JP2018038153A - Solar cell module mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module mounting structure which reduces rigidity deterioration of the solar cell module having a surface layer made of resin while inhibiting increase of a vehicle body weight.SOLUTION: A peripheral edge part 50B of a net member 50 fixed to a lower surface 48 of a back surface layer 36 of a solar cell module 11 is fixed to roof side rails 14A, 14B forming a roof of a vehicle, and thus the solar cell module 11 is fixed to the roof of the vehicle even through the net member 50. Therefore, even if a resin having low rigidity compared to inorganic glass is adopted in a surface layer 30, rigidity deterioration of the solar cell module 11 is reduced as the solar cell module 11 is supported by the metallic net member 50. Meanwhile, since only the net member 50 is used to reduce the rigidity deterioration of the solar cell module 11, increase of a vehicle body weight is inhibited.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mounting structure for a solar cell module.

  Conventionally, a solar cell module has been proposed in which a sealing layer sealing solar cells is sandwiched between a surface layer located on the light-receiving surface side and a back layer located on the back side.

  It is intended to mount this solar cell module as a vehicle roof. In this case, both ends of the solar cell module in the vehicle width direction are supported by the roof side rail, and ends in the vehicle front-rear direction are supported by the front header and the rear header.

  Further, when the solar cell module is mounted as a vehicle roof, a resin may be used for the surface layer instead of inorganic glass from the viewpoint of weight reduction. When resin is employed for the surface layer, the rigidity of the solar cell module is reduced as compared with the case where inorganic glass is employed for the surface layer.

  Therefore, in order to compensate for the decrease in rigidity of the solar cell module that uses resin for the surface layer, a plurality of metal reinforcements that extend in the vehicle width direction between the roof side rails and support the solar cell module from below are provided. A structure in which a solar cell module is attached to the roof of a vehicle via reinforcement has been proposed (see, for example, Patent Document 1).

JP2015-104939A

  However, in the above prior art, the weight of the vehicle body increases correspondingly because the metal reinforcement is interposed to attach the solar cell module to the roof of the vehicle body. In this respect, the prior art has room for improvement.

  In view of the above facts, the present invention has an object to provide a solar cell module mounting structure that compensates for a decrease in rigidity of a solar cell module whose surface layer is made of resin while suppressing an increase in vehicle body weight.

  The invention according to claim 1 includes a sealing layer in which the power generation element is sealed, and a surface layer made of resin bonded to the light receiving surface side of the power generation element in the sealing layer, A solar cell module having a first peripheral edge portion fixed to a vehicle skeleton member to be configured, a center portion being fixed to a surface opposite to the light receiving surface side of the solar cell module, and a second peripheral edge to the vehicle skeleton member A planar member having a fixed portion.

  According to this configuration, the first peripheral edge portion of the solar cell module is fixed to the vehicle frame member constituting the roof of the vehicle body, and the center portion is fixed to the surface opposite to the light receiving surface side of the power generation element in the solar cell module. The 2nd peripheral part of the made planar member is being fixed to the vehicle frame member. That is, the solar cell module is directly fixed to the vehicle skeleton member and is fixed to the vehicle skeleton member via the planar member. Therefore, even when a resin having low rigidity compared to inorganic glass is adopted for the surface layer, the solar cell module is fixed to the vehicle skeleton member via the planar member, that is, the solar cell module is planar. Since it is supported by the member, it is possible to compensate for a decrease in rigidity of the solar cell module.

  On the other hand, in this solar cell module mounting structure, since a planar member is only added to compensate for the decrease in rigidity of the solar cell module, an increase in vehicle body weight is suppressed.

  Since the solar cell module mounting structure according to the first aspect of the present invention has the above-described configuration, it is possible to compensate for a decrease in rigidity of the solar cell module in which the surface layer is formed of a resin while suppressing an increase in the weight of the vehicle body.

It is a disassembled perspective view explaining the vehicle body attachment state of the mounting structure of the solar cell module which concerns on one Embodiment of this invention. It is sectional drawing which shows the mounting structure of the solar cell module in the AA line position in FIG.

  A solar cell module mounting structure according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. In addition, the mounting structure of the solar cell module according to the present embodiment is attached to the vehicle skeleton member as a roof of the vehicle body. Moreover, each figure is typical and the thing with low relevance to this invention is abbreviate | omitting illustration. Further, in FIG. 1, illustration of a net member 50 described later is omitted. In FIG. 1, the arrow FR indicates the front of the vehicle, the arrow W indicates the vehicle width direction, and the arrow UP indicates the upper side of the vehicle.

(Constitution)
As shown in FIG. 1, a solar cell module mounting structure 10 for an automobile according to this embodiment is such that a solar cell module 11 is attached to a vehicle body 12 as a roof. The vehicle body 12 includes a pair of roof side rails 14 </ b> A and 14 </ b> B that are provided at both ends in the vehicle width direction and extend in the vehicle front-rear direction as members that support the solar cell module mounting structure 10. The roof side rails 14A and 14B are formed integrally with the front pillars 16A and 16B and the like.

