Installation method of diode detachable junction box, junction box and photovoltaic system

Abstract

The invention discloses a diode detachable junction box installation method, a junction box and a photovoltaic system, and the junction box comprises a junction box pedestal which is internally provided with a first conductor and a second conductor, and also comprises a box body and a diode arranged in the box body. The diode comprises a diode body, a first pin and a second pin, the first pin and the second pin are connected with the diode body, the junction box base is detachably connected with the box body, when the junction box base and the box body are assembled, the first pin is electrically connected with the first electric conductor, the second pin is electrically connected with the second electric conductor, the junction box further comprises a cover body, and the cover body covers the box body. According to the structure, the diode is installed in the box body, the first electric conductor and the second electric conductor are installed in the junction box bottom box, and the junction box base is detachably connected with the box body, so that when the diode is damaged in the use process, the diode can be rapidly replaced by disassembling the box body.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic junction boxes, and particularly to a method for installing a diode-removable junction box, a junction box, and a photovoltaic system. Background Art

[0002] The photovoltaic bypass protection module is an important component in a photovoltaic module, mainly used to improve the reliability and efficiency of a photovoltaic system. When a certain battery in a photovoltaic cell string has current mismatch due to shading, damage, or performance degradation, the bypass module can provide a low-resistance bypass path for this part of the battery, allowing the current to bypass the faulty battery and continue to flow, thereby reducing the hot spot effect and maintaining the power generation efficiency of the entire photovoltaic module. The bypass protection module consists of a diode and a conductor electrically connected to the diode.

[0003] At present, the bypass protection module is mostly installed in a junction box. During application, an insulating sealant also needs to be poured into the box body to prevent the bypass protection module in the junction box from being affected by dust and moisture. However, the diode in the box body is likely to generate a large amount of heat during normal operation and may be damaged. Once damaged, it cannot be replaced, and then the solar cell string connected in parallel with it will not play the role of bypass protection; Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a method for installing a diode-removable junction box that facilitates the replacement of a damaged diode.

[0005] The technical solution adopted by the present invention to solve its technical problems is: A method for installing a diode-removable junction box includes the following steps:

[0006] Cable installation judgment step: Determine whether the junction box base and the box body need to install cables. If the junction box base needs to install cables, then execute the cable installation step with the junction box base. If the box body needs to install cables, then execute the cable installation step with the box body;

[0007] Cable installation step with the junction box base: Fix the cable to be electrically connected to the conductor in the junction box base;

[0008] Base installation and potting step: Install the junction box base on the solar module, pour sealant into the junction box base, and perform insulation sealing on the conductor in the junction box base;

[0009] Diode installation step: Install the diode in the box body;

[0010] Cable installation step with the box body: Fix the cable to be electrically connected to the diode in the box body;

[0011] Box body potting step: Pour sealant into the box body and perform insulation sealing treatment on the diode in the box body;

[0012] Upper cover installation steps: The upper cover is installed on the box body to seal the inner cavity of the box body.

[0013] Box body and junction box base installation steps: The box body is detachably installed on the junction box base.

[0014] Furthermore: The base is installed on the solar module. The specific steps are as follows:

[0015] Align the perforations on the base with the bus bars of the solar module, and fixedly connect the bottom surface of the junction box base 1 to the solar module through an adhesive.

[0016] Respectively fixedly connect the two bus bars of the solar module to the two conductors in the base in an electrically conductive manner.

[0017] Set the annular sealing ring in the annular groove.

[0018] Furthermore: Install the diode in the box body. The specific steps are as follows: Place the positioning hole of the diode on the mounting post in the box body, and insert the two pins of the diode into the two pin through holes at the bottom of the box body respectively.

[0019] Furthermore: The installation steps of the diode are specifically as follows:

[0020] The positive and negative poles of the diode chip are electrically connected to the first conductive frame and the second conductive frame respectively.

[0021] The first pin and the second pin are fixedly connected to the first conductive frame and the second conductive frame respectively.

[0022] Furthermore: The box body is placed above the junction box base, and the side wall of the box body moves along the side wall of the junction box base towards the solar module. The outer side of the side wall of the junction box base is covered by the inner side of the side wall of the box body, so that the two pins of the diode in the box body are electrically connected to the two conductors in the junction box base respectively.

[0023] The side wall of the box body cooperates with the side wall of the junction box base to be locked.

[0024] The present invention also discloses a detachable junction box for a diode, including a junction box base. The junction box base is provided with a first conductor and a second conductor, and further includes a box body and a diode arranged in the box body. The diode includes a diode body and a first pin and a second pin connected to the diode body. The junction box base is detachably connected to the box body. When the junction box base and the box body are assembled, the first pin is electrically connected to the first conductor, the second pin is electrically connected to the second conductor, and further includes a cover body, and the cover body covers the box body.

[0025] Furthermore: The box body and the junction box base are provided with mutually cooperating locking structures.

[0026] Further: The box body includes a horizontal plate and side walls arranged around the horizontal plate. A first cavity is formed between the horizontal plate and the side walls away from the wiring box base. The diode body is installed in the first cavity, and pin through holes for the first pin and the second pin to pass through are provided on the horizontal plate.

