Junction box and photovoltaic module

Abstract

This application discloses a junction box and a photovoltaic module. The junction box includes a housing, two conductive components, a diode, and a sealing component. The housing includes a box body and a cover body. The box body has a receiving cavity and a partition, which divides the receiving cavity into a first cavity and a second cavity. The first cavity is filled with potting compound, and the cover body is placed on the open side of the receiving cavity. Part of the conductive component is disposed in the first cavity, and another part extends through the partition body into the second cavity. The diode is disposed in the second cavity and is electrically connected to both conductive components. The sealing component is disposed on the open side of the second cavity and is used to seal the gap between the open side of the second cavity and the cover body. Compared with the junction box of related technologies that uses an integral potting process, the junction box and photovoltaic module of this application do not require destructive removal when the diode is damaged and needs repair. This not only reduces repair time and improves repair efficiency, but also reduces the possibility of diode damage during repair.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and more specifically, to a junction box and a photovoltaic module. Background Technology

[0002] Junction boxes, as a key component of photovoltaic modules, are mainly used for electrical connections, safety protection, and signal transmission. In related technologies, junction boxes contain diodes to ensure the photovoltaic modules can still function normally when blocked from sunlight. Generally, junction boxes are primarily potted, using a whole-piece potting process. This means that diode damage requires destructive removal, resulting in time-consuming repairs and a high failure rate. Utility Model Content

[0003] This application provides a junction box and a photovoltaic module to solve the technical problem that the need for destructive removal when diodes are damaged leads to time-consuming repairs and a high failure rate.

[0004] The junction box provided in the first aspect of this application includes a housing, two conductive components, a diode, and a sealing component. The housing includes a box body and a cover. The box body has a receiving cavity and a partition, the partition dividing the receiving cavity into a first cavity and a second cavity. The first cavity is filled with potting compound. The cover is disposed on the open side of the receiving cavity. A portion of the conductive component is disposed in the first cavity, and another portion extends through the partition into the second cavity. The diode is disposed in the second cavity and is electrically connected to both conductive components. The sealing component is disposed on the open side of the second cavity and is used to seal the gap between the open side of the second cavity and the cover.

[0005] In some embodiments, the box body includes a peripheral sidewall and a loading portion. The peripheral sidewall is connected to the loading portion and together with the partition portion forms the first cavity and the second cavity. The loading portion is provided with a through hole, which communicates with the first cavity.

[0006] In some embodiments, the conductive element is provided with a clearance hole; one of the loading part and the partition part is provided with a positioning protrusion, and the other is provided with a positioning groove. The positioning protrusion passes through the clearance hole and cooperates with the positioning groove to connect the loading part and the partition part.

[0007] In some embodiments, the conductive element is provided with a mating portion; the loading portion is provided with a connecting portion, the connecting portion engaging with the mating portion to connect the conductive element and the loading portion.

[0008] In some embodiments, the diode includes a diode body and two leads, the leads being electrically connected to the diode body; the conductive element includes a body portion and a bent portion, the bent portion being bent away from the body portion in a direction away from the body portion, the bent portion having a slot for engaging the leads, so that the conductive element and the diode are electrically connected.

[0009] In some embodiments, the conductive element includes a body portion, the body portion including a first sub-part and a second sub-part, the first sub-part being disposed in the first cavity, the second sub-part being disposed in the second cavity, the first sub-part extending from one end of the second sub-part in a direction away from the second sub-part, and the free end of the first sub-part being spaced apart from the loading portion of the housing.

[0010] In some embodiments, in the direction from the box body to the cover body, the open side of the second cavity protrudes beyond the open side of the first cavity.

[0011] In some embodiments, the second cavity is filled with potting compound.

[0012] In some embodiments, the junction box further includes a cable, one end of which passes through the box body and extends into the first cavity to be electrically connected to one of the two conductive elements.

[0013] The photovoltaic module provided in the second aspect of this application includes the junction box described in any of the above embodiments.

