JP2009272567A - Solar cell, light collection type solar power generating module and method for manufacturing solar cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high heat resistance and reliability solar cell achieved by improving light collecting and optoelectric conversion efficiency, a light collection type solar power generation module, and a method for manufacturing the solar cell. <P>SOLUTION: The solar cell 10 includes an incidence plane 31 for allowing a solar light Ls to be incident therein, a column shaped optical member 30 having a light irradiation plane 32 that is disposed opposite to a solar cell element 11 to irradiate the solar light Ls onto the solar cell element 11, and a holding portion 40 for holding the column shaped optical member 30. The holding portion 40 includes a contact frame 41 that not only is in contact with a side surface 33 of the column shaped optical member 30 but also has the thickness t in a direction from the incidence plane 31 to the irradiation plane 32, and a holding body 42 for holding the contact frame 41 disposed away from the column shaped optical member 30. A side surface 33 of the column shaped optical member 30 is inclined so that the solar light Ls is totally reflected in a direction of the irradiation plane 32. The incidence plane 31 of the column shaped optical member 30 is designed to be a size so that an incidence plane light collection flux region FLRd formed by the solar light Ls is disposed inside thereof. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solar cell that includes a solar cell element that photoelectrically converts the concentrated sunlight and a columnar optical member that irradiates the solar cell element with the concentrated sunlight, and a concentrating type that includes such a solar cell. The present invention relates to a solar power generation module and a solar cell manufacturing method for manufacturing such a solar cell.

  As a solar power generation device, a non-condensing fixed type flat plate structure in which a solar power generation module configured by laying solar cell elements without gaps is installed on a roof or the like is common. On the other hand, a technique for reducing the amount of high-priced solar cell elements among members (parts) constituting the solar power generation apparatus has been proposed.

  In other words, by collecting sunlight using an optical lens or a reflecting mirror, and irradiating the collected sunlight to a small area solar cell element, the generated power per unit area of the solar cell element is increased, It has been proposed to reduce the cost of the solar cell element (that is, the cost of the solar power generation device).

  In general, the photoelectric conversion efficiency of the solar cell element is improved as the concentration factor is increased. However, if the position of the solar cell element is fixed, sunlight often enters as oblique light, and sunlight cannot be used effectively. Therefore, a tracking and concentrating solar power generation device with high condensing magnification configured to track the sun and always receive sunlight in front has been proposed (see, for example, Patent Document 1 to Patent Document 5).

  FIG. 7 is a cross-sectional view showing a configuration example of a concentrating solar power generation module applied to a conventional tracking concentrating solar power generation apparatus.

  The concentrating solar power generation module 101 according to the conventional example includes a condensing lens 150 that receives and condenses sunlight Ls incident parallel to the optical axis Lax and perpendicular to the incident surface, and a condensing lens 150. A solar cell 110 that photoelectrically converts the concentrated sunlight Ls. Moreover, the solar cell 110 includes a solar cell element 111 that photoelectrically converts the concentrated sunlight Ls, and a receiver substrate 120 on which the solar cell element 111 is placed.

  The wavelength region of sunlight Ls includes a medium / short wavelength region from a short wavelength of 400 nm to an intermediate wavelength of 1000 nm (1 μm), and a long wavelength region exceeding 1 μm. Therefore, among the sunlight Ls collected by the condenser lens 150, the sunlight Ls in the middle and short wavelength side region is collected toward the focal point FPb side, so that it is near the center of the solar cell element 111. The light is collected and constitutes a medium and short wavelength-side light collecting region FLRb. Further, since the sunlight Ls in the long wavelength side region is condensed toward the focal point FPc side, the long wavelength side is disposed on the medium / short wavelength side concentrated light flux region FLRb and the outer periphery thereof (for example, the outer periphery of the solar cell element 111). Condensed light flux region FLRc is formed.

  The conventional tracking concentrating solar power generation apparatus employs the concentrating solar power generation module 101 having a high condensing magnification by the action of the condensing lens 150.

