Photovoltaic module and preparation method thereof

Abstract

The invention discloses a photovoltaic module and a preparation method thereof, and belongs to the technical field of photovoltaic modules. The photovoltaic module comprises a battery piece, and the battery piece is provided with a first surface and a second surface which are oppositely arranged. The first electric connecting piece, the second electric connecting piece and the third electric connecting piece extend in the first direction, are sequentially and adjacently arranged at intervals in the second direction and are connected to the first surface of the battery piece, and the first electric connecting piece, the second electric connecting piece and the third electric connecting piece are sequentially and adjacently arranged at intervals in the second direction. A first distance is formed between the first electric connecting piece and the second electric connecting piece, a second distance is formed between the second electric connecting piece and the third electric connecting piece, and the first distance is smaller than the second distance; the first strip extends in the first direction, and the first strip covers the sides, away from the battery piece, of the first electric connecting piece and the second electric connecting piece; wherein the second direction intersects with the first direction.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic modules, and in particular to a photovoltaic module and a method for preparing the photovoltaic module. Background Art

[0002] The back-contact photovoltaic module includes a battery cell and positive and negative electrode welding strips connected to the back of the battery cell, so as to collect the current generated by the battery cell through the positive and negative electrode welding strips to prevent the positive and negative electrode welding strips from blocking the front of the battery cell, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0003] A photovoltaic module is disclosed in the prior art, and the photovoltaic module also includes an adhesive film, which covers the side of the positive electrode welding strip away from the battery cell, so that the positive electrode welding strip is bonded to the back of the battery cell through the adhesive film. Alternatively, the adhesive film covers the side of the negative electrode welding strip away from the battery cell, so that the negative electrode welding strip is bonded to the back of the battery cell through the adhesive film. That is, in the prior art, each adhesive film is arranged corresponding to a positive electrode welding strip or a negative electrode welding strip, so that a positive electrode welding strip or a negative electrode welding strip is bonded to the back of the battery cell through an adhesive film.

[0004] However, the above method has the problem that the fixing force between the soldering ribbon and the battery cell is insufficient, resulting in poor contact between the soldering ribbon and the battery cell, waste of adhesive film, and other problems, which affects the photoelectric conversion efficiency of the photovoltaic module. Summary of the invention

[0005] The present application discloses a photovoltaic module and a method for preparing the photovoltaic module, in order to solve or at least partially solve the problem existing in the prior art that the fixing force between the soldering ribbon and the battery cell is insufficient, resulting in poor contact between the soldering ribbon and the battery cell, affecting the photoelectric conversion efficiency of the photovoltaic module and wasting the adhesive film.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, the present application discloses a photovoltaic module, which includes a battery cell, wherein the battery cell has a first surface and a second surface arranged opposite to each other; a first electrical connector, a second electrical connector and a third electrical connector, wherein the first electrical connector, the second electrical connector and the third electrical connector all extend along a first direction and are arranged adjacent to each other and at intervals in sequence along a second direction, wherein the first electrical connector, the second electrical connector and the third electrical connector are all connected to the first surface of the battery cell, and along the second direction, there is a first distance between the first electrical connector and the second electrical connector, and a second distance between the second electrical connector and the third electrical connector, and the first distance is smaller than the second distance; a first strip, wherein the first strip extends along the first direction and covers a side of the first electrical connector and the second electrical connector away from the battery cell; wherein the second direction intersects with the first direction.

[0008] Optionally, the first strip covers the end of the first electrical connector connected to the first surface of the battery cell; the first strip covers the end of the second electrical connector connected to the first surface of the battery cell.

[0009] Optionally, along the second direction, a first distance between the first electrical connector and the second electrical connector is D1, satisfying D1≥0.5 mm.

[0010] Optionally, along the first direction, the battery cell has a first side and a second side that are opposite to each other, a third distance S1 is between the end of the first strip close to the first side and the first side, and a fourth distance S2 is between the end of the second strip close to the second side and the second side, satisfying 1.5mm≤S1≤5mm; 1.5mm≤S2≤5mm.

[0011] Optionally, S1=S2 is satisfied.

[0012] Optionally, along the second direction, the first strip has a third side and a fourth side that are relatively arranged, and a side of the first electrical connector close to the third side has a fifth distance W1 from the third side, and a side of the first electrical connector close to the fourth side has a sixth distance W2 from the fourth side, satisfying W1>W2.

[0013] Optionally, 1mm≤W1≤6mm; 0.5mm≤W2≤3mm are satisfied.

[0014] Optionally, along the second direction, the width of the first strip is D2, satisfying 1.5 mm≤D2≤8 mm.

[0015] Optionally, along the second direction, the battery cell has a fifth side and a sixth side that are relatively arranged, and the third electrical connector is the electrical connector closest to the fifth side or the sixth side; the photovoltaic component also includes a second strip, which extends along the first direction and covers the side of the third electrical connector away from the battery cell.

[0016] Optionally, along the second direction, the width of the second strip is D3, satisfying 1 mm≤D3≤5 mm.

[0017] Optionally, the photovoltaic component also includes a fourth electrical connector, which extends along the first direction and is arranged adjacent to the third electrical connector along the second direction, and there is a seventh distance between the fourth electrical connector and the third electrical connector, and the seventh distance is smaller than the second distance; the photovoltaic component also includes a third strip, and the third strip covers the side of the third electrical connector and the fourth electrical connector away from the battery cell.

[0018] Optionally, along the second direction, the distance between the first electrical connector and the third electrical connector is equal to the distance between the second electrical connector and the fourth electrical connector.

[0019] Optionally, along the thickness direction of the photovoltaic module, the thickness of the first strip is h1, the height of the first electrical connector is h3, and the height of the second electrical connector is h4, satisfying h1<h3; h1<h4.

[0020] Optionally, 0.1 mm ≤ h1 < 0.35 mm; 0.15 mm ≤ h3 ≤ 0.35 mm; 0.15 mm ≤ h4 ≤ 0.35 mm are satisfied.

[0021] Optionally, a first bonding layer is provided between the first electrical connector and the first surface of the battery cell, and a second bonding layer is provided between the second electrical connector and the first surface of the battery cell; along the second direction, the center of the first electrical connector deviates from the center of the first bonding layer, and the center of the second electrical connector deviates from the center of the second bonding layer.

[0022] Optionally, along the second direction, there is an eighth distance D4 between the center of the first electrical connector and the center of the second electrical connector, and there is a ninth distance D5 between the center of the first bonding layer and the center of the second bonding layer, satisfying D5>D4, and / or the value of D5-D4 is less than or equal to 0.6 mm.

[0023] Optionally, along the second direction, the widths of the first electrical connector, the second electrical connector and the third electrical connector are D6, satisfying 0.15 mm ≤ D6 ≤ 0.6 mm.

[0024] Optionally, along the second direction, a portion of the first strip located between the first electrical connector and the second electrical connector is directly connected to the first surface of the battery cell.

[0025] Optionally, along the second direction, a width of a portion of the first strip located between the first electrical connector and the second electrical connector is D7, satisfying D7≥0.5 mm.

[0026] Optionally, a first fine grid and a second fine grid extending along the second direction are arranged on the first surface of the battery cell, and the first fine grid and the second fine grid are arranged at intervals along the first direction; the first electrical connector is connected to the first fine grid, and the second electrical connector is connected to the second fine grid.

[0027] Optionally, a second insulating block is disposed between the second fine grid and the first electrical connector, and a first insulating block is disposed between the first fine grid and the second electrical connector.

[0028] In a second aspect, the present application also discloses a method for preparing a photovoltaic module, the method comprising: providing a battery cell, the battery cell having a first surface and a second surface arranged opposite to each other; providing a first electrical connector, a second electrical connector and a third electrical connector, extending the first electrical connector, the second electrical connector and the third electrical connector along a first direction, and arranged adjacently and spaced apart in sequence along a second direction on the first surface of the battery cell, along the second direction, there is a first distance between the first electrical connector and the second electrical connector, there is a second distance between the second electrical connector and the third electrical connector, and the first distance is smaller than the second distance; providing a first strip, extending the first strip along the first direction, and covering a side of the first electrical connector and the second electrical connector away from the battery cell; wherein the second direction intersects with the first direction.

