CN218217283U - Photovoltaic junction box convenient to repair - Google Patents

Abstract

The utility model relates to a photovoltaic terminal box just, comprises a box bod, the lid, base plate and diode module are located the box body, the diode module is parallelly connected with photovoltaic cluster battery board, the diode module includes the terminal, diode and heat conduction cover, the both ends of diode have the pin respectively, the pin is connected with the terminal electricity, the heat conduction cover is hollow structure, the junction of pin and terminal is pegged graft in the heat conduction cover, and the heat conduction cover is made for electrically conductive material, the screens has on the base plate, the screens is gone into to the heat conduction cover card and is connected with the screens electricity, make the diode module can dismantle to fix on the base plate. The utility model discloses a when the photovoltaic terminal box broke down, only need confirm the diode module of trouble and change can, need not pull down whole photovoltaic terminal box, alleviate the secondary damage to photovoltaic module.

Description

Photovoltaic junction box convenient to repair

Technical Field

The utility model relates to a terminal box technical field especially relates to a photovoltaic terminal box just repaiies.

Background

The photovoltaic terminal box is the device that photovoltaic module connects and protects, has the important function to photovoltaic power plant's normal fortune dimension, if certain battery piece has sheltered from in certain cluster battery piece, the inside diode of photovoltaic terminal box can fall the battery piece bypass that shelters from to protect whole circuit.

Most photovoltaic junction boxes in the current market are integrated, so that the photovoltaic junction boxes are inconvenient to disassemble and maintain, and in the working process of the junction boxes, the high temperature is an important reason for faults of the photovoltaic junction boxes, and the aging of sealing rings is accelerated by the increase of the temperature, so that the reverse current of diodes is increased, and even the diodes are damaged; because the diode wiring circuit in the photovoltaic junction box is basically welded and fixed, if one of the diodes is damaged, the diode wiring circuit needs to be integrally replaced, the maintenance cost is increased, and waste is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming the defect among the prior art to a photovoltaic terminal box is repaired to the utility model is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a photovoltaic junction box convenient to repair comprises a box body, a box cover, a base plate and a diode module, wherein the base plate and the diode module are positioned in the box body, the diode module is connected with a photovoltaic string battery plate in parallel,

the diode module includes terminal, diode and heat conduction cover, the both ends of diode have the pin respectively, the pin with the terminal electricity is connected, heat conduction cover is hollow structure, the pin with the junction of terminal is pegged graft in the heat conduction cover, just the heat conduction cover is made for electrically conductive material, the screens has on the base plate, the heat conduction cover blocks in the screens and with the screens electricity is connected, makes the diode module can dismantle to be fixed on the base plate.

Preferably, the pin comprises a pin coil, the terminal is columnar, the pin coil is wound on the terminal, and the diameter of the pin coil is matched with the inner diameter of the heat conduction sleeve, so that the pin coil is tightly attached to the inner layer of the heat conduction sleeve.

Preferably, the clamping position is provided with an electric connection point, and the heat conduction sleeve is abutted to the electric connection point.

Preferably, the heat-conducting sleeve is cylindrical, and the shape of the clamping position is matched with that of the heat-conducting sleeve and is an arc-shaped groove.

Preferably, a heat conducting grease is coated between the contact surfaces of the heat conducting sleeve and the clamping position.

Preferably, the heat conductive sleeve is filled with a heat conductive grease to fill the gap between the pin, the terminal, and the inner layer of the heat conductive sleeve.

Preferably, the substrate has a number of through slots corresponding to the number of the diode modules, and the diode modules are partially embedded in the through slots.

Preferably, a chute for mounting the substrate is arranged in the box body, a first positioning hole is formed in the edge of the substrate, a second positioning hole is formed in the box body, the position of the second positioning hole corresponds to that of the first positioning hole, the photovoltaic junction box further comprises a positioning pin, and the positioning pin is inserted into the first positioning hole and the second positioning hole to fix the substrate in the chute.

Preferably, the positioning pin has a large end portion, the size of the large end portion is larger than the aperture of the second positioning hole, and a buffer member is arranged between the large end portion and the outer surface of the box body.