  However, since the refraction by the condenser lens 150 is slightly different for each of a wide range of wavelengths included in the sunlight Ls, the refraction state is greatly different depending on the wavelength region. Therefore, as described above, sunlight Ls that is not condensed on the solar cell element 111 (the outer peripheral side region FLRcs of the long wavelength side concentrated light flux region FLRc) may be generated.

  In addition, alignment errors between the condenser lens 150 and the solar cell element 111, positional misalignment due to differences in temperature characteristics of members constituting the solar power generation module 101, and the like occur. A positional deviation occurs with respect to the center of 111 (optical axis Lax). In other words, there may be a positional shift of the sunlight Ls to be irradiated to the solar cell element 111, and as a result, the light collection efficiency may fluctuate and decrease.

  Therefore, the generation of sunlight Ls that is not aligned with the solar cell element 111 due to the difference in the refraction state depending on the wavelength region, the positional deviation between the constituent members, and the like causes a substantial decrease in the amount of incident light with respect to the solar cell element 111. Therefore, there is a problem that the photoelectric conversion efficiency and generated power (output) of the solar cell 110 (solar cell element 111) are lowered, and unnecessary loss occurs.

  In addition, when the misaligned sunlight Ls is irradiated to a region other than the solar cell element 111, a portion of the member irradiated with the thermal energy of the misaligned sunlight Ls (for example, an insulating film on the receiver substrate 120, There is a problem that the wiring, etc.) becomes high temperature and may be burnt (damaged) in some cases.

Moreover, since the solar cell element 111 generates heat due to the concentrated sunlight Ls, there is a problem that the photoelectric conversion efficiency is lowered and the generated power (output) is lowered.
JP 2002-289896 A JP 2002-289897 A JP 2002-289898 A JP 2006-275881 A JP 2007-201109 A

  This invention is made | formed in view of such a condition, The solar cell element, the receiver board | substrate with which the solar cell element was mounted, and the sunlight condensed by the condensing lens to a solar cell element without waste A solar cell including a columnar optical member to be irradiated and a holding unit that holds the columnar optical member, and is a frame-shaped member that is in contact with the side surface of the columnar optical member and has a thickness from the incident surface to the irradiation surface. The holding frame is provided with a contact frame body and a support body that is arranged away from the columnar optical member and supports the contact frame body, and the side surface of the columnar optical member is inclined so as to totally reflect sunlight toward the irradiation surface. In addition, the incident light collection area formed by the collected sunlight on the incident surface is located inside the incident surface, so that the fluctuation of the light collection characteristic is prevented and the light collection characteristic is improved. To improve the light collection efficiency and photoelectric conversion efficiency. And to provide a sex and reliable solar cell.

  Moreover, this invention is a concentrating solar power generation module provided with the solar cell which photoelectrically converts the sunlight condensed with the condensing lens, Comprising: The solar cell which improved the condensing efficiency and heat dissipation is provided. Thus, another object is to provide a concentrating solar power generation module having improved heat generation efficiency and power generation and having high heat resistance and high reliability.

  The present invention also includes a receiver substrate on which a solar cell element is placed, a columnar optical member that irradiates the solar cell element with sunlight collected by a condensing lens without waste, and a side surface of the columnar optical member. The solar cell for manufacturing a solar cell comprising: a frame-shaped contact frame body and a support member disposed apart from the columnar optical member and supporting the contact frame body, and a holding unit erected on the receiver substrate A battery manufacturing method comprising: a support fixing step for fixing a support to a receiver substrate; a translucent resin injecting step for injecting a translucent resin into the inner resin stopper; A heat-resistant and highly reliable solar cell with improved light collection efficiency and photoelectric conversion efficiency by including a columnar optical member mounting step for placing the irradiated surface on a translucent resin in contact with the body Made of solar cells that can be manufactured at low cost with good productivity To provide a method and other purposes.

