CN208063128U - Photovoltaic junction box - Google Patents

Abstract

The utility model provides a kind of photovoltaic junction box, belong to solar photovoltaic assembly technical field, upper cover including box body and for being closed with the tray cover, at least provided with four metalworks on the box body, it is connected respectively by bypass diode between two adjacent metalworks, make to include at least three bypass diodes in the photovoltaic junction box, three bypass diodes are respectively at three vertex of the same triangle.Photovoltaic junction box provided by the utility model, by the arrangement mode for changing diode, three bypass diodes are respectively at three vertex of the same triangle namely multiple bypass diodes do not form a line, but are arranged in broken line, solve the problems, such as that intermediate region diode temperature is higher, the arrangement of diode is changed simultaneously, intermediate region does not have diode, metalwork that can fill the region, so width area metalwork can be applied, be conducive to the integral heat sink of photovoltaic junction box.

Description

Photovoltaic junction box

Technical field

The utility model belongs to solar photovoltaic assembly technical field, is to be related to a kind of photovoltaic junction box more specifically.

Background technology

Photovoltaic junction box mainly plays electrical connection and protective action in photovoltaic module.In terms of electrical connection, photovoltaic connects The electric current that photovoltaic module generates is imported into electrical equipment or national grid by wire box by connecting terminal and connector.It is protecting Aspect, photovoltaic junction box are mainly prevented the generation of hot spot effect by bypass diode, prevent solar battery sheet and solar energy There is high-temperature damage problem in component package material.

In the actual use of photovoltaic module, solar battery sheet is once shielded, and shielded solar battery sheet will It can be used as the produced electric energy of the other solar battery sheets of load consumption, hot spot problem occurs.Shielded solar battery sheet is just It can generate heat, and then influence the service life of solar battery sheet, or even burn solar battery sheet.And photovoltaic module is generating heat The encapsulating material of battery panel region is also due to high temperature influence causes to damage.In order to reduce hot spot problem to solar battery sheet and The damage of component package material, photovoltaic junction box is generally by the way of integrated bypass diode.

The "-" type arrangement mode that arrangement design of the bypass diode in photovoltaic junction box at present mainly uses solves light Lie prostrate the hot spot problem of component.Bypass diode is arranged in "-" type, and each bypass diode is welded to the metal of photovoltaic junction box On part.When the percentage of batteries piece in photovoltaic module occurs covering and hot spot problem occurs, bypass diode conducting is shielded Cell piece group is bypassed.Electric current generates power consumption, diode fever by bypass diode continue working, and heat passes through metal Part scatters.

Photovoltaic junction box is using the method for installation bypass diode, and the installation operation of bypass diode is more convenient and metal The design of part is relatively simple, although can solve the problems, such as the influence of hot spot in the use of photovoltaic module, but has some to set Defect on meter.Due to not fully considering the heat concentration problem of intermediate region bypass diode in box body, intermediate region Diode not only itself will produce heat, while still suffer from the heat radiation of both sides diode, so two poles of intermediate region Tube temperature degree is higher, and "-" type, which is arranged, is unfavorable for the fast and effective release of diode heat；And "-" type arrangement mode also limits The design of the metalwork of support diode, the spacing between neighboring diode is smaller, cannot use the metalwork of roomy area, and The size of metalwork area directly affects the effect of heat dissipation.

Utility model content

The purpose of this utility model is to provide a kind of photovoltaic junction boxes, to solve heat dissipation effect existing in the prior art The technical problem of difference.

To achieve the above object, the technical solution adopted in the utility model is：A kind of photovoltaic junction box, including box body are provided And the upper cover for being closed with the tray cover, cassette bottom is equipped in the box body, at least provided with four metals in the cassette bottom Part is connected between adjacent two metalworks by bypass diode, makes to include at least in the photovoltaic junction box respectively Three bypass diodes, three bypass diodes are respectively at three vertex of the same triangle.

Further, four metalworks are fixed in side by side in "-" type on the box body, and the adjacent metal There are gaps between part.

Further, the centre-to-centre spacing of two adjacent bypass diodes is more than 2cm.

Further, the anode of the single bypass diode and cathode are separately connected two adjacent metalworks, and its In the positive or negative pole of a bypass diode and the cathode of another adjacent bypass diode or anode it is adjacent, After connection, three bypass diodes are connected in series.

Further, a side of the box body sets that there are two for photovoltaic cable penetrate the box body and the metal The through-hole of part connection.

Further, the through-hole is the first semi-circular hole being set on the box body and is set on fixed briquetting Second semi-circular hole is surrounded, and the fixed briquetting is fixedly connected with the box body.

Further, the hole wall of second semi-circular hole of the fixed briquetting is equipped with arched ribs, the arched ribs The central axis of present plane and second semi-circular hole.