  Further, between the roof side rails 14A and 14B, a front header 18 and a rear header 22 extending in the vehicle width direction are disposed on the vehicle front side and the vehicle rear side, respectively.

  In the solar cell module mounting structure 10 according to the present embodiment, the solar cell module 11 is disposed in an opening 24 formed by roof side rails 14A and 14B, which are vehicle frame members, a front header 18, and a rear header 22. It is a structure that can be attached. Specifically, the peripheral edge portion of the solar cell module 11 is joined (fixed) to the roof side rails 14 </ b> A and 14 </ b> B, the front header 18, and the rear header 22.

  As shown in FIG. 2, the solar cell module 11 includes a light-transmitting surface layer 30 and a sealing layer 34 disposed on the back side of the surface layer 30 and encapsulating a power generation element (solar cell) 32. And a back layer 36 that supports the sealing layer 34 from the back side.

  The surface layer 30 is formed from a rectangular resin plate. The resin plate is made of, for example, polycarbonate (PC) that is transparent and excellent in weather resistance. A resin plate (PC plate) made of polycarbonate is suitable as the surface layer 30 of the mounting structure 10 of the solar cell module mounted on the vehicle because it has excellent weather resistance and is lightweight. In addition, “resin” in the present embodiment has light transparency.

  As shown in FIG. 2, the surface layer 30 includes a central portion 30 </ b> A that covers the sealing layer 34 and the back layer 36 as viewed from the vehicle vertical direction (stacking direction with the sealing layer 34), and the surface layer 30. And a peripheral edge portion 30B located along the outer periphery of the surface layer 30. Here, “(vehicle) outside” means an end side (separated from the sealing layer 34) of an object (for example, the surface layer 30) in the vehicle width direction or the vehicle front-rear direction (the extending direction of the surface layer 30). "(Vehicle) inside" means the center side of the object (sealing layer 34 side) in the vehicle width direction or the vehicle front-rear direction. The peripheral edge 30B corresponds to the first peripheral edge of the present invention.

  The sealing layer 34 includes a plurality of power generation elements 32 and a sealing material 38 that seals the power generation elements 32. The plurality of power generation elements 32 are regularly arranged in the sealing layer 34 and sealed with a sealing material 38. The power generation element 32 is a known power generation element such as a silicon-based cell. The sealing material 38 is formed of an ethylene-vinyl acetate copolymer (EVA) that is transparent and has elasticity and adhesiveness.

  Further, as shown in FIG. 2, in the extending direction of the surface layer 30 (for example, the vehicle width direction), the end portion of the sealing layer 34 is inside the vehicle (the power generation element 32 side) from the end portion of the surface layer 30. Is located.

  The back layer 36 is constituted by a back plate. The back plate is formed of the same PC as the surface layer 30 in order to prevent buckling of the solar cell module mounting structure 10 due to the adoption of PC for the surface layer 30. As shown in FIG. 2, the back layer 36 has a substantially constant plate thickness, but a convex portion 40 is formed along the outer periphery so as to protrude above the vehicle (on the surface layer 30 side) at the outer end of the vehicle. Has been.

  As shown in FIG. 2, the back layer 36 covers the sealing layer 34 when viewed from the stacking direction. Therefore, in the extending direction of the surface layer 30, the end portion of the back layer 36 is located on the vehicle outer side than the end portion of the sealing layer 34. As a result, the convex portion 40 formed on the vehicle outer side end portion of the back layer 36 protrudes upward of the vehicle on the vehicle outer side of the sealing layer 34 and comes into contact with the lower surface 31 of the surface layer 30. The inner surface 36 </ b> B is in contact with the vehicle outer end portion of the sealing layer 34.

  Therefore, the upper surface 36 </ b> A and the inner surface 36 </ b> B of the back layer 36 are bonded to the sealing layer 34 and the upper end of the convex portion 40 is bonded to the lower surface 31 of the surface layer 30 by laminating.

  Further, as shown in FIG. 2, in the extending direction of the surface layer 30 (for example, the vehicle width direction), the end portion (convex portion 40) of the back surface layer 36 is located on the vehicle inner side (power generation) than the end portion of the surface layer 30. It is located on the element 32 side). Therefore, as shown in FIG. 2, the lower surface 31 located at the peripheral edge 30 </ b> B of the surface layer 30 is not joined to the sealing layer 34 or the back layer 36 and is exposed below the vehicle.

  As shown in FIG. 2, the vehicle width direction end portion of the solar cell module 11 is fitted in the recess 44 </ b> A of the molding 44. Therefore, the solar cell module 11 is supported by the roof side rails 14A and 14B by arranging the molding 44 on the flange portion 42 (only one is shown) of the roof side rails 14A and 14B. Further, the lower surface 31 and the flange portion 42 in the peripheral edge portion 30 </ b> B of the surface layer 30 of the solar cell module 11 are fixed by a urethane-based adhesive 46.

