Solar module low resistance connected mode and manufacture craft thereof
Technical field
The present invention relates to a kind of solar module, especially a kind of optimal design that the connected mode of battery sheet is carried out.
Background technology
For conventional crystal silicon solar cell assembly (as Fig. 1), the front electrode of battery sheet is parallel with the position of backplate, in the process that is connected in series of adjacent cell string, certainly will introduce extra busbar like this, thereby increase the series resistance of assembly, cause extra power ohmic loss.And on the other hand, the integrated form terminal box of assembly is arranged on assembly minor face midline position usually, and this design not only can increase the length of exit busbar, and can increase the length of cable.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of novel battery sheet connected mode and manufacture craft thereof, can effectively reduce bus bar length, shorten the length of connector cable line, reduce the series resistance of assembly, and then improve conversion efficiency and the power output of solar module.
The technical solution adopted in the present invention is: a kind of solar module low resistance connected mode, described solar module is divided into A and two zones of B, in described B zone, the positive electrode of battery sheet is vertical with back electrode to be printed, adjacent battery strings by battery sheet in the B zone just, the interconnector perpendicular interconnection at the back side; The parallel printing with back electrode of the positive electrode of battery sheet in described a-quadrant, adjacent battery strings connects by busbar in the a-quadrant.
Further, in order effectively to shorten the bus bar length of whole battery group string in the a-quadrant, shorten the length of output cable, be provided with split type terminal box in the a-quadrant of the present invention, and each terminal box inside is provided with bypass diode.
The present invention also provides this solar module low resistance manufacture craft simultaneously, may further comprise the steps:
1) solar module is divided into two zones of A, B;
2) positive electrode to the battery sheet in the B zone carries out vertical the printing with back electrode;
3) use interconnector to carry out single weldering of front electrode to the battery sheet in the B zone;
4) two adjacent in B zone battery sheets are vertically placed after finishing, carried out series welding in the series welding template;
5) positive electrode with two the adjacent battery sheets in the a-quadrant carries out parallel printing with back electrode;
6) battery sheet adjacent in the a-quadrant is connected in series by busbar.
The invention has the beneficial effects as follows: can effectively reduce more than the bus bar length 1330mm, shorten more than the length 636mm in connector cable line (4mm2 line footpath), can reduce assembly series resistance 15~20m Ω generally, and then under the prerequisite that reduces material cost, single component can improve power output 1~1.3W.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is conventional solar module front view;
Fig. 2 is low resistance connected mode solar module front view of the present invention;
Among the figure: 1, conventional batteries; 2, interconnector; 3, busbar; 4, isolate backboard; 5, output cable; 6, integrated form terminal box; 7, just, the vertical printed battery of back electrode; 8, split type terminal box.
Embodiment
The present invention is further detailed explanation 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 only is described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 2, with 6 the string 6 polycrystal silicon cell assemblies be example, a kind of solar module low resistance connected mode, described solar module is divided into A and two zones of B, the battery 7 in B zone adopts positive electrode, printed design that back electrode is vertical at the silk screen printing end, adjacent cell ganged up in B zone battery sheet just, interconnector 2 perpendicular interconnections at the back side, thereby the busbar in B zone is saved.The battery of a-quadrant still adopts traditional positive electrode, the parallel mode of printing of back electrode.
Split type terminal box 8 designs are adopted at the lead-out wire position of a-quadrant, assembly, can effectively shorten busbar 3 length of whole battery group string, shorten the length of output cable 5; Split type terminal box is provided with isolation by plate 5.Each split type terminal box 8 inside is provided with bypass diode.
Manufacture craft of the present invention is: 1) solar module is divided into two zones of A, B; 2) positive electrode to the battery sheet in the B zone carries out vertical the printing with back electrode; 3) use interconnector to carry out single weldering of front electrode to the battery sheet in the B zone; 4) two adjacent in B zone battery sheets are vertically placed after finishing, carried out series welding in the series welding template; 5) positive electrode with two the adjacent battery sheets in the a-quadrant carries out parallel printing with back electrode; 6) battery sheet adjacent in the a-quadrant is connected in series by busbar.
The welding of battery sheet can adopt contact welding, thermal radiation, hot blast welding or conducting resinl/conductive tape bonding, lamination, lamination, clean, frame up, manufacture craft that test and packaging process are same as common solar module.
Shown in Figure 1 is conventional crystal silicon solar cell assembly, the front electrode of battery sheet 1 is parallel with the position of backplate, in the process that is connected in series of adjacent cell string, certainly will introduce extra busbar like this, thereby increase the series resistance of assembly, cause extra power ohmic loss.And on the other hand, the integrated form terminal box 6 of assembly is arranged on assembly minor face midline position usually, and this design not only can increase the length of exit busbar, and can increase the length of cable 5.
Therefore, compared with prior art, adopt the battery plate electrode design of B of the present invention zone and assembly connecting structure, can improve conversion efficiency and the power output of solar module, for the making of high efficiency crystal silicon solar assembly provides a cover solution.
Just the specific embodiment of the present invention of describing in the above specification, various not illustrating is construed as limiting flesh and blood of the present invention, the person of an ordinary skill in the technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence of an invention and scope.