Solar cell module and photovoltaic system

Abstract

The utility model relates to the field of photovoltaic technology, and provides a solar cell module and a photovoltaic system. The solar cell module comprises a cell string, a bus bar, an identification code and a bonding piece, the cell string comprises a plurality of cell pieces, and every two adjacent cell pieces are partially overlapped; the bonding piece comprises a first area and a second area which are arranged at intervals in the first direction, the identification code is fixed to the first area, and the bonding piece is bonded to the end, close to the solar cell module, of the cell string through the second area. In the solar cell module, the identification code and the cell string are respectively fixed in the two areas of the bonding piece, and the two areas are arranged at an interval, so that the position of the identification code and the cell string can be fixed under the condition that the identification code is not shielded by the cell string; the battery string provides tension support and structural rigidity for the identification code, the stability of the identification code can be improved, and the risk that the identification code falls off or shifts is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field especially relates to a solar cell module and photovoltaic system. BACKGROUND

[0002] The identification code is an important component of the solar cell module and is mainly used for information tracking. In the production process, the information of the solar cell module can be input into the system through code scanning of the identification code to realize long-term storage of various production information of the solar cell module.

[0003] In the related art, the identification code in the solar cell module is usually pasted on the busbar of the cell string. In the solar cell module, the busbar is located on the back of the cell sheet, and the identification code is generally arranged on the adhesive film. However, the adhesive film has a certain flowability after being heated, and the identification code arranged on the adhesive film is prone to position deviation in the lamination process, which not only affects the subsequent code scanning operation of the identification code, but also has an adverse effect on the appearance of the module. Based on this, how to design the solar cell module to fix the position of the identification code has become a problem to be solved. SUMMARY

[0004] The utility model provides a kind of solar cell module and photovoltaic system to solve the problem of how to design solar cell module to fix the position of identification code.

[0005] The utility model embodiment is implemented as follows: the utility model provides a kind of solar cell module and photovoltaic system. The solar cell module includes: cell string, busbar, identification code and adhesive piece, the cell string includes multiple cell sheets, and the adjacent two pieces of the cell sheet partially overlap;The busbar is at least partially arranged on the back light surface of the cell string;The adhesive piece includes first area and second area spaced apart along the first direction, the identification code is fixed to the first area, and the adhesive piece is attached to the cell string near one end of the solar cell module through the second area.

[0006] Further, the width of the identification code in the first direction is 3mm to 15mm.

[0007] Further, the width of the second area in the first direction is 3mm to 10mm.

[0008] Further, the distance between the edge of the cell string and the side of the identification code close to the edge in the first direction is 0.2mm to 1mm.

[0009] Further, the identification code has a glue surface, and the glue surface faces the adhesive piece.

[0010] Further, the thermal deformation temperature of the adhesive is greater than 100 degrees Celsius.

[0011] Further, the solar cell module further comprises a film, the film covering the battery string and the identification code; wherein the film and the identification code are made of different materials.

[0012] Further, the adhesive is a PET adhesive or a PE adhesive.

[0013] Further, the film is one of an EVA film, an EPE film, a POE film, a PVB film, a TPO film, and a TPU film.

[0014] Further, the melting point of the adhesive is greater than the melting point of the film.

[0015] Further, the adhesive is a fluorescent adhesive.

[0016] Further, the identification code comprises at least one of a bar code, a two-dimensional code, an RFID tag, an NFC tag, and a data matrix code.

[0017] Further, the adhesive is one of an adhesive tape, a curing adhesive, and an electrostatic adsorption film.

[0018] The utility model embodiment further provides a photovoltaic system, the photovoltaic system includes a plurality of as described above solar cell module.

[0019] In the utility model, since the two areas of the adhesive are used to fix the identification code and the battery string respectively in the solar cell module, the two areas are arranged at intervals, so the position of the identification code can be fixed with the battery string under the condition that the identification code is not shielded by the battery string, the battery string provides tensile support and structural rigidity for the identification code, the stability of the identification code can be improved, and the risk of falling or displacement of the identification code is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0021] Figure 1 It is the module schematic diagram of photovoltaic system provided by an embodiment of the utility model;

[0022] Figure 2 It is the structural schematic diagram of solar cell module provided by an embodiment of the utility model.