[0027] Further: The lower part of the box body is of a concave structure. The inner side of the side wall of the box body covers the outer side of the side wall of the wiring box base. Locking structures that cooperate with each other are provided on the side wall and the wiring box base. When the wiring box base and the box body are assembled, part of the wiring box base is wrapped by the side wall, and a second cavity is formed by the wiring box base, the side wall and the horizontal plate. The first conductor and the second conductor are located in the second cavity.

[0028] Further: Installation posts for positioning the diode body are arranged in the first cavity, and positioning holes for cooperating with the installation posts are provided on the diode body.

[0029] Further: The height of the wiring box base is 7 mm - 9 mm.

[0030] Further: The diode body includes a chip, a first conductive frame, a second conductive frame and a plastic package;

[0031] The first conductive frame and the second conductive frame are respectively fixedly electrically connected to the positive and negative electrodes of the chip, or the first conductive frame and the second conductive frame are respectively fixedly electrically connected to the positive and negative electrodes of the chip through conductive connecting pieces;

[0032] The plastic package is used for insulating and sealing the chip, part of the first conductive frame and part of the second conductive frame, or the plastic package is used for insulating and sealing the chip, the conductive connecting piece, part of the first conductive frame and part of the second conductive frame.

[0033] Further: The first pin and the second pin are respectively fixedly connected to the first conductive frame and the second conductive frame.

[0034] Further: A ring groove is circumferentially arranged on the outer side of the base, and an annular sealing ring is arranged in the ring groove. When the wiring box base and the box body are assembled, the side wall abuts against the annular sealing ring.

[0035] Further: The pin through holes include a first through hole and a second through hole. The first pin passes through the first through hole and is electrically connected to the first conductor, and the second pin passes through the second through hole and is electrically connected to the second conductor.

[0036] Further, the first conductor includes a first conductor body and a first connection portion fixedly connected to the first conductor body, the second conductor includes a second conductor body and a second connection portion fixedly connected to the second conductor body, the first pin is electrically connected to the first connection portion, and the second pin is electrically connected to the second connection portion;

[0037] A perforation is provided on the junction box base, and the busbar connection ends of the first conductor body and the second conductor body are located at the perforation. The busbar connection ends of the first conductor body and the second conductor body are of a flat structure.

[0038] Further, a first embedding groove and a second embedding groove are provided in the junction box base, and the first connection portion and the second connection portion are respectively located in the first embedding groove and the second embedding groove.

[0039] Further, the first connection portion and the second connection portion are pin-shaped conductors, the first pin and the second pin are hollow socket-shaped conductors that cooperate with the first connection portion and the second connection portion, and the first pin and the second pin are respectively inserted into the first connection portion and the second connection portion and are electrically connected to the first conductor and the second conductor;

[0040] Or the first connection portion and the second connection portion are hollow socket-shaped conductors, the first pin and the second pin are pin-shaped conductors that cooperate with the first connection portion and the second connection portion, and the first pin and the second pin are respectively inserted into the first connection portion and the second connection portion and are electrically connected to the first conductor and the second conductor.

[0041] Further, sealant is provided in both the first cavity and the inner cavity of the junction box base, so that the diode, the first conductor, and the second conductor are isolated within the sealant.

[0042] Further, a cable is further included. The cable is fixedly and electrically connected to the first conductor or the second conductor in the junction box base, and a cable groove for the cable to pass through is provided on the junction box base.

[0043] Further, a cable is further included. The cable is fixedly and electrically connected to the diode body, the first pin, or the second pin in the box body.

[0044] Further, the surface of the junction box base after potting is a flat surface, and the top surface of the cover body is a flat surface.

[0045] The present invention also discloses a photovoltaic system, including the diode detachable junction box described above, and further including a photovoltaic module. A first busbar and a second busbar are provided on the photovoltaic module, and the first busbar and the second busbar respectively pass through the perforation and are electrically connected to the first conductor body and the second conductor body.

[0046] Furthermore, there are N detachable diode junction boxes, which are arranged in sequence. The cable includes a first cable and a second cable. The first cable is fixedly connected to the first pin or the first conductor in the leftmost detachable diode junction box, and the second cable is fixedly connected to the second pin or the second conductor in the rightmost detachable diode junction box.

[0047] The beneficial effects of the present invention are as follows:

[0048] 1. In this structure, the diode is installed in the box body, the first conductor and the second conductor are installed in the bottom box of the junction box, and the junction box base is detachably connected to the box body. Therefore, when the diode is damaged during use, the diode can be quickly replaced by disassembling the box body.

[0049] 2. In this structure, the accommodation of the diode can be realized through the setting of the cross plate and the side wall, which is convenient for the operation of filling and sealing the glue after the diode is assembled, preventing it from being affected by dust and water vapor, and increasing its service life.

[0050] 3. In this structure, through the setting of the annular sealing ring on the outer side of the base, the sealing performance of the connection between the junction box base and the box body can be ensured after they are connected.

[0051] 4. This method can install the junction box base on the solar module alone, and assemble the diode and the box body separately. Therefore, during transportation, the solar module with the junction box base installed alone can be transported separately, and the box body with the diode installed can be transported separately, thus greatly improving the transportation efficiency.

[0052] 5. The surface of the junction box base after filling with glue is a flat surface, so that when transporting the solar module with the junction box base installed, it can be stacked more flatly and stably, preventing the solar module from shaking and being broken during transportation. Similarly, by designing the top surface of the cover body as a flat surface, the box body with the cover body can be stacked stably during transportation, thus realizing stable transportation. Description of the Drawings

[0053] Figure 1 It is an exploded schematic view of the detachable diode junction box according to the embodiment of the present application.