  A solar cell according to the present invention includes a solar cell element that photoelectrically converts sunlight collected by a condenser lens, a receiver substrate on which the solar cell element is placed, and an incident light that causes the collected sunlight to enter. A columnar optical member having a surface and an irradiation surface arranged to face the solar cell element and irradiating the solar cell element with sunlight, and a holding unit standing on the receiver substrate and holding the columnar optical member. The holding unit includes a frame-shaped contact frame that is in contact with a side surface of the columnar optical member and has a thickness from the incident surface toward the irradiation surface, and the columnar optical member. A support body that is disposed apart from the member and supports the contact frame, and the side surface is inclined so as to totally reflect incident sunlight in the direction of the irradiation surface. Concentrated light flux formed by the concentrated sunlight Frequency is equal to or a certain incident plane condensing light beam region formed on the incident surface as the size is located inside of.

  With this configuration, when the collected sunlight (collected light beam region) is misaligned with respect to the center of the columnar optical member, the incident surface collected light beam region is reliably positioned within the region of the incident surface to collect light. It is possible to prevent fluctuations in characteristics, and it is possible to disperse the heat applied to the columnar optical member by the concentrated sunlight to the surrounding space by the side surface and the contact frame, so that the light collection efficiency And it can be set as the heat resistant and highly reliable solar cell which improved the photoelectric conversion efficiency.

  In the solar cell according to the present invention, the side surface has an inclination angle of 8 degrees to 20 degrees with respect to a direction perpendicular to the irradiation surface.

  With this configuration, it is possible to irradiate the solar cell element with the sunlight that has entered the columnar optical member that is reliably and accurately totally reflected from the side surface, so that the light collection efficiency and the photoelectric conversion efficiency can be improved. .

  In the solar cell according to the present invention, the irradiation surface has a size located inside the solar cell element.

  With this configuration, it is possible to prevent the receiver substrate from being irradiated with unnecessary sunlight that does not contribute to photoelectric conversion. Therefore, it is possible to prevent the receiver substrate from being burned and to obtain a highly reliable solar cell.

  In the solar cell according to the present invention, the contact frame is rectangular, and the support is arranged in a column shape at four corners of the contact frame.

  With this configuration, the contact frame body and the columnar optical member can be aligned with high accuracy, and the solar cell element is obtained by the chimney effect in the space provided around the solar cell element and the columnar optical member. In addition, since it is possible to effectively dissipate the columnar optical member, the photoelectric conversion efficiency can be improved.

  Further, the concentrating solar power generation module according to the present invention includes a condensing lens that condenses sunlight and enters the solar cell, and a solar cell that photoelectrically converts the sunlight collected by the condensing lens, It is a concentrating solar power generation module provided with this, Comprising: The said solar cell is a solar cell which concerns on this invention, It is characterized by the above-mentioned.

  With this configuration, the light collection efficiency is not reduced even when the incident light collection region formed on the incident surface by the collected sunlight is displaced from the center of the incident surface. Thus, it is possible to provide a concentrating solar power generation module with improved heat resistance and high reliability with improved conversion light rate.

  In the concentrating solar power generation module according to the present invention, the minimum light collection region where the light collection region is minimum is configured to be located inside the columnar optical member.

  With this configuration, it is possible to suppress the energy density in the light collecting area of the incident surface by positioning the focus group by the condensing lens inside the columnar optical member. It is possible to prevent burning of the columnar optical member on the surface and to obtain a highly reliable concentrating solar power generation module.

  Further, in the concentrating solar power generation module according to the present invention, the thickness of the contact frame is a thickness that shields the outer peripheral side region of the long wavelength side concentrated light flux region formed by the long wavelength side sunlight. It is characterized by being.

  With this configuration, it is possible to shield the long wavelength region of sunlight with the contact frame and prevent the long wavelength side of the sunlight from irradiating the receiver substrate. Photoelectric conversion efficiency can be improved.

  In the concentrating solar power generation module according to the present invention, the minimum concentrated light flux region is configured to be positioned between a bottom portion of the contact frame body and the irradiation surface.

  With this configuration, it is possible to cause total reflection on the side surface of the columnar optical member at a position where the columnar optical member is not in contact with the contact frame body. Efficiency can be stabilized and the output characteristics of the solar cell can be stabilized.

