CN219304792U - High-power intelligent photovoltaic junction box and wiring terminal thereof - Google Patents

Abstract

The utility model provides a high-power intelligent photovoltaic junction box and a junction terminal thereof, wherein the junction terminal comprises: the terminal seat and fix the conducting strip on the terminal seat, offer the perforation that is used for connecting the busbar on the conducting strip, connect in series the diode between two adjacent conducting strips, offered the connection through-hole on the terminal seat, the connection through-hole just right the diode. The connecting through holes are formed in the terminal seat of the connecting terminal, so that the conductive sheet and the diode are prevented from being completely exposed, the sealing performance is improved, air circulation can be formed by the connecting through holes when pouring the pouring sealant, the curing of the pouring sealant is facilitated, and the reliability of the assembly is improved. This high-power intelligent photovoltaic terminal box adopts the box body of a plurality of separation settings and adopts the inside busbar series connection of subassembly, and the at utmost uses the busbar to replace the cable, has effectively reduced the cost, has improved power supply efficiency.

Description

High-power intelligent photovoltaic junction box and wiring terminal thereof

Technical Field

The utility model belongs to the technical field of photovoltaic power generation, and particularly relates to a high-power intelligent photovoltaic junction box and a junction terminal thereof.

Background

The photovoltaic junction box is a very key part in a photovoltaic module, is an electric connection part for connecting a battery array in one solar photovoltaic module with electric equipment or a battery array in another solar photovoltaic module, has the function of conducting current and voltage generated by the whole row of batteries in the solar photovoltaic module to an external channel, is an important part for connecting a battery plate of the photovoltaic module with an inverter in a solar power generation system, and is a cross-field comprehensive design combining a solar collector design, a mechanical design and material science. The photovoltaic junction box is very important in the composition of the solar module, and the junction box is adhered to the back plate of the module through silica gel, so that the photovoltaic junction box has the main effects of connecting the power generated by the solar cell with an external circuit, leading out the current in the module and realizing power output.

The bottom of current terminal box is in order to be convenient at connecting terminal and draw forth the busbar junction fretwork completely, exposes connecting terminal completely, forms airtight environment after pouring the pouring sealant, and the pouring sealant is difficult to solidify under sealed environment, and the pouring sealant does not solidify and leads to the subassembly reliability to reduce, has certain security risk.

The photovoltaic terminal box mainly includes terminal box bottom, the terminal box lid, binding post, the diode, the wire, the line ball connects, connecting terminal etc. because welded busbar lead-out wire is less with terminal box metal part contact surface, the terminal box condition of generating heat can be more obvious under high voltage, terminal box burning risk is great, and diode overall arrangement in the terminal box at present is unfavorable for the heat dissipation, because diode breakdown has appeared in the power station end, the phenomenon that leads to the subassembly to burn out under the high temperature condition, the trisomy terminal box on the market all is narrower in addition, can form the condition that creepage distance is insufficient, lead to the terminal box to use for a long time easily and take place the condition of spontaneous combustion.

With the continuous development of photovoltaic technology, solar cell products as semiconductor devices for converting solar energy into electric energy have been rapidly developed. Because only one junction box is arranged on one solar panel in the prior art, the same junction box is connected with two outgoing lines of the anode and the cathode, and a plurality of junction boxes are connected in series through the outer lead to form a solar cell array by the plurality of solar panels, the cost of the cable is very high, the loss of power in the current transmission process is very high, and the defects of overhigh cost and low power supply efficiency of the solar photovoltaic module are caused.

Disclosure of Invention

The utility model aims to provide a high-power intelligent photovoltaic junction box and a wiring terminal thereof, and aims to solve the problem that a diode of the existing photovoltaic junction box is easy to break down due to heating and a component burnout phenomenon occurs under a high-temperature condition.

In order to solve the technical problems, the utility model is realized in such a way that a high-power intelligent photovoltaic junction box comprises: the terminal seat and fix the conducting strip on the terminal seat, offer the perforation that is used for connecting the busbar on the conducting strip, connect in series the diode between two adjacent conducting strips, offered the connection through-hole on the terminal seat, the connection through-hole just right the diode.

