ES2402011B1 - CONNECTION BOX, PARTICULARLY FOR PHOTOVOLTAIC FACILITIES - Google Patents

Abstract

Junction box, particularly for photovoltaic installations comprising a support piece (1) mountable on a photovoltaic board and comprising at least one input (1e) for the conductive tapes (8), and connection elements (9) arranged in the upper face (1f) of the support piece (1) to connect each conductive tape (8) to the support piece (1); and a terminal-holder body (2) attachable to the support piece (1) by means of a coupling system (5) and comprising a lower face (2a) facing the support piece (1) and an upper cover (3 ), and in which # the input conduits (10) for the connection cables (7) are located between the terminal holder body (2) and the top cover (3); # the connection terminals (6) are fixed to the lower face (2a) of the terminal holder body (2) in respective positions where their contact elements (6j) coincide with the respective connection elements (9) of the support piece (1); # the contact elements (6j) are removably connected to the connection elements (9) so that, when the terminal holder body (2) is removed from the support piece (1), the contact elements (6j) are decoupled of the connecting elements (9); # the upper face (1f) of the support piece (1) and the lower face (2a) of the terminal holder body (2) are d is maintained between each other by a peripheral wall (1b, 2b, 2c).

Description

CONNECTION BOX, PARTICULARLY FOR FACILITIES PHOTOVOLTAICS TECHNICAL FIELD OF THE INVENTION

The present invention falls within the technical field of the elements and accessories for electrical connections and, particularly of the junction boxes useful in electrical installations that are especially suitable for photovoltaic installations

BACKGROUND OF THE INVENTION

The junction boxes are used to interconnect each other different elements or components, such as, by example, bus-type conductive tapes, components discrete electronics or electrical wiring. Normally in the junction boxes comprise connection systems with various elements and metal parts associated with elements mechanics that allow joining and keeping connected those elements and pieces. The connection of the type conductive tapes bus with discrete electronic components such as diodes protection or resistance is done in various ways, such as for example by welding, clamping, riveting, screwed etc. and by combining this type of connections.

Bus-type conductive tapes are material tapes conductor, usually of tinned Cu, which establish the electrical interconnection of all photovoltaic cells They make up a panel. Normally all cells are connect in series. In general, photovoltaic panels They take four buses, two from inside the photovoltaic panel of them are the ends of the cell series, positive and negative, and two intermediate connections used to interconnect protection diodes bypass. The conductive tape corresponding to the positive end of the cell series connects to the connection terminal of a

positive connection cable coming out of the junction box, while the conductive tape corresponding to the end Negative cell series connects to the terminal of connection of a negative connection cable that comes out of the box of connections.

US200628953A1 patent application discloses a connection box for connected solar cell modules with bus-type conductive tapes with a housing in which electronic devices and a device are arranged electrical connection with at least one terminal in the form of clamp mechanism arranged in such a way that at least one conductive tape leaving the solar cell module can insert into the clamp mechanism in two different opposite directions of entry.

Patent application DE102005008123A1 discloses an electrical junction box, especially for solar installations, with an entrance opening for a conductive cable provided on the wall of the box and with a traction damping element in the conductor cable with a prestressing element that pretends the element shock absorber so that it only exerts clamping force in a cable inserted after it has passed a certain insertion depth at which time it releases the prestressing of the damping element so that it reaches a position where it exerts clamping force the cable introduced that acts as a buffer for the cable.

Patent application ES2347514A1 discloses a electrical junction box, which comprises inside at least two electrical interconnection terminals, with three different fixing and connection zones. Your first zone is provided for the bus-type conductive tape, and has pairs of tongues arranged successively in whose inside a section of the connecting tape is housed, and with

a window at the base to insert a protrusion from the box of connections. In the second zone planned for at least one discrete electronic component, the junction box counts with three contact points, two extreme notches facing each other and an intermediate tab that connect with the one component pole. The third area of the box connections is planned for an electric cable and has extensions that enable mechanical fixation by pressure and / or welding to the cable conductor.

In photovoltaic installations, junction boxes of prior art are mounted on the panels photovoltaic so that the base of the box connections permanently adheres to the panel itself by silicone or an analogous adhesive. To access inside the box for maintenance work and / or repair, the box is equipped with a top cover removable. However, since the box as such is permanently attached to the photovoltaic panel, these tasks they can only be done on site or, where appropriate, detaching the entire panel box and pasting it again Once it is repaired. This substantially complicates the maintenance and repair of the boxes connections and the components found in your inside.

DESCRIPTION OF THE INVENTION

The present invention aims to overcome the inconveniences of the state of the art detailed above, via a junction box, particularly for photovoltaic installations where terminals are housed metallic connection to connect a plurality of tapes conductors to a plurality of connection cables with respective souls entering the junction box through of respective inlet ducts, characterized in that

comprises a support piece, for example of material injected plastic or similar, mountable on a plate photovoltaic and comprising at least one input for the conductive tapes, and connection elements arranged in the upper face of the support piece to connect each tape connector to the support piece;

a terminal holder body attachable to the piece of support by means of a coupling system and comprising a lower face facing the support piece and a cover higher;

the input conduits for the connection cables they are located in the terminal holder body;

the connection terminals are fixed to the face lower body of terminal holder in respective positions in which contact elements of the respective terminals of connection match the respective elements of connection of the support piece;

the contact elements are removably connected to the respective connection elements so that when the terminal holder body is removed from the support piece, the contact elements are decoupled from the elements of Connection; Y

the upper face of the support piece and the face Bottom of the terminal holder body are spaced between yes through a peripheral wall that surrounds each entrance to conductive tapes and connection terminals for connection cables.