  In the concentrating solar power generation module according to the present invention, the focal point group formed by the focal point of the condensing lens that is displaced in accordance with a temperature change of the condensing lens is between the bottom portion and the irradiation surface. It is characterized by being located.

  With this configuration, when the focal point is displaced due to a temperature change of the condensing lens, it is possible to cause total reflection on the side surface at a position not in contact with the contact frame body, stabilizing the light collection efficiency. The output characteristics of the solar cell can be stabilized.

  Further, in the concentrating solar power generation module according to the present invention, when the intermittent tracking control mode in which the position of the solar cell is moved in advance to the destination of the sun on the solar orbit every specified time, the incident surface is The concentrated light flux region is configured to be located inside the incident surface.

  With this configuration, even when the intermittent tracking control is performed to move the solar cell ahead of time, it is possible to suppress and stabilize the variation in the light collection efficiency of the solar cell. It can be stabilized and it can be set as a reliable concentrating solar power generation module.

  Moreover, the solar cell manufacturing method according to the present invention includes a solar cell element that photoelectrically converts sunlight condensed by a condenser lens, a receiver substrate on which the solar cell element is placed, and concentrated sunlight. A columnar optical member having an incident surface on which the solar cell element is incident and an irradiation surface that is arranged to face the solar cell element and irradiates the solar cell element with sunlight, and a frame-like shape that is in contact with the side surface of the columnar optical member Solar cell manufacturing for manufacturing a solar cell comprising a contact frame and a support member that is disposed apart from the columnar optical member and supports the contact frame, and a holding portion that is erected on the receiver substrate A substrate preparing step for preparing the receiver substrate on which the solar cell element is placed, and a translucent resin for sealing the solar cell element by applying an adhesive resin to the receiver substrate. Inner resin stopper and injected A resin stopper forming step for forming an outer resin stopper that fixes the support on the outside of the inner resin stopper, and curing the adhesive resin by bonding the support to the outer resin stopper. A support fixing step of fixing the support to the receiver substrate, a translucent resin injection step of injecting the translucent resin inside the inner resin stopper, and the columnar optical member at the contact frame. A columnar optical member placing step for placing the irradiated surface on the translucent resin in contact with the resin, and a resin sealing portion forming step for curing the translucent resin to form a resin sealing portion It is characterized by providing.

  With this configuration, when the collected sunlight (collected light flux region) is misaligned with respect to the center of the columnar optical member, the incident surface collected light flux region is positioned within the area of the incident surface, and the light collecting characteristics are improved. A heat-resistant and highly reliable solar cell that prevents the fluctuation and improves the light collection efficiency and photoelectric conversion efficiency by dispersing the heat applied to the columnar optical member by the concentrated sunlight by the contact frame. Can be manufactured easily and with high accuracy.

  According to the solar cell of the present invention, the solar cell element that photoelectrically converts the sunlight collected by the condenser lens, the receiver substrate on which the solar cell element is placed, and the collected sunlight are incident A columnar optical member having a light incident surface and an irradiation surface that is disposed to face the solar cell element and irradiates the solar cell element with sunlight, and a holding unit that is erected on the receiver substrate and holds the columnar optical member The holding portion is in contact with a side surface of the columnar optical member and has a frame-like contact frame having a thickness from the incident surface toward the irradiation surface; and A support body that is disposed apart from the columnar optical member and supports the abutting frame, and the side surface is inclined so as to totally reflect incident sunlight in the direction of the irradiation surface. The surface is formed by the concentrated sunlight Since the light flux area is sized so that the incident light collecting light flux area formed on the incident surface is located on the inner side, the concentrated sunlight (collected light flux area) is displaced from the center of the columnar optical member. In this case, it is possible to prevent the fluctuation of the condensing characteristic by reliably positioning the incident surface collecting light flux region within the region of the incident surface, and to reduce the heat applied to the columnar optical member by the collected sunlight. In addition, since the contact frame can disperse to the surrounding space, it is possible to obtain a solar cell with high heat resistance and high reliability with improved light collection efficiency and photoelectric conversion efficiency.

