CN103944505A - Photovoltaic cell module terminal box of wiring window free of bus bars on surface - Google Patents
Photovoltaic cell module terminal box of wiring window free of bus bars on surface Download PDFInfo
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- CN103944505A CN103944505A CN201410173211.5A CN201410173211A CN103944505A CN 103944505 A CN103944505 A CN 103944505A CN 201410173211 A CN201410173211 A CN 201410173211A CN 103944505 A CN103944505 A CN 103944505A
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- box body
- photovoltaic cell
- plastic box
- terminal box
- diode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention relates to the field of photovoltaic technologies and discloses a photovoltaic cell module terminal box of a wiring window free of bus bars on the surface. The photovoltaic cell module terminal box of the wiring window free of the bus bars on the surface comprises a plastic box body for an output wire cable to be connected in a sealed mode, wherein an opening is formed at the bonding position of the back side of the plastic box body and a photovoltaic cell module back board or glass, the front side and the lateral side of the plastic box body are airtight and free of windows, wiring terminals with the same number as the bus bars led out of photovoltaic cell module back board or the glass are arranged in the plastic box body, a bypass diode is connected between adjacent wiring terminals, the wiring terminals at two ends are respectively connected with positive and negative poles of the output wire cable and respectively provided with heat-dissipation conductive metal pieces, and diodes are arranged on the heat-dissipation conductive metal pieces. The photovoltaic cell module terminal box is simple in structure, the surface of the plastic box body is airtight and free of windows, the heat dissipation effect is ideal, the electricity generation attenuation loss is reduced, waterproof reliability is good, installation operation is convenient, and the manufacturing and follow-up installation and usage cost of the terminal box is remarkably reduced.
Description
Technical field
The present invention relates to photovoltaic technology field, especially a kind of surface is without the photovoltaic cell component terminal box of busbar wiring windows.
Background technology
In photovoltaic technology field, we are generally called photovoltaic cell component terminal box and photovoltaic cell component backboard or glass gluing face the back side of terminal box, the projection plane of symmetry at the back side is called the front of terminal box, and other circumferential surfaces can be described as side, and positive and side can be referred to as surface.
The connected mode of the binding post of photovoltaic cell component terminal box and solar panel convergent belt generally has following two kinds: a kind of is that the terminal box back side is fitted in to photovoltaic cell component backboard or glass, from the window in terminal box front, convergent belt is connected with terminal soldering; Another kind is that the terminal box back side is fitted in after photovoltaic cell component backboard or glass surface, from the window in terminal box front, convergent belt is inserted to cassette terminal, relies on the making leaf spring elastic force of cassette arrangements of terminal by convergent belt and power connection end sub-connection.
Two kinds of connected modes all require terminal box front to have wiring window, after lineman waiting completes, add and cover the upper plastic cover that is equipped with sealing ring, guarantee terminal box water-tight.Also can then add a cover upper plastic cover first to the inner fluid sealant that injects of terminal box front window in addition, such terminal box is called rubber filling type terminal box again.Above-mentioned terminal box manufacturing cost of the prior art is higher, and subsequent installation operation is comparatively loaded down with trivial details, expends man-hour.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiency in prior art, provide a kind of simple in structure, easy for installation, surface is airtight, without windowing, waterproof reliability is strong and can significantly reduce the surface of manufacture and subsequent installation use cost without the photovoltaic cell component terminal box of busbar wiring windows.
The technical solution adopted for the present invention to solve the technical problems is: a kind of surface comprises the plastic box body of output cable sealing access without the photovoltaic cell component terminal box of busbar wiring windows, this plastic box body back side and photovoltaic cell component backboard or glass gluing place have opening, plastic box body is positive and side is airtight without window, in plastic box body, be arranged with photovoltaic cell component backboard or glass and draw the binding post that busbar quantity equates, between adjacent line terminals, be connected with diode, the binding post at two ends respectively with output cable just, negative pole is connected, binding post has respectively radiation conductive sheet metal, described diode is arranged on radiation conductive sheet metal.