Further, the diode is a module diode and comprises a diode chip and an insulator coated on the outer side of the diode chip, wherein two ends of the insulator are respectively provided with a connecting radiator extending towards the direction of the conducting strip, and the connecting radiator is fixedly connected with the conducting strip.

Further, the module diode is fixedly connected with the conducting strip in a pressing mode.

Further, the through holes on the conducting plates are arranged on one side close to the diodes, and the connecting heat radiation bodies are arranged at two ends of the through holes.

Further, a bonding pad is arranged on the conductive sheet. Can wrap up the welding position of busbar effectively, promote the welding quality of busbar and pad, avoid the rosin joint, and then improve photovoltaic module's stability and life-span, solved the problem of original terminal box busbar rosin joint.

Further, the wire pressing connector is connected with a conductive sheet and is provided with a groove for fixing an output wire.

Further, the terminal seat is provided with a fixed column, the conducting strip is fixed at the upper end of the fixed column, the upper side of the terminal seat is also provided with a first supporting seat and a second supporting seat, the first supporting seat is located at the lower side of the conducting strip, and the second supporting seat is located at the lower side of the diode.

Further, two adjacent conductive sheets are arranged in parallel.

A high power intelligent photovoltaic junction box comprising: the photovoltaic module comprises an anode junction box, a cathode junction box and a plurality of middle junction boxes, wherein the anode junction box, the cathode junction box and the middle junction boxes comprise a box body and the wiring terminals, the wiring terminals are arranged in the box body, and the anode junction box, the cathode junction box and the middle junction boxes are welded with bus bars of the photovoltaic module through the wiring terminals respectively and form series connection.

The utility model provides a high-power intelligent photovoltaic terminal box is an electrical connection part that connects the battery array in a solar energy photovoltaic module and consumer or battery array in another solar energy photovoltaic module, and its concrete principle is: when the sunlight is sufficient, the channel for conducting the current and the voltage generated by the battery array in the solar photovoltaic module to the outside is an important component for connecting the battery panel of the photovoltaic module and the inverter in the solar power generation system, and is suitable for generating power by the photovoltaic solar module.

The high-power intelligent photovoltaic junction box adopts the box bodies which are arranged in a separated mode and adopts the bus bars inside the assemblies to be connected in series, so that the bus bars are used for replacing cables to the greatest extent, the cost is effectively reduced, the power supply efficiency is improved, the problem that the cables of the original junction box are used more and wasted is solved, and the high-power intelligent photovoltaic junction box has a wide application prospect.

Further, the box body comprises a box bottom and a box cover, a box wall extending upwards is arranged around the box bottom, the box cover is fixed at the upper end of the box wall, an opening in the middle of the box bottom is formed, and the terminal seat is fixed at the opening of the box bottom.

Further, the box body of the positive electrode junction box and the box body of the negative electrode junction box are further provided with a wire through hole for fixing the output wire, the lower side of the wire through hole is provided with a wire fixing piece, and the wire fixing piece is fixedly clamped with the box body.

Compared with the prior art, the high-power intelligent photovoltaic junction box and the junction terminal thereof have the beneficial effects that:

the connecting through holes are formed in the terminal seat of the connecting terminal, so that the conductive sheet and the diode are prevented from being completely exposed, the sealing performance is improved, air circulation can be formed by the connecting through holes when pouring the pouring sealant, the curing of the pouring sealant is facilitated, and the reliability of the assembly is improved.

The connecting terminal utilizes the diode to connect the conducting strip to extend to outside with the insulator both ends of parcel in the diode outside, form and connect the radiator, connect the radiator and can in time derive the heat that the diode produced, reduced the temperature of diode node, improved the operational environment of diode, thereby make the life extension of diode, reduced the possibility that this photovoltaic solar module and terminal box damaged, original terminal box diode life is short has been solved, the extremely fragile defect, connect the radiator and connect the conducting strip moreover, the joint strength between the conducting strip has been strengthened, the assembly of terminal box has been made things convenient for simultaneously.