Compared with the prior art, the beneficial effects of the utility model reside in that:

among the photovoltaic terminal box that provides among the above-mentioned technical scheme, the diode module can be dismantled with the base plate through heat conduction cover and be connected, heat conduction cover is made for electrically conductive material, and but in order to break down or damage this diode module of quick replacement when certain diode module, the screens has on the base plate, the heat conduction cover screens in and is connected with the screens electricity, make the diode module can dismantle to be fixed on the base plate, the diode module can be dismantled with the base plate and be connected promptly, and can keep the on-state under the connection status, guarantee the normal operating of base plate and diode.

Therefore, when the photovoltaic junction box breaks down, only the diode module with the fault needs to be determined and replaced, the whole photovoltaic junction box does not need to be detached, and secondary damage to the photovoltaic assembly is reduced; in the using process, a user can increase or reduce the number of the diodes according to actual conditions, and the phenomenon that too many normal photovoltaic string battery panels are isolated due to the isolation effect of the bypass diodes and the photovoltaic power is greatly reduced is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is the schematic view of the photovoltaic junction box of the embodiment of the present invention.

Fig. 2 is a schematic view of a substrate according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a diode module according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a photovoltaic junction box according to an embodiment of the present invention.

Description of reference numerals:

10. a case body; 11. a chute; 12. a second positioning hole; 13. positioning pins; 131. a large end portion; 14. a buffer member;

20. a box cover;

30. a substrate; 31. a through groove; 32. clamping; 321. connecting a power point; 33. a first positioning hole;

40. a diode module; 41. a diode; 411. a pin; 412. a pin coil; 42. a heat conducting sleeve; 43. and a terminal.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

As shown in fig. 1 to 4, the embodiment of the present invention provides a photovoltaic junction box convenient for repairing, which comprises a box body 10, a box cover 20, a base plate 30 and diode modules 40, wherein the base plate 30 and the diode modules 40 are located in the box body 10, the diode modules 40 are connected in parallel with a photovoltaic string battery plate, the base plate 30 and the diode modules 40 are located in the box body 10, the box cover 20 is detachably connected with the box body 10, so that the base plate 30 can be placed in or taken out of the box body 10, a plurality of diode modules 40 are arranged on the base plate 30 and connected in parallel with the photovoltaic string battery plate through the base plate 30, each diode module 40 comprises a terminal 43, a diode 41 and a heat conducting sleeve 42, the two ends of the diode 41 are respectively provided with a pin 411, the pin 411 is electrically connected with the terminal 43, the heat conduction sleeve 42 is of a hollow structure, the connection part of the pin 411 and the terminal 43 is inserted into the heat conduction sleeve 42, the heat conduction sleeve 42 is made of an electric conduction material, in order to rapidly replace a certain diode module 40 when the diode module 40 is in fault or damaged, the substrate 30 is provided with a clamping position 32, the heat conduction sleeve 42 is clamped into the clamping position 32 and is electrically connected with the clamping position 32, so that the diode module 40 is detachably fixed on the substrate 30, namely the diode module 40 is detachably connected with the substrate 30, and can keep an electrified state in a connection state, and the normal operation of the substrate 30 and the diode 41 is ensured.

Therefore, when the photovoltaic junction box breaks down, only the diode module 40 with the fault needs to be determined and replaced, the whole photovoltaic junction box does not need to be detached, and secondary damage to the photovoltaic assembly is reduced; in the use process, the number of the diodes 41 can be increased or reduced by a user according to actual conditions, and the phenomenon that due to the isolation effect of the bypass diodes 41, too many normal photovoltaic string battery panels are isolated, and the photovoltaic power is greatly reduced is avoided.

As shown in fig. 2 and fig. 3, the diode module 40 of the present embodiment includes a terminal 43, a diode 41, and a heat conduction sleeve 42, two ends of the diode 41 respectively have pins 411, the pins 411 include a pin coil 412, the pin coil 412 is electrically connected to the terminal 43, the heat conduction sleeve 42 is a hollow structure, a connection portion of the pin and the terminal 43 is inserted into the heat conduction sleeve 42, the heat conduction sleeve 42 is made of an electrically conductive material, the substrate 30 has a detent 32, and the heat conduction sleeve 42 is inserted into the detent 32 and electrically connected to the detent 32, so that the diode module 40 is detachably fixed on the substrate 30.

