plane of the front face or in the plane of the rear face of the module. It is therefore a monolithic assembly. An advantage of such an assembly is that it makes it possible to simultaneously connect the different portions of bifacial cells, which makes the assembly process simpler and faster. In addition, by avoiding the crossing of the conductive strips between the front face and the rear face of the module, this construction is also more robust and limits the failures due to the conductive strips. Naturally, it will be possible to modify the number and the dimensions of said ribbons without departing from the scope of the present invention. Then, the manufacturing of the module is finalized by sandwiching the cell portions thus connected between two sheets of encapsulating material and laminating the assembly between two plates forming the front and rear faces of the module. The front and back plates may be glass and / or polymer. This last step is known in itself and therefore does not require a detailed description.
    [0010] In such a module, the fact that the short-circuit current of the cell is greater in the front face is compensated by the fact that the area of the cell portion whose front face is exposed (portion 12A for example) is smaller, while the fact that the short-circuit current is lower on the back face is compensated by the fact that the area of the cell portion whose rear face is exposed (portion 12B for example) is larger . Preferably, the module thus formed is a monofacial module rather than bifacial. Indeed, the cutting and the arrangement of the cell portions improves the electrical performance of the front panel module but tends to degrade the rear panel.
    [0011] Thus, if one is only interested in the front face of the module, the short-circuit current is substantially equal from one portion to another for the same cell. This is illustrated in Table 2 below, which shows the short circuit current for the front and rear faces of each cell portion. Table 2: Portion of FAV FAR cell lsc lsc 12A 4621 4159 12B 5206 4637 14A 4603 4151 14B 5178 4674 15A 4591 4120 15B 5148 4590 16A 4576 4097 17B 5108 4535 Note that within the batch of cells presented above, The inventor has chosen to match the front face 16A of the cell 16 with the rear face 17B of the cell 17, in order to obtain near short-circuit currents. In this particular case, the values of the short-circuit currents of the portions 16B and 17A of the cells 16 and 17 were unsatisfactory and these two cell portions were therefore discarded. More generally, it will be noted that it is not necessary to match portions from the same cell to implement the invention. It is indeed quite possible to form pairs of cell portions based solely on the Isc values of the front and back faces of said portions and by associating the portions with the nearest Isc values to one of the other. For this set of asymmetrically cut cell portions, the minimum short-circuit current is 4576 mA for the front-exposed portions and 4535 mA for the back-face portions. Since these two minima are substantially equal, this means that the performance of the module will not be significantly affected by short-circuit current differences between cell portions.
    [0012] For comparison, shown in Figure 6B, the cells 18, 19, 20 and 22 have been cut symmetrically, i.e. the lengths of each portion are identical. In other words, the areas of the two portions of each cell are identical. Such a symmetrical cutting mode, which is excluded from the present invention, is disclosed in EP 1 770 791 which also relates to a monolithic interconnection method. In this case, the cut is used to facilitate the setting of the cells in a module. Indeed, hexagonal cells are cut into four identical portions and said parts are arranged along their respective oblique face so as to form rectangles. The interconnections of the cells thus arranged are then interconnected. To form the module, each cell portion designated by the letter A is oriented with its front face coinciding with the front face of the module and each cell portion designated by the letter B is oriented with its rear face coinciding with the front face of the module .
    [0013] Table 3 below shows the short-circuit current for the front and rear faces of each cell portion. Table 3: Portion of FAV FAR cell lsc lsc 18A 4803 4310 18B 4808 4283 19A 4831 4312 19B 4864 4342 20A 4843 4329 20B 4838 4343 22A 4834 4292 22B 4859 4292 For each cell, there is therefore a significant difference between the current of 25 short -circuit of the front face of a portion and the short circuit current of the rear face of the other portion (the latter being oriented on the front side of the module).
