JP6880885B2 - Power generation panel - Google Patents

Description

The present invention relates to a power generation panel that receives and generates laser light having an arbitrary intensity distribution.

In recent years, attention has been focused on the introduction of electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs) in order to reduce carbon dioxide emissions. Some of these electric vehicles have a power generation panel attached to the roof to enable power supply even while the vehicle is running or stopped.

An electric vehicle having a power generation panel on the roof, in addition to supplying power by irradiating sunlight, for example, stops at a charging station to charge a secondary battery. The charging station is equipped with a light irradiation device that irradiates the power generation panel with light. At the charging station, the light irradiation device irradiates the power generation panel with light, and the electric power generated by the power generation panel is used to supply power to the vehicle.

Generally, a photovoltaic power generation panel is configured on the assumption that it irradiates sunlight (parallel light). However, the light irradiation device of the charging station irradiates artificial diffused light such as laser light.

The power generation efficiency of the power generation panel is lower when irradiated with artificial diffused light than when irradiated with sunlight. This is because sunlight has a uniform light intensity distribution, but artificial diffused light has a non-uniform light intensity distribution. In order to suppress a decrease in power generation efficiency when irradiating artificial diffused light, as described in Patent Document 1, optics for converting diffused light into light having a uniform intensity distribution and irradiating the power generation panel. It is conceivable to use a system.

Japanese Unexamined Patent Publication No. 2005-18013

However, if an optical system as described in Reference 1 is installed in the light irradiation device of the charging station, the size of the light irradiation device is increased and the installation cost of the charging station is significantly increased.

The present invention has been made to solve the above-mentioned problems of the conventional technique, and can improve the power generation efficiency even when receiving a laser beam having an arbitrary intensity distribution to generate power. The purpose is to provide a power generation panel.

The power generation panel for achieving the above object is a power generation panel that receives and generates power by receiving laser light having an intensity distribution having a normal distribution, and the power generation panel has a plurality of power generation modules having different light receiving areas, and all of them have. The power generation modules are electrically connected in series, and the light receiving area of the power generation module is arranged in a region relatively weaker than the power generation module arranged in the region where the intensity of the laser beam is relatively strong. Larger, the plurality of power generation modules are arranged in a grid pattern in the irradiation region of the laser beam.
Further, the power generation panel for achieving the above object is a power generation panel that receives and generates power by receiving laser light having an intensity distribution having a normal distribution, and the power generation panel has a plurality of power generation modules having different light receiving areas. All the power generation modules are electrically connected in series, and the light receiving area of the power generation module is arranged in a region relatively weaker than the power generation module arranged in the region where the intensity of the laser beam is relatively strong. The modules are larger, with each power generation module having one or more power generation cells, all of which are electrically connected in parallel for each power generation module.
Further, the power generation panel for achieving the above object is a power generation panel that receives and generates power by receiving laser light having an intensity distribution having a normal distribution, and the power generation panel has a plurality of power generation modules having different light receiving areas. All the power generation modules are electrically connected in series, and the light receiving area of the power generation module is arranged in a region relatively weaker than the power generation module arranged in the region where the intensity of the laser beam is relatively strong. The module is larger, and the laser beam is a stack of multiple laser beams.

According to the power generation panel having the above configuration, the power generation efficiency can be improved even when the laser beam having an arbitrary intensity distribution is irradiated, and high-efficiency power generation becomes possible.

It is a schematic block diagram of the charging station provided with a light irradiation device. It is an intensity distribution map of the laser beam irradiated from the light irradiation apparatus. It is a layout drawing of the power generation cell which constitutes a power generation panel. It is a figure which shows the state which the laser beam is irradiated to the power generation panel. It is a figure which shows the power generation amount of each power generation cell which constitutes a power generation panel. It is a figure which shows the power generation module and the power generation cell of the power generation panel which concerns on Embodiment 1. FIG. It is a figure which shows the electric connection state of the power generation module and the power generation cell in the power generation panel of FIG. It is a figure which shows the power generation module and the power generation cell of the power generation panel which concerns on Embodiment 2. It is a figure which shows the electric connection state of the power generation module and the power generation cell in the power generation panel of FIG. It is a figure which shows the power generation module and the power generation cell of the power generation panel which concerns on Embodiment 3. It is a figure which shows the electric connection state of the power generation module and the power generation cell in the power generation panel of FIG. It is a figure which shows the power generation module and the power generation cell of the power generation panel which concerns on Embodiment 4. FIG. It is a figure which shows the electrical connection state of the power generation module and the power generation cell in the power generation panel of FIG. It is a figure which shows the power generation panel which concerns on Embodiment 5 to generate power by irradiating a plurality of laser beams.