  Furthermore, the net member 50 is joined to the lower surface 48 of the back surface layer 36 of the solar cell module 11 (the surface opposite to the light receiving surface side of the power generating element 32). The net member 50 is made of metal, and is formed in a rectangular shape wider than the back layer 36 when viewed in the vehicle vertical direction. Further, the central portion 50 </ b> A of the net member 50 is fixed over the entire lower surface 48 of the back layer 36. Furthermore, the peripheral edge part 50B located outside the center part 50A among the net members 50 is fixed to the inner end part of the flange part 42 of the roof side rails 14A and 14B via the rivets 52. The peripheral portion 50B corresponds to the second peripheral portion of the present invention.

  Further, the vehicle longitudinal direction end portion (peripheral portion 30B) of the solar cell module 11 (surface layer 30) and the peripheral portion 50B of the net member 50 are similarly fixed to the front header 18 and the rear header 22.

(Action)
The effect | action of the mounting structure 10 of the solar cell module comprised in this way is demonstrated.

  As the solar cell module 11 is shown in FIG. 2, since the surface layer 30 is formed from PC, weight reduction is achieved compared with the case where it was formed from inorganic glass.

  Further, in the solar cell module mounting structure 10, the peripheral portion 50B of the net member 50 in which the central portion 50A is fixed to the lower surface 48 of the back layer 36 of the solar cell module 11 is the flange portion 42 of the roof side rails 14A and 14B. It is fixed to. Further, the front header 18 and the rear header 22 are similarly fixed. As described above, the solar cell module 11 is directly fixed to the roof side rails 14A, 14B and the like with the adhesive 46, and is fixed to the roof side rails 14A, 14B and the like (supported from below) via the net member 50. Yes. Therefore, even if the rigidity of the solar cell module 11 is reduced by adopting PC for the surface layer 30 of the solar cell module 11 as compared with the case where the surface layer 30 is formed of inorganic glass, the metal net member The lowering of rigidity of the solar cell module 11 can be compensated by being supported at 50 from below.

  On the other hand, in this solar cell module mounting structure 10, since only the metal net member 50 is added to the existing structure, a plurality of metal reinforcements are provided between the roof side rails 14 </ b> A and 14 </ b> B as in Patent Document 1. An increase in the weight of the vehicle body can be suppressed as compared with the structure that spans over.

  Furthermore, even if a hot spot is formed in the solar cell module 11 due to a part of the solar cell module 11 being shaded, the central portion 50A of the net member 50 extends over the entire lower surface 48 of the back surface layer 36. Since they are joined, the heat of the hot spot is thermally conducted from the back layer 36 to the net member 50 and diffused. Thereby, the temperature rise of the hot spot in the solar cell module 11 is suppressed.

  Further, the solar cell module 11 is not only directly joined to the roof side rails 14A and 14B and the front header 18 and the rear header 22 by the adhesive 46, but also the roof side rails 14A and 14B and the front header 18 through the net member 50, Since it is fixed to the rear header 22, even when a large load is input to the solar cell module 11, it is possible to more reliably prevent or suppress the solar cell module 11 from being detached from the opening 24 of the vehicle.

  In the present embodiment, the solar cell module mounting structure in which the surface layer 30 and the back layer 36 are formed of PC and the sealing layer 34 is formed of EVA has been described. However, the surface layer 30, the sealing layer 34, The present invention can also be applied to a solar cell module mounting structure in which the back layer 36 is formed of another resin.

  In the present embodiment, the net member 50 is described as being made of metal, but any material having high impact resistance may be used. When the material itself has low rigidity, it is desirable to apply tension to the net member 50. The net member 50 is preferably a material having high thermal conductivity in consideration of heat dissipation. Furthermore, the net member 50 may be a planar member, not a net. In the present embodiment, the net member 50 is bonded to the lower surface 48 of the back layer 36 over the entire surface, but may be bonded to a part thereof. However, in consideration of heat dissipation with respect to the hot spot, it is preferable to join at least a region where the power generating element 32 is disposed.

DESCRIPTION OF SYMBOLS 10 Solar cell module mounting structure 11 Solar cell module 14A, 14B Roof side rail (vehicle frame member)
18 Front header (vehicle frame member)
22 Rear header (vehicle frame member)
30 surface layer 30B peripheral edge (first peripheral edge)
32 Power generation element 34 Sealing layer 50 Net member (planar member)
50B peripheral edge (second peripheral edge)

Claims (1)

A vehicle skeleton member that includes a sealing layer in which the power generation element is sealed and a surface layer made of a resin bonded to the light receiving surface side of the power generation element in the sealing layer, and is a first in a vehicle skeleton member that constitutes the roof of the vehicle body. A solar cell module having a fixed peripheral edge;
A planar member having a center portion fixed to the surface opposite to the light receiving surface side of the solar cell module, and a second peripheral edge portion fixed to the vehicle skeleton member;
A structure for mounting a solar cell module.

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