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 module and a lifting base, the diode module is installed inside the box body; the lifting base is located at the back of the box body and is movably connected with the box body; the lifting base includes a second through hole, the second through hole is used for leading the outgoing line of the bus bar of the photovoltaic module into the box body; the lifting base is displaced in the height direction of the box body to form an adjustable accommodation space at the bottom of the box body, and the adjustable accommodation space is used for accommodating the overflow glue at the outgoing hole of the photovoltaic module. The photovoltaic junction box can avoid the influence of the overflow glue on the photovoltaic junction box, improve the stability and reliability of the installation of the photovoltaic junction box, and improve the reliability of the sealing of the outgoing hole of the photovoltaic module.

Description

Technical Field

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

[0002] Junction boxes are a crucial component of photovoltaic (PV) modules. Their primary function is to connect the internal circuitry of the PV module to the external circuitry. These junction boxes are typically glued to the backsheet of the module using adhesive, and they also seal the busbar exit holes on the backsheet. However, during the lamination process, adhesive overflow can occur at the busbar exit holes, and the amount of overflow is often uncontrollable. Excessive overflow can easily lead to improper junction box installation and poor sealing of the busbar exit holes. 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 accommodate the excess adhesive at the lead-out hole of the photovoltaic module through an adjustable accommodating space, thereby preventing the excess adhesive from affecting the photovoltaic junction box, improving the stability and reliability of the photovoltaic junction box installation, and improving the reliability of the sealing of the lead-out hole of the photovoltaic module.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] In a first aspect, this utility model embodiment provides a photovoltaic junction box, comprising: a box body, a diode module, and a lifting base, wherein...

[0006] The diode module is installed inside the housing;

[0007] The lifting base is located on the back of the box body and is movably connected to the box body;

[0008] The lifting base includes a second through hole, which is used to introduce the busbar lead wire of the photovoltaic module into the box body;

[0009] The lifting base is moved in the height direction of the box to form an adjustable accommodating space at the bottom of the box. The adjustable accommodating space is used to accommodate the excess adhesive at the lead-out holes of the photovoltaic module.

[0010] Secondly, this utility model provides a photovoltaic module, including: the photovoltaic junction box provided in the first aspect embodiment above.

[0011] The first aspect of the above-mentioned utility model has the following advantages or beneficial effects:

[0012] The photovoltaic junction box provided in this embodiment of the utility model moves its lifting base in the height direction of the box body, so that the bottom of the box body forms an adjustable accommodating space. The size of the adjustable accommodating space can be adjusted according to the amount of glue overflow at the lead-out hole of the photovoltaic module. That is, the photovoltaic junction box can meet different amounts of glue overflow through the lifting base and accommodate the glue overflow through the adjustable accommodating space, avoiding the glue overflow affecting the installation of the photovoltaic junction box. This allows the back of the box body to be stably and reliably installed on the back of the photovoltaic module, improving the stability and reliability of the photovoltaic junction box installation, and improving the reliability of the sealing of the lead-out hole of the photovoltaic module.

[0013] Furthermore, the lifting base of the photovoltaic junction box provided in this embodiment of the present invention can guide the busbar lead wire of the photovoltaic module to contact the diode module. Therefore, the photovoltaic junction box provided in this embodiment of the present invention can meet the requirements of different thicknesses of excess glue without affecting the contact between the busbar lead wire and the diode module. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the existing junction box and the excess adhesive;

[0015] Figure 2 This is a schematic diagram showing the relative relationship between the distance between the existing junction box installed on the photovoltaic module and the back of the photovoltaic module and the height of the overflow adhesive;

[0016] Figure 3 This is a front structural diagram of a photovoltaic junction box provided according to an embodiment of the present utility model;

[0017] Figure 4 This is a schematic diagram of the rear structure of the photovoltaic junction box with the lifting base in the lowest position according to an embodiment of the present utility model;

[0018] Figure 5 This is a schematic diagram of the rear structure of the photovoltaic junction box after the lifting base has been moved to face the front, according to an embodiment of the present utility model.