[0054] Figure 2 It is a structural schematic view of the junction box base in the detachable diode junction box according to the embodiment of the present application.

[0055] Figure 3 It is a structural schematic view of the box body in the detachable diode junction box according to the embodiment of the present application.

[0056] Figure 4It is a schematic structural diagram of another perspective of the box body in the diode detachable junction box according to the embodiment of the present application.

[0057] Figure 5 It is a schematic bottom structure diagram of the photovoltaic system according to the embodiment of the present application.

[0058] Figure 6 It is a schematic structural diagram of the diode body according to the embodiment of the present application.

[0059] Figure 7 It is an interface diagram of one of the structures after the box body and the base in the present application are installed.

[0060] The markings in the figure are:

[0061] Junction box base 1, first conductor 11, first conductor body 111, first connection part 112, second conductor 12, second conductor body 121, second connection part 122, first embedding groove 13, second embedding groove 14, perforation 15, annular groove 16, annular sealing ring 17, buckle 18;

[0062] Box body 2, diode 21, diode body 211, chip 2111, first conductive frame 2112, second conductive frame 2113, plastic package 2114, conductive connection piece 2115, first pin 212, second pin 213, drum spring 214, horizontal plate 22, pin through hole 221, first through hole 2211, second through hole 2212, side wall 23, mounting post 24, first cavity 2A, second cavity 2B, card slot 28, notch 29;

[0063] Cover body 3;

[0064] First bus bar 41, second bus bar 42, first cable 43, second cable 44. Detailed implementation manners

[0065] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings.

[0066] The present invention discloses a method for installing a diode detachable junction box, including the following steps:

[0067] Cable installation judgment step: Judge whether the junction box base 1 and the box body 2 need to install cables. If the junction box base 1 needs to install cables, execute the cable and junction box base installation step. If the box body 2 needs to install cables, execute the cable and box body 2 installation step;

[0068] Cable and junction box base installation step: Fix the cable and the conductor in the junction box base 1 in electrical connection.

[0069] Base installation and potting steps: Install the junction box base 1 on the solar module, pour sealant into the junction box base 1, and perform insulation sealing on the conductors in the junction box base 1;

[0070] Diode installation steps: Install the diode 21 in the box body 2;

[0071] Cable and box body installation steps: Fix the electrical connection between the cable and the diode 21 in the box body 2;

[0072] Box body potting steps: Pour sealant into the box body 2 and perform insulation sealing treatment on the diode 21 in the box body 2;

[0073] Upper cover installation steps: Install the upper cover on the box body 2 to cover the inner cavity of the box body 2;

[0074] Box body and junction box base installation steps: The box body 2 is detachably installed on the junction box base 1.

[0075] Specifically, in the above steps, the step of installing the junction box base 1 on the solar module and the step of installing the diode 21 into the box body 2 have no sequence, and either can be carried out first or simultaneously. After the junction box base 1 is installed on the solar module, the solar module with the junction box base 1 can be transported to the use site. After the diode 21 is installed into the box body 2, the box body 2 can be transported to the use site alone, and then the box body 2 and the junction box base 1 are assembled at the use site. After the assembly of the box body 2 and the junction box base 1 is completed, the two pins of the diode 21 are electrically connected to the two conductors in the junction box base 1.

[0076] This method can install the junction box base 1 on the solar module alone and assemble the diode 21 and the box body 2 separately, so that when transporting, the solar module with the junction box base 1 installed alone can be transported separately, and the box body 2 with the diode 21 installed can be transported separately, thus greatly improving the transportation efficiency.

[0077] In this embodiment, the steps of installing the base on the solar module are as follows:

[0078] Align the perforation 15 on the junction box base 1 with the bus bar of the solar module, and fixedly connect the bottom surface of the junction box base 1 to the solar module through an adhesive;

[0079] Fix the electrical connection between the two bus bars of the solar module and the two conductors in the base respectively, and sleeved the annular sealing ring 17 in the annular groove 16.

[0080] Specifically, the fixing method of the bus bar and the conductor here can be welding, or other forms. For example, the bus bar and the conductor can be clamped or fixedly connected by using a conductive clip or a conductive sheet, etc. As long as the electrical connection between the two can be realized and the stability and reliability of the connection are ensured, they are all within the protection scope of the present invention.

[0081] In this embodiment, the diode 21 is installed in the box body 2. The specific steps are as follows: place the positioning hole of the diode 21 on the mounting post 24 in the box body 2, and insert the two pins of the diode 21 into the two pin through holes at the bottom of the box body 2 respectively.

[0082] Specifically, the setting of the mounting post 24 and the positioning hole here can realize the accurate positioning of the diode 21 in the box body 2, prevent the diode 21 from shifting or shaking during the installation process, and thus ensure the alignment accuracy between the diode 21 and the pin through hole.

[0083] In this embodiment, the installation steps of the diode 21 are specifically as follows:

[0084] The positive and negative electrodes of the diode 21 chip 2111 are electrically connected to the first conductive frame 2112 and the second conductive frame 2113 respectively;

[0085] The first pin and the second pin are fixedly connected to the first conductive frame 2112 and the second conductive frame 2113 respectively.

