CN201523195U

CN201523195U - Solar junction box

Info

Publication number: CN201523195U
Application number: CN2009200493944U
Authority: CN
Inventors: 吕纪坤
Original assignee: Changzhou Jiuding Automobile Co Ltd
Current assignee: Changzhou Jiuding Automobile Co Ltd
Priority date: 2009-10-22
Filing date: 2009-10-22
Publication date: 2010-07-07
Anticipated expiration: 2019-10-22

Abstract

The utility model discloses a solar junction box which comprises a casing and an upper cover; at least two junction devices are arranged in the casing; the two adjacent junction devices are electrically connected through a diode; an inner circular arc surface which is bonded with the outer surface on the upper side of the diode after the upper cover is fastened with the casing is formed on the inner surface of the upper cover; each junction device comprises a wire holder, as well as a metal connecting piece, a folding spring and a coil spring which are arranged on the wire holder; a conductive tin belt of the solar panel can be arranged between the metal connecting piece and the folding spring and can be compressed through elastic force of the folding spring; a convex circular arc surface allowing a pedestal of the diode to be inserted in is formed on the side surface of the metal connecting piece and can be compressed through the coil spring; and the metal connecting piece is arranged at the output ends of the junction devices and is provided with a cylindrical hole allowing an external wiring contact pin to be inserted in. The utility model has the advantages of good heat dissipation performance, high electrical conductivity and reliable operation; heat generated by the diode can be directly conveyed to the aluminium alloy upper cover with good thermal conductivity; and conductors are connected through the contact of planes or cylindrical surfaces, thereby improving the contact area.

Description

Solar junction box

Technical field

The utility model relates to the solar power system connector assembly, especially a kind of solar junction box.

Background technology

At present, the case material of the used terminal box of solar power system generally uses engineering plastics to make on the market, connected mode between the conductor mainly is that contact is fixed, the terminal box of this structure, the following defective of ubiquity: at first, terminal box in working order down, the diode of enclosure interior can produce a large amount of heat energy, heat is passed to housing by air transmitted in the housing and convection current, housing is again by conducting heat release, but because the heat conductivility of air and plastics is poor, heat in the housing can not in time discharge, and has caused the temperature in the housing constantly to raise, and makes diode be in for a long time to work high temperature under and has reduced useful life, too high temperature has also been quickened the distortion of housing and has been worn out simultaneously, has shortened the useful life of product; Secondly, the contact site between conductor connects generally adopts shell fragment to contact with prominent point, and such structure makes the contact form between the conductor be the some contact, and the contact site area is too little, has increased resistance, has reduced the efficiency of transmission of product to electric energy; At last for high-power terminal box, the metalwork that is used to conduct electricity in the housing expose and also metalwork between distance less, cause the electric discharge phenomena between the element easily, damaged diode and also reduced reliability of products.

The utility model content

The technical problems to be solved in the utility model is: overcome the deficiency in the prior art, the solar junction box of a kind of perfect heat-dissipating, conductance height, reliable operation is provided.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of solar junction box, comprise housing and loam cake, loam cake is fastened on the housing, last exterior surface is provided with fin, at least be provided with two terminations in the housing, electrically connect by diode between adjacent two terminations, the input of termination and solar panel electrically connect, output electrically connects with the Wiring port that is located at housing one side, described upper interior surface has the inner arc surface that fits with the diode outer surface after loam cake is fastened on housing, described termination comprises the junction block of being located on the housing, junction block is provided with metal connecting piece, folding spring and wind spring, the conduction tin band of solar panel can place the plane contact that realizes between metal connecting piece and the folding spring with metal connecting piece, and can will conduct electricity the tin band by the elastic force of folding spring self and compress, the metal connecting piece side has can be for the outer convex arc surface of diode suspension column insertion, and can the diode suspension column be pressed on the medial surface of outer convex arc surface by wind spring, metal connecting piece is positioned at the termination output and has the cylindrical hole that can supply the external cabling contact pin to insert.

For guaranteeing the installation firm stable of diode, the heat that the diode that leaves sooner produces, be positioned at the diode below in the described housing and be provided with holder, holder is provided with carriage, described carriage have with diode under side external surface fit and can support the carriage circular arc of diode, the while carriage also has goes up curved plane, fits with the upper interior surface plane after loam cake is fastened on the housing in described curved plane.

