Quick-mounting photovoltaic junction box

Abstract

The application belongs to the technical field of photovoltaic devices, and particularly relates to a quick-mounting photovoltaic junction box. The junction box comprises a base, a box body arranged on the upper side of the base, a box cover detachably mounted on the box body, a first pole piece, a second pole piece, a diode and a base fixedly connected in the box body, the first pole piece and the second pole piece are both electrically connected with the diode, the base is fixedly connected with a first conductive piece and a second conductive piece, the second conductive piece is electrically connected with a third conductive piece, the third conductive piece is electrically connected with a cable, the cable is electrically connected with a plug, and the box body is fixedly connected with mirror image distributed limit pieces. The base is fixed on the back light side of a photovoltaic panel, and then the limit pieces mirror image distributed on the box body are used to clamp the base, so that the box body is quickly fixed, and then when the box body is replaced, it is not necessary to shovel glue and re-adhere as the existing junction box generally needs, thereby saving the installation and dismounting time.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic equipment technology, and in particular to a quick-install photovoltaic junction box. Background Technology

[0002] The photovoltaic junction box is a core electrical component that is pasted on the back of the photovoltaic panel. It is commonly known as the "little black box" of the photovoltaic panel. Although it accounts for less than 2% of the total cost of the module, it is a component with a high incidence of DC side failures in the power station and directly determines the outdoor lifespan and safety of the module. During the installation of existing junction boxes, most of them are sealed with glue. The box is filled with cured silicone, which makes it difficult for moisture to penetrate and is also corrosion resistant.

[0003] During installation, existing junction boxes not only require sealing the inside with potting compound, but also need to be glued to the back of the photovoltaic panel. Therefore, when disassembling them, it is necessary to not only remove the potting compound inside the junction box and separate the photovoltaic panel electrode from the junction box electrode, but also to remove the junction box from the back of the photovoltaic panel. After that, the installation of a new junction box requires the same gluing and potting process again, which is extremely time-consuming. Summary of the Invention

[0004] To overcome the shortcomings mentioned in the background art, the present invention provides a quick-install photovoltaic junction box.

[0005] The technical solution of the present invention is as follows: a quick-install photovoltaic junction box, including a base, a box body provided on the upper side of the base, a box cover detachably installed on the box body, a first electrode, a second electrode, a diode and a base fixedly connected inside the box body, the first electrode and the second electrode being electrically connected to the diode, a first conductive element and a second conductive element fixedly connected to the base, the first electrode being electrically connected to the second conductive element, the second electrode being electrically connected to the first conductive element, a third conductive element being electrically connected to the second conductive element, a cable being electrically connected to the third conductive element, a plug being electrically connected to the cable, and mirror-distributed limiting elements fixedly connected to the box body, the limiting elements mutually limiting the base.

[0006] As a preferred embodiment of the present invention, the box body is fixedly connected with several sets of mounting components arranged in a mirror image. Each set of mounting components has a plurality of components. The mounting components in the same set are slidably connected to a rotating disk. The rotating disk is slidably connected to an operating component. The operating component is used to press the adjacent limiting component.

[0007] As a preferred embodiment of the present invention, each of the mounting components in the same group is provided with an elastic strip between itself and the adjacent rotating disk.

[0008] As a preferred embodiment of the present invention, the box body is fixedly connected with several sets of mirror-distributed limiting blocks, each set of limiting blocks having a plurality of blocks, and the limiting blocks in the same set are used to limit the adjacent rotating disks.

[0009] As a preferred embodiment of the present invention, the box body is slidably connected with mirror-distributed sliding seats, and springs are provided between the mirror-distributed sliding seats. The base is fixedly connected with mirror-distributed pressing members, which are used to press adjacent sliding seats.

[0010] As a preferred embodiment of the present invention, the opposing sides of the first conductive element, the second conductive element, and the mirror-distributed sliding seat are all wavy.

[0011] As a preferred embodiment of the present invention, two sets of mirror-distributed fins are fixedly attached to the outer side of the box body, and the fins are used to dissipate heat from the box body.