Further, it is additionally provided on the inner wall of second semi-circular hole of the fixed briquetting vertical with the arched ribs Axial ribs, the arched ribs are connected with the axial ribs right-angled intersection.

Further, there are two the arched ribs tools, two arched ribs are arranged in parallel in second semi-circular hole Inner wall.

The advantageous effect of photovoltaic junction box provided by the utility model is：Compared with prior art, the utility model light Terminal box is lied prostrate, by changing the arrangement mode of diode, three bypass diodes are respectively at the three of the same triangle A vertex namely multiple bypass diodes do not form a line, but are arranged in broken line, solve intermediate region diode temperature Higher problem, has changed simultaneously the arrangement of diode, and intermediate region does not have diode, metalwork that can fill the region, institute Width area metalwork can be applied, be conducive to the integral heat sink of photovoltaic junction box.

Description of the drawings

It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this practicality is new Some embodiments of type for those of ordinary skill in the art without having to pay creative labor, can be with Obtain other attached drawings according to these attached drawings.

Fig. 1 is the configuration schematic diagram for the photovoltaic junction box that the utility model embodiment provides；

Fig. 2 is knot when metalwork is not connected with bypass diode in the photovoltaic junction box that provides of the utility model embodiment Structure schematic diagram；

Fig. 3 is that bypass diode is arranged in the structure on metalwork in the photovoltaic junction box that the utility model embodiment provides Schematic diagram.

Wherein, each reference numeral in figure：

1- upper covers；2- bypass diodes；3- metalworks；4- box bodys；5- fixes briquetting；6- photovoltaic cables；7- photovoltaics connect Device；8- cassette bottoms.

Specific implementation mode

In order to make technical problem to be solved in the utility model, technical solution and advantageous effect be more clearly understood, with Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein It applies example to be only used to explain the utility model, is not used to limit the utility model.

It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be directly another On one element or it is connected on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.

It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on ... shown in the drawings or position are closed System, is merely for convenience of describing the present invention and simplifying the description, does not indicate or imply the indicated device or element is necessary With specific orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more this feature.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

Also referring to Fig. 1 and Fig. 3, now photovoltaic junction box provided by the utility model is illustrated.The photovoltaic connects Wire box, including box body 4 and the upper cover 1 for being closed with the lid of the box body 4, are equipped with cassette bottom 8 in the box body, in the cassette bottom 8 At least provided with four metalworks 3, is connected respectively by bypass diode 2 between adjacent two metalworks 3, make institute It states and includes at least three bypass diodes 2 in photovoltaic junction box, three bypass diodes 2 are respectively at same three Three angular vertex.

Photovoltaic junction box provided by the utility model, compared with prior art, by change diode arrangement mode, three It is not to line up one that a bypass diode 2, which is respectively at three vertex of the same triangle namely multiple bypass diodes 2, Row, is triangularly arranged, then compares when on same straight line, and the spacing between adjacent two bypass diodes increases, with For Fig. 3, it is 3 region of metalwork between two bypass diodes 2 in both ends, has larger heat-dissipating space in this way, adjacent The distance between two bypass diodes 2 all increase, also have larger heat-dissipating space, in this way, intermediate two poles of bypass The heat that pipe 2 will not be radiated by both sides bypass diode 2, solves the problems, such as that intermediate region diode temperature is higher, simultaneously Due to changing the arrangement of diode, intermediate region does not have bypass diode 2, metalwork 3 that can fill the region, it is possible to Using width area metalwork 3, be conducive to the integral heat sink of photovoltaic junction box.

When photovoltaic junction box needs four bypass diodes 2, each bypass diode 2 is arranged in broken line, it is also assumed that Be divided into two rows, Liang Paizhong, adjacent 2 Heterogeneous Permutation of bypass diode, between adjacent in this way two bypass diodes 2 between Away from increase, the bypass diode 2 of 2 both sides of any bypass diode all will not directly be radiated an intermediate bypass two Pole pipe 2, therefore, each bypass diode 2 is there is no the problems in warmly being collected, and two bypass diodes at interval The surface area of the filling of metalwork 3 namely metalwork 3 can be used to increase between 2, improve the heat dissipation effect of photovoltaic junction box. It is identical as above-mentioned arrangement and principle when bypass diode 2 is four or more.

Wherein, referring to Fig. 1, cassette bottom is set in box body.

Further, also referring to Fig. 1 to Fig. 3, one kind as photovoltaic junction box provided by the utility model is specific Embodiment, four metalworks 3 are fixed in side by side in "-" type on the box body 4, and between the adjacent metalwork 3 There are gaps.Also it is conducive to photovoltaic junction box to radiate.

Further, it please refers to Fig.1 to Fig.3, a kind of specific implementation as photovoltaic junction box provided by the utility model The centre-to-centre spacing of mode, adjacent two bypass diodes 2 is more than 2cm.Between there are enough spaces, be conducive to by each Diode 2 heat in road discharges.