[0086] Specifically, the electrical connection here can be realized by welding or other methods. In addition, the setting of the first conductive frame 2112 and the second conductive frame 2113 can effectively lead out the positive and negative electrodes of the diode 21 chip 2111 and conduct electrical connection with the external conductor, thereby realizing the electrical function of the diode 21.

[0087] In this embodiment, the box body 2 is installed on the junction box base 1. The specific steps are as follows: place the box body 2 above the junction box base 1, move the side wall 23 of the box body 2 along the side wall of the junction box base 1 towards the direction of the solar module, the inner side of the side wall 23 of the box body 2 covers the outer side of the side wall of the junction box base 1, so that the two pins of the diode in the box body 2 are electrically connected to the two conductors in the junction box base 1 respectively; the side wall 23 of the box body 2 is locked in cooperation with the side wall of the junction box base 1.

[0088] Specifically, the cooperation locking method here can be a snap structure. A card slot is provided on the side wall of the box body 2, and a snap that cooperates with the card slot is provided on the side wall of the base. When the side wall of the box body 2 moves towards the solar module, the card slot cooperates with the snap to realize the locking of the box body 2 and the base. In addition, the side walls of the box body 2 and the base here can cooperate to play a guiding role, thereby facilitating the installation, disassembly and replacement of the box body 2 and the junction box base 1.

[0089] As shown Figure 1 , Figure 2 in the figure, an embodiment of the present application discloses a diode detachable junction box, which includes a junction box base 1. A first conductor 11 and a second conductor 12 are arranged in the junction box base 1. It further includes a box body 2 and a diode 21 arranged in the box body 2. The diode 21 includes a diode body 211, a first pin 212 and a second pin 213 connected to the diode body 211. The junction box base 1 and the box body 2 are detachably connected. When the junction box base 1 and the box body 2 are assembled, the first pin 212 is electrically connected to the first conductor 11, and the second pin 213 is electrically connected to the second conductor 12. It further includes a cover body 3, and the cover body 3 covers the box body 2. The surface of the junction box base 1 after potting is a flat surface, and the top surface of the cover body 2 is a flat surface.

[0090] Specifically, when assembling, first install the junction box base 1 on the photovoltaic module, then perform potting treatment in the base, so that the first conductor 11 and the second conductor 12 are sealed in the sealant. Then detachably connect the box body 2 and the junction box base 1. During the connection process, the first pin 212 is electrically connected to the first conductor 11, and the second pin 213 is electrically connected to the second conductor 12 to complete the entire installation process. When the junction box is in use and the diode 21 is damaged, only need to detach the box body 2 from the junction box base 1, and then reconnect the box body 2 containing the new diode 21 to the junction box base 1 to realize the replacement of the diode 21. In this process, no operations such as welding are required.

[0091] In this structure, by installing the diode 21 in the box body 2, installing the first conductor 11 and the second conductor 12 in the junction box base, and detachably connecting the junction box base 1 and the box body 2, when the diode 21 is damaged during use, the diode 21 can be quickly replaced by detaching the box body 2. At the same time, the surface of the junction box base after potting is a flat surface, so that when transporting the solar module equipped with the junction box base, it can be stacked more flatly and stably, preventing the solar module from shaking during transportation and causing it to be broken. Similarly, by designing the top surface of the cover body to be a flat surface, when transporting, the box body with the cover body can be stacked stably, thus realizing stable transportation.

[0092] In this embodiment, the box body 2 and the junction box base 1 are provided with a locking structure that cooperates with each other.

[0093] Specifically, the locking structure can be in various forms. For example, the cooperating locking structures can be respectively installed at the bottom of the box body and the top of the junction box base; or the cooperating locking structures can be respectively installed at the bottom of the box body and the side of the junction box, and the box body 2 is sleeved on the outer surface of the junction box base to complete the connection, or the cooperating locking structures can be respectively installed at the bottom of the box body and the side of the junction box, and the junction box base 1 is sleeved on the outer surface of the box body 2 to complete the connection.

[0094] In this embodiment, as Figure 3 shown, the box body 2 includes a cross plate 22 and side walls 23 provided around the cross plate 22. A first cavity 2A is formed between the cross plate 22 and the side of the side walls 23 away from the junction box base 1. The diode body 211 is installed in the first cavity 2A, and pin through holes 221 for the first pin 212 and the second pin 213 to pass through are provided on the cross plate 22.

[0095] Specifically, positioning rods for positioning the diode 21 can also be provided on the cross plate 22, so that the diode 21 can be accurately assembled in the box body 2. At the same time, sealant is poured into the first cavity 2A, thereby realizing the protection of the diode 21 against dust and water vapor. Only the first pin 212 and the second pin 213 of the entire box body 2 structure are exposed from the pin through holes 221. This setting, on the one hand, protects the diode 21, and on the other hand, facilitates the use and replacement of the diode 21.

[0096] In this embodiment, as Figure 4 shown, the lower part of the box body is a concave structure, and the inner side of the side wall 23 of the box body 2 covers the outer side of the side wall of the junction box base 1. The side wall 23 and the junction box base 1 are provided with cooperating locking structures. When the junction box base 1 and the box body 2 are assembled, part of the junction box base 1 is wrapped by the side wall 23, and a second cavity 2B is formed between the junction box base 1, the side wall 23 and the cross plate 22. The first conductor 11 and the second conductor 12 are located in the second cavity 2B.

[0097] It should be explained that the above locking structure can be a buckle, a clamping structure, a plug structure, etc. In this embodiment, the selected locking structure is the cooperation of the buckle 18 and the card slot 28.