In order to improve the radiating effect of terminal box, the bottom surface of radiation conductive sheet metal fits in the inwall of plastic box body.A part for diode thickness direction and the pin of diode embed plastic box body, and the pin of diode is between radiation conductive sheet metal and plastic box body.The heat that during work, diode produces conducts to sheet metal surface by pin, by directly outwards heat radiation of plastic box body, significantly promoted the radiating effect of terminal box diode, while greatly having retrieved due to diode operation, high-temperature factor causes the decay of photovoltaic efficiency, has reduced the risk that diode easily at high temperature punctures.
The lateral parts of radiation conductive sheet metal fits in plastic box body inwall, to be radiation conductive sheet metal be partially submerged into the inwall of plastic box body along self thickness direction, strengthen the adhesive force of sheet metal in terminal box, further improved the impact strength on terminal box surface.
The present invention, due to the structural design that adopts box surface without window, is also provided with sealing shroud between plastic box body and output cable, thereby has guaranteed better the sealing state of terminal box, has promoted the water-tight performance reliability of terminal box in photovoltaic plant application.
The invention has the beneficial effects as follows: surface provided by the invention is without the photovoltaic cell component terminal box of busbar wiring windows, simple in structure, easy for installation, plastic box body surface is airtight, and without windowing, waterproof reliability is strong, radiating effect is remarkable, reduce generating attenuation loss, promoted photovoltaic efficiency, reduced the manufacture of terminal box and follow-up installing and using cost and extended the useful life of terminal box.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of existing rubber filling type terminal box.
Fig. 2 is the upper plastic cover of existing rubber filling type terminal box and the sealing ring that is assemblied in upper cover inside.
Fig. 3 is front view of the present invention.
Fig. 4 is the cutaway view of B-B in Fig. 1.
Fig. 5 is the cutaway view of C-C in Fig. 1.
Fig. 6 is the cutaway view of A-A in Fig. 1.
Fig. 7 is the structural representation of receptacle portion in embodiment.
Fig. 8 is the structural representation of embodiment middle connecting terminal.
1. output cable 2. plastic box body 2-1. intercalation part 3. backboards or glass 4. binding post 4-1. radiation conductive sheet metal 5. diode 5-1. pin 6. sealing shroud 7. busbar 8. receptacle portion 9.3M two-sided tape 10. elastic pressure parts 11. fluid sealant 12. busbar wiring windows 13. upper plastic cover 14. sealing rings in figure
Embodiment
The present invention is further illustrated with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention is only described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 1 to Figure 2 be a kind of rubber filling type terminal box common in prior art, this terminal box front has busbar wiring windows 12, after staff is fixed on photovoltaic cell component backboard or glass 3 by terminal box, in the interior operation of busbar wiring windows 12, after binding post 4 is connected with busbar 7, thinks the interior encapsulating of busbar wiring windows 12 and add a cover the rubber filling type terminal box of upper plastic cover 13.For guaranteeing terminal box sealing, in upper plastic cover 13, be also equipped with sealing strip 14.
A kind of surface as shown in Figures 3 to 5, without the photovoltaic cell component terminal box of busbar wiring windows, comprises the plastic box body 2 of output cable 1 sealing access.Plastic box body 2 has with output cable 1 and is not limited to following three kinds of modes that sealing accesses: plastic box body 2 is integrated injection structure with output cable 1; Between plastic box body 2 and output cable 1, be provided with sealing shroud 6; Adopt split type mounting structure, first output cable 1 is fit into plastic box body 2, then on output cable 1, be pressed into briquetting, after output cable 1 being pressed in to plastic box body 2 by briquetting, by welding procedure, plastic box body 2 and briquetting are welded, sealant pouring and sealing is carried out in the space between the most backward output line cable, plastic box body 2 and briquetting three.Preferably, between plastic box body 2 and output cable 1, by being injected with sealing shroud 6, seal.Sealing shroud 6 has certain elasticity, has effectively guaranteed the seal at output cable 1 access plastic box body 2 places after injection moulding, has improved the water resistance of terminal box.
Plastic box body 2 backside openings, plastic box body 2 is positive and side is all airtight without window, in plastic box body 2, be arranged with photovoltaic cell component backboard or glass 3 and draw the binding post 4 that busbar 7 quantity equate, between adjacent line terminals 4, be connected with diode 5, the binding post 4 at two ends is connected with the positive and negative electrode of output cable 1 respectively.
