CN212934632U

CN212934632U - Solar cell module

Info

Publication number: CN212934632U
Application number: CN202021549913.6U
Authority: CN
Inventors: 陈红; 李森; 冯志强; 张原�; 简磊
Original assignee: Trina Solar Co Ltd
Current assignee: Trina Solar Changzhou Technology Co ltd; Trina Solar Co Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-04-09
Anticipated expiration: 2030-07-30

Abstract

The utility model provides a solar module, including a plurality of battery burst, wherein a plurality of battery burst are cut from the battery integer and come from the same position of battery integer. The utility model discloses a solar module through effectively categorised and obviously improve the power of encapsulation back battery piece subassembly with the battery burst, reduces the mismatch risk of battery piece subassembly power, and the technology complexity is not high, is fit for the large-scale production.

Description

Solar cell module

Technical Field

The utility model mainly relates to the field of photovoltaic technology, especially, relate to a solar module.

Background

In the field of solar cells, most of the current solar cells adopt a method of slicing and then packaging the whole solar cell, and the purpose is to reduce the impedance of a cell module so as to improve the power of the cell module.

However, the performance of different solar cells varies, and the performance of the solar cells varies from one position to another in the same solar cell. Therefore, after the solar cell is cut and sliced, the obtained cell slices are located at different positions of the solar cell whole slice before slicing, and the performances of the cell slices are different.

Fig. 1 is an effect diagram of a solar cell module directly packaged after a solar cell is sliced, wherein 10 is a cell module directly packaged after a solar cell is sliced according to the prior art. As shown in fig. 1, 11 and the portions having the same pattern represent that the cell segments are located at the edge positions (i.e., the edge pieces) of the whole solar cell before being divided; and 12 and the portions having the same pattern represent the cell segments in the middle of the solar cell monolith (i.e., the middle sheet) before being divided.

As shown in fig. 1, each of the side pieces and the middle piece are directly series-welded to form a cell module, and the side pieces and the middle piece are located at different positions of the whole solar cell before being divided, so that the performance of the cell module is different, and therefore, the power of the whole cell module shown in fig. 1 formed by direct series welding is low, and after mass production, reliability problems such as power variation and the like occur in a plurality of cell modules shown in fig. 1.

Particularly, for the production of some cell assemblies with high power requirements, the mismatch of power of the cell assemblies formed by direct series welding as shown in fig. 1 is a great risk, the reliability of actual production is low, the efficiency of producing the cell assemblies is affected, and raw materials are wasted.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a solar module can encapsulate according to the effective classification of battery burst, obviously improves the power of encapsulation back battery piece subassembly, reduces the mismatch risk of battery piece subassembly power.

The utility model discloses a solar module, including a plurality of battery burst, wherein a plurality of battery burst are cut from the battery integer and come from the same position of battery integer.

In an embodiment of the present invention, the plurality of battery slices are edge slice group battery slices or middle slice group battery slices.

In an embodiment of the present invention, each of the battery slices in the slice group battery slices has one cutting edge, and each of the battery slices in the middle slice group battery slices has two cutting edges.

In an embodiment of the present invention, the plurality of battery segments have the same size.

In an embodiment of the present invention, at least some of the battery segments have different sizes.

In an embodiment of the present invention, the solar cell module is formed by mutually arranging and encapsulating the edge piece group cell fragments or the middle piece group cell fragments with different sizes.