The top cover of the terminal holder can be removable terminal body or, alternatively, It can be solidary of the terminal holder body.

According to the invention, the coupling system can understand a couple of coupling partitions that extend up opposite sides of the piece of

bracket and a pair of coupling flanges that extend downward from opposite sides of the terminal body such that each coupling partition is attaches to one of the coupling flanges by embedded, or alternatively a pair of partitions of coupling that extend down opposite sides of the terminal holder body and a pair of flanges coupling that extend upward from sides opposite of the support piece so that each partition coupling is coupled to one of the coupling flanges by embedded.

According to an embodiment of the invention, the part of support comprises a base plate on which the upper face of the support piece, in which case the wall peripheral comprises an outer partition that emerges top of the top face of the motherboard and a wall external perimeter that emerges inferiorly and peripherally from the terminal body and which is sized to hug externally the outer partition of the support piece. According to this embodiment, the peripheral wall can further comprise an internal perimeter wall parallel to the outer perimeter wall, so that the outer partition of the support piece is arranged between the perimeter wall external and the internal perimeter wall of the terminal body. In turn, the outer perimeter wall and the wall internal perimeter may emerge inferiorly from a wing horizontal that surrounds the lower face of the terminal body. Between the outer perimeter wall of the body terminal holder and the outer partition of the support piece an o-ring seal may be arranged, which it can be embedded in an outer seat of the partition Exterior.

In a preferred embodiment of the invention, the connection terminals are fixed on the lower base of the terminal body in axially parallel positions each other and with respect to the inlet ducts. In this case, each connection terminal connectable to a cable connection is arranged in axial alignment with the conduit corresponding input that crosses a first side of the peripheral wall of the terminal holder body. Each terminal of connection can comprise a first localized extreme part between two centering partitions emerging from the inner face of the terminal holder body in proximity to the side of the peripheral wall, and a second end part comprising the contact element connected to one of the elements of emerging connection of the upper face of the piece of support. Preferably, each connection element is a metal contact plate arranged transversely with with respect to the inlet ducts, and the contact element of each connection terminal comprises at least two tabs elastically flexible contact struts arranged in such a way that they are susceptible to imprison the plate of contact with each other. In turn, each contact plate can be immobilized between two immobilization partitions that emerge inferiorly from the upper face of the piece of support. The immobilization partitions can be partitions grooves that have grooves in which they fit respective vertical edges of the contact plate. These metal plates help improve electrical connection between these buses and body mounted terminals terminal holder Preferably, the contact plates

They are removable.

In

a realization preferential from the terminals from

Connection

Y of the  body terminal holder every terminal from

Connection

understands two walls  lateral parallel Y

distanced from each other, and joined superiorly by a base superior, which extend between said first extreme part and said second end part of the connection terminal while that of the lower surface of the terminal holder body a support partition against which the base rests upper terminal connection. According to this embodiment preferably, each of the side walls comprises a first section neighboring said first extreme part of the terminal of connection, a second section neighboring said second part end of the connection terminal and an intermediate section located between said first and said second section of the side wall, and the side walls comprise respective bottom edges provided with individual incoming immobilization, in which two heads of respective vertical retention tabs facing that emerge from the underside of the terminal body. The mentioned vertical immobilization incoming can be provided on the lower edges of said second sections of the side walls.

Preferably, each connection terminal comprises a lower bridge with a horizontal central part attached to the lower edges of the intermediate sections of the walls lateral. The lower bridge comprises a first wing flexible inclined towards the upper base of the terminal connection in direction to said first extreme part and arranged between said first sections of the walls lateral, and a second flexible wing inclined towards the base top of the connection terminal in the direction of said second extreme part and arranged between said second sections of the side walls. In this case, the first sections of the side walls comprise two first entrances of retention faces that extend from their respective lower edges towards the upper base of the terminal

connection, each first retention inlet comprising a final stretch widened towards the first extreme part of the connection terminal, while the second sections of the side walls comprise two incoming seconds of retention faces that extend from their respective lower edges towards the upper base of the terminal connection, comprising every second retention inlet a final stretch widened towards the second extreme part of the connection terminal Each retention incoming is sized to allow the insertion of a pole of a electronic component from the respective lower edge of the corresponding side wall, and each of the wings flexible comprises an end section of curved retention that extends between the widened end sections of the retention inlets facing each other, so that the section retention end is likely to push the pole of the electronic component towards said widened end sections of retention inlets.

The connection terminals may be arranged way that the first retention inlets of a terminal connection are aligned with the first incoming of retention of at least one neighboring connection terminal, and the incoming retention seconds are aligned with the Incoming seconds of retention of at least one terminal neighbor connection. In turn, the lower bridge can understand, seen axially of the connection terminal, two halves separated by an axial groove.