Further, refering to fig. 1 and Fig. 3, a kind of specific embodiment party as photovoltaic junction box provided by the utility model Formula, the anode and cathode of the single bypass diode 2 are separately connected two adjacent metalworks 3, and one of them described side The positive or negative pole of road diode 2 is adjacent with the cathode or anode of another adjacent bypass diode 2, after connection, three A bypass diode 2 is connected in series.

Further, referring to Fig. 1, a kind of specific implementation mode as photovoltaic junction box provided by the utility model, One side of the box body 4 sets that there are two for photovoltaic cable 6 penetrate the through-hole that the box body 4 is connect with the metalwork 3.

Further, referring to Fig. 1, a kind of specific implementation mode as photovoltaic junction box provided by the utility model, The through-hole is that the first semi-circular hole being set on the box body 4 and the second semi-circular hole being set on fixed briquetting 5 are closed It encloses, the fixed briquetting 5 is fixedly connected with the box body 4.In such a way that fixed briquetting 5 connects, photovoltaic wire can be convenient for Cable 6 mounts and dismounts.

Further, refering to fig. 1, as a kind of specific implementation mode of photovoltaic junction box provided by the utility model, institute The hole wall for stating second semi-circular hole of fixed briquetting 5 is equipped with arched ribs, the plane residing for the arched ribs and described the The central axis of two semi-circular holes.Photovoltaic cable 6 is contacted with arched ribs, can reduce the friction with hole wall.Wherein, the first half Corresponding on the hole wall of round hole to be equipped with arched ribs, the arched ribs on two hole walls are encircled into a circular configuration, support photovoltaic Cable 6.

Further, referring to Fig. 1, a kind of specific implementation mode as photovoltaic junction box provided by the utility model, It is additionally provided with the axial ribs vertical with the arched ribs, the arc on the inner wall of second semi-circular hole of the fixed briquetting 5 Shape muscle is connected with the axial ribs right-angled intersection.Wherein, on the hole wall of the first semi-circular hole it is corresponding be equipped with axial ribs, two The axial ribs being arranged on hole wall are symmetrical.

Further, referring to Fig. 1, a kind of specific implementation mode as photovoltaic junction box provided by the utility model, There are two the arched ribs tools, and two arched ribs are arranged in parallel in the inner wall of second semi-circular hole.To photovoltaic cable 6 Play the role of support, setting two can uniform balance support photovoltaic cable 6.

Wherein, it is respectively equipped with photovoltaic connector 7 on each photovoltaic cable 6.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model Protection domain within.

Claims (9)

1. photovoltaic junction box, including box body and the upper cover for being closed with the tray cover, the box body is interior to be equipped with cassette bottom, spy Sign is：At least provided with four metalworks in the cassette bottom, pass through bypass two between adjacent two metalworks respectively Pole pipe connects, and makes to include at least three bypass diodes in the photovoltaic junction box, three bypass diode difference Three vertex in the same triangle.

2. photovoltaic junction box as described in claim 1, it is characterised in that：Four metalworks are fixed in side by side in "-" type On the box body, and there are gaps between the adjacent metalwork.

3. photovoltaic junction box as described in claim 1, it is characterised in that：The centre-to-centre spacing of two adjacent bypass diodes More than 2cm.

4. photovoltaic junction box as described in claim 1, it is characterised in that：The anode and cathode point of the single bypass diode Do not connect two adjacent metalworks, and the positive or negative pole of one of them bypass diode with described in adjacent another The cathode or anode of bypass diode are adjacent, and after connection, three bypass diodes are connected in series.

5. photovoltaic junction box as described in claim 1, it is characterised in that：One side of the box body is used for light there are two setting Hint cable penetrates the through-hole that the box body is connect with the metalwork.

6. photovoltaic junction box as claimed in claim 5, it is characterised in that：The through-hole is first be set on the box body Semi-circular hole and the second semi-circular hole being set on fixed briquetting are surrounded, and the fixed briquetting is fixed with the box body to be connected It connects.

7. photovoltaic junction box as claimed in claim 6, it is characterised in that：Second semi-circular hole of the fixed briquetting Hole wall is equipped with arched ribs, the central axis of plane and second semi-circular hole at the arched ribs.

8. photovoltaic junction box as claimed in claim 7, it is characterised in that：Second semi-circular hole of the fixed briquetting The axial ribs vertical with the arched ribs are additionally provided on inner wall, the arched ribs are connected with the axial ribs right-angled intersection.

9. photovoltaic junction box as claimed in claim 7, it is characterised in that：There are two the arched ribs tools, two arcs Muscle is arranged in parallel in the inner wall of second semi-circular hole.