[0019] Figure 6 This is a schematic diagram of the rear structure of the photovoltaic junction box after removing the lifting base, according to an embodiment of the present utility model;

[0020] Figure 7 This is a schematic diagram of the limiting structure in the photovoltaic junction box according to an embodiment of the present utility model;

[0021] Figure 8 This is a structural front view of the lifting base of the photovoltaic junction box provided according to an embodiment of the present utility model;

[0022] Figure 9 This is a bottom view of the structure of the lifting base of the photovoltaic junction box according to an embodiment of the present utility model;

[0023] Figure 10 This is a first structural schematic diagram of a photovoltaic junction box installed on a photovoltaic module according to an embodiment of the present utility model;

[0024] Figure 11 This is a second structural schematic diagram of a photovoltaic junction box installed on a photovoltaic module according to an embodiment of the present utility model.

[0025] The attached figures are labeled as follows:

[0026] 10-Box body; 11-Cavity; 12-Box back plate; 13-Box cover plate; 20-Diode; 30-Electrode plate; 31-First through hole; 40-Lifting base; 41-Second through hole; 42-Intermediate baffle plate; 43-Busbar guide groove; 431-Guide plate; 44-Lifting support foot; 45-Limiting component; 46-Limiting protrusion; 51-Fixed baffle plate; 52-Limiting guide groove; 53-Side limiting plate; 531-First stop bar; 532-Second stop bar; 54-Fixed post; 60-Existing junction box; 61-Fixed back plate; 62-Fixed busbar guide groove; 63-Fixed seat; 70-Overflowing adhesive; 80-Photovoltaic module; 81-Busbar lead wire. Detailed Implementation

[0027] Existing junction box structures are generally as follows: Figure 1 As shown, from Figure 1 As can be seen, the existing junction box 60 generally includes: a fixed back plate 61 encapsulating the back of the existing junction box 60, with two fixed busbar guide grooves 62 and fixing seats 63 distributed at the four corners on the fixed back plate 61. After the existing junction box 60 is installed on the back of the photovoltaic module, the area where the overflow adhesive 70 at the lead-out holes of the photovoltaic module is located is generally the area between the two fixed busbar guide grooves 62. For example... Figure 2As shown, if the thickness H2 of the overflow adhesive 70 exceeds the thickness H1 of the mounting base 63, the mounting base 63 will not be able to contact the back of the photovoltaic module, resulting in poor installation stability and reliability of the existing junction box 60. In particular, for modules that are sensitive to moisture, such as HJT (Heterojunction with Intrinsic Thin-film), high water-blocking materials (such as butyl rubber) are filled at the lead-out holes of the photovoltaic module to enhance the sealing and water-blocking effect. This will further increase the amount and height of the overflow adhesive, further highlighting problems such as poor junction box installation and poor sealing of the lead-out holes. Specifically, when the photovoltaic junction box and photovoltaic module are fixed together with adhesive, the amount of adhesive applied to the lead-out hole area on the back of the photovoltaic junction box or photovoltaic module is fixed in the process. Generally, an increase in the amount of overflow adhesive 70 leads to an increase in the thickness H2 of the overflow adhesive 70. However, if the thickness of the adhesive is less than the thickness H2 of the overflow adhesive 70, the reliability of the fixation between the photovoltaic junction box and the back of the photovoltaic module will be reduced. This will also result in an interface between the photovoltaic junction box and the back of the photovoltaic module that is easily penetrated by moisture, leading to poor sealing between the existing junction box 60 and the photovoltaic module.

[0028] To address the aforementioned problems with existing junction boxes, this utility model provides a novel photovoltaic junction box and a photovoltaic module using the photovoltaic junction box.

[0029] 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.

[0030] in, Figure 3 This is a front structural diagram of a photovoltaic junction box provided according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the rear structure of the photovoltaic junction box with the lifting base in the lowest position according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the rear structure of the photovoltaic junction box after the lifting base has been moved to face the front, according to an embodiment of the present utility model. Figure 6 This is a schematic diagram of the rear structure of the photovoltaic junction box after removing the lifting base, according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the limiting structure in the photovoltaic junction box according to an embodiment of the present utility model; Figure 8 This is a structural front view of the lifting base of the photovoltaic junction box provided according to an embodiment of the present utility model; Figure 9 This is a bottom view of the structure of the lifting base of the photovoltaic junction box according to an embodiment of the present utility model; Figure 10 This is a first structural schematic diagram of a photovoltaic junction box installed on a photovoltaic module according to an embodiment of the present utility model; Figure 11 This is a second structural schematic diagram of a photovoltaic junction box installed on a photovoltaic module according to an embodiment of the present utility model.

