CN205264721U

CN205264721U - Spotlight solar cell's front grid line structure

Info

Publication number: CN205264721U
Application number: CN201521058900.8U
Authority: CN
Inventors: 黄忠
Original assignee: SICHUAN ZSUN SOLAR ENERGY DEVELOPMENT CO LTD
Current assignee: SICHUAN ZSUN SOLAR ENERGY DEVELOPMENT CO LTD
Priority date: 2015-12-18
Filing date: 2015-12-18
Publication date: 2016-05-25
Anticipated expiration: 2025-12-18

Abstract

The utility model discloses a spotlight solar cell's front grid line structure, including solar battery, effective light receiving area on solar battery surface is circularly, the grid line that solar battery is last, the part outside effective light receiving area is given first place to be provided with in effective light receiving area and use the solar battery mid point to be radial evenly distributed's a plurality of thin grid line as the center and use the thin grid line of a plurality of endocentric annular that the solar battery mid point distributes from inside to outside as the center, the thin grid line of annular and thin grid line link to each other in intercrossing department, and the light energy of kicking into effective light receiving area effectively doubly converts the electric energy into, reach on the main grid line after photoelectric conversion's thin grid line of current conveyance and the thin grid line of annular are collected. The utility model discloses can improve solar battery's availability, increase the regional produced high current density's of center align high intensity collection and current -carrying ability, make the grid line of collecting photo -generated current on the photic area bear the weight of the electric current uniformly simultaneously, avoid on the local grid line the too big and problem of production of current density.

Description

A kind of front gate line structure of concentrating solar battery

Technical field

The utility model belongs to technical field of solar utilization technique, particularly a kind of front gate line structure of concentrating solar battery.

Background technology

That solar energy has is clean, No Assets regional limits, concerning the mankind forever without the good characteristic such as exhausted, be more and more subject to people's favor, wherein solar energy photovoltaic utilization is that the sunshine technology that is directly changed into electric energy by photovoltaic device is especially noticeable.

In traditional photovoltaic solar battery component, solar cell use amount is larger, causes the cost of electricity-generating of photovoltaic generation to exceed several times compared with conventional power generation usage cost, has therefore limited the scale application of photovoltaic power generation technology, has restricted the development of whole industry. In order to save the use amount of solar cell, reduce the production cost of photovoltaic solar battery component, the technological means that adopt optically focused in existing photovoltaic solar battery component, are irradiated on high efficiency multijunction solar cell after light is converged, to reduce the consumption of solar cell again.

As shown in Figure 1, the designed light-receiving area of multijunction solar cell of market is generally rectangle at present, its main grid line 3 is distributed in both sides, and in the middle of battery, have many for collecting the thin grid line 4 of photogenerated current, and thin grid line is evenly arranges, carry out connection in series-parallel by main grid line and other solar cells and be combined, obtain required voltage and current. this design is for more reasonable by the square uniform light spots forming after condenser system, but the hot spot 7 that as spherical in some or the non-sphere curved surface optical system reality of other optical system is converged is shaped as sub-circular, and the Energy distribution of its hot spot is also inhomogeneous, generally present center strong, the trend that edge is weak, therefore photogenerated current can not be effectively collected in the design of the light area of this rectangle, on the contrary can be due to hot spot inhomogeneous, central area grid line is poor and cause the loss of battery efficiency to the capacity gauge of electric current, as shown in Figure 2, when subcircular hot spot after condenser system is irradiated to solar battery surface, can see in such cases, the light-receiving area utilization rate of solar battery surface is not high, and the light intensity of light-receiving area central area is very big, and edge a little less than, and the thin grid line of this kind of design is equally distributed, therefore can cause the current density of the thin grid line carrying in center light strength larger, thereby cause loss in efficiency. while is because the cost of the multijunction solar cell of employing MOCVD explained hereafter is very high, and the low rising that causes cost of the utilization rate of light-receiving area.

Utility model content

Goal of the invention of the present utility model is: for the problem of above-mentioned existence, provide a kind of front gate line structure that can improve solar cell effective rate of utilization and the concentrating solar battery to electric current collection and current capacity.

The technical solution of the utility model is achieved in that a kind of front gate line structure of concentrating solar battery, comprise solar cell, it is characterized in that: effective light area of described solar battery surface is rounded, on described solar cell, effectively the part outside light area is main grid line, in described effective light area, be provided with the multiple concentric annular thin grid line that is radial equally distributed some thin grid lines and distributes from inside to outside centered by solar cell mid point centered by solar cell mid point, described annular thin grid line is connected at mutual infall with thin grid line, the luminous energy that is injected into effective light area is effectively doubly converted to electric energy, the electric current of opto-electronic conversion reaches on main grid line after collecting by thin grid line and annular thin grid line.

The front gate line structure of concentrating solar battery described in the utility model, described in it, multiple concentric annular thin grid lines are not equi-spaced apart layout, and its annular thin moire grids density the closer to center, effective light area is larger.

The front gate line structure of concentrating solar battery described in the utility model, its center at described solar cell is provided with the thin grid line of central circular, in the thin grid line of described central circular, on the solar cell of correspondence, be not provided with thin grid line, radial some thin grid lines are all connected with the thin grid line of central circular.