[0023] Figure 3 is Figure 2 a schematic diagram of the bonding of the bonding member in the solar cell module described in the above embodiment;

[0024] Figure 4 is Figure 2 a schematic diagram of the bonding member structure in the solar cell module described in the above embodiment.

[0025] Main element symbol explanation: 1000, photovoltaic system; 100, solar cell module; 10, bonding member; 20, adhesive film; 30, cell string; 31, edge; 40, identification code; 50, busbar; 60, insulation strip; 70, solder strip; 11, first area; 12, second area. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, the following will further describe the present application in detail with reference to the drawings and examples. The examples described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application. In addition, it should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0027] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "top", "bottom", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second" are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0029] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "connection", "connection" should be broad sense understanding, for example, it can be fixed connection, also can be detachable connection, or integrally connected;It can be mechanical connection, or electrical connection or can communicate with each other;It can be directly connected, also can be indirectly connected through intermediate medium, it can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0030] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them.And, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than that of the second feature.The first feature "under", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] The following disclosure provides many different embodiments or examples for implementing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can refer to the same reference number and / or reference letter in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0032] Please refer to Figure 1 The photovoltaic system 1000 in the embodiment of the utility model can include the solar cell module 100 in the embodiment of the utility model, and it should be noted that the drawings provided by the application are schematic drawings, and some elements are not shown in the drawings.The purpose is to clearly describe the technical scheme and highlight the utility model. It is not intended to limit the technical scheme and not to include these undisplayed elements. That is to say, the drawings are only examples, and do not represent the specific form of the solar cell module 100. The solar cell module 100 of the embodiment of the utility model is an optimized design, which reduces or cancels the frame, so that the cell piece covers almost the entire area of the module, thereby maximizing the power generation area and efficiency.

[0033] The battery string 30 can specifically include a plurality of battery pieces, and two adjacent battery pieces partially overlap; each battery piece is connected by a welding strip 70 and a busbar 50, and the extension directions of the busbar 50 and the welding strip 70 are crossed. The busbar 50 is at least partially arranged on the back light surface of the battery string 30. The welding strip 70 specifically includes a positive electrode welding strip 70 and a negative electrode welding strip 70. The busbar 50 is electrically connected with the welding strip 70 of the same polarity, and the busbar 50 is insulated from the welding strip 70 of different polarity by an insulating strip 60.

[0034] It is worth noting that "the busbar 50 is at least partially arranged on the back light surface of the battery string 30" can be that part of the busbar 50 is arranged on the back light surface of the battery string 30, or all of the busbar 50 is arranged on the back light surface of the battery string 30.

[0035] As shown in Figure 2 , Figure 3 and Figure 4 , the solar cell module 100 in the embodiment of the utility model further includes: a battery string 30, an identification code 40, a busbar 50 and an adhesive member 10; the adhesive member 10 is used for fixing the identification code 40 and the battery string 30; the adhesive member 10 includes a first region 11 and a second region 12 arranged at intervals in a first direction, the identification code 40 is fixed to the first region 11, and the adhesive member 10 is adhered to one end of the battery string 30 close to the solar cell module 100 through the second region 12.

[0036] Therefore, since the two regions of the adhesive member 10 are used to fix the identification code 40 and the battery string 30 respectively in the solar cell module 100, and the two regions are arranged at intervals, the position of the identification code 40 can be fixed with the battery string 30 under the condition that the identification code 40 is not blocked by the battery string 30, so that the battery string 30 provides tensile support and structural rigidity for the identification code 40, the stability of the identification code 40 can be improved, and the risk of the identification code 40 falling off or shifting is reduced.

[0037] Specifically, the identification code 40 is adhered to the adhesive member 10, and the identification code 40 is in the first region 11, which is the adhesive fixing region of the adhesive member 10. The adhesive member 10 is also adhered to the battery string 30, and the adhesive member 10 is specifically adhered to one end of the battery string 30 close to the solar cell module 100. The battery string 30 is in the second region 12, which is the adhesive fixing region of the adhesive member 10.