Next, an embodiment of the power generation panel according to the present invention will be described separately from [Embodiment 1] to [Embodiment 5] with reference to the drawings. FIG. 1 is a schematic configuration diagram of a charging station provided with a light irradiation device.

In recent years, the development of electric vehicles equipped with a power generation panel on the roof has been promoted. Charging of this type of electric vehicle is performed by irradiating a power generation panel with light from a light irradiation device at a charging station.

As shown in FIG. 1, the charging station 100 has a charging space 120 for charging the electric vehicle 110. A light irradiation device 200 is installed in the charging space 120. A power generation panel 300 is provided on the roof of the electric vehicle 110.

As shown in FIG. 1, when charging the electric vehicle 110, the electric vehicle 110 is stored in the charging space 120 and the charging is instructed. When the charging is instructed, the light irradiation device 200 irradiates the power generation panel 300 with the laser beam 250 having a specific (for example, normally distributed) intensity distribution. The power generation panel 300 generates electricity by the irradiated laser beam 250 and charges the secondary battery of the electric vehicle 110.

FIG. 2 is an intensity distribution diagram of the laser beam 250 emitted from the light irradiation device 200. The laser beam 250 emitted from the light irradiation device 200 is obtained by reflecting the VCSEL type semiconductor laser beam with a mirror. For example, the size of the irradiation region is 450 mm in width and 400 mm in length.

The laser beam 250 emitted from the light irradiation device 200 does not have a constant intensity on the light receiving surface of the power generation panel 300, but is two-dimensional from the center of the light receiving surface according to a change in the normal distribution as shown in FIG. It has a distribution in which the intensity decreases radially.

The intensity distribution diagram of FIG. 2 is a contour line representation of the average incident intensity on the light receiving surface of the power generation panel 300. In FIG. 2, the light intensity decreases from the white portion to the black portion. In the figure, the whitest part in the center has the highest light intensity, and the light intensity gradually decreases radially from the center.

Since the laser beam 250 is radiated from the light source, the irradiation shape is circular just below the light source. However, in FIG. 2, it has an elliptical shape. This is because the laser beam is emitted from a slightly oblique direction with respect to the power generation panel 300 because the angle at the time of mirror reflection is slightly tilted from the 90-degree direction.

In the first to fourth embodiments, the laser beam 250 in which the intensity distribution of the laser beam is a normal distribution is illustrated. However, the intensity distribution of the light source is not limited to the normal distribution, and may be any distribution other than the normal distribution. This is because the method for forming the power generation panel 300 according to the present invention can be applied to any laser beam having a specific intensity distribution.

FIG. 3 is a layout diagram of power generation cells constituting the power generation panel 300. As shown in FIG. 3, the power generation panel 300 is formed by arranging 30 power generation cells 301-330 in three rows of 10 each. Each power generation cell is the smallest unit that forms the power generation panel 300.

FIG. 4 is a diagram showing a state in which the power generation panel 300 is irradiated with the laser beam 250. FIG. 5 is a diagram showing the amount of power generated by each of the power generation cells 301-330 constituting the power generation panel 300. The arrangement positions of the power generation cells 301-330 in FIG. 3 and the positions of the numbers indicating the amount of power generation in FIG. 5 correspond to each other. For example, the power generation amount of the power generation cell 313 is 3.27 W, and the power generation amount of the power generation cell 327 is 1.92 W.

As described with reference to FIG. 2, the laser beam 250 has a normal distribution of intensity distribution. Generally, the higher the intensity of the laser beam 250, the larger the amount of power generated. Therefore, as shown in FIG. 5, the amount of power generated by each of the power generation cells 301-330 varies depending on the arrangement location. As shown in FIG. 5, the amount of power generated by the power generation cells 313-318 arranged near the central portion of the laser beam 250 is larger than the amount of power generated by the other power generation cells. Further, the power generation amounts of the power generation cells 301, 302, 309, 310, 311, 320, 321, 322, 329, and 330 arranged near the outer peripheral portion of the laser beam 250 are compared with the power generation amounts of the other power generation cells. It becomes smaller.