The presence and alignment of retention entrances allow one of the conductive tapes corresponding to the positive end of the series of photovoltaic cells be directly connectable to the connection terminal of a cable positive connection coming out of the junction box, while the other conductive tape (s)

corresponding (s) to the positive end of the cell series photovoltaic is (n) connectable (s) to the terminal of connections neighbour. In turn, one of the conductive tapes corresponding to the negative end of the cell series Photovoltaic can be connected to the connection terminal of a negative connection cable coming out of the junction box while the other conductive tape (s) corresponding (s) to the negative end of the cell series Photovoltaic can be connected to or to the terminals of neighboring connections.

Also, the connection terminals can be at your once connected to each other by respective elements electronic such as protection diodes, whose respective poles are inserted in the entrances of the connection terminals Thus, for example, in the case of presence of four connection terminals, the poles of the protection diode that interconnects the two terminals of connectable connection to the tapes of the positive end of the series of photovoltaic cells is inserted in the second Incoming retention of each of these terminals connection, the poles of the interconnecting protection diode the two connection terminals connectable to the belt of the negative end of the series of photovoltaic cells are inserted in the second retention inlet of each of these connection terminals, and the diode poles of intermediate protection are inserted in the respective first retention inlets of the two terminals of connection that are neighbors respectively to the terminals of connection directly connected to the connection cables. TO through this interconnection of the protection diodes are they form intermediate connections by way of bypass. This provision to "tresbolillo" allows to use terminals of identical connection and save space inside the

connections Box. Also, how to immobilize the poles of the electronic elements in the terminals of connection facilitates the assembly and disassembly of such elements electronic and ensures a secure and firm fixation of the electronic elements in the connection terminals.

In a preferred embodiment of the connection terminal, the second end part of the connection terminal comprises a U-shaped end wall with side wings emerging from the respective side walls and with a central part away from the side walls. The extreme wall surrounds the less part of a distal recess in the upper base of the connection terminal At least the central part of the wall extreme fits into a retention pocket that emerges from the lower face of the terminal holder body. In accordance with this preferred embodiment, the transverse tabs of contact comprise a first transverse tongue of contact extending downward from the upper base of the connection terminal and at least a second tab transverse contact extending downward from the central part of the extreme wall. The tongues contact cross sections comprise respective sections initials inclined towards each other, so that contact each other in a contact area when the plate of contact of emergent of upper face of the piece of support is not inserted between the transverse tabs of contact, and where the contact plate is imprisoned when inserted between the transverse tabs of Contact.

Each transverse contact tab may comprise a free end tilted in the opposite direction to its section inclined initial to facilitate the insertion of the plate Contact. The central part of the extreme wall can comprise two wall parts separated from each other by a

vertical groove, so that the wall parts emerge second contact tabs.

On the other hand, the upper base of each terminal of connection can comprise a localized proximal recess above the lower bridge, which comprises an edge of transverse proximal to the first end of the terminal connection, in which you hook the head of a column of corresponding anchor of a plurality of columns of emerging anchorage of lower body base terminal holder

According to the invention, the first extreme part of al minus each connection terminal that can be connected to a cable connection, and preferably of all terminals of connection, can comprise at least one crimping wing susceptible to imprison the core of the connection cable correspondent.

Each of the inlet ducts can be formed by a bottom that emerges horizontally from one side of the outer perimeter wall of the terminal holder body, and a complementary top that emerges horizontally on the same side of the top cover thus forming an axial passage for the corresponding connection cable. To seal the entrance ducts, in the axial steps you can arrange separate pass-through through whose respective steps inside pass the respective connection cables. These cable glands can replace conventional cable glands, saving the need for a plastic part and facilitating the mounting.

The possibility of the terminal body and the top cover comprising at least one rib or energy director arranged around each of his internal faces that allow the union of both parts by vibration welding before heating the parts to

link.

As can be seen, the present invention solves satisfactorily the inconveniences of the boxes of connections of the state of the art since being the body terminal holder is easily removable from the piece of support and when carrying the connection terminals, elements electronic and connection cables, the maintenance and repair operations in separate places of the photovoltaic panel.

BRIEF DESCRIPTION OF THE FIGURES

Aspects and embodiments of the invention based on schematic drawings, in those who

Figure 1 is a side perspective view of a realization of the junction box in accordance with this invention;

Figure 2 is a side perspective view partially sectioned from the junction box shown in figure 1;

Figure 3 is a bottom plan view of the lid present in the junction box shown in figure 1;

Figure 4 is a side perspective view of the terminal body present in the junction box shown in figure 1;

Figure 4a is a side perspective view of the cable glands present in the junction box shown in the Figure 1;

Figure 5 is a side perspective view of the O-ring present in the junction box shown in the Figure 1;

Figure 6 is a side perspective view of the support piece present in the junction box shown in figure 1;

Figure 7 is a side perspective view that show in more detail the support piece shown in the figure 6;

Figure 8 is a perspective view of a realization of a contact plate present in the piece of support shown in figure 7;

Figure 9 is a bottom plan view of the body terminal holder shown in figure 4;

Figure 10 is a partial bottom perspective view of the terminal holder body shown in figure 9;

Figure 11 is a perspective view of the part bottom of a connection terminal for the junction box of the present invention;

Figure 12 is a perspective view of the part upper of the connection terminal shown in figure 11;

Figure 13 is a side view of the terminal of connection shown in figure 11;

Figure 14 is a bottom perspective view of the terminal body shown in figure 9, in which terminals corresponding to figures 11 are inserted to 13;

Figure 15 is a sectional view of the body terminal holder along the A-A line marked in figure 14;

Figure 16 is a bottom perspective view of the terminal body showing component connection discrete electronic in the form of protection diodes between the connection terminals;

Figure 17 is a partial view showing with more detail the connection of the protection diodes;

Figure 18 is a side elevation view of a connection terminal corresponding to figure 13 to which a diode is connected in one of the possible positions of Connection.