In an embodiment of the present invention, the performance parameter of the plurality of battery segments is higher than a threshold.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses a solar module screens and divides into groups through the position after to the whole burst of battery to be equipped with necessary capability test, can be better carry out effective classification with the battery burst of same power scope, obviously improve the power of encapsulation back battery piece subassembly, reduce the mismatch risk of battery piece subassembly power, and the technology complexity is not high, is fit for the large-scale production.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the principle of the invention. In the drawings:

fig. 1 is an effect diagram of a solar cell module directly packaged after a solar cell is sliced;

fig. 2a is a schematic view of a solar cell module according to an embodiment of the present invention;

fig. 2b is a schematic view of another solar cell module according to an embodiment of the present invention;

fig. 3 is a schematic view of a process for manufacturing a solar cell module according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

It will be understood that when an element is referred to as being "on," "connected to," "coupled to" or "contacting" another element, it can be directly on, connected or coupled to, or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to" or "directly contacting" another element, there are no intervening elements present. Similarly, when a first component is said to be "in electrical contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and/or other components that allow current to flow even without direct contact between the conductive components.

An embodiment of the utility model provides a solar module, this battery pack can utilize the effective classification of battery piece, obviously improves the power of encapsulation back battery piece subassembly, reduces the mismatch risk of battery piece subassembly power.

Fig. 2a is a schematic view of a solar cell module according to an embodiment of the present invention. Fig. 2b is a schematic view of another solar cell module according to an embodiment of the present invention. A solar cell module according to an embodiment of the present invention will be described with reference to fig. 2a and 2 b.

As described above, fig. 1 is an effect diagram of a solar cell module directly packaged after a solar cell is sliced. Taking all three solar cell slices (as indicated by a dashed box W in fig. 1) as an example, as shown in fig. 1, 11 and a portion having the same pattern represent that the cell slices are located at the edge positions of the solar cell slices before being divided, i.e., edge slices, and a plurality of edge slices obtained by cutting the solar cell slices constitute a group of edge slice group cell slices; and 12 and the part with the same pattern represent that the cell segment is in the middle position of the solar cell whole piece before being divided, namely, the middle piece, and a plurality of middle pieces obtained by cutting a plurality of solar cell whole pieces form a group of middle piece group cell segments.

As shown in fig. 2a, the plurality of cell segments in the solar cell module 21 are cut from the whole cell segment and all come from the same edge segment position of the whole cell segment, i.e. the plurality of cell segments in the solar cell module 21 all come from the above edge segment group cell segment.

As shown in fig. 2b, the plurality of cell segments in the solar cell module 22 are cut from the whole cell segment and all come from the same middle position of the whole cell segment, i.e. the plurality of cell segments in the solar cell module 21 all come from the middle group cell segment.

Preferably, in the embodiment of the solar module of the present invention, after the above-mentioned cutting of the plurality of battery slices, the performance test and the screening of the plurality of battery slices are also performed. The screening method can set a threshold value for the performance parameter to be tested in advance so as to remove the battery slices with the performance parameter lower than the threshold value. Therefore, the utility model discloses a performance parameter of a plurality of battery fragmentation among the solar module all can be higher than a threshold value.

For example, common performance testing methods may include a volt-ampere characteristic curve test (IV test) of a photovoltaic solar cell, and the IV performance of a solar cell sheet may be rapidly and accurately measured, classified, and the like. The test contents include open circuit voltage (Voc) and short circuit current (Isc), peak power (pmax), conversion efficiency (eff), maximum power point voltage (Vmpp), current (Impp), and Fill Factor (FF).

In addition, an Electroluminescence (EL) test can be adopted, the internal defect detection of the solar cell or the cell module is carried out by utilizing the electroluminescence principle of crystalline silicon, and the internal defect, hidden crack, fragment, insufficient solder, broken grid and different conversion efficiencies of the solar cell module can be detected, so that the abnormal phenomenon in the cell slicing is determined; or photo-induced power generation photon test (PL test), which takes light as an excitation means to excite electrons in the material to realize luminescence, thereby screening and analyzing cell cracks, holes, impurities, defect distribution and the like.