[0012] As a preferred embodiment of the present invention, the cover is fixedly connected to a first heat-conducting element and a second heat-conducting element. The first heat-conducting element and the second heat-conducting element are respectively in contact with the diode and the base. Both the first heat-conducting element and the second heat-conducting element are fixedly connected to a bimetallic strip. The bimetallic strip is fixedly connected to a third heat-conducting element. The third heat-conducting element is in contact with another bimetallic strip. The fins in the same group are jointly fixedly connected to a fourth heat-conducting element with a mirror distribution. The mirror-distributed fourth heat-conducting elements are all in contact with the adjacent third heat-conducting elements.

[0013] As a preferred embodiment of the present invention, the bimetallic strip is composed of two metals with different coefficients of thermal expansion, and is used to bend the bimetallic strip when heated.

[0014] As a preferred embodiment of the present invention, the metal with a larger coefficient of thermal expansion in the bimetallic strip is located below the metal with a smaller coefficient of thermal expansion.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention fixes the base to the backlight side of the photovoltaic panel and then uses the limiting parts distributed in a mirror on the box to hold the base in place, thereby quickly fixing the box. When replacing the box, there is no need to remove the glue and re-glu it as with existing junction boxes, saving installation and disassembly time.

[0016] By using a rotating disc to shield the limiting component, the limiting component is protected, preventing accidental activation and ensuring a stable connection between the base and the box.

[0017] The photovoltaic panel electrode is pressed onto the first and second conductive components by a mirror-distributed sliding seat, thereby achieving a quick connection between the first and second conductive components and the photovoltaic panel electrode. This eliminates the need for welding as required by existing junction boxes, greatly reducing the installation and disassembly time of junction boxes.

[0018] Heat is directly conducted to the fins through the first, second, bimetallic strip, third, and fourth heat-conducting elements, improving the heat dissipation performance of the device. When a heat source is abnormally hot, all the fins are used to dissipate heat from that heat source, thereby slowing down the temperature rise of that heat source. This gives the staff more time to arrive for maintenance and reduces the probability of the junction box catching fire due to overheating before maintenance. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a three-dimensional structural diagram of the first and second electrodes of the present invention; Figure 4 This is a three-dimensional structural diagram of the first and second conductive elements of the present invention; Figure 5 This is a three-dimensional structural diagram of the rotating disk and operating components of the present invention; Figure 6 This is an exploded view of the rotating disk and elastic strip of the present invention.

[0020] The components are: 1. Base, 2. Box body, 3. Box cover, 4. First electrode, 5. Second electrode, 6. Diode, 7. Base, 8. First conductive element, 9. Second conductive element, 10. Third conductive element, 11. Cable, 12. Plug, 13. Limiting element, 14. Mounting element, 15. Rotating disk, 16. Operating element, 17. Elastic strip, 18. Limiting block, 19. Sliding seat, 20. Spring, 21. Extrusion element, 22. Fin, 23. First heat-conducting element, 24. Second heat-conducting element, 25. Bimetallic strip, 26. Third heat-conducting element, 27. Fourth heat-conducting element. Detailed Implementation

[0021] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. Location descriptions selected in the specification, such as "above," "below," etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0022] Example 1

[0023] A quick-install photovoltaic junction box, such as Figures 1-6As shown, the device includes a base 1, with a housing 2 mounted on the upper side of the base 1. The base 1 and housing 2 are sealed together. A cover 3 is detachably mounted on the upper side of the housing 2. A first electrode 4, a second electrode 5, a diode 6, and a base 7 are fixedly connected inside the housing 2. The housing 2 is divided into left and right parts. The diode 6 is located on the left side of the housing 2. During use, only the left side of the housing 2 is potted. The first electrode 4 and the second electrode 5 are both electrically connected to the diode 6. The base 7 is made of a non-conductive material with good thermal conductivity. A first conductive element 8 and a second conductive element 9 are fixedly connected to the left and right sides of the base 7, respectively. The first electrode 4 and the second electrode 5 are connected to the diode 6. Two conductive components 9 are electrically connected. The second electrode 5 is electrically connected to the first conductive component 8. The second conductive component 9 is electrically connected to the third conductive component 10. The third conductive component 10 is electrically connected to the cable 11. The cable 11 is electrically connected to the plug 12. The box body 2 is fixedly connected to two limiting components 13 distributed in a front-to-back mirror image. The limiting components 13 limit each other with the base 1. The limiting components 13 are J-shaped and elastic. When the box body 2 moves downward, the limiting components 13 are deformed by the pressure of the base 1. When the box body 2 contacts the base 1, the limiting components 13 return to their original shape under their own elasticity and lock the base 1, thereby quickly fixing the box body 2.

