WO2012013013A1

WO2012013013A1 - Photovoltaic array junction box

Info

Publication number: WO2012013013A1
Application number: PCT/CN2011/001133
Authority: WO
Inventors: 陈新初
Original assignee: Chen Xinchu
Priority date: 2010-07-30
Filing date: 2011-07-08
Publication date: 2012-02-02
Also published as: CN101976970A; CN101976970B

Abstract

A photovoltaic array junction box comprising: a junction box body (101), a service circuit module (201), a heat-dispersing module (301), and two connection modules (401, 402). The junction box has a holding cavity (102) that is sealed air-tight. The service circuit module comprises a service circuit (203) and connected thereon several pins (204). The service circuit is arranged on the exterior of the holding cavity; the pins are arranged in the interior of the holding cavity; the heat-dispersing module is arranged on the exterior of the service circuit. The connection modules comprise a cathode connecting device (401) and an anode connecting device (402), both are respectively connected to the corresponding pins within the holding cavity. The photovoltaic array junction box has improved cooling capacity, thereby solving prior art problems of hermetic sealing and increasing power.

Description

Photovoltaic module junction box

Technical field

[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 function of the junction box is to prevent the hot spot effect when the solar module is partially blocked. If the junction box is damaged or the connection is not secure, the junction box will not work properly. When the solar module is partially blocked, the entire solar module system will not work normally. The blocked part will emit a lot of heat and will burn out badly. Component. At present, the working circuit path 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), thereby making the sealed box body The air expands rapidly, resulting in failure of the sealing performance, and the plastic casing is deformed and burned due to the high temperature and high pressure. 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 more and more people, and the demand for photovoltaic modules of human power is urgent. The above junction boxes make existing photovoltaics due to the above structural reasons. The power of the component junction box cannot be increased, causing a technical bottleneck. Summary of the invention

[0003] In order to overcome the above disadvantages, the object of the invention is to provide a photovoltaic module junction box with better heat dissipation performance.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: a photovoltaic module junction box, which comprises a junction box body, a working circuit module, a heat dissipation module and a connection module, wherein the junction box body has a receiving cavity, The accommodating cavity is sealed with the outside air, the working circuit module includes a working circuit and a plurality of pins electrically connected to the working circuit, and the working circuit is disposed outside the accommodating cavity, The pin is disposed inside the accommodating cavity, the heat dissipating module is disposed outside the working circuit, and the connecting module comprises a positive connecting device and a negative connecting device, and the positive connecting device The negative connection device is electrically connected to the corresponding pin inside the accommodating cavity.

[0005] Preferably, the junction box body comprises a side wall extending in a direction of a yoke and closed around a yoke, the bottom end of the side wall extending in a meandering plane to form a flange, the flange passing through the sealant Attached to the surface of the photovoltaic module, the top end of the side 3⁄4 is covered with a cover, and the top end of the side wall and the cover are provided with a sealing member.

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

More preferably, a seal is disposed between the pin and the pin hole.

[0008] More preferably, a mechanism along the X-axis direction is disposed between the substrate and the heat dissipation module, and the junction box body and the heat dissipation module are disposed along a direction of a x-axis Guiding mechanism.

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

[0010] More preferably, the heat dissipating module is formed with heat dissipating fins on at least part of its surface. Instruction manual

[001 1] Preferably, the junction box body has a pair of cable passages communicating with the accommodating cavity, the positive connection device comprising a cable and a positive connection at one end of the cable The negative connection device includes a cable and a negative connection mechanism at one end of the cable, and the other ends of the cables of the positive connection device and the negative connection device respectively extend through corresponding cable channels. And into the accommodating cavity and electrically connected to corresponding pins.

[0012] Preferably, a sealing mechanism is disposed in the cable passage.

[0013] Preferably, the cable channel is formed with a filling channel, and the sealing channel is provided with a sealing filling, wherein the sealing block has a sealed channel inside, and the sealing channel is provided with a sealing channel The sealing ring, the other end of the cable of the positive connecting device and the negative connecting device respectively passes through the corresponding cable channel and the sealing channel, and then extends into the receiving cavity and the corresponding pins are electrically connected. .

[0014] By adopting the above technical solution, it is not difficult to see that the photovoltaic module junction box of the present invention has a heat dissipation module which is disposed directly on the outside and is provided with an accelerated heat dissipation module, compared to the conventional junction box. The heat dissipation capability of the junction box of the photovoltaic module is strengthened, thereby not only solving the sealing problem in the prior art, but also solving the technical problem that the power cannot be increased. DRAWINGS

1 is a perspective view of an embodiment of a photovoltaic module junction box of the present invention;

2 is a schematic diagram of a standing break (front side) of an embodiment of a photovoltaic module junction box of the present invention;

3 is a perspective view (reverse view) of a three-dimensional splitting of the embodiment of the photovoltaic module junction box of the invention.

