Interconnection tool
By designing a separator in the interconnect tooling to separate the solder strips of the stacked grid back contact battery string, the risk of short circuit during welding was resolved, and welding yield and efficiency were improved.
Patent Information
- Application Number
- CN202520248165.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-17
AI Technical Summary
When welding busbars, stacked grid back contact batteries are prone to short circuits due to overlap of the positive and negative electrode solder strips, which affects the welding yield.
An interconnect tooling is provided, including a tooling body and a separator, for separating two adjacent solder strips on the back contact battery string to ensure that they remain separated when soldered to the busbar to avoid short circuit.
This improved the yield of the solder strip interconnection between the busbar and the back contact battery string, reduced the risk of short circuits, and improved welding efficiency and reliability.
Smart Images
Figure CN223652637U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic cell technical field especially interconnection tool. BACKGROUND
[0002] The back contact cell is a new type of photovoltaic cell technology, which is characterized by reducing the use of silver paste to reduce costs. However, in the actual production process, the process from the battery string to the photovoltaic module is interconnected by using the welding strip, and the welding strip collects current to the bus bar and exports the current through the bus bar. Because the positive and negative electrode welding strips of the back contact cell are located on the back surface, and the number is large, the interval distance is narrow, and the positive and negative electrode welding strips are easily short-circuited when the bus bar is welded. SUMMARY
[0003] Therefore, it is necessary to provide an interconnection tool for the problem that the back contact cell in the prior art is easily short-circuited when the bus bar is welded.
[0004] The technical scheme is as follows:
[0005] On the one hand, an interconnection tool is provided, which is applied to the welding strip interconnection of the bus bar and the back contact cell string, and the interconnection tool comprises a tool body and a separation part arranged on the tool body, and the separation part is used to separate the adjacent two welding strips on the back contact cell string.
[0006] The interconnection tool in the above embodiment is used, the separation part is inserted between the adjacent two welding strips on the back contact cell string which need to be welded with the bus bar, so that the adjacent two welding strips are kept apart, and the short circuit risk is avoided during the welding process of the adjacent two welding strips and the bus bar, and the yield of the welding strip interconnection of the bus bar and the back contact cell string is improved.
[0007] The technical scheme is further described as follows:
[0008] In one of the embodiments, the number of the separation parts is at least one, and each separation part is arranged on one side of the tool body along the extension direction of the tool body.
[0009] In one of the embodiments, the separation gap is formed between the adjacent two separation parts, and the width of the separation gap along the extension direction of the tool body is matched with the width of the welding strip.
[0010] In one of the embodiments, the width of the separation gap along the extension direction of the tool body is 0.1mm to 3mm.
[0011] In one of the embodiments, the partition part is provided with a guide part away from one end of the tool body, and the guide part is used to guide the welding strip into the partition gap.
[0012] In one of the embodiments, the guide part is provided in a needle tip shape.
[0013] In one of the embodiments, the distance between two adjacent guide parts away from one end of the tool body is set to 0.7mm to 4mm.
[0014] In one of the embodiments, the width of the partition part along the extension direction of the tool body is matched with the distance between two adjacent welding strips in the back contact battery string.
[0015] In one of the embodiments, a partition gap is formed between two adjacent partition parts, and the tool body is provided with at least one auxiliary welding hole, and each auxiliary welding hole is arranged along the extension direction of the tool body and is in correspondence with each partition gap.
[0016] In one of the embodiments, the width of the partition gap along the extension direction of the tool body is set to a first width, the width of the partition part along the extension direction of the tool body is set to a second width, the auxiliary welding hole is set to a circular hole, the diameter of the circular hole is greater than the first width and less than the sum of the first width and the second width. BRIEF DESCRIPTION OF DRAWINGS
[0017] The drawings constituting a part of this application are used to provide further understanding of this application, the illustrative embodiments of this application and the description thereof are used to explain this application, and do not constitute improper limitation on this application.
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0019] Figure 1 It is a structural schematic view of the interconnection tool of one embodiment.
[0020] Figure 2 It is a structural schematic view of the interconnection tool of one embodiment. Figure 1 It is a structural schematic view of the interconnection tool in use.
[0021] Figure 3 It is a structural schematic view of the interconnection tool of another embodiment.
[0022] Explanation of reference signs:
[0023] 10. Interconnection tooling; 100. Tooling body; 200. Divider; 300. Divider gap; 400. Guide; 500. Auxiliary welding hole; 20. Welding strip. Detailed Implementation
[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0025] like Figure 1 and Figure 2 As shown, in one embodiment, an interconnecting fixture 10 is provided for interconnecting a busbar with solder strips 20 of a back contact battery string. The interconnecting fixture 10 includes a fixture body 100 and a separator 200 disposed on the fixture body 100, the separator 200 being used to separate two adjacent solder strips 20 on the back contact battery string.