The number of the detents 32 can be 4-8, the diode modules 40 are connected in parallel with the photovoltaic cell panel in series, the number of the diode modules 40 is less than that of the detents 32, for example, 4 detents 32 are correspondingly provided with 3 diode modules 40, and each diode module 40 is respectively connected in parallel with one third of the cell panel; 5 screens 32 correspond 4 diode modules 40 of installation, and every diode module 40 is parallelly connected with quarter panel respectively, can avoid like this because bypass diode's isolation effect, leads to too much normal cell piece to be kept apart, and power too much descends. Of course, in other embodiments, the number of the position-limiting blocks 32 and the number of the diode modules 40 may be increased according to the cost of the battery panel and the power generation efficiency of the actual power station.

The terminal 43 is a terminal of a photovoltaic string battery board, and is generally fixed on the substrate 30, in this embodiment, the terminal 43 is separately disposed from the substrate 30, the diode module 40 includes the terminal 43, the terminal 43 is removed when the diode 41 is detached, when the diode module 40 is assembled, the pin coil 412 is wound on the columnar terminal 43, and then the heat conduction sleeve 42 is sleeved outside the pin coil 412, that is, the pin coil 412 and the terminal 43 are all plugged into the heat conduction sleeve 42, because the heat conduction sleeve 42, the pin coil 412 and the terminal 43 are made of conductive materials, meanwhile, the connection point 321 is disposed in the clip 32, after the heat conduction sleeve 42 is clipped into the clip 32, the connection point 321 is abutted and energized, and the terminal 43 can also be energized with the connection point 321, so as to achieve electrical connection between the diode 41 and the photovoltaic string battery board. Of course, the terminal 43 and the pin 411 may also be fixed by welding or other fixing methods, so as to ensure that the connection portion is located in the heat conductive sleeve 42 and abuts against the heat conductive sleeve 42.

Preferably, the heat conducting sleeve 42 is cylindrical, the cross section of the position limit 32 is opposite to the heat conducting sleeve 42, and the heat conducting sleeve 42 is arc-shaped or semicircular, and the size of the heat conducting sleeve 42 is slightly larger than the position limit 32, so that the heat conducting sleeve 42 and the position limit 32 are in interference fit, the stable installation of the diode on the substrate 30 is ensured, and when the diode module 40 needs to be disassembled, the heat conducting sleeve 42 is pried out of the position limit 32, the position limit 32 and the substrate 30 are not damaged, and other diodes can work normally.

The heat conduction sleeve 42 can also play a role of guiding the heat of the diode besides the role of fixing the diode, the diode can generate a large amount of heat in the working process and needs to be guided to the substrate 30 and the heat dissipation module, in this embodiment, the heat of the diode is guided to the heat conduction sleeve 42 through the pin 411, the heat conduction sleeve 42 is made of an electric conduction heat conduction material, such as pure copper or silver, the substrate 30 is also made of a heat conduction material, and the substrate 30 is beneficial to heat dissipation due to the large area of the substrate 30.

Preferably, the heat conductive sleeve 42 is filled with a heat conductive grease to fill the gap between the pin coil 412, the terminal 43, and the inner layer of the heat conductive sleeve 42, to speed up the heat conduction, and to facilitate the fixing of the pin coil 412 and the terminal 43 within the heat conductive sleeve 42.

Preferably, a thermal grease is applied between the contact surfaces of the thermal sleeve 42 and the detents 32 to further increase the rate at which heat is transferred from the thermal sleeve 42 to the substrate 30.

Preferably, the substrate 30 of the embodiment of the present invention has a plurality of through grooves 31, the number of the through grooves 31 corresponds to the number of the diode modules 40, the diode modules 40 are partially embedded in the through grooves 31, and the through grooves 31 are favorable for heat dissipation and cooling of the diodes in the diode modules 40.