In an embodiment of the present invention, in particular, when performing the performance test and the screening on the plurality of battery slices, the method further includes using an Infrared Spectroscopy (IR) test. The IR test is often used in the capability test to the whole piece of battery, and the utility model discloses in, can adopt hot infrared procedure technique, utilize the photoelectric detection technique to collect the infrared signal of battery burst thermal radiation, convert it to the image that can supply human vision to distinguish the inside and outside temperature difference of object through the colour depth. Therefore, the thermal infrared detection technology can be used for detecting a high-temperature area and identifying the electric leakage point in the battery slices, the severity of electric leakage is judged through temperature difference and is screened, and therefore effective, intuitive and quick screening is carried out on the battery slices.

The present invention provides an embodiment, it is very special, when above-mentioned carry out capability test and screening to a plurality of battery burst, can test simultaneously the battery burst that is in same battery piece before the segmentation, in order to improve right the utility model discloses a solar module's encapsulation preparation efficiency improves the productivity.

In the embodiment of the solar cell module of the present invention shown in fig. 2a and 2b, the cutting is equal cutting, and the power of the obtained cell module 21 can be 1.5-2W higher than that of the cell module 22. That is to say, the battery pack 21 packaged by the edge piece group battery piece has obvious improvement in power compared with the battery pack 22 packaged by the middle piece group battery piece, so that the requirement of a solar battery with higher power can be met, the mismatch risk of the components in the prior art is reduced, the production reliability is improved, and the waste of raw materials is avoided.

In another embodiment of the solar cell module of the present invention, the cutting may be an unequal cutting. If a plurality of 210mmx210mm solar cell whole pieces are divided according to the ratio of 1:1.5:1, each cell whole piece is divided to obtain two side pieces of 60mmx210mm and a middle piece of 90mmx210 mm. Further, all 60mmx210mm side pieces and all 90mmx210mm middle pieces can be packaged after performance testing and screening according to the above steps, so as to obtain two groups of battery assemblies with different sizes and different powers; or a 60mmx210mm side piece and a 90mmx210mm middle piece are packaged after being tested and screened according to the performance test, so as to meet the size and power requirements of different solar cell modules.

It can be understood that above-mentioned unequal partition method and collocation mode have only demonstrated exemplarily according to the utility model discloses a condition that unequal partition was cut apart among solar cell packaging method, technical personnel in the field can be according to the needs of actual production, according to the utility model discloses a can solar wafer's packaging method, and select different unequal partition mode and collocation mode to the battery whole piece of equidimension not, then various deformation all belong to the spirit and scope of the utility model.

In order to make the skilled person understand the structure of the solar cell module of the present invention better, the following is a brief description of the process for preparing the solar cell module of the present invention.

Fig. 3 is a schematic diagram of a process for manufacturing a solar cell module according to an embodiment of the present invention, such as the

solar cell modules

21 and 22 shown in fig. 2a and 2 b.

As shown in fig. 3, in step 31, a plurality of solar cell whole sheets a1, a2 … An with a size of 210mmx210mm are provided, and each solar cell whole sheet a1, a2 … An is divided into three equal parts (the dividing line is shown as a dotted line in the block diagram of step 31 in fig. 3), so as to obtain a plurality of 70mmx210mm cell fragments with the same size after division.

The utility model discloses An in An embodiment, when step 31 provides the battery integer, the utility model relates to a solar wafer's packaging method still includes the solar wafer A1 to providing, and A2 … An tests and screens, according to actual production's needs, screens the bad piece or the unusual piece of removing the battery integer that provides that performance is unusual, the size is not conform to etc to select the suitable battery integer that can satisfy actual production needs and carry out subsequent step.

Further, as shown in fig. 3, step 32 is to distinguish the positions of the battery slices on the whole battery slice before slicing, and group the battery slices according to the positions. Specifically, the battery segments including the edges of the battery full pieces (i.e., the side pieces) and the battery segments in the middle position (i.e., the middle pieces) not including the edges of the battery full pieces may be grouped separately as positions, so as to obtain the side piece group battery segments and the middle piece group battery segments.

