Bus bar with bent outgoing line and battery panel

Abstract

The utility model relates to the technical field of photovoltaic cell processing, and provides a bus bar with a bending type outgoing line and a cell panel, the bus bar comprises a bus bar body, the bus bar body is strip-shaped and is provided with leading-out parts, the leading-out parts are arranged at two ends of the bus bar body, the leading-out parts are obliquely arranged relative to the bus bar body, and the inclination angle is an obtuse angle. The battery pieces and the plurality of battery pieces form a battery piece group, a plurality of battery piece groups are arranged, and each battery piece group is provided with a bus bar body through the technical scheme, so that the probability that the outgoing line is bent in the glass combining process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cell processing, and in particular to a bus bar with bent lead wires and a cell panel. Background Art

[0002] In the photovoltaic module manufacturing industry, double-glass modules have become a highly favored choice for solar power generation due to their excellent weather resistance, fire resistance, and extended service life. The glass lamination process is a crucial step in the production of double-glass modules, involving laminating the backplane glass with the encapsulation material, cells, and front glass to form the complete module structure. However, during this process, the handling of lead wires has always been a key factor affecting production efficiency and product quality. Traditional busbar lead wires typically adopt a right-angle bend design, where the lead wires are bent vertically from the surface of the cell and then extended to the external connection point. Although this right-angle bend design is simple, it presents significant problems during the glass lamination process.

[0003] When the back glass is pressed down during the lamination process, the right-angled lead wires, perpendicular to the direction of glass movement, are easily compressed. The weight and pressure of the back glass can cause the lead wires to bend or even be damaged, especially at the bend where the lead wire contacts the glass. This risk is particularly significant due to stress concentration, which can not only easily cause physical deformation of the lead wires but also accelerate material fatigue over long-term use, reducing the electrical performance and mechanical strength of the lead wires.

[0004] If the lead wires are bent or damaged during the glazing process, it will directly affect the progress of subsequent workstations such as welding, testing, and packaging. Additional repair or replacement work is required on the production line, which not only extends the production cycle, but also increases production costs and reduces production efficiency.

[0005] Therefore, finding a solution that can reduce the chance of lead wires being bent during the glass bonding process has become the key to improving the production efficiency and product quality of double-glass modules. Utility Model Content

[0006] The utility model provides a bus bar and a solar panel with bent lead wires, which reduce the probability of the lead wires being bent during the glass bonding process.

[0007] The technical solution of the utility model is as follows: A busbar with bent lead wires, comprising:

[0008] The bus bar body is in a strip shape and has lead-out parts. The lead-out parts are located at both ends of the bus bar body. The lead-out parts are arranged obliquely relative to the bus bar body, and the inclination angle is an obtuse angle.

[0009] Optionally, the tilt angle is specifically 100°~115°.

[0010] The solar panel includes a busbar with bent lead wires and solar cells, wherein a plurality of solar cells form a solar cell group, and each solar cell group is provided with a busbar body.

[0011] A solar panel, comprising:

[0012] The back panel glass is arranged on one side of the battery sheet and has an insertion hole. There are multiple insertion holes, and the multiple insertion holes are arranged at intervals in the middle of the back panel glass.

[0013] Optionally, the insertion hole is strip-shaped or trapezoidal.

[0014] Optionally, the insertion hole is trapezoidal, the upper part of the trapezoid is the upper opening, the lower part is the lower opening, the diameter of the lower opening is greater than the distance length between the adjacent lead-out parts of two adjacent busbar bodies, and the diameter of the upper opening is greater than 2 / 3 of the distance length between the adjacent lead-out parts of two adjacent busbar bodies.

[0015] Optionally, the insertion hole is in a bar shape, and a diameter of the insertion hole is greater than 2 / 3 of the length of the distance between adjacent lead-out portions of two adjacent busbar bodies.

[0016] Optionally, it also includes:

[0017] Lighting glass, the lighting glass is arranged on the other side of the battery cell.

[0018] Optionally, adjacent lead-out portions of two adjacent busbar bodies together constitute an insertion portion, the insertion portion is inserted into the insertion hole, and the cross-section of the insertion portion is trapezoidal.