Normally, all the power generation cells 301-330 constituting the power generation panel 300 are connected in series. However, as described above, if the power generation cells 301-330 having different power generation amounts are connected in series, the current supply capacity of each power generation cell is different, so that the total power generation output of the power generation panel 300 is obtained. Since the current is limited to the current value of the low output cell, the output efficiency of the panel is significantly reduced. The power generation efficiency (power generation energy of the power generation panel 300 / incident energy of the power generation panel 300) is 30% or more when power is generated by a single crystal silicon type solar cell panel using laser light having a uniform intensity distribution with a wavelength of 975 nm as a light source. Although the efficiency was obtained, the actual measurement result showed that the power generation efficiency was about 6%.

In the first to fourth embodiments described below, as shown in FIG. 5, the electrical connection of the power generation cells 301-330 having different power generation amounts is optimized to improve the overall power generation efficiency of the power generation panel 300. .. The method will be described below.

[Embodiment 1]
FIG. 6 is a diagram showing a power generation module and a power generation cell of the power generation panel according to the first embodiment. FIG. 7 is a diagram showing an electrical connection state of the power generation module and the power generation cell in the power generation panel of FIG.

When the power generation panel 300 is irradiated with the laser beam 250 as shown in FIG. 4, the power generation cells 301-330 constituting the power generation panel 300 have different power generation amounts as shown in FIG. In the first embodiment, power generation cells 301-330 having different power generation amounts are grouped, and their electrical connections are optimized to improve the overall power generation efficiency of the power generation panel 300.

As a result of repeated experiments, it was found that the following method is effective for improving the overall power generation efficiency of the power generation panel 300-1. First, a plurality of power generation modules are formed from each of the power generation cells 301 to 330, which are grouped so that the total amount of power generation is about the same. Next, the power generation cells in the power generation module are electrically connected in parallel to each other, and these plurality of power generation modules formed are electrically connected in series.

By connecting each of the power generation cells 301-330 in this way, the overall power generation efficiency of the power generation panel 300-1 can be maximized. Grouping of power generation cells 301-330 is performed by the following procedure.

First, with reference to the amount of power generated by each power generation cell in FIG. 5, a plurality of groups of power generation cells adjacent to each other are formed. Next, the total value of the amount of power generated by the power generation cells of each group is obtained. Finally, the optimum grouping is realized by exchanging the power generation cells of each group so that the value of (maximum-minimum) / (maximum + minimum) of the total value becomes the smallest. That is, they are grouped so that the variation in the amount of power generation between the groups does not become too large.

The result of grouping the power generation cells 301-330 by the above procedure is the power generation panel 300-1 shown in FIG. The arrangement of the power generation cells 301-330 of the power generation panel 300-1 in FIG. 6 is consistent with the arrangement of the power generation panel 300 in FIG.

As shown in FIG. 6, the power generation cells 301-305 form a power generation module G350, which is a group of the power generation cells 301-305. The total amount of power generated by the power generation cells 301-305 forming the power generation module G350 is 8.8 W. Similarly, the power generation cells 306-310 form the power generation module G360. The amount of power generated by the power generation module G360 is 8.9 W.

The power generation module G370 is formed by the power generation cells 311-313. The amount of power generated by the power generation module G370 is 6.6 W. The power generation modules G380 are formed by the power generation cells 314 and 315. The amount of power generated by the power generation module G380 is 8.1 W. The power generation modules G390 are formed by the power generation cells 316 and 317. The amount of power generated by the power generation module G390 is 8.2 W. The power generation cells 318-320 form the power generation module G400. The amount of power generated by the power generation module G400 is 6.6 W.

The power generation module G410 is formed by the power generation cells 321-325. The amount of power generated by the power generation module G410 is 6.5 W. The power generation cells 326-330 form the power generation module G420. The amount of power generated by the power generation module G420 is 6.9 W.