  Further, according to the concentrating solar power generation module according to the present invention, the condensing lens that condenses the sunlight and enters the solar cell, and the sun that photoelectrically converts the sunlight condensed by the condensing lens A concentrating solar power generation module including a battery, wherein the solar battery is a solar battery according to the present invention, and therefore, an incident surface collecting light flux region formed on an incident surface by the condensed sunlight is provided. A concentrating solar power generation module with high heat resistance and high reliability that improves condensing efficiency and conversion light rate without lowering condensing efficiency even when positional deviation occurs with respect to the center of the incident surface. It is possible to do this.

  Moreover, according to the solar cell manufacturing method of the present invention, the solar cell element that photoelectrically converts the sunlight collected by the condenser lens, the receiver substrate on which the solar cell element is placed, and the solar cell element A columnar optical member having an incident surface on which sunlight is incident and an irradiation surface arranged to face the solar cell element and irradiating the solar cell element with sunlight, and a frame in contact with a side surface of the columnar optical member The solar cell for manufacturing a solar cell comprising: a contact frame body and a support member disposed apart from the columnar optical member and supporting the contact frame body, and a holding unit erected on the receiver substrate A battery manufacturing method, comprising: a substrate preparation step for preparing the receiver substrate on which the solar cell element is placed; and a light-transmitting property in which an adhesive resin is applied to the receiver substrate and the solar cell element is resin-sealed. Inner resin stopper where resin is injected And a resin stopper forming step of forming an outer resin stopper to which the support is fixed outside the inner resin stopper, and the adhesive is cured by bonding the support to the outer resin stopper. A support fixing step for fixing the support to the receiver substrate, a translucent resin injection step for injecting the translucent resin inside the inner resin stopper, and the contact between the columnar optical members A columnar optical member placing step for placing the irradiation surface on the translucent resin in contact with a frame, and a resin sealing portion forming step for curing the translucent resin to form a resin sealing portion Therefore, when the collected sunlight (collected light beam region) is displaced with respect to the center of the columnar optical member, the incident surface collected light beam region is positioned within the region of the incident surface to collect light. Prevents fluctuations in characteristics, and the concentrated sunlight enters the columnar optical member. An effect that can be produced easily and highly accurately the light collection efficiency and the photoelectric heat resistance and highly reliable solar cell conversion efficiency improves by dispersing obtain heat by abutting frame member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
Based on FIG. 1A thru | or FIG. 3B, the solar cell and concentrating solar power generation module which concern on this Embodiment are demonstrated.

  1A is a transparent side view transparently showing a schematic configuration of a surface including an optical axis of a solar cell and a concentrating solar power generation module according to Embodiment 1 of the present invention. FIG.

  FIG. 1B is a perspective view showing the outer appearance of the holding portion and the columnar optical member of the solar cell shown in FIG. 1A as viewed obliquely from above.

  The solar cell 10 according to the present embodiment is condensed with a solar cell element 11 that photoelectrically converts sunlight Ls collected by the condenser lens 50, and a receiver substrate 20 on which the solar cell element 11 is placed. A columnar optical member 30 having an incident surface 31 on which the solar light Ls is incident and an irradiation surface 32 that is disposed to face the solar cell element 11 and that irradiates the solar cell element 11 with the solar light Ls, and stands on the receiver substrate 20. And a holding portion 40 that holds the columnar optical member 30.

  The holding portion 40 is separated from the columnar optical member 30 and the frame-shaped abutting frame body 41 that is in contact with the side surface 33 of the columnar optical member 30 and has a thickness t in the direction from the incident surface 31 to the irradiation surface 32. And a support body 42 that is disposed and supports the contact frame body 41.

  The side surface 33 of the columnar optical member 30 is inclined so that the incident sunlight Ls is totally reflected in the direction of the irradiation surface 32, and the incident surface 31 of the columnar optical member 30 is caused by the condensed sunlight Ls. The collected light flux region FLR formed is sized so that the incident light flux collection region FLRd formed on the incident surface 31 is positioned inside.

