JP5338295B2 - Vehicle superstructure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle upper structure for improving power generation efficiency without complicating a structure. <P>SOLUTION: The vehicle upper structure 10 includes a solar battery cell 12 arranged on an upper part 6 of a windshield 2 of a vehicle. The solar battery cell 12 receives light from both the inside/outside of a vehicle cabin, and converts the light into electric energy. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a vehicle upper structure including a solar battery cell installed in a vehicle window.

  Conventionally, a first solar cell that is installed on a sunroof of a vehicle and receives light from the outside of the passenger compartment and converts it into electric energy; 2. Description of the Related Art A vehicle upper structure including a second solar battery cell that is converted into (see, for example, Patent Document 1) is known. The first and second solar cells are provided with a plurality of through-holes coaxially, and the light that has passed through the plurality of through-holes is reflected by the reflecting material to irradiate the second solar cell.

In addition, a technique is known in which a masking layer is formed on a part of the vehicle sunroof other than the light receiving surface of the solar battery cell to hide the wiring connection of the solar battery cell (see, for example, Patent Document 2).
JP 2005-67472 A Japanese Utility Model Publication No. 6-39935

  However, in the vehicle upper structure described in Patent Document 1, the amount of light received by the first and second solar cells from both the vehicle outer side and the vehicle inner side is determined by the first solar cell without through holes from the vehicle outer side. It is approximately equal to the amount of light received. Therefore, it is difficult for the vehicle upper structure described in Patent Document 1 to improve the power generation efficiency. In addition, the vehicle upper structure described in Patent Document 1 requires a plurality of through holes and reflectors that penetrate the first and second solar cells, and thus the configuration is complicated.

  Moreover, even if the technique described in Patent Document 2 is applied to the vehicle upper structure described in Patent Document 1, it is difficult to improve the power generation efficiency.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle upper structure capable of improving power generation efficiency without complicating the configuration.

According to one aspect of the invention,
A solar cell that is installed in the upper part of the front window of the vehicle and / or the upper part of the rear window of the vehicle and receives light from both sides of the vehicle interior and vehicle interior and converts it into electrical energy ;
There is provided a vehicle upper structure including a heat transfer plate that connects the solar battery cell and a metal ceiling plate of the vehicle.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle upper structure which can improve electric power generation efficiency can be provided, without complicating a structure.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In each figure, the arrow direction UP indicates the vehicle upward direction, and the arrow direction FR indicates the vehicle forward direction.

  FIG. 1 is a perspective view showing a configuration of a vehicle upper structure according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. The vehicle upper structure 10 includes a front window 2. The front window 2 takes in direct light from the sun into the vehicle interior from the front of the vehicle, and includes an inclined portion 4 inclined obliquely with respect to the vehicle vertical direction and an upper portion extending in the vehicle rearward direction from the upper end of the inclined portion 4 (Horizontal portion) 6.

  The vehicle upper structure 10 includes a plurality of solar cells 12 installed on the front window upper portion 6, an output terminal 14 for extracting electricity from the plurality of solar cells 12, a sealing layer 16, a protective layer 18, and a side seal. Layer 20.

  The solar battery cell 12 is installed on the vehicle interior side with respect to the front window upper part 6 so as to face the front window upper part 6. In this case, the front window upper part 6 functions as a protective layer that protects the solar battery cells 12 from rainwater, dust, and the like.

  The solar battery cell 12 receives light from both sides of the vehicle interior side and vehicle interior side and converts it into electrical energy. The solar battery cell 12 may have a well-known configuration, and includes, for example, a double-sided light-receiving type single crystal silicon solar battery cell. The double-sided light-receiving single crystal silicon solar cell has pn junctions on both sides of the chip, and receives light on both sides of the chip and converts it into electrical energy.

  The solar battery cell 12 of Example 1 is a double-sided light-receiving single crystal silicon solar battery cell, but may have a structure in which two single-sided light-receiving single crystal silicon solar battery cells are bonded together. Further, it may be a polycrystalline type or an amorphous type. The single crystal type is excellent in photoelectric conversion efficiency (power generation rate), while the amorphous type has a small decrease in efficiency due to temperature rise. Moreover, the photovoltaic cell using organic compounds, such as inorganic compounds, such as GaAs, and an organic pigment | dye, may be sufficient, and there is no restriction | limiting in the kind of photovoltaic cell 12. FIG.