Illustratively, as shown in fig. 3, for the battery full sheet a1, after the cutting of step 31, the battery divided sheets a11 and a13 are two side sheets from the battery full sheet a1 that include the edge of the battery full sheet a1, and the battery divided sheet a12 is a middle sheet from the battery full sheet a1 that does not include the edge of the battery full sheet a 1. Similarly, the other battery full sheets a2 … An equally divided into three parts in the same manner are also divided into two side sheets and one middle sheet. In summary, after the division in step 22, according to the present invention, a plurality of side piece group battery fragments a11, a13, a21, a23, … An1, An3, and a plurality of middle piece group battery fragments a12, a22, … An2 are obtained by the solar cell packaging method.

As described above, in an embodiment of the solar module of the present invention, after the above-mentioned whole plurality of battery pieces are cut, the performance test and the screening are performed on the plurality of battery pieces, so that the performance parameter of the battery piece contained in the solar module is higher than a predetermined threshold value. The testing method is as described above and will not be described herein.

Finally, as shown in fig. 3, step 33 is to encapsulate the battery segments of the same group, and encapsulate the battery segments a11, a13, a21, a23, … An1, An3 of the same group to obtain a battery assembly 21; and the battery slices a12, a22 and … An2 which are also the middle slice group are packaged to obtain the battery assembly 22.

It can be understood that the present invention is not limited thereto, for example, by cutting the whole battery with other sizes or performing the forms such as unequal division on the positive battery, the battery assembly with different sizes and performances can be obtained, and then the battery assembly obtained by the packaging method of the solar battery piece of the present invention is also included in the spirit and scope of the present invention.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Aspects of the present application may be embodied entirely in hardware, entirely in software (including firmware, resident software, micro-code, etc.) or in a combination of hardware and software. The above hardware or software may be referred to as "data block," module, "" engine, "" unit, "" component, "or" system. The processor may be one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), digital signal processing devices (DAPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or a combination thereof. Furthermore, aspects of the present application may be represented as a computer product, including computer readable program code, embodied in one or more computer readable media. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips … …), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD) … …), smart cards, and flash memory devices (e.g., card, stick, key drive … …).

The computer readable medium may comprise a propagated data signal with the computer program code embodied therein, for example, on a baseband or as part of a carrier wave. The propagated signal may take any of a variety of forms, including electromagnetic, optical, and the like, or any suitable combination. The computer readable medium can be any computer readable medium that can communicate, propagate, or transport the program for use by or in connection with an instruction execution system, apparatus, or device. Program code on a computer readable medium may be propagated over any suitable medium, including radio, electrical cable, fiber optic cable, radio frequency signals, or the like, or any combination of the preceding.

Similarly, it should be noted that in the preceding description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.

Although the present application has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the foregoing embodiments are merely illustrative of the present application and that various changes and substitutions of equivalents may be made without departing from the spirit of the application, and therefore, it is intended that all changes and modifications to the above-described embodiments that come within the spirit of the application fall within the scope of the claims of the application.

Claims

1. A solar cell module comprises a plurality of cell slices, wherein the cell slices are cut from a whole cell slice and from the same position of the whole cell slice.

2. The solar cell assembly of claim 1, wherein the plurality of cell segments are edge segment group cell segments or middle segment group cell segments.

3. The solar cell module as claimed in claim 2 wherein each of the cell segments of the edge group of cell segments has one cut edge and each of the cell segments of the middle group of cell segments has two cut edges.

4. The solar cell assembly of claim 1, wherein the plurality of cell segments are the same size.

5. The solar cell assembly of claim 1, wherein at least some of the plurality of cell segments differ in size.

6. The solar cell module according to claim 2, wherein the solar cell module is formed by mutually matching and packaging the side piece group cell pieces or the middle piece group cell pieces with different sizes.

7. The solar cell assembly of claim 1 wherein the performance parameter of the plurality of cell segments is above a threshold.