[0038] It is worth noting that in the present embodiment, the "first direction" refers to the arrangement direction of the battery strings 30, or in other words, the extension direction of the solder strips 70. Of course, in other embodiments, the first direction can also refer to the extension direction of the battery strings 30, or in other words, the arrangement direction of the solder strips 70. In a possible implementation, the adhesive member 10 includes at least one of a tape, a cured adhesive, or an electrostatic adsorption film. Specifically, the adhesive member 10 can specifically fix the identification code 40 and the battery string 30 by means of adhesion. In the solar cell module 100 of the present embodiment, the first region 11 and the second region 12 can be specifically provided on the adhesive surface of the adhesive member 10. The identification code 40 is adhered to the first region 11 of the adhesive member 10, and the battery string 30 is adhered to the second region 12 of the adhesive member 10. In this way, the adhesive member 10 can adhere the identification code 40 to the battery string 30 to fix the position of the identification code 40.

[0039] Further, in a possible implementation, the identification code includes at least one of a bar code, a two-dimensional code, an RFID (Radio Frequency Identification) tag, an NFC (Near Field Communication) tag, or a data matrix code.

[0040] Further, the adhesive member 10 can be provided with a light transmittance greater than 90%. That is, the adhesive member 10 is specifically a transparent member. In this way, the adhesive member 10 can fix the identification code 40 without blocking the identification code 40, without affecting the subsequent code scanning of the identification code 40 and the overall appearance of the solar cell module 100.

[0041] As for the fixing method of the adhesive member 10 to the identification code 40, it is worth noting that when the number of battery strings 30 is multiple, the adhesive member 10 can be provided in connection with the battery string 30 closest to the identification code 40. That is, the identification code 40 is fixed to the first region 11, and the battery string 30 closest to the identification code 40 is fixed to the second region 12.

[0042] Further, as Figure 3 and Figure 4As shown, in a possible implementation, the width L of the identification code 40 in the first direction is 3mm to 15mm. For example, 3mm, 5mm, 7mm, 8mm, 10mm, or 15mm. In this way, the adhesive 10 can have a sufficient fixing distance from the identification code 40, and the adhesive 10 can provide sufficient fixing force to the identification code 40 to ensure that the position of the identification code 40 is not offset, and the position of the identification code 40 is fixed. At the same time, the width L of the identification code 40 in the first direction cannot be too wide, that is, the fixing distance of the adhesive 10 from the identification code 40 cannot be too wide, so as to prevent waste of cost. Specifically, the width L of the identification code 40 in the first direction is the width of the first area 11 in the first direction.

[0043] Specifically, the first area 11 can be slightly protruding from the identification code 40, and the adhesive 10 can completely cover the identification code 40. In this way, the adhesive 10 can provide sufficient fixing force to the identification code 40, and also has the effect of protecting the identification code 40, and can also prevent waste of cost due to excessive use of the adhesive 10.

[0044] Preferably, the width L of the identification code 40 in the first direction can be specifically set to 20mm to 35mm. In this way, the cost can be effectively controlled while avoiding that the identification code 40 provides sufficient fixing force to the battery string 30.

[0045] Further, as shown in Figure 3 and Figure 4 in a possible implementation, the width T of the second area 12 in the first direction is 3mm to 10mm. For example, 3mm, 5mm, 7mm, 8mm, or 10mm. In this way, the adhesive 10 can have a certain fixing distance from the battery string 30, and the battery string 30 can provide sufficient pulling force to the identification code 40 to ensure that the position of the identification code 40 is fixed, so that the position of the identification code 40 is not offset. At the same time, the width T of the second area 12 cannot be too wide, so as to prevent waste of cost. In addition, the battery string 30 will usually expand or shrink due to temperature changes, and the appropriate fixing distance between the adhesive 10 and the battery string 30 helps to maintain the stability of the adhesive 10, while not affecting the natural deformation of the battery string 30.

[0046] Preferably, the width T of the second area 12 can be set to 0.5mm to 1mm. In this way, the battery string 30 can provide sufficient pulling force to the adhesive 10 while preventing waste of cost.

[0047] Further, as shown in Figure 3 and Figure 4As shown, in a possible implementation, the distance D between the side of the edge 31 of the battery string 30 and the edge 31 along the first direction close to the identification code 40 is 0.2mm to 1mm. For example, 0.2mm, 0.5mm, 1mm.

[0048] In this way, the distance between the identification code 40 and the battery string 30 can be avoided to be too close, so that the identification code 40 can shield the battery string 30, thereby reducing the battery efficiency of the battery string 30, achieving the effect of improving the stability and service life of the solar cell module 100. At the same time, the distance between the identification code 40 and the battery string 30 can also be avoided to be too far, thereby causing the length of the bonding member 10 to be too long, thereby causing waste of materials, achieving the effect of saving costs.