  The sealing layer 16 is a layer that seals the solar battery cell 12 and protects the solar battery cell 12 from deterioration due to moisture or oxygen. A light-transmitting material is used for the sealing layer 16, and for example, ethylene vinyl acetate copolymer (EVA), polyvinyl butyral (PVB), and polyethylene (PE) are used.

  The protective layer 18 is a layer that is installed on the vehicle interior side of the sealing layer 16 and protects the solar battery cell 12 from an external force. For the protective layer 18, a translucent material is used, for example, a polycarbonate substrate. The polycarbonate substrate is subjected to a hard coating process (for example, pencil hardness of 3H) by a sol-gel method on the outside of the passenger compartment, and a surface functionalization process is performed on the sealing layer 16 side by a corona discharge process. The adhesion with the sealing layer 16 can be enhanced by the surface functionalization treatment.

  The side seal layer 20 is interposed between the front window upper portion 6 and the protective layer 18 and surrounds the outer periphery of the sealing layer 16. As with the sealing layer 16, the side seal layer 20 protects the solar battery cell 12 from deterioration due to moisture and oxygen. For the side seal layer 20, for example, polyether ketone (PEK) is used.

  Next, an example of a method for manufacturing the vehicle upper structure 10 will be described. First, an ethylene vinyl acetate copolymer film (for example, a thickness of 400 μm), a string in which a plurality of solar cells 12 and an output terminal 14 are electrically connected in order to the vehicle interior side of the front window upper portion 6, ethylene vinyl acetate A copolymer film (for example, a thickness of 400 μm) and a polycarbonate substrate are disposed. Next, the sealing layer 16, the plurality of solar cells 12, the sealing layer 16, and the protective layer 18 are sequentially formed on the vehicle interior side of the upper portion 6 of the front window by a vacuum laminating process (for example, temperature 140 ° C., pressure 10 kPa). One-piece molding. Finally, between the front window upper portion 6 and the protective layer 18, polyether ketone is filled and thermoset to form the side seal layer 20.

  Next, the operation and function of the vehicle upper structure 10 will be described with reference to FIG. As described above, the vehicle upper structure 10 includes the solar battery cells 12 installed on the front window upper portion 6. The solar battery cell 12 receives light from both sides of the vehicle interior side and vehicle interior side and converts it into electrical energy. Direct sunlight from the sun is incident on the outside of the passenger compartment of the solar battery cell 12. On the other hand, on the vehicle interior side of the solar battery cell 12, reflected light that enters the vehicle interior from the front window inclined portion 4 and is reflected by the instrument panel upper portion 8 or the like is incident.

  If the solar battery cell 12 is installed on the sunroof, the amount of incident light on the vehicle interior side of the solar battery cell 12 is not sufficient, and the power generation efficiency decreases. Moreover, if the reflective material which reflects the several through-hole which penetrates the photovoltaic cell 12 and the light which passed the several through-hole to the vehicle interior side of the photovoltaic cell 12 similarly to a prior art example is provided, The configuration becomes complicated.

  On the other hand, since the solar cell 12 is installed in the front window upper part 6 in the vehicle upper structure 10 of the first embodiment, the reflection is incident on the vehicle interior from the front window inclined part 4 and reflected by the instrument panel upper part 8 or the like. Light enters the vehicle interior side of the solar battery cell 12. Therefore, power generation efficiency can be increased without complicating the configuration.

  Further, in the vehicle upper structure 10 of the first embodiment, the solar cells 12 are installed on the front window upper portion 6, so that the heat generated in the solar cells 12 diffuses to the front window 2. That is, the front window 2 functions as a large area heat sink. Thereby, the temperature rise of the photovoltaic cell 12 can be suppressed, and the fall of the photoelectric conversion efficiency (power generation rate) accompanying a temperature rise can be suppressed. As a result, as the solar battery cell 12, a single crystal silicon solar battery cell having high photoelectric conversion efficiency (power generation rate) but weak against heat and easily causing efficiency decrease due to temperature rise can be used, and power generation efficiency can be increased. .

  FIG. 3 is a cross-sectional view showing the configuration of the vehicle upper structure according to the second embodiment of the present invention, and is a cross-sectional view corresponding to FIG. Hereinafter, the configuration of the vehicle upper structure 10A will be described, but the same configuration as the vehicle upper structure 10 of FIG.