[0018] 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 Solid channel; 106, sealed block; 106a, sealed channel;

107, sealing ring; 108, briquetting; 109, connecting piece; 110, pin hole; 111, cover; 112, sealing member; 113, convex _; 20K

作. for circuit module; 202, substrate: 203, Τ-made circuit; 204, pin; 205, bump; 301, heat dissipation module; 302, heat sink fin; 303, groove; 401, positive connection device; , negative connection device; 403, cable; 404, cable; 405, positive connection mechanism; 406, negative connection mechanism. detailed description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to make the advantages and features of the present invention more readily understood by those skilled in the art, so that the scope of the present invention is more clearly and clearly defined. .

[0020] 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 can be made of plastic material once. Forming, the heat dissipation module 301 can be made of a metal material.

[0021] 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, convex The edge is attached to the surface of the photovoltaic module by a sealant. The top end of the side wall is covered with a cover body 1 1 , and a sealing member 1 12 is disposed between the top end of the side wall and the cover body 1 1 1 to form a gas-liquid phase with the outside. The sealed accommodating cavity 102, in other embodiments of the present invention, the flange may cover the entire bottom surface to form an opening-up space, and the junction box body 101 formed by covering the space through the cover 111 may not be limited to the sticker. How to use the surface of the PV module.

[0022] The junction box body 101 has a pair of cable passages 103a, i03b that are electrically connected to the accommodating cavity 102. In a preferred embodiment of the present invention, both ends of the junction box body 101 respectively extend downward in the Y-axis direction to form a pair of cable passages 103a. Instruction manual

103b, such that a part of the side wall of the junction box body 101, the side walls of the cable passages 103a, 103b collectively surround the receiving cavity forming the opening in the opposite direction of the Y-axis; the cable passage 10, 3⁄4, 10, % path along the Z-axis direction Blocking passages 104a, 104b are formed, which block the cable passages 103a, 103b. The sealing block 106 has a sealed passage 106a inside. When the sealing block 106 is embedded in the block passage 104a along the Z-axis direction, 104b can connect the cable passages 103a, 103b, and the sealing passage 106a is provided with a sealing ring 107, thereby ensuring the sealing performance of the accommodating cavity 102. It can be seen that this arrangement is actually a better way, because if It is only used in the manner in which the sealing mechanism is installed in the cable passages 103a, 103b, which will be very difficult to handle during the production process, and the wood invention only needs to be installed in the sealing block 106 to fill the block passage after the sealing ring 107 is installed. 104a, 104b may be so that the sealing block 106 is also automatically tightened after the cable is sequentially passed through the corresponding cable passages 103a, 103b to seal the passage 106a.

[0023] The cable passages 103a, 103b are also formed with fastening passages 105a, 105b along the Z-axis direction. The fastening passages 105a, 105b respectively penetrate the corresponding cable passages 103a, 103b, and fasten 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 tight|*|channels 105a, 105b. As a preferred solution, a polygonal cross section (for example, a pentagon, a hexagon, etc.) may be employed. 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; More preferably, at least one groove extending along the Z axis is formed on the outer wall of the pressing block 108 against the cable sheath, so that when the pressing block 108 presses the outer skin of the cable, a part of the outer skin of the cable is trapped therein. The inside of the groove enhances the effect of the stop.

[0024] The working circuit module 201 includes a substrate 202, a working circuit 203 fixedly disposed on the substrate 202, 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 receiving substrate 202 has at least part of its surface formed with heat dissipating fins 302 to enhance the heat dissipation effect; the length of the heat dissipating module 301 in the X-axis direction is slightly longer than the substrate 202, and between the substrate 202 and the heat dissipating module 301 Provided with an orientation mechanism along the X-axis direction, the upper surface of the substrate 202 is formed with a protrusion 205 extending in the X-axis direction, and the heat dissipation module 301 has a groove 303 corresponding to the position of the protrusion 205, and the guiding mechanism will The substrate 202 is slid into 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 body 101 and the heat dissipation module 301, and the guiding mechanism commons the substrate 202 and the heat dissipation module 301 The Y-axis direction guides the housing into the above-mentioned side wall of the junction box body 101, and the side walls of the cable passages 103a, 103b are integrally surrounded by the opening toward the Y-axis. In the embodiment, the guiding mechanism is specifically a protrusion 113 on both sides of the heat dissipation module 301. The protrusion U3 is received in the heat dissipation module 301 during the process of sliding the heat dissipation module 301 into the receiving cavity along the axial direction. In the space on both sides of the substrate 202 in the cavity, the pin 204 is inserted into the accommodating cavity 102 through the pin hole 110 on the junction box body 101, and a sealing member 207 is disposed between the pin 204 and the pin hole 110. . It can be seen by those skilled in the art that the clamping circuit 203 on the substrate 202 is in the inner cavity of the ten heat dissipating module 301 in this process, and the ^ pin 204 is in the ten-sealed receiving cavity 102. Therefore, the heat dissipation effect of the working circuit 203 having a large heat generation is remarkable in the air.