[0019] Optionally, it also includes:

[0020] A junction box is provided on the outside of the back panel glass and has a junction portion, and the junction portion is used to be electrically connected to the lead-out portion.

[0021] The working principle and beneficial effects of the utility model are as follows:

[0022] In the present invention, the busbar body adopts a strip-shaped structure and serves as a conductive carrier for connecting the battery cells. Its main function is to collect current and lead the current to the external circuit. The lead-out portion is arranged at an inclination relative to the main plane of the busbar body, and the inclination angle is designed to be an obtuse angle. The lead-out portion inclined at an obtuse angle can effectively disperse the vertical pressure exerted on the lead-out wire by the back panel glass during the pressurization process, avoids the problem of stress concentration at the right-angle bend, and significantly reduces the probability of the lead-out wire being bent or damaged. Enhanced electrical performance: The obtuse angle design reduces the increase in resistance caused by the deformation of the lead-out wire while ensuring the reliability of the electrical connection, thereby maintaining the efficient electrical performance of the component. The lead-out portion inclined at an obtuse angle can better adapt to the spatial layout inside the component, avoids the spatial conflicts that may be caused by right-angle bends, and improves the overall design flexibility and compactness of the component. It reduces the repair or replacement work, shortens the production cycle, and at the same time ensures the electrical performance and mechanical strength of the component, providing a more optimized production process for the photovoltaic component manufacturing industry and promoting the development and progress of industry technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of the utility model (the insertion hole is a bar);

[0025] Figure 2 This is a partial structural diagram of the utility model (the insertion hole is trapezoidal).

[0026] In the figure: 1. Busbar body; 101. Lead-out part; 2. Battery cell; 3. Back panel glass; 301. Insertion hole; 302. Upper opening; 303. Lower opening; 4. Lighting glass; 5. Insertion part; 6. Junction box; 601. Wiring part. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0028] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0029] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0030] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] Example 1

[0032] Reference Figure 1 , which is the first embodiment of the present utility model, proposes a busbar with a bent lead wire, including: a busbar body 1, the busbar body 1 is strip-shaped, and has a lead-out portion 101, the lead-out portion 101 is located at both ends of the busbar body 1, and the lead-out portion 101 is arranged obtusely relative to the busbar body 1, and the inclination angle is an obtuse angle.

[0033] In this embodiment, the busbar 1 employs a strip-shaped structure, serving as a conductive carrier connecting the solar cells 2. Its primary function is to collect and conduct current to the external circuit. The lead portion 101 is tilted relative to the main plane of the busbar 1, and the tilt angle is designed to be obtuse. The obtuse-angled lead portion 101 effectively disperses the vertical pressure exerted on the lead wires by the backplane glass 3 during pressurization, avoiding stress concentration at the right-angle bend and significantly reducing the probability of the lead wires being bent or damaged. Enhanced electrical performance: While ensuring reliable electrical connections, the obtuse-angle design reduces the increase in resistance caused by lead wire deformation, thereby maintaining the module's efficient electrical performance. The obtuse-angled lead portion 101 better adapts to the module's internal spatial layout, avoiding potential spatial conflicts caused by right-angle bends, and improving the module's overall design flexibility and compactness. This reduces repair or replacement work, shortens production cycles, and ensures the module's electrical performance and mechanical strength. This provides a more optimized production process for the photovoltaic module manufacturing industry, promoting the development and advancement of industry technology.

[0034] Furthermore, the tilt angle is specifically 100°~115°.

[0035] In this embodiment, the inclination angle of the lead-out portion 101 is precisely set between 100° and 115°. This angle range was selected based on in-depth research on the stress characteristics of the lead-out wires during the glazing process. The lead-out wires can more effectively disperse the vertical pressure exerted on them by the back glass 3 during the glazing process, preventing excessive stress concentration at a specific point, thereby significantly reducing the risk of bending or damage to the lead-out wires.