[0029] Optionally, before providing the first strip, the method further includes: preheating the first electrical connector, the second electrical connector and the third electrical connector so that the first electrical connector, the second electrical connector and the third electrical connector are bonded to the first surface of the battery cell.

[0030] Optionally, the method further includes: photocuring or thermally curing the first strip, so as to fix the first electrical connector and the second electrical connector to the first surface of the battery cell through the first strip.

[0031] Optionally, the method further includes: providing a first adhesive layer and a backplane, and stacking the first adhesive layer and the backplane in sequence on a side of the first strip away from the battery cell; providing a second adhesive layer and a cover plate, and stacking the second adhesive layer and the cover plate in sequence on a second surface of the battery cell; and laminating the photovoltaic module.

[0032] The present application discloses a photovoltaic module and a method for preparing the photovoltaic module, wherein the photovoltaic module includes a battery cell, wherein the battery cell has a first surface and a second surface arranged opposite to each other; a first electrical connector, a second electrical connector and a third electrical connector, wherein the first electrical connector, the second electrical connector and the third electrical connector all extend along a first direction and are arranged adjacent to each other and at intervals in sequence along a second direction, wherein the first electrical connector, the second electrical connector and the third electrical connector are all connected to the first surface of the battery cell, wherein along the second direction, there is a first distance between the first electrical connector and the second electrical connector, and a second distance between the second electrical connector and the third electrical connector, wherein the first distance is smaller than the second distance; and a first strip, wherein the first strip extends along the first direction and covers a side of the first electrical connector and the second electrical connector away from the battery cell; wherein the second direction intersects with the first direction.

[0033] In the present application, the first electrical connector, the second electrical connector and the third electrical connector are all extended along the first direction, and are arranged in sequence and spaced apart on the first surface of the battery cell along the second direction. Along the second direction, the first distance between the first electrical connector and the second electrical connector is smaller than the second distance between the second electrical connector and the third electrical connector. The first strip covers the side of the first electrical connector and the second electrical connector away from the battery cell, and the first electrical connector and the second electrical connector are fixed to the first surface of the battery cell through the first strip. This is to enhance the fixing force between the first electrical connector and the second electrical connector and the battery cell, and avoid poor contact between the first electrical connector and the second electrical connector and the battery cell, which affects the photoelectric conversion efficiency of the photovoltaic module.

[0034] Furthermore, through the above arrangement, the usage of the first strip material can be controlled to avoid waste of the first strip material, thereby helping to reduce the production cost of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A top view of the battery cell described in the embodiment of the present application is shown in FIG. Figure 1 ;

[0036] Figure 2 A top view of the battery cell described in the embodiment of the present application is shown in FIG. Figure 2 ;

[0037] Figure 3The structure of the photovoltaic module described in the embodiment of the present application is shown in FIG. Figure 1 ;

[0038] Figure 4 The structure of the photovoltaic module described in the embodiment of the present application is shown in FIG. Figure 2 ;

[0039] Figure 5 express Figure 4 Sectional view at AA in the middle;

[0040] Figure 6 The structure of the photovoltaic module described in the embodiment of the present application is shown in FIG. Figure 3 ;

[0041] Figure 7 The preparation process of the photovoltaic module described in the embodiment of the present application is shown in FIG. Figure 1 ;

[0042] Figure 8 The preparation process of the photovoltaic module described in the embodiment of the present application is shown in FIG. Figure 2 .

[0043] Reference numerals:

[0044] 10: battery cell; 11: first side; 12: second side; 13: fifth side; 14: sixth side; 15: first fine grid; 16: second fine grid;

[0045] 20: first electrical connector; 21: first electrical connector body; 22: first bonding layer;

[0046] 30: second electrical connector; 31: second electrical connector body; 32: second bonding layer;

[0047] 40: first strip; 41: third side; 42: fourth side;

[0048] 60: second strip;

[0049] 70: first insulating block; 71: second insulating block;

[0050] X: first direction; Y: second direction. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0052] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0053] Reference Figure 1 , showing a top view of the battery cell described in the embodiment of the present application Figure 1 ;reference Figure 2 , showing a top view of the battery cell described in the embodiment of the present application Figure 2 ;reference Figure 3 , showing the structure of the photovoltaic module described in the embodiment of the present application Figure 1 ;reference Figure 4 , showing the structure of the photovoltaic module described in the embodiment of the present application Figure 2 ;reference Figure 5 , showing Figure 4 Sectional view at AA in the middle; refer to Figure 6 , showing the structure of the photovoltaic module described in the embodiment of the present application Figure 3 .

[0054] like Figures 1 to 6 As shown, the embodiment of the present application discloses a photovoltaic module, which includes a cell 10, and the cell 10 has a first surface and a second surface arranged opposite to each other; it has a plurality of electrical connectors, and the plurality of electrical connectors are arranged at non-equidistant intervals, and the distances between adjacent same-sex electrical connectors are equal or approximately equal, while the distances between adjacent opposite-sex electrical connectors are unequal. Compared with one first-polarity electrical connector, there are two second-polarity electrical connectors adjacent to the first-polarity electrical connector, and the distances between the two second-polarity electrical connectors are unequal.

[0055] Specifically, the electrical connector includes a first electrical connector 20, a second electrical connector 30 and a third electrical connector, the first electrical connector 20, the second electrical connector 30 and the third electrical connector all extend along the first direction X, and are adjacent to each other and arranged at intervals along the second direction Y, the first electrical connector 20, the second electrical connector 30 and the third electrical connector are all connected to the first surface of the battery cell 10, along the second direction Y, there is a first distance between the first electrical connector 20 and the second electrical connector 30, there is a second distance between the second electrical connector 30 and the third electrical connector, and the first distance is smaller than the second distance; the first strip 40, the first strip 40 extends along the first direction X, and the first strip 40 covers the side of the first electrical connector 20 and the second electrical connector 30 away from the battery cell 10; wherein the second direction Y intersects with the first direction X.

[0056] like Figures 1 to 6 As shown, an embodiment of the present application discloses a photovoltaic module, which includes a cell 10, a first electrical connector 20, a second electrical connector 30, a third electrical connector and a first strip 40. Among them, the cell 10 is the core component of the photovoltaic module, which can convert solar energy into electrical energy. The cell 10 has a first surface and a second surface that are relatively arranged. The first surface can be the front of the cell 10, that is, the side facing the sunlight, and the first surface can also be the back of the cell 10, that is, the side facing away from the sunlight. When the first surface is the front of the cell 10, the second surface is the back of the cell 10. When the first surface is the back of the cell 10, the second surface is the front of the cell 10.

[0057] The following description will be made by taking the first surface as the back side of the cell 10 and the second surface as the front side of the cell 10 as an example to explain the present application. In other words, the following description will be made by taking the photovoltaic module as a back-contact photovoltaic module as an example to explain the photovoltaic module disclosed in the embodiment of the present application.

[0058] like Figures 1 to 6 As shown, the first electrical connector 20, the second electrical connector 30 and the third electrical connector in the embodiment of the present application all extend along the first direction X, and are arranged adjacently and spaced apart on the first surface of the battery cell 10 in sequence along the second direction Y. That is, the first electrical connector 20, the second electrical connector 30 and the third electrical connector are all connected to the back side of the battery cell 10.

[0059] The first electrical connector 20 and the second electrical connector 30 are connected to different electrodes of the battery cell 10, and the third electrical connector and the first electrical connector 20 are connected to the same electrode of the battery cell 10. That is, when the first electrical connector 20 and the third electrical connector are connected to the positive electrode of the battery cell 10, the second electrical connector 30 is connected to the negative electrode of the battery cell 10. When the first electrical connector 20 and the third electrical connector are connected to the negative electrode of the battery cell 10, the second electrical connector 30 is connected to the positive electrode of the battery cell 10.