[0049] In addition, in the embodiment, the distance D between the side of the edge 31 of the battery string 30 and the edge 31 along the first direction close to the identification code 40 is the distance between the first area 11 and the second area 12, or the distance between the identification code 40 and the battery string 30.

[0050] Further, in a possible implementation, the identification code 40 has a glue surface, and the glue surface faces the bonding member 10. In this way, by setting the glue surface of the identification code 40 to face the bonding member 10, a firm bond can be formed between the identification code 40 and the bonding member 10, achieving the effect of improving the fixing stability and durability of the identification code 40.

[0051] Specifically, the identification code 40 has a glue surface, and the glue surface of the identification code 40 can be adhesive after heating. The identification code 40 can be specifically set to have a glue surface facing the bonding member 10 and a non-glue surface facing away from the bonding member 10; of course, the upper and lower surfaces of the identification code 40 can also be set to be glue surfaces to further prevent the identification code 40 from shifting, achieving the effect of further improving the fixing stability and durability of the identification code 40.

[0052] Further, in a possible implementation, the solar cell module 100 further comprises a glue film 20, and the battery string 30 and the identification code 40 are located on the glue film 20. The material of the glue film 20 is different from that of the identification code. In this way, the flexibility of the application material of the solar cell module 100 can be improved; at the same time, different materials can also reduce the probability of poor bonding (such as blistering and warping), ensuring the quality of the solar cell module 100.

[0053] Specifically, the battery string 30 and the identification code 40 are both laminated to the adhesive film 20. In addition, the material of the adhesive film 20 and the material of the adhesive 10 can also be set to be different. In this way, the flexibility of the application material of the solar cell module 100 can be further improved; at the same time, the probability of poor bonding (such as blistering, warping) can be further reduced, and the quality of the solar cell module 100 can be ensured.

[0054] Specifically, in a possible implementation, the adhesive 10 can be set as a PET (polyethylene terephthalate) adhesive 10 or a PE (polyethylene) adhesive 10. The PET material has excellent mechanical properties, high strength and good toughness, and can provide reliable bonding strength and tear resistance to improve the adhesion of the adhesive 10, thereby further improving the setting stability and firmness of the identification code 40.

[0055] Specifically, in a possible implementation, the adhesive film 20 is one of an EVA (ethylene-vinyl acetate copolymer) adhesive film 20, an EPE (polyethylene foam) adhesive film 20, a POE (polyolefin elastomer) adhesive film 20, a PVB (polyvinyl butyral) adhesive film 20, a TPO (thermoplastic polyolefin) adhesive film 20, and a TPU (thermoplastic polyurethane) adhesive film 20. Preferably, the adhesive film 20 can be set to EVA material. The user can optimize the material of the adhesive film 20 according to the use environment, performance requirements and cost budget of the solar cell module 100, which is not limited here.

[0056] Further, in a possible implementation, the heat distortion temperature of the adhesive 10 is greater than 100 degrees Celsius. In this way, the stability of the adhesive 10 can be ensured during the lamination process of the photovoltaic module. The adhesive 10 can still maintain adhesion in a high-temperature environment, prevent the identification code 40 from being positionally offset, and ensure the stability and firmness of the identification code 40.

[0057] It is worth noting that the "heat distortion temperature of the adhesive 10" refers to the highest temperature at which the adhesive 10 remains stable under high-temperature conditions without melting. That is, the adhesive 10 will start to melt when the environment is higher than the heat distortion temperature, and the adhesive force or deformation will occur.

[0058] Specifically, since a large amount of heat is generated during lamination of the solar cell module 100, the adhesive 10 needs to be able to withstand the high-temperature environment during lamination to avoid losing adhesion or deforming under high temperature, thereby ensuring the stable fixation of the identification code 40.

[0059] In other embodiments, the performance of the adhesive 10 can be enhanced by filling the adhesive 10 with a material or adding a composite material. For example, the adhesive 10 can include a layer of glass fiber reinforced material or a layer of metal fiber to greatly improve the temperature resistance of the adhesive 10, allowing the adhesive 10 to work stably at a higher temperature, thereby ensuring that the position of the identification code 40 does not shift and the overall structure of the solar cell module 100 is not affected.