[0014] In the junction box and photovoltaic module of this application embodiment, the diode is disposed in the second cavity, and the sealing member is disposed on the open side of the second cavity and is used to seal the gap between the open side of the second cavity and the cover. Therefore, compared with the junction box of the related technology that adopts the overall potting process, when the diode is damaged and needs to be repaired, there is no need to destructively remove it. This can reduce the repair time and improve the repair efficiency. On the other hand, it can reduce the possibility of diode damage during repair and reduce maintenance costs. Furthermore, after the diode is repaired, the sealing member can still seal the gap between the open side of the second cavity and the cover, thereby ensuring the sealing and protection effect of the diode during the subsequent operation of the junction box.

[0015] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0017] Figure 1This is a schematic diagram of a portion of the structure of a photovoltaic module according to certain embodiments of this application;

[0018] Figure 2 This is a three-dimensional structural diagram of a junction box according to certain embodiments of this application;

[0019] Figure 3 yes Figure 2 An exploded 3D view of the junction box shown.

[0020] Figure 4 yes Figure 2 A schematic diagram of the planar structure of the middle part of the junction box shown;

[0021] Figure 5 yes Figure 2 A three-dimensional structural diagram of the middle part of the junction box shown;

[0022] Figure 6 yes Figure 2 The diagram shows a cross-sectional view of the junction box.

[0023] Explanation of key component symbols:

[0024] 300 photovoltaic modules;

[0025] 100 junction boxes, 200 battery cells;

[0026] 10 Housing; 11 Box body; 111 Receiving cavity; 1111 First cavity; 1113 Open side of the first cavity; 1115 Second cavity; 1117 Open side of the second cavity; 113 Divider; 1131 Positioning groove; 115 Peripheral sidewall; 117 Loading part; 1171 Through hole; 1173 Positioning protrusion; 1175 Connecting part; 13 Cover; 20 Potting compound;

[0027] 30 Conductive component, 31 Clearance hole, 33 Mating part, 35 Body part, 351 First sub-part, 353 Second sub-part, 3531 First section, 3533 Second section, 37 Bending part, 371 Slot;

[0028] 50 Diode, 51 Diode Body, 53 Pin; 70 Seal; 90 Cable. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0030] In the description of this application, it should be understood that the terms "thickness," "upper," "top," "bottom," "inner," "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly. In one example, they can be a fixed connection, a detachable connection, or an integral connection; they can be a mechanical connection, an electrical connection, or a connection that allows communication between them; they can be a direct connection or an indirect connection through an intermediate medium; they can be the internal connection of two elements or the interaction between two elements.

[0032] Junction boxes, as a key component of photovoltaic modules, primarily function to provide electrical connections, safety protection, and signal transmission. In related technologies, junction boxes often contain diodes to ensure the photovoltaic modules can function normally when blocked from sunlight. Generally, junction boxes are primarily potted, employing a complete potting process. This necessitates destructive removal when diodes fail, resulting in time-consuming repairs and a high failure rate. To address these issues, please refer to [link to relevant documentation]. Figure 1 and Figure 2 This application provides a junction box 100 and a photovoltaic module 300.

[0033] Please see Figure 1 and Figure 2 The photovoltaic module 300 of this application includes a junction box 100. It is understood that the photovoltaic module 300 is a structure capable of converting solar energy into electrical energy. In some embodiments of this application, the photovoltaic module 300 includes a plurality of solar cells 200, which are electrically connected to each other. The solar cells 200 are used to convert solar energy into electrical energy. The solar cells 200 can be different types of solar energy conversion devices such as perovskite cells, monocrystalline silicon, polycrystalline silicon, or thin-film solar cells. Users can select solar cells 200 with different efficiencies and sizes according to their usage needs and environmental conditions.

[0034] Junction box 100 is a component in photovoltaic module 300 used to realize functions such as electrical connection, safety protection, and signal transmission. In some embodiments of this application, photovoltaic module 300 also includes a busbar, and junction box 100 can be electrically connected to the solar cells 200 of photovoltaic module 300 through the busbar. Further, junction box 100 can also be electrically connected to an inverter to transmit the electrical energy generated by solar cells 200 to the inverter. For example, the inverter may include a DC / AC converter, in which case the inverter can convert the direct current (DC) generated by solar cells 200 into alternating current (AC) and provide it to AC equipment or connect it to the mains power grid.