[0031] It is worth noting that the front side of the photovoltaic junction box involved in this utility model embodiment generally refers to the side away from the photovoltaic module after the photovoltaic junction box is installed; the back side of the photovoltaic junction box generally refers to the side close to the photovoltaic module after the photovoltaic junction box is installed.

[0032] In this embodiment of the invention, the front side of the photovoltaic module generally refers to the side facing the sunlight during use; the back side of the photovoltaic module generally refers to the side facing away from the sunlight during use. The photovoltaic junction box is generally installed and fixed to the back side of the photovoltaic module.

[0033] The height direction of the box 10 involved in this utility model embodiment generally refers to the distance from the front of the photovoltaic junction box to the back of the photovoltaic junction box or from the back of the photovoltaic junction box to the front of the photovoltaic junction box.

[0034] Specifically, such as Figures 3 to 11 As shown, the photovoltaic junction box provided in this embodiment of the present invention may include: a box body 10, a diode module, and a lifting base 40. Further, the diode module is installed inside the box body; the lifting base 40 is located on the back of the box body 10 and is movably connected to the box body 10; the lifting base 40 includes a second through hole 41, which is used to introduce the busbar lead 81 of the photovoltaic module into the box body 10; the lifting base 40 is displaced in the height direction of the box body 10 so that an adjustable accommodating space is formed at the bottom of the box body 10, and the adjustable accommodating space is used to accommodate excess adhesive at the lead-out holes of the photovoltaic module.

[0035] Specifically, regarding box 10, such as Figures 3 to 7 , Figure 10 and Figure 11 As shown, the box 10 may include: a box frame surrounding the sides of the box 10, a box cover 13 disposed on the front of the box 10, and a box back plate 12 disposed on the back of the box 10. The box back plate 12 is provided with a through groove communicating with the cavity 11. The box cover 13 and the box back plate 12 are generally detachable. Specifically, the box cover 13 is typically installed after the photovoltaic junction box is installed into the photovoltaic module 80, the box 10 is filled with potting compound, and then the box cover 13 is snapped onto the front of the box 10. Regarding the box back plate 12, as... Figures 4 to 6 As shown, the back panel 12 is generally fixed to the back of the box body 10. The middle area of ​​the back panel 12 (corresponding to the area of ​​the lead-out hole of the photovoltaic module 80) is generally a through groove running vertically through the box. This allows the busbar lead-out wire 81 of the photovoltaic module 80 to pass through the through groove and enter the busbar guide groove 43 of the lifting base 40. Guided by the busbar guide groove 43, the busbar lead-out wire 81 passes through the second through hole 41 and connects to the diode module.

[0036] Among them, such as Figure 3 , Figure 6 and Figure 10 As shown, the diode module may include: a diode 20 and an electrode plate 30 electrically connected to the diode 20, and the busbar lead 81 of the photovoltaic module is electrically connected to the electrode plate 30. More specifically, as Figure 3 and Figure 6 As shown, the electrode plate 30 may include a first through hole 31 for the busbar lead 81 to pass through. For ease of operation, the first through hole 31 can be correspondingly arranged with a second through hole 41. The busbar lead 81 passes through the second through hole 41 and the first through hole 31 in sequence, so that the busbar lead 81 passing through the first through hole 31 is soldered to the electrode plate 30, thereby fixing the busbar lead 81 to the electrode plate 30 and forming a stable electrical connection between the busbar lead 81 and the electrode plate 30.

[0037] The connection relationship between the diode 20 included in the diode module and the electrode plate 30 electrically connected to the diode 20 is generally as follows: (e.g.) Figure 3 , Figure 6 and Figure 10 As shown, the positive and negative terminals of diode 20 are respectively connected to an electrode plate 30. That is, a photovoltaic junction box generally contains two electrode plates 30. Each electrode plate 30 is provided with a first through hole 31, wherein the first through hole 31 corresponds to the second through hole 41 included in the lifting base 40. Then, the busbar lead 81 of the photovoltaic module 80 first passes through the second through hole 41 and then passes through the first through hole 31, forming as shown in the figure. Figure 10 The structure shown is in Figure 10 Based on the structure shown, the busbar lead 81 is bent towards the electrode plate 30, and then welded to the electrode plate 30 to achieve electrical connection between the busbar lead 81 and the electrode plate 30. Then, the cavity inside the housing 10 is filled with potting compound to prevent moisture from entering the housing 10. After filling the housing 10 with potting compound, the cover plate 13 is fitted onto the front of the housing 10 using a snap-fit ​​method, resulting in the structure shown. Figure 11 The structure shown is designed to further enhance the sealing effect.