Drawings

FIG. 1 is a perspective view of a terminal block of a high power intelligent photovoltaic junction box in an embodiment of the present utility model;

FIG. 2 is an exploded view of the terminal block of the high power intelligent photovoltaic junction box in an embodiment of the present utility model;

FIG. 3 is a top view of a terminal block of a high power intelligent photovoltaic junction box in an embodiment of the present utility model;

FIG. 4 is a cross-sectional view at A-A in FIG. 3;

FIG. 5 is a perspective view of a high power intelligent photovoltaic junction box in an embodiment of the present utility model;

fig. 6 is a bottom perspective view of a negative terminal box in an embodiment of the utility model;

fig. 7 is an exploded view of a negative electrode junction box in an embodiment of the present utility model;

fig. 8 is a cross-sectional view of a negative electrode junction box in an embodiment of the utility model.

In the drawings, each reference numeral denotes:

1. terminal block 2, conducting strip 3, bonding pad 4, fixed column 5, perforation 6, diode 7, connection radiator 8, line ball joint 9, connection through-hole 10, first supporting seat 11, second supporting seat 12, output line diode 13, anodal terminal box 14, negative pole terminal box 15, intermediate terminal box 16, wire rod mounting 17, box bottom 18, box wall 19, lid 20, through-wire hole 601, diode chip 602, insulator.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Example 1:

referring to fig. 1 to 2, in the present embodiment, a connection terminal of a high-power intelligent photovoltaic junction box includes: the terminal seat 1 and the conducting strip 2 fixed on the terminal seat 1, the conducting strip 2 is provided with a through hole 5 for connecting a bus bar, and a diode 6 is connected in series between two adjacent conducting strips 2. The diode 6 is connected in series between the two adjacent conducting strips 2, so that the safety performance of the junction box is greatly improved, the minimum outline size of the junction box is achieved, meanwhile, the junction box can be suitable for different voltages, the purposes of electric gap and creepage distance safety regulation requirements can also be achieved, the problem that the existing junction box is poor in heat dissipation is solved, the volume of the junction box is not increased, the cost of the junction box is reduced, and the reliability of the junction box in use is improved.

The diode 6 is the module diode in this application, does not need the welding, has solved the welding seal around the needs of original diode 6, and the poor problem of thermal diffusivity, and the module diode need not weld, and direct crimping is rationally distributed, and two sides are penetrating, and two sides radiating position can dispel the heat through the louvre of terminal box, does benefit to the ventilation heat dissipation of diode 6, prevents that diode 6 from high temperature breakdown from burning out, has solved the poor defect of original terminal box thermal diffusivity.

Adjacent two conductive plates 2 are arranged in parallel. The perforation 5 is arranged on one side of the conducting strip 2 close to the diode 6, and the connecting heat radiator is arranged at two ends of the perforation 5. The leading-out bus bar of the photovoltaic large component is welded on one end of the conducting plate 2 through the through hole 5, and the output line is welded on the other end of the conducting plate 2.

The existing junction box is generally formed by preforming a junction copper sheet and plastic rubber, then loading a plastic block with the junction copper sheet into a sealed space together, and then connecting the plastic block with an outgoing bus bar and an outgoing line. The embodiment uses the module diode to connect the conducting strip 2, and adopts the ultrasonic crimping technology to fix the diode 6 on the conducting strip 2 in a crimping way, thereby reducing the heating risk, avoiding the internal short circuit of the junction box caused by the flow of the soldering tin of the diode 6 of the original wire box, simultaneously increasing the reliability of the diode 6 after fixing, solving the technical problems of bending, welding, unstable welding and the like when the bus bar wire is led out for welding, not increasing the volume of the junction box, reducing the cost of the junction box and improving the reliability of the use of the junction box.