In the case of FIG. 6, the value of (maximum-minimum) / (maximum + minimum) in each power generation amount of the power generation modules G350-G420 is 8.9-6.5 / 8.9 + 6.5 = 2.4 /. 15.4 = 0.156. Looking at this value, it can be seen that the variation in the amount of power generation between the power generation modules G350 and G420 is kept small. Therefore, it can be said that the power generation panels 300-1 are ideally grouped.

The electrical connection states of the power generation modules G350-G420 in the power generation panel 300-1 of FIG. 6 and the power generation cells in each power generation module are as shown in FIG.

In the power generation panel 300-1 shown in FIG. 6, the power generation cells 301-330 of the power generation panel 300-1 are grouped into eight power generation modules G350-G420. The power generation modules G350-G420 are electrically connected in series as shown in FIG. Further, the power generation cells in each power generation module forming the power generation modules G350-G420 are electrically connected to each other in parallel. For example, in the power generation module G350, the power generation cells 301-305 forming the power generation module G350 are electrically connected to each other in parallel as shown in FIG. 7. Further, in the power generation module G400, the power generation panels 318-320 forming the power generation module G400 are electrically connected in parallel to each other as shown in FIG. 7.

As described above, when the power generation modules are electrically connected in series and the power generation cells in the power generation module are electrically connected in parallel with each other, the power generation efficiency of the power generation panel 300-1 is improved.

The power generation efficiency of the power generation panel 300-1 of FIG. 6 obtained by the experiment was as follows. First, in 6%, all power generation cells 301-330 were simply electrically connected in series without forming a power generation module. On the other hand, when the power generation cells 301-330 were connected in series and parallel as in the first embodiment, the ratio was 24%. It was demonstrated that by grouping the power generation cells 301-330 as in the first embodiment and devising the electrical connection, four times the power generation efficiency can be obtained as compared with the case where the power generation cells are not devised.

As described above, the power generation panel 300-1 according to the first embodiment receives the laser beam 250 having a normally distributed intensity distribution and generates power as shown in FIG. As shown in FIG. 6, the power generation panel 300-1 is divided into eight power generation modules G350-G420 having different light receiving areas. As shown in FIG. 7, all power generation modules G350-G420 are electrically connected in series. Each power generation module G350-G420 has a plurality of power generation cells, and the power generation cells of each power generation module G350-G420 are electrically connected in parallel.

Further, the light receiving area of the power generation modules G350-G420 is arranged in a region where the intensity of the laser beam 250 is relatively weaker than the light receiving areas of the power generation modules G380 and G390 arranged in a region where the intensity is relatively strong. , G360, G370, G400, G410, G420 have a larger light receiving area. In other words, the light receiving area of the power generation module G350-G420 is such that the light receiving area of the power generation modules G350, G360, G370, G400, G410, and G420 arranged on the outer peripheral side of the irradiation region of the laser beam 250 is arranged on the center side. It is larger than the light receiving area of the power generation modules G380 and G390.

By configuring the power generation panel 300-1 as described above, the power generation efficiency of the power generation panel 300-1 can be improved even when the laser beam 250 having a normally distributed intensity distribution is irradiated, and high-efficiency power generation can be performed. Becomes possible. Further, in order to improve the power generation efficiency of the power generation panel 300-1, it is not necessary to provide an optical system for making the intensity distribution of the laser beam 250 uniform, and it is possible to avoid an increase in size and cost of the light irradiation device. The optical system that makes the above intensity distribution uniform must withstand high energy such as laser, and it is very high because it is necessary to apply a heat-resistant light antireflection coating to the lens made of a material such as quartz. It is widely known that it is a costly component. In reality, the light transmission loss often ranges from 20 to 30%, and even if the cell efficiency is 20%, the actual panel efficiency is 24% even if the cell efficiency is 30%, and the efficiency is high even if the cost is applied. Since it is about the same, the practicality of the present invention is confirmed.

Further, since the intensity distribution of the laser beam 250 is a normal distribution, the intensity of the laser beam 250 is distributed point-symmetrically with respect to the optical axis. Therefore, the power generation cells 301-330 in the power generation panel 300-1 can be grouped regularly from the central portion of the power generation panel 300-1, and the power generation modules G350-G420 can be regularly grouped as shown in FIG. Can be placed in.

