Patent Application
20240234597
The present U.S. non-provisional patent application claims priority to Chinese Patent Application No. 202211303308.4, filed Oct. 24, 2022, and entitled “A GRID LINE STRUCTURE WITH ANTI-BREAKAGE GLUING INTERCONNECTION, A SOLAR BATTERY AND A GLUING METHOD.” The entirety of the above-identified Chinese patent application is hereby incorporated by reference into the present U.S. non-provisional patent application.
The present disclosure mainly relates to the technical fields of solar batteries, and in particular to a grid line structure with anti-breakage gluing interconnection, a solar battery and a gluing method.
With the development of high-efficiency battery technology, the amount of silver applied in batteries such as Topcon and HJT has increased significantly. In order to reduce unit consumption, some batteries will adopt a grid-less or no-busbar battery design. In order to achieve welding, glue (insulating glue) is also used between the fingers to bond and fix the welding ribbons, and then the welding ribbons are welded to the battery fingers to form electrical contact. Although compared with the traditional welding of tin-coated ribbons and busbar Pad spot welding, the unit consumption of silver will be reduced, however, after the glue is applied between the fingers, the pressure when placing the welding ribbons and the thixotropy of the glue itself will make the glue overflow to the surroundings. When the glue overflows onto the finger, it will cause a transmission break between the welding ribbons and the fingers, which will bring greater challenges to the overall manufacturing process and also restrict industrial application.
The technical problem to be solved by the present disclosure is to provide grid line structure with anti-breakage gluing interconnection, a solar battery and a gluing method, which can solve the problem of transmission interruption caused by overflow of insulating glue in batteries, which improves the stability and reliability of solar batteries.
In order to solve the above technical problems, the present application provides a grid line structure with anti-breakage gluing interconnection, the grid line structure comprising: a plurality of fingers, the plurality of fingers extending along a first direction and arranged at intervals along a second direction; a plurality of gluing points, an adhesive applied on at least part of the plurality of gluing points is an insulating glue which form a plurality of insulating gluing points, each insulating gluing point is located between two adjacent fingers, and at least part of the plurality of insulating gluing points are located on the same straight line in the second direction which form a plurality of insulating gluing lines, the plurality of insulating gluing lines include a first insulating gluing line and a second insulating gluing line, wherein, the grid line structure has a busbar and/or the second insulating gluing line at a position adjacent to the first insulating gluing line in the first direction, and the plurality of insulating gluing points in the second insulating gluing line and the plurality of insulating gluing points in the first insulating gluing line are staggered from each other in the first direction.
In one embodiment of the present disclosure, the grid line structure has the second insulating gluing line at the position adjacent to the first insulating gluing line, and two adjacent insulating gluing points in the first insulating gluing line form a first section Z1 of the first insulating gluing line, a second section Z2 of the second insulating gluing line is formed from the first section Z1 extending to the second insulating gluing line along the first direction, wherein, the second section Z2 has one or more insulating gluing points in an interval excluding two end points of the second section Z2, in order to realize that the plurality of insulating gluing points in the second insulating gluing line and the plurality of insulating gluing points in the first insulating gluing line are staggered from each other in the first direction.
In one embodiment of the present disclosure, there are at least two fingers between any insulating gluing point in the first insulating gluing line and an adjacent insulating gluing point in the second insulating gluing line.
In one embodiment of the present disclosure, among the plurality of gluing points, the adhesive applied on at least part of the gluing points is conductive glue to form a plurality of conductive gluing points, and each conductive gluing point is located on the finger or between two adjacent fingers, and the plurality of conductive gluing points are located on the same straight line in the second direction to form a plurality of conductive gluing lines, wherein the grid line structure has the conductive gluing lines at a position adjacent to the first insulating gluing line.
In one embodiment of the present disclosure, any one of the conductive gluing points in the conductive gluing line and an adjacent insulating gluing point located in the first insulating gluing line are located on the same straight line or staggered from each other in the first direction.
In one embodiment of the present disclosure, the busbar comprises a plurality of connection points.
In one embodiment of the present disclosure, any one of the connection points on the busbar and the adjacent insulating gluing point on the first insulating gluing line are staggered from each other in the first direction.
Another aspect of the present disclosure also provides a solar battery, comprising a cell sheet and a plurality of welding ribbons, at least one surface of the cell sheet has a grid line structure according to any one embodiment of the present disclosure, and at least part of the welding ribbons are welded and fixed to a plurality of fingers along a first insulating gluing line in the grid line structure.
Another aspect of the present disclosure also provides an anti-breakage gluing method for no-busbar solar batteries, comprising the following steps: configuring a plurality of fingers, the plurality of fingers extending along a first direction and arranged at intervals along a second direction; determining a plurality of gluing points, and applying insulating glue on at least part of the plurality of gluing points to form a plurality of insulating gluing points, each insulating gluing point is located between two adjacent fingers, and at least part of the plurality of insulating gluing points are located on the same straight line in the second direction to form a plurality of insulating gluing lines, the plurality of insulated gluing lines include a first insulating gluing line and a second insulating gluing line, wherein there is a busbar and/or the second insulating gluing line at a position adjacent to the first insulating gluing line in the first direction, and a plurality of insulating gluing points in the second insulating gluing line and a plurality of insulating gluing points in the first insulating gluing line are staggered from each other in the first direction; bonding and fixing a plurality of welding ribbons along the plurality of insulating gluing lines; and welding and fixing the plurality of welding ribbons on the plurality of fingers.