[0035] Since the photovoltaic module 300 in this embodiment includes a junction box 100, it is understood that the photovoltaic module 300 has at least the same beneficial effects as the junction box 100. Therefore, for the beneficial effects of the photovoltaic module 300, please refer to the beneficial effects of the junction box 100 described below.

[0036] Please see Figure 2 and Figure 3 The junction box 100 of this application includes a housing 10, two conductive elements 30, a diode 50, and a sealing element 70. The housing 10 includes a box body 11 and a cover 13. The box body 11 has a receiving cavity 111 and a partition 113. The partition 113 is used to divide the receiving cavity 111 into a first cavity 1111 and a second cavity 1115. The first cavity 1111 is filled with potting compound 20. The cover 13 is provided on the open side of the receiving cavity 111 (including the open side 1113 of the first cavity and the open side 1117 of the second cavity). Part of the conductive element 30 is provided in the first cavity 1111, and the other part extends through the partition 113 into the second cavity 1115. The diode 50 is provided in the second cavity 1115 and is electrically connected to both conductive elements 30. The sealing element 70 is provided on the open side 1117 of the second cavity and is used to seal the gap between the open side 1117 of the second cavity and the cover 13.

[0037] It is understood that the housing 10 is a structure in the junction box 100 used to house components such as the conductive element 30, diode 50, and sealing element 70. The housing 10 can be made of metallic and / or non-metallic materials. For example, the housing 10 is made of polycarbonate, which has advantages such as good transparency, easy coloring, low water absorption, high mechanical strength, and good toughness. Polycarbonate also has good heat and weather resistance and high dimensional stability. Therefore, using polycarbonate to make the housing 10 can effectively improve the structural strength of the housing 10, enhance its ability to resist external environments (such as wind, rain, snow, etc.), ensure the stability and reliability of the junction box 100's operation, and extend the service life of the junction box 100. In some embodiments, the box body 11 and the cover 13 are made of the same material; for example, both the box body 11 and the cover 13 are made of polycarbonate. In other embodiments, the box body 11 and the cover 13 are made of different materials; for example, the box body 11 is made of polycarbonate, and the cover 13 is made of aluminum alloy.

[0038] In some embodiments of this application, the partition 113 is disposed within the receiving cavity 111, and divides the receiving cavity 111 into sections along a first direction (e.g., Figure 4 The first cavity 1111 and the second cavity 1115 are arranged at intervals in the vertical direction, and the partition 113 is arranged along the second direction (such as...). Figure 4 The first direction extends perpendicular to the second direction, and both the first and second directions are perpendicular to the direction from the housing 11 to the cover 13. It should be noted that the two conductive elements 30 can be arranged at intervals along the second direction, with a portion of the conductive element 30 located within the first cavity 1111, and another portion extending along the first direction through the partition 113 into the second cavity 1115. A diode 50 is disposed in the second cavity 1115 and is electrically connected to the portions of the two conductive elements 30 extending into the second cavity 1115.

[0039] In some embodiments, the housing 11 and the cover 13 can be connected by snap-fit, bolt, or magnetic connection. That is, the cover 13 is detachably mounted on the open side of the receiving cavity 111. When the cover 13 is mounted on the open side of the receiving cavity 111, the housing 11 and the cover 13 together protect the components (e.g., diode 50) within the receiving cavity 111, reducing the possibility of damage to the components and ensuring the normal operation of the junction box 100. When the cover 13 is not mounted on the open side of the receiving cavity 111, the receiving cavity 111 is open, allowing operators to inspect and repair the components within the receiving cavity 111, ensuring the normal operation of the junction box 100. For example, the outer peripheral wall of the housing 11 may be provided with a snap-fit ​​structure, and the cover 13 may be provided with a retaining structure. The snap-fit ​​structure and the retaining structure cooperate to achieve a snap-fit ​​connection between the housing 11 and the cover 13.