[0026] In the above embodiment, the interconnecting fixture 10 is used to insert the separator 200 between two adjacent solder strips 20 that need to be welded to the busbar on the back contact battery string, so that the two adjacent solder strips 20 are kept apart, thereby ensuring that the two adjacent solder strips 20 will not overlap during the welding process with the busbar, thus avoiding the risk of short circuit and improving the yield of interconnection between the solder strips 20 of the busbar and the back contact battery string.
[0027] It should be noted that the solder strips 20 of the back contact battery string include positive solder strips and negative solder strips, which are arranged alternately in sequence, that is, one of two adjacent solder strips 20 is a positive solder strip and the other is a negative solder strip.
[0028] like Figure 1 and Figure 2 As shown, further, the number of partitions 200 is at least one, and each partition 200 extends along the extension direction of the tooling body 100 (e.g., Figure 1 The multiple separators 200 are spaced apart on one side of the tooling body 100 in the direction shown in A. In this way, multiple separators 200 can simultaneously separate multiple groups of adjacent welding strips 20, so that the busbar can be welded to multiple welding strips 20 at one time, thereby improving the interconnection efficiency between the welding strips 20 and the busbar.
[0029] It should be noted that during the interconnection process between the busbar and the solder strip 20 of the back contact battery string, the interconnection fixture 10 can be repositioned to continuously weld the busbar and the solder strip 20.
[0030] The shape of the interconnecting tool 10 can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, the shape of the interconnecting tool 10 can be the same as or similar to the shape of a comb used for combing hair.
[0031] The number of partitions 200 can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, the partitions 200 are configured as dividing teeth. The number of partitions 200 is set to 20 to 300.
[0032] like Figure 1 and Figure 2 As shown, optionally, a separation gap 300 is formed between two adjacent partitions 200, and the width of the separation gap 300 along the extension direction of the tooling body 100 is (e.g., Figure 1 The width shown in B is adapted to the width of the solder strip 20. In this way, multiple consecutive separators 200 can be inserted between multiple consecutive solder strips 20, so that two adjacent separators 200 can fix and separate the corresponding solder strips 20, ensuring that two adjacent solder strips 20 will not contact each other, effectively avoiding short circuits and improving the yield of interconnection between the solder strips 20 of the busbar and the back contact battery string.
[0033] It should be noted that the width of the separation gap 300 along the extension direction of the tooling body 100 can be flexibly adjusted according to actual needs to adapt to different specifications of welding strips 20 and improve the practicality of the interconnect tooling 10.
[0034] Specifically, in this embodiment, the width of the separation gap 300 along the extension direction of the tooling body 100 is 0.1 mm to 3 mm.
[0035] like Figure 1 As shown, in one embodiment, the end of the separator 200 away from the tooling body 100 is provided with a guide 400, which is used to guide the solder ribbon 20 into the separator gap 300. In this way, the solder ribbon 20 can smoothly enter the corresponding separator gap 300 under the guidance of the guide 400, improving the practicality of the interconnect tooling 10.
[0036] Specifically, in this embodiment, the tooling body 100, each partition 200, and each guide 400 are integrally formed. The interconnect tooling 10 is made of one or more of the following materials: silicone, polyimide, phenyl silicone rubber, polytetrafluoroethylene, and polyphenylene sulfide. This prevents the interconnect tooling 10 from being damaged by high temperatures during the welding process, giving it heat-resistant and high-temperature-resistant properties and increasing its service life.
[0037] In other implementations, the interconnect tooling 10 can also be made of other high-temperature resistant welding materials.
[0038] likeFigure 1 As shown, optionally, the guide portion 400 is provided in the shape of a needle tip. In this way, the needle-tip-shaped guide portion 400 can better extend between two adjacent solder strips 20 for isolation.
[0039] Specifically, in this embodiment, the width of each partition 200 along the extension direction of the tooling body 100 remains constant along the direction away from the tooling body 100. The width of each guide 400 along the extension direction of the tooling body 100 gradually decreases along the direction away from the tooling body 100. The width of each partition 200 and the width of each guide 400 at the end closest to the tooling body 100 are the same along the extension direction of the tooling body 100.
[0040] It should be noted that the width of the partition 200 along the extension direction of the tooling body 100 can be flexibly adjusted according to actual usage needs.
