A photovoltaic junction box and photovoltaic module

Abstract

The utility model discloses a photovoltaic junction box and photovoltaic module. The photovoltaic junction box can include: a box body, a diode arranged in the box body, and an electrical connection structure electrically connected with the diode. The electrical connection structure includes: an electrode connecting part electrically connected with the electrode of the diode, and a fixing groove electrically connected with the electrode connecting part. In the height direction of the box body, the fixing groove is a through structure from top to bottom, and the bus bar lead-out wire of the photovoltaic module extends from the lower part of the fixing groove into the fixing groove. The fixing groove and the bus bar lead-out wire therein enclose a gap for accommodating solder. The photovoltaic junction box can avoid false welding of the bus bar lead-out wire of the photovoltaic module, and improve the reliability of the electrical connection between the bus bar lead-out wire and the photovoltaic junction box.

Description

Technical Field

[0001] This utility model relates to a photovoltaic junction box and a photovoltaic module. Background Technology

[0002] In photovoltaic modules, busbar leads are typically welded to copper electrode plates on the junction box. During this welding process, the busbar leads need to pass through through-holes in the copper electrode plates. Since the extension direction of the busbar leads is perpendicular to the welding surface of the copper electrode plate, the busbar leads passing through the through-holes must be bent towards the welding surface of the copper electrode plate. External force is then used to maintain this bend, and the busbar leads are welded to the copper electrode plate at high temperatures. The current structure for welding the busbar leads and the copper electrode has two main problems. First, after the external force is removed, the bent busbar leads have a certain amount of springback, which can easily create gaps between the busbar leads and the copper electrode, leading to incomplete soldering and desoldering. Second, the busbar leads generally consist of a substrate and a solder layer that wraps around the substrate. The welding process mainly relies on the solder layer to form a solder joint with the copper electrode. Due to the springback of the bent busbar leads, the substrate of the busbar leads can easily detach from the solder layer, resulting in incomplete soldering. Utility Model Content

[0003] In view of this, the present invention provides a photovoltaic junction box and a photovoltaic module. The photovoltaic junction box can prevent the busbar leads of the photovoltaic module from being poorly soldered, and improve the reliability of the electrical connection between the busbar leads and the photovoltaic junction box.

[0004] Specifically, this utility model provides the following technical solution:

[0005] In a first aspect, this utility model provides a photovoltaic junction box, including a box body and a diode disposed within the box body. The photovoltaic junction box further includes an electrical connection structure electrically connected to the diode, wherein...

[0006] The electrical connection structure includes: an electrode connection portion electrically connected to the electrode of the diode and a fixing groove electrically connected to the electrode connection portion;

[0007] In the height direction of the box body, the fixing groove is a vertical through structure, wherein the busbar lead of the photovoltaic module extends from the lower part of the fixing groove into the fixing groove;

[0008] The fixed groove and the busbar lead wire inside it form a gap for accommodating the solder.

[0009] Secondly, this utility model provides a photovoltaic module, which includes the photovoltaic junction box provided in the first aspect embodiment above.

[0010] The above-mentioned utility model has the following advantages or beneficial effects:

[0011] The photovoltaic junction box provided in this embodiment of the utility model creates a gap that can accommodate solder between the fixed groove with its vertically penetrating structure and the busbar lead wire within the fixed groove. By filling the gap with solder, an electrical connection is achieved between the fixed groove and the busbar lead wire. Thus, an electrical connection between the busbar lead wire and the diode electrode is established through the electrode connection part, the fixed groove, and the filled solder. Since the busbar lead wire remains upright within the fixed groove, there is no need to bend it, preventing the problem of the base material separating from the solder layer. Furthermore, the filled solder, in conjunction with the fixed groove and the busbar lead wire, can effectively stabilize the busbar lead wire, reducing the risk of it detaching. This reduces the risk of poor soldering between the busbar lead wire and the photovoltaic junction box, improving the reliability of the electrical connection between the busbar lead wire and the photovoltaic junction box.