[0038] It should be noted that the excess adhesive at the lead-out holes of the photovoltaic modules involved in this utility model generally refers to the adhesive layer that overflows from the lead-out holes during the lamination process of the photovoltaic modules. This excess adhesive may include one or more of EVA, POE, and butyl rubber. Among them, EVA and POE are generally derived from the encapsulating film of photovoltaic modules, while butyl rubber is generally used for photovoltaic modules with a water-blocking layer, such as HJT modules.

[0039] The photovoltaic junction box provided in this embodiment of the utility model uses a lifting base to move in the height direction of the box, so that an adjustable accommodating space is formed at the bottom of the box. The size of the adjustable accommodating space can be adjusted according to the amount of glue overflow at the lead-out hole of the photovoltaic module. That is, the photovoltaic junction box can meet different amounts of glue overflow through the lifting base and accommodate the glue overflow through the adjustable accommodating space, avoiding the glue overflow from affecting the photovoltaic junction box. This allows the back of the box to be stably and reliably installed on the back of the photovoltaic module, improving the stability and reliability of the photovoltaic junction box installation, and improving the reliability of the sealing of the lead-out hole of the photovoltaic module.

[0040] As can be seen from the above, the core of the photovoltaic junction box provided in this embodiment of the present invention lies in the movable connection between the lifting base 40 and the box body 10, the lifting base 40, and the structure that realizes the movable connection. The movable connection between the lifting base 40 and the box body 10, the structure of the lifting base 40, and the structure that realizes the movable connection will be described below.

[0041] Furthermore, the lifting base of the photovoltaic junction box provided in this embodiment can guide the busbar lead wire of the photovoltaic module to contact the diode module. Therefore, the photovoltaic junction box provided in this embodiment can meet the requirements of different thicknesses of excess glue without affecting the contact between the busbar lead wire and the diode module.

[0042] Specifically, there are two possible structures for the movable connection between the lifting base 40 and the box 10.

[0043] The first structure in which the lifting base 40 is movably connected to the side wall of the box body 10 is such that the lifting base 40 is movably connected to the side wall of the box body 10 and moves along the side wall of the box body 10 in the height direction of the box body 10 (the height direction of the box body 10 generally refers to from the back of the box body 10 to the front of the box body 10 or from the front of the box body 10 to the back of the box body 10). For this structure where the lifting base 40 is movably connected to the side wall of the box body 10, the box body 10 may or may not have a back plate 12. For this structure where the lifting base 40 is movably connected to the side wall of the box body 10 and the box body 10 has a back plate 12, the back plate 12 still has a central through groove area that exposes the busbar guide groove 43 and the second through hole 41.

[0044] The second type of structure that allows for the movable connection between the lifting base 40 and the housing 10 is, for example... Figures 4 to 6 As shown, the housing 10 may include: a cavity 11 with an open bottom, located below the diode module; and a lifting base 40 embedded in the cavity 11 and displaced within the cavity 11 in the height direction of the housing 10. More specifically, as Figures 4 to 6As shown, the cavity 11 may include: two fixed baffles 51 arranged opposite to each other, the fixed baffles 51 being fixed inside the box body 10, each fixed baffle 51 being provided with at least one limiting guide groove 52 extending along the height direction of the box body 10; the lifting base 40 is also provided with lifting legs 44 corresponding to the limiting guide grooves 52 on opposite sides; the lifting legs 44 cooperate with the limiting guide grooves 52 to guide the lifting base 40 to move in the height direction of the box body 10 and limit the range of movement. It can be understood that the length of the limiting guide groove 52 in the height direction of the box body 10 is the range of movement of the lifting base 40 in the height direction of the box body 10. The length of the limiting guide groove 52 in the height direction of the box body 10 can be determined according to actual conditions, and the specific value of the length of the limiting guide groove 52 in the height direction of the box body 10 is not limited here. More specifically, in order to facilitate adjustment and reduce the size of the lifting base 40, thereby reducing the amount of material used in the lifting base 40, such as... Figures 4 to 7 As shown, cavity 11 is located below diode 20 and electrode plate 30. The fixed baffle 51 and limiting guide groove 52 guide and limit the lifting base 40, preventing it from affecting the diode module (such as diode 20 and electrode plate 30). This also ensures that the second through hole 41 of the lifting base 40 always corresponds to the first through hole 31 of the electrode plate 30 included in the diode module. This allows the lifting base 40 to be moved to any position, and the busbar lead wire 81 can be guided sequentially through the second through hole 41 and the first through hole 31 via the busbar guide groove 43.