Be equipped with pad 3 on the conducting strip 2, can wrap up the welding position of busbar effectively, promote the welding quality of busbar and pad 3, avoid the rosin joint, and then improve photovoltaic module's stability and life-span, solved the problem of original terminal box busbar rosin joint.

The terminal seat 1 is provided with a connecting through hole 9, and the connecting through hole 9 is opposite to the diode 6. So that when the photovoltaic junction box is installed, the connecting terminal is contacted with the leading-out bus bar of the photovoltaic module at the position to be installed, the connecting terminal is prevented from being completely hollowed out at the connecting position of the connecting terminal and the leading-out bus bar, and the connecting terminal is completely exposed, so that the tightness of the junction box is improved, the reliability of the module is prevented from being reduced due to uncured pouring sealant, the safety risk is avoided, the installation procedure is simplified, and the installation efficiency is improved.

The terminal seat 1 is equipped with fixed column 4, and conducting strip 2 is fixed in the upper end of fixed column 4, and the upside of terminal seat 1 still is equipped with first supporting seat 10 and second supporting seat 11, and first supporting seat 10 is located the downside of conducting strip 2, and second supporting seat 11 is located the downside of diode 6.

In this embodiment, the connection terminal further includes a wire pressing connector 8, the wire pressing connector 8 is connected to a conductive sheet 2, and the wire pressing connector 8 has a groove for fixing the output wire 12.

Referring to fig. 3 to 4, the module diode includes a diode chip 601 and an insulator 602 coated on the outside of the diode chip 601, both ends of the insulator 602 have a connection radiator 7 extending toward the conductive sheet 2, and the connection radiator 7 is fixedly connected with the conductive sheet 2. The heat generated by the diode 6 can be timely conducted out by the connection radiator 7, the temperature of the junction point of the diode 6 is reduced, the working environment of the diode 6 is improved, the service life of the diode 6 is prolonged, the damage possibility of the photovoltaic solar module and the junction box of the photovoltaic solar module is reduced, the defects that the diode 6 of the original junction box is short in service life and extremely easy to damage are overcome, the connection radiator 7 is connected with the conducting strip 2, the connection strength between the conducting strips 2 is enhanced, and meanwhile, the junction box is convenient to assemble.

Referring to fig. 5, a high power intelligent photovoltaic junction box, comprising: the positive terminal box 13, the negative terminal box 14 and a plurality of middle terminal boxes 15, the positive terminal box 13, the negative terminal box 14 and the middle terminal boxes 15 all comprise a box body and the connecting terminals, the connecting terminals are arranged in the box body, the positive terminal box 13, the negative terminal box 14 and the middle terminal boxes 15 are all independent photovoltaic terminal boxes, and the positive terminal box 13, the negative terminal box 14 and the middle terminal boxes 15 are respectively welded with bus bars of the photovoltaic modules through the connecting terminals and form series connection. The positive terminal box 13, the negative terminal box 14 and the middle terminal box 15 are adhered to the back plate of the module through silica gel, and the main effect is to connect the electric power generated by the solar cell with an external circuit, lead out the internal current of the module, realize power output, and enable the photovoltaic solar module to charge electric equipment through the photovoltaic terminal box in the visible light.

This high-power intelligent photovoltaic terminal box adopts the box body of a plurality of separation settings and adopts the inside busbar series connection of subassembly, the at utmost uses busbar to replace the cable, effectively reduced the cost, power supply efficiency has been improved, the more extravagant problem of original terminal box cable use has been solved, and diode 6 is connected with conducting strip 2 through the technique of ultrasonic crimping, can reach terminal box overall dimension and minimize, the terminal box can also be suitable for different voltage simultaneously and use, also can reach the advantage that electrical clearance and creepage distance safety rule required, the defect that the creepage distance of original trisomy terminal box is insufficient to lead to the terminal box spontaneous combustion has been improved to the at utmost, therefore wide application prospect has.