Binding post 4 has respectively radiation conductive sheet metal 4-1, and it is upper that described diode 5 is arranged on radiation conductive sheet metal 4-1, and the bottom surface of radiation conductive sheet metal 4-1 fits in the inwall at plastic box body 2 back sides.Preferably, radiation conductive sheet metal 4-1 embeds plastic box body 2 back side inwalls along 1/2nd thickness of self thickness direction.A part for diode 5 thickness directions and the pin 5-1 of diode 5 embed plastic box body 2, and the pin 5-1 of diode 5 is between radiation conductive sheet metal 4-1 and plastic box body 2.Diode 5 embeds plastic box body 2 thickness and is preferably 1/4th of self thickness.
During terminal box work, in order to guarantee 5 life-spans of diode, reduce the electrical loss causing due to diode 5 heat fades, the internal temperature of terminal box has certain standard.Common terminal box is in order to dispel the heat conveniently, and a kind of is to adopt the materials such as aluminium alloy of rapid heat dissipation to make terminal box, but the terminal box that aluminium alloy is made not only production and application cost is high, and higher to high-tension requirement of shelter; On the other hand, in order to meet the requirement of creepage distance Valuation Standard in terminal box, must strengthen the volume of terminal box; Or open up heat dissipation channel in potting compound junction box inside, and meet creepage distance and waterproof requirement by inside encapsulating, first diode 5 generation heats conduct to fluid sealant and then by fluid sealant, conduct to plastic box body 2 surfaces, through twice conduction, outwards dispel the heat, and the coefficient of heat transfer of the fluid sealant inwardly pouring into is poor, therefore heat loss through conduction effect is unsatisfactory, diode easily punctures.And adopt surface without the photovoltaic cell component terminal box of busbar wiring windows, during work, heat on radiation conductive sheet metal 4-1 can be directly transferred to backward outer the shedding of plastic box body 2, effectively improved the radiating effect of terminal box, during assurance work, in terminal box, temperature meets standard, has promoted the useful life of photovoltaic efficiency and diode.And the pin 5-1 of diode 5 embeds between radiation conductive sheet metal 4-1 and plastic box body 2 inwalls, the heat that during work, diode 5 produces, can pass through the directly outwards heat radiation of pin 5-1, plastic box body 2, heat also can conduct to radiation conductive sheet metal 4-1 by pin 5-1, via radiation conductive sheet metal 4-1, conduct to then outwards heat radiation of plastic box body 2, further strengthened the radiating effect of terminal box, the internal temperature while making terminal box work is better than standard.
When terminal box wiring is installed, only need the busbar for the treatment of wiring on photovoltaic cell component backboard or glass 37 and power connection end to be electrically connected, then plastic box body 2 sealings are fixed on photovoltaic cell component backboard or glass 3.
Consider to patronize the actual installation demand of battery case, the busbar 7 that can be designed with as shown in Figure 6 to 8 passes through a kind of embodiment of plugging mode wiring with binding post 4, comprises by the receptacle portion 8 of each busbar 7 accesses insulated from each other on photovoltaic cell component backboard or glass 3 with by the plastic box body 2 of power transmission cable 1 sealing access.These plastic box body 2 bottom surface openings also can cover receptacle portion 8, and surface is airtight without window.The interior integrated injection molding of plastic box body 2 has the intercalation part 2-1 matching with described receptacle portion 8, intercalation part 2-1 is arranged with the binding post 4 with quantity such as busbars 7, between adjacent line terminals 4, be connected with diode 5, the binding post 4 at two ends is connected with the positive and negative electrode of output cable 1 respectively.
Binding post 4 has respectively radiation conductive sheet metal 4-1, and it is upper that diode 5 is arranged on radiation conductive sheet metal 4-1, and radiation conductive sheet metal 4-1 embeds plastic box body 2 inwalls along 1/2nd thickness of self thickness direction.A part for diode 5 thickness directions and the pin 5-1 of diode 5 embed plastic box body 2, and the pin 5-1 of diode 5 is between radiation conductive sheet metal 4-1 and plastic box body 2.It is 1/4th of self thickness that diode 5 embeds plastic box body 2 thickness.