  The vehicle upper structure 10A includes a front window 2A. Unlike the front window 2 of FIG. 2, the front window 2A is a laminated glass in which two glass plates 2A-1 and 2A-2 are bonded together. A spacer (not shown) is interposed between the two glass plates 2A-1 and 2A-2 to hermetically seal the hollow portion. Like the front window 2 of FIG. 2, the front window 2A includes an inclined portion 4A that is inclined obliquely with respect to the vehicle vertical direction, and an upper portion 6A that extends in the vehicle rearward direction from the upper end of the inclined portion 4A.

  Similar to the vehicle upper structure 10 of FIG. 2, the vehicle upper structure 10 </ b> A includes solar cells 12, an output terminal 14, and a sealing layer 16. The solar battery cell 12 is installed in the front window upper part 6A, receives light from both sides of the vehicle interior outside and vehicle interior and converts it into electrical energy.

  The solar battery cell 12 is installed in the hollow part of the front window upper part 6A so as to face the front window upper part 6A. Since the hollow portion is hermetically sealed, the side seal layer 20 of FIG. 2 is not necessary. Further, since the hollow portion is hermetically sealed, the solar battery cell 12 can be reliably protected from moisture and oxygen.

  In addition, as a mode of joining the two glass plates 2A-1 and 2A-2, the hollow portion is filled with the same resin material as the sealing layer 16 that seals the solar battery cells 12 in addition to this. Also good.

  The glass plate 2 </ b> A- 1 outside the passenger compartment with respect to the solar battery cell 12 functions as a protective layer that protects the solar battery cell 12 from rainwater, dust, and the like. On the other hand, the glass plate 2 </ b> A- 2 on the vehicle interior side with respect to the solar battery cell 12 functions as the protective layer 18 in FIG. 2 that protects the solar battery cell 12 from external force. Therefore, the protective layer 18 in FIG. 2 is not necessary.

  As described above, the solar battery cell 12 can be reliably protected from moisture and oxygen by using the glass plate 2A-2 having a relatively low moisture and oxygen permeability instead of the protective layer 18 of FIG.

  Further, by using the glass plate 2A-2 having a high thermal conductivity and a large area instead of the protective layer 18 of FIG. 2, the heat generated in the solar battery cell 12 can be diffused to the glass plate 2A-2. Thereby, compared with Example 1, the temperature rise of the photovoltaic cell 12 can be suppressed further, and the fall of the photoelectric conversion efficiency (power generation rate) by a temperature rise can be suppressed. As a result, a single crystal silicon solar cell having high photoelectric conversion efficiency (power generation rate) can be used as the solar cell 12.

  Unlike the vehicle upper structure 10 of FIG. 2, the vehicle upper structure 10 </ b> A includes a masking layer 30. The masking layer 30 masks portions corresponding to the plurality of solar cells 12 with a color that is difficult to distinguish from the solar cells 12. Note that the masking layer 30 includes openings 32 through which incident light to the solar cells 12 passes at portions corresponding to the plurality of solar cells 12. Here, the part corresponding to the solar battery cell 12 means a part obtained by projecting the solar battery cell 12 onto the masking object 2A-2 along the direction orthogonal to the masking object 2A-2. The masking layer 30 is formed by ceramic printing, for example.

  The color tone of the masking layer 30 is preferably close to the color tone of the solar battery cell 12. Specifically, in the L * a * b * color system, when the color of the solar battery cell 12 is (L1, a1, b1) and the color of the masking layer 30 is (L2, a2, b2), | a1 -A2 | and | b1-b2 | are each 150 or less, preferably 100 or less, more preferably 70 or less.

  By masking between the portions corresponding to the plurality of solar cells 12 by the masking layer 30, it is possible to make it difficult to visually recognize the wiring connecting the plurality of solar cells 12, and to improve the design. Can do.

  Further, in order to make it difficult to visually recognize the wiring and the like, it is better to apply black coating to the interconnector connecting the solar battery cells 12.

  Thus, since the solar cell 12 is installed in the hollow part of the front window 2A in the vehicle upper structure 10A of the second embodiment, the solar cell 12 can be reliably protected from moisture and oxygen. Moreover, the temperature rise of the photovoltaic cell 12 can be suppressed, and the fall of the photoelectric conversion efficiency (power generation rate) accompanying a temperature rise can be suppressed. As a result, a single crystal silicon solar battery cell having high photoelectric conversion efficiency (power generation rate) can be used as the solar battery cell 12, and the power generation efficiency can be increased.