[0024] like Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the box body 2 is fixedly connected to two sets of mounting members 14 arranged in a mirror image. Each set of mounting members 14 has two members. The two mounting members 14 in the same set are slidably connected to a rotating disk 15. The rotating disk 15 is used to shield the limiting member 13, thereby protecting the limiting member 13 from accidental contact. An operating member 16 is slidably connected to the eccentric part of the rotating disk 15. The operating member 16 is used to press the adjacent limiting member 13. When the rotating disk 15 is adjusted until the operating member 16 is aligned with the adjacent limiting member 13, the limiting member 13 is unlocked by the operation member 16. An elastic strip 17 is provided between each of the two mounting members 14 in the same set and the adjacent rotating disk 15. The elastic strip 17 becomes longer when stretched and returns to its original shape under its own elasticity after the tension is removed. The housing 2 is fixedly connected to two sets of limiting blocks 18 arranged in a mirror image. Each set of limiting blocks 18 has two blocks. The two limiting blocks 18 in the same set are used to limit the rotation angle of adjacent rotating disks 15, thereby facilitating the user's control over the rotation angle of the rotating disks 15 and making operation more convenient. Inside the housing 2, two sliding seats 19 are slidably connected in a mirror image. Two springs 20 are set between the two sliding seats 19. In the figure, the springs 20 are in a compressed state. Two pressing members 21 are fixedly connected to the upper side of the base 1 in a mirror image. The pressing members 21 are used to press adjacent sliding seats 19. The opposite sides of the two sliding seats 19 are provided with inclined surfaces to fit the pressing members 21. The opposing sides of the first conductive member 8, the second conductive member 9, and the mirror-distributed sliding seats 19 are all wavy, thereby increasing the contact area between the photovoltaic panel electrode and the first conductive member 8 and the second conductive member 9.

[0025] When using this device, first fix the base 1 to the backside of the photovoltaic panel. During the fixing process, allow the photovoltaic panel electrode to pass between the two pressing members 21. Then align the box 2 and the base 1, and move the box 2. The box 2 drives the two limiting members 13 to move. The two limiting members 13 are deformed by the pressure of the base 1. After the box 2 and the base 1 come into contact, the limiting members 13 return to their original shape under their own elasticity and lock the base 1. During this process, the photovoltaic panel electrode passes into the box 2 from the bottom, and the two electrodes of the photovoltaic panel are respectively aligned with the two gaps between the two sliding seats 19 and the base 7. When the box 2 moves, the pressing members 21 contact and press the sliding seats 19. The two sliding seats 19 move towards each other and compress the two springs 20. After the limiting members 13 lock the base 1, the two sliding seats 19 push the photovoltaic panel electrode into the base 1. The two electrodes of the plate are fixed to the first conductive element 8 and the second conductive element 9 respectively, thereby realizing the quick installation of the box body 2. When the box body 2 needs to be replaced, the rotating disk 15 is rotated, which drives the operating element 16 to rotate. At the same time, the elastic strip 17 is stretched to store force. After the operating element 16 is aligned with the adjacent limiting element 13, the operating element 16 is pressed, which causes the operating element 16 to squeeze the limiting element 13, thereby releasing the locking of the limiting element 13 to the base 1, and thus realizing the quick disassembly of the box body 2. Afterwards, the two limiting elements 13 drive the two operating elements 16 to move in opposite directions. Then, the rotating disk 15 rotates back to its original position under the action of the adjacent elastic strip 17. During the separation of the box body 2 from the base 1, the two sliding seats 19 gradually move away from the pressing element 21. The two sliding seats 19 move in opposite directions under the action of the two springs 20, thereby releasing the fixation of the photovoltaic plate electrodes.