[0045] The second structure, which allows the lifting base 40 to move in the height direction of the box body 10 through the limiting guide groove 52 set on the fixed baffle 51, allows the back plate 12 of the box body 10 to be retained on the back side, so that the photovoltaic junction box can be fixed to the back of the photovoltaic module 80 through the back plate 12, and ensures the reliability and stability of fixing the photovoltaic junction box.

[0046] It is worth noting that, Figures 5 to 7 The number of limiting guide grooves 52 shown (two limiting guide grooves 52 are provided at intervals on each fixed baffle 51) is only an example. More limiting guide grooves 52 can be provided on the fixed baffle 51. Correspondingly, the number and position of the lifting legs 44 on the lifting base 40 generally correspond to the limiting guide grooves 52.

[0047] By cooperating with the lifting support 44 and the limiting guide groove 52, the lifting base 40 can be stably moved in the height direction of the box 10, avoiding the lifting base 40 from shifting and also avoiding the lifting base 40 from affecting the diode 20 and the electrode plate 30.

[0048] Furthermore, based on the second structure that allows for a movable connection between the lifting base 40 and the housing 10, such as... Figures 5 to 7 As shown, the cavity 11 may also include two opposing side limiting plates 53, which are fixed inside the housing 10. The opposing sides of the lifting base 40 without lifting legs 44 abut against the two side limiting plates 53. By having the opposing sides of the lifting base 40 without lifting legs 44 abut against the two side limiting plates 53, the lifting base 40 can be further stabilized, preventing displacement of the lifting base 40 during the lifting process.

[0049] More specifically, the lifting base 40, without the lifting legs 44, has protrusions on opposite sides, and the two side limiting plates 53 each have grooves that mate with the protrusions; or, the lifting base 40, without the lifting legs 44, has grooves on opposite sides, and the two side limiting plates 53 each have protrusions that mate with the grooves. The mating of the grooves and protrusions further enhances the reliability of stabilizing the lifting base 40. More specifically, the two fixed baffles 51 are arranged opposite each other along the length of the box body 10, and the two side limiting plates 53 are arranged opposite each other along the width of the box body 10.

[0050] Further, as shown in the figure Figure 7 As shown, the two side limiting plates 53 are fixed to the inner side wall of the box body 10 and abut against the back plate 12 of the box to better stabilize the side limiting plates 53.

[0051] Regarding the structure of the lifting base 40, whether it's the first structure or the second structure regarding the movable connection between the lifting base 40 and the housing 10, such as... Figure 4 , Figure 5 , Figure 8 as well as Figure 9 As shown, in addition to the second through hole 41 mentioned above, the lifting base 40 may also include: an intermediate baffle plate 42 and busbar guide grooves 43 of a “˄” shape structure disposed on the two long sides of the intermediate baffle plate 42; the second through hole 41 is disposed on the top of the “˄” shape structure. The intermediate baffle plate 42 separates the top of the “˄” shape structure to ensure that the busbar guide grooves 43 can accurately guide the busbar lead wire 81, facilitating the assembly of the busbar lead wire 81.

[0052] More specifically, such as Figure 4 , Figure 5 , Figure 8 as well as Figure 9 As shown, the "˄"-shaped manifold guide groove 43 generally includes two guide plates 431 forming a "˄"-shaped cross-section. The two guide plates 431 enclose a second through hole 41, which is located at the top of the "˄".

[0053] On the one hand, the intermediate baffle plate 42 is fixedly connected to the two adjacent guide plates 431 of the two busbar guide grooves 43, making the lifting base 40 an integral structure, which facilitates the assembly of the lifting base 40; on the other hand, the intermediate baffle plate 42 abuts against the overflow adhesive 70, and the intermediate baffle plate 42 simultaneously drives the guide plates 431 of the two busbar guide grooves 43 to move, so that the lifting base 40 moves as a whole, providing sufficient space to accommodate the overflow adhesive 70.