For realizing the plane contact of conduction tin band and metal connecting piece, the input end that described metal connecting piece is positioned at termination has the upwards perpendicular of bending, the end of perpendicular has the circular arc bending, a side of perpendicular and folding spring plane contact, and opposite side contacts with folding spring circular arc.

Further, for preventing to produce electric discharge phenomena between the metallic conductor and loam cake in the termination, described termination also comprises the insulation cover plate that is placed on the junction block.

Furtherly, described termination further comprises the guide vane end stop on the cylindrical hole head extended surface that is sleeved on metal connecting piece, and guide vane end stop is provided with can the fastening holding screw that inserts the wiring contact pin in the cylindrical hole from Wiring port.

For improving radiating effect, described loam cake and fin integrative-structure for adopting aluminum alloy materials to make, fin shape triangular in shape, it is evenly distributed on the outer surface of loam cake, and the end that area of dissipation is big is positioned at the top of termination one side, and it is consistent with cross-ventilated direction that direction is set.

Sealing property when using for improving terminal box, described housing is provided with annular groove, is provided with sealing ring in the annular groove, and loam cake is fastened in the annular groove and by hasp and is connected with housing.

For guaranteeing the dependability of diode, be filled with the insulation silica gel that can eliminate electric discharge phenomena in the described diode suspension column bent angle groove, be with flexible insulated hose on the suspension column that diode exposes.

The beneficial effects of the utility model are: the utility model has adopted the diode upper outside surfaces and upper interior surface fits, side external surface and the carriage circular arc portion fits and the curved plane of going up of carriage is fastened on the structure that on the housing fit in back and loam cake plane at loam cake under the diode, the heat that diode is produced can be directly passed to the good aluminium alloy loam cake of thermal conductivity, and by on the fin that covers distribute fast, guarantee the interior temperature control of housing in the reasonable scope, thereby guaranteed the stability and the useful life of diode; The plane contact mode that is connected to of the conduction tin band of solar panel and termination input, being connected between diode and the termination, between the wiring contact pin of output and the termination is the face of cylinder way of contact, thereby increased the contact area between the conductor, reduce contact resistance, improved the efficiency of transmission of electric energy; Adopt the insulation cover plate capping on the junction block simultaneously, the embedding of insulation silica gel is adopted in diode suspension column corner, is with flexible insulated hose on the suspension column that diode exposes, and the electric discharge phenomena between the conductor have been avoided in these measures effectively.

Description of drawings

Below in conjunction with drawings and embodiments the utility model is further specified.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A sectional structure schematic diagram among Fig. 1.

Fig. 3 is the B-B sectional structure schematic diagram among Fig. 1.

Fig. 4 is the C-C sectional structure schematic diagram among Fig. 1.

Curved plane 9. quadrangulars on 1. housings, 11. annular grooves, 12. wedges, 2. loam cakes, 21. fin, 22. inner arc surfaces, 3. terminations, 31. junction blocks, 32. metal connecting pieces, 33. folding springs, 34. wind springs, 35. insulation cover plates, 36. guide vane end stops, 37. holding screws, 4. diodes, 5. Wiring ports, 6. sealing rings, 7. holders, 8. carriages, the 81. carriage circular arcs 82. among the figure

Embodiment

In conjunction with the accompanying drawings the utility model is further described now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.

