Solar module
Technical field
This utility model relates to technical field of solar batteries, particularly relates to a kind of solar module.
Background technology
At present, the improved efficiency of solar module on the market to a bottleneck stage, and existing photovoltaic module to improved efficiency almost without contribution. Generally, component efficiency far below cell piece efficiency, can have some questions to affect its difference: the actual power area of (1) assembly is less than assembly area; (2) ohmic loss in assembly; (3) assembly is subject to light loss; (4) cell piece mismatch loss.
In traditional solar module, adjacent cell piece adopts welding interconnection, the version of this kind of interconnection, determines the first two loss form in assembly inevitable.
Utility model content
Based on this, it is necessary to provide the solar module of a kind of not generating area that can reduce in assembly and ohmic loss.
A kind of solar module, including at least two set of cells being serially connected, described set of cells includes the cell piece tandem that at least two is connected in parallel with each other, described cell piece tandem includes 20��70 battery cutting blades being connected in series with each other, described battery cutting blade is formed by solar battery sheet cutting, and in same cell piece tandem, adjacent two described battery cutting blades are overlapping is connected in series.
Above-mentioned solar module, overlapping connection between adjacent battery cutting blade, in the cell piece tandem therefore formed, battery cutting blade is mutually arranged closely, and generating area is not few. Connecting additionally, overlapping between adjacent battery cutting blade, the area of contact conduction is relatively big, reduces ohmic loss.
Wherein in an embodiment, the area of the described at least two cell piece forming same cell piece tandem is identical.
Wherein in an embodiment, described cell piece includes the front for absorbing light radiation and the back side arranged dorsad relative to described front, described front is provided with the main grid for collecting electric current, the described back side is provided with back electrode, described main grid and back electrode projection on front or the back side and offsets one from another.
Wherein in an embodiment, also include the rosette being connected with described battery cutting blade, in described rosette, be provided with diode.
Wherein in an embodiment, including 2 set of cells being serially connected, described set of cells includes 6 cell piece tandems parallel with one another, and described cell piece tandem includes 34 battery cutting blades being serially connected.
Wherein in an embodiment, including 4 set of cells being serially connected, described set of cells includes 3 cell piece tandems parallel with one another, and described cell piece tandem includes 34 battery cutting blades being serially connected.
Wherein in an embodiment, including 6 set of cells being serially connected, described set of cells includes 2 cell piece tandems parallel with one another, and described cell piece tandem includes 34 battery cutting blades being serially connected.
Wherein in an embodiment, including 2 set of cells being serially connected, described set of cells includes 8 cell piece tandems parallel with one another, and described cell piece tandem includes 34 battery cutting blades being serially connected.
Wherein in an embodiment, including 4 set of cells being serially connected, described set of cells includes 4 cell piece tandems parallel with one another, and described cell piece tandem includes 34 battery cutting blades being serially connected.
Wherein in an embodiment, including 8 set of cells being serially connected, described set of cells includes 2 cell piece tandems parallel with one another, and described cell piece tandem includes 34 battery cutting blades being serially connected.
Accompanying drawing explanation
Fig. 1 is the front schematic view of cell piece tandem;
Fig. 2 is the side schematic view of cell piece tandem;
Fig. 3 is the front schematic view of the solar module of embodiment one;
Fig. 4 is the schematic rear view of the solar module of embodiment one;
Fig. 5 is the circuit diagram of the solar module of embodiment one;
Fig. 6 is the front schematic view of the solar module of embodiment two;
Fig. 7 is the schematic rear view of the solar module of embodiment two;
Fig. 8 is the circuit diagram of the solar module of embodiment two;
Fig. 9 is the front schematic view of the solar module of embodiment three;
Figure 10 is the schematic rear view of the solar module of embodiment three;
Figure 11 is the circuit diagram of the solar module of embodiment three;
Figure 12 is the front schematic view of the solar module of embodiment four;
Figure 13 is the schematic rear view of the solar module of embodiment four;
Figure 14 is the circuit diagram of the solar module of embodiment four;
Figure 15 is the front schematic view of the solar module of embodiment five;
Figure 16 is the schematic rear view of the solar module of embodiment five;
Figure 17 is the circuit diagram of the solar module of embodiment five;
Figure 18 is the front schematic view of the solar module of embodiment six;
Figure 19 is the schematic rear view of the solar module of embodiment six;
Figure 20 is the circuit diagram of the solar module of embodiment six.