As shown in FIG. 6, in the plurality of power generation modules G350-G420, power generation modules having the same area are arranged on the power generation panel 300-1 in line symmetry with respect to the straight line L passing through the center of the laser beam 250. There is. In this way, if the power generation modules having the same area are arranged line-symmetrically with respect to the straight line L, the value of (maximum-minimum) / (maximum + minimum) of each power generation amount of the power generation modules G350-G420 can be reduced. It is possible to improve the power generation efficiency.

Further, the plurality of power generation modules G350-G420 are arranged in a grid pattern in the irradiation region of the laser beam 250 (see FIG. 4). When the power generation modules G350-G420 are arranged in a grid pattern in this way, the electrical connection between the power generation cells is not complicated and can be simplified.

The power generation cells 301-330 have the same shape and dimensions, and are arranged in a grid pattern in the irradiation region of the laser beam 250. By making the power generation cells 301-330 the same shape and dimensions in this way, a general-purpose power generation cell can be used, the design of the power generation panel 300-1 can be simplified, and the manufacturing cost can be increased. It can be suppressed.

[Embodiment 2]
FIG. 8 is a diagram showing a power generation module and a power generation cell of the power generation panel according to the second embodiment. FIG. 9 is a diagram showing an electrical connection state of the power generation module and the power generation cell in the power generation panel of FIG.

The power generation panel 300-2 according to the second embodiment is different from the power generation panel 300-1 according to the first embodiment in that the power generation cell 301 and the power generation cell 310 are excluded. That is, the power generation cells 302-305 form the power generation module G351, and the power generation cells 306-309 form the power generation module G361. Other configurations are the same as those of the power generation panel 300-1 according to the first embodiment.

The power generation modules G351 and G361 are formed except for the power generation cell 301 and the power generation cell 310 for the following reasons.

First, since the power generation amount of the power generation modules G350 and G360 shown in the first embodiment is larger than that of the other power generation modules G370-G420 (see FIG. 6), the power generation efficiency of the power generation modules G350 and G360 is higher than that of the other power generation modules. This is because it is considered that the amount of power generated by G370-G420 will decrease. As a second point, as shown in FIG. 5, the amount of power generated by the power generation cell 301 and the power generation cell 310, which are arranged at positions where the intensity of the laser beam 250 is low, is smaller than that of the other power generation cells. This is because even if these power generation cells 301 and 310 are excluded, the influence on the overall power generation efficiency of the power generation panel 300-2 is considered to be extremely small.

In consideration of the above two points, as shown in FIG. 8, the power generation modules G351, G361, and G370-G420 are formed. Further, as shown in FIG. 9, the power generation modules G351, G361, and G370-G420 are electrically connected in series, and the power generation cells 302-309 and 311-330 in the power generation modules G351, G361, and G370-G420 are electrically connected. Are connected to each other in parallel.

In the case of FIG. 8, the value of (maximum-minimum) / (maximum + minimum) of the power generation amount of the power generation module G351-G420 is 8.4-6.5 / 8.4 + 6.5 = 1.9 / 14. 9 = 0.128. Looking at this value, it can be seen that the variation in the amount of power generation between the power generation modules G351 to G420 is kept small. Therefore, it can be said that the power generation panels 300-2 are ideally grouped in the second embodiment as in the first embodiment.

The power generation efficiency of the power generation panel 300-2 of FIG. 8 obtained by the experiment was as follows. First, in 6%, all the power generation cells 302-309 and 311-330 were simply electrically connected in series without forming a power generation module as in the second embodiment. On the other hand, when the power generation cells 302-309 and 311-330 were connected in series and parallel as in the second embodiment, the ratio was 24%. It was demonstrated that by grouping the power generation cells 302-309 and 311-330 as in the second embodiment and devising the electrical connection, four times the power generation efficiency can be obtained as compared with the case where the power generation cells are not devised.

In the second embodiment, the light receiving areas of the power generation modules G351 and G361 are adjusted except for the power generation cells 301 and 310 so that the power generation amount of the power generation modules G351 to G420 connected in parallel is leveled. Therefore, in the second embodiment, the number of two power generation cells can be reduced as compared with the first embodiment. Therefore, the material cost of the power generation cell is reduced by 1/15 as compared with the first embodiment.