[0012] In addition, since the solder fills the gap between the fixing groove and the busbar lead wire inside, it can prevent the solder connecting the positive and negative terminals of the diode from mixing or the solder connecting the positive terminal of the diode from flowing to the electrode plate of the negative terminal of the diode or the solder connecting the negative terminal of the diode from flowing to the electrode plate of the positive terminal of the diode, thereby avoiding short circuits inside the photovoltaic junction box. Attached Figure Description

[0013] Figure 1 This is the front view of the existing junction box;

[0014] Figure 2 This is a front view of a photovoltaic junction box provided according to an embodiment of the present utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the photovoltaic junction box before the insertion of the busbar lead wire, according to an embodiment of the present utility model.

[0016] Figure 4 This is a cross-sectional structural diagram of a photovoltaic junction box before solder filling after inserting the busbar lead wire, according to an embodiment of the present utility model.

[0017] Figure 5 This is a cross-sectional structural diagram of a photovoltaic junction box after inserting the busbar lead wire and filling it with solder, according to an embodiment of the present utility model.

[0018] Figure 6 This is a top view of the fixing groove provided according to an embodiment of the present utility model.

[0019] The attached figures are labeled as follows:

[0020] 10-Box; 20-Diode; 30-Electrical connection structure; 31-Electrode connection part; 311-Through hole; 32-Fixing groove; 321-First side baffle; 3211-Baffle bar; 3212-First guide; 322-Second side baffle; 3221-Second guide; 40-Guiding structure; 50-Busband lead wire; 60-Solder; 70-Existing junction box; 71-Electrode piece; 72-Electrode piece through hole; 73-Housing shell. Detailed Implementation

[0021] like Figure 1 The existing junction box 70 shown includes a housing 73 and a diode 20 disposed within the housing 73, and two electrode plates 71 electrically connected to the positive and negative terminals of the diode 20, respectively. Each electrode plate 71 is provided with an electrode plate through hole 72. After the busbar lead 50 of the photovoltaic module passes through the electrode plate through hole 72 from the back of the existing junction box 70, the busbar lead 50 is bent toward the electrode plate 71, and the bent busbar lead 50 is electrically connected to the electrode plate 71 by welding. Since the busbar lead 50 generally includes a substrate and a solder layer covering the substrate, on the one hand, the soldering process mainly relies on the solder layer and the electrode copper sheet to form a solder joint. For the bent busbar lead 50, there is a spring force opposite to the direction of the soldering tension, which makes the substrate easy to detach from the solder layer, resulting in a cold solder joint. On the other hand, during the bending process of the busbar lead 50, gaps are easily generated between the substrate and the solder layer, resulting in poor contact between the substrate and the solder layer. In addition, even for the busbar lead 50 without a solder layer, there is still a spring force opposite to the soldering tension. This spring force can also easily cause gaps between the busbar lead 50 and the electrode sheet 71, resulting in a cold solder joint or detachment.

[0022] In addition, during the soldering process, the solder (such as solder) is easy to flow. Once the solder flows from one electrode plate 71 to another electrode plate 71, it will cause a short circuit inside the junction box.

[0023] In order to solve the above-mentioned problems of the existing junction box 70, this utility model provides a photovoltaic junction box with a novel structure and a photovoltaic module using the photovoltaic junction box.

[0024] In this embodiment of the utility model, "upper" and "lower," "front" and "back" are relative. Generally speaking, the front of the photovoltaic junction box is considered upper. Therefore, the side or end of any structure closest to the front of the photovoltaic junction box is the upper part of that structure, and the side or end of any structure closest to the back of the photovoltaic junction box (which is also the side or end furthest from the front of the photovoltaic junction box) is the lower part of that structure. For example, Figure 2The back of the photovoltaic junction box, as shown in the diagram, generally refers to the side of the junction box that is in contact with the back of the photovoltaic module after the junction box is installed. Figure 2 The "front" of the photovoltaic junction box, as shown, generally refers to the side of the junction box furthest from the photovoltaic module after it has been installed. Correspondingly, the lower part of the mounting groove 32 is near the back of the photovoltaic junction box, and the upper part of the mounting groove 32 is near the front of the photovoltaic junction box.