[0060] Further, in a possible implementation, the melting point of the adhesive 10 is greater than the melting point of the film 20. In this way, the adhesive 10 can be ensured not to be at risk of melting due to heat during the bonding process of the film 20, thereby improving the thermal stability of the adhesive 10.

[0061] Further, in a possible implementation, the adhesive 10 is a fluorescent adhesive 10. In this way, the position of the adhesive 10 can be identified, the accurate position of the adhesive 10 can be clearly identified, and the operator can effectively and quickly complete the accurate installation of the adhesive 10, preventing the adhesive 10 from being set off. At the same time, the adhesive 10 being a fluorescent adhesive 10 can also provide clear identification for the user, avoiding misoperation or incorrect positioning of the adhesive 10 in a high-temperature environment, and further ensuring the reliability and safety of the photovoltaic module.

[0062] For example, fluorescent dyes or fluorescent pigments can be added during the production of the adhesive 10. These dyes or pigments can make the adhesive 10 emit fluorescence, providing a clear visual effect. The adhesive 10 can be yellow, green, or orange, etc.

[0063] For example, the adhesive 10 can include a fluorescent coating. Such a fluorescent coating is usually composed of a high-temperature resistant resin and a fluorescent pigment. The fluorescent coating can cover the surface of the adhesive 10, providing the adhesive 10 with a fluorescent effect.

[0064] In addition, for the detection method of the adhesive 10, the solar cell module 100 can be cut from the edge of the cell string 30. Because the adhesive 10 and the film 20 are made of different materials, the components near the identification code 40 in the solar cell module 100 can be detected to identify the adhesive 10.

[0065] Of course, for the fluorescent adhesive 10, after the solar cell module 100 is cut from the edge of the cell string 30, the adhesive 10 can be detected by using a fluorescent microscope.

[0066] In the description of the specification, reference to "some embodiments," "certain embodiments," "example," "specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the above expressions in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0067] Moreover, the above-description of various examples is not intended to limit the scope of the application, but is intended to provide an overview of some of the exemplary embodiments. Other embodiments are within the scope of the application. Accordingly, the application is not limited to the above-described embodiments, but rather only by the appended claims.

Claims

1. A solar cell module, characterized in that, The solar cell module comprises: a battery string, a busbar, an identification code and an adhesive, the battery string comprising a plurality of battery pieces, two adjacent battery pieces partially overlapping; the busbar being at least partially disposed on the back surface of the battery string; the adhesive comprising a first region and a second region spaced apart along a first direction, the identification code being fixed to the first region, and the adhesive being adhered to the battery string through the second region.

2. The solar cell module according to claim 1, characterized by The width of the identification code in the first direction is 3mm to 15mm.

3. The solar cell module according to claim 1, characterized by, The width of the second region in the first direction is 3mm to 10mm.

4. The solar cell module according to claim 1, characterized by The distance between the edge of the battery string and the side of the identification code close to the edge in the first direction is 0.2mm to 1mm.

5. The solar cell module according to claim 1, characterized by, The identification code has a glue surface, which faces the adhesive.

6. The solar cell module according to claim 1, wherein The heat distortion temperature of the adhesive is greater than 100 degrees Celsius.

7. The solar cell module according to claim 1, wherein Further comprising a glue film covering the battery string and the identification code. The material of the glue film and the identification code is different.

8. The solar cell module according to claim 7, characterized by The adhesive is a PET adhesive or a PE adhesive.

9. The solar cell module according to claim 7, wherein The glue film is one of EVA glue film, EPE glue film, POE glue film, PVB glue film, TPO glue film and TPU glue film.

10. The solar cell module according to claim 7, wherein The melting point of the adhesive is greater than the melting point of the glue film.

11. The solar cell module according to claim 1, characterized by, The adhesive is a fluorescent adhesive.

12. The solar cell module according to claim 1, characterized by, The identification code comprises at least one of a bar code, a two-dimensional code, an RFID tag, an NFC tag or a data matrix code.

13. The solar cell module according to claim 1, characterized by, The adhesive is one of an adhesive tape, a cured glue or an electrostatic adsorption film.

14. A photovoltaic system characterized by, The solar cell module comprises a plurality of solar cell modules as claimed in any one of claims 1 to 13.

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