[Embodiment 3]
FIG. 10 is a diagram showing a power generation module and a power generation cell of the power generation panel according to the third embodiment. FIG. 11 is a diagram showing an electrical connection state of the power generation module and the power generation cell in the power generation panel of FIG.

Compared with the power generation panel 300-2 according to the second embodiment, the power generation panel 300-3 according to the third embodiment has one power generation cell with the power generation modules G352, G362, G372, G382, G392, G402, G412, and G422. The difference is that they are formed. For example, in the power generation module G352, the area of four power generation cells 302-305 of the power generation module G351 of the power generation panel 300-2 (see FIG. 8) according to the second embodiment is formed by one power generation cell. .. This also applies to the power generation modules G362, G372, G382, G392, G402, 4G12, and G422.

Further, in the power generation panel 300-3 according to the third embodiment, as compared with the power generation panel 300-2 according to the second embodiment, the power generation module G412 and the power generation cell 321 form the power generation module G415, and the power generation module G422 and the power generation cell It is also different in that the power generation module G425 is formed with the 330.

In the third embodiment, power generation modules having the same light receiving area are used as much as possible. For example, the power generation modules G352, G362, G412, and G422 have the same light receiving area. Further, the power generation modules G372 and G402 and the power generation modules G382 and G392 also have the same light receiving area. Further, the light receiving area of the power generation modules G382 and G392 is 1/2 of the light receiving area of the power generation modules G352, G362, G412, and G422. Further, the light receiving area of the power generation modules G372 and G402 is 3/4 of the light receiving area of the power generation modules G352, G362, G412, and G422. The light receiving area of the power generation cells 321 and 330 is 1/2 of the light receiving area of the power generation modules G382 and G392.

By using power generation modules having the same light receiving area as much as possible in this way, the types of power generation modules can be suppressed, and the manufacture of the power generation panel 300-3 can be simplified and the cost can be reduced.

As shown in FIG. 11, in the power generation panel 300-3, the power generation modules G352, G362, G372, G382, G392, G402, G415, and G425 are electrically connected in series. Further, the power generation cell 321 forming the power generation module G415 and the power generation module G412 are electrically connected in parallel, and the power generation cell 330 forming the power generation module G425 and the power generation module G422 are electrically connected in parallel.

The power generation efficiency of the power generation panel 300-3 of FIG. 10 obtained by the experiment was as good as 25%. This is because, in general, when the light receiving area of one sheet as a power generation module is large, the power generation efficiency is higher than when the light receiving area is small.

It is also conceivable that the light receiving area of the power generation modules G352, G362, G372, G382, G392, G402, G412, and G422 can be freely sized in consideration of only the power generation efficiency. However, if the size is free, when the power generation panel 300-3 is manufactured, the remaining part after cutting out each power generation module is not easy to use, and some parts are discarded. Therefore, the power generation panel 300-3 Manufacturing costs increase.

If the light receiving areas of the power generation modules G352, G362, G372, G382, G392, G402, G412, and G422 are manufactured at a constant division ratio as in the third embodiment, the discarded portion is reduced, so that power generation is performed. The manufacturing cost of the panel 300-3 can be suppressed.

[Embodiment 4]
FIG. 12 is a diagram showing a power generation module and a power generation cell of the power generation panel according to the fourth embodiment. FIG. 13 is a diagram showing an electrical connection state of the power generation module and the power generation cell in the power generation panel of FIG.

The power generation panel 300-4 according to the fourth embodiment has nine power generation modules of G354, G364, G374, G384, G394, G404, G414, G424, and G434, and six power generation cells arranged on the center side of the laser beam 250. It is formed from 313-318. Each of the six power generation cells 313-318 can be seen as a power generation module. Seen in this way, it can be said that each power generation module has one or a plurality of power generation cells, and the power generation module arranged on the central side of the laser beam 250 is composed of one power generation cell.

As shown in FIG. 12, the power generation module G354 is formed by the power generation cells 301-303. The amount of power generated by the power generation module G354 is 3.6 W. The power generation modules G364 are formed by the power generation cells 304 and 305. The amount of power generated by the power generation module G364 is 5.2 W. The power generation modules G374 are formed by the power generation cells 306 and 307. The amount of power generated by the power generation module G374 is 5.4 W. The power generation module G384 is formed by the power generation cells 308-310. The amount of power generated by the power generation module G384 is 3.4 W.