In these figures numerical references appear that identify the following elements:

one

support piece

1st

base plate of the support piece

1 B

outer partition of the support piece

1 C

Outer seat step for O-ring

1d

grooved partition

1e

entry recess

1f

upper face of the support piece

2

terminal body

2nd

lower face of the terminal holder body

2b

internal perimeter wall

2 C

outer perimeter wall

2d

horizontal wing

2e

centering partition

2f

support partition

2 g

anchor column

2h

support partition

2i

vertical retention tab

2j

retained pocket

2k

first opening

2l

second opening

2m

third opening

3

top cover

3rd

inside face of the lid

3b

perimeter flange

3c

lateral incoming

4

o-ring

5

coupling system

6

connection terminal

6th

upper base

6b

extreme first part with crimping wings

6c

side wall

6d horizontal joint section

6e incoming immobilization

6f first retention incoming

6g second retention incoming

6h lower bridge

6i extreme retention section

6j, 6j 'transverse contact tabs

6k proximal recess in the base

6l distal recess in the base

6m extreme "U" wall

6n anchor housing

7 connection cable

7th core of the connection cable

8 connector tape

9 contact plate

9th main body

9b side wing

9c vertical slot

9d through hole

10 inlet conduit for the connection cable

10th lower part of the duct

10b upper part of the duct

11 discrete electronic component (diode or resistance)

11th pole of the electronic component

12 vent hole

13 filter

14 ventilation opening

15 bushings

15th internal passage of the grommet

16 coupling partition

16th lower support section

16b central vertical section

16c ramp 16d horizontal step 16e side wing 17 coupling flange 17th vertical wing 17b horizontal junction section 17c horizontal tab 17d horizontal connection section 17e vertical connection section

MODES OF CARRYING OUT THE INVENTION

The figures attached to this specification show an embodiment of a junction box for photovoltaic installations according to the present invention, in which metal connection terminals -6- are housed for connect four conductive tapes -8- to two cables connection -7- with respective souls -7a- entering the box of connections through respective inlet ducts -10-.

Specifically, the junction box comprises a piece -1-mountable support on the back of a plate photovoltaic (not shown in the figures), for example by silicone or similar and / or a double-sided tape adhesive, and comprising four entries -1e- for four -8- bus-type conductive tapes, and four elements of connection -9- arranged on the upper face -1f-of the piece support -1- to connect each connecting tape -8- to a connection terminal -6-, and a terminal holder body -2coupleable to the support piece -1- by means of a system of coupling -5- and comprising a lower face -2 faced with the support piece -1- on which they are fixed four connection terminals -6- in respective positions in which contact elements -6j-of the respective connection terminals -6- match the respective

connection elements -9- of the support piece -1-. The contact elements -6j- are removably connected to the respective connection elements -9- so that when the terminal holder body -2-is removed from the piece of support -1-, the contact elements -6j- are decoupled from the connection elements -9-. The terminal holder body It also includes a removable top -3- with a flange perimeter -3b- that externally embraces a perimeter wall external -2c- that emerges inferiorly and peripherally from the body terminal holder -2-. The inner face -3a-of the lid upper -3- rests on terminal body -2-.

The top cover -1- comprises a ventilation hole -12- under which a filter is welded -13- in alignment vertical with a ventilation opening -14- in the body terminal holder -2-. The filter -13- prevents condensation of moisture inside the junction box and thus prevents corrosion of the components housed inside the same, thus extending their useful life.

The upper face -1f- of the support piece -1- and the lower face -2a- of the terminal holder body -2- are distanced from each other by a peripheral wall -1b, 2b, 2c- surrounding inputs -1e- for conductive tapes -1e- and connection terminals -6- for the cables connection -7-. The peripheral wall -1b, 2b, 2c- comprises a outer partition -1b-emerging from the face upper -1f- of the base plate -1a- of the support piece -1 as well as the outer perimeter wall -2c- emerging below and peripherally of the terminal holder body -2- and which is sized to externally embrace the outer partition -1b- of the support piece -1-. The peripheral wall -1b, 2b, 2c-further comprises an inner perimeter wall -2b parallel to the outer perimeter wall -2c-, so that the outer partition -1b- of the support piece -1- remains

arranged between the outer perimeter wall -2c- and the wall internal perimeter -2b- of the terminal holder body -2-. From the outer perimeter wall -2c- and the inner perimeter wall -2b- emerges inferiorly from a horizontal wing -2d- that surrounds the lower face -2a- of the terminal holder body -2-. Between the outer perimeter wall -2c- of the terminal holder body -2- and the outer partition -1b- of the support piece -1- is arranged a sealing O-ring -4- fitted in an outer seat -1c- of the outer partition -1b-.