  Therefore, with this configuration, the incident sunlight Ls (collected light flux region FLR) is incident when the positional deviation (see FIGS. 4 and 5) occurs with respect to the center (optical axis Lax) of the columnar optical member 30. It is possible to reliably position the surface collection light flux region FLRd within the region of the incident surface 31 to prevent fluctuations in the light collection characteristics of the solar cell 10, and the condensed sunlight Ls is applied to the columnar optical member 30. Since the applied heat can be distributed to the surrounding space by the side surface 33 and the contact frame 41, the solar cell 10 having high heat resistance and high reliability with improved light collection efficiency and photoelectric conversion efficiency can be obtained. it can.

  The side surface 33 has an inclination angle θ of 8 degrees to 20 degrees with respect to the vertical direction of the irradiation surface 32 (the optical axis Lax direction, that is, the vertical direction with respect to the light receiving surface of the solar cell element 11). Therefore, it is possible to irradiate the solar cell element 11 with the sunlight Ls incident on the columnar optical member 30 reliably and highly accurately on the side surface 33, so that the light collection efficiency and the photoelectric conversion efficiency of the solar cell 10 are achieved. Can be reliably improved.

  The irradiation surface 32 has a size located inside the solar cell element 11 (outer periphery). Therefore, the sunlight Ls irradiated to the solar cell element 11 from the irradiation surface 32 is reliably irradiated only to the solar cell element 11. That is, since unnecessary sunlight Ls that does not contribute to photoelectric conversion can be prevented from being irradiated to the receiver substrate 20, it is possible to prevent burnout of the receiver substrate 20 on which the wiring for the solar cell element 11 is formed and to provide a highly reliable solar. The battery 10 can be obtained.

  The columnar optical member 30 can be made of, for example, glass, heat-resistant glass, general transparent resin, or the like. It is desirable to apply a material having characteristics that can withstand the high energy density of the concentrated sunlight Ls. That is, heat-resistant glass that can withstand the temperature rise and sudden temperature change caused by sunlight Ls is particularly desirable, but is not limited thereto.

  The contact frame body 41 has a rectangular shape, and the support bodies 42 are arranged in columns at the four corners of the contact frame body 41. Therefore, it becomes possible to align the contact frame body 41 and the columnar optical member 30 with high accuracy, and in the space provided around the solar cell element 11 and the columnar optical member 30 (side surface 33). Since the solar cell element 11 and the columnar optical member 30 can be effectively radiated by the chimney effect, the photoelectric conversion efficiency can be improved.

  That is, since the region where the total reflection of the side surface 33 occurs is exposed to the space without contacting the contact frame body 41, the thermal energy generated by the sunlight Ls supplied to the columnar optical member 30 is efficiently generated. It becomes possible to discharge into the space, and the heat resistance of the solar cell 10 (solar cell element 11) can be improved.

  In addition, groove portions 41 g are formed in the corner portions (corner portions) inside the contact frame body 41 (portions in contact with the columnar optical member 30) so as to correspond to the corners of the columnar optical member 30. That is, since the corners of the columnar optical member 30 are arranged in the space formed by the groove 41g, the corners of the columnar optical member 30 are not in direct contact with the contact frame body 41, and there is no possibility of damage during assembly. Further, since the side surface 33 and the inner side surface of the contact frame body 41 are respectively configured as flat surfaces, they can be contacted with high accuracy and can be positioned with high accuracy.

  The groove 41g can be filled with an adhesive resin to improve the adhesive strength between the columnar optical member 30 and the holding unit 40, and the mechanical strength is improved to improve the stability of the columnar optical member 30. Can be made. In addition, the minimum light collection region FLRs where the light collection region FLR is minimum is configured to be positioned on the irradiation surface 32 side with respect to the contact frame 41. Therefore, since the sunlight Ls does not irradiate the side surface 33 on the inner side surface of the contact frame body 41, there is no influence on the sunlight Ls. That is, even when the groove 41g is filled with the adhesive resin, it does not adversely affect the light collecting characteristics.