The power generation modules G394 are formed by the power generation cells 311 and 312. The amount of power generated by the power generation module G394 is 3.4 W. The power generation modules G404 are formed by the power generation cells 319 and 320. The amount of power generated by the power generation module G404 is 3.4 W. The amount of power generated by the power generation cell 313 is 3.3 W. The amount of power generated by the power generation cell 314 is 3.9 W. The amount of power generated by the power generation cell 315 is 4.2 W. The amount of power generated by the power generation cell 316 is 4.3 W. The amount of power generated by the power generation cell 317 is 3.9 W. The amount of power generated by the power generation cell 318 is 3.3 W.

The power generation module G414 is formed by the power generation cells 321-324. The amount of power generated by the power generation module G414 is 4.4 W. The power generation modules G424 are formed by the power generation cells 325 and 326. The amount of power generated by the power generation module G424 is 4.3 W. The power generation module G434 is formed by the power generation cells 327-330. The amount of power generated by the power generation module G434 is 4.7 W.

In the case of FIG. 12, the value of (maximum-minimum) / (maximum + minimum) of the power generation amount of the power generation module G354-G434 and the power generation cell 313-318 is 5.4-3.3 / 5.4 + 3.3 = 2.1 / 8.7 = 0.241.

The electrical connection state of the power generation module G354-G434 and the power generation cell in the power generation panel 300-4 of FIG. 12 is as shown in FIG.

In the power generation panel 300-4 shown in FIG. 13, the power generation cells 301-330 (excluding the power generation cells 313-318) of the power generation panel 300-4 are grouped into nine power generation modules G354-G434. The power generation module G354-G434 and the power generation cell 313-318 are electrically connected in series as shown in FIG. Further, the power generation cells in each power generation module forming the power generation modules G354-G434 are electrically connected to each other in parallel. For example, in the power generation module G354, the power generation cells 301-303 forming the power generation module G354 are electrically connected in parallel to each other as shown in FIG. Further, in the power generation module G434, the power generation panels 327-330 forming the G434 are electrically connected in parallel to each other as shown in FIG.

As described above, when the power generation cells in the power generation module are electrically connected in parallel to each other and the power generation modules are electrically connected in series, the power generation efficiency of the power generation panel 300-4 is improved. The power generation panel 300-4 according to the fourth embodiment has a larger number of circuits (power generation modules and power generation cells) connected in series than the power generation panels 300-1 to 300-3 according to the first to third embodiments. .. Therefore, the output voltage of the power generation panel 300-4 according to the fourth embodiment is higher than the output voltage of the power generation panels 300-1 to 300-3 according to the third embodiment. That is, the voltage of the power generation panel 300-4 according to the fourth embodiment is increased.

The power generation efficiency of the power generation panel 300-4 of FIG. 12 obtained by the experiment was 23%. In addition, the operating voltage at the maximum output point of the power generation panel 300-4 has been increased to 8.5V. Therefore, even though the (maximum-minimum) / (maximum + minimum) value of the power generation amount of the power generation module G354-G434 and the power generation cell 313-318 is as large as 0.241, the decrease in power generation efficiency is It is within about 1%.

When the load circuit is actually connected, the higher the output voltage, the higher the efficiency of the load circuit tends to be. Therefore, in the power generation panel 300-4 according to the fourth embodiment, it can be expected that the overall efficiency when the load circuit is connected more than compensates for this difference.

[Embodiment 5]
FIG. 14 is a diagram showing a power generation panel according to a fifth embodiment in which a plurality of laser beams are irradiated to generate power.

In the first embodiment, the case where one laser beam 250 is irradiated to the power generation panels 300-1 to 300-4 has been described. In the fifth embodiment, a plurality of laser beams are simultaneously superimposed to irradiate the power generation panel.

