CN201689900U

CN201689900U - Solar cell junction box

Info

Publication number: CN201689900U
Application number: CN2010202098213U
Authority: CN
Inventors: 吕纪坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-28
Filing date: 2010-05-28
Publication date: 2010-12-29
Anticipated expiration: 2020-05-28

Abstract

The utility model discloses a solar cell junction box, which comprises a base and an upper cover covered on the base. A radiating fin is arranged on the outer surface of the upper cover, at least two wire connection devices are arranged inside the base and electrically connected with each other by the aid of a diode, a thermal conductive silica gel pad arranged on the inner surface of the upper cover is provided with a semicircular arc surface fit with a circular arc on the outer surface of the diode, and the semicircular arc surface is attached to the outer surface of the diode after the upper cover is covered on the base. Each wire connection device comprises a metal connecting part provided with a horizontal inward concave arc surface, pins of the diode are horizontally arranged inside the inward concave arc surface of the metal connecting part, one end of the metal connecting part can be connected into a bus bar of a solar cell component, and the other end of the metal connecting part is connected with a wire connecting terminal capable of being connected into a photovoltaic cable. The solar cell junction box solves the problems of poorer integral heat dissipation effect, low electric conductivity among conductors and lower working stability of a junction box currently used by a solar power generation system.

Description

Solar battery connecting box

Technical field

The utility model relates to the solar module technical field, especially a kind of solar battery connecting box.

Background technology

At present, the loam cake of the used terminal box of solar power system and the material of base generally use engineering plastics 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, the heat in the housing can not in time discharge, and has caused the temperature in the housing constantly to raise, the operational environment of high temperature makes the energising ability of diode sharply descend, reduce the generating efficiency of solar components, shortened the working life of diode, also increased the frequency of maintenance of assembly; 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; Last diode generally be will insert after the bending pins earlier in the jack of junction block or to be welded on the junction block when mounted with pin, in the process that pin is bent because pin will be subjected to the tension of both sides, destroy the structure of inside chip easily, and also can cause the reduction of original diode behavior to the welding of diode pin.

The utility model content

The technical problems to be solved in the utility model is: overcome the deficiency in the prior art, provide a kind of solar battery connecting box, the problem that solve that the integral heat sink effect that the used terminal box of present solar power system exists is relatively poor, conductance is not high, job stability is lower between the conductor.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of solar battery connecting box, comprise base and the loam cake that covers on base, last exterior surface has fin, at least be provided with two terminations in the base, electrically connect by diode between adjacent two terminations, described upper interior surface is provided with the thermal conductive silicon rubber cushion, the heat conductive silica gel spacer has the semicircle cambered surface that matches with diode outer surface circular arc, after loam cake is placed on the base, this semicircle cambered surface and diode outer surface fit, described termination comprises the metal connecting piece with horizontal inner concave arc surface, the pin level of diode places in the inner concave arc surface of metal connecting piece, metal connecting piece one end can insert the busbar of solar module, and the other end is connected with the binding post that can insert the photovoltaic cable.

Specifically, described termination comprises junction block, be placed on the insulation cover plate on the junction block, folding spring and wind spring, metal connecting piece is fastened on the junction block, metal connecting piece is positioned at the busbar incoming end and has the upwards perpendicular of bending, the perpendicular end has the circular arc bending, the perpendicular middle part has the section of bending inwards, this section of bending inwards is passed the through hole at folding spring middle part will roll over the medial surface that spring is fastened on perpendicular, the top ends of folding spring has the arc bending segment, lateral surface and elastic compression that the arc bending segment is positioned at perpendicular bend in the circular arc of perpendicular end, wind spring is located at the medium position of metal connecting piece, insulation cover plate covers after on the junction block and presses down wind spring, and the bottom surface of wind spring is pressed on the pin of diode in the inner concave arc surface of metal connecting piece.

Fixed for guaranteeing the thermal conductive silicon rubber cushion, described upper interior surface is fixed with the loam cake liner, the loam cake liner compresses the thermal conductive silicon rubber cushion and is fitted in upper interior surface, and the loam cake liner is positioned at insulation cover plate top to have at loam cake and build the boss that suppresses insulation cover plate after on the base.

The heat circulation that produces for ease of diode and distributing by loam cake has formed the circulation canal of air flows after the overall fixed installation between the medial surface of the lateral surface of described loam cake liner and base and loam cake.

Sealing property when using for improving terminal box, plane annular is provided with sealed groove on the described base, is placed with sealing ring in the sealed groove, and loam cake compresses sealing ring after being placed on the base.

For improving radiating effect, described loam cake and fin are for adopting the integrative-structure of aluminium alloy making, and fin is the evagination circular shape, are distributed on the outer surface of loam cake, and the part that its area of dissipation is big is positioned at the diode top.

