The double glazing photovoltaic module that back side glass separates
Technical field
The present invention relates to the double glazing photovoltaic module that a kind of back side glass separates.
Background technology
Traditional two glass assemblies are generally that front and back 2 sheet glass are same sizes, adopt the little terminal box of side, and such structure weak point is: terminal box body is very little, the size-constrained system of diode, the general electric current of little diode is little, and box body is little, is unfavorable for heat radiation; Such junction box structure impact resistance is very poor; Busbar is drawn by glass side, and internally charged body almost contacts with edge, and distance is very little, very large on insulation property impact.
The upper lower-glass having is different in size, and same terminal box is contained on front glass, is also to deposit superincumbent problem.
It is crescent that some double glazing assemblies adopt glass end, the back side, and such structure need to design new terminal box, and terminal box bottom design complexity, and the difficulty of applying glue simultaneously, is very easy to cause poor sealing.
Two glass structures perforate on glass or the fluting overleaf having, can use so conventional terminal box, but the cost of back-panel glass perforate is high, and the glass stress raisers after perforate are very easy to self-destruction.
Summary of the invention
Technical problem to be solved by this invention is: a kind of back side double glazing photovoltaic module that glass separates is provided, avoids fluting on backboard to exist stress to concentrate and cause that assembly breaks.
The technical solution adopted for the present invention to solve the technical problems is: the double glazing photovoltaic module that a kind of back side glass separates, comprise panel, battery strings and backboard, battery strings is encapsulated between panel and backboard, the busbar of battery strings is connected with the terminal box being arranged on backboard, backboard forms an entirety by backboard unit spliced, the busbar of battery strings is drawn by the splicing seams of backboard unit, is connected with terminal box.
Preferably, backboard forms an entirety by two backboard unit spliceds.
Further, the battery strings in assembly is divided into two kinds of forms,
One is formed as: battery strings comprises two of left and right part independently, two parts battery strings is drawn by busbar separately, two backboard unit cover respectively in two parts battery strings, two parts battery strings busbar is separately drawn by the splicing seams between two backboard unit, be connected with terminal box, two parts battery strings is connected in terminal box or parallel connection becomes a Circuits System.
Two backboard unit spliced seams are positioned at the medium position at the assembly back side.
Another kind is formed as: battery strings is as a whole, one in two backboard unit covers in whole battery strings, other regions except battery strings region at another piece covering assemblies back side, busbar is drawn by the splicing seams between two backboard unit, is connected with terminal box.
Two backboard unit spliced seams are positioned at the end position at the assembly back side.
When closely splicing at two backboard unit, be more conducive to drawing of busbar, on splicing edge, to slot for any one in two backboard unit, the busbar of battery strings is drawn by the splicing seams at fluting place; Or all slot in two described backboard unit on the correspondence position of splicing edge, the busbar of battery strings is drawn by the splicing seams at fluting place.
Preferably, the fluting on splicing edge is crescent.
In order to ensure 2 stress contacts between backboard unit, in the splicing seams of two backboard unit, spacer is set.
For protection packaging is at the cell piece of assembly, assembly need to seal, and sealing form comprises: assembly surrounding adopts the mode of U-shaped outside sealing to seal;
Or the stitching portion of described backboard unit and assembly surrounding adopt the mode of inner side sealing to seal.
Invention beneficial effect is: compared with traditional double glass assembly, the cost that the present invention can solve two glass assembly back side perforates increases and tapping stress is concentrated and cause the problem that assembly is revealed; Can solve insulation property and the poor problem of impact resistance of two glass components side limit terminal box.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the cross-sectional view of the interior side packing of embodiments of the invention 1;
Fig. 2 is the cross-sectional view of the outer side packing of embodiments of the invention 1;
Fig. 3 is the structure schematic diagram of embodiments of the invention 1;
Fig. 4 is the stereogram at the back side of embodiments of the invention 1;
Fig. 5 is the cross-sectional view of the interior side packing of embodiments of the invention 2;
Fig. 6 is the cross-sectional view of the outer side packing of embodiments of the invention 2;
Fig. 7 is the structure schematic diagram of embodiments of the invention 2;
In figure, 1. panel, 2. battery strings, 3. terminal box, 4. backboard unit, 5. splicing seams, 6. butyl rubber, 7. busbar.