The support piece -1- and the terminal holder body -2 are coupled to each other by means of a coupling system -5- comprising a pair of coupling partitions -16 that extend upward from opposite sides of the piece of support -1- and a couple of coupling flanges -17- that extend down from opposite sides of the body terminal holder -2-so that each partition of coupling -16- is coupled to one of the flanges of coupling -17- by embedded.

The coupling partition -16- comprises in its part bottom one lower support section -16a- curved, one section central -16b- provided in its upper part with two ribs that they form a ramp -16c- in whose part furthest from the surface of the central section -16b- forms a horizontal step -16d-. The central section is laterally delimited between perpendicular side wings -16e-.

On the other hand, the coupling flange -17- comprises two vertical wings -17a- joined by their lower ends by a section of horizontal union -17b- from which emerges outwardly a horizontal tab -17d-. The extremes upper of the vertical wings -17a- are finished in two horizontal connecting sections -17d- which are joined laterally to an upper part of the terminal holder body -2- through a vertical connection section, -17e-. Between

the vertical wings -17a- of the coupling flange -17- and the corresponding side of the terminal-holder body -2 defines a vertical egg in which the section is inserted central vertical -16a- of the coupling wall -16-, of such that the horizontal flange -17c- of the flange of coupling -17- is fitted between the support section bottom -16a- and the horizontal step -16d- of the partition wall coupling -16-, and the outer side edges of the respective vertical wings -17a- remain guided in the respective side wings -16e- of the coupling partition.

The top cover -3- has, on two opposite sides, side entrances -3c- that allow the passage of respective coupling walls -16- and flanges of -17- corresponding coupling.

The connection terminals -6- are fixed in the base lower -2a- of the terminal holder body -2-in positions axially parallel to each other and with respect to the ducts input -10-. Each connection terminal -6- can be connected to a connection cable -7- is arranged in axial alignment with the corresponding inlet conduit -10- that crosses a first side of the peripheral wall -1b, 2b, 2c- of the body terminal holder -2-. Each of the inlet ducts -10- is formed by a bottom -10a- that emerges horizontally on one side of the outer perimeter wall –2c- of the terminal holder body -2-, and a complementary complementary part -10b that emerges horizontally from the same side of the upper cover -3- thus forming an axial passage for the cable corresponding connection -7-. To seal the ducts input -10-, in the axial steps there are two cable passages -15- whose respective internal passages -15 cover the respective connection cables -7-.

Each connection terminal -6- comprises a first part extreme -6b- located between two centering partitions -2e

emerging from the inner face -2a- of the portal body terminals -2- in the proximity to the side of the peripheral wall -1b, 2b, 2c-, and a second extreme part -6m- comprising the contact element -6j- connected to one of the elements -9- connection emerging from the upper face of the piece of support -1-. Between the centering partitions -2e- which are arranged in front of an inlet duct -10- is located a first opening -2k- on the underside -2a- that crosses the terminal holder body -2-.

Each connection element -9- is a contact plate -9- metal arranged transversely with respect to the entrance ducts -10- between two immobilization partitions -1d- that emerge inferiorly from the upper face -1f- of the support piece -1-, and comprises a main body -9a- in T with two opposite wings -9c- that are separated from the main body -9a- by paths vertical grooves -9c-, and with a through hole -9d- in the lower part of the body main -9a-. The immobilization partitions are partitions grooves that have grooves in which the respective vertical edges of the side wings -9b- of the contact plate -9-. Lower body main -9a- fits into a transverse groove in the face upper -1f- of the support piece -1-.

Each connection terminal -6- comprises two walls -6c- parallel and spaced apart, and joined superiorly by an upper base -6a-, which extend between the first extreme part -6b- and the second extreme part -6m- from the connection terminal, while from the surface lower -2a- of the terminal holder body -2- a first support partition -2f- and a second support partition- 2h- against which the upper base -6a- of the terminal is supported connection -6-. On the other hand, each of the walls sides -6c- of the connection terminal -6- comprises a

first section neighbor to the first extreme part -6b- of the connection terminal -6-, a second section neighboring the second extreme part -6m- of the connection terminal -6- and a section intermediate located between said first and said second side wall section -6c-. Turn the walls -6c sides comprise respective lower edges provided with two incoming immobilization -6e-, in the that fit respective heads of respective tabs of -2- facing vertical retention emerging from the face lower -2a- of the terminal holder body. Those mentioned incoming vertical immobilization -6e- are provided in the lower edges of the second sections of the walls lateral -6c-. The first extreme part -6b- of each terminal of connection -6- comprises two crimping wings capable of clamp the core -7a-of the corresponding connection cable -7 and attached to the upper base -6a- of the terminal of connection -6- by means of a horizontal connecting section -6d-.

The upper base -6a- of each connection terminal -6 comprises a proximal recess -6k- located above the lower bridge -6h-, comprising a transverse edge proximal the first extreme part -6b- of the terminal connection -6-, in which it hooks the head of a column of corresponding -2g- anchor of a plurality of columns of anchor -2g- emerging from the lower base -2a- of the body terminal holder -2-. The proximal transverse edge is provided with an anchor housing -6n- in which the anchor column head -2g-. Enter the column of anchor -2g- and the first support partition -2f- is planned a second opening -2l- on the lower face -2a- of the body terminal holder -2-.