[0060] It should be noted that the first electrical connector 20, the second electrical connector 30 and the third electrical connector in the embodiment of the present application are all conductive, and the first electrical connector 20, the second electrical connector 30 and the third electrical connector can collect the current generated by the battery cell 10 and conduct the current generated by the battery cell 10 to the external circuit. Exemplarily, the first electrical connector 20, the second electrical connector 30 and the third electrical connector can be welding strips. Of course, in the embodiment of the present application, there are no excessive restrictions on the specific structures of the first electrical connector 20, the second electrical connector 30 and the third electrical connector. In actual applications, technicians can choose according to needs.

[0061] In the embodiment of the present application, along the second direction Y, there is a first distance between the first electrical connector 20 and the second electrical connector 30, and there is a second distance between the second electrical connector 30 and the third electrical connector. The first distance is smaller than the second distance. That is, along the second direction Y, the distance between the first electrical connector 20 and the second electrical connector 30 is relatively close, and the distance between the second electrical connector 30 and the third electrical connector is relatively far.

[0062] like Figures 1 to 6 As shown, the first strip 40 in the embodiment of the present application extends along the first direction X, and the first strip 40 covers the first electrical connector 20 and the second electrical connector 30 on the side away from the battery cell 10. The first electrical connector 20 and the second electrical connector 30 are fixed to the first surface of the battery cell 10 through the first strip 40.

[0063] It should be noted that the first strip 40 in the embodiment of the present application may be a rubber strip or an adhesive film strip, so as to bond the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10 through the rubber strip or the adhesive film strip. Among them, the first strip 40 may be a single-layer rubber strip or a multi-layer rubber strip. In the case where the first strip 40 is a single-layer rubber strip, the single-layer rubber strip may be an EVA strip, a POE strip, or a PET strip. In the case where the first strip 40 is a multi-layer rubber strip, the multi-layer rubber strip may be a composite layer of organic materials such as EVA, POE, and PET. For example, the first strip 40 in the embodiment of the present application may be a three-layer rubber strip, and the three-layer structure is respectively an EVA layer, a POE layer, and a PET layer. The first strip 40 may also be a double-layer rubber strip, and the double-layer rubber strip is respectively an EVA layer and a POE layer.

[0064] In the embodiment of the present application, the second direction Y intersects with the first direction X. Preferably, the second direction Y is perpendicular to the first direction X.

[0065] In the embodiment of the present application, the first electrical connector 20, the second electrical connector 30 and the third electrical connector are all extended along the first direction X, and are sequentially arranged on the first surface of the battery cell 10 along the second direction Y. Along the second direction Y, the first distance between the first electrical connector 20 and the second electrical connector 30 is smaller than the second distance between the second electrical connector 30 and the third electrical connector. The first strip 40 is covered on the side of the first electrical connector 20 and the second electrical connector 30 away from the battery cell 10, and the first electrical connector 20 and the second electrical connector 30 are fixed to the first surface of the battery cell 10 through the first strip 40. This is to enhance the fixing force between the first electrical connector 20 and the second electrical connector 30 and the battery cell 10, and to avoid poor contact between the first electrical connector 20 and the second electrical connector 30 and the battery cell 10, thereby affecting the photoelectric conversion efficiency of the photovoltaic module.

[0066] Furthermore, through the above arrangement, the amount of material used in the first strip 40 can be controlled to avoid wasting the material of the first strip 40 , thereby helping to reduce the production cost of the photovoltaic module.

[0067] Alternatively, if Figure 4 As shown, the first strip 40 in the embodiment of the present application covers the end of the first electrical connector 20 connected to the first surface of the battery cell 10; the first strip 40 covers the end of the second electrical connector 30 connected to the first surface of the battery cell 10.

[0068] like Figure 4 As shown, in the embodiment of the present application, the first strip 40 covers the end of the first electrical connector 20 connected to the first surface of the battery cell 10, and the end of the second electrical connector 30 connected to the first surface of the battery cell 10. This prevents the end of the first electrical connector 20 connected to the first surface of the battery cell 10 and the end of the second electrical connector 30 connected to the first surface of the battery cell 10 from being offset, resulting in a short circuit in the photovoltaic module.

[0069] In the embodiment of the present application, the first strip 40 covers the end of the first electrical connector 20 connected to the first surface of the cell 10, and the end of the second electrical connector 30 connected to the first surface of the cell 10. The fixing force between the first electrical connector 20 and the second electrical connector 30 and the cell 10 can be further improved to avoid poor contact between the first electrical connector 20 and the second electrical connector 30 and the cell 10, thereby affecting the photoelectric conversion efficiency of the photovoltaic module.

[0070] Alternatively, if Figure 4 As shown, in the embodiment of the present application, along the second direction Y, the first distance between the first electrical connector 20 and the second electrical connector 30 is D1, and D1≥0.5 mm.

[0071] like Figure 4 As shown, the first electrical connector 20 and the second electrical connector 30 in the embodiment of the present application are arranged at intervals along the second direction Y, and there is a first distance D1 between the first electrical connector 20 and the second electrical connector 30, and D1 is greater than or equal to 0.5 mm. By setting the first distance D1 between the first electrical connector 20 and the second electrical connector 30 to be greater than or equal to 0.5 mm, the reliability of the photovoltaic module is ensured, and the portion of the first strip 40 located between the first electrical connector 20 and the second electrical connector 30 is prevented from failing to adhere to the first surface of the battery cell 10, and bubbles are present between the portion of the first strip 40 located between the first electrical connector 20 and the second electrical connector 30 and the first surface of the battery cell 10, causing the first electrical connector 20 and the second electrical connector 30 to move toward each other, causing a short circuit in the photovoltaic module.

[0072] Exemplarily, along the second direction Y, there is a first distance D1 between the first electrical connector 20 and the second electrical connector 30 , and D1 is 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, etc.

[0073] Alternatively, if Figure 4 As shown, along the first direction X, the battery cell 10 has a first side 11 and a second side 12 that are oppositely arranged, a third distance S1 is between the end of the first strip 40 close to the first side 11 and the first side 11, and a fourth distance S2 is between the end of the first strip 40 close to the second side 12 and the second side 12, satisfying 1.5mm≤S1≤5mm; 1.5mm≤S2≤5mm.

[0074] like Figures 1 to 6 As shown, the battery cell 10 in the embodiment of the present application is a rectangular structure or a quasi-rectangular structure. The quasi-rectangular structure is formed by setting a chamfered structure on the battery cell of the rectangular structure. The battery cell 10 has a first side 11 and a second side 12 arranged oppositely along the first direction X, and has a fifth side 13 and a sixth side 14 arranged oppositely along the second direction Y.

[0075] like Figure 4 As shown, the first strip 40 in the embodiment of the present application extends along the first direction X, and the projection of the first strip 40 on the plane where the battery cell 10 is located falls into the battery cell 10. There is a third distance S1 between the end of the first strip 40 close to the first side 11 and the first side 11, and there is a fourth distance S2 between the end of the first strip 40 close to the second side 12 and the second side 12, wherein the third distance S1 is greater than or equal to 1.5 mm and less than or equal to 5 mm, and the fourth distance S2 is also greater than or equal to 1.5 mm and less than or equal to 5 mm.

[0076] In the embodiment of the present application, the third distance S1 and the fourth distance S2 are both set to be greater than or equal to 1.5 mm and less than or equal to 5 mm, so as to avoid the third distance S1 and the fourth distance S2 being too large, resulting in insufficient adhesion of the first strip 40, affecting the fixing force between the first electrical connector 20 and the second electrical connector 30 and the battery cell 10. In particular, the fixing force between the end of the first electrical connector 20 close to the first side 11 and the end of the second electrical connector 30 close to the second side 12 and the battery cell 10. Furthermore, it is also possible to avoid the third distance S1 and the fourth distance S2 being too small, so that the first strip 40 enters the gap between two adjacent battery cells 10, causing problems such as hidden cracks in the photovoltaic module.

[0077] Illustratively, the third distance S1 may be 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc. The fourth distance S2 may be 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc.