The utility model adopts circular light-receiving area design, the situation that the light spot shape being converged for as spherical in some or the non-sphere curved surface optical system of optical system is sub-circular, the effective rate of utilization of its solar cell is improved, simultaneously, due to the design of thin grid line, make the closer to the density of the grid line at center, light area larger, this just increases collection and the current capacity of the high current density that high light intensity region, Liao Dui center produces, improve the efficiency of solar cell, and utilize the cross-over design of radial thin grid line and annular thin grid line, can by local high current density by around annular thin grid line be evenly transmitted on radial thin grid line, thereby make to collect on light-receiving area the grid line loaded current equably of photogenerated current, thereby and can not cause the excessive and infringement that reduces battery efficiency or cause local high temperature to cause battery of current density on local grid line.

Brief description of the drawings

Fig. 1 is the structural representation of existing multijunction solar cell surface grid line.

Fig. 2 is that rounded optically focused hot spot is radiated at the schematic diagram on existing multijunction solar cell.

Fig. 3 is structural representation of the present utility model.

Fig. 4 is that rounded optically focused hot spot is radiated at the schematic diagram on the utility model solar cell.

Mark in figure: 1 is solar cell, 2 is effective light area, and 3 is main grid line, and 4 is thin grid line, and 5 is annular thin grid line, the thin grid line of annulus centered by 6,7 is hot spot.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

As shown in Figures 3 and 4, a kind of front gate line structure of concentrating solar battery, comprise solar cell 1, effective light area 2 on described solar cell 1 surface is rounded, the hot spot 7 being converged for as spherical in some or the non-sphere curved surface optical system of optical system is shaped as the situation of sub-circular, can make the effective rate of utilization of solar cell be improved, on described solar cell 1, effectively the part outside light area 2 is main grid line 3, in described effective light area 2, be provided with the multiple concentric annular thin grid line 5 that is radial equally distributed some thin grid lines 4 and distributes from inside to outside centered by solar cell 1 mid point centered by solar cell 1 mid point, described multiple concentric annular thin grid line 5 is not equi-spaced apart and arranges, its annular thin grid line 5 density the closer to 2 centers, effective light area are larger, described annular thin grid line 5 is connected at mutual infall with thin grid line 4, the luminous energy that is injected into effective light area 2 is effectively doubly converted to electric energy, the electric current of opto-electronic conversion reaches on main grid line 3 after collecting by thin grid line 4 and annular thin grid line 5. due to the arrangement of radial thin grid line and annular thin grid line, make the closer to center, light area, the density of thin grid line is larger, present the strong and trend situation a little less than edge in center for the Energy distribution of hot spot, increased like this collection and the current capacity of the high current density that the thin grid line of solar battery surface produces high light intensity region, center, and be not each to uniformly owing to being irradiated to the subcircular hot spot of battery light area by condenser system, therefore utilize the cross-over design of radial thin grid line and annular thin grid line, can by local high current density by around annular thin grid line be evenly transmitted on radial thin grid line, thereby make to collect on light-receiving area the grid line loaded current equably of photogenerated current, thereby and can not cause the excessive and infringement that reduces battery efficiency or cause local high temperature to cause battery of current density on local grid line.

Wherein, be provided with the thin grid line 6 of central circular in the center of described solar cell 1, on the solar cell 1 of the thin grid line 6 interior correspondences of described central circular, be not provided with thin grid line, radial some thin grid lines 4 are all connected with the thin grid line 6 of central circular. Because the spot center light intensity after converging is high, and thin grid line forms cross knot chalaza in central area, because thin grid line has reflex to the light that converges that incides solar battery surface, and the light intensity at center is high, will cause so thin grid line, in the cross knot chalaza at light-receiving area center, high-intensity incident light is had to obvious reflex. By the central area of solar cell is designed to white space, be, in the thin grid line of central circular, thin grid line is not set, be conducive to reduce the reflecting effect of thin grid line to incident light, simultaneously due to the thin grid line of central circular around, also the collection of the photogenerated current that central area is produced can be ensured, thereby the efficiency of solar cell can be further improved.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. the front gate line structure of a concentrating solar battery, comprise solar cell (1), it is characterized in that: effective light area (2) on described solar cell (1) surface is rounded, on described solar cell (1), effectively the part outside light area (2) is main grid line (3), in described effective light area (2), be provided with the multiple concentric annular thin grid line (5) that is radial equally distributed some thin grid lines (4) and distributes from inside to outside centered by solar cell (1) mid point centered by solar cell (1) mid point, described annular thin grid line (5) is connected at mutual infall with thin grid line (4), the luminous energy that is injected into effective light area (2) is effectively doubly converted to electric energy, the electric current of opto-electronic conversion reaches on main grid line (3) after collecting by thin grid line (4) and annular thin grid line (5).

2. the front gate line structure of concentrating solar battery according to claim 1, it is characterized in that: described multiple concentric annular thin grid lines (5) are not equi-spaced apart to be arranged, its annular thin grid line (5) density the closer to center, effective light area (2) is larger.

3. the front gate line structure of concentrating solar battery according to claim 1 and 2, it is characterized in that: be provided with the thin grid line of central circular (6) in the center of described solar cell (1), in the thin grid line of described central circular (6), on the solar cell (1) of correspondence, be not provided with thin grid line, radial some thin grid lines (4) are all connected with the thin grid line of central circular (6).