[0036] Example 2

[0037] Reference Figure 1~Figure 2 , which is the second embodiment of the present invention, differs from the first embodiment in that it proposes a solar panel based on a busbar with bent lead wires, comprising:

[0038] The battery cells 2 , wherein a plurality of battery cells 2 form a battery cell group 2 , and each battery cell group 2 is provided with a busbar body 1 .

[0039] In this embodiment, the solar panel is composed of multiple groups of cells 2. Each group is a unit composed of several cells 2, forming the basic structure for photoelectric conversion. Each group is equipped with a busbar with bent lead wires to collect current and lead it to the external circuit. Each busbar body 1 is designed with bent lead wires, and its lead portion 101 is arranged at an angle relative to the busbar body 1, with the angle optimized to between 100° and 115°. This design significantly improves the lead wire's compressive strength during the glass bonding process, reducing the risk of production interruption, while ensuring the stability of the electrical connection and the efficient electrical performance of the component.

[0040] Furthermore, it also includes:

[0041] The back glass 3 is arranged on one side of the battery cell 2 and has an insertion hole 301 . There are multiple insertion holes 301 , and the multiple insertion holes 301 are spaced apart in the middle of the back glass 3 .

[0042] In this embodiment, the back glass 3 is positioned on one side of the cell 2 and serves as a protective layer for the photovoltaic module. Its primary function is to provide moisture, dust, and mechanical protection for the cell 2. Multiple insertion holes 301 are designed into the back glass 3. These insertion holes 301 are spaced apart in the middle of the back glass 3 and correspond to the curved lead busbars in the cell group 2. This ensures that the lead wires can pass smoothly through the back glass 3 and connect to the external circuit, while minimizing the impact on the structural integrity of the back glass 3 and the electrical performance of the module.

[0043] Furthermore, the insertion hole 301 is a trapezoid, the upper part of the trapezoid is the upper opening 302, and the lower part is the lower opening 303, the diameter of the lower opening 303 is greater than the distance between the adjacent lead-out portions 101 of two adjacent busbar bodies 1, and the diameter of the upper opening 302 is greater than 2 / 3 of the distance between the adjacent lead-out portions 101 of two adjacent busbar bodies 1.

[0044] In this embodiment, the insertion hole 301 is designed to be trapezoidal, divided into an upper opening 302 at the top and a lower opening 303 at the bottom. This trapezoidal design ensures that the lead wires have sufficient guidance and support when passing through the back glass 3. The diameter of the upper opening 302 is designed to be larger than 2 / 3 of the distance between the bent ends of the adjacent lead portions 101 of two adjacent busbar bodies 1. Figure 2 As shown, the design of the size of the upper opening 302 takes into account the space requirement of the lead wire after passing through the back glass 3, ensuring that the lead wire has enough room to move and avoiding unnecessary bending due to space limitations.

[0045] Furthermore, the adjacent lead-out portions 101 of two adjacent busbar bodies 1 together constitute an insertion portion 5 . The insertion portion 5 is inserted into the insertion hole 301 , and the cross-section of the insertion portion 5 is trapezoidal.

[0046] In this embodiment, the adjacent lead portions 101 of two adjacent busbar bodies 1 together form the insertion portion 5, which is the key component for connecting the lead wires to the insertion hole 301 of the backplane glass 3. The trapezoidal cross-section of the insertion portion 5 ensures a tighter and more stable fit with the insertion hole 301 of the backplane glass 3. The trapezoidal cross-section also helps disperse stress, improving the structural stability of the assembly and preventing unnecessary bending or damage to the lead wires as they pass through the hole.

[0047] Furthermore, it also includes: a junction box 6, which is arranged on the outside of the back glass 3 and has a junction part 601, and the junction part 601 is used to be electrically connected to the lead-out part 101.

[0048] In this embodiment, the junction box 6 is a key component in the photovoltaic module for collecting and distributing current. It is located outside the backplane glass 3 and is used to connect to the external circuit. The junction box 6 has a connection portion 601 for electrically connecting to the lead-out portion 101 of the busbar body 1. The design of the connection portion 601 must ensure reliable contact with the lead-out portion 101 to avoid electrical performance degradation caused by poor contact.