[0040] The conductive component 30 is a structure in the junction box 100 used for electrically connecting the photovoltaic module 300 and the diode 50. The materials of the conductive component 30 include, but are not limited to, aluminum alloy, copper, silver, carbon fiber, and composite conductive plastics. Please refer to... Figure 1 In some embodiments of this application, the conductive element 30 can be electrically connected to the solar cell 200 of the photovoltaic module 300 via a busbar, and the diode 50 is connected in parallel with the solar cell 200. It should be noted that in some embodiments, the conductive element 30 is provided with solder pads, and the conductive element 30 can be soldered to the busbar via the solder pads.

[0041] For example, photovoltaic module 300 includes a first cell string ( Figure 1 The battery string located above the junction box 100) and the second battery string ( Figure 1 The battery strings located below the junction box 100 each include two battery cells 200 connected in series. One of the two conductive elements 30 is electrically connected to one battery cell 200 in the first and second battery strings via a busbar, and the other of the two conductive elements 30 is electrically connected to another battery cell 200 in the first and second battery strings via a busbar, thus connecting the diode 50 in parallel with four battery cells 200.

[0042] In some embodiments, the first cavity 1111 is filled with potting compound 20. The potting compound 20 has advantages such as waterproofing, moisture resistance, dustproofing, insulation, thermal conductivity, airtightness, corrosion resistance, temperature resistance, and shock absorption. The potting compound 20 can be made from at least one of epoxy resin, silicone, or other materials. Therefore, the potting compound 20 can seal and protect the first cavity 1111, preventing water or moisture from entering and causing corrosion or damage to the components (such as conductive parts 30) within the first cavity 1111. This extends the service life of the components within the first cavity 1111 and improves the stability and reliability of the junction box 100.

[0043] It should be noted that while solar cells 200 can generate electricity under sunlight, if some solar cells 200 are shaded, damaged, have manufacturing defects, or have inconsistent performance, these solar cells 200 (e.g., shaded solar cells 200) will not only fail to generate electricity but will also consume the energy generated by other normal solar cells 200 (e.g., unshaded solar cells 200). This causes the temperature of these solar cells 200 to rise abnormally, resulting in localized overheating, which is known as the hot spot effect. The hot spot effect can cause the temperature of the solar cells 200 to rise significantly, potentially exceeding their tolerance limits, leading to permanent damage such as solar cell burnout, solder melting, and aging of encapsulation materials. In severe cases, it can even cause a fire.

[0044] In some embodiments of this application, the junction box 100 includes a diode 50 connected in reverse parallel with the solar cell 200. When the solar cell 200 is not shaded, i.e., when the solar cell 200 is generating electricity normally, the diode 50 is in a cutoff state. When the solar cell 200 is shaded, the diode 50 connected in parallel with the shaded solar cell 200 is in a conducting state, allowing current to bypass the shaded solar cell 200 and preventing overheating and damage. This reduces the likelihood of damage to the photovoltaic module 300 due to hot spot effects, thereby preventing the energy generated by the solar cell 200 from being consumed by the shaded solar cell 200, improving the power generation efficiency of the photovoltaic module 300; and also improving the stability and reliability of the photovoltaic module 300's operation, extending its service life. It should be noted that in some embodiments, diode 50 can be a bypass diode, which can be a Schottky diode, a metal-oxide-semiconductor field-effect transistor (MOSFET), or other types of diodes. This application does not impose any restrictions.

[0045] The sealing element 70 is a structure in the junction box 100 used to seal the gap between the open side 1117 of the second cavity and the cover 13. The material of the sealing element 70 includes, but is not limited to, silicone, rubber (e.g., silicone rubber, fluororubber, EPDM rubber, etc.). In some embodiments of this application, the sealing element 70 is disposed on the open side 1117 of the second cavity and surrounds the opening of the second cavity 1115. When the cover 13 is connected to the box body 11, the sealing element 70 is sandwiched between the cover 13 and the box body 11. Therefore, the sealing element 70 can seal the gap between the open side 1117 of the second cavity and the cover 13, preventing water or moisture from entering the second cavity 1115 and causing corrosion or damage to the components (e.g., diode 50) inside the second cavity 1115. This extends the service life of the components inside the second cavity 1115 and improves the stability and reliability of the junction box 100.