Another aspect of the present disclosure also provides an anti-breakage gluing method for busbar solar batteries, comprising the following steps: configuring a plurality of fingers, the plurality of fingers extending along a first direction and arranged at intervals along a second direction; determining a plurality of gluing points, and applying insulating glue on at least part of the plurality of gluing points to form a plurality of insulating gluing points, each insulating gluing point is located between two adjacent fingers, and at least part of the plurality of insulating gluing points are located on the same straight line in the second direction to form a plurality of insulating gluing lines, the plurality of insulated gluing lines include a first insulating gluing line, wherein there are busbars at a position adjacent to the first insulating gluing line in the first direction, and a plurality of connecting points in the busbars and a plurality of insulating gluing points in the first insulating gluing line are staggered from each other in the first direction; bonding and fixing a plurality of welding ribbons along the plurality of insulating gluing lines and a plurality of busbars; and welding and fixing the plurality of welding ribbons on the plurality of fingers.
Compared with the prior art, the present disclosure has the following advantages: by optimizing and adjusting the design of the gluing position, the present disclosure enables the insulating glue on adjacent gluing lines to be arranged staggered in the extension direction of the fingers, thereby when manufacturing solar batteries, even if the insulating glue overflows onto the fingers, there will be no interruption in the transmission of the fingers; at the same time, the grid lines of the present disclosure can be used in solar batteries without busbars or batteries with spaced busbars, which can reduce silver paste consumption and improving the stability and reliability of solar batteries while controlling costs.
The drawings are included to provide a further understanding of the present application, and they are included and constitute a part of the present application, the drawings show the embodiments of the present application, and serving to explain the principles of the present application together with the description. In the drawings:
In order to illustrate the technical solutions in the embodiments of the present application more clearly, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.
As indicated in this application and claims, the terms “a”, “an”, “a kind of” and/or “the” do not specifically refer to the singular and may include the plural unless the context clearly indicates an exception. Generally speaking, the terms “comprising” and “including” only suggest the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also contain other steps or elements.
The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the authorized specification. In all embodiments shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent drawings.
In the description of the present application, it should be understood that orientation words such as “front, back, up, down, left, right”, “landscape, portrait, vertical, horizontal” and “top, bottom” etc. indicating the orientation or positional relationship is generally based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, in the absence of a contrary statement, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the scope of protection of this application; the orientation words “inside and outside” refer to inside and outside relative to the outline of each part itself.
For the convenience of description, spatially relative terms may be used here, such as “on . . . ”, “over . . . ”, “on the upper surface of . . . ”, “above”, etc., to describe the spatial positional relationship between one device or feature and other devices or features. It will be understood that, in addition to the orientation depicted in the drawings, the spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the drawings is turned over, devices described as “on other devices or configurations” or “above other devices or configurations” would then be oriented “beneath other devices or configurations” or “under other devices or configurations”. Thus, the exemplary term “above” can encompass both an orientation of “above” and “beneath”. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and making a corresponding explanation for the space relative description used here.
In addition, it should be noted that the use of words such as “first” and “second” to define components is only for the convenience of distinguishing corresponding components, unless otherwise stated, the above words have no special meanings, and therefore cannot be construed as limiting the protection scope of the present application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant according to his or her judgment, and their detailed meanings are listed in this article described in the relevant section of the description. Furthermore, it is required that this application be understood not only by the actual terms used, but also by the meaning implied by each term.
It will be understood that when an element is referred to as being “on,” “connected to,” “coupled to” or “in contacting with” another element, it can be directly on, connected to, coupled to, or in contact with the other element, or there may be an intervening component. In contrast, when an element is referred to as being “directly on,” “directly connected to,” “directly coupled to” or “directly in contacting with” another element, there are no intervening elements present. Likewise, when a first component is referred to as being “electrically contacting” or “electrically coupled to” a second component, there exists an electrical path between the first component and the second component that allows electrical current to flow. This electrical path may include capacitors, coupled inductors, and/or other components that allow current to flow, even without direct contact between conductive components.
