CN202034386U

CN202034386U - Junction box for solar battery

Info

Publication number: CN202034386U
Application number: CN2011200715665U
Authority: CN
Inventors: 吕纪坤
Original assignee: JIANGSU JIUDING SOLAR ENERGY SYSTEM CO Ltd
Current assignee: JIANGSU JIUDING SOLAR ENERGY SYSTEM CO Ltd
Priority date: 2011-03-18
Filing date: 2011-03-18
Publication date: 2011-11-09
Anticipated expiration: 2021-03-18

Abstract

The utility model discloses a junction box for a solar battery, which comprises a base and an upper cover covered on the base, wherein at least two connecting terminals are arranged in the base, the two adjacent connecting terminals are electrically connected through SMD (Surface Mounted Device) diodes, one end of each connecting terminal is connected with a solar battery component bus-bar, and the other ends of the connecting terminals are connected with a photovoltaic cable; a heat conducting silica gel cushion is arranged between the inner surface of the upper cover and the connecting terminals and used for transferring heat generated by the SMD diodes in working to the upper cover for radiating; and the horizontal pins of the SMD diodes are connected with the connecting terminals. In the utility model, under the combined action of the heat conducting silica gel cushion and a flow passage cavity for air movement, the heat generated by the diodes in working can be radiated quickly, so that the integral radiating performance of the junction box is improved; conductors are connected through patch welding and spot welding so as to reduce contact resistance and improve electrical energy transmission efficiency of the junction box; and the pins of the diodes are horizontally arranged and are not bent so as to prevent the structures of inner chips of the diodes from damage.

Description

The used for solar batteries terminal box

Technical field

The utility model relates to the solar module technical field, especially a kind of terminal box that is used for solar cell.

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 a contact, 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 discharges after passing to housing by air transmitted in the housing and convection current, but because the heat conductivility of air and plastics is poor, heat in the housing can not in time discharge, caused the temperature in the housing constantly to raise, the operational environment of high temperature makes the energising ability of diode sharply descend, and has both reduced the generating efficiency of solar components, shorten 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 is will to be welded on the junction block in the jack of insertion junction block after the bending pins or with pin earlier when installing, 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; Be connected or repeatedly connect by punching press between wire harness and the terminal, increased contact resistance by the transition terminal.

The utility model content

The technical problems to be solved in the utility model is: overcome the deficiency in the prior art, a kind of used for solar batteries terminal box is provided, with the heat dispersion of raising terminal box integral body and the efficiency of transmission of electric energy, prolong the useful life of terminal box.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of used for solar batteries terminal box, comprise base and the loam cake that covers on base, at least be provided with two binding posts in the base, electrically connect by stamp-mounting-paper diode between adjacent two binding posts, binding post one end connects the solar module busbar, the other end connects photovoltaic cable, be provided with the thermal conductive silicon rubber cushion that the stamp-mounting-paper diode work calories is delivered to loam cake and distributes between described upper interior surface and the binding post, the stamp-mounting-paper diode pin is horizontal to be connected with binding post.

Specifically, described upper interior surface has the plane boss, binding post comprises horizontal copper sheet connector, copper sheet connector one end connects the solar module busbar, the other end connects photovoltaic cable, and the thermal conductive silicon rubber cushion is located on the boss of plane, is fixed on upper interior surface by the loam cake liner plate around the thermal conductive silicon rubber cushion, after loam cake was placed on the base, loam cake compressed the thermal conductive silicon rubber cushion on the surface that is fitted in the copper sheet connector.

Furtherly, the pin horizontal welding of described stamp-mounting-paper diode is connected on the surface of copper sheet connector, the copper sheet connector is connected with photovoltaic cable spot welding, and photovoltaic cable is drawn the binding post position and is provided with the line ball lid that compresses photovoltaic cable, and photovoltaic cable protuberate basic unit place is provided with wire bushing.

Described copper sheet connector is fixed on the base by the reference column rivet hot.

Described base bottom has the runner cavity that flows and distribute for the stamp-mounting-paper diode work calories, and the heat that diode operation is produced distributes rapidly by the cross-ventilation mode.