[0078] Preferably, S1=S2 is satisfied. That is, the third distance S1 between the end of the first strip 40 close to the first side 11 and the first side 11 is equal to the fourth distance S2 between the end of the first strip 40 close to the second side 12 and the second side 12, so as to further improve the reliability of the photovoltaic module.

[0079] Alternatively, if Figure 4 As shown, in the embodiment of the present application, along the second direction Y, the first strip 40 has a third side 41 and a fourth side 42 that are relatively arranged, and a side of the first electrical connector 20 close to the third side 41 has a fifth distance W1 from the third side 41, and a side of the first electrical connector 20 close to the fourth side 42 has a sixth distance W2 from the fourth side 42, satisfying W1>W2.

[0080] like Figure 4 As shown, the first strip 40 in the embodiment of the present application extends along the first direction X, and along the second direction Y, the first strip 40 has a third side 41 and a fourth side 42 that are arranged opposite to each other. There is a fifth distance W1 between the side of the first electrical connector 20 close to the third side 41 and the third side 41, and there is a sixth distance W2 between the side of the first electrical connector 20 close to the fourth side 42 and the fourth side 42, W1>W2.

[0081] In the embodiment of the present application, the fifth distance W1 between the side of the first electrical connector 20 close to the third side 41 and the third side 41 is set to be greater than the sixth distance W2 between the side of the first electrical connector 20 close to the fourth side 42 and the fourth side 42. This can enhance the reliability of the connection between the first electrical connector 20 and the battery cell 10, and prevent the first electrical connector 20 from being pulled up by an external force, resulting in poor contact between the first electrical connector 20 and the battery cell 10, thereby affecting the photoelectric conversion efficiency of the photovoltaic module.

[0082] It should be noted that in the embodiment of the present application, the distance between the side of the second electrical connector 30 close to the fourth side 42 and the fourth side 42 is greater than the distance between the side of the second electrical connector 30 close to the third side 41 and the third side 41. This will not be repeated here.

[0083] Optionally, in the embodiment of the present application, 1mm≤W1≤6mm; 0.5mm≤W2≤3mm are satisfied.

[0084] In the embodiment of the present application, a fifth distance W1 between the side of the first electrical connector 20 close to the third side 41 and the third side 41 is set to be greater than or equal to 1 mm and less than or equal to 6 mm. For example, the fifth distance W1 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, etc.

[0085] In the embodiment of the present application, a sixth distance W2 between the side of the first electrical connector 20 close to the fourth side 42 and the fourth side 42 is set to be greater than or equal to 0.5 mm and less than or equal to 3 mm. For example, the sixth distance W2 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.

[0086] In the embodiment of the present application, the fifth distance W1 is set to be greater than or equal to 1 mm and less than or equal to 6 mm, and the sixth distance W2 is set to be greater than or equal to 0.5 mm and less than or equal to 3 mm, so as to enhance the reliability of the connection between the first electrical connector 20 and the battery cell 10, avoid poor contact between the first electrical connector 20 and the battery cell 10, and affect the photoelectric conversion efficiency of the photovoltaic module.

[0087] Alternatively, if Figure 4 As shown, along the second direction Y, the width of the first strip 40 is D2, satisfying 1.5 mm≤D2≤8 mm.

[0088] like Figure 4 As shown, in the embodiment of the present application, along the second direction Y, the width of the first strip 40 is D2, and D2 is greater than or equal to 1.5 mm and less than or equal to 8 mm. If the width of the first strip 40 is too large, the first strip 40 is prone to wrinkles, and there is a waste of material for the first strip 40, which affects the cost of the photovoltaic module. If the width of the first strip 40 is too small, the reliability of the connection between the first electrical connector 20 and the second electrical connector 30 and the battery cell 10 cannot be guaranteed.

[0089] For example, in the embodiment of the present application, along the second direction Y, the width D2 of the first strip 40 may be 1.5 mm, 3 mm, 4.5 mm, 6 mm, 7 mm, 8 mm, etc.

[0090] Alternatively, if Figures 1 to 4 As shown, along the second direction Y, the cell 10 has a fifth side 13 and a sixth side 14 that are arranged opposite to each other, and the third electrical connector is the electrical connector closest to the fifth side 13 or the sixth side 14; the photovoltaic module further includes a second strip 60, which extends along the first direction X and covers the side of the third electrical connector away from the cell 10. That is, along the second direction Y, the third electrical connector is the most peripheral electrical connector, which is covered by the second strip 60 alone.

[0091] like Figures 1 to 4 As shown, the third electrical connector in the embodiment of the present application extends along the first direction X, and is spaced apart from the first electrical connector 20 and the second electrical connector 30 along the second direction Y. The third electrical connector is closest to the fifth side 13 or the sixth side 14 of the battery cell 10, that is, the third electrical connector is the electrical connector closest to the edge of the battery cell 10, so that the current generated by the battery cell 10 near the fifth side 13 or the sixth side 14 is collected through the third electrical connector.

[0092] The second strip 60 in the embodiment of the present application extends along the first direction X and covers the side of the third electrical connector away from the battery cell 10, so as to fix the third electrical connector to the area of ​​the first surface of the battery cell 10 close to the fifth side 13 or the sixth side 14 through the second strip 60, thereby improving the fixing force between the third electrical connector and the battery cell 10 and avoiding poor contact between the third electrical connector and the battery cell 10, which affects the photoelectric conversion efficiency of the photovoltaic module.

[0093] Alternatively, if Figure 4 As shown, along the second direction Y, the width of the second strip 60 is D3, satisfying 1 mm ≤ D3 ≤ 5 mm.

[0094] like Figure 4 As shown, in the embodiment of the present application, along the second direction Y, the width of the second strip 60 is D3, and D3 is greater than or equal to 1 mm and less than or equal to 5 mm. If the width of the second strip 60 is too large, the second strip 60 is prone to wrinkles, and there is a waste of material for the second strip 60, which affects the cost of the photovoltaic module. If the width of the second strip 60 is too small, the reliability of the connection between the third electrical connector and the battery cell 10 cannot be guaranteed.

[0095] For example, in the embodiment of the present application, along the second direction Y, the width D3 of the second strip 60 may be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, etc.

[0096] Alternatively, if Figure 4 As shown, the photovoltaic component disclosed in the embodiment of the present application also includes a fourth electrical connector, which extends along the first direction X and is arranged adjacent to the third electrical connector along the second direction Y, and there is a seventh distance between the fourth electrical connector and the third electrical connector, and the seventh distance is less than the second distance; the photovoltaic component also includes a third strip, and the third strip covers the side of the third electrical connector and the fourth electrical connector away from the battery cell 10.

[0097] In the embodiment of the present application, the first electrical connector 20 and the second electrical connector 30 form a group of electrical connectors, and the third electrical connector and the fourth electrical connector form a group of electrical connectors. The first electrical connector 20, the second electrical connector 30, the third electrical connector and the fourth electrical connector are spaced apart along the second direction Y so as to collect the current generated by the battery cell 10 through multiple groups of electrical connectors and transmit it to an external circuit to improve the photoelectric conversion efficiency of the photovoltaic module.

[0098] like Figure 4 As shown, the third electrical connector in the embodiment of the present application can be an electrical connector that is separately arranged along the second direction Y closest to the fifth side 13 or the sixth side 14 of the battery cell 10. The electrical connector is covered by the second strip and does not form an electrical connector group. Alternatively, the third electrical connector in the embodiment of the present application can also be one of a group of electrical connectors, and the first electrical connector 20 and the second electrical connector 30 are the electrical connector groups close to the third electrical connector. Figure 6 In the photovoltaic assembly shown, there is no separate electrical connector, and all electrical connectors are grouped into electrical connectors in pairs, wherein the third electrical connector may be an electrical connector in one of the electrical connector groups.

[0099] Through the above arrangement, the width of the first strip 40 can be reduced, the amount of the first strip 40 can be saved, and the cost of the photovoltaic module can be reduced. Furthermore, sufficient width can be reserved for the first strip 40 to be bonded to the first surface of the battery cell 10, thereby enhancing the reliability of the bonding between the first strip 40 and the battery cell 10.