[0046] In some embodiments, the second cavity 1115 is filled with potting compound (not shown in the figure). This potting compound, together with the sealing element 70, seals the second cavity 1115, thereby improving the sealing and protection effect. Furthermore, after the potting compound in the second cavity 1115 is removed to repair the diode 50, the junction box 100 can still use the sealing element 70 to provide sealing protection for the diode 50. This prevents the problem of the junction box 100's sealing and protection effect for the diode 50 deteriorating due to the inability to replenish the potting compound after removal, thus effectively improving the stability and reliability of the junction box 100's operation. It should be noted that the potting compound in this embodiment has essentially the same performance and material as the potting compound 20 in the first cavity 1111 in the above embodiments, and will not be described in detail here.

[0047] Understandably, when the second cavity 1115 is not filled with potting compound, that is, when the junction box 100 only uses the sealant 70 to seal and protect the diode 50, the amount of potting compound required for the junction box 100 is less, which can reduce production costs and help improve the product competitiveness of the junction box 100.

[0048] In the junction box 100 of this embodiment, the diode 50 is disposed in the second cavity 1115, and the sealing member 70 is disposed on the open side 1117 of the second cavity and is used to seal the gap between the open side 1117 of the second cavity and the cover 13. Therefore, compared with the junction box of the related art that adopts the overall potting process, when the diode 50 is damaged and needs to be repaired, there is no need to destructively remove it. This can reduce the repair time and improve the repair efficiency. On the other hand, it can reduce the possibility of damage to the diode 50 during repair and reduce the maintenance cost. Furthermore, after the diode 50 is repaired, the sealing member 70 can still seal the gap between the open side 1117 of the second cavity and the cover 13, thereby ensuring the sealing and protection effect of the junction box 100 on the diode 50 during subsequent operation.

[0049] In addition, the diode 50 is located in the second cavity 1115 to prevent the heat generated by the diode 50 during operation from adversely affecting other components. For example, it prevents the heat of the diode 50 from affecting the welding area between the conductive component 30 and the busbar, thereby slowing down the aging rate of the welding area and helping to extend the service life of the junction box 100.

[0050] In addition, the diode 50 is separately located in the second cavity 1115, which can increase the heat dissipation capacity of the diode 50, improve the heat dissipation effect, reduce the possibility of overheating damage to the diode 50, and extend the service life of the diode 50.

[0051] The junction box 100 will be further described below with reference to the attached drawings.

[0052] Please see Figure 3 and Figure 4 In some embodiments, the box body 11 includes a peripheral sidewall 115 and a loading part 117. The peripheral sidewall 115 is connected to the loading part 117 and together with the partition part 113, forms a first cavity 1111 and a second cavity 1115. The loading part 117 is provided with a through hole 1171, which communicates with the first cavity 1111.

[0053] Specifically, in some embodiments, in the direction from the housing 11 to the cover 13 (e.g.) Figure 6 In the vertical direction, the peripheral sidewall 115 includes a first end and a second end, with a loading part 117 connected to the first end and a cover 13 covering the second end. A partition 113 is connected to the inner side of the peripheral sidewall 115 and to the loading part 117. Thus, the peripheral sidewall 115, the loading part 117, and the partition 113 together form a first cavity 1111 and a second cavity 1115. The loading part 117 has two through holes 1171, which penetrate the loading part 117 and communicate with the first cavity 1111. The through holes 1171 allow the busbar to extend into the first cavity 1111 so that the busbar is electrically connected to the conductive element 30.

[0054] More specifically, in some embodiments, the peripheral sidewall 115 and the partition 113 are an integral structure, that is, the peripheral sidewall 115 and the partition 113 are an integral structure made by an integral molding process. This can improve the connection strength between the peripheral sidewall 115 and the partition 113, reduce the possibility of separation between the peripheral sidewall 115 and the partition 113, and improve the stability and reliability of the junction box 100.

[0055] In other embodiments, the peripheral sidewall 115 and the partition 113 are separate structures, that is, the peripheral sidewall 115 and the partition 113 are two different structures. The peripheral sidewall 115 and the partition 113 can be combined using either a detachable or non-detachable connection method. Detachable connection methods include, but are not limited to, snap-fit ​​connections and bolt connections; non-detachable connection methods include, but are not limited to, bonding or welding.