[0025] Figure 2 The height direction H involved in the indicated embodiments of this utility model generally refers to the distance from the back of the photovoltaic junction box to the front of the photovoltaic junction box or from the front of the photovoltaic junction box to the back of the photovoltaic junction box.

[0026] The specific structure of the photovoltaic junction box with the novel structure provided in the embodiments of this utility model will be described in detail below.

[0027] in, Figure 2 This is a front view of a photovoltaic junction box provided according to an embodiment of the present utility model; Figure 3 This is a cross-sectional structural diagram of the photovoltaic junction box before the insertion of the busbar lead wire, according to an embodiment of the present utility model. Figure 4 This is a cross-sectional structural diagram of a photovoltaic junction box before solder filling after inserting the busbar lead wire, according to an embodiment of the present utility model. Figure 5 This is a cross-sectional structural diagram of a photovoltaic junction box after inserting the busbar lead wire and filling it with solder, according to an embodiment of the present utility model. Figure 6 This is a top view of the fixing groove provided according to an embodiment of the present utility model.

[0028] Specifically, such as Figures 2 to 5 As shown, the photovoltaic junction box provided in this embodiment of the present invention may include: a box body 10 and a diode 20 disposed within the box body 10.

[0029] The structure or shape of the box 10 may be the same as or different from the structure or shape of the housing 73 of the existing junction box 70. The specific structure and shape of the box 10 are not limited in the structure provided in this utility model embodiment.

[0030] The photovoltaic junction box provided in this embodiment of the utility model includes, in addition to the box body 10 and the diode 20, as follows: Figures 2 to 5 As shown, the photovoltaic junction box may further include an electrical connection structure 30 electrically connected to the diode 20. The electrical connection structure 30 may include an electrode connection portion 31 electrically connected to the electrode of the diode 20 and a fixing groove 32 electrically connected to the electrode connection portion 31.

[0031] In the height direction of box 10 (e.g.) Figure 2In the height direction H shown, the fixing groove 32 is a vertically continuous structure, wherein the busbar lead 50 of the photovoltaic module extends from the lower part of the fixing groove 32 into the fixing groove 32; the fixing groove 32 and the busbar lead 50 therein form a gap for accommodating the solder 60.

[0032] Both the fixing groove 32 and the electrode connection part 31 mentioned above are made of conductive metal material.

[0033] Furthermore, the fixing groove 32 and the busbar lead 50 inside it are fixedly connected by solder 60 filled in the gap.

[0034] By filling the gap with solder 60, the busbar lead 50 can be fixed in the fixing groove 32 with the help of solder 60, and direct or indirect electrical connection between the busbar lead 50, solder 60, fixing groove 32 and electrode connection part 31 can be realized. The electrode connection part 31 is electrically connected to the electrode of diode 20, thereby realizing the electrode connection between busbar lead 50 and diode 20.

[0035] It is worth noting that the fixing groove 32 involved in this utility model embodiment is a through structure, which generally means that the fixing groove 32 has an upper opening and a lower opening, and the upper opening and the lower opening are interconnected.

[0036] Because the fixing slot 32 has a through-type structure, the busbar lead 50 extends from the lower part of the fixing slot 32 into the fixing slot 32 and remains upright. In other words, the busbar lead 50 will not bend within the housing 10, thus avoiding the occurrence of springback force. In addition, the solder 60 fills the space between the fixing slot 32 and the busbar lead 50. On the one hand, the solder 60 can effectively and firmly secure the busbar lead 50 within the fixing slot 32, forming a stable and reliable electrical connection between the busbar lead 50 and the fixing slot 32, avoiding cold solder joints and desoldering. On the other hand, for the busbar lead 50, which includes the substrate and the solder layer surrounding the substrate, the solder 60 presses the solder layer of the busbar lead 50 towards the substrate, preventing the substrate of the busbar lead 50 from detaching from the solder layer, thus improving the reliability of the electrical connection and conductivity of the busbar lead 50.