Each connection terminal -6- comprises a bridge lower -6h- composed of two halves separated by a axial groove, as well as with a horizontal central part attached

to the lower edges of the intermediate sections of the side walls -6c-. Also, the lower bridge -6h comprises a first flexible wing inclined towards the base -6a- of the connection terminal -6- in the direction of the first extreme part -6b- and arranged between the first sections of the side walls -6c-, and a second wing flexible inclined towards the upper base -6a- of the terminal connection -6- towards the second end part -6m and arranged between the second sections of the side walls -6c-. The first sections of the side walls -6c comprise two first retention recesses -6fronted that extend from their respective edges lower towards the upper base -6a- of the terminal connection -6-, comprising each first retention inlet -6f- a final stretch widened towards the first extreme part -6b- of the connection terminal -6-, while the seconds sections of the side walls -6c- comprise two incoming -6g-faced incoming seconds that are extend from their respective lower edges towards the upper base -6a- of the connection terminal -6-, every second retention inlet -6g- comprises a widened end section towards the second end part -6m- of the connection terminal -6-. Each retention inlet -6f, 6g- is sized to allow the insertion of a pole -11a- of a component electronic -11-from the respective lower edge of the corresponding side wall -6c-. In turn, each of the flexible wings comprise an end-retention section 6-curved that extends between the widened end sections of the retention entrances -6f, 6g- faced, so that the extreme retention section -6i- is susceptible to push the pole -11a- of the electronic component -11- towards the widened end sections of the retention inlets -6f, 6g- (see figure 18). The connection terminals -6

are arranged so that all your first entrees of retention -6f- are aligned with each other. Also his seconds Retention inlets -6g-are aligned with each other.

The second extreme part -6m-of each terminal connection -6- comprises an end wall -6m- U-shaped with lateral wings emerging from the respective walls -6c- and with a central part away from the walls lateral -6c-. The extreme wall -6m- surrounds at least part of a distal recess -6l- at the upper base -6a-del connection terminal -6-. The central part and initial parts of the side wings of the extreme wall -6m- fits in a retained pocket -2j- emerging from the underside -2a- of the terminal holder body -2-. The contact element -6j- of each connection terminal -6-comprises tabs contact cross sections -6j, 6j'- elastically flexible arranged in such a way that they are susceptible to imprison the contact plate -9-with each other. Between the cajeado of retention -2j- and the second support partition -2h- is found a third opening -2m- that crosses the lower face -2a of the body holder.terminals -2-.

A first transverse contact tongue -6j- is extends down from the top base -6a- of the terminal of connection -6- and two second transverse tabs of contact -6j'- that extend down from the part extreme wall center -6m-. The central part of the extreme wall -6m- comprises two separate wall parts each other by a vertical groove. The second tabs of contact -6j'- emerge from the respective wall parts of the central wall of the extreme wall -6m-.

The transverse contact tabs -6j, 6j'- comprise respective initial sections inclined one towards other, so that they contact each other in an area of contact when the contact plate -9- emergent face

top of the support piece -1-, is not inserted between the transverse contact tabs -6j, 6j'-, and where the contact plate -9- is imprisoned when it is inserted between the transverse contact tabs -6i, 6j- (see figure 18). Each contact cross tab -6j, 6j'- comprises a free end inclined in the direction contrary to its initial inclined section to facilitate the insertion of the contact plate -9-.

As can be seen in figures 16 and 17, one of the conductive tapes corresponding to the positive end of the series of photovoltaic cells is directly connectable to terminal -6- of connection of a positive connection cable -7 (+) - that comes out of the junction box, while the another conductive tape corresponding to the positive end of The series of photovoltaic cells is connectable to the terminal of connections -6- neighbor. In turn, one of the tapes conductors corresponding to the negative end of the series of photovoltaic cells is connectable to the terminal of connection -6- of a connection cable -7 (-) - negative coming out of the junction box while the other tape conductor corresponding to the negative end of the series of photovoltaic cells is connectable to the terminal connections -6- neighbor. The connection terminals -6- are in turn connected to each other through respective protection diodes -11- whose respective poles -11a- are inserted in the incoming -6f- or -6g- of the connection terminals -6-. So, the poles -11a- of the protection diode that interconnects the two connection terminals -6- connectable to the tapes of the positive end of the series of photovoltaic cells is inserted in the second retention inlet -6g- of each one of these connection terminals -6-, the poles -11a- of the protection diode that interconnects the two terminals of connection -6- connectable to the negative end tape of

the series of photovoltaic cells are inserted in the second retention incoming -6g- of each of these connection terminals -6-, and poles -11a- of the diode intermediate protection -11-are inserted in the 5 respective first retention inlets -6f- of the two connection terminals -6- which are neighbors respectively to the connection terminals -6- directly connected to the connection cables -7-. Through this interconnection of protection diodes -11- intermediate connections are formed to

10 bypass mode. This provision to "tresbolillo" allows use -6-identical connection terminals and save space inside the junction box.

fifteen

Claims (21)

1. Junction box, particularly for installations photovoltaic in which connection terminals are housed (6) metallic to connect a plurality of conductive tapes