[0026] Example 2

[0027] Based on Example 1, such as Figures 1-4As shown, two sets of fins 22, mirror-distributed to the left and right, are fixed to the outer side of the housing 2. The fins 22 are used to dissipate heat from the housing 2, improving the heat dissipation capacity of the device. A first heat-conducting element 23 and a second heat-conducting element 24 are fixed to the cover 3. The first heat-conducting element 23 and the second heat-conducting element 24 pass through the cover 3. The lower sides of the first heat-conducting element 23 and the second heat-conducting element 24 contact the diode 6 and the base 7 respectively, thereby dissipating the heat from the diode 6 and the base 7 for direct heat dissipation. A bimetallic strip 25 is fixed to the upper side of both the first heat-conducting element 23 and the upper side of the second heat-conducting element 24. The bimetallic strip 25 is located on the upper side of the cover 3. A third heat-conducting element 26 is fixed to the bimetallic strip 25. One end of the bimetallic strip 25 is fixed to either the first heat-conducting element 23 or the second heat-conducting element 24, and the other end of the bimetallic strip 25 is fixed to the third heat-conducting element 26. The third heat-conducting element 26 is fixedly connected to another bimetallic strip 25. The bimetallic strip 25 fixedly connected to the first heat-conducting element 23 is located on the rear side, and the bimetallic strip 25 fixedly connected to the second heat-conducting element 24 is located on the front side. The front bimetallic strip 25 is fixedly connected to the third heat-conducting element 26 on the left side, and the rear bimetallic strip 25 is fixedly connected to the third heat-conducting element 26 on the right side. The fins 22 in the same group are jointly fixedly connected to two fourth heat-conducting elements 27 distributed in a mirror image. The mirror-distributed fourth heat-conducting elements 27 are all in contact with the adjacent third heat-conducting elements 26, thereby directly conducting the heat from the diode 6 and the base 7 to the fins 22 for heat dissipation, utilizing the good thermal conductivity of metal to improve heat dissipation capacity. The bimetallic strip 25 is composed of two metals with different coefficients of thermal expansion, used to make the bimetallic strip 25 bend when heated. After the bimetallic strip 25 bends and moves the corresponding third heat-conducting element 26, the third heat-conducting element 26 always remains in contact with the corresponding two fourth heat-conducting elements 27 and will not separate. In the bimetallic strip 25, the metal with the larger coefficient of thermal expansion is located below the metal with the smaller coefficient of thermal expansion. This causes the corresponding bimetallic strip 25 to tilt upwards when the diode 6 or base 7 becomes too hot, separating the third heat-conducting element 26 from the other bimetallic strip 25. This redistributes the cooling efficiency of the fins 22, allowing more of its cooling capacity to be supplied to the diode 6 or base 7 with abnormal temperature, thus slowing down their temperature rise. This provides more time for maintenance personnel and reduces the probability of the junction box catching fire due to overheating during the process.

[0028] During the use of this device, the heat generated by diode 6 and the heat generated at the connection between the photovoltaic plate electrode and the first conductive element 8 and the second conductive element 9 are respectively guided to the two bimetallic strips 25 through the first heat-conducting element 23 and the second heat-conducting element 24, then to the four fourth heat-conducting elements 27 through the two third heat-conducting elements 26, and finally dissipated through the fins 22. When abnormal heating occurs due to a fault between diode 6 or the photovoltaic plate electrode and the first conductive element 8 and the second conductive element 9, taking diode 6 as an example, the heating between the photovoltaic plate electrode and the first conductive element 8 and the second conductive element 9 is normal, but the heat generated by diode 6 increases sharply, causing the temperature of the bimetallic strip 25 on the rear side to rise. The two metals in the bimetallic strip 25 have different coefficients of expansion, with the lower side expanding more than the upper side. This causes the bimetallic strip 25 to bend upwards, and the right side of the bimetallic strip 25 tilts up, causing the third heat-conducting element 26 on the right side to move upwards. This separates the third heat-conducting element 26 from the front bimetallic strip 25. At this time, both sets of fins 22 on the left and right sides are used to dissipate heat from the faulty diode 6, while the base 7 with normal temperature dissipates heat only through the set of fins 22 on the left side. This redistributes the heat dissipation efficiency of the fins 22, improves the heat dissipation effect on the diode 6, and thus slows down the temperature rise of the diode 6. This gives the staff more time to arrive for repairs and reduces the probability of the junction box catching fire due to overheating before repairs are carried out.