Embodiment
Embodiment 1
As shown in Fig. 1,2,3 and 4, the double glazing photovoltaic module that a kind of back side glass separates, comprise panel 1, battery strings 2 and backboard, battery strings 2 is encapsulated between panel 1 and backboard by EVA, PVB, the busbar 7 of battery strings 2 is connected with the terminal box 3 being arranged on backboard, backboard is by two backboard unit 4 entirety that is spliced, and the busbar 7 of battery strings 2 is drawn by the splicing seams 5 of backboard unit 4, is connected with terminal box 3.Battery strings 2 comprises two of left and right part independently, two parts battery strings 2 is drawn by busbar 7 separately, two backboard unit 4 cover respectively in two parts battery strings 2, two parts battery strings 2 busbar 7 is separately drawn by the splicing seams 5 between two backboard unit 4, be connected with terminal box 3, two parts battery strings 2 is connected in terminal box 3 or parallel connection becomes a Circuits System.The splicing seams 5 of two backboard unit 4 is positioned at the medium position at the assembly back side.
Under normal circumstances, the quantity of left and right two parts battery strings 2 and connected mode make identical, can certainly be different, two blocks of glass that backboard unit 4 is same size, two blocks of glass are together as the backboard of two glass assemblies, and length, width and front glass sheet that 2 glass is added up are identical.On splicing edge, slot for any one in two backboard unit 4, the busbar 7 of battery strings 2 is drawn by the splicing seams 5 at fluting place; Or all slot on the correspondence position of the splicing edge busbar 7 of left and right two parts battery strings 2 of two described backboard unit 4 is all drawn by the splicing seams 5 at fluting place.Fluting is crescent, and such crescent is slotted for glass processing, just as edge edging, does not increase any cost, and ensures that the stress distribution of glass is even.Busbar 7 just can have been installed common terminal box 3 drawing in the middle of crescent fluting.Can certainly not slot.
As shown in Figure 2, assembly surrounding adopts butyl rubber 6 classes such as glue such as grade to seal by the mode of U-shaped outside sealing;
Or as shown in Figure 1, the stitching portion of backboard unit 4 and assembly surrounding adopt the glue classes such as butyl rubber 6 to seal by the mode of inner side sealing.
Embodiment 2
The double glazing photovoltaic module that a kind of back side glass separates, comprise panel 1, battery strings 2 and backboard, battery strings 2 is encapsulated between panel 1 and backboard, the busbar 7 of battery strings 2 is connected with the terminal box 3 being arranged on backboard, backboard is by two backboard unit 4 entirety that is spliced, battery strings 2 is as a whole, one in two backboard unit 4 covers in whole battery strings 2, other regions except battery strings 2 regions at another piece covering assemblies back side, busbar 7 is drawn by the splicing seams 5 between two backboard unit 4, is connected with terminal box 3.
As shown in Fig. 5,6 and 7, two backboard unit 4 are an independent little glass and a large glass, and the splicing seams 5 of two backboard unit 4 is positioned at the end position at the assembly back side.
Length, width and front glass sheet that 2 glass is added up are identical.On splicing edge, slot for any one in two backboard unit 4, the busbar 7 of battery strings 2 is drawn by the splicing seams 5 at fluting place; Or all slot on the correspondence position of the splicing edge busbar 7 of left and right two parts battery strings 2 of two described backboard unit 4 is all drawn by the splicing seams 5 at fluting place.Fluting is crescent, and such crescent is slotted for glass processing, just as edge edging, does not increase any cost, and ensures that the stress distribution of glass is even.Busbar 7 just can have been installed common terminal box 3 drawing in the middle of crescent fluting.Can certainly not slot.
Adjust the distance at internally charged body and assembly edge simultaneously by adjusting the size of two backboard unit 4, meet different structural safety demands.
In order to ensure 2 stress contacts between backboard unit 4, isolate the spacer of plastics or other materials.
As shown in Figure 6, assembly surrounding adopts butyl rubber 6 classes such as glue such as grade to seal by the mode of U-shaped outside sealing;
Or as shown in Figure 5, the stitching portion of backboard unit 4 and assembly surrounding adopt the glue classes such as butyl rubber 6 to seal by the mode of inner side sealing.
Embodiment 3,
Compare with embodiment 2, the as a whole battery strings 2 of battery strings 2, but, two backboard unit 4 all cover on cell piece, splicing seams 5 is away from the end position of assembly, and the busbar 7 of battery strings 2 ends splicing seams 5 from two backboard unit 4 from the end position of assembly goes back to the stitching portion that causes assembly centre position is drawn.
The key point of the laminating technology of the assembly of above-described embodiment 1,2 and 3 is: ensure in lamination process, the not displacement of two backboard unit 4 at the back side, therefore can adopt 2 kinds of technology modes
1. the diverse location between the diverse location between two backboard unit 4, and backboard unit 4 and panel 1 is stained with adhesive tape, carries out lamination one time.
2. wherein backboard unit 4 and the first lamination of panel 1 once, then are put 4 two laminations in an other backboard unit.