[0098] Specifically, when connecting the junction box base 1 and the box body 2, the box body 2 is inserted towards the junction box base 1, so that the side wall 23 of the box body 2 is detachably and lockingly connected to the outer wall of the junction box base 1. At the same time, since the junction box base is a box shape with an open upper end, the junction box base 1, the side wall 23 and the cross plate 22 can form a second cavity 2B, so that the first conductor 11 and the second conductor 12 can be accommodated in the second cavity 2B. And because part of the junction box base 1 is wrapped by the side wall 23, the possibility of dust or water vapor entering the second cavity 2B can be reduced.

[0099] In this embodiment, an installation post 24 for positioning the diode body is provided in the first cavity, and a positioning hole for cooperating with the installation post 24 is provided on the diode body.

[0100] Specifically, the provision of the installation post 24 and the positioning hole further ensures the stability and accuracy of the diode body 211 in the first cavity 2A, effectively preventing the diode body 211 from shifting or shaking during transportation or installation, thereby ensuring the alignment accuracy between the diode body 211 and the pin through-hole 221, as well as the reliable electrical connection between the diode body 211 and the first conductor 11 and the second conductor 12. In addition, the design of the installation post 24 and the positioning hole also simplifies the installation process of the diode and improves the installation efficiency.

[0101] In this embodiment, the height of the junction box base is 7 mm - 9 mm.

[0102] Specifically, the height of the junction box base here can be 7 mm, 8 mm, 9 mm, etc. Since only the first conductor 11 and the second conductor 12 need to be accommodated in the junction box base, the height of the junction box base can be minimized as much as possible. Thus, after the junction box base is installed on the solar module, its overall thickness can be reduced, and then the number of products transported each time can be increased, thereby improving the transportation efficiency of the products.

[0103] In this embodiment, the diode body 211 includes a chip 2111, a first conductive frame 2112, a second conductive frame 2113, and a plastic package 2114;

[0104] The first conductive frame 2112 and the second conductive frame 2113 are respectively fixedly and electrically connected to the positive and negative electrodes of the chip 2111, or the first conductive frame 2112 and the second conductive frame 2113 are respectively fixedly and electrically connected to the positive and negative electrodes of the chip 2111 through conductive connection pieces 2115;

[0105] The plastic package 2114 is used for insulating and sealing the chip 2111, part of the first conductive frame 2112, and part of the second conductive frame 2113, or the plastic package 2114 is used for insulating and sealing the chip 2111, the conductive connection piece 2115, part of the first conductive frame 2112, and part of the second conductive frame 2113;

[0106] The first lead 212 and the second lead 213 are respectively fixedly connected to the first conductive frame 2112 and the second conductive frame 2113.

[0107] Specifically, in this structure, welding is used to achieve the electrical connection between the first lead 212 and the first conductive frame 2112, and the electrical connection between the second lead 213 and the second conductive frame 2113.

[0108] Specifically, in this structure, the installation of the first pin 212 and the second pin 213 can be conveniently realized through the setting of the first conductive frame 2112 and the second conductive frame 2113. At the same time, the first conductive frame 2112 and the second conductive frame 2113 can also serve as a bridge for the electrical connection between the diode chip 2111 and the external conductor, realizing the electrical function of the diode chip 2111. In addition, the setting of the plastic package 2114 not only plays an insulating and sealing role for the chip 2111, the first conductive frame 2112 and the second conductive frame 2113, but also improves the protection level of the diode, enabling it to better adapt to the complex and changeable outdoor environmental conditions.

[0109] In this embodiment, as Figure 2 shown, a ring groove 16 is circumferentially arranged on the outer side of the base, and an annular sealing ring 17 is arranged in the ring groove 16. When the junction box base 1 and the box body 2 are assembled, the side wall 23 abuts against the annular sealing ring 17.

[0110] Specifically, after the junction box base 1 and the box body 2 are assembled, the side wall 23 abuts against the annular sealing ring 17, thereby ensuring the connection sealing performance of the junction box base 1 and the box body 2.

[0111] In this embodiment, as Figure 3 shown, the pin through hole 221 includes a first through hole 2211 and a second through hole 2212. The first pin 212 passes through the first through hole 2211 and is electrically connected to the first conductor 11, and the second pin 213 passes through the second through hole 2212 and is electrically connected to the second conductor 12.

[0112] Specifically, the pin through hole 221 is set as the first through hole 2211 and the second through hole 2212, so that the two pins can pass through the two through holes respectively. Thus, the two through holes can respectively realize the positioning of the two pins, and further ensure the accuracy of the position of the diode 21 in the box body 2.

[0113] In this embodiment, as Figure 1 and Figure 2 shown, the first conductor 11 includes a first conductor body 111 and a first connecting portion 112 fixedly connected to the first conductor body 111. The second conductor 12 includes a second conductor body 121 and a second connecting portion 122 fixedly connected to the second conductor body 121. The first pin 212 is electrically connected to the first connecting portion 112, and the second pin 213 is electrically connected to the second connecting portion 122;

[0114] The junction box base 1 is provided with a perforation 15, and the bus bar connection ends of the first conductor body 111 and the second conductor body 121 are located at the perforation 15. The bus bar connection ends of the first conductor body 111 and the second conductor body 121 are of a flat structure.