The beneficial effects of the utility model are: the utility model is provided with the thermal conductive silicon rubber cushion between diode and loam cake, being provided with simultaneously can be for the circulation canal of air flows, a heat part that produces when making diode operation can pass to the loam cake upper surface fast by the thermal conductive silicon rubber cushion and distribute, another part flows by circulation canal and is directly delivered to upper interior surface and distributes, improved the heat dispersion of terminal box thus, guarantee terminal box internal temperature may command in the reasonable scope, the job stability and the useful life of diode have been guaranteed, and plane or the face of cylinder contact that is connected between the conductor connects, help reducing contact resistance, improve the contact area between the conductor, thereby the whole electric energy transmitting efficient that has improved terminal box, the pin of last diode has prevented that without bending and welding and direct horizontal positioned the structure of diode inside chip from being damaged.

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 an A-A cutaway view among Fig. 1.

Fig. 3 is a B-B cutaway view among Fig. 1.

Fig. 4 is a C-C cutaway view among Fig. 1.

Fig. 5 is the partial enlarged drawing at D place among Fig. 4.

1. bases, 11. sealed grooves, 2. loam cakes, 21. fin, 3. terminations, 31. metal connecting pieces, 311. inner concave arc surfaces, 312. perpendiculars, 313. circular arcs bending, 314. sections of bending inwards, 32. junction blocks, 33. insulation cover plates, 34. folding springs, 341. through holes, 342. arc bending segments, 35. wind springs, 4. diodes, 5. thermal conductive silicon rubber cushions, 51. semicircle cambered surfaces, 6. binding posts, 7. loam cake liners, 71. boss, 8. circulation canals, 9. sealing rings, 10. bolts among the figure

Embodiment.

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

As Fig. 1～solar battery connecting box shown in Figure 5, comprise base 1 and the loam cake 2 that covers on base 1, plane annular is provided with sealed groove 11 on the base 1, be placed with sealing ring 9 in the sealed groove 11, after loam cake 2 is placed on and fixes on the base 1, loam cake 2 surroundings embed and compress sealing ring 9 after lock by bolt 10 sealed groove 11 backs, sealing property in the time of can improving the terminal box use preferably, be provided with four terminations that are arranged in parallel 3 in the base 1, the input of termination 3 electrically connects the busbar of solar module, output electrically connects the photovoltaic cable, electrically connects by a diode 4 between adjacent two terminations 3; Loam cake 2 outer surfaces have with loam cake 2 and are structure as a whole, the fin 21 that adopts aluminum alloy materials to make, fin 21 is the evagination circular shape, and be distributed on the outer surface of loam cake 2, the part that fin 21 area of dissipations are big is positioned at the most concentrated position of heat, diode 4 top, simultaneously fin 21 that direction is set is consistent with cross-ventilated direction, inner surface at loam cake 2 is provided with loam cake liner 7 and thermal conductive silicon rubber cushion 5, loam cake liner 7 is fixed on behind loam cake 2 inner surfaces thermal conductive silicon rubber cushion 5 compressed and is fitted in loam cake 2 inner surfaces, thermal conductive silicon rubber cushion 5 has the semicircle cambered surface 51 that matches with diode 4 outer surface circular arcs, after loam cake 2 is placed on the base 1, the outer convex surface of this semicircle cambered surface 51 contacts with the cancave cambered surface cooperation of loam cake 2 inner surfaces, and the inner concave of this semicircle cambered surface 51 is just in time fitted with diode 4 outer round surface and contacted; The heat circulation that produces for ease of diode 4 and distributing by loam cake 2, between the medial surface of the lateral surface of loam cake liner 7 and base 1 and loam cake 2, after the installation of terminal box overall fixed, form the circulation canal 8 of an air flows, when diode 4 has electric current to pass through, the a part of heat that produces directly passes to loam cake 2 backs by thermal conductive silicon rubber cushion 5 and discharges, another part heat causes temperature to raise in base 1 inside, entering circulation canal 8 after hot-air rises flows, loam cake 2 inwalls that run into low temperature then begin to cool down, temperature reduces toward current downflow, flow into the inside of base 1 after continuing to cool off again, by the circulation that goes round and begins again like this heat is constantly passed, like this, the heat that has produced when having guaranteed diode 4 work both can pass to loam cake 2 and distributed fast by fin 21 by thermal conductive silicon rubber cushion 5, also can be through the internal temperature that reduces terminal box that circulates of air, the air heat conduction of avoiding relying on inefficiency is fully transmitted, make the outside transmission of heat in the base 1 more direct, the rapid release that helps heat, guarantee that the temperature in the base 1 is controlled within the zone of reasonableness, to improve diode 4 conditions of work, guarantee the job 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 the junction block 32 that is located in the base 1; the metal connecting piece 31 that is used for the conducting electric current; be placed on the insulation cover plate 33 on the junction block 32; folding spring 34 and wind spring 35; metal connecting piece 31 is fastened on the junction block 32; metal connecting piece 31 has horizontal inner concave arc surface 311; the pin of diode 4 is without bending and welding and level places in this inner concave arc surface 311; can protect diode 4 inside chip structures injury-free effectively; one end of metal connecting piece 31 can insert the busbar of solar module; the other end is connected with the binding post 6 that can insert the photovoltaic cable; binding post 6 one ends are fixed on the wiring plane on the metal connecting piece 31 head extended surfaces by tapping screw; the other end is that U-shaped is dehisced; be used to pack tightly the photovoltaic cable that is connected; metal connecting piece 31 is positioned at the busbar incoming end and has the upwards perpendicular 312 of bending; perpendicular 312 ends have circular arc bending 313; perpendicular 312 middle parts have the section of bending inwards 314; this section of bending inwards 314 is passed the through hole 341 at folding spring 34 middle parts will roll over the medial surface that spring 34 is fastened on perpendicular 312; the top ends of folding spring 34 has arc bending segment 342; lateral surface and elastic compression that arc bending segment 342 is positioned at perpendicular 312 bend on 313 in the circular arc of perpendicular 312 ends; after inserting, the busbar of solar module is clamped between arc bending segment 342 and the circular arc bending 313; wind spring 35 is located at the medium position of metal connecting piece 31; the loam cake liner 7 that is positioned at insulation cover plate 33 tops has boss 71; cover at loam cake 2 that this boss 71 suppresses insulation cover plate 33 after on the base 1; then insulation cover plate 33 presses down wind spring 35; the bottom surface of wind spring 35 is pressed on the pin of diode 4 in the inner concave arc surface 311 of metal connecting piece 31; above structure has guaranteed to realize between the conductor that plane or face of cylinder contact connect; help reducing contact resistance; improve the contact area between the conductor, thus the whole electric energy transmitting efficient that improves terminal box.