[0037] As can be seen from the above, the photovoltaic junction box provided in this embodiment of the present invention, through the fixed groove 32 with its vertically penetrating structure and the busbar lead 50 within the fixed groove 32, creates a gap that can accommodate solder. By filling the gap with solder 60, an electrical connection can be achieved between the fixed groove 32 and the busbar lead 50. Thus, through the electrode connection part 31, the fixed groove 32, and the filled solder 60, an electrical connection is established between the busbar lead 50 and the electrode of the diode 20. The busbar leads 50 remain upright within the fixing groove 32, eliminating the need to bend them. This prevents the base material from separating from the solder layer. Furthermore, the filling solder 60 works in conjunction with the fixing groove 32 and the busbar leads 50 to securely hold them in place, reducing the risk of them detaching. This, in turn, lowers the risk of poor soldering between the busbar leads 50 and the photovoltaic junction box, improving the reliability of the electrical connection between them.

[0038] In addition, since the solder 60 fills the gap between the fixed groove 32 and the busbar lead 50 therein, that is, the solder 60 is confined within the fixed groove 32, the solder flow is prevented. This can prevent the solder connecting the positive and negative terminals of the diode from mixing or the solder connecting the positive terminal of the diode from flowing to the negative terminal electrode or vice versa, thereby preventing short circuits inside the photovoltaic junction box.

[0039] Furthermore, the aforementioned solder 60 solidification generally involves the molten solder 60 (such as solder) solidifying after condensation, thus achieving the welding of the busbar lead-out line to the fixing groove 32. This is a completely different process from existing methods that use welding means (such as laser welding, argon arc welding, etc.) to first melt the solder and then cool and solidify the solder layer on the busbar lead-out line 50. The structure provided by this utility model eliminates the need for the busbar lead-out line 50 to undergo high welding temperatures, preventing damage to the busbar lead-out line 50 and ensuring the integrity of the base material and solder layer of the busbar lead-out line 50, thereby further improving the reliability of the electrical connection between the busbar lead-out line 50 and the fixing groove 32.

[0040] The core improvement of the photovoltaic junction box provided in this embodiment of the present invention lies in the electrical connection structure 30. The following will describe in detail the electrode connection portion 31, the fixing groove 32, and the relationship between the electrode connection portion 31 and the fixing groove 32 included in the electrical connection structure 30 of this embodiment of the present invention.

[0041] For the electrode connection portion 31, such as Figure 2As shown, the electrode connection part 31 is generally a plate-shaped structure. By setting the electrode connection part 31 with a plate-shaped structure, it can be more securely placed inside the housing 10 and can better support the diode 20 and the fixing groove 32, ensuring a stable electrical connection with the diode 20 and the fixing groove 32.

[0042] Furthermore, the electrode connection portion 31 is provided with a through hole 311, which is vertically continuous. The through hole 311 allows the busbar lead-out wire 50 to pass through, meaning the busbar lead-out wire 50 can enter the fixing groove 32 through the through hole 311. The position of the through hole 311 on the two electrode connection portions 31 can be determined based on the spacing between the two busbar lead-out wires 50 on the photovoltaic module; the specific position of the through hole 311 on the electrode connection portion 31 is not limited here.

[0043] Among them, such as Figures 2 to 5 As shown, the fixing groove 32 is generally located above the electrode connection part 31 (i.e., on the side of the electrode connection part 31 near the front of the photovoltaic junction box), and the lower opening of the fixing groove 32 is opposite to the through hole 311. Based on this structure, the busbar lead wire 50 can extend from the through hole 311 of the electrode connection part 31 to the lower opening of the fixing groove 32, and enter the fixing groove 32 from the lower opening of the fixing groove 32.

[0044] Furthermore, the fixing groove 32 and the electrode connection part 31 are generally fixedly connected (such as by welding, screws, etc.). Preferably, the fixing groove 32 and the electrode connection part 31 are an integral structure. This integral structure allows for better alignment of the lower opening of the fixing groove 32 with the through hole 311 of the electrode connection part 31. Specifically, this integral structure is generally produced by manufacturing the fixing groove 32 and the electrode connection part 31 under the same mold, and there are no connection marks at the connection position of the fixing groove 32 and the electrode connection part 31.