Detailed description of the invention
Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail. Elaborate a lot of detail in the following description so that fully understanding this utility model. But this utility model can be implemented being much different from alternate manner described here, those skilled in the art can do similar improvement when without prejudice to this utility model intension, and therefore this utility model is not by the restriction of following public specific embodiment.
It should be noted that be referred to as " being fixed on " another element when element, it can directly on another element or can also there is element placed in the middle. When an element is considered as " connection " another element, it can be directly to another element or may be simultaneously present centering elements.
Unless otherwise defined, all of technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model are generally understood that. The purpose describing specific embodiment it is intended merely to herein, it is not intended that in restriction this utility model at term used in the description of the present utility model. Term as used herein " and/or " include the arbitrary and all of combination of one or more relevant Listed Items.
Below in conjunction with accompanying drawing, describe the better embodiment of solar module of the present invention in detail.
The present invention provides a kind of solar module, it includes at least two set of cells being serially connected, set of cells includes the cell piece tandem that at least two is connected in parallel with each other, cell piece tandem includes 20��70 battery cutting blades being connected in series with each other, battery cutting blade is formed by solar battery sheet cutting, and in same cell piece tandem, adjacent two battery cutting blades are overlapping is connected in series. Adjacent battery cutting blade is overlapping to be connected, and closely, generating area is not few for the battery cutting blade arrangement in the cell piece tandem therefore formed. Connecting additionally, overlapping between adjacent battery cutting blade, the area of contact conduction is relatively big, reduces ohmic loss.
Ginseng Fig. 1, for the front schematic view of cell piece tandem in the solar module of the present invention. Fig. 2 be the present invention solar module in the side schematic view of cell piece tandem. Cell piece tandem 100 is overlapped by the battery cutting blade 110 of more than 2 and is in series. Fig. 1 and Fig. 2 illustrates for four and three battery cutting blade series connection respectively, but the quantity of battery cutting blade is certainly not limited to above-mentioned number, it is also possible to be any number between 20��70. The lower limit of this utility model battery cutting blade quantity is the output voltage ensureing whole solar module, thus dropping lower powered loss, and the upper limit of battery cutting blade quantity is ensure reliability and the safety of solar module, it is to avoid overtension causes the diode breakdown in rosette.
Ginseng Fig. 2, each battery cutting blade 110 includes the front 112 for absorbing radiation and the back side 114 arranged dorsad relative to front 112. Front 112 is provided with the main grid 1122 for collecting electric current. The back side 114 is provided with back electrode 1142. Main grid 1122 and the back electrode 1142 projection on front 112 or the back side 114 offset one from another. In Fig. 2, main grid 1122 and back electrode 1142 lay respectively at the both sides of battery cutting blade 110. The width of main grid 1122 and back electrode 1142 and identical length etc.
When the series connection of multiple battery cutting blades 110 forms cell piece tandem, join Fig. 2, be followed successively by first cell piece, second cell piece, the 3rd cell piece, the 4th cell piece from left to right. First, first cell piece is just put, then that the back electrode 1142 (being positioned at the left side of second cell piece) at the second cell piece back side is overlapping with the main grid 1122 (being positioned on the right side of first cell piece) of first cell piece. Similarly, the back electrode 1142 (being positioned on the left of the 3rd cell piece) of the 3rd cell backside is overlapping with the main grid 1122 (being positioned on the right side of second cell piece) of second cell piece.The back electrode 1142 (being positioned on the left of the 4th cell piece) at the 4th cell piece back side is overlapping with the main grid 1122 (being positioned on the right side of the 3rd cell piece) of the 3rd cell piece. When connecting when there being greater number of battery cutting blade 110 to need, it is repeatedly performed with reference to said method.