[0056] In some embodiments, the peripheral sidewall 115 and the loading part 117 are separate structures. That is, the peripheral sidewall 115 and the loading part 117 are two different structures. The peripheral sidewall 115 and the loading part 117 can be combined using a detachable or non-detachable connection method. Exemplary methods for connecting the peripheral sidewall 115 and the loading part 117 include, but are not limited to, ultrasonic engagement, mechanical engagement, and bolted connection.

[0057] In this embodiment, the peripheral sidewall 115 and the partition 113 are integrated, while the peripheral sidewall 115 and the loading part 117 are separate structures, as an example for explanation. The assembly steps of the box body 11 and the conductive component 30 may include: first, installing the conductive component 30 onto the loading part 117; then, connecting the loading part 117 to the peripheral sidewall 115 and / or the partition 113, thereby completing the assembly of the box body 11 and the conductive component 30. Therefore, compared to assembling the box body 11 first and then sequentially installing the conductive component 30 and the partition 113 onto the box body 11, there is more operating space during the installation of the conductive component 30, which helps to improve assembly efficiency.

[0058] Please see Figures 4 to 6 In some embodiments, the conductive element 30 is provided with a clearance hole 31; one of the loading part 117 and the partition part 113 is provided with a positioning protrusion 1173, and the other is provided with a positioning groove 1131. The positioning protrusion 1173 passes through the clearance hole 31 and engages with the positioning groove 1131 to connect the loading part 117 and the partition part 113. For ease of explanation, the following embodiments will be described using the example of the loading part 117 having a positioning protrusion 1173 and the partition part 113 having a positioning groove 1131.

[0059] The positioning protrusion 1173 and positioning groove 1131 provide positioning for the connection between the loading part 117 and the partition part 113, making the connection positioning between the loading part 117 and the partition part 113 more convenient and effectively improving assembly efficiency. It should be noted that in some embodiments, there are two positioning grooves 1131, which are arranged at intervals along the second direction. There are also two positioning protrusions 1173, and each positioning protrusion 1173 corresponds to a positioning groove 1131. Therefore, after the positioning protrusion 1173 extends into the positioning groove 1131, the loading part 117 is unlikely to shift relative to the partition part 113, ensuring the accuracy of the subsequent installation and positioning of the loading part 117.

[0060] Specifically, in some embodiments, the positioning protrusion 1173 passes through the clearance hole 31 and engages with the positioning groove 1131. That is, when the junction box 100 is assembled, the conductive element 30 is located between the partition portion 113 and the loading portion 117 in the direction from the box body 11 to the cover 13. This ensures that part of the conductive element 30 is located in the first cavity 1111 and the other part is located in the second cavity 1115. Furthermore, the positioning protrusion 1173 also facilitates the positioning of the conductive element 30 on the loading portion 117, thereby improving the assembly efficiency of the conductive element 30.

[0061] Please see Figure 4 and Figure 5In some embodiments, the conductive member 30 is provided with a mating part 33; the loading part 117 is provided with a connecting part 1175, which mates with the mating part 33 to connect the conductive member 30 and the loading part 117.

[0062] Specifically, in some embodiments, the mating part 33 can be a through hole, and the connecting part 1175 can be a positioning post. The positioning post mates with the through hole to connect the conductive element 30 and the loading part 117. The mating part 33 and the connecting part 1175 facilitate the connection and positioning between the conductive element 30 and the loading part 117, effectively improving assembly efficiency. Furthermore, the positioned conductive element 30 is less prone to displacement, thus ensuring the stability of the electrical connection between the conductive element 30 and other electrical components (such as busbars and diodes 50), guaranteeing the normal operation of the junction box 100. It should be noted that in some embodiments, the connecting part 1175 and the mating part 33 can be connected by heat fusion to achieve a fixed connection between the conductive element 30 and the loading part 117.