[0025] 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. The negative connection mechanism 406 of the 404-end, the positive connection mechanism 405 and the negative connection mechanism 406 are respectively used to interconnect with the corresponding connection mechanism of the photovoltaic module or other photovoltaic module junction box; the cable 403 of the positive connection device 401 and the negative connection device 402 The other end of the 404 passes through the corresponding cable passages 103a, 103b and the sealing passage 106a, respectively, and extends into the accommodating cavity 102 and is electrically connected to the corresponding pin 204. In this embodiment, the connection process It is realized by the connecting piece 109, one end of the connecting piece 109 is welded and fixed to the core wire of the cables 403, 404, and the other end is inserted and connected to Description

It is located in the recess 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, thereby preventing the work. The movement of the circuit module 201 and the heat dissipation module 301 in the Y-axis direction.

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 understand the contents of the present invention and to implement the present invention, and the scope of the present invention is not limited thereto. Equivalent changes or modifications made to the spirit of the invention are intended to be included within the scope of the invention.

Claims

Claim

A photovoltaic module junction box, characterized in that it comprises:

a junction box body (101), the junction box body (101) has a receiving cavity (102), and the receiving cavity (102) is gas-liquid sealed with an outer boundary;

a working circuit module (201), the working circuit module (201) comprising a working circuit (203) and a plurality of pins (204) electrically connected to the working circuit (203), the working circuit ( 203) disposed in the accommodating cavity

The outer side of (102), the pin (204) is disposed inside the accommodating cavity (102);

a heat dissipation module (301), the heat dissipation module (301) is disposed outside the working circuit (203); the connection module (401, 402), the connection module (101) includes a terminal connection device ( 401) Negative connection device

(402), the drain connection device (401) and the negative electrode connection device (402) are electrically connected to corresponding pins (2 (H)) inside the accommodating cavity (102).

2. The photovoltaic module junction box according to claim 1, wherein said junction box body (101) comprises a side wall extending in the Z-axis direction and closed around the Z-axis, the bottom end of the side wall being at XY Extending in a plane to form a flange, the flange is attached to the surface of the photovoltaic module by a sealant, the top end of the side wall is covered with a cover body (111), and the top end of the side wall and the cover body (111) A seal (112) is provided between the two.

The photovoltaic module junction box according to claim 1, wherein the working circuit module (201) comprises a substrate (202), and a working circuit (203) fixedly disposed on the substrate (202) a pin (204) electrically connected to the working circuit (203), a heat dissipating module (301) disposed on the outer surface of the substrate (202) and the working circuit (203), and the lead The foot (204) passes through the pin hole (1 10) in the junction box body (101) and enters the accommodating cavity (102).

4. The photovoltaic module junction box of claim 3, wherein a seal (207) is disposed between the pin (204) and the pin hole (110).

The photovoltaic module junction box according to claim 3, wherein a guiding mechanism (205, 303) along the X-axis direction is disposed between the substrate (202) and the heat dissipation module (301). A guiding mechanism (113) along the Y-axis direction is disposed between the junction box body (101) and the heat dissipation module (301).

6. The photovoltaic module junction box according to claim 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.

7. The photovoltaic module junction box according to claim 6, wherein the heat dissipation module (301) is formed with heat dissipating fins (302) on at least part of its surface.

8. The photovoltaic module junction box according to claim 1, wherein the junction box body (101) has a pair of cable passages that are electrically connected to the accommodating cavity (102). 103a, 103b), the pole connecting device (401) comprises a cable (403) and a positive connecting mechanism (405) at one end of the cable (403), the negative connecting device (402) comprising a cable (M) and a negative connection mechanism (406) at the end of the cable 1 (H), a cable (403, 404) of the positive connection device (401) and the negative connection device (402) The other end extends through the corresponding cable channel (103a, 103b) into the receiving cavity (102) and is electrically connected to the corresponding pin (204).

The photovoltaic module junction box according to claim 8, wherein a sealing mechanism is disposed in the cable passage (103a, 103b).

10. The photovoltaic module junction box according to claim 9, wherein the cable passages (103a, 103b) are formed with block passages (104a, 104b), and the block passages (104a, 104b) A sealing block (106) is disposed therein, the sealing block (106) has a sealing passage (106a) inside, and the sealing channel (106a) is provided with a sealing Claim

The other end of the cable (403, 404) of the positive electrode connecting device (401) and the negative electrode connecting device (402) passes through the corresponding cable channel (103a, 103h) and the sealed channel (106a). After that, it protrudes into the accommodating cavity (102) and is electrically connected to the corresponding pin (204).