[0115] Specifically, the first conductor body 111 and the second conductor body 121 are used to connect with an external bus bar. The first connection part 112 is used to connect with the first pin 212, and the second connection part 122 is used to connect with the second pin 213. Thus, the diode 21 can be connected to the bus bar on the photovoltaic module. At the same time, the bus bar connection ends of the first conductor body 111 and the second conductor body 121 are designed to be of a flat structure, which can facilitate the connection between the bus bar and the first conductor body 111 and the second conductor body 121.

[0116] In this embodiment, the first connection part 112 and the second connection part 122 are pin-shaped conductors, and the first pin 212 and the second pin 213 are hollow socket-shaped conductors that cooperate with the first connection part 112 and the second connection part 122. The first pin 212 and the second pin 213 are respectively inserted into the first connection part 112 and the second connection part 122 and are electrically connected to the first conductor 11 and the second conductor 12.

[0117] Or the first connection part 112 and the second connection part 122 are hollow socket-shaped conductors, and the first pin 212 and the second pin 213 are pin-shaped conductors that cooperate with the first connection part 112 and the second connection part 122. The first pin 212 and the second pin 213 are respectively inserted into the first connection part 112 and the second connection part 122 and are electrically connected to the first conductor 11 and the second conductor 12;

[0118] A drum spring 214 is arranged inside the hollow socket-shaped conductor.

[0119] Specifically, in the above structure, the drum spring 214 can ensure that the first pin 212 is in full contact with the first connection part 112, and the second pin 213 is in full contact with the second connection part 122.

[0120] It should be explained that the above two are preferred embodiments, and there can also be the following embodiments: for example, one of the first connection part 112 and the second connection part 122 is a hollow socket-shaped conductor, and the other is a pin-shaped conductor. Correspondingly, one of the first pin 212 and the second pin 213 is a cooperating pin-shaped conductor, and the other is a hollow socket-shaped conductor. It can also be a plug-in connection structure of other shapes.

[0121] In this embodiment, as Figure 2As shown, a first embedding groove 13 and a second embedding groove 14 are provided in the junction box base 1, and the first connecting portion 112 and the second connecting portion 122 are respectively located in the first embedding groove 13 and the second embedding groove 14;

[0122] The first connecting portion 112 and the second connecting portion 122 are pin-shaped conductors, and the first pin 212 and the second pin 213 are hollow socket-shaped conductors that cooperate with the first connecting portion 112 and the second connecting portion 122. The first pin 212 and the second pin 213 are respectively inserted into the first connecting portion 112 and the second connecting portion 122 and are electrically connected to the first conductor 11 and the second conductor 12.

[0123] It should be explained that the gap formed between the first embedding groove 13 and the first connecting portion 112 is available for the first pin 212 to be inserted, and the gap formed between the second embedding groove 14 and the second connecting portion 122 is available for the second pin 213 to be inserted.

[0124] Specifically, when installing this structure, first install the junction box base 1 on the photovoltaic module. The first conductor 11 and the second conductor 12 are respectively electrically connected to the bus bar of the photovoltaic module. Then, glue filling treatment is carried out inside the base. Due to the arrangement of the first embedding groove 13 and the second embedding groove 14, it can be ensured that during the glue filling treatment, the glue will not block the periphery of the first connecting portion 112 and the second connecting portion 122, so that the hollow socket-shaped first pin 212 and second pin 213 can still achieve plugging with the first connecting portion 112 and the second connecting portion 122 after the glue filling of the junction box base 1 is completed.

[0125] In this embodiment, sealant is provided in both the first cavity 2A and the inner cavity of the junction box base 1, so that the diode 21, the first conductor 11 and the second conductor 12 are isolated within the sealant.

[0126] In this structure, through the arrangement of the sealant, the diode 21, the first conductor 11 and the second conductor 12 can be hermetically isolated, thereby preventing dust and moisture from affecting them.

[0127] In this embodiment, it further includes a cable. The following are two connection methods of the cable:

[0128] The first connection method is: the cable is fixedly electrically connected to the first conductor 11 or the second conductor 12 in the junction box base 1, and a cable groove for the cable to pass through is provided on the junction box base 1.

[0129] In the above structure, when the diode 21 is damaged, only the box body 2 needs to be disassembled and replaced, and there is no need to replace the cable, thus saving the replacement cost of the junction box.

[0130] The second connection method is that the cable is fixedly and electrically connected to the diode body, the first pin 212, or the second pin 213 inside the box body 2.

[0131] In the above structure, since the cable is connected to the box body, after the junction box base 1 is fixedly installed with the solar module, transportation can be carried out immediately. Since the junction box base 1 is thin and small in volume, the volume of the solar module can be saved, and thus the number of products transported each time can be increased. When the products are transported to the destination, the box body 2 with the cable already installed is then installed with the junction box base, thereby saving transportation costs.

[0132] In this embodiment, a notch 29 is further provided at the bottom of the box body 2. The design of this notch 29 facilitates the insertion of the head of the disassembly tool into the notch 29 when disassembling the box body 2, and prying open the box body 2 to complete the disassembly of the entire box body.

[0133] The present invention also discloses a photovoltaic system, as Figure 1 and Figure 5 shown, which includes the diode detachable junction box described above, and also includes a photovoltaic module. A first bus bar 41 and a second bus bar 42 are provided on the photovoltaic module, and the first bus bar 41 and the second bus bar 42 respectively pass through the through holes 15 and are electrically connected to the first conductor body 111 and the second conductor body 121.