[0063] Please see Figures 4 to 6 In some embodiments, diode 50 includes a tube body 51 and two pins 53, the pins 53 being electrically connected to tube body 51; conductive element 30 includes a body portion 35 and a bent portion 37, the bent portion 37 being bent away from the body portion 35, the bent portion 37 being provided with a slot 371 for holding the pins 53, so that conductive element 30 and diode 50 are electrically connected.

[0064] Specifically, in some embodiments, the body portion 35 includes a first side and a second side facing away from each other in the second direction, and the bending portion 37 bends from the first side and / or the second side of the body portion 35 in a direction away from the body portion 35. The free end of the bending portion 37 is provided with a slot 371, and the pin 53 can be engaged with the slot 371 to achieve an electrical connection between the conductive element 30 and the diode 50. The bending portion 37, on the one hand, allows the conductive element 30 and the pin 53 of the diode 50 to be connected by a snap-fit ​​mechanism (including mechanical and electrical connections), thereby facilitating the installation and removal of the diode 50 and improving assembly efficiency; on the other hand, it increases the heat dissipation area, improves the heat dissipation effect of the diode 50, and reduces the possibility of the diode 50 overheating and being damaged.

[0065] It should be noted that in some embodiments, each conductive element 30 is provided with two bending portions 37, that is, the two bending portions 37 are bent from the first side and the second side of the body portion 35 respectively in a direction away from the body portion 35, and the two bending portions 37 are simultaneously engaged with a pin 53 to realize the electrical connection between the conductive element 30 and the diode 50, thereby improving the stability of the electrical connection between the conductive element 30 and the diode 50.

[0066] Please see Figure 4 and Figure 5 In some embodiments, the conductive element 30 includes a body portion 35, which includes a first sub-part 351 and a second sub-part 353. The first sub-part 351 is disposed in a first cavity 1111, and the second sub-part 353 is disposed in a second cavity 1115. The first sub-part 351 bends and extends from one end of the second sub-part 353 in a direction away from the second sub-part 353, and the free end of the first sub-part 351 is spaced apart from the loading portion 117 of the housing 11. This forms a bent structure in the body portion 35, which, compared to a flat structure, provides a larger heat dissipation area, thereby improving the heat dissipation effect of the junction box 100 and reducing the possibility of overheating damage to the junction box 100.

[0067] Furthermore, in some embodiments, the second sub-part 353 includes a first segment 3531 and a second segment 3533. The first segment 3531 extends from the first sub-part 351 along the direction from the housing 11 to the cover 13, and the second segment 3533 extends from the first segment 3531 in a direction away from the first sub-part 351. Thus, the arrangement of the first segment 3531 causes the main body 35 to form a bent structure, increasing the heat dissipation area and improving the heat dissipation effect of the junction box 100. It is understood that the second segment 3533 is provided with solder pads, and the second segment 3533 is electrically connected to the busbar through the solder pads.

[0068] Please see Figure 3 and Figure 6 In some embodiments, in the direction from the housing 11 to the cover 13 (e.g.) Figure 6 In the vertical direction, the open side 1117 of the second cavity protrudes beyond the open side 1113 of the first cavity. In other words, in the direction from the housing 11 to the cover 13, the size of the peripheral sidewall 115 forming the second cavity 1115 is larger than the size of the peripheral sidewall 115 forming the first cavity 1111. This makes the volume of the second cavity 1115 larger, ensuring that the larger diode 50 can be completely accommodated in the second cavity 1115, improving the sealing protection effect of the junction box 100 on the diode 50. Furthermore, the fact that the open side 1117 of the second cavity protrudes beyond the open side 1113 of the first cavity also facilitates the installation and positioning of the sealing element 70, improving assembly efficiency.

[0069] In addition, compared to the fact that the open side 1117 of the second cavity is flush with the open side 1113 of the first cavity, the open side 1117 of the second cavity protrudes from the open side 1113 of the first cavity, which can make the volume of the first cavity 1111 smaller, thereby reducing the amount of potting compound 20 used in the first cavity 1111, and thus reducing the production cost of the junction box 100 and improving product competitiveness.