The wiring installation process of this embodiment has following steps:
A, by the busbar for the treatment of wiring of drawing from backboard or glass 3 on photovoltaic cell component 7 access receptacle portion 8, described receptacle portion 8 is carried secretly to 9 and is fixed on photovoltaic cell component backboard or glass 3 by 3M is two-sided.
B, described plastic box body 2 is covered to described receptacle portion 8 and makes its intercalation part 2-1 insert receptacle portion 8, make each binding post 4 and the corresponding conducting of each busbar 7 simultaneously, in wiring process, in order to guarantee binding post 4 with busbar 7 conductings and to simplify installation process, each binding post 4 uses with busbar 7 conducting portions the elastic pressure parts 10 that both are reliably contacted.
C, the peristome of plastic box body 2 is stamped to fluid sealant 11, and further press down on photovoltaic cell component backboard or glass 3 after will plastic box body 2 pegging graft with receptacle portion 8, and it is airtight fixing, make the inside of plastic box body 2 with outside isolated.Adopting fluid sealant 11 that plastic box body 2 is fixing with backboard or glass 3 sealings herein, is only preferred a kind of means that are adhesively fixed, and plastic box body 2 and backboard or glass 3 sealings are fixing, also can adopt the multiple means such as adhered by double sided plaster is fixing to reach.
Wiring process completes before fixed plastics box body 2 is installed, without increasing busbar wiring window 12 operation wiring processes and add a cover upper plastic cover 13 and realize terminal box inner sealing on plastic box body 2.Because plastic box body 2 surfaces all seal, plastic box body 2 is also effectively airtight with output cable 1 place, only need carry out seal operation at plastic box body 2 backside openings places, just without filling with fluid sealant 11 for sealing adds to plastic box body 2 inside again, simplified installation procedure, installation process is simple and convenient, and can effectively reduce the follow-up cost of installing and using.
The mode of connection of busbar 7 and binding post 4, is not only confined to above-mentioned plugging mode, also can be according to demand, and directly the mode by welding realizes.For example binding post 4 is designed at plastic box body 2 backside openings places, and lengthen the wiring part of binding post 4, also can add according to demand insulating sleeve.When terminal box is installed, first by busbar 7 and binding post 4 wiring place welding, plastic box body 2 backside openings portions are naturally pressed down and are fixed on photovoltaic cell component backboard or glass 3, and busbar 7 can naturally bend and hide into plastic box body 2 inside with binding post 4 welding wiring parts.With respect to by patching the mode of the wiring conducting that realizes busbar and binding post, a step welding process that wiring installation process is relatively many, but make receptacle portion 8 and intercalation part 2-1 owing to not needing additional processing, cost of material and the processing cost of terminal box have obtained reduction, can have client need to select according to self.
In addition, according to the requirement of used for optoelectronic module terminal box bypass diode heat test standard, technical staff's effects on surface is without the photovoltaic cell component terminal box of busbar wiring windows and adopt the diodes inside terminal box 5 of above-mentioned plugging mode wiring to carry out following junction temperature test:
1. the diode 5 in butted line box applies the terminal box rated current 15A of forward;
2. then terminal box is put into vertical electric constant temperature forced air drying test chamber, and test piece is heated to (75 ± 5) ℃;
3. gather temperature and the voltage of each diode 5 in 1 hour.
The explanation providing according to diode 5 manufacturers, according to diode 5 temperature and the diode 5 body power loss values that record, calculate known: surface without the photovoltaic cell component terminal box of busbar wiring windows in the situation that rated current is 15A, the maximum of diode junction temperature is 149.31 ℃, is no more than 150 ℃.
And the terminal box of rubber filling type as shown in Figure 1 diode 5 junction temperatures of the same type are all not less than 185 ℃ under prior art.The remarkable lifting that this radiating effect obtains, it is the major technological breakthrough in photovoltaic technology field, the plastics plastic box body 2 that can guarantee terminal box can be not aging ahead of time because bearing excessive temperature, break down, 5 life-spans of diode have been guaranteed simultaneously, reduction, due to the generation loss that diode 5 heat fades cause, has further improved reliability and the useful life of terminal box.