  Further, the vehicle upper structure 10A of the second embodiment includes the masking layer 30 that masks the portions corresponding to the plurality of solar cells 12 with colors that are difficult to distinguish from the solar cells 12, and therefore the wiring of the solar cells 12 Connections can be hidden and design can be improved.

  FIG. 4 is a cross-sectional view showing the configuration of the vehicle upper structure according to the third embodiment of the present invention, and is a cross-sectional view corresponding to FIG. Hereinafter, although the configuration of the vehicle upper structure 10B will be described, the same components as those of the vehicle upper structure 10 in FIG.

  Similar to the vehicle upper structure 10 of FIG. 2, the vehicle upper structure 10 </ b> B includes a solar battery cell 12, an output terminal 14, a sealing layer 16, a protective layer 18, and a side seal layer 20. The solar battery cell 12 is installed in the front window upper part 6, receives light from both sides of the vehicle interior side and the vehicle interior side and converts it into electric energy.

  Further, the vehicle upper structure 10B includes a heat transfer plate 50 that connects the solar battery cell 12 and the metal ceiling plate 40 of the vehicle, unlike the vehicle upper structure 10 of FIG. The heat transfer plate 50 includes an opening 52 that allows incident light to the solar battery cell 12 to pass through the part corresponding to the plurality of solar battery cells 12 except for the outer peripheral edge. Here, the part corresponding to the solar battery cell 12 means a part obtained by projecting the solar battery cell 12 onto the heat transfer plate 50 along a direction orthogonal to the heat transfer plate 50. For example, the heat transfer plate 50 connects the vehicle interior side of the solar battery cell 12 and the ceiling plate 40.

  The heat transfer plate 50 is a plate member having a high thermal conductivity (for example, a thickness of 0.1 mm). For example, a metal plate such as a copper plate or a ceramic plate such as aluminum nitride is used. The heat transfer plate 50 and the ceiling plate 40 are joined by welding, brazing, or the like.

  Since the heat generated in the solar cells 12 through the heat transfer plate 50 diffuses to the ceiling plate 40, the temperature rise of the solar cells 12 can be suppressed, and the photoelectric conversion efficiency (power generation rate) associated with the temperature rise can be suppressed. The decrease can be further suppressed as compared with Example 1. As a result, a single crystal silicon solar cell having high photoelectric conversion efficiency (power generation rate) can be used as the solar cell 12.

  A masking layer 30 </ b> B having a color that is difficult to distinguish from the solar battery cells 12 is formed on both surfaces of the heat transfer plate 50 that can be visually recognized. The masking layer 30B is formed, for example, by applying an opaque paint (for example, black) and naturally drying. In this case, heat treatment is not necessary as compared with the case of forming by ceramic printing, so that the cost can be reduced and the yield can be improved.

  Thus, since vehicle superstructure 10B of Example 3 is equipped with the heat exchanger plate 50 which connects the photovoltaic cell 12 and the metal ceiling boards 40 of a vehicle, it suppresses the temperature rise of the photovoltaic cell 12. FIG. It is possible to suppress a decrease in photoelectric conversion efficiency (power generation rate) accompanying a temperature rise. As a result, a single crystal silicon solar battery cell having high photoelectric conversion efficiency (power generation rate) can be used as the solar battery cell 12, and the power generation efficiency can be increased.

  Moreover, since the vehicle upper structure 10B of Example 3 is provided with the masking layer 30B on both surfaces of the heat exchanger plate 50, the wiring connection of the photovoltaic cell 12 can be hidden and design property can be improved.

  FIG. 5 is a cross-sectional view showing the configuration of the vehicle upper structure according to the fourth embodiment of the present invention, and is a cross-sectional view corresponding to FIG. Hereinafter, the configuration of the vehicle upper structure 10C will be described, but the same configuration as the vehicle upper structure 10 in FIG.

  Similar to the vehicle upper structure 10 of FIG. 2, the vehicle upper structure 10 </ b> C includes a solar battery cell 12, an output terminal 14, a sealing layer 16, a protective layer 18, and a side seal layer 20. The solar battery cell 12 is installed in the front window upper part 6, receives light from both sides of the vehicle interior side and the vehicle interior side and converts it into electric energy.

  Further, the vehicle upper structure 10C differs from the vehicle upper structure 10 of FIG. 2 in that the portion 64 corresponding to the solar battery cell 12 and the peripheral portion 62 of the portion 64 are rough on the outer surface (outer surface of the passenger compartment) of the front window 2. It is. Here, the portion 64 corresponding to the solar battery cell 12 is a part in which the solar battery cell 12 is projected onto the front window 2 along a direction orthogonal to the front window 2.

