WO2012013014A1 - Photovoltaic assembly junction box - Google Patents

Abstract

Provided is a photovoltaic assembly junction box, comprising a junction box body (101), a working circuit module, a heat dissipation module (301), and connection modules (401, 402). The working circuit module comprises a working circuit and pins electrically connected to the working circuit. The connection modules (401, 402) each comprise a positive connection device and a negative connection device. The junction box body (101) incorporates an accommodating cavity sealed against fluids from the outside. Two end portions of the junction box body (101) respectively extend downward in the Y-axis direction to form a pair of cable ducts in communication with the accommodating cavity. The junction box body (101) and the cable ducts enclose together a receiving cavity. The heat dissipation module (301) is located outside the working circuit. The heat dissipation module (301) and the working circuit are contained in the receiving cavity. The pins are located in the accommodating cavity. The positive connection device and the negative connection device respectively pass through the corresponding cable ducts and are electrically connected to the corresponding pins in the accommodating cavity.

Description

 Photovoltaic module junction box

 [0001] The present invention relates to a photovoltaic module junction box. Background technique

 [0002] A photovoltaic cell is a device that directly converts solar radiation energy into electrical energy. A photovoltaic component is a product that is connected and packaged by a plurality of photovoltaic cells, and is a basic unit of a battery array in a photovoltaic power generation system. The PV module junction box is the key connection device for the solar module system. The purpose of the junction box is to prevent the hot spot effect when the solar module is blocked. If the junction box is damaged or the connection is not broken, the junction box will not work properly, so

 Say

When the solar module is partially blocked, the entire solar module system can't stop working, and the blocked part will emit a large amount of heat, which will seriously burn out the components. At present, the working circuit of the PV module junction box is placed in the sealed junction box. When the PV module junction box is in operation, the bypass diode will generate a higher temperature (up to 200 degrees), so that the air inside the sealed box is sharp. The expansion, so that the dense book sealing performance is invalid, the plastic casing can not withstand high temperature and high pressure, resulting in deformation and burning. On the other hand, with the development of science and technology, the conversion efficiency of photovoltaic cells is increasing day by day, the power of photovoltaic cells is getting larger and larger, and the demand for high-power photovoltaic module junction boxes is tight, and the above junction boxes are due to the above structural reasons. The power of the PV module junction box cannot be increased, causing a technical bottleneck. Utility model content

 [0003] In order to overcome the above disadvantages, the utility model aims to provide a photovoltaic module junction box with a reasonable structure.

[0004] In order to achieve the above object, the technical solution adopted by the utility model is: a photovoltaic module junction box, comprising a junction box body, a working circuit module, a heat dissipation module, and a connection module, wherein the working circuit module includes a working circuit and a device The working circuit electrically connects the pin, the connecting module comprises a positive connecting device and a negative connecting device, the junction box body has a receiving cavity sealed with the outside air, and the two ends of the connecting box body a portion of the cable duct that extends downwardly along the axis of the yoke to form a pair of cable passages that communicate with the accommodating cavity, wherein the junction box body and the cable 3b are collectively surrounded to form a receiving cavity, and the heat dissipation The module is located outside the working circuit, the heat dissipation module and the working circuit are received in the receiving cavity, the pin is located inside the receiving cavity, and the positive connecting device is The negative connection device is electrically connected to the corresponding pin inside the accommodating cavity through the corresponding cable channel.

 [0005] Preferably, the positive electrode connecting device includes a cable and a positive electrode connecting mechanism at one end of the cable, and the negative electrode connecting device includes a cable and a negative electrode connecting mechanism at one end of the cable. The other ends of the cable of the terminal connection device and the negative electrode connection device are respectively passed through the corresponding cable passages into the cavity of the capacitor and the corresponding pins are electrically connected.

 [0006] Preferably, the working circuit module includes a substrate, a working circuit fixedly disposed on the substrate, and a pin electrically connected to the working circuit, the substrate and the working circuit The outer sleeve is provided with a heat dissipation module, and the pin protrudes into the accommodating cavity through a pin hole on the terminal box body.

More preferably, the junction box body is made of a plastic material, and the heat dissipation module is made of a metal material. Instruction manual

 [0008] Preferably, the heat dissipating module is formed with heat dissipating fins on at least part of its surface.

 [0009] Since the above technical solution is adopted, it is not difficult to see that the photovoltaic module junction box of the utility model has the advantages of reasonable layout and compact structure compared with the conventional junction box. DRAWINGS

 1 is a schematic diagram of a vertical stand of an embodiment of a photovoltaic module junction box of the present invention;

 [001 1] FIG. 1 is a schematic exploded view (front side) of a photovoltaic module junction box embodiment of a wood utility model;

 [001 2] FIG. 3 is a perspective view (reverse view) of a three-dimensional splitting of an embodiment of a photovoltaic module junction box of the present invention.