[0054] Understandably, the lifting base 40 corresponds to the lead-out area of ​​the photovoltaic module 80. Therefore, after the lifting base 40 comes into contact with the overflow adhesive 70, the overflow adhesive 70 can push the lifting base 40 towards the front of the box 10, causing the lifting base 40 to shift towards the front of the box 10 to provide sufficient space for the overflow adhesive 70. This allows the back panel 12 of the box 10 to be securely attached to the back of the photovoltaic module, ensuring reliable stability. Specifically, taking the second structure with a movable connection between the lifting base 40 and the box 10 as an example, such as... Figure 4 As shown, before the lifting base 40 contacts the overflow adhesive 70, the lifting base 40 is located on the back of the box body 10. After the lifting base 40 contacts the overflow adhesive 70, the lifting base 40 moves towards the front of the box body 10, resulting in the structure shown below. Figure 5 As shown, sufficient space is left between the lifting base 40 and the back of the photovoltaic module 80 to accommodate the overflow adhesive 70, thereby enabling the entire back panel 12 of the box body 10 to form a reliable and stable fixed connection with the back of the photovoltaic module 80. Furthermore, since the overflow adhesive 70 abuts against the lifting base 40, a space is created between the lifting base 40 and the side of the back panel 12 to accommodate the overflow adhesive 70. After the photovoltaic junction box is fixed to the back of the photovoltaic module 80, the distance from each position of the back panel 12 of the box body 10 to the back of the photovoltaic module 80 is equal. Therefore, regardless of whether the amount of overflow adhesive 70 increases or decreases, the same amount of adhesive can be used to stably and reliably bond the photovoltaic junction box to the back of the photovoltaic module 80. This ensures the stability of the adhesive coating process while avoiding adhesive waste. Furthermore, the fixing forces acting on the back panel 12 of the box body 10 at various positions are balanced. The balanced fixing forces can reduce the risk of a water vapor interface forming between the back panel 12 of the box body 10 and the back of the photovoltaic module 80, which is beneficial to improving the reliability of the seal between the back panel 12 of the box body 10 and the back of the photovoltaic module 80.

[0055] Regarding the relative relationship between the fixed baffles 51 and the side limiting plates 53 and the intermediate blocking plate 42: the two fixed baffles 51 correspond to the two long sides of the intermediate blocking plate 42, and the two side limiting plates 53 abut against the two short sides of the intermediate blocking plate 42. The abutment of the two side limiting plates 53 against the two short sides of the intermediate blocking plate 42 further improves the reliability of the limiting of the lifting base 40 and prevents the lifting base 40 from shifting during movement. More specifically, the two fixed baffles 51 are arranged opposite each other in the length direction of the box 10, and the two side limiting plates 53 are arranged opposite each other in the width direction of the box 10 to facilitate the production and assembly of the photovoltaic junction box.

[0056] More specifically, the two short sides of the intermediate baffle plate 42 are provided with limiting members 45, and the two side limiting plates 53 are provided with limiting structures that cooperate with the limiting members 45. For example, as shown... Figure 8 and Figure 9 As shown, the limiting member 45 is a protrusion, and the two side limiting plates 53 are provided with grooves that mate with the limiting member 45. Alternatively, the limiting member 45 can be a groove, and the two side limiting plates 53 can be provided with protrusions that mate with the limiting member 45, etc. This is to further improve the reliability of guiding and limiting the lifting base 40 through the limiting member 45.

[0057] In addition, such as Figure 8 and Figure 9 As shown, a limiting protrusion 46 can also be provided on the short side of the guide plate 431.

[0058] For the structure of setting a limiting protrusion 46 on the short side of the guide plate 431, such as Figure 7 As shown, the side limiting plate 53 that cooperates with the limiting protrusion 46 is generally an inverted "T" shaped structure. The transverse section of the inverted "T" shaped structure is a first baffle 531 extending along the length direction of the inner sidewall of the box 10, and the longitudinal section is a second baffle 532 extending along the height direction of the inner sidewall of the box 10.