[0134] During specific application, when the diode 21 in the photovoltaic system is damaged during use, the damaged box body 2 can be detached from the junction box base 1, and then a new box body 2 can be installed to achieve rapid replacement of the diode 21. Furthermore, there is no need to perform large-scale disassembly and repair on the entire photovoltaic system, greatly improving the maintenance efficiency and reliability of the photovoltaic system.

[0135] In this embodiment, there are N diode detachable junction boxes, and the N diode detachable junction boxes are arranged in sequence. The cable includes a first cable 43 and a second cable 44. The first cable 43 is fixedly connected to the first pin 212 or the first conductor 11 in the leftmost diode detachable junction box, and the second cable 44 is fixedly connected to the second pin 213 or the second conductor 12 in the rightmost diode detachable junction box.

[0136] Specifically, preferably, the first cable 43 is fixedly connected to the first conductor 11, and the second cable 44 is fixedly connected to the second conductor 12. This setting enables the replacement of the diode 21 without synchronously replacing the cable, thereby making the use of the photovoltaic system more convenient.

[0137] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only for the specific embodiments of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for installing a detachable diode junction box, characterized in that: The steps include: Cable installation judgment step: judging whether the junction box base (1) and the box body (2) need to be installed with cables; if the junction box base (1) needs to be installed with cables, then executing the cable and junction box base installation step; if the box body (2) needs to be installed with cables, then executing the cable and box body (2) installation step; The steps of installing the cable and the junction box base are as follows: fixing and electrically connecting the cable to the conductor in the junction box base (1); Base installation and glue pouring steps: installing the junction box base (1) on the solar panel, pouring sealant into the junction box base (1), and insulating and sealing the conductor in the junction box base (1); Diode installation step: installing the diode (21) in the box body (2); Cable and box installation steps: fix the cable and the diode (21) in the box (2) to be electrically connected; Box body glue filling step: filling the box body (2) with sealant to insulate and seal the diode (21) in the box body (2); Upper cover installation step: the upper cover is installed on the box body (2) to seal the inner cavity of the box body (2); The box body and the junction box base are installed in steps: the box body (2) can be detachably installed on the junction box base (1).

2. The method for installing a detachable diode junction box according to claim 1, characterized in that: Install the base on the solar panel. The specific steps are as follows: Align the through hole (15) on the junction box base (1) with the busbar of the solar panel, and fix the bottom surface of the junction box base (1) to the solar panel by means of adhesive; The two busbars of the solar module are respectively fixedly electrically connected to the two conductors in the base; The annular sealing ring (17) is sleeved in the annular groove (16).

3. The method for installing a detachable diode junction box according to claim 1, characterized in that: The diode (21) is installed in the box body (2), and the specific steps are: placing the positioning hole of the diode (21) on the installation column (24) in the box body (2), and inserting the two pins of the diode (21) into the two pin through holes at the bottom of the box body (2) respectively.

4. The method for installing a detachable diode junction box according to claim 3, characterized in that: The steps of installing the diode (21) are specifically as follows: The positive and negative electrodes of the chip (2111) of the diode (21) are electrically connected to the first conductive frame (2112) and the second conductive frame (2113) respectively; The first pin and the second pin are fixedly connected to the first conductive frame (2112) and the second conductive frame (2113) respectively.

5. The method for installing a detachable diode junction box according to claim 1, characterized in that: The box body (2) is installed on the junction box base (1), and the specific steps are as follows: the box body (2) is placed above the junction box base (1), the side wall (23) of the box body (2) moves along the side wall of the junction box base (1) toward the direction of the solar panel, and the inner side of the side wall (23) of the box body (2) covers the outer side wall of the junction box base (1), so that two pins of the diode in the box body (2) are respectively electrically connected to two conductors in the junction box base (1); The side wall (23) of the box body (2) is matched and locked with the side wall of the junction box base (1).

6. A diode detachable junction box, characterized in that: The invention comprises a junction box base (1), wherein a first conductor (11) and a second conductor (12) are arranged in the junction box base (1), and further comprises a box body (2) and a diode (21) arranged in the box body (2), wherein the diode (21) comprises a diode body (211) and a first pin (212) and a second pin (213) connected to the diode body (211), wherein the junction box base (1) and the box body (2) are detachably connected, and when the junction box base (1) and the box body (2) are assembled, the first pin (212) is electrically connected to the first conductor (11), and the second pin (213) is electrically connected to the second conductor (12), and further comprises a cover body (3), wherein the cover body (3) covers the box body (2), wherein the surface of the junction box base (1) after being filled with glue is a flush surface, and the top surface of the cover body (3) is a flush surface.

7. A diode detachable junction box as claimed in claim 6, characterized in that: The box body (2) comprises a transverse plate (22) and side walls (23) arranged around the transverse plate (22); the transverse plate (22) and the side walls (23) form a first cavity (2A) on a side away from the junction box base (1); the diode body (211) is installed in the first cavity (2A); and the transverse plate (22) is provided with a pin through hole (221) for the first pin (212) and the second pin (213) to pass through.