Sealing when using for improving terminal box, described base upper periphery is provided with sealed groove, is perfused with fluid sealant in the sealed groove, and loam cake is placed on the base back by being located at the hasp fastening on the base.

For improving the terminal box radiating effect, described loam cake adopts superior aluminium alloy or the magnesium alloy of heat dispersion to be made, and is distributed with the heat radiation rib on the last exterior surface, and the heat radiation rib is the evagination circular shape, is distributed on the outer surface of loam cake.

The beneficial effects of the utility model are: the utility model is provided with the thermal conductive silicon rubber cushion between binding post and upper interior surface, being provided with in the base bottom simultaneously can be for the runner cavity of air flows, a heat part that produces when making diode operation can pass to loam cake fast by the thermal conductive silicon rubber cushion and distribute, another part distributes by the runner cavity of bottom is mobile, improved the heat dispersion of terminal box integral body thus, guarantee that terminal box internal temperature control and the job stability of diode and useful life in the reasonable scope, and the paster that is connected between the conductor welds and spot welding, 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 is direct horizontal positioned without bending, has prevented that 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 the sectional structure schematic diagram of A-A among Fig. 1.

1. bases, 101. runner cavitys, 102. sealed grooves, 2. loam cakes, 21. plane boss, 22. heat radiation ribs, 3. binding posts, 31. copper sheet connectors, 4. stamp-mounting-paper diodes, 5. busbars, 6. photovoltaic cables, 7. thermal conductive silicon rubber cushions, 8. loam cake liner plates, 9. line balls cover 10. wire bushings, 11. reference columns, 12. fluid sealants, 13. hasps 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, a kind of used for solar batteries terminal box shown in Figure 2, comprise base 1 and the loam cake 2 that covers on base 1, sealing when using for improving terminal box, described base 1 upper periphery is provided with sealed groove 102, be perfused with fluid sealant 12 in the sealed groove 102, loam cake 2 is placed on the base 1 back by being located at hasp 13 fastenings on the base 1, keep sealing state in fluid sealant 12 sclerosis backs, in base 1, be provided with four

binding posts

3,3 of adjacent two binding posts pass through stamp-mounting-paper diode 4 and electrically connect, described binding post 3 comprises horizontal copper sheet connector 31, copper sheet connector 31 is fixed on the base 1 by reference column 11 rivet hots, copper sheet connector 31 1 ends connect solar module busbar 5, the other end connects photovoltaic cable 6, the pin horizontal welding of described stamp-mounting-paper diode 4 is connected on the surface of copper sheet connector 31, copper sheet connector 31 is connected with photovoltaic cable 6 spot welding, photovoltaic cable 6 is drawn binding post 3 positions and is provided with the line ball lid 9 that compresses photovoltaic cable 6, photovoltaic cable 6 protuberate basic units 1 place is provided with wire bushing 10, is provided with the thermal conductive silicon rubber cushion 7 that stamp-mounting-paper diode 4 work calorieses is delivered to loam cake 2 and distributes between the copper sheet connector 31 of described loam cake 2 inner surfaces and binding post 3.

Specifically, described loam cake 2 inner surfaces have plane boss 21, thermal conductive silicon rubber cushion 7 is located on the plane boss 21, be fixed on loam cake 2 inner surfaces by loam cake liner plate 8 around the thermal conductive silicon rubber cushion 7, after loam cake 2 is placed on the base 1, loam cake 2 compresses thermal conductive silicon rubber cushion 7 on the surface that is fitted in copper sheet connector 31, make the plane of thermal conductive silicon rubber cushion 7 and the plane of copper sheet connector 31 fit, distribute thereby the heat that produces during with stamp-mounting-paper diode 4 work passes to loam cake 2 fast by thermal conductive silicon rubber cushion 7.

Described base 1 bottom has the runner cavity 101 that flows and distribute for stamp-mounting-paper diode 4 work calorieses, forms the mobile air channel of a hanging type, and the heat that stamp-mounting-paper diode 4 work are produced distributes rapidly by the cross-ventilation mode.