[0100] Preferably, if Figures 4 to 6 As shown, along the second direction Y, the distance between the first electrical connector 20 and the third electrical connector is equal to the distance between the second electrical connector 30 and the fourth electrical connector.

[0101] As a preferred implementation, in the embodiment of the present application, along the second direction Y, the distance between the first electrical connector 20 and the third electrical connector is set to be equal to the distance between the second electrical connector 30 and the fourth electrical connector. This makes the arrangement of the plurality of electrical connectors on the surface of the cell 10 more regular, so that the electrical connectors can better collect the current generated by the cell 10, thereby helping to improve the photoelectric conversion efficiency of the photovoltaic module.

[0102] Alternatively, if Figure 5 As shown, along the thickness direction of the photovoltaic module, the thickness of the first strip 40 is h1, the height of the first electrical connector 20 is h3, and the height of the second electrical connector 30 is h4, satisfying h1<h3; h1<h4.

[0103] like Figure 5As shown, along the thickness direction of the photovoltaic module, the thickness of the first strip 40 is set to h1, the height of the first electrical connector 20 is set to h3, and the height of the second electrical connector 30 is set to h4, wherein h1<h3, and h1<h4. That is, along the thickness direction of the photovoltaic module, the thickness of the first strip 40 is less than the height of the first electrical connector 20, and also less than the height of the second electrical connector 30.

[0104] In the embodiment of the present application, along the thickness direction of the photovoltaic module, the thickness of the first strip 40 is less than the height of the first electrical connector 20, and the thickness of the first strip 40 is less than the height of the second electrical connector 20. Through the above arrangement, the fixing force between the first strip 40 and the battery cell 10 can be improved, so that the first strip 40 can better fix the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10. Furthermore, it can also avoid that the first strip 40 is too thick, resulting in waste of material of the first strip 40.

[0105] It should be noted that, along the thickness direction of the photovoltaic module, the height of the first electrical connector 20 and the height of the second electrical connector 30 may be equal or different. In this regard, no specific limitation is made in the embodiments of the present application. In actual applications, technicians can set it as needed. Preferably, along the thickness direction of the photovoltaic module, the height of the first electrical connector 20 is equal to the height of the second electrical connector 30.

[0106] Optionally, 0.1 mm ≤ h1 < 0.35 mm; 0.15 mm ≤ h3 ≤ 0.35 mm; 0.15 mm ≤ h4 ≤ 0.35 mm are satisfied.

[0107] like Figure 5 As shown, along the thickness direction of the photovoltaic module, the height of the first electrical connector 20 is greater than or equal to 0.15 mm and less than or equal to 0.35 mm. For example, the height of the first electrical connector 20 can be 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, etc.

[0108] Along the thickness direction of the photovoltaic module, the height of the second electrical connector 30 is greater than or equal to 0.15 mm and less than or equal to 0.35 mm. For example, the height of the second electrical connector 30 can be 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, etc.

[0109] It should be noted that the first electrical connector 20 and the second electrical connector 30 in the embodiment of the present application may be welding strips of the same specification or welding strips of different specifications, and no specific limitation is imposed on this.

[0110] like Figure 5As shown, along the thickness direction of the photovoltaic module, the thickness of the first strip 40 is greater than or equal to 0.1 mm and less than 0.35 mm. For example, the thickness of the first strip 40 can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, etc.

[0111] Optionally, along the thickness direction of the photovoltaic module, the thickness of the second strip 60 is h2, and the height of the third electrical connector is h5, satisfying h2<h5.

[0112] Along the thickness direction of the photovoltaic module, the thickness of the second strip 60 is set to h2, and the height of the third electrical connector is set to h5, where h2<h5. That is, along the thickness direction of the photovoltaic module, the thickness of the second strip 60 is less than the height of the third electrical connector.

[0113] In the embodiment of the present application, along the thickness direction of the photovoltaic module, the thickness of the second strip 60 is less than the height of the third electrical connector. Through the above arrangement, the fixing force between the second strip 60 and the battery cell 10 can be improved, so that the second strip 60 can better fix the third electrical connector to the first surface of the battery cell 10. Furthermore, it can also avoid that the second strip 60 is too thick, resulting in waste of material of the second strip 60.

[0114] Optionally, 0.1mm≤h2≤0.4mm; 0.15mm≤h5≤0.35mm is satisfied.

[0115] Along the thickness direction of the photovoltaic module, the height of the third electrical connector is greater than or equal to 0.15 mm and less than or equal to 0.35 mm. For example, the height of the third electrical connector can be 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, etc.

[0116] Along the thickness direction of the photovoltaic module, the thickness of the second strip 60 is greater than or equal to 0.1 mm and less than or equal to 0.4 mm. For example, the thickness of the second strip 60 can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, etc.

[0117] Alternatively, if Figure 5 As shown, in the embodiment of the present application, there is a first bonding layer 22 between the first electrical connector 20 and the first surface of the battery cell 10, and there is a second bonding layer 32 between the second electrical connector 30 and the first surface of the battery cell 10; along the second direction Y, the center of the first electrical connector 20 deviates from the center of the first bonding layer 22, and the center of the second electrical connector 30 deviates from the center of the second bonding layer 32.

[0118] Exemplarily, the first electrical connector 20 includes a first electrical connector body 21 and a first surface coating coated on the surface of the first electrical connector body 21. The first surface coating can constitute a part of the first bonding layer 22, or the first surface coating is directly sunken to form the first bonding layer 22 between the first electrical connector 20 and the battery cell 10.

[0119] The second electrical connector 30 includes a second electrical connector body 31 and a second surface coating coated on the surface of the second electrical connector body 31 . The second surface coating may constitute a part of the second bonding layer 32 , or the second surface coating may directly sink to form the second bonding layer 32 between the second electrical connector 30 and the battery cell 10 .

[0120] It should be noted that the first electrical connector body 21 in the embodiment of the present application may be a copper substrate, and the first surface coating may be a tin layer coated on the surface of the copper substrate. The provision of the first surface coating helps to improve the reliability of the connection between the first electrical connector 20 and the battery cell 10.

[0121] The second electrical connector body 31 may be a copper substrate, and the second surface coating may be a tin layer coated on the surface of the copper substrate. The second surface coating helps to improve the reliability of the connection between the second electrical connector 30 and the battery cell 10.

[0122] like Figure 5 As shown, along the second direction Y, the center of the first electrical connector 20 deviates from the center of the first bonding layer 22 , and the center of the second electrical connector 30 deviates from the center of the second bonding layer 32 .

[0123] In the embodiment of the present application, along the second direction Y, the center of the first electrical connector 20 deviates from the center of the first bonding layer 22, and the center of the second electrical connector 30 deviates from the center of the second bonding layer 32. The first electrical connector 20 and the second electrical connector 30 are bonded to the first surface of the battery cell 10 through the first strip 40. The first bonding layer 22 and the second bonding layer 32 are melted by heating, so that the first electrical connector 20 and the second electrical connector 30 are electrically connected to the battery cell 10 through the first bonding layer 22 and the second bonding layer 32. By reasonably controlling the width of the first strip 40 in the second direction (for example, between 1.5 mm and 8 mm), the contraction of the first strip 40 in the lateral direction is controlled within a certain range, and then in the process of bonding and electrical connection, the offset of the first electrical connector 20 and the second electrical connector 30 is controlled within a reasonable range, which can avoid the short circuit of the first electrical connector 20 and the second electrical connector 30, and avoid the first electrical connector 20 and the second electrical connector 30 from deviating from the position where the gate line needs to be welded (for example, the pad or the local thickening position).

[0124] Preferably, if Figure 5As shown, along the second direction Y, there is an eighth distance D4 between the center of the first electrical connector 20 and the center of the second electrical connector 30, and there is a ninth distance D5 between the center of the first bonding layer 22 and the center of the second bonding layer 32, satisfying D5>D4. And the difference between D5 and D4 is less than or equal to 0.6mm, which can ensure that even if offset, the first electrical connector 20 and the second electrical connector 30 can be combined to the position where the gate line needs to be welded, such as a pad or a locally thickened position.