8. A diode detachable junction box as claimed in claim 7, characterized in that: The lower part of the box body is a concave structure, the inner side of the side wall (23) of the box body (2) covers the outer side wall of the junction box base (1), and the side wall (23) and the junction box base (1) are provided with mutually matching locking structures. When the junction box base (1) and the box body (2) are assembled, part of the junction box base (1) is wrapped by the side wall (23), and the junction box base (1) and the side wall (23) and the cross plate (22) form a second cavity (2B), and the first conductor (11) and the second conductor (12) are located in the second cavity (2B).

9. A detachable diode junction box as claimed in claim 7, characterized in that: A mounting post (24) for positioning the diode body is arranged in the first cavity, and a positioning hole for cooperating with the mounting post (24) is arranged on the diode body.

10. The diode detachable junction box according to claim 6, characterized in that: The height of the junction box base is 7mm-9mm.

11. A detachable diode junction box as claimed in claim 6, characterized in that: The diode body (211) comprises a chip (2111), a first conductive frame (2112), a second conductive frame (2113) and a plastic package (2114); The first conductive frame (2112) and the second conductive frame (2113) are respectively fixedly electrically connected to the positive and negative electrodes of the chip (2111), or the first conductive frame (2112) and the second conductive frame (2113) are respectively fixedly electrically connected to the positive and negative electrodes of the chip (2111) via conductive connecting sheets (2115); The plastic package (2114) is used to insulate and seal the chip (2111), part of the first conductive frame (2112) and part of the second conductive frame (2113), or the plastic package (2114) is used to insulate and seal the chip (2111), the conductive connecting sheet (2115), part of the first conductive frame (2112) and part of the second conductive frame (2113); The first pin (212) and the second pin (213) are fixedly connected to the first conductive frame (2112) and the second conductive frame (2113) respectively.

12. A diode detachable junction box as claimed in claim 7, characterized in that: An annular groove (16) is circumferentially arranged on the outer side of the base, and an annular sealing ring (17) is arranged in the annular groove (16); when the junction box base (1) and the box body (2) are assembled, the side wall (23) abuts against the annular sealing ring (17); The pin through hole (221) comprises a first through hole (2211) and a second through hole (2212); the first pin (212) passes through the first through hole (2211) and is electrically connected to the first conductor (11); the second pin (213) passes through the second through hole (2212) and is electrically connected to the second conductor (12).

13. A detachable diode junction box as claimed in claim 6, characterized in that: The first conductor (11) comprises a first conductor body (111) and a first connection portion (112) fixedly connected to the first conductor body (111); the second conductor (12) comprises a second conductor body (121) and a second connection portion (122) fixedly connected to the second conductor body (121); the first pin (212) is electrically connected to the first connection portion (112); and the second pin (213) is electrically connected to the second connection portion (122); The junction box base (1) is provided with a through hole (15), the busbar connection ends of the first conductor body (111) and the second conductor body (121) are located at the through hole (15), and the busbar connection ends of the first conductor body (111) and the second conductor body (121) are flat structures.

14. A diode detachable junction box as claimed in claim 6, characterized in that: A first embedding groove (13) and a second embedding groove (14) are provided in the junction box base (1), and the first connecting portion (112) and the second connecting portion (122) are respectively located in the first embedding groove (13) and the second embedding groove (14).

15. A diode detachable junction box as claimed in claim 6, characterized in that: The first connecting portion (112) and the second connecting portion (122) are pin-shaped conductors, the first pin (212) and the second pin (213) are hollow sleeve-shaped conductors that match the first connecting portion (112) and the second connecting portion (122), the first pin (212) and the second pin (213) are respectively inserted into the first connecting portion (112) and the second connecting portion (122) and are electrically connected to the first conductor (11) and the second conductor (12); Or the first connecting portion (112) and the second connecting portion (122) are hollow socket-shaped conductors, the first pin (212) and the second pin (213) are pin-shaped conductors that match the first connecting portion (112) and the second connecting portion (122), the first pin (212) and the second pin (213) are respectively inserted into the first connecting portion (112) and the second connecting portion (122) and are electrically connected to the first conductor (11) and the second conductor (12); A drum spring (214) is arranged in the hollow sleeve-shaped conductor.

16. A diode detachable junction box as claimed in claim 6, characterized in that: Sealant is provided in the first cavity (2A) and the inner cavity of the junction box base (1), so that the diode (21), the first conductor (11) and the second conductor (12) are isolated in the sealant.

17. A detachable diode junction box as claimed in claim 6, characterized in that: It also includes a cable, the cable being fixedly electrically connected to the first conductor (11) or the second conductor (12) in the junction box base (1), and the junction box base (1) is provided with a cable groove for the cable to pass through; Or the cable is fixedly electrically connected to the diode body or the first pin (212) or the second pin (213) in the box body (2).

18. A photovoltaic system comprising the diode detachable junction box according to any one of claims 6 to 17, characterized in that: It also includes a photovoltaic assembly, on which a first busbar (41) and a second busbar (42) are arranged, and the first busbar (41) and the second busbar (42) respectively pass through the through holes (15) to be electrically connected to the first conductor body (111) and the second conductor body (121).

19. The photovoltaic system according to claim 18, characterized in that: The number of the detachable diode junction boxes is N, and the N detachable diode junction boxes are arranged in sequence. The cables include a first cable (43) and a second cable (44). The first cable (43) is fixedly connected to a first pin (212) or a first conductor (11) in the leftmost detachable diode junction box, and the second cable (44) is fixedly connected to a second pin (213) or a second conductor (12) in the rightmost detachable diode junction box.

Images