    [0014] Indeed, in this example, the minimum short-circuit current is 4804 mA for the portions whose front face is exposed and 4284 mA for the portions whose rear face is exposed, a difference of more than 500 my. That is, even if the portions of which the front face is exposed have a high short circuit current, the performance of the module will be conditioned by the portion of which the rear face is exposed and which has the shortest circuit current. low. Figure 7 illustrates the short-circuit current (lsc) and maximum power (Pmax) gain for the module illustrated in Figure 6A. There is a gain in Pmax of the order of + 1.5% for this module.
    [0015] The embodiment described above provides for cutting each cell into two portions in the width direction. However, it is possible to provide other modes of cutting the cells (in terms of number of portions and / or direction of cut portions) without departing from the scope of the present invention. As a general rule, the number of cell portions is even, which makes it possible to match the front face of a portion and the back face of another portion of the same cell or of another cell, while retaining substantially the same total area for all pairs of cell portions. Thus, FIG. 8A illustrates an alternative embodiment in which a cell (illustrated in the left-hand part of the figure) is successively cut into two portions in the width direction asymmetrically (i.e. respecting the ratio LA / LB = B as taught above) and then in the direction of its length symmetrically (central portion of Figure 8A). As illustrated in the right-hand part of FIG. 8A, four cell portions are thus obtained.
    [0016] FIG. 8B illustrates another alternative embodiment in which a cell (illustrated in the left-hand part of the figure) is cut in two portions in the width direction asymmetrically (i.e. ratio LA / LB = B as taught above), then each portion is again cut in two in the same direction, symmetrically. As illustrated in the right-hand part of FIG. 8B, four cell portions are thus obtained, two having a length LA / 2 and two having a length LB / 2. In the two embodiments described above, a first asymmetrical cutting operation is performed according to the ratios B, and then it is followed by a symmetrical cutting operation, either in length or in width. These embodiments make it possible to reduce the current of each "string" of cell portions and thus to limit current losses by Joule effect. It will be recalled that a string of cells conventionally corresponds to a unit of cells connected in series. In a standard module, a string has about ten cells and the strings are interconnected with each other. Moreover, the invention does not require that the cells be cut asymmetrically while respecting the same ratio B for all the cells, corresponding to the average ratio of all the cells. According to one embodiment of the invention, the ratio B is determined for each cell and said cell is cut in accordance with the respective ratio B. As illustrated in FIG. 9A, three cells C1, C2, C3 with different short-circuit current ratios are considered. Cut the cell C1 in two portions in the direction of the width, so that the ratio LA1 / LB1 is equal to the ratio B for this cell; the cell C2 is cut in two portions in the direction of the width, so that the ratio LA2 / LB2 is equal to the ratio B for this cell; finally, the C3 cell is cut in two portions in the width direction, so that the ratio LA3 / LB3 is equal to the ratio B for this cell.
    [0017] Figure 9B illustrates the connection of the portions of said cells to form a module. The portions LAS, LA2 and LA3 having the smallest area are arranged so that their front face coincides with the front face of the module, while the portions LB ~, LB2 and LB3 having the largest area are arranged so that their rear face coincides with the front face of the module. An electrical connection 1, 1 ", 1 is made between the portions of each pair (Lm, LB1), (LA2, LB2) and (LA3, LB3) at the front of the module and an electrical connection 1 ', 1 is made between adjacent portions of two different pairs at the rear face of the module, each of these connections being made by a flat ribbon of an electrically conductive material, which embodiment has the advantage of optimizing the cutting of each cell, since the cutting ratio depends specifically on the ratio B of said cell, Figures 10A to 10C illustrate the advantages of the monolithic connection with bifacial cells according to the invention (illustrated in FIG. to the standard connectors with bifacial cells (illustrated in FIG. 10A) and with respect to the monolithic connectors with bifacial cells of identical areas (illustrated in FIG. 10B). 10A, bifacial cells C1, C2, C3 are arranged successively, the front faces AV of each of these cells being coplanar and forming the front face of the module. The rear faces AR of each of these cells are coplanar and form the rear face of the module. The front face of a cell is electrically connected to the rear face of the adjacent cell by means of an electrically conductive strip 1, 1 '.