 [0013] wherein: 101, junction box body; 102, accommodating cavity; 103a, cable channel; 103b, cable channel; 104a, block channel; 104b, block channel; 105a, fastening channel; 105b, tight 106, sealing block; 106a, sealing channel; 107, sealing ring; 108, K block; 109, connecting piece; 110, pin hole; 111, cover; 112, seal; 113, protrusion; 201, Τ. for circuit module; 202, substrate; 203, Τ. for circuit; 204, pin: 205, embossing; 301, heat dissipation module; 302, heat dissipation fin: 303, F1 slot; 401, positive connection device 402, negative connection device; 403, cable; 404, cable; 405, positive connection mechanism; 406, negative connection mechanism. detailed description

 [0014] The preferred embodiments of the wood utility model are described in detail below with reference to the accompanying drawings, so that the advantages and features of the wood utility model can be more easily understood by those skilled in the art, thereby making the scope of protection of the present invention more For a clear and definitive definition.

 [001 5] Referring to FIG. 1 to FIG. 3, the photovoltaic module junction box in this embodiment includes a junction box body 101, a working circuit module 201, a heat dissipation module 301, and connection modules 401, 402. The junction box body 101 may be made of a plastic material. In one molding, the heat dissipation module 301 can be made of a metal material.

 [0016] As shown in FIG. 2 and FIG. 3, the junction box body 101 includes a side wall extending in the direction of the x-axis and closed around the x-axis, the bottom end of the side wall extending in a meandering plane to form a flange, a flange The top surface of the side wall is covered with a cover body 111, and a sealing member 112 is disposed between the top end of the side wall and the cover body 111 to form a receiving cavity i02 sealed with the outside world. In other embodiments of the present invention, the flange may also cover the entire bottom surface to form a space of the mouth opening, and the junction box body formed by covering the space through the cover 111

101 can be used not only to affix the surface to the surface of the photovoltaic module.

[001 7] The junction box body 101 has a pair of cable passages U 3a, 103b that are electrically connected to the receiving cavity 102. In a preferred embodiment of the present invention, the two ends of the junction box body 101 respectively extend downward in the Y-axis direction to form a pair of cable passages 103a, 103b, so that a part of the side wall of the junction box body 101, the cable passage 103a, The side wall of the 103b is surrounded by a receiving cavity that surrounds the opening toward the Y-axis; the cable passages 103a, 103b are formed with a filling passage 104a along the Z-axis direction, 04b, and the filling channel 104a, 104b connects the cable The passages 103a, 103b are partitioned, and the seal block 106 has a sealed passage 106a therein. When the seal block 106 is inserted into the block passages 104a, 104b in the Z-axis direction, the cable passages 103a, 103b can be connected, and the sealed passage 106a is provided. Sealing ring 107, thereby ensuring the sealing performance of the accommodating cavity 102, it can be seen that this arrangement is actually a preferred method, because if only the sealing mechanism is installed in the cable passages 103a, 103b, it is in production. In the process of processing, it will be very difficult to operate, and the utility model only needs to install the sealing ring 107 in the sealing block 106 and fill the filling block passages 104a, 104b, so that Instruction manual

 The seal block 106 is also automatically tightened after the cable is sequentially passed through the corresponding cable passages 103a, 103b and the seal passage 106a.

 [0018] The cable passages 103a, 103b are also formed with fastening passages 105a, 105b along the Z-axis direction, the fastening passages 105a, 105b respectively penetrating the corresponding cable passages 103a, 103b, fastening the passage 105a, A pressing block 108 is installed in the 105b, and the cross section of the pressing block 108 is adapted to the cross section of the fastening passages 105a, 105b. As a preferred embodiment, a polygonal cross section (for example, a pentagon, a hexagon, etc.) can be used. When the cable is located in the cable passages 103a, 103b, one side of the polygonal block 108 having a polygonal cross section presses the outer skin of the cable at the intersecting position, thereby functioning as a fixed cable; The solution forms at least one groove extending along the Z-axis on the outer wall of the pressing block 108 against the cable sheath. Therefore, when the pressing block 108 presses the outer skin of the cable, part of the outer skin of the cable sinks into the groove. Internal (() enhances the effect of the stop.