[0029] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A quick-install photovoltaic junction box, characterized in that: The device includes a base (1), a box (2) on the upper side of the base (1), a cover (3) detachably mounted on the box (2), a first electrode (4), a second electrode (5), a diode (6) and a base (7) fixedly connected inside the box (2), the first electrode (4) and the second electrode (5) being electrically connected to the diode (6), the base (7) being fixedly connected to a first conductive element (8) and a second conductive element (9), the first electrode (4) being electrically connected to the second conductive element (9), the second electrode (5) being electrically connected to the first conductive element (8), the second conductive element (9) being electrically connected to a third conductive element (10), the third conductive element (10) being electrically connected to a cable (11), the cable (11) being electrically connected to a plug (12), and the box (2) being fixedly connected to mirror-distributed limiting elements (13), the limiting elements (13) being mutually limiting with the base (1); Two sets of mirror-distributed fins (22) are fixed to the outside of the box (2), and the fins (22) are used to dissipate heat from the box (2).

2. The quick-install photovoltaic junction box according to claim 1, characterized in that: The box body (2) is fixed with several sets of mounting parts (14) arranged in a mirror image. Each set of mounting parts (14) has several of them. The mounting parts (14) in the same set are slidably connected to a rotating disk (15). The rotating disk (15) is slidably connected to an operating part (16). The operating part (16) is used to press the adjacent limiting part (13).

3. A quick-install photovoltaic junction box according to claim 2, characterized in that: Each of the mounting components (14) in the same group is provided with an elastic strip (17) between itself and the adjacent rotating disk (15).

4. A quick-install photovoltaic junction box according to claim 3, characterized in that: The box (2) is fixed with several sets of mirror-distributed limiting blocks (18), each set of limiting blocks (18) has several of them, and the limiting blocks (18) in the same set are used to limit the adjacent rotating disks (15).

5. A quick-install photovoltaic junction box according to claim 1, characterized in that: The box (2) is slidably connected with mirror-distributed sliding seats (19), and springs (20) are provided between the mirror-distributed sliding seats (19). The base (1) is fixedly connected with mirror-distributed pressing members (21), and the pressing members (21) are used to press the adjacent sliding seats (19).

6. A quick-install photovoltaic junction box according to claim 5, characterized in that: The opposing sides of the first conductive element (8), the second conductive element (9), and the mirror-distributed sliding seat (19) are all wavy.

7. A quick-install photovoltaic junction box according to claim 1, characterized in that: The cover (3) is fixedly connected to a first heat-conducting element (23) and a second heat-conducting element (24). The first heat-conducting element (23) and the second heat-conducting element (24) are in contact with the diode (6) and the base (7) respectively. The first heat-conducting element (23) and the second heat-conducting element (24) are both fixedly connected to a bimetallic strip (25). The bimetallic strip (25) is fixedly connected to a third heat-conducting element (26). The third heat-conducting element (26) is in contact with another bimetallic strip (25). The fins (22) in the same group are jointly fixedly connected to a mirror-distributed fourth heat-conducting element (27). The mirror-distributed fourth heat-conducting elements (27) are all in contact with the adjacent third heat-conducting element (26).

8. A quick-install photovoltaic junction box according to claim 7, characterized in that: The bimetallic strip (25) is composed of two metals with different coefficients of thermal expansion and is used to bend the bimetallic strip (25) when heated.

9. A quick-install photovoltaic junction box according to claim 8, characterized in that: In the bimetallic strip (25), the metal with a larger coefficient of thermal expansion is located below the metal with a smaller coefficient of thermal expansion.

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