    [0018] In order to facilitate the passage of said conductor ribbon from the front face of a cell to the rear face of the adjacent cell, a sufficiently large distance d is provided between two adjacent cells. For example, the distance d is typically of the order of 2 to 4 mm.
    [0019] Referring to FIG. 10B, bifacial cells C1, C2, C3 each having an identical length L, are successively arranged, the front face AV of the cell C1 being coplanar with the rear face AR of the adjacent cell C2 on the side of the front face of the module and an electrical connection being provided between these two coplanar faces by means of an electrically conductive strip 1. The front face AV of the cell C2 is coplanar with the rear face AV of the adjacent cell C3, on the side the rear face of the module, and an electrical connection being provided between these two coplanar faces by means of an electrically conductive tape 1 '. In other words, the front face of the module alternately comprises the front face of a cell and the rear face of an adjacent cell.
    [0020] Since the conductor strips 1, 1 'each extend in one plane, the distance between two adjacent cells may be less than the distance d provided for the standard connectors. This inter-cell distance can typically be of the order of 1 mm. Referring to FIG. 10C, which illustrates one embodiment of the invention, bifacial cells C1, C2, C3 each having an identical length L, are successively arranged in pairs. Within the pair C1, C2, the front face AV of the cell C1 is coplanar with the rear face AR of the adjacent cell C2 on the side of the front face of the module and an electrical connection is ensured between these two coplanar faces by means of As explained above, the length L1 of the cell C1 and the length L2 of the cell C2 obey the relationship: L1 / L2 = B, where B is the ratio of Isc. The front face AV of the cell C2 is coplanar with the rear face AV of the adjacent cell C3, which belongs to another pair of cells, on the side of the rear face of the module, and an electrical connection is provided between these two coplanar faces. by means of an electrically conductive tape 1 '.
    [0021] The ratio between the surface yield of the monolithic connector according to the invention (FIG. 10C) and the surface yield of the standard connector (FIG. 10A) is equal to: 2B / (1 + B). This ratio is less than 1, which means that the surface efficiency of the module according to the invention is lower (of the order of -5% if B = 90%) than that of a module with standard connections. On the other hand, the module according to the invention benefits from an easier and faster assembly process, and is less subject to electrical and mechanical failures of the conductive ribbons. On the other hand, as shown below, the module according to the invention allows a smaller spacing between cell portions. This represents a gain of about 1.3% for cells of size 156 mm * 156 mm. Indeed, a standard spacing of 4 mm is considered for cells of 156 mm. Since the invention uses cut cells (on the order of 78 mm) and spacing of 1 mm, the gain is (156 +4) / (2 * (78 + 1)) = 160/158 = 1.013 or 1.3 %) The ratio between the surface yield of the monolithic connectors according to the invention (FIG. 10C) and the surface yield of the symmetrical-cell monolithic connector (FIG. 10B) is equal to: 2 / (1 + B). This ratio is greater than 1, which means that the surface yield of the module according to the invention is higher (of the order of + 5% if B = 90%) than that of a module with a monolithic connection to 10 symmetrical cells. The relative loss AR (in%) of the surface yield related to the spacing of the cells is given by the formula: AR = d / L * 100%. With a monolithic module, the distance d between cells can be reduced to 1 mm, which represents a distance reduction of 1 to 3 mm compared to the distance between cells with standard connectors. If cells of length L = 156 mm are considered, the relative gain in efficiency is between 1/156 and 3/156 for the symmetrical monolithic module of FIG. 10B, namely between 0.6% and 2%. For the asymmetrical monolithic module according to the invention (FIG. 10C), the cut cells have a length of approximately 78 mm, hence a maximum gain of 1.3% as explained above. REFERENCES DD 135 014 EP 1 770 791 25
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. A method of manufacturing a photovoltaic module having a front face to be exposed to solar radiation, said method comprising at least the following steps: - providing a plurality of bifacial photovoltaic cells each having a ratio (B) of current of short circuit, said ratio (B) being defined, for each cell, as being the ratio between: - the short-circuit current (lsc) generated when the rear face (AR) of said bifacial photovoltaic cell is illuminated and - the short-circuit current generated when the front face (AV) of said cell is illuminated, - the asymmetrical cutting of each cell in a first and a second portion, so that the ratio between the areas of said portions is substantially equal to the ratio (B) short circuit current of said cell or the average short-circuit ratio of all the cells, - the juxtaposition of said cellu portions. them in a main plane of the module to form pairs of selected cell portions so that the front face of the first portion has a short-circuit current substantially equal to the short circuit current of the rear face of the second portion , said portions being arranged so that the front face of the first portion and the rear face of the second portion coincide with the front face of the module, - the creation of an electrical connection of the front face of the first portion with the face back of the second portion. 25
    [0002]
    The method of claim 1, wherein the short circuit current ratio in which each cell is cut is the short circuit current ratio specific to said cell. 30
    [0003]
    3. The method of claim 1, wherein the short circuit current ratio in which each cell is cut is the average short circuit current ratio of all cells.