As Fig. 1～a kind of junction box for solar energy system shown in Figure 4, comprise housing 1 and loam cake 2, housing 1 is provided with annular groove 11, be provided with sealing ring 6 in the annular groove 11, loam cake 2 is fastened in the annular groove 11 and by hasp and is connected with housing 1, parallel is shown four terminations 3 in the housing 1, electrically connect by two diodes 4 between adjacent two terminations 3, the input of termination 3 and solar panel electrically connect, output electrically connects with the lead-in that passes the Wiring port 5 that is located at housing 1 one sides, has the inner arc surface 22 that after loam cake 2 is fastened on housing 1, fits on described loam cake 2 inner surfaces with diode 4 outer surfaces, after loam cake 2 is fastened on the housing 1, the outer surface of diode 4 just is adjacent to the inner arc surface 22 of loam cake 2 inner surfaces and contacts, be positioned at diode 4 belows in the housing 1 and be provided with holder 7, holder 7 is provided with carriage 8, described carriage 8 has and fits with 4 times side external surfaces of diode and can support the carriage circular arc 81 of diode 4, carriage 8 also has upward curved plane 82 simultaneously, described curved plane 82 is fastened on back and the applying of loam cake 2 inner surface planes on the housing 1 at loam cake 2, be provided with 15 fin 21 that are structure as a whole with loam cake 2 at loam cake 2 outer surfaces, 15 fin 21 evenly distribute on the outer surface of loam cake 2, every fin 21 shape all triangular in shape, and the big end of its area of dissipation is positioned at the top of termination 3 one sides, that is to say top, diode 4 installation sites, simultaneously fin 21 that direction is set is consistent with cross-ventilated direction, because loam cake 2 and fin 21 all adopt the good aluminium alloy of heat-transfer effect to make, most of heat of diode 4 generations is directly passed to loam cake 2 by the inner arc surface 22 of loam cake 2 inner surfaces on the one hand so in the course of the work, can pass to loam cake 2 by carriage 8 on the other hand, distribute fast by fin 21, avoid relying on fully the transfer of air of inefficiency, make the outside transmission of heat in the housing 1 more direct, the rapid release that helps heat, guarantee that the temperature in the housing 1 is controlled within the zone of reasonableness, to improve diode 4 conditions of work, guarantee the stability and the useful life of diode 4, also help simultaneously delaying the aging of the used plastic products of terminal box, reduce the distortion of plastic.

Described termination 3 comprises junction block 31 that is located on the housing 1 and is structure as a whole with housing 1 and the metal connecting piece 32 that is used for the conducting electric current, metal connecting piece 32 is located on the junction block 31, by the sidewall of junction block 31 and quadrangulars 9 location that are positioned at junction block 31 centres, termination 3 also comprises folding spring 33, wind spring 34 and can prevent in the termination 3 insulation cover plate 35 of generation electric discharge phenomena between the metallic conductors and loam cake 2, be positioned at junction block 31 centre positions in housing 1 bottom and have two wedges 12, the input end that described metal connecting piece 32 is positioned at termination 3 has the upwards perpendicular of bending, the end of perpendicular has the circular arc bending, one side of perpendicular and folding spring 33 plane contact, opposite side contacts with folding spring 33 circular arcs, after the conduction tin band of solar panel inserts the perpendicular place that places folding spring 33 and metal connecting piece 32, can compress in the circular arc contact position of metal connecting piece 32 by the recovery elastic force of folding spring 33 with folding spring 33, solar panel conducts electricity the tin band with plane contact mode thereto, thereby has reduced conduction resistance; Wind spring 34 is in the groove that inserts in the middle of the metal connecting piece 32, cover behind junction block 31 at insulation cover plate 35, it is downward that insulation cover plate 35 can be oppressed wind spring 34, be subjected to the effect of two wedges 12 in housing 1 bottom and strut to two side directions, add the elastic force of wind spring 34 self, make wind spring 34 sideways tension force can vertically point to the sidewall of metal connecting piece 32 equably, being respectively equipped with in the side of metal connecting piece 32 can be for the outer convex arc surface of diode 4 suspension columns insertion, after diode 4 suspension columns insert, rely on the elastic force of wind spring 34, diode 4 suspension columns can be pressed in the outer convex arc surface of metal connecting piece 32 both sides respectively, thereby realize that diode 4 contacts with the face of cylinder of metal connecting piece 32, increase contact area, improved the efficiency of transmission of electric energy.

The output end position that metal connecting piece 32 is positioned at termination 3 also has a cylindrical hole, can insert with output current for external wiring contact pin, the output of two terminations 3 of the left and right sides in four terminations 3, metal connecting piece 32 is set with guide vane end stop 36 on the head extended surface of cylindrical hole, after external wiring contact pin inserts cylindrical hole by Wiring port 5, can be fastening in addition by the holding screw 37 that is located on the guide vane end stop 36, after above-mentioned all parts of termination 3 install, on junction block 31, cover insulation cover plate 35, insert diode 4, to prevent the electric discharge phenomena of generation between metallic conductor and the loam cake 2 in the termination 3, simultaneously in diode 4 suspension column bent angle grooves, be filled with the insulation silica gel that to eliminate electric discharge phenomena, be with flexible insulated hose on the suspension column that diode 4 exposes, to guarantee the dependability of diode 4.