  For example, a metal such as aluminum, iron, or stainless steel, or a synthetic resin such as polyethylene can be applied to the holding unit 40. It is desirable to use a metal in consideration of heat dissipation and thermal expansion characteristics. Moreover, it is desirable to use aluminum from a viewpoint of weight reduction and cost reduction.

  An inner resin stopper portion 21 is formed in a ring shape (frame shape) around the solar cell element 11, and a resin sealing portion 25 of a translucent resin is formed inside the inner resin stopper portion 21. . That is, the inner resin stopper 21 is used as a resin stopper when the resin sealing portion 25 is formed by resin sealing between the solar cell element 11 and the irradiation surface 32 with a translucent resin. The resin sealing portion 25 can reliably protect the surface of the solar cell element 11 to eliminate the influence from the external environment, and the solar cell 10 having excellent weather resistance can be obtained.

  It is desirable that the translucent resin constituting the resin sealing portion 25 has high light transmissivity and excellent adhesiveness. For example, an epoxy resin, a silicone resin, or the like can be applied. The resin sealing portion 25 covers the surface of the solar cell element 11 and improves the water resistance and moisture resistance of the solar cell element 11. Further, it is bonded to the columnar optical member 30 (incident surface 31) and has an action of fixing the columnar optical member 30.

  An outer resin stopper 22 is formed outside the inner resin stopper 21. The outer resin stopper 22 is disposed to adhere and fix the support 42. Therefore, it can be formed only at a position corresponding to the support 42, but it can also be formed in an annular shape (frame shape) like the outer resin stopper 22. In the case of an annular shape (frame shape), when the resin sealing portion 25 is formed, the translucent resin filled in the inner resin stopper portion 21 is pushed out from the inner resin stopper portion 21 by the columnar optical member 30. Since the translucent resin is stopped by the outer resin stopper 22, it is possible to prevent the occurrence of process defects.

  The inner resin stopper 21 and the outer resin stopper 22 are preferably formed of an adhesive synthetic resin. For example, an epoxy resin, a silicone resin, or the like can be applied.

  The concentrating solar power generation module 1 according to the present embodiment condenses the sunlight Ls and makes it incident on the solar cell 10, and photoelectrically converts the sunlight Ls condensed by the condenser lens 50. A solar cell 10 to be converted. Therefore, even when the incident surface collected light beam region FLRd formed on the incident surface 31 by the condensed sunlight Ls is misaligned with respect to the center of the incident surface 31 (optical axis Lax), the incident surface collected light beam region. Since the FLRd can be formed inside the incident surface 31, the condensing characteristic does not vary.

  That is, in the concentrating solar power generation module 1 according to the present embodiment, when the incident surface collection light flux region FLRd is misaligned with respect to the center of the incident surface 31, there is no possibility that the light collection efficiency is lowered. It is possible to improve the light collection efficiency and the conversion light rate, and to realize high heat resistance and reliability.

  Further, the minimum light collection region FLRs where the light collection region FLR is minimum is configured to be located inside the columnar optical member 30. Therefore, the position of the focus group FPg (see FIG. 3A) by the condensing lens 50 can be positioned inside the columnar optical member 30 to suppress the energy density in the incident surface concentrated light flux region FLRd. In other words, for example, when dust adheres to the surface of the incident surface 31, it prevents the dust from burning due to high thermal energy caused by the concentrated sunlight Ls and burning the columnar optical member 30, thereby providing a highly reliable collection. The optical solar power generation module 1 can be obtained.

  Desirably, the minimum light collection region FLRs is positioned between the bottom 41b of the contact frame 41 and the irradiation surface 32. That is, since it is possible to cause total reflection at the side surface 33 of the columnar optical member 30 at a position where the columnar optical member 30 is not in contact with the contact frame body 41, there is no reflection loss due to the contact frame body 41. The light collection efficiency can be stabilized and the output characteristics of the solar cell 10 can be stabilized.