(8)

 to a plurality of connection cables (7) with respective souls (7a) that enter the junction box through respective inlet ducts (10), comprising a piece of support (1) having an upper face (1f), and a body terminal holder (2) having a lower face (2a), being said faces (1f, 2a) distanced from each other by a wall peripheral (1b, 2b, 2c) surrounding at least one input (1e) for conductive tapes (8) and connection terminals

(6)

 for the connection cables (7), the housing being connections characterized by that

the support piece (1) is mountable on a plate photovoltaic and comprising the at least one input (1e) for the conductive tapes (8), and connection elements (9) arranged on the upper face (1f) of the support piece (1) to connect each conductive tape (8) to the support piece (1), each connecting element (9) being a plate of metal contact (9) arranged transversely with respect to to the inlet ducts (10); the terminal holder body (2) is attachable to the part of support (1) by means of a coupling system (5) and that comprises the lower face (2a) facing the piece of support (1) and an upper cover (3); the input conduits (10) for the connection cables (7) are located between the terminal holder body (2) and the top cover (3) and cross a first side of the wall peripheral (1b, 2b, 2c) of the terminal holder body (2), where each of the inlet ducts (10) is formed by a bottom (10a) that emerges horizontally from one side of the outer perimeter wall (2c) of the terminal holder body (2), and a complementary upper part (10b) that emerges horizontally on the same side of the top cover (3) thus forming an axial passage for the connection cable (7) correspondent; the connection terminals (6) are fixed to the face bottom (2a) of the terminal holder body (2) in positions axially parallel to each other and with respect to the ducts input (10), in which contact elements (6j) of the respective connection terminals (6) match the respective connection elements (9) of the support piece (1), each connection terminal (6) being connectable to a connecting cable (7) arranged in axial alignment with the corresponding inlet duct (10); where each connection terminal (6) comprises a first extreme part (6b) located between two centering partitions (2e) emerging from the inner face (2a) of the portal body terminals (2) in the proximity to the side of the peripheral wall (1b, 2b, 2c), and a second extreme part (6m) comprising the contact element (6j) connected to one of the elements connection (9) emerging from the upper face of the workpiece support (1), and where each connection terminal (6) comprises two side walls (6c) parallel and spaced from each other, and joined superiorly by an upper base (6a), which extend between said first extreme part (6b) and said second end part (6m) of the connection terminal; of the lower surface (2a) of the body terminal holder (2) emerges at least one support partition (2f, 2h) against which the upper base (6a) of the terminal rests connection (6); each of the side walls (6c) comprises a first section neighboring said first extreme part (6b) of the connection terminal (6), a second section neighboring said second end part (6m) of the connection terminal (6) and a intermediate section located between said first and said second section of the side wall (6c); the side walls (6c) comprise respective edges lower provided with two incoming immobilization (6e), in which respective heads of respective fit facing vertical retention tabs (2i) emerging from the lower face (2a) of the terminal holder body; and where the contact element (6j) of each terminal of connection (6) comprises at least two transverse tabs of elastically flexible contact (6j, 6j ') disposed of such so that they are susceptible to imprison the plate of contact (9) with each other; the contact elements (6j) being removably connected to the respective connection elements (9) of so that when the terminal holder body (2) is removed from the support piece (1), the contact elements (6j) are decouple the connection elements (9).

2.

Junction box, according to claim 1, characterized in that the coupling system (5) comprises

a pair of coupling partitions (16) that extend up opposite sides of the piece of support (1) and a pair of coupling flanges (17) that extend down from opposite sides of the body

3.

Junction box, according to claim 1, characterized in that the coupling system (5) comprises

terminal holder

 (2) from such shape that every  partition from

coupling

(16) be dock  to a from the flanges from

coupling (17) by embedded.

a pair of coupling partitions (16) that extend down from opposite sides of the body terminal holder (2) and a pair of coupling flanges (17) that extend upward from opposite sides of the

piece

 from  support (1)  from  such shape  that  every  partition  from

coupling

(16) be dock to  a from the  flanges from

coupling (17) by embedded.

4. Junction box according to claim 1, 2 or 3, characterized by that the support piece (1) comprises a base plate (1a) in which is the upper face (1f) of the piece of support (1); the peripheral wall (1b, 2b, 2c) comprises a partition exterior (1b) that emerges superiorly from the upper face (1f) of the base plate (1a) and an external perimeter wall (2c) that emerges inferiorly and peripherally from the body terminal holder (2) and which is sized to hug externally the outer partition (1b) of the support piece (one).

5.

Junction box, according to claim 4, characterized by the peripheral wall (1b, 2b, 2c) it also comprises an internal perimeter wall (2b) parallel to the outer perimeter wall (2c), so that the partition outside (1b) of the support piece (1) is arranged between the outer perimeter wall (2c) and the inner perimeter wall (2b) of the terminal holder body (2).

6.

Junction box, according to claim 5, characterized in that the outer perimeter wall (2c) and the internal perimeter wall (2b) emerge inferiorly from a wing horizontal (2d) surrounding the lower face (2a) of the body terminal holder (2).

7.