Finally, when all of overlapping series connection of battery cutting blade 110 is complete, the front of cell piece tandem 100 is as shown in Figure 1. In conjunction with Fig. 2, it will be seen that the marginal position of adjacent cell cutting blade 110 overlaps and is in overlapping state, this connected mode makes to be absent from gap between adjacent two battery cutting blades 110, arrangement is comparatively tight, substantially increases the effective area of cell piece tandem 100. And solar module is made up of multiple cell piece tandems 100, therefore between multiple cell piece tandems 100, connected mode is identical, effective generating area of whole solar module is also greatly increased, thus improve the conversion efficiency of solar module.
Additionally, relatively adjacent cell sheet utilizes welding to interconnect in traditional scheme, in the present invention, the main grid 1122 of adjacent cell sheet is overlapping with back electrode 1142, increases the conductive area between adjacent cell sheet, it is possible to play the purpose reducing ohmic loss.
In multiple cell piece tandems 100 of solar module, the area of the battery cutting blade 110 forming same cell piece tandem 100 is identical. Battery cutting blade 110 can be polycrystalline silicon battery plate, Monocrystalline silicon cell piece, hull cell sheet or crystal silicon composite battery sheet, and it can by obtaining point cuttings such as solar battery sheets. For example, it is possible to 6 cun of crystal silicon solar cell sheets are carried out laser scribing cut into 3,4 or 5 deciles. Certainly, it is not limited to above-mentioned each decile, it is also possible to carry out some other parts of deciles. Then screen, can make in cell piece tandem 100 the efficiency concordance of each battery cutting blade 110, matching more preferably, thus the work efficiency of whole solar module also can be improved.
In the present invention, main grid 1122 and back electrode 1142 overlap, and tin-lead soldering paste etc. can be adopted therebetween to connect as conductive material. All adopt the conductive materials such as tin-lead soldering paste between battery cutting blade 110 used, play the effect of interconnection.
Additionally, solar module of the present utility model also includes the rosette being connected with battery cutting blade, in rosette, it is provided with diode. Owing to solar battery sheet has hot spot characteristic, namely under certain condition, solar battery sheet shielded in a series arm, by being taken as load consumption, other have energy produced by the solar cell piece of illumination. Shielded solar module now can generate heat, then influence whether the efficiency of a string solar battery sheet, thus causing the inefficient of whole solar module. Therefore, by the diodes in parallel in the set of cells of solar module and rosette, so when the battery strings in some set of cells lists the low hot spot phenomenon of existing electric current, electric current can from diode process, to avoid energy loss.
The solar module of the present invention, is made up of multiple aforesaid cell pieces series connection 100, describes concrete connection scheme below in conjunction with accompanying drawing.
Embodiment one
Ginseng Fig. 3 to Fig. 5, solar module is in series by 2 set of cells. Each set of cells includes 6 cell piece tandems 100 in parallel. Each cell piece tandem 100 comprises the battery cutting blade 110 of 34 overlapping series connection.Battery cutting blade 110 is carried out 5 grades by a solar battery sheet and divides cutting to form.
In the present embodiment, 2 set of cells being connected in parallel to a solar battery component junction box 200, this solar battery component junction box 200 is provided with a diode 210, and therefore, whole solar module is a diode 210 in parallel altogether. When the low hot spot phenomenon of electric current occurs in some cell piece tandem 100, electric current is process from diode 210, to avoid energy loss.
Battery cutting blade 110 is that point cuttings such as the solar battery sheet to traditional full wafer prepare, therefore its area is less than the solar battery sheet of full wafer, therefore the output voltage of single battery cutting blade 110 is consistent with the solar battery sheet voltage of full wafer, but electric current is less than conventional solar cell sheet. In the present embodiment, each cell piece tandem 100 is in series by multiple battery cutting blades 110, and multiple serial battery 100 become again a set of cells side by side simultaneously. The solar battery sheet that battery cutting blade 110 is 1/5 size of the present embodiment. Assuming that the electric current that complete solar battery sheet passes through is 1, voltage is 1. The electric current then produced in battery cutting blade 110 is 1/5, and voltage is 1. Each cell piece tandem 100 by multiple cell pieces, Fig. 5 be in 34, then cumulative electric current is 34 �� 1/5, and voltage is 1. Although namely the electric current of single battery sheet is less, but by the connection in series-parallel of cell piece, the output voltage of set of cells and electric current and traditional components being made close, thus need not change requirement of system design.