 [0019] The working circuit module 201 includes a substrate 202, a working circuit 203 fixedly disposed on the substrate 202h, and a pin 204 electrically connected to the working circuit 203. The substrate 202 has a flat shape; the heat dissipating module 301 has a U-shaped cross section and thus has a cross section The inner cavity of the substrate 202 is provided with heat dissipating fins 302 on at least part of the upper surface thereof to enhance the heat dissipation effect; the length of the heat dissipation module 301 in the X-axis direction is slightly longer than the substrate 202, and the substrate 202 and the heat dissipation module 301 are disposed. There is a guiding mechanism along the X-axis direction, and the upper surface of the substrate 202 is formed with a protrusion 205 extending in the X-axis direction. The heat dissipation module 301 has a groove 303 corresponding to the position of the protrusion 205, and the guiding mechanism converts the substrate 202. Guided to the inner cavity of the heat dissipation module 301 along the X-axis direction; a guiding mechanism along the Y-axis direction is disposed between the junction box Benxi 101 and the heat dissipation module 301, and the guiding mechanism collectively drives the substrate 202 and the heat dissipation module 301 along the Y-axis direction The opening formed by the side wall of the junction box body 101 and the side walls of the cable passages 103a, 103b is guided to slide toward the Y-axis. In the embodiment, the guiding mechanism is specifically a protrusion 1 13 on both sides of the heat dissipation module 301. The protrusion 113 is accommodated in the process of sliding the heat dissipation module 301 into the receiving cavity along the Y-axis direction. The space of the heat dissipation module 301 is in the space on both sides of the substrate 202, and the pin 204 extends through the pin hole 110 of the junction box body 101 into the accommodating cavity 102, between the pin 204 and the pin hole 110. A seal 207 is provided. It can be seen by those skilled in the art that the working circuit 203 on the substrate 202 is housed in the inner cavity of the heat dissipation module 301 in this process, and the pin 204 is located in the sealed receiving cavity 102, thus The heat-dissipating working circuit 203 has a significant heat dissipation effect in the air.

[0020] The connection module includes a positive connection device 401 and a negative connection device 402. The positive connection device 401 includes a cable 403 and a positive connection mechanism 405 at one end of the cable 403. The negative connection device 402 includes a cable 404 and is located at the cable 404. The anode connection mechanism 406, the anode connection mechanism 405, and the cathode connection mechanism 406 are respectively used to interconnect with the corresponding connection mechanism of the photovoltaic module or the photovoltaic module junction box thereof; the positive connection device 401 and the cable 403 of the negative connection device 402 The other end of the 404 passes through the corresponding cable channel 103a, 103b, and then seals the channel 106a, and extends into the accommodating cavity 102 and is electrically connected to the corresponding pin 204. In this embodiment, the connection process is passed. The connecting piece 109 is realized, one end of the connecting piece 109 is soldered and fixed to the core of the cables 403, 40, and the other end is inserted and inserted into the groove on the pin 204, thereby providing a convenient assembly method. On the other hand, after the connecting piece 109 is fixed and fixed, the positions of the working circuit module 201 and the heat dissipating module 301 are also fixed. Therefore, the movement of the working circuit module 201 and the heat dissipation module 301 in the Y-axis direction is prevented.

 The above embodiments are merely illustrative of the technical concept and the features of the present invention. The purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention. Equivalent changes or modifications made in accordance with the spirit of the invention are intended to be included within the scope of the invention.

Claims

Claim A photovoltaic module junction box, comprising a junction box body (101), a circuit module (201), a heat dissipation module (301), and a connection module (401 402), wherein the working circuit module (201) includes a work a circuit (203) and a pin (204) electrically connected to the working circuit (203), the connecting module (101) comprising a positive connecting device (401) and a negative connecting device (402), wherein: The junction box body (101) has a receiving cavity (102) that is hermetically sealed with the outside, and the two ends of the junction box body (101) respectively extend downward along the z-axis direction to form a pair and the The accommodating cavity (102) is electrically connected to the cable channel (103a 103b), the junction box of the junction box (101), and the cable channel (103a 103b) together to form a receiving cavity, and the heat dissipation The module (301) is external to the working circuit (203), and the driving circuit (203) of the heat dissipation module (301) is received in the receiving cavity, the pin ( 204) located inside the accommodating cavity (102), the ιΗ pole connecting device (401) and the negative electrode The interior of the corresponding pin (204) is electrically connected to said receiving chamber (102) connected to means M02), respectively, through the corresponding cable channel (103a 103b).  2 . The photovoltaic module junction box according to claim 1 , wherein: the positive electrode connecting device ( 401 ) comprises a cable ( 403 ) and a positive connection at one end of the cable ( 403 ) The mechanism (405), the negative connection device (402) includes a cable (404) and a negative connection mechanism (406) at the end of the cable (404), the positive connection device (401), the negative electrode The other end of the cable (403 404) of the connecting device (402) extends through the corresponding cable channel (103a 103b) into the receiving cavity (102) and is electrically connected to the corresponding pin (204). connection.  3. A photovoltaic module junction box according to claim 1, characterized in that: said working circuit module (201) comprises a 3⁄4 plate (202) fixedly disposed on said 3⁄4 plate (202) a circuit (203), a pin (204) electrically connected to the circuit (203), and a heat dissipation module disposed on the substrate (202) and the working circuit (203) (301), the pin (204) extends through the pin hole (110) of the junction box body (101) I: into the accommodating cavity (102).  The photovoltaic module junction box according to any one of claims 1 to 3, wherein: the junction box body (101) is made of a plastic material, and the heat dissipation module (301) is made of a metal material. production.  The photovoltaic module junction box according to claim 4, wherein: the heat dissipation module (301) is formed with heat dissipation fins (302) on at least part of the surface thereof.