The utility model operation principle is: after the conduction tin band of solar panel is introduced from the square hole of housing 1 bottom, fix between the metal connecting piece 32 of insertion termination 3 and the folding spring 33 and by the recovery elastic compression of folding spring 33, form plane contact, improve the electric energy transmitting ability to increase contact area, cell panel forms relation in parallel with diode 4, when the external wiring contact pin of output current inserts in the cylindrical hole of metal connecting pieces 32 by Wiring port 5, on the pressing of insulation cover plate 35 is arranged, have holding screw 37 on spacing fast 36 to carry out secondary compression simultaneously and fix.When all cell panels during all by fully irradiation and normal produce power, diode 4 is partially anti-, and electric current flows through through each cell panel; When reducing, certain cell panel open circuit or the electric current that flows through this Battery pack plate cause this cell panel anti-partially the time, diode connected in parallel 4 becomes positively biased and conducting with it, electric current then flows through through diode 4, walks around the cell panel of irregular working, thereby prevents the damage of whole battery group.

With above-mentioned foundation execution mode of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from the utility model technological thought.Technical scope of the present utility model is not limited to the content on the specification, must determine its technical scope according to the claim scope.

Claims

1. solar junction box, comprise housing (1) and be fastened on loam cake (2) on the housing (1), loam cake (2) outer surface is provided with fin (21), at least be provided with two terminations (3) in the housing (1), electrically connect by diode (4) between adjacent two terminations (3), the input of termination (3) and solar panel electrically connect, output electrically connects with the Wiring port (5) that is located at housing (1) one side, it is characterized in that: described loam cake (2) inner surface has the inner arc surface (22) that fits with diode (4) upper outside surfaces after loam cake (2) is fastened on housing (1), described termination (3) comprises the junction block of being located on the housing (1) (31), junction block (31) is provided with metal connecting piece (32), folding spring (33) and wind spring (34), the conduction tin band of solar panel can place the plane contact that realizes between metal connecting piece (32) and the folding spring (33) with metal connecting piece (32), and can will conduct electricity the tin band by self elastic force of folding spring (33) and compress, metal connecting piece (32) side has the outer convex arc surface that can supply diode (4) suspension column to insert, and can diode (4) suspension column be pressed on the medial surface of outer convex arc surface by wind spring (34), metal connecting piece (32) is positioned at termination (3) output and has the cylindrical hole that can supply the external cabling contact pin to insert.

2. junction box for solar energy system according to claim 1, it is characterized in that: be positioned at diode (4) below in the described housing (1) and be provided with holder (7), holder (7) is provided with carriage (8), described carriage (8) has and the following side external surface of diode (4) fits also can support the carriage circular arc (81) of diode (4), while carriage (8) also has goes up curved plane (82), and described curved plane (82) is fastened on housing (1) upward back and the applying of loam cake (2) inner surface plane at loam cake (2).

3. junction box for solar energy system according to claim 1, it is characterized in that: the input end that described metal connecting piece (32) is positioned at termination (3) has the upwards perpendicular of bending, the end of perpendicular has the circular arc bending, one side of perpendicular and folding spring (33) plane contact, opposite side contacts with folding spring (33) circular arc.

4. solar junction box according to claim 1 is characterized in that: described termination (3) also comprises and is placed on the insulation cover plate (35) that prevents between interior metallic conductor of termination (3) and the loam cake (2) to produce electric discharge phenomena on the junction block (31).

5. junction box for solar energy system according to claim 1, it is characterized in that: described termination (3) further comprises the guide vane end stop (36) on the cylindrical hole head extended surface that is sleeved on metal connecting piece (32), and guide vane end stop (36) is provided with can the fastening holding screw (37) that inserts the wiring contact pin in the cylindrical hole from Wiring port (5).

6. solar junction box according to claim 1, it is characterized in that: described loam cake (2) and fin (21) integrative-structure for adopting aluminum alloy materials to make, fin (21) shape triangular in shape, it is evenly distributed on the outer surface of loam cake (2), and the end that area of dissipation is big is positioned at the top of termination (3) one sides, and it is consistent with cross-ventilated direction that direction is set.

7. solar junction box according to claim 1, it is characterized in that: described housing (1) is provided with annular groove (11), be provided with sealing ring (6) in the annular groove (11), loam cake (2) is fastened in the annular groove (11) and by hasp and is connected with housing (1).

8. solar junction box according to claim 1 is characterized in that: be filled with the insulation silica gel that can eliminate electric discharge phenomena in described diode (4) the suspension column bent angle groove, be with flexible insulated hose on the suspension column that diode (4) exposes.