[0125] like Figure 5 As shown, along the second direction Y, there is an eighth distance D4 between the center of the first electrical connector 20 and the center of the second electrical connector 30, and there is a ninth distance D5 between the center of the first bonding layer 22 and the center of the second bonding layer 32, wherein the ninth distance D5 is greater than the eighth distance D4. That is, along the second direction Y, the first electrical connector 20 is offset toward the direction close to the second electrical connector 30, and the second electrical connector 30 is offset toward the direction close to the first electrical connector 20.

[0126] Alternatively, if Figure 6 As shown, along the second direction Y, the width of the first electrical connector 20, the second electrical connector 30 or the third electrical connector is D6, satisfying 0.15 mm ≤ D6 ≤ 0.6 mm.

[0127] like Figure 6 As shown, along the second direction Y, the width of the first electrical connector 20, the second electrical connector 30 or the third electrical connector is D6, wherein the width of the first electrical connector 20, the second electrical connector 30 and the third electrical connector refers to the distance between the first bonding layer 22 wrapped on both sides of the first electrical connector body 21 along the second direction Y. It can also be understood that the width refers to the original width of the first electrical connector 20, the second electrical connector 30 and the third electrical connector before they are not connected to the battery cell 10. On the component side, it is the sum of the width of the unmelted part of the bonding layer of the electrical connector plus the width of the electrical connector body.

[0128] In the embodiment of the present application, along the second direction Y, the width of the first electrical connector 20, the second electrical connector 30 or the third electrical connector is set to be greater than or equal to 0.15 mm and less than or equal to 0.6 mm, so as to improve the reliability of the electrical connection between the first electrical connector 20, the second electrical connector 30 and the third electrical connector and the battery cell 10.

[0129] Exemplarily, along the second direction Y, the width of the first electrical connector 20 , the second electrical connector 30 or the third electrical connector is 0.15 mm, 0.25 mm, 0.35 mm, 0.45 mm, 0.55 mm, 0.6 mm, etc.

[0130] Alternatively, if Figure 6As shown, along the second direction Y, a portion of the first strip 40 located between the first electrical connector 20 and the second electrical connector 30 is directly connected to the first surface of the battery cell 10 .

[0131] like Figure 6 As shown, along the second direction Y, the portion of the first strip 40 between the first electrical connector 20 and the second electrical connector 30 is directly connected to the first surface of the battery cell 10 to improve the reliability of the connection between the first strip 40 and the first surface of the battery cell 10 .

[0132] Alternatively, if Figure 6 As shown, along the second direction Y, the width of the first strip 40 between the first electrical connector 20 and the second electrical connector 30 is D7, satisfying D7≥0.5 mm.

[0133] like Figure 6 As shown, along the second direction Y, the width of the portion of the first strip 40 between the first electrical connector 20 and the second electrical connector 30 is greater than or equal to 0.5 mm. By setting the width of the portion of the first strip 40 between the first electrical connector 20 and the second electrical connector 30 to be greater than or equal to 0.5 mm, the reliability of the photovoltaic module is ensured, and the portion of the first strip 40 between the first electrical connector 20 and the second electrical connector 30 is prevented from failing to adhere to the first surface of the battery cell 10, and bubbles are present between the portion of the first strip 40 between the first electrical connector 20 and the second electrical connector 30 and the first surface of the battery cell 10, causing the first electrical connector 20 and the second electrical connector 30 to move toward each other, causing a short circuit in the photovoltaic module.

[0134] Exemplarily, along the second direction Y, the width of the first strip 40 between the first electrical connector 20 and the second electrical connector 30 is 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, etc.

[0135] Alternatively, if Figure 2 As shown, a first fine grid 15 and a second fine grid 16 extending along a second direction Y are arranged on the first surface of the battery cell 10, and the first fine grid 15 and the second fine grid 16 are arranged at intervals along the first direction X; the first electrical connector 20 is connected to the first fine grid 15, and the second electrical connector 30 is connected to the second fine grid 16.

[0136] like Figure 2As shown, in the embodiment of the present application, a first fine grid 15 and a second fine grid 16 extending along the second direction Y are arranged on the first surface of the battery cell 10, and the first fine grid 15 and the second fine grid 16 are arranged at intervals along the first direction X. The current generated by the battery cell 10 is collected by the first fine grid 15 and the second fine grid 16. The polarities of the first fine grid 15 and the second fine grid 16 are opposite, that is, when the first fine grid 15 is a positive electrode, the second fine grid 16 is a negative electrode, and when the first fine grid 15 is a negative electrode, the second fine grid 16 is a positive electrode. The first electrical connector 20 is connected to the first fine grid 15, and the second electrical connector 30 is connected to the second fine grid 16, so that the current collected by the first fine grid 15 is collected by the first electrical connector 20, and the current collected by the second fine grid 16 is collected by the second electrical connector 30.

[0137] Alternatively, if Figure 2 As shown, a second insulating block 71 is disposed between the second fine grid 16 and the first electrical connector 20 , and a first insulating block 70 is disposed between the first fine grid 15 and the second electrical connector 30 .

[0138] like Figure 2 As shown, in the embodiment of the present application, a second insulating block 71 is arranged between the second fine grid 16 and the first electrical connector 20 to block the second fine grid 16 and the first electrical connector 20 through the second insulating block 71, and a first insulating block 70 is arranged between the first fine grid 15 and the second electrical connector 30 to block the first fine grid 15 and the second electrical connector 30 through the first insulating block 70, thereby improving the reliability of the photovoltaic module.

[0139] Reference Figure 7 , showing the preparation process of the photovoltaic module described in the embodiment of the present application Figure 1 ;reference Figure 8 , showing the preparation process of the photovoltaic module described in the embodiment of the present application Figure 2 .

[0140] like Figure 7 As shown, the embodiment of the present application discloses a method for preparing a photovoltaic module, the method comprising:

[0141] 101 , providing a battery cell 10 , wherein the battery cell 10 has a first surface and a second surface that are oppositely disposed.

[0142] In the process of preparing the photovoltaic module, it is necessary to provide a cell 10, which is the core component of the photovoltaic module and can convert solar energy into electrical energy. The cell 10 has a first surface and a second surface that are arranged opposite to each other. The first surface can be the front of the cell 10, that is, the side facing the sunlight, and the first surface can also be the back of the cell 10, that is, the side facing away from the sunlight. When the first surface is the front of the cell 10, the second surface is the back of the cell 10. When the first surface is the back of the cell 10, the second surface is the front of the cell 10.

[0143] The following description will be made by taking the first surface as the back side of the cell 10 and the second surface as the front side of the cell 10 as an example to explain the present application. In other words, the following description will be made by taking the photovoltaic module as a back-contact photovoltaic module as an example to explain the photovoltaic module disclosed in the embodiment of the present application.

[0144] 102, providing a first electrical connector 20, a second electrical connector 30 and a third electrical connector, extending the first electrical connector 20, the second electrical connector 30 and the third electrical connector along a first direction X, and arranged adjacently and spaced apart in sequence along a second direction Y on a first surface of the battery cell 10; wherein, along the second direction Y, there is a first distance between the first electrical connector 20 and the second electrical connector 30, there is a second distance between the second electrical connector 30 and the third electrical connector, and the first distance is smaller than the second distance.

[0145] It should be noted that a plurality of first fine grids 15 and a plurality of second fine grids 16 extending along the second direction Y are arranged on the first surface of the battery cell 10, and the plurality of first fine grids 15 and the plurality of second fine grids 16 are arranged alternately and at intervals along the first direction X. The current generated by the battery cell 10 is collected through the first fine grids 15 and the second fine grids 16. The first electrical connector 20 is connected to the first fine grid 15, the second electrical connector 30 is connected to the second fine grid 16, and the third electrical connector is connected to the first fine grid 15, so that the current generated by the battery cell 10 is collected through the first electrical connector 20, the second electrical connector 30 and the third electrical connector, and transmitted to the external circuit.