  Sandblasting is preferably used for roughening the front window 2 from the viewpoint of quality stability.

  FIG. 6 is a partially enlarged view of FIG. Since the peripheral portion 62 of the outer surface of the front window 2 is a rough surface, forward scattering occurs as shown in FIG. Therefore, power generation efficiency can be increased.

  Further, since the portion 64 corresponding to the solar battery cell 12 on the outer surface of the front window 2 is a rough surface, the dielectric reflection can be suppressed by the antiglare effect, and the incident light outside the passenger compartment of the solar battery cell 12 can be suppressed. The amount of light can be increased. Therefore, power generation efficiency can be increased.

  Thus, in the vehicle upper structure 10C of the fourth embodiment, the portion 64 corresponding to the solar cell 12 and the peripheral portion 62 of the portion 64 of the outer surface of the front window 2 are rough surfaces. The amount of incident light outside the passenger compartment can be increased, and the power generation efficiency can be increased.

  FIG. 7 is a perspective view showing the configuration of the vehicle upper structure according to the fifth embodiment of the present invention, and is a cross-sectional view corresponding to FIG. Hereinafter, although the structure of vehicle upper structure 10D is demonstrated, about the structure same as the vehicle upper structure 10 of FIG. 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The vehicle upper structure 10 </ b> D includes a rear window 72. The rear window 72 takes in direct light from the sun into the vehicle interior from the rear of the vehicle, and extends in the vehicle forward direction FR from the inclined portion 74 inclined obliquely with respect to the vehicle vertical direction and the upper end of the inclined portion 74. And an upper part (horizontal part) 76.

  Similar to the vehicle upper structure 10 of FIG. 2, the vehicle upper structure 10 </ b> D includes a solar battery cell 12, an output terminal 14, a sealing layer 16, a protective layer 18, and a side seal layer 20. The solar battery cell 12 is installed on the rear window upper part 76, receives light from both sides of the vehicle interior outside and vehicle interior and converts it into electrical energy.

  The solar battery cell 12 is installed on the vehicle interior side with respect to the rear window upper portion 76 so as to face the rear window upper portion 76. In this case, the rear window upper portion 76 functions as a protective layer that protects the solar battery cell 12 from rainwater, dust, and the like.

  Next, the operation and function of the vehicle upper structure 10D will be described with reference to FIG. The vehicle upper structure 10 </ b> D includes the solar battery cells 12 installed on the rear window upper portion 76 as described above. The solar battery cell 12 receives light from both sides of the vehicle interior side and vehicle interior side and converts it into electrical energy. Direct sunlight from the sun is incident on the outside of the passenger compartment of the solar battery cell 12. On the other hand, on the vehicle interior side of the solar battery cell 12, the reflected light that enters the vehicle interior from the rear window inclined portion 74 and is reflected by the partition 78 between the rear seat and the trunk is incident.

  If the solar battery cell 12 is installed on the sunroof, the amount of incident light on the vehicle interior side of the solar battery cell 12 is not sufficient, and the power generation efficiency decreases. Moreover, if the reflective material which reflects the several through-hole which penetrates the photovoltaic cell 12 and the light which passed the several through-hole to the vehicle interior side of the photovoltaic cell 12 similarly to a prior art example is provided, The configuration becomes complicated.

  On the other hand, in the vehicle upper structure 10D of the fifth embodiment, since the solar cells 12 are installed in the rear window upper portion 76, the reflected light that is incident on the vehicle interior from the rear window inclined portion 74 and reflected by the partition 78 or the like is solar. The light enters the vehicle compartment side of the battery cell 12. Therefore, power generation efficiency can be increased without complicating the configuration.

  Further, in the vehicle upper structure 10 </ b> D of the fifth embodiment, since the solar battery cell 12 is installed on the rear window upper part 76, the heat generated in the solar battery cell 12 diffuses to the rear window 72. That is, the rear window 72 functions as a large area heat sink. Thereby, the temperature rise of the photovoltaic cell 12 can be suppressed, and the fall of the photoelectric conversion efficiency (power generation rate) accompanying a temperature rise can be suppressed. As a result, a single crystal silicon solar battery cell having high photoelectric conversion efficiency (power generation rate) can be used as the solar battery cell 12, and the power generation efficiency can be increased.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in Example 1-5 mentioned above, although the photovoltaic cell 12 was installed in the vehicle interior side or the hollow part with respect to the front window 2 (rear window 72), it may be installed in the vehicle interior outside. Good. In any case, the reflected light reflected from the instrument panel upper part 8 (partition plate 78) and the like from the front window inclined part 4 (rear window inclined part 74) into the vehicle interior is reflected in the vehicle of the solar battery cell 12. Since it is incident on the indoor side, power generation efficiency can be increased without complicating the configuration.