[0045] For the fixed slot 32, such as Figures 2 to 6 As shown, the lower opening of the fixing groove 32 is smaller than its upper opening. By limiting the lower opening of the fixing groove 32 to be smaller than its upper opening, on the one hand, the fixing groove 32 can better support the solder 60, reducing or even preventing the solder 60 from flowing out of the lower opening; on the other hand, the solder 60 is filled into the fixing groove 32 from the upper opening, ensuring that the solder 60 can fill the gap between the fixing groove 32 and the busbar lead-out line 50 inside. In addition, the upper opening also makes it easier to observe the situation of the busbar lead-out line 50 inside the fixing groove 32.

[0046] More specifically, such as Figures 2 to 6As shown, the fixing groove 32 may include two opposing first side baffles 321 and two opposing second side baffles 322, wherein the first side baffles 321 are opposite to the main surface of the busbar lead-out line 50 extending into the fixing groove 32, and the second side baffles 322 are opposite to the side surface of the busbar lead-out line 50; the two first side baffles 321 and the two second side baffles 322 form a vertically continuous structure; at least one first side baffle 321 is movably connected to the two second side baffles 322; when the target first side baffle movably connected to the second side baffle 322 is subjected to pressure toward the fixing groove 32, the target first side baffle and the second side baffle 322 engage, and the side surface of the target first side baffle is in contact with the side surface of the second side baffle.

[0047] It is worth noting that the target first side baffle involved in this embodiment of the utility model is one of two first side baffles 321. The first side baffle 321 that is movably connected to the second side baffle 322 is defined as the target first side baffle. Figures 2 to 5 An exemplary illustration shows a fixed groove 32 with only one first side baffle 321 movably connected to the second side baffle 322. Figures 2 to 5 In the structure shown, there is only one target first side baffle on a fixed groove 32. If both first side baffles 321 on a fixed groove 32 are movably connected to the second side baffle 322, then both first side baffles 321 are target first side baffles.

[0048] After the first side baffle and the second side baffle 322 of the target are engaged, the two first side baffles 321 and the two opposite second side baffles 322 of the fixing groove 32 form a funnel structure with a rectangular or similar rectangular cross-section, that is, the lower opening of the fixing groove 32 is smaller than its upper opening and is similar to the shape of a funnel.

[0049] By setting at least one first side baffle 321 and two second side baffles 322 in a movable connection, before inserting the busbar lead wire 50 into the fixing slot 32, the target first side baffle connected to the second side baffle 322 is moved away from the second side baffle 322, leaving sufficient operating space for operating the busbar lead wire 50 and facilitating the operation of the busbar lead wire 50.

[0050] After inserting the busbar lead 50 into the fixing slot 32, the target first side baffle is engaged with the second side baffle 322, so that the two first side baffles 321 and the two second side baffles 322 cooperate to prevent the filler solder 60 from flowing into the electrode connection part 31.

[0051] It is worth noting that applying pressure towards the fixed groove 32 to the first side baffle of the target can be done manually or automatically by the equipment.

[0052] Understandably, Figures 2 to 6The first side baffle 321 of a fixing groove 32 is shown as movably connected to the second side baffle 322, based on which the other first side baffle 321 may also be configured to be movably connected to the second side baffle 322.

[0053] against Figures 2 to 6 The diagram shows a structure in which a first side baffle 321 in a fixed groove 32 is movably connected to a second side baffle 322. The first side baffle 321, which is movably connected to the second side baffle 322, is generally located on the side away from the diode 20, so as to avoid the opening and closing of the first side baffle 321, which is movably connected to the second side baffle 322, from affecting the diode 20.