The base plate 30 and the diode module 40 are arranged in the box body 10, and when a fault diode is disassembled, the base plate 30 needs to be taken out of the box body 10, so that the box cover 20 of the embodiment is clamped with the box body 10, and the box cover 20 can be disassembled if necessary. The lid 20 has a wiring groove at the edge thereof for allowing a wiring (not shown) to pass therethrough, the wiring being electrically connected to the substrate. The substrate 30 and the box 10 are also detachably connected, specifically, as shown in fig. 4, a sliding groove 11 for mounting the substrate 30 is provided in the box 10, and the thickness of the sliding groove 11 is greater than that of the substrate 30, so that the substrate 30 is slidably disposed in the sliding groove 11, and the diode extruded onto the substrate 30 is avoided.

In order to fix the substrate 30 in the box body 10, as shown in fig. 4, the edge of the substrate 30 has a first positioning hole 33, the box body 10 is provided with a second positioning hole 12, the position of the second positioning hole 12 corresponds to the first positioning hole 33, the photovoltaic junction box further includes a positioning pin 13, and the positioning pin 13 is inserted into the first positioning hole 33 and the second positioning hole 12 to fix the substrate 30 in the chute 11.

In order to facilitate the pulling out of the positioning pin 13 and the removal of the substrate 30, the positioning pin 13 has a large end portion 131, and the size of the large end portion 131 is larger than the aperture of the second positioning hole 12, so that the large end portion 131 is clamped outside the second positioning hole 12. Preferably, a buffer 14 is arranged between the large end 131 and the outer surface of the box 10, and the buffer 14 can be a gasket to increase the contact surface between the large end 131 of the positioning pin 13 and the top of the box 10.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (9)

1. A photovoltaic junction box convenient to repair is characterized by comprising a box body, a box cover, a base plate and a diode module, wherein the base plate and the diode module are positioned in the box body, the diode module is connected with a photovoltaic string battery plate in parallel,

the diode module includes terminal, diode and heat conduction cover, the both ends of diode have the pin respectively, the pin with the terminal electricity is connected, heat conduction cover is hollow structure, the pin with the junction of terminal is pegged graft in the heat conduction cover, just heat conduction cover is made for electrically conductive material, the screens has on the base plate, the heat conduction cover blocks in the screens and with the screens electricity is connected, makes the diode module can dismantle to be fixed on the base plate.

2. The easy-repair photovoltaic junction box according to claim 1, wherein the pins comprise pin coils, the terminals are columnar, the pin coils are wound on the terminals, and the diameter of the pin coils is matched with the inner diameter of the heat-conducting sleeve, so that the pin coils are tightly attached to the inner layer of the heat-conducting sleeve.

3. The easy repair photovoltaic junction box of claim 1, wherein the clip has a power connection point, and the heat conductive sleeve abuts against the power connection point.

4. The photovoltaic junction box convenient for repairing according to claim 1, wherein the heat conducting sleeve is cylindrical, and the shape of the clamping position is matched with that of the heat conducting sleeve and is an arc-shaped groove.

5. The photovoltaic junction box for repairing toilet bowls of any one of claims 1 to 4, wherein a heat conducting grease is coated between contact surfaces of the heat conducting sleeve and the clamping position.

6. The easy repair photovoltaic junction box of any one of claims 1 to 4, wherein the heat conductive sleeve is filled with a heat conductive grease to fill a gap between the pin, the terminal, and an inner layer of the heat conductive sleeve.

7. The easy repair photovoltaic junction box of any one of claims 1 to 4, wherein the base plate has a number of through slots corresponding to the number of diode modules, the diode modules being partially embedded in the through slots.

8. A photovoltaic junction box convenient to repair according to any one of claims 1 to 4, wherein a sliding groove for mounting the substrate is formed in the box body, a first positioning hole is formed in the edge of the substrate, a second positioning hole is formed in the box body, the position of the second positioning hole corresponds to that of the first positioning hole, and the photovoltaic junction box further comprises a positioning pin which is inserted into the first positioning hole and the second positioning hole to fix the substrate in the sliding groove.

9. The easy-repair photovoltaic junction box of claim 8, wherein the positioning pin has a large end, the size of the large end is larger than the diameter of the second positioning hole, and a buffer is arranged between the large end and the outer surface of the box body.

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