[0146] In the embodiment of the present application, the electrodes of the first fine grid 15 and the second fine grid 16 are different. When the first fine grid 15 is the positive electrode of the battery cell 10, the second fine grid 16 is the negative electrode of the battery cell 10. When the first fine grid 15 is the negative electrode of the battery cell 10, the second fine grid 16 is the positive electrode of the battery cell 10.

[0147] During the processing of the photovoltaic module, the first surface of the cell 10 can be placed upward, and the first electrical connector 20, the second electrical connector 30 and the third electrical connector are all extended along the first direction X, and are sequentially arranged on the first surface of the cell 10 along the second direction Y. The first electrical connector 20 is connected to the first fine grid 15, and the first electrical connector 20 and the second fine grid 16 are blocked by an insulating block. The second electrical connector 30 is connected to the second fine grid 16, and the second electrical connector 30 and the first fine grid 15 are blocked by an insulating block. The third electrical connector is connected to the first fine grid 15, and the third electrical connector and the second fine grid 16 are blocked by an insulating block.

[0148] It should be noted that, in the embodiment of the present application, along the second direction Y, there is a first distance between the first electrical connector 20 and the second electrical connector 30, and there is a second distance between the second electrical connector 30 and the third electrical connector. The first distance is smaller than the second distance. In other words, along the second direction Y, the distance between the first electrical connector 20 and the second electrical connector 30 is relatively close, and the distance between the second electrical connector 30 and the third electrical connector is relatively far.

[0149] 103 , providing a first strip 40 , extending the first strip 40 along the first direction X, and covering a side of the first electrical connector 20 and the second electrical connector 30 away from the battery cell 10 .

[0150] The first strip 40 covers the side of the first electrical connector 20 and the second electrical connector 30 away from the battery cell 10 , so as to fix the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10 through the first strip 40 .

[0151] It should be noted that the first strip 40 in the embodiment of the present application may be an adhesive strip, so as to bond the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10 through the adhesive strip. Among them, the first strip 40 may be a single-layer adhesive strip or a multi-layer adhesive strip. In the case where the first strip 40 is a single-layer adhesive strip, the single-layer adhesive strip may be an EVA strip, a POE strip, or a PET strip. In the case where the first strip 40 is a multi-layer adhesive strip, the multi-layer adhesive strip may be a composite layer of organic materials such as EVA, POE, and PET. For example, the first strip 40 in the embodiment of the present application may be a three-layer adhesive strip, and the three-layer structure is respectively an EVA layer, a POE layer, and a PET layer. The first strip 40 may also be a double-layer adhesive strip, and the double-layer adhesive strip is respectively an EVA layer and a POE layer.

[0152] In the embodiment of the present application, the first electrical connector 20, the second electrical connector 30 and the third electrical connector are all extended along the first direction X, and are sequentially arranged on the first surface of the battery cell 10 along the second direction Y. Along the second direction Y, the first distance between the first electrical connector 20 and the second electrical connector 30 is smaller than the second distance between the second electrical connector 30 and the third electrical connector. The first strip 40 is covered on the side of the first electrical connector 20 and the second electrical connector 30 away from the battery cell 10, and the first electrical connector 20 and the second electrical connector 30 are fixed to the first surface of the battery cell 10 through the first strip 40. This is to enhance the fixing force between the first electrical connector 20 and the second electrical connector 30 and the battery cell 10, and to avoid poor contact between the first electrical connector 20 and the second electrical connector 30 and the battery cell 10, thereby affecting the photoelectric conversion efficiency of the photovoltaic module.

[0153] Furthermore, through the above arrangement, the amount of material used in the first strip 40 can be controlled to avoid wasting the material of the first strip 40 , thereby helping to reduce the production cost of the photovoltaic module.

[0154] like Figure 8 As shown, the embodiment of the present application also discloses a method for preparing a photovoltaic module, the method comprising:

[0155] 201 , providing a battery cell 10 , wherein the battery cell 10 has a first surface and a second surface that are oppositely disposed.

[0156] Step 201 in the embodiment of the present application is the same as step 101 in the above embodiment, and the relevant contents are referred to in the above embodiment.

[0157] 202, providing a first electrical connector 20, a second electrical connector 30 and a third electrical connector, extending the first electrical connector 20, the second electrical connector 30 and the third electrical connector along the first direction X, and arranged adjacently and spaced apart in sequence along the second direction Y on the first surface of the battery cell 10, along the second direction Y, there is a first distance between the first electrical connector 20 and the second electrical connector 30, there is a second distance between the second electrical connector 30 and the third electrical connector, and the first distance is smaller than the second distance.

[0158] Step 202 in the embodiment of the present application is the same as step 102 in the above embodiment, and the relevant contents are referred to in the above embodiment.

[0159] 203 , preheating the first electrical connector 20 , the second electrical connector 30 and the third electrical connector so that the first electrical connector 20 , the second electrical connector 30 and the third electrical connector are bonded to the first surface of the battery cell 10 .

[0160] During the processing of the photovoltaic module, the first electrical connector 20, the second electrical connector 30 and the third electrical connector may also be preheated to allow the first electrical connector 20, the second electrical connector 30 and the third electrical connector to be bonded to the first surface of the battery cell 10. This prevents the first electrical connector 20, the second electrical connector 30 and the third electrical connector from being offset during the process of fixing the first electrical connector 20, the second electrical connector 30 and the third electrical connector to the first surface of the battery cell 10 by the first strip 40, thereby affecting the reliability of the photovoltaic module.

[0161] Exemplarily, the first electrical connector 20, the second electrical connector 30 and the third electrical connector can be pressed by a pressing block and heated to pre-join the first electrical connector 20 with the first fine grid 15, the second electrical connector 30 with the second fine grid 16, and the third electrical connector with the first fine grid 15.

[0162] 204 , providing a first strip 40 , extending the first strip 40 along the first direction X, and covering a side of the first electrical connector 20 and the second electrical connector 30 away from the battery cell 10 .

[0163] In the embodiment of the present application, the first strip 40 covers the first electrical connector 20 and the second electrical connector 30 on the side away from the battery cell 10 , so as to fix the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10 through the first strip 40 .

[0164] It should be noted that the first strip 40 in the embodiment of the present application may be an adhesive strip, so as to bond the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10 through the adhesive strip. Among them, the first strip 40 may be a single-layer adhesive strip or a multi-layer adhesive strip. In the case where the first strip 40 is a single-layer adhesive strip, the single-layer adhesive strip may be an EVA strip, a POE strip, or a PET strip. In the case where the first strip 40 is a multi-layer adhesive strip, the multi-layer adhesive strip may be a composite layer of organic materials such as EVA, POE, and PET. For example, the first strip 40 in the embodiment of the present application may be a three-layer adhesive strip, and the three-layer structure is respectively an EVA layer, a POE layer, and a PET layer. The first strip 40 may also be a double-layer adhesive strip, and the double-layer adhesive strip is respectively an EVA layer and a POE layer.

[0165] It should be noted that, in the embodiment of the present application, although the first strip 40 can fix the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10, no complete electrical connection is established between the first electrical connector 20 and the first fine grid 15 and between the second electrical connector 30 and the second fine grid 16, and at most only a preliminary pre-fixation is provided.

[0166] 205 , photocuring or thermally curing the first strip 40 to fix the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10 through the first strip 40 .

[0167] The first strip 40 is cured by photocuring to fix the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10 through the first strip 40. Alternatively, the first strip 40 is fixed by thermal curing to fix the first electrical connector 20 and the second electrical connector 30 to the first surface of the battery cell 10 through the first strip 40.

[0168] The method for preparing the photovoltaic module disclosed in the embodiment of the present application also includes:

[0169] Provide a first adhesive layer and a backplane, and stack the first adhesive layer and the backplane in sequence on the side of the first strip 40 away from the battery cell 10, so that the backplane is bonded to the side of the first strip 40 away from the battery cell 10 through the first adhesive layer, and the battery cell 10 is supported and protected by the backplane.