[0054] It is worth noting that the side of the first side baffle 321, which is movably connected to the second side baffle 322, and the side of the second side baffle 322 are interference-fitted. Utilizing the principle of metal deformation, the first side baffle 321, which is movably connected to the second side baffle 322, ultimately reaches its final position (e.g., ...). Figure 4 and Figure 5 After the first side baffle 321, which is movably connected to the second side baffle 322, is positioned as shown, it cannot spring back to its initial position. It is worth noting that since both the first side baffle 321 and the second side baffle 322 in the fixing groove 32 are made of metal, after the solder 60 is filled into the fixing groove 32, the solder 60 can also form a fixed connection with the first side baffle 321 and the second side baffle 322. The interference fit between the side of the first side baffle 321 and the side of the second side baffle 322, and the fixed connection formed by the solder 60 with the first side baffle 321 and the second side baffle 322, can reduce the risk of separation between the second side baffle 322 and the first side baffle 321, ensuring the reliability of the fixed connection between the solder 60 and the first side baffle 321 and the second side baffle 322. This allows the busbar lead 50 to form a stable and reliable electrical connection with the electrical connection structure 30.

[0055] Furthermore, in the structure provided in the embodiments of this utility model, such as Figures 2 to 6 As shown, a first guide member 3212 is provided on the side of the first side baffle of the target; a second guide member 3221 is provided on the side of the second side baffle 322. The first guide member 3212 and the second guide member 3221 cooperate to guide the first side baffle of the target and the second side baffle 322 to engage. The first guide member 3212 is a guide post; the second guide member 3221 is a guide groove; or, the first guide member 3212 is a guide groove; the second guide member 3221 is a guide post, to improve the reliability, flexibility, and operability of the engagement between the first side baffle of the target and the second side baffle 322.

[0056] Furthermore, in the preferred embodiments provided by this utility model, such as Figures 2 to 6 As shown, baffles 3211 are respectively provided on the inner sidewalls of the two first side baffles 321 at opposite positions. The baffles 3211 on the two first side baffles 321 abut against the two main surfaces of the busbar lead-out line 50. The baffles 3211 cooperate with the busbar lead-out line 50 to form a closed area at the bottom of the fixing groove 32, which can prevent the solder 60 from flowing out from the bottom opening of the fixing groove 32, thereby further improving the reliability of the electrical connection between the busbar lead-out line 50 and the fixing groove 32, and also preventing short circuit problems caused by the solder 60 flowing out. In addition, the baffles 3211 can fix the busbar lead-out line 50 and the fixing groove 32 in the unsoldered state, thereby restricting the relative movement between the busbar lead-out line 50 and the fixing groove 32.

[0057] Preferably, the baffle 3211 is open near the lower part of the fixing groove 32. This is to leave enough space above the baffle 3211 to hold the solder 60, ensuring an adequate amount of solder 60, thereby further improving the reliability of the electrical connection between the busbar lead 50 and the fixing groove 32.

[0058] Furthermore, regarding the fixing groove 32, the second side baffle 322 of the fixing groove 32 abuts against the side of the busbar lead 50. On the one hand, the second side baffle 322 can limit the side of the busbar lead 50 to prevent the busbar lead 50 from shaking in the fixing groove 32. On the other hand, it can ensure that the busbar lead 50 is in the middle position of the two first side baffles 321, so that the two main surfaces of the busbar lead 50 and their corresponding first side baffles 321 respectively enclose a space that can be filled with solder 60, so as to further improve the reliability of the electrical connection between the busbar lead 50 and the fixing groove 32.

[0059] In addition to including the housing 10 and the diode 20, such as Figures 3 to 5 As shown, the photovoltaic junction box may also include a guide structure 40, which is connected to the fixing groove 32 and is used to guide the busbar lead wire 50 into the fixing groove 32.

[0060] Furthermore, this embodiment of the invention also provides a photovoltaic module. The photovoltaic module may include the photovoltaic junction box provided in any of the above embodiments.

[0061] The application of photovoltaic junction boxes in photovoltaic modules is explained in detail below.