[0070] Please see Figure 3In some embodiments, the junction box 100 further includes a cable 90, one end of which passes through the box body 11 and extends into the first cavity 1111 to be electrically connected to one of the two conductive elements 30.

[0071] Specifically, please combine Figure 1 In some embodiments, the two conductive elements 30 include a first conductive element and a second conductive element, and the cable 90 is electrically connected to the first conductive element. When the battery cell 200 connected in parallel with the diode 50 of the junction box 100 is not obstructed, current can flow through the cable 90 to the first conductive element, and then sequentially through the battery cell 200 electrically connected to the first conductive element and the battery cell 200 electrically connected to the second conductive element before flowing to the second conductive element. When the battery cell 200 connected in parallel with the diode 50 of the junction box 100 is obstructed, current can flow through the cable 90 to the first conductive element and directly through the diode 50 to the second conductive element, thereby allowing the current to bypass the obstructed battery cell 200 and preventing overheating and damage to the obstructed battery cell 200.

[0072] It should be noted that in some embodiments, the cable 90 and the housing 11 are separate structures. Specifically, the peripheral sidewall 115 of the housing 11 has a through hole, and a clamping block can be provided in the through hole. The cable 90 is confined in the through hole by the clamping block, and one end of the cable 90 extends into the first cavity 1111 to electrically connect with one of the two conductive components 30. In other embodiments, the cable 90 and the housing 11 are an integral structure. For example, the cable 90 and the housing 11 form an integral injection molded part, and one end of the cable 90 passes through the peripheral sidewall 115 of the housing 11 and extends into the first cavity 1111 to electrically connect with one of the two conductive components 30. This can reduce the number of parts in the junction box 100 and improve the assembly efficiency of the junction box 100.

[0073] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the described embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A junction box, characterized in that, include: The housing includes a box body and a cover body. The box body has a receiving cavity and a partition. The partition body is used to divide the receiving cavity into a first cavity and a second cavity. The first cavity is filled with potting compound. The cover body is placed on the open side of the receiving cavity. Two conductive elements, a portion of which is disposed in the first cavity and the other portion extends through the partition into the second cavity; A diode, wherein the diode is disposed in the second cavity and is electrically connected to both of the conductive elements; and A sealing element is disposed on the open side of the second cavity and is used to seal the gap between the open side of the second cavity and the cover.

2. The junction box according to claim 1, characterized in that, The box body includes a peripheral sidewall and a loading part. The peripheral sidewall is connected to the loading part and together with the partition part, forms the first cavity and the second cavity. The loading part is provided with a through hole, which communicates with the first cavity.

3. The junction box according to claim 2, characterized in that, The conductive component is provided with a clearance hole; one of the loading part and the partition part is provided with a positioning protrusion and the other is provided with a positioning groove. The positioning protrusion passes through the clearance hole and cooperates with the positioning groove to connect the loading part and the partition part.

4. The junction box according to claim 2, characterized in that, The conductive component is provided with a mating part; the loading part is provided with a connecting part, and the connecting part mates with the mating part to connect the conductive component and the loading part.

5. The junction box according to claim 1, characterized in that, The diode includes a tube body and two leads, the leads being electrically connected to the tube body; the conductive element includes a body portion and a bent portion, the bent portion being bent away from the body portion in a direction away from the body portion, the bent portion being provided with a slot, the slot being used to engage the leads, so that the conductive element and the diode are electrically connected.

6. The junction box according to claim 1, characterized in that, The conductive component includes a body portion, which includes a first sub-part and a second sub-part. The first sub-part is disposed in the first cavity, and the second sub-part is disposed in the second cavity. The first sub-part bends and extends from one end of the second sub-part in a direction away from the second sub-part, and the free end of the first sub-part is spaced apart from the loading portion of the box body.

7. The junction box according to claim 1, characterized in that, In the direction from the box body to the cover body, the open side of the second cavity protrudes beyond the open side of the first cavity.

8. The junction box according to claim 1, characterized in that, The second cavity is filled with potting compound.

9. The junction box according to any one of claims 1-8, characterized in that, The junction box also includes: A cable, one end of which passes through the housing and extends into the first cavity to be electrically connected to one of the two conductive elements.

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

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