[0049] Example 3

[0050] refer to Figure 2 , which is the third embodiment of the present utility model. This embodiment is different from the second embodiment in that the insertion hole 301 is strip-shaped, and the diameter of the insertion hole 301 is greater than 2 / 3 of the length of the distance between adjacent lead-out portions 101 of two adjacent busbar bodies 1.

[0051] In this embodiment, the insertion hole 301 is designed to be strip-shaped. This shape can provide enough space for the bent lead-out busbar to pass through while maintaining the structural strength of the back panel glass 3. The diameter of the strip-shaped hole is designed to be larger than 2 / 3 of the distance between the adjacent lead-out portions 101 of two adjacent busbar bodies 1. This design takes into account the minimum gap required for the lead-out wire to pass through the back panel glass 3. Since the lead-out portion 101 is inclined, as a preferred embodiment, the inclined length is designed to be able to achieve a stable connection with the junction box 6, so it can be slightly longer than the standard length. The length of the lead-out portion 101 is slightly longer than the required minimum length, which is 3-6 mm longer. At the same time, the diameter of the strip hole can be designed to be at least 2 / 3 of the distance between adjacent lead-out portions 101. This can ensure that even if there is a dimensional error in the insertion hole 301 of the back panel glass 3 during the production process, it is smaller than the distance between adjacent lead-out portions 101. As long as it is more than 2 / 3 of the distance, although a portion of the bus bar at the bottom will be pressed, it will not affect the state of the upper end of the lead-out line extending out, thereby improving the product adaptability of the glass back panel.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A busbar with bent lead wires, characterized in that: include: A busbar body (1) is strip-shaped and has lead-out portions (101). The lead-out portions (101) are located at both ends of the busbar body (1). The lead-out portions (101) are arranged obliquely relative to the busbar body (1), and the inclination angle is an obtuse angle.

2. The busbar with bent lead wires according to claim 1, characterized in that: The tilt angle is specifically 100°~115°.

3. Solar panels, characterized in that, A busbar with bent lead wires according to any one of claims 1 to 2, further comprising: A battery cell (2), wherein a plurality of the battery cells (2) form a battery cell (2) group, wherein the battery cell (2) group comprises a plurality of battery cells (2), and each battery cell (2) group is provided with a busbar body (1).

4. The solar panel according to claim 3, characterized in that: Also includes: A back panel glass (3) is provided on one side of the battery cell (2) and has an insertion hole (301). There are a plurality of insertion holes (301), and the plurality of insertion holes (301) are spaced apart and arranged in the middle of the back panel glass (3).

5. The solar panel according to claim 4, characterized in that: The insertion hole (301) is in a strip shape or a trapezoidal shape.

6. The solar panel according to claim 5, characterized in that: The insertion hole (301) is trapezoidal, the upper portion of the trapezoid is an upper opening (302), and the lower portion is a lower opening (303), the diameter of the lower opening (303) is greater than the distance between the adjacent lead-out portions (101) of two adjacent busbar bodies (1), and the diameter of the upper opening (302) is greater than 2 / 3 of the distance between the adjacent lead-out portions (101) of two adjacent busbar bodies (1).

7. The solar panel according to claim 5, characterized in that: The insertion hole (301) is in a strip shape, and the diameter of the insertion hole (301) is greater than 2 / 3 of the length of the distance between the adjacent lead-out portions (101) of two adjacent busbar bodies (1).

8. The solar panel according to claim 3, characterized in that: Also includes: A lighting glass (4), the lighting glass (4) being arranged on the other side of the battery cell (2).

9. The solar panel according to claim 5, characterized in that: The adjacent lead-out portions (101) of two adjacent busbar bodies (1) together form an insertion portion (5), the insertion portion (5) is inserted into the insertion hole (301), and the cross section of the insertion portion (5) is trapezoidal.

10. The solar panel according to claim 6 or 7, characterized in that: Also includes: A junction box (6) is provided on the outside of the back panel glass (3) and has a junction portion (601), wherein the junction portion (601) is used for electrically connecting to the lead-out portion (101).

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