For improving terminal box integral heat sink effect, described loam cake 2 has adopted superior aluminium alloy of heat dispersion or magnesium alloy to be made, be distributed with some heat radiation ribs 22 on loam cake 2 outer surfaces, heat radiation rib 22 is the evagination circular shape, is equally distributed on the outer surface of loam cake 2 at interval.

Be connected to paster welding and spot welding between the conductor of the present utility model, help reducing contact resistance, improve the contact area between the conductor, thereby the whole electric energy transmitting efficient that has improved terminal box, between binding post 3 and loam cake 2 inner surfaces, thermal conductive silicon rubber cushion 7 is set, being provided with in base 1 bottom simultaneously can be for the runner cavity 101 of air flows, a heat part that produces when making stamp-mounting-paper diode 4 work can pass to loam cake 2 fast by thermal conductive silicon rubber cushion 7 and distribute, another part is by runner cavity 101 mobile the distributing of bottom, improved the heat dispersion of terminal box integral body thus, guarantee that terminal box internal temperature may command and the job stability of stamp-mounting-paper diode 4 and useful life in the reasonable scope, diode adopts stamp-mounting-paper diode 4, like this pin of diode without bending direct horizontal positioned, prevented that the structure of diode inside chip from being damaged.

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. used for solar batteries terminal box, comprise base (1) and cover loam cake (2) on base (1), at least be provided with two binding posts (3) in the base (1), electrically connect by stamp-mounting-paper diode (4) between adjacent two binding posts (3), binding post (3) one ends connect solar module busbar (5), the other end connects photovoltaic cable (6), it is characterized in that: be provided with the thermal conductive silicon rubber cushion (7) that stamp-mounting-paper diode (4) work calories is delivered to loam cake (2) and distributes between described loam cake (2) inner surface and the binding post (3), stamp-mounting-paper diode (4) pin is horizontal to be connected with binding post (3).

2. used for solar batteries terminal box according to claim 1, it is characterized in that: described loam cake (2) inner surface has plane boss (21), binding post (3) comprises horizontal copper sheet connector (31), copper sheet connector (31) one ends connect solar module busbar (5), the other end connects photovoltaic cable (6), thermal conductive silicon rubber cushion (7) is located on the plane boss (21), thermal conductive silicon rubber cushion (7) is fixed on loam cake (2) inner surface by loam cake liner plate (8) all around, after loam cake (2) was placed on the base (1), loam cake (2) compressed the surface that is fitted in copper sheet connector (31) with thermal conductive silicon rubber cushion (7).

3. used for solar batteries terminal box according to claim 2, it is characterized in that: the pin horizontal welding of described stamp-mounting-paper diode (4) is connected on the surface of copper sheet connector (31), copper sheet connector (31) is connected with photovoltaic cable (6) spot welding, photovoltaic cable (6) is drawn binding post (3) position and is provided with the line ball lid (9) that compresses photovoltaic cable (6), and photovoltaic cable (6) protuberate basic unit (1) locates to be provided with wire bushing (10).

4. used for solar batteries terminal box according to claim 2 is characterized in that: described copper sheet connector (31) is fixed on the base (1) by reference column (11) rivet hot.

5. used for solar batteries terminal box according to claim 1 is characterized in that: described base (1) bottom has the runner cavity (101) that flows and distribute for stamp-mounting-paper diode (4) work calories.

6. used for solar batteries terminal box according to claim 1, it is characterized in that: described base (1) upper periphery is provided with sealed groove (102), be perfused with fluid sealant (12) in the sealed groove (102), loam cake (2) is placed on base (1) and goes up the back by being located at hasp (13) fastening on the base (1).

7. used for solar batteries terminal box according to claim 1, it is characterized in that: described loam cake (2) adopts superior aluminium alloy or the magnesium alloy of heat dispersion to be made, be distributed with heat radiation rib (22) on loam cake (2) outer surface, the heat radiation rib is the evagination circular shape, is distributed on the outer surface of loam cake (2).