[0062] Specifically, the busbar lead 50 of the photovoltaic module is guided from the back of the photovoltaic junction box through the guide structure 40 and passes through the lower opening of the fixing groove 32 into the fixing groove 32. The busbar lead 50 abuts against the two second side baffles 322 of the fixing groove 32. Then, pressure is applied towards the fixing groove 32 to the first side baffle 321, which is movably connected to the second side baffles 322. The side of the first side baffle 321 engages with the side of the second side baffle 322. At this time, the retaining strip 3211 on the first side baffle 321 abuts against the main surface of the busbar lead 50. Afterward, solder 60 is poured into the fixing groove 32 through the upper opening of the fixing groove 32 and the solder 60 is cured, so that the busbar lead 50 and the fixing groove 32 form a stable and reliable electrical connection. The solder 60 is evenly distributed around the busbar lead 50.

[0063] The above steps are provided only to help understand the method, structure, and core idea of ​​this utility model. For those skilled in the art, various improvements and modifications can be made to this utility model without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A photovoltaic junction box, comprising a box body (10) and a diode (20) disposed within the box body (10), characterized in that, The photovoltaic junction box further includes an electrical connection structure (30) electrically connected to the diode (20), wherein, The electrical connection structure (30) includes: an electrode connection portion (31) electrically connected to the electrode of the diode (20) and a fixing groove (32) electrically connected to the electrode connection portion (31). In the height direction of the box (10), the fixing groove (32) is a vertical through structure, wherein the busbar lead (50) of the photovoltaic module extends from the lower part of the fixing groove (32) into the fixing groove (32); The fixed groove (32) and the busbar lead wire (50) therein form a gap for accommodating the solder (60).

2. The photovoltaic junction box according to claim 1, characterized in that, The fixing groove (32) includes two opposing first side baffles (321) and two opposing second side baffles (322), wherein the first side baffles (321) are opposite to the main surface of the busbar lead-out line (50) extending into the fixing groove (32), and the second side baffles (322) are opposite to the side surface of the busbar lead-out line (50); The two first side baffles (321) and the two second side baffles (322) enclose the vertical through structure; At least one of the first side baffles (321) is movably connected to two of the second side baffles (322); When the target first side baffle, which is movably connected to the second side baffle (322), is subjected to pressure toward the fixed groove (32), the target first side baffle engages with the second side baffle (322), and the side of the target first side baffle is in contact with the side of the second side baffle (322).

3. The photovoltaic junction box according to claim 2, characterized in that, The inner sidewalls of the two first side baffles (321) are respectively provided with baffles (3211) at opposite positions, and the baffles (3211) located on the two first side baffles (321) abut against the two main surfaces of the busbar lead-out line (50).

4. The photovoltaic junction box according to claim 3, characterized in that, The stop bar (3211) is located near the lower opening of the fixing groove (32).

5. The photovoltaic junction box according to any one of claims 2 to 4, characterized in that, The second side baffle (322) abuts against the side of the busbar lead-out line (50).

6. The photovoltaic junction box according to claim 2, characterized in that, A first guide (3212) is provided on the side of the first side baffle of the target. The second side baffle (322) is provided with a second guide (3221) on its side. The first guide (3212) cooperates with the second guide (3221) to guide the target first side baffle to engage with the second side baffle (322).

7. The photovoltaic junction box according to claim 6, characterized in that, The first guide member (3212) is a guide post; the second guide member (3221) is a guide groove; or, The first guide member (3212) is a guide groove; the second guide member (3221) is a guide post.

8. The photovoltaic junction box according to claim 1, characterized in that, The fixing groove (32) is disposed above the electrode connection part (31); The electrode connection part (31) includes a through hole (311). The lower opening of the fixing groove (32) is opposite to the through hole (311).

9. The photovoltaic junction box according to any one of claims 1 to 4 and 6 to 8, characterized in that, The lower opening of the fixing groove (32) is smaller than its upper opening; And / or, The fixing groove (32) and the electrode connection part (31) are an integral structure; And / or, The fixing groove (32) and the busbar lead wire (50) therein are fixedly connected by solder (60) filling the gap; And / or, The electrode connection part (31) has a plate-shaped structure.

10. A photovoltaic module, characterized in that, include: The photovoltaic junction box according to any one of claims 1 to 9.

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