[0059] More specifically, such as Figure 7As shown, the fixed baffle 51 abuts against the first stop bar 531 of the two oppositely arranged side limiting plates 53 to reinforce the fixed baffle 51 and make it more stable. Additionally, the limiting protrusion 46 is located above the first stop bar 531. When the lifting base 40 is at its lowest position, it allows the first stop bar 531 to abut against the limiting protrusion 46 to support the lifting base 40, share its weight, and prevent the lifting base 40 from crushing the fixed baffle 51. Understandably, as the lifting base 40 moves upward (i.e., towards the front of the box 10), the limiting protrusion 46 no longer contacts the first stop bar 531. During the downward movement of the lifting base 40, after the limiting protrusion 46 moves above the first stop bar 531 and abuts against it, the lifting base 40 cannot continue to move downward. Therefore, the cooperation between the first stop bar 531 and the limiting protrusion 46 also prevents the lifting base 40 from falling out of the box 10.

[0060] Furthermore, if the aforementioned limiting member 45 is a protrusion, the second stop bar 532 is provided with a groove that mates with the protrusion of the limiting member 45; if the aforementioned limiting member 45 is a groove, the second stop bar 532 is provided with a protrusion that mates with the groove of the limiting member 45.

[0061] In addition, the side limiting plate 53, which includes the first stop bar 531 and the second stop bar 532, has an inverted "T" shaped structure and is fixed to the inner side wall of the box. This ensures the stability and reliability of the side limiting plate 53, while also ensuring the stability and reliability of the two fixed stops 51, reducing the risk of the fixed stops 51 collapsing. More preferably, the first stop bar 531 is an integral structure with the box back plate 12 to further improve the stability and reliability of the side limiting plate 53.

[0062] Furthermore, such as Figure 7 As shown, the photovoltaic junction box may also include a fixing post 54 disposed inside the box body 10. One end of the fixing post 54 is mounted on the box back plate 12, and the diode module is mounted on the other end of the fixing post 54. More specifically, the electrode plates 30 are all fixed to the other end of the fixing post 54, and the positive and negative terminals of the diode 20 are respectively connected to the electrode plates 30 disposed on both sides of the diode. Regarding the aforementioned fixing baffle 51, the fixing post 54 fixed on the box back plate 12 can also support the fixing baffle 51 to further ensure the stability of the fixing baffle 51. In addition, the end of the fixing post 54 away from the box back plate 12 can be used to fix and support the diode module, thereby forming an integrated structure of the diode module, fixing post 54, fixing baffle 51, and box back plate 12, ensuring that the diode module and fixing baffle 51 can be stably placed inside the box body 10.

[0063] In addition, the photovoltaic junction box provided in this utility model embodiment has a simple structure and is easy to implement, making it suitable for technology promotion. It is especially suitable for photovoltaic modules that require the addition of waterproof adhesive (such as butyl rubber) at the outlet and have serious adhesive overflow problems, such as HJT double-glass modules.

[0064] In addition, this utility model also provides a photovoltaic module. For example... Figure 10 and Figure 11 As shown, the photovoltaic module 80 may include the photovoltaic junction box provided in any of the above embodiments.

[0065] Since the lifting base 40 of the photovoltaic junction box can move in the height direction of the box body 10, no matter how the amount of overflow adhesive 70 changes, a space can be formed on the back of the box body 10 to accommodate the overflow adhesive 70. This can solve the problems of poor installation and poor sealing of the photovoltaic junction box caused by excessive overflow adhesive 70 and excessively high overflow adhesive 70.

[0066] The following example illustrates the application of the photovoltaic junction box provided in this embodiment of the invention on the photovoltaic module 80, using the structure in which water-blocking adhesive is added to the lead-out holes on the back of the HJT double-glass module, thereby increasing the amount of adhesive overflowing from the lead-out holes.