Referring to fig. 6 to 8, the box bodies of the positive terminal box 13 and the negative terminal box 14 are further provided with a wire through hole 20 for fixing the output wire 12, the wire through hole 20 corresponds to the wire pressing joint 8, the lower side of the wire through hole 20 is provided with a wire fixing piece 16, and the wire fixing piece 16 is clamped and fixed with the box body.

Taking the negative electrode junction box 14 as an example, the box body comprises a box bottom 17 and a box cover 19, a box wall 18 extending upwards is arranged around the box bottom 17, the box cover 19 is fixed at the upper end of the box wall 18, an opening in the middle of the box bottom 17 is arranged, and the terminal seat 1 is fixed at the opening of the box bottom 17. When the box cover 19 is covered on the box wall 18, four walls of the box cover 19 extend into the grooves of the box wall 18 to form a sealing space, so that the defect of poor sealing performance of the original junction box is overcome.

In this embodiment, the welding part of the lead-out bus bar and the output line 12 on the conducting strip 2 and the bottom of the junction box are formed by ultrasonic one-time compression joint, and the lead-out bus bar is not required to be bent during welding, so that the false welding or disconnection is avoided, the contact area is large during welding, and the heating risk is reduced. The waterproof sealing ring grooves are formed in the outer side faces of the four walls of the junction box cover 19, and waterproof sealing rings are arranged in the waterproof sealing ring grooves, so that the waterproof performance of the product is improved, and the defect that the original junction box is easy to enter water is overcome.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The utility model provides a binding post of high-power intelligent photovoltaic terminal box, its characterized in that includes the terminal block and fixes the conducting strip on the terminal block, offer the perforation that is used for connecting the busbar on the conducting strip, connect in series the diode between two adjacent conducting strips, offer the connection through-hole on the terminal block, the connection through-hole is just right the diode.

2. The wiring terminal of the high-power intelligent photovoltaic junction box according to claim 1, wherein the diode is a module diode and comprises a diode chip and an insulator coated on the outer side of the diode chip, two ends of the insulator are respectively provided with a connecting radiator extending towards the direction of the conducting strip, and the connecting radiator is fixedly connected with the conducting strip.

3. The terminal block of the high power intelligent photovoltaic junction box of claim 2, wherein the module diode is crimped and fixed with the conductive sheet.

4. The connection terminal of the high-power intelligent photovoltaic junction box according to claim 2, wherein the through holes on the conducting strip are arranged on one side close to the diodes, and the connection radiator is arranged at two ends of the through holes.

5. The terminal block of any one of claims 1 to 4, wherein the conductive sheet is provided with a bonding pad.

6. The terminal block of claim 1, further comprising a wire-pressing connector, the wire-pressing connector being connected to a conductive sheet, the wire-pressing connector having a groove for fixing the output wire.

7. The wiring terminal of the high-power intelligent photovoltaic junction box according to claim 1, wherein the terminal base is provided with a fixing column, the conducting strip is fixed at the upper end of the fixing column, a first supporting base and a second supporting base are further arranged on the upper side of the terminal base, the first supporting base is located on the lower side of the conducting strip, and the second supporting base is located on the lower side of the diode.

8. The utility model provides a high-power intelligent photovoltaic terminal box, its characterized in that includes positive terminal box, negative terminal box and a plurality of intermediate junction box, positive terminal box, negative terminal box and intermediate junction box all include a box body and the binding post of any one of claims 1-7, binding post sets up in the box body, positive terminal box, negative terminal box and intermediate junction box are respectively through binding post and photovoltaic module's busbar welding and form the series connection.

9. The high-power intelligent photovoltaic junction box according to claim 8, wherein the box body comprises a box bottom and a box cover, a box wall extending upwards is arranged around the box bottom, the box cover is fixed at the upper end of the box wall, an opening in the middle of the box bottom is arranged, and the terminal seat is fixed at the opening of the box bottom.

10. The high-power intelligent photovoltaic junction box according to claim 8, wherein a through hole for fixing an output line is further formed in the box body of the positive junction box and the box body of the negative junction box, and a wire fixing piece is arranged on the lower side of the through hole and is fixedly clamped with the box body.

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