  Moreover, in Example 1 and 3-5 mentioned above, you may give the function as the masking layer 30 to the side seal layer 20 by mixing a pigment with the side seal layer 20.

  Moreover, in Example 2 mentioned above, although the laminated glass 2A assumed that 2 glass plates were bonded together, there is no restriction | limiting in particular in the number of the glass plates which comprise a laminated glass, For example, even if it is 3 sheets Good.

  Moreover, in Example 2 mentioned above, although the masking layer 30 was formed in the vehicle interior side surface (lower surface) of the glass plate 2A-2 on the vehicle interior side, it may be formed on the vehicle exterior side surface (upper surface). You may form in the lower surface or upper surface of glass plate 2A-1 of a vehicle interior outer side.

  In the above-described third embodiment, the heat transfer plate 50 and the ceiling plate 40 are joined by welding, brazing, or the like, but may be in close contact with a jig or the like.

  Moreover, in Example 5 mentioned above, the rear window 72 may be made into a laminated glass similarly to Example 2, and the photovoltaic cell 12 may be installed in the hollow part of this laminated glass. Thereby, the photovoltaic cell 12 can be reliably protected from moisture and oxygen. Moreover, by this, the temperature rise of the photovoltaic cell 12 can be suppressed, and the fall of the photoelectric conversion efficiency (power generation rate) accompanying a temperature rise can be suppressed.

  Moreover, in Example 5 mentioned above, you may install the heat exchanger plate 50 which connects the photovoltaic cell 12 and the metal ceiling boards 40 of a vehicle similarly to Example 3. FIG. Thereby, the temperature rise of the photovoltaic cell 12 can be suppressed, and the fall of the photoelectric conversion efficiency (power generation rate) accompanying a temperature rise can be suppressed.

  Moreover, in Example 5 mentioned above, similarly to Example 4, the part corresponding to the photovoltaic cell 12 and the peripheral part of this part may be a rough surface among the outer surfaces of the rear window 72. Here, the part corresponding to the solar battery cell 12 is a part in which the solar battery cell 12 is projected onto the rear window 72 along a direction orthogonal to the rear window 72. Thereby, the light quantity of the incident light outside the passenger compartment of the solar battery cell 12 can be increased, and the power generation efficiency can be increased.

1 is a perspective view showing a configuration of a vehicle upper structure according to a first embodiment of the present invention. It is sectional drawing along the AA line of FIG. It is sectional drawing which shows the structure of the vehicle superstructure of Example 2 of this invention. It is sectional drawing which shows the structure of the vehicle superstructure of Example 3 of this invention. It is sectional drawing which shows the structure of the vehicle superstructure of Example 4 of this invention. FIG. 6 is a partially enlarged view of FIG. 5. It is sectional drawing which shows the structure of the vehicle upper structure of Example 5 of this invention.

Explanation of symbols

2 Front window 4 Front window inclined part 6 Front window upper part 8 Instrument panel upper part 10 Vehicle upper structure 12 Solar cell 40 Ceiling panel 50 Heat transfer plate 72 Rear window 74 Rear window inclined part 76 Rear window upper part 78 Partition

Claims (3)

A solar cell that is installed in the upper part of the front window of the vehicle and / or the upper part of the rear window of the vehicle and receives light from both sides of the vehicle interior and vehicle interior and converts it into electrical energy ;
A vehicle upper structure comprising a heat transfer plate connecting the solar battery cell and a metal ceiling plate of the vehicle. The front window of the outer surface and the vehicle superstructure according to claim 1, wherein the peripheral portion of the part and partial corresponding to the solar cell of the rear window of the outer surface is rough. Masking layer is provided around the solar cell,
The color tone of the masking layer, in L * a * b * color system, the color of the solar cell and (L1, a1, b1), when the color of the masking layer and (L2, a2, b2), The vehicle superstructure according to claim 1 or 2, wherein | a1-a2 | and | b1-b2 |

Images