    [0004]
    4. Method according to one of claims 1 to 3, wherein the asymmetrical cutting step 35 is followed by a symmetrical cutting step of each of the first and second portions, in the width direction or in the direction of the length of said portions. 3024283 15
    [0005]
    5. Method according to one of claims 1 to 4, wherein the electrical connection between two cell portions is made by a ribbon of an electrically conductive material. 5
    [0006]
    The method of claim 5, wherein said ribbon extends in a plane.
    [0007]
    7. Method according to one of claims 5 or 6, comprising: - the juxtaposition of the portions of all the cells in a main plane of the module, 10 - the simultaneous creation of electrical connections between the portions of the same cell and between the portions of adjacent cells.
    [0008]
    Photovoltaic module having a front face intended to be exposed to solar radiation, comprising a plurality of asymmetric bifacial photovoltaic cell portions juxtaposed in pairs, in which, for each pair: the front face of the first portion and the rear face of the second portion coincide with the front face of the module, - the front face of the first portion is electrically connected with the rear face of the second portion, and the front face of the second portion is electrically connected with the rear face of the second portion; first portion of an adjacent pair, - the short circuit current of the front face of the first portion is substantially equal to the short circuit current of the rear face of the second portion.
    [0009]
    9. Module according to claim 8, wherein the electrical connection between two cell portions is made by a ribbon of an electrically conductive material.
    [0010]
    The module of claim 9, wherein said ribbon extends in a plane.
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    同族专利:
    公开号 | 公开日
    CN106537609B|2018-05-04|
    EP3172769B1|2019-02-27|
    CN106537609A|2017-03-22|
    US10693026B2|2020-06-23|
    FR3024283B1|2016-08-12|
    WO2016012626A1|2016-01-28|
    US20170236963A1|2017-08-17|
    EP3172769A1|2017-05-31|
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    2021-04-09| ST| Notification of lapse|Effective date: 20210305 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1457200A|FR3024283B1|2014-07-25|2014-07-25|PHOTOVOLTAIC MODULE COMPRISING A PLURALITY OF BIFACIAL CELLS AND METHOD OF MANUFACTURING SUCH A MODULE|FR1457200A| FR3024283B1|2014-07-25|2014-07-25|PHOTOVOLTAIC MODULE COMPRISING A PLURALITY OF BIFACIAL CELLS AND METHOD OF MANUFACTURING SUCH A MODULE|
    US15/327,444| US10693026B2|2014-07-25|2015-07-27|Photovoltaic module comprising a plurality of bifacial cells and method for producing such a module|
    EP15741565.4A| EP3172769B1|2014-07-25|2015-07-27|Photovoltaic module comprising a plurality of bifacial cells and method for producing such a module|
    PCT/EP2015/067118| WO2016012626A1|2014-07-25|2015-07-27|Photovoltaic module comprising a plurality of bifacial cells and method for producing such a module|
    CN201580040989.1A| CN106537609B|2014-07-25|2015-07-27|Photovoltaic module including multiple double-side cells and the method for manufacturing the module|
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