  It should be noted that the size of the entrance surface concentrated light flux region FLRd can be set by optically calculating the condensing characteristic, size, and distance of the condensing lens 50 with respect to the solar cell 10. In addition, the size and position of the minimum light collection region FLRs are determined by optically determining the condensing characteristic, size, and distance of the condensing lens 50 with respect to the solar cell 10 and further the size and distance of the columnar optical member 30 with respect to the solar cell element 11. It is possible to calculate and obtain the setting.

<Embodiment 2>
Based on FIG. 2, the solar cell and the concentrating solar power generation module according to the present embodiment will be described. Since the basic configuration of the solar cell and the concentrating solar power generation module according to the present embodiment is the same as that of the first embodiment, the reference numerals are appropriately used and different items will be mainly described.

  FIG. 2 is a side view conceptually showing the characteristics of the solar cell and the concentrating solar power generation module according to Embodiment 2 of the present invention with respect to the sunlight wavelength.

  The wavelength region of sunlight Ls includes a medium / short wavelength region from a short wavelength of 400 nm to an intermediate wavelength of 1000 nm (1 μm), and a long wavelength region exceeding 1 μm. Among the sunlight Ls collected by the condensing lens 50, the sunlight Ls in the medium / short wavelength side region is condensed near the center of the incident surface 31 to form the medium / short wavelength side light collecting beam region FLRb. Further, the sunlight Ls in the long wavelength side region has a long wavelength side concentrated light beam region FLRc on the medium and short wavelength side concentrated light beam region FLRb and its outer periphery (the outer periphery of the incident surface 31 and further the region corresponding to the contact frame 41). Configure.

  The sunlight Ls in the medium and short wavelength side region (400 nm to 1000 nm) contributes to the photoelectric conversion of the solar cell element 11 as it is. Therefore, the medium / short wavelength side concentrated light flux region FLRb, which is the concentrated light flux region formed by the medium / short wavelength side region (400 nm to 1000 nm), is configured to be surely irradiated to the solar cell element 11.

  In the present embodiment, the medium-short wavelength-side light collecting flux region FLRb is incident on the incident surface 31, travels inside the columnar optical member 30, and is totally reflected by the side surface 33. In other words, the incident surface 31 is configured such that the medium and short wavelength side concentrated light flux region FLRb is positioned inside the incident surface 31. In other words, the medium-short wavelength-side concentrated light flux region FLRb is configured to be positioned inside the incident surface 31 by the condenser lens 50.

  On the other hand, not all the sunlight Ls in the long wavelength region (over 1 μm) contributes to the photoelectric conversion of the solar cell element 11, and the energy required to contribute to the photoelectric conversion is about two-thirds of the incident energy. If it is good. Further, the sunlight Ls in the long wavelength side region has an effect of increasing the temperature of the solar cell 10 and decreasing the photoelectric conversion efficiency.

  Therefore, in the present embodiment, a part of the outer peripheral side of the long wavelength side concentrated light flux region FLRc (the middle short wavelength side concentrated light flux region FLRb), which is the concentrated light flux region formed by the sunlight Ls in the long wavelength side region (greater than 1 μm). The outer peripheral side area FLRcs) is shielded by the contact frame 41 (thickness t). That is, the outer peripheral side region FLRcs of the long wavelength side concentrated light flux region FLRc formed by the sunlight Ls in the long wavelength side region is a region corresponding to the top surface of the contact frame 41 and the thickness t on the outer periphery of the incident surface 31. The light is condensed by the condensing lens 50 at a light shielding position.

  That is, the thickness t of the contact frame 41 is a thickness that shields the outer peripheral side region FLRcs of the long-wavelength side concentrated light flux region FLRc formed by the long-wavelength side region of sunlight Ls. With this configuration, the long wavelength side region of the sunlight Ls can be shielded by the contact frame 41 and the receiver substrate 20 can be prevented from being irradiated with the sunlight Ls. Thus, the photoelectric conversion efficiency can be improved.

  When the solar cell element 11 is a multi-junction solar cell, the design current value of the bottom layer is about 1.8 times greater than that of the top layer and the middle layer, and