The edge of loam cake liner 7 described in the utility model extends to the bottom near base 1 always, there is the isolation bar of projection at three edges of square hole that the bottom of base 1 is used to introduce busbar, and can guarantee like this has enough creepage distances and electric clearance between inner conductive part and the loam cake 2.

Above-mentioned execution mode only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage that is familiar with this technology can understand content of the present utility model and is implemented; can not limit protection range of the present utility model with this; all equivalences of being done according to the utility model spirit change or modify, and all should be encompassed in the protection range of the present utility model.

Claims

1. solar battery connecting box, comprise base (1) and cover loam cake (2) on base (1), loam cake (2) outer surface has fin (21), at least be provided with two terminations (3) in the base (1), electrically connect by diode (4) between adjacent two terminations (3), it is characterized in that: described loam cake (2) inner surface is provided with thermal conductive silicon rubber cushion (5), thermal conductive silicon rubber cushion (5) has the semicircle cambered surface (51) that matches with diode (4) outer surface circular arc, after loam cake (2) is placed on the base (1), this semicircle cambered surface (51) fits with diode (4) outer surface, described termination (3) comprises the metal connecting piece (31) with horizontal inner concave arc surface (311), the pin level of diode (4) places in the described inner concave arc surface (311), metal connecting piece (31) one ends can insert the busbar of solar module, and the other end is connected with the binding post (6) that can insert the photovoltaic cable.

2. solar battery connecting box according to claim 1, it is characterized in that: described termination (3) also comprises junction block (32), be placed on the insulation cover plate (33) on the junction block (32), folding spring (34) and wind spring (35), metal connecting piece (31) is fastened on the junction block (32), metal connecting piece (31) is positioned at the busbar incoming end and has the upwards perpendicular (312) of bending, this perpendicular (312) end has circular arc bending (313), the middle part has the section of bending inwards (314), this section of bending inwards (314) is passed the through hole (341) at folding spring (34) middle part will roll over the medial surface that spring (34) is fastened on perpendicular (312), the top ends of folding spring (34) has arc bending segment (342), lateral surface and elastic compression that arc bending segment (342) is positioned at perpendicular (312) bend on (313) in the terminal circular arc of perpendicular (312), wind spring (35) is located at the medium position of metal connecting piece (31), insulation cover plate (33) covers after junction block (32) is gone up and presses down wind spring (35), and the bottom surface of wind spring (35) is pressed on the pin of diode (4) in the inner concave arc surface (311) of metal connecting piece (31).

3. solar battery connecting box according to claim 2, it is characterized in that: described loam cake (2) inner surface is fixed with loam cake liner (7), loam cake liner (7) compresses thermal conductive silicon rubber cushion (5) and is fitted in loam cake (2) inner surface, and loam cake liner (7) is positioned at insulation cover plate (33) top to have at loam cake (2) and build the boss (71) that suppresses insulation cover plate (33) after base (1) is gone up.

4. solar battery connecting box according to claim 3 is characterized in that: the circulation canal (8) that has formed air flows between the medial surface of the lateral surface of described loam cake liner (7) and base (1) and loam cake (2) after the overall fixed installation.

5. solar battery connecting box according to claim 1, it is characterized in that: described base (1) is gone up plane annular and is provided with sealed groove (11), be placed with sealing ring (9) in the sealed groove (11), loam cake (2) is placed on and compresses sealing ring (9) after base (1) is gone up.

6. solar battery connecting box according to claim 1, it is characterized in that: described loam cake (2) and fin (21) integrative-structure for adopting aluminium alloy to make, fin (21) is the evagination circular shape, be distributed on the outer surface of loam cake (2), the part that its area of dissipation is big is positioned at diode (4) top.