In order to solve such technical problems, the present disclosure proposes anti-breakage gluing grid line structure 20 with reference to
In this embodiment, the insulating gluing line 220 includes multiple insulating gluing points 22. Taking the insulating gluing point 221 as an example, the insulating gluing point 222 and the insulating gluing point 221 are the two adjacent insulating gluing points, that is, the points located on the adjacent insulating gluing lines 220 and 220′, and are the closest to each other. As can be seen in
In this embodiment, the insulating gluing line 220 is defined as the first insulating gluing line, and the gluing line 220′ is defined as the second insulating gluing line. The two adjacent insulating gluing points 221 and 223 included in the first insulating gluing line 220 form a first section Z1 of the first insulating gluing line 220; extending from the first section Z1 along the first direction X to the second insulating gluing line 220′, it forms a second section Z2 of the second insulating gluing line 220′, and there is one insulating gluing point 222 in the interval of the second section Z2 excluding its two end points. In this embodiment, each such second section Z2 has one insulating gluing point in the interval excluding the two end points of the second section Z2, but the present disclosure is not limited to this. In other embodiments, there may be more insulating gluing points in such second section, thereby ensuring that no circuit breakage caused by glue overflow will occur after gluing in all planes on the front or back of the cell sheet.
It can be understood that
After gluing according to the grid line structure 20 shown in
In the embodiment shown in
Referring first to
In addition, in the embodiment shown in
In addition,
In the embodiments described above with reference to
Furthermore, there are a plurality of connection points 630 on the busbar 63, which are commonly understood as busbar pad points, for providing welding positions between the welding ribbons and the busbar 63. As can be seen in
Different embodiments of the grid line structure with anti-breakage gluing interconnection proposed by the present disclosure have been described above with reference to
Another aspect of the present disclosure provides a solar battery, which comprises a cell sheet and a plurality of welding ribbons, at least one surface (front/back) of the cell sheet has grid line structure with anti-breakage gluing interconnection proposed by various embodiments of the present disclosure. During assembly, the welding ribbons can be welded and fixed along the gluing lines in the grid line structure with multiple fingers (for example, refer to the pattern shown in
In addition, the present disclosure also proposes a gluing method 70 and a gluing method 80 for a solar battery respectively with reference to
According to
step 71 is configuring a plurality of fingers, the plurality of fingers extending along a first direction and arranged at intervals along a second direction;
step 72 is determining a plurality of gluing points, and applying insulating glue on at least part of the plurality of gluing points. It is noted that when performing this step, each insulating gluing point is located between two adjacent fingers, and at least part of the plurality of insulating gluing points are located on the same straight line in the second direction to form a plurality of insulating gluing lines, the plurality of insulated gluing lines include a first insulating gluing line and a second insulating gluing line, wherein there is a busbar and/or the second insulating gluing line at a position adjacent to the first insulating gluing line in the first direction, and a plurality of insulating gluing points in the second insulating gluing line and a plurality of insulating gluing points in the first insulating gluing line are staggered from each other in the first direction;
step 73 is bonding and fixing a plurality of welding ribbons along the plurality of insulating gluing lines; and
step 74 is welding and fixing the plurality of welding ribbons on the plurality of fingers.
The gluing method 70 shown in
According to
The gluing method 80 shown in
It should be supplemented that, although the anti-breakage grid line structure and gluing method of the present disclosure during the preparation of batteries can be applied with and without busbars are listed above with reference to
The basic concepts have been described above, obviously, for those skilled in the art, the above disclosure of the disclosure is only an example, and does not constitute a limitation to the present application. Although not expressly stated here, various modifications, improvements and amendments to this application may be made by those skilled in the art. Such modifications, improvements, and amendments are suggested in this application, so such modifications, improvements, and amendments still belong to the spirit and scope of the exemplary embodiments of this application.
Meanwhile, the present application uses specific words to describe the embodiments of the present application. For example, “one embodiment”, “an embodiment”, and/or “some embodiments” refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that two or more references to “one embodiment” or “an embodiment” or “an alternative embodiment” in different places in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics of one or more embodiments of the present application may be properly combined.
In the same way, it should be noted that in order to simplify the expression disclosed in the present application and help the understanding of one or more embodiments of the disclosure, in the foregoing description of the embodiments of the present application, sometimes multiple features are combined into one embodiment, drawings or descriptions thereof. However, this method of disclosure does not imply that the subject matter of the application requires more features than are recited in the claims. Indeed, embodiment features are less than all features of a single foregoing disclosed embodiment.
In some embodiments, numbers describing the quantity of components and attributes are used, it should be understood that such numbers used in the description of the embodiments use the modifiers “about”, “approximately” or “substantially” in some examples. Unless otherwise stated, “about”, “approximately” or “substantially” indicates that the stated figure allows for a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that can vary depending upon the desired characteristics of individual embodiments. In some embodiments, numerical parameters should take into account the specified significant digits and adopt the general digit reservation method. Although the numerical ranges and parameters used in some embodiments of the present application to confirm the breadth of the scope are approximate values, in specific embodiments, such numerical values are set as precisely as practicable.
Although the present application has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can also be made without departing from the spirit of the present application, therefore, as long as the changes and modifications to the above-mentioned embodiments are within the spirit of the present application, they will all fall within the scope of the claims of the present application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202211303308.4 | Oct 2022 | CN | national |
| Number | Date | Country | |
|---|---|---|---|
| 20240136450 A1 | Apr 2024 | US |