Junction box according to any one of the

claims 4 to 6, characterized in that between the wall external perimeter (2c) of the terminal holder body (2) and the outer partition (1b) of the support piece (1) is an o-ring (4) is provided for sealing.

8.

Junction box, according to claim 7, characterized in that the o-ring (4) is embedded in a outer seat (1c) of the outer partition (1b).

9.

Junction box, according to any one of the preceding claims, characterized in that each contact plate (9) is immobilized between two partitions of immobilization (1d) that emerge inferiorly from the face top (1f) of the support piece (1).

10.

Junction box, according to claim 9, characterized in that the immobilization partitions are grooved partitions that have two grooves in which fit respective vertical edges of the plate contact (9).

eleven.

Junction box, according to any one of the preceding claims, characterized in that the Vertical immobilization inlets (6e) are provided in the lower edges of said second sections of the walls lateral (6c).

12.

Junction box, according to any one of the preceding claims, characterized in that

each connection terminal (6) comprises a bridge bottom (6h) with a horizontal central part attached to the lower edges of the intermediate sections of the walls lateral (6c); the lower bridge (6h) comprises a first wing flexible inclined towards the upper base (6a) of the terminal connection (6) in the direction of said first extreme part (6b) and arranged between said first sections of the walls lateral (6c), and a second flexible wing inclined towards the upper base (6a) of the connection terminal (6) in the direction made said second extreme part (6m) and arranged between said second sections of the side walls (6c); the first sections of the side walls (6c) they comprise both first retention inlets (6f) facing each other that extend from their respective edges lower towards the upper base (6a) of the terminal connection (6), comprising each first retention inlet (6f) a final stretch widened towards the first extreme part (6b) of the connection terminal (6); the second sections of the side walls (6c) They comprise two incoming seconds of retention (6g) facing each other that extend from their respective edges lower towards the upper base (6a) of the terminal connection (6), comprising every second retention incoming (6g) a final stretch widened towards the second extreme part (6m) of the connection terminal (6); each retention inlet (6f, 6g) is sized to allow the insertion of a pole (11a) of a component electronic (11) from the respective lower edge of the corresponding side wall (6c); each of the flexible wings comprises an extreme section curved retention (6i) that extends between the sections widened ends of retention recesses (6f, 6g) facing each other, so that the extreme retention section (6i) is capable of pushing the pole (11a) of the component electronic (11) towards said widened end sections of retention inlets (6f, 6g).

13.

Junction box, according to claim 12, characterized in that the connection terminals (6) are arranged so that the first retention inlets (6f) of a connection terminal (6) are aligned with the first retention inlets (6f) of at least one terminal connection (6) neighbor, and the second incoming retention (6g) are aligned with the second incoming retention (6g) of at least one connection terminal (6) neighbor.

14.

 Junction box according to claim 12 or 13, characterized in that the lower bridge (6h) comprises, seen axially of the connection terminal (6), two halves separated by an axial groove.

fifteen.

Junction box, according to any one of the

previous claims, characterized in that the second extreme part (6m) of the connection terminal (6) comprises a U-shaped end wall (6m) with wings laterals that emerge from the respective lateral walls (6c) and with a central part away from the side walls (6c); the extreme wall (6m) surrounds at least part of a distal recess (6l) at the upper base (6a) of the terminal connection (6); at least the central part of the extreme wall (6m) fits in a retention pocket (2j) that emerges from the lower face (2a) of the terminal holder body (2); the transverse contact tabs (6j, 6j ') they comprise a first transverse contact tongue (6j) extending downward from the upper base (6a) of the connection terminal (6) and at least a second tab transverse contact (6j ') extending downward from the central part of the extreme wall (6m); the transverse contact tabs (6j, 6j ') comprise respective initial sections inclined one towards other, so that they contact each other in an area of contact when the contact plate (9) is not inserted between the transverse contact tabs (6j, 6j '), and where the contact plate (9) is imprisoned when it is inserted between the transverse contact tabs (6j, 6j ’).

16.

Junction box, according to claim 15, characterized in that each transverse contact tab (6j, 6j ') comprises a free end inclined in the direction contrary to its initial inclined section to facilitate the insertion of the contact plate (9).

17.

 Junction box, according to claim 15 or 16, characterized by the central part of the extreme wall (6m) comprises two wall parts separated from each other by a vertical groove, and why the wall parts emerge second contact tabs (6j ').

18.

Junction box, according to any one of the claims 12 to 17, characterized in that the base upper (6a) of each connection terminal (6) comprises a proximal recess (6k) located above the lower bridge (6h), comprising a proximal transverse edge the first extreme part (6b) of the connection terminal (6), in the that hooks the head of an anchor column (2g) corresponding of a plurality of anchor columns (2g) emerging from the lower base (2a) of the body terminal holder (2).

19.

Junction box, according to any one of the preceding claims, characterized in that the first end portion (6b) of at least each connection terminal (6) connectable to a connection cable (7) comprises at least one

5 crimping wing capable of imprisoning the soul (7a) of the corresponding connection cable (7). 20. Junction box, according to any one of the preceding claims, characterized in that the lid Top 10 (3) of the terminal holder body (2) is removable from the terminal body (2). 21. Junction box, according to any one of the preceding claims, characterized in that the lid 15 upper (3) of the terminal holder body (2) is integral with the terminal body (2).