[0041] Optionally, the distance between the ends of two adjacent guide portions 400 that are away from the tooling body 100 (i.e., the needle tip of the guide portion 400) is (e.g. Figure 1 The spacing shown in C is set to 0.7mm to 4mm.
[0042] Specifically, in this embodiment, along the extending direction of the tooling body 100, the width of the partition gap 300 along the extending direction of the tooling body 100 is 0.2 mm, and the distance between the ends of two adjacent guide portions 400 away from the tooling body 100 is set to 0.7 mm. The number of partition portions 200 is set to 40.
[0043] In other embodiments, the guide portion 400 may also be configured as a guide ramp or a guide arc surface, etc.
[0044] like Figure 2 As shown, optionally, the width of the separator 200 along the extending direction of the tooling body 100 is adapted to the spacing between two adjacent solder strips 20 in the back contact battery string. In this way, it is ensured that when multiple separators 200 are correspondingly inserted between multiple solder strips 20, no interference occurs between the separators 200 and the solder strips 20, thereby improving the reliability of the interconnect tooling 10.
[0045] like Figure 3 As shown, in one embodiment, a separation gap 300 is formed between two adjacent partitions 200. The tooling body 100 is provided with at least one auxiliary welding hole 500, which is spaced apart along the extending direction of the tooling body 100 and communicates with each separation gap 300. Thus, the welding head of the welding device can extend into the auxiliary welding hole 500 and weld the welding strip 20 to the busbar, achieving precise positioning, further avoiding short circuits and welding defects, and improving the practicality of the interconnect tooling 10.
[0046] The number, shape, and size of the auxiliary welding holes 500 can be flexibly adjusted according to actual needs to adapt to different specifications of back contact battery strings.
[0047] like Figure 3 As shown, optionally, the width of the separation gap 300 along the extension direction of the tooling body 100 is set as a first width, and the width of the separation portion 200 along the extension direction of the tooling body 100 is set as a second width. The auxiliary welding hole 500 is set as a circular hole, the diameter of which is greater than the first width and less than the sum of the first width and the second width.
[0048] Specifically, in this embodiment, the axis of the auxiliary welding hole 500 is located between the two partitions 200 on both sides of the auxiliary welding hole 500. The radius of the auxiliary welding hole 500 is set to 0.3 mm to 0.4 mm.
[0049] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 should not be construed as a limitation of this application.
[0050] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0052] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0053] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0054] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.
[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0056] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. An interconnection tooling for interconnecting a busbar with a back contact battery string via solder strips (20), characterized in that, The interconnecting fixture (10) includes a fixture body (100) and a partition (200) disposed on the fixture body (100), the partition (200) being used to separate two adjacent solder strips (20) on the back contact battery string.
2. The interconnection tooling according to claim 1, characterized in that, The number of the partitions (200) is at least one, and each partition (200) is spaced apart on one side of the tooling body (100) along the extending direction of the tooling body (100).
3. The interconnection tooling according to claim 2, characterized in that, A separation gap (300) is formed between two adjacent separation portions (200), the width of which along the extension direction of the tooling body (100) is adapted to the width of the welding strip (20).
4. The interconnection tooling according to claim 3, characterized in that, The width of the separation gap (300) along the extension direction of the tooling body (100) is 0.1 mm to 3 mm.
5. The interconnection tooling according to claim 3, characterized in that, The dividing part (200) has a guide part (400) at one end away from the tooling body (100), and the guide part (400) is used to guide the welding strip (20) into the dividing gap (300).
6. The interconnection tooling according to claim 5, characterized in that, The guide portion (400) is provided in the shape of a needle tip.
7. The interconnection tooling according to claim 6, characterized in that, The distance between the ends of two adjacent guide portions (400) away from the tooling body (100) is set to 0.7 mm to 4 mm.
8. The interconnection tooling according to claim 2, characterized in that, The width of the separator (200) along the extension direction of the tooling body (100) is adapted to the spacing between two adjacent solder strips (20) in the back contact battery string.
9. The interconnection tooling according to any one of claims 2 to 8, characterized in that, A separation gap (300) is formed between two adjacent separation portions (200). The tooling body (100) is provided with at least one auxiliary welding hole (500). Each of the auxiliary welding holes (500) is spaced apart along the extension direction of the tooling body (100) and is correspondingly connected to each of the separation gaps (300).
10. The interconnection tooling according to claim 9, characterized in that, The width of the separation gap (300) along the extension direction of the tooling body (100) is set as a first width, the width of the separation portion (200) along the extension direction of the tooling body (100) is set as a second width, the auxiliary welding hole (500) is set as a circular hole, the diameter of the circular hole is greater than the first width and less than the sum of the first width and the second width.