[0170] A second adhesive layer and a cover plate are provided, and the second adhesive layer and the cover plate are sequentially stacked on the second surface of the battery cell 10, so that the cover plate is bonded to the second surface of the battery cell 10 through the second adhesive layer, and the battery cell 10 is supported and protected by the cover plate.

[0171] The photovoltaic modules are laminated to form a laminate.

[0172] It should be noted that during the lamination of photovoltaic modules, the lamination temperature is greater than or equal to 150 degrees and less than or equal to 250 degrees, so that the first electrical connector 20 is electrically connected to the first fine grid 15 and the second electrical connector 30 is electrically connected to the second fine grid 16 .

[0173] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0174] Although the optional embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including optional embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0175] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0176] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. At the same time, for those skilled in the art, according to the principle and implementation mode of the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A photovoltaic module, characterized in that: include: A battery cell, wherein the battery cell has a first surface and a second surface arranged opposite to each other; A first electrical connector, a second electrical connector and a third electrical connector, wherein the first electrical connector, the second electrical connector and the third electrical connector all extend along a first direction and are arranged adjacent to each other and spaced apart in a second direction, wherein the first electrical connector, the second electrical connector and the third electrical connector are all connected to a first surface of the battery cell, and along the second direction, there is a first distance between the first electrical connector and the second electrical connector, and there is a second distance between the second electrical connector and the third electrical connector, and the first distance is smaller than the second distance; A first strip, the first strip extending along the first direction, the first strip covering a side of the first electrical connector and the second electrical connector away from the battery cell; The second direction intersects with the first direction.

2. The photovoltaic module according to claim 1, characterized in that: The first strip covers the end of the first electrical connector connected to the first surface of the battery cell; The first strip covers the end of the second electrical connector connected to the first surface of the battery cell.

3. The photovoltaic module according to claim 1, characterized in that: Along the second direction, a first distance between the first electrical connector and the second electrical connector is D1, and D1≥ 0.5mm.

4. The photovoltaic module according to claim 1, characterized in that: Along the first direction, the battery cell has a first side and a second side that are oppositely disposed. There is a third distance S1 between the end of the first strip close to the first side and the first side, and there is a fourth distance S2 between the end of the first strip close to the second side and the second side, satisfying 1.5mm≤S1≤5mm; 1.5mm≤S2≤5mm.

5. The photovoltaic module according to claim 4, characterized in that: Satisfies S1=S2.

6. The photovoltaic module according to claim 1, characterized in that: Along the second direction, the first strip has a third side and a fourth side that are oppositely arranged, A fifth distance W1 is provided between a side of the first electrical connector close to the third side and the third side, and a sixth distance W2 is provided between a side of the first electrical connector close to the fourth side and the fourth side, satisfying W1>W2.

7. The photovoltaic module according to claim 6, characterized in that: Satisfies 1mm≤W1≤6mm; 0.5mm≤W2≤3mm.

8. The photovoltaic module according to claim 1, characterized in that: Along the second direction, the width of the first strip is D2, satisfying 1.5 mm≤D2≤8 mm.

9. The photovoltaic module according to claim 1, characterized in that: Along the second direction, the battery cell has a fifth side and a sixth side that are arranged opposite to each other, and the third electrical connector is the electrical connector closest to the fifth side or the sixth side; The photovoltaic component further includes a second strip extending along the first direction and covering a side of the third electrical connector away from the solar cell.

10. The photovoltaic module according to claim 9, characterized in that: Along the second direction, the width of the second strip is D3, satisfying 1 mm ≤ D3 ≤ 5 mm.

11. The photovoltaic module according to any one of claims 1 to 10, characterized in that: The photovoltaic assembly further includes a fourth electrical connector, the fourth electrical connector extending along the first direction and arranged adjacent to the third electrical connector along the second direction, and a seventh distance exists between the fourth electrical connector and the third electrical connector, the seventh distance being smaller than the second distance; The photovoltaic assembly further includes a third strip, and the third strip covers a side of the third electrical connector and the fourth electrical connector away from the solar cell.

12. The photovoltaic module according to claim 11, characterized in that: Along the second direction, the distance between the first electrical connector and the third electrical connector is equal to the distance between the second electrical connector and the fourth electrical connector.

13. The photovoltaic module according to any one of claims 1 to 10, characterized in that: Along the thickness direction of the photovoltaic module, the thickness of the first strip is h1, the height of the first electrical connector is h3, and the height of the second electrical connector is h4, satisfying h1<h3; h1<h4.

14. The photovoltaic module according to claim 13, characterized in that: Satisfying 0.1mm≤h1<0.35mm; 0.15mm≤h3≤0.35mm; 0.15mm≤h4≤0.35mm.

15. The photovoltaic module according to claim 1, characterized in that: A first bonding layer is provided between the first electrical connection member and the first surface of the battery cell, and a second bonding layer is provided between the second electrical connection member and the first surface of the battery cell; Along the second direction, the center of the first electrical connection member deviates from the center of the first bonding layer, and the center of the second electrical connection member deviates from the center of the second bonding layer.

16. The photovoltaic module according to claim 15, characterized in that: Along the second direction, there is an eighth distance D4 between the center of the first electrical connector and the center of the second electrical connector, and there is a ninth distance D5 between the center of the first bonding layer and the center of the second bonding layer, satisfying D5>D4, and / or the value of D5-D4 is less than or equal to 0.6mm.

17. The photovoltaic module according to claim 1, characterized in that: Along the second direction, a width of the first electrical connector, the second electrical connector or the third electrical connector is D6, satisfying 0.15 mm≤D6≤0.6 mm.

18. The photovoltaic module according to claim 1, characterized in that: Along the second direction, a portion of the first strip located between the first electrical connector and the second electrical connector is directly connected to the first surface of the battery cell.

19. The photovoltaic module according to claim 18, characterized in that: Along the second direction, a width of a portion of the first strip located between the first electrical connector and the second electrical connector is D7, satisfying D7≥0.5 mm.

20. The photovoltaic module according to claim 1, characterized in that: A first fine grid and a second fine grid extending along the second direction are arranged on the first surface of the battery cell, and the first fine grid and the second fine grid are arranged at intervals along the first direction; The first electrical connection member is connected to the first fine grid, and the second electrical connection member is connected to the second fine grid.

21. The photovoltaic module according to claim 20, characterized in that: A second insulating block is disposed between the second fine grid and the first electrical connection member, and a first insulating block is disposed between the first fine grid and the second electrical connection member.

22. A method for preparing a photovoltaic module, characterized in that: The method comprises: Providing a battery cell, wherein the battery cell has a first surface and a second surface disposed opposite to each other; Providing a first electrical connector, a second electrical connector and a third electrical connector, extending the first electrical connector, the second electrical connector and the third electrical connector along a first direction, and sequentially arranged adjacently and spaced apart on a first surface of the battery cell along a second direction, wherein along the second direction, there is a first distance between the first electrical connector and the second electrical connector, and there is a second distance between the second electrical connector and the third electrical connector, and the first distance is smaller than the second distance; Providing a first strip, extending the first strip along the first direction and covering a side of the first electrical connector and the second electrical connector away from the battery cell; The second direction intersects with the first direction.

23. The method for preparing a photovoltaic module according to claim 22, characterized in that: Before providing the first strip, the method further comprises: The first electrical connector, the second electrical connector, and the third electrical connector are preheated so that the first electrical connector, the second electrical connector, and the third electrical connector are bonded to the first surface of the battery cell.

24. The method for preparing a photovoltaic module according to claim 22, characterized in that: The method further comprises: The first strip is photocured or thermally cured to fix the first electrical connector and the second electrical connector to the first surface of the battery cell through the first strip.

25. The method for preparing a photovoltaic module according to claim 22, characterized in that: The method further comprises: Providing a first adhesive layer and a back plate, and stacking the first adhesive layer and the back plate in sequence on a side of the first strip away from the battery cell; Providing a second adhesive layer and a cover plate, and stacking the second adhesive layer and the cover plate in sequence on the second surface of the battery cell; The photovoltaic module is laminated.

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