Above-described embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; all equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (5)
1. a surface is without the photovoltaic cell component terminal box of busbar wiring windows, it is characterized in that: comprise the plastic box body (2) of output cable (1) sealing access, this plastic box body (2) back side and photovoltaic cell component backboard or glass (3) joint place have opening, plastic box body (2) is positive and side is airtight without window, in plastic box body (2), be arranged with photovoltaic cell component backboard or glass (3) and draw the binding post (4) that busbar (7) quantity equates, between adjacent line terminals (4), be connected with diode (5), the binding post at two ends (4) respectively with output cable (1) just, negative pole is connected, binding post (4) has respectively radiation conductive sheet metal (4-1), described diode (5) is arranged on radiation conductive sheet metal (4-1).
2. surface according to claim 1, without the photovoltaic cell component terminal box of busbar wiring windows, is characterized in that: the bottom surface of described radiation conductive sheet metal (4-1) fits in the inwall of plastic box body (2).
3. surface according to claim 2, without the photovoltaic cell component terminal box of busbar wiring windows, is characterized in that: the lateral parts of described radiation conductive sheet metal (4-1) fits in plastic box body (2) inwall, to be radiation conductive sheet metal (4-1) be partially submerged into the inwall of plastic box body (2) along self thickness direction.
4. surface according to claim 3 is without the photovoltaic cell component terminal box of busbar wiring windows, it is characterized in that: a part for described diode (5) thickness direction and the pin (5-1) of diode (5) embed plastic box body (1), and the pin (5-1) of diode (5) is positioned between radiation conductive sheet metal (4-1) and plastic box body (2).
5. surface according to claim 1, without the photovoltaic cell component terminal box of busbar wiring windows, is characterized in that: between described plastic box body (2) and output cable (1), be also provided with sealing shroud (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410173211.5A CN103944505B (en) | 2014-04-25 | 2014-04-25 | Surface is without the photovoltaic cell component rosette of busbar wiring windows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410173211.5A CN103944505B (en) | 2014-04-25 | 2014-04-25 | Surface is without the photovoltaic cell component rosette of busbar wiring windows |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103944505A true CN103944505A (en) | 2014-07-23 |
| CN103944505B CN103944505B (en) | 2016-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410173211.5A Active CN103944505B (en) | 2014-04-25 | 2014-04-25 | Surface is without the photovoltaic cell component rosette of busbar wiring windows |
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| CN (1) | CN103944505B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207609A (en) * | 2015-03-13 | 2015-12-30 | 常州天合光能有限公司 | Ventilation and heat dissipation intelligent junction box |
| CN105515520A (en) * | 2016-01-06 | 2016-04-20 | 莱尼电气线缆（中国）有限公司 | Solar conjunction box |
| CN105897150A (en) * | 2016-04-29 | 2016-08-24 | 黄子健 | Low-junction-temperature photovoltaic junction box and chip assembly therefor |
| CN108259003A (en) * | 2018-03-08 | 2018-07-06 | 张士永 | A kind of whole other scholar's photovoltaic junction box |
| CN109067357A (en) * | 2018-10-09 | 2018-12-21 | 安徽大恒能源科技有限公司 | A kind of assembly technology of the basic terminal box of photovoltaic management system |
| US10355638B2 (en) | 2016-01-06 | 2019-07-16 | LEONI Cable (China) Co., Ltd. | Solar junction box |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207609A (en) * | 2015-03-13 | 2015-12-30 | 常州天合光能有限公司 | Ventilation and heat dissipation intelligent junction box |
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| CN105515520A (en) * | 2016-01-06 | 2016-04-20 | 莱尼电气线缆（中国）有限公司 | Solar conjunction box |
| US10355638B2 (en) | 2016-01-06 | 2019-07-16 | LEONI Cable (China) Co., Ltd. | Solar junction box |
| CN105897150A (en) * | 2016-04-29 | 2016-08-24 | 黄子健 | Low-junction-temperature photovoltaic junction box and chip assembly therefor |
| CN108259003A (en) * | 2018-03-08 | 2018-07-06 | 张士永 | A kind of whole other scholar's photovoltaic junction box |
| CN109067357A (en) * | 2018-10-09 | 2018-12-21 | 安徽大恒能源科技有限公司 | A kind of assembly technology of the basic terminal box of photovoltaic management system |
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|---|---|
| CN103944505B (en) | 2016-11-02 |
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