FIG. 14 shows a state in which four laser beams having a specific intensity distribution are simultaneously irradiated to the power generation panel 300-5 from the four light irradiation devices. In this case, the intensity distributions of the four laser beams may or may not be the same. If all four laser beams have the same normal distribution of intensity distribution, the power generation efficiency of the power generation panel 300-5 can be improved by changing the size of the power generation panel of Embodiments 1-4 to a similar shape. It can be improved, and not only when the area surrounded by the four optical axes is used as the area for irradiating by superimposing a part of the four laser beams as shown in the figure, but also for the four laser beams. Even if each intensity distribution is different, a power generation module is formed according to the intensity distribution of the irradiation region so that the power generation efficiency of the power generation panel 300-5 can be improved and the area of the region having a low power generation density can be reduced.

When a plurality of laser beams are simultaneously irradiated on the power generation panel 300-5, the power of the laser light on the light receiving surface of the power generation panel 300-5 is improved, so that the power generation density of the power generation panel 300-5 can be improved. This eliminates the need to increase the area of the power generation module in the region where the incident intensity of the power generation panel 300-5 is small, so that the power generation panel 300-5 can be miniaturized. Therefore, it can be easily mounted on the electric vehicle 110 whose mounting area is limited.

As described above, in the power generation panel according to the first to fourth embodiments, the power generation module having a small light receiving area is formed in the region where the incident intensity is large, and the power generation module having a large light receiving area is formed in the region where the incident intensity is small. Based on such a technical idea, it is possible to construct a power generation panel having high power generation efficiency for laser light having a specific intensity distribution regardless of whether the intensity distribution of the laser light is a normal distribution or not.

100 charging station,
110 electric car,
120 charging space,
200 light irradiation device,
250 laser beam,
300, 300-1, 300-2, 300-3, 300-4, 300-5 Power generation panel,
301-330 power generation cell,
G350, G351, G352, G354 power generation module,
G360, G361, G362, G364 power generation module,
G370, G372, G374 power generation module,
G380, G382, G384 power generation module,
G390, G392, G394 power generation module,
G400, G402, G404 power generation module,
G410, G412, G414, G415 power generation module,
G420, G422, G424, G425, G434 power generation module.

Claims (8)

A power generation panel that receives and generates laser light with an intensity distribution that has a normal distribution.
The power generation panel has a plurality of power generation modules having different light receiving areas.
All the power generation modules are electrically connected in series and
The light receiving area of the power generation module is larger in the power generation module arranged in a region where the intensity of the laser beam is relatively weak than in the region where the intensity of the laser light is relatively strong.
The plurality of power generation modules are arranged in a grid pattern in the irradiation region of the laser beam.
Power generation panel. Each power generation module has one or more power generation cells and
The power generation panel according to claim 1, wherein all the power generation cells are electrically connected in parallel for each power generation module. A power generation panel that receives and generates laser light with an intensity distribution that has a normal distribution.
The power generation panel has a plurality of power generation modules having different light receiving areas.
All the power generation modules are electrically connected in series and
The light receiving area of the power generation module is larger in the power generation module arranged in a region where the intensity of the laser beam is relatively weak than in the region where the intensity of the laser light is relatively strong.
Each said power generation module has one or more power generation cells.
All the power generation cells are electrically connected in parallel for each power generation module.
Power generation panel. A power generation panel that receives and generates laser light with an intensity distribution that has a normal distribution.
The power generation panel has a plurality of power generation modules having different light receiving areas.
All the power generation modules are electrically connected in series and
The light receiving area of the power generation module is larger in the power generation module arranged in a region where the intensity of the laser beam is relatively weak than in the region where the intensity of the laser light is relatively strong.
The laser beam is a power generation panel in which a plurality of laser beams are superimposed. The power generation according to any one of claims 1 to 4, wherein the light receiving area of the power generation module is larger than that of the power generation module arranged on the outer peripheral side of the laser beam irradiation region and larger than the power generation module arranged on the center side. panel. The power generation panel according to any one of claims 1 to 5, wherein the power generation modules having the same area are arranged line-symmetrically with respect to a straight line passing through the center of the laser beam. The power generation panel according to any one of claims 1 to 6, wherein the power generation module arranged on the center side of the laser beam is composed of one power generation cell. The power generation panel according to any one of claims 2, 3, and 7, wherein the power generation cells have the same shape and dimensions and are arranged in a grid pattern in the irradiation region of the laser beam.

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