Embodiment two
Ginseng Fig. 6 to Fig. 8, the present embodiment and embodiment one are distinctive in that, the solar module of the present embodiment includes 4 set of cells being connected in series with each other, each set of cells includes 3 cell piece tandems 100 being connected in parallel with each other, and each cell piece tandem 100 includes 34 battery cutting blades 110 being connected in series with each other.
Additionally, in the present embodiment, each two set of cells is connected in parallel to a solar battery component junction box 200, this solar battery component junction box 200 is provided with a diode 210, and therefore, whole solar module is two diodes 210 in parallel altogether. When the low hot spot phenomenon of electric current occurs in some cell piece tandem 100, electric current is process from diode 210, to avoid energy loss.
Embodiment three
Ginseng Fig. 9 to Figure 11, the present embodiment and embodiment one are distinctive in that, the solar module of the present embodiment includes 6 set of cells being connected in series with each other, each set of cells includes 2 cell piece tandems 100 being connected in parallel with each other, and each cell piece tandem 100 includes 34 battery cutting blades 110 being connected in series with each other.
Additionally, in the present embodiment, each two set of cells is connected in parallel to a solar battery component junction box 200, this solar battery component junction box 200 is provided with a diode 210, and therefore, whole solar module is altogether and ter diode 210. When the low hot spot phenomenon of electric current occurs in some cell piece tandem 100, electric current is process from diode 210, to avoid energy loss.
Embodiment four
Ginseng Figure 12 to Figure 14, the present embodiment and embodiment one are distinctive in that, the solar module of the present embodiment includes 2 set of cells being connected in series with each other, each set of cells includes 8 cell piece tandems 100 being connected in parallel with each other, and each cell piece tandem 100 includes 34 battery cutting blades 110 being connected in series with each other.
Additionally, in the present embodiment, two set of cells are connected in parallel to a solar battery component junction box 200, and this solar battery component junction box 200 is provided with a diode 210, therefore, a whole solar module diode 210 in parallel altogether.When the low hot spot phenomenon of electric current occurs in some cell piece tandem 100, electric current is process from diode 210, to avoid energy loss.
Embodiment five
Ginseng Figure 15 to Figure 17, the present embodiment and embodiment one are distinctive in that, the solar module of the present embodiment includes 4 set of cells being connected in series with each other, each set of cells includes 4 cell piece tandems 100 being connected in parallel with each other, and each cell piece tandem 100 includes 34 battery cutting blades 110 being connected in series with each other.
Additionally, in the present embodiment, each two set of cells is connected in parallel to a solar battery component junction box 200, this solar battery component junction box 200 is provided with a diode 210, and therefore, whole solar module is two diodes 210 in parallel altogether. When the low hot spot phenomenon of electric current occurs in some cell piece tandem 100, electric current is process from diode 210, to avoid energy loss.
Embodiment six
Ginseng Figure 18 to Figure 20, the present embodiment and embodiment one are distinctive in that, the solar module of the present embodiment includes 8 set of cells being connected in series with each other, each set of cells includes 2 cell piece tandems 100 being connected in parallel with each other, and each cell piece tandem 100 includes 34 battery cutting blades 110 being connected in series with each other.
Additionally, in the present embodiment, each two set of cells is connected in parallel to a solar battery component junction box 200, this solar battery component junction box 200 is provided with a diode 210, and therefore, whole solar module is altogether and quarter diode 210. When the low hot spot phenomenon of electric current occurs in some cell piece tandem 100, electric current is process from diode 210, to avoid energy loss.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope. It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model. Therefore, the protection domain of this utility model patent should be as the criterion with claims.