[0067] Specifically, firstly, Figure 8 or Figure 9 The lifting base 40 shown is assembled into the box body 10 to obtain the following result: Figure 4 The relative positional relationship between the lifting base 40 and the housing 10 is shown (in addition, the lifting base 40 and the housing 10 can be provided as a whole to the photovoltaic module production line without the need for the lifting base 40 to be assembled into the housing 10); the housing 10 with the lifting base 40 installed is placed in the lead-out hole area on the back of the photovoltaic module 80 (the lead-out hole area has been coated with water-blocking adhesive). Guided by the busbar guide groove 43 of the lifting base 40, the busbar lead-out wire 81 leading out of the lead-out hole on the back of the photovoltaic module 80 passes sequentially through the second through hole 41 and the first through hole 31. The overflow adhesive 70 in the lead-out hole area abuts against the middle baffle plate 42 of the lifting base 40. During the process of applying pressure to the housing 10 towards the back of the photovoltaic module 80, the overflow adhesive 70 applies a force to the middle baffle plate 42 towards the front of the photovoltaic module 80, causing the lifting base 40 to shift towards the front of the housing 10 (exemplarily, as shown in the figure). Figure 5 The relative positional relationship between the lifting base 40 and the box body 10 shown forms a space to accommodate the overflow adhesive 70. Therefore, the box body 10 will not be lifted by the overflow adhesive 70, ensuring that the distance from each position of the back panel 12 of the box body 10 to the back of the photovoltaic module 80 is equal, resulting in... Figure 10The structure shown involves bending the busbar lead 81 onto the electrode plate 30 and welding the busbar lead 81 to the electrode plate 30. Finally, potting compound is poured into the box 10 from the front, sealing the interior of the photovoltaic junction box and providing heat conduction. Finally, the box cover 13 is snapped onto the front of the box 10, resulting in the structure shown. Figure 11 The structure shown.

[0068] 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, characterized in that, include: The box body (10), the diode module, and the lifting base (40) are included. The diode module is installed inside the housing (10); The lifting base (40) is located on the back of the box (10) and is movably connected to the box (10); The lifting base (40) includes a second through hole (41), which is used to introduce the busbar lead wire (81) of the photovoltaic module into the box (10); The lifting base (40) is moved in the height direction of the box (10) so that an adjustable accommodating space is formed at the bottom of the box (10), and the adjustable accommodating space is used to accommodate the excess glue at the lead-out hole of the photovoltaic module.

2. The photovoltaic junction box according to claim 1, characterized in that, The box body (10) includes: a cavity (11) with an open bottom. The cavity (11) is located below the diode module; The lifting base (40) is embedded in the cavity (11) and moves within the cavity (11) in the height direction of the box (10).

3. The photovoltaic junction box according to claim 2, characterized in that, The cavity (11) includes two fixed baffles (51) arranged opposite to each other. The fixed baffles (51) are fixed inside the box body (10). Each fixed baffle (51) is provided with at least one limiting guide groove (52) extending along the height direction of the box body (10). The lifting base (40) is also provided with lifting feet (44) on both sides corresponding to the limiting guide groove (52). The lifting support (44) cooperates with the limiting guide groove (52) to guide the lifting base (40) to move in the height direction of the box (10) and limit the range of movement.

4. The photovoltaic junction box according to claim 3, characterized in that, The cavity (11) also includes two side limiting plates (53) arranged opposite to each other, and the side limiting plates (53) are fixed inside the box body (10); The lifting base (40) is not provided with the lifting support (44) and its opposite sides abut against the two side limiting plates (53).

5. The photovoltaic junction box according to claim 4, characterized in that, The lifting base (40) is not provided with the lifting support (44) and there are protrusions on the opposite sides. The two side limiting plates (53) are respectively provided with grooves that cooperate with the protrusions. Alternatively, the lifting base (40) may not be provided with the lifting support (44) and the opposite sides may be provided with grooves, and the two side limiting plates (53) may be provided with protrusions that cooperate with the grooves.

6. The photovoltaic junction box according to claim 4, characterized in that, The two fixed baffles (51) are arranged opposite each other in the length direction of the box body (10), and the two side limiting plates (53) are arranged opposite each other in the width direction of the box body (10).

7. The photovoltaic junction box according to any one of claims 1 to 6, characterized in that, The lifting base (40) also includes: a middle baffle plate (42) and a "˄"-shaped busbar guide groove (43) disposed on the two long sides of the middle baffle plate (42); The second through hole (41) is provided at the top of the "˄"-shaped structure.

8. The photovoltaic junction box according to claim 2, characterized in that, The box body (10) includes: a box frame that surrounds the side of the box body (10), a box cover plate (13) disposed on the front of the box body (10), and a box back plate (12) disposed on the back of the box body (10). The back panel (12) of the box is provided with a through groove that communicates with the cavity (11).

9. The photovoltaic junction box according to claim 8, characterized in that, It also includes a fixing post (54) disposed inside the box body (10), one end of the fixing post (54) is mounted on the back plate (12) of the box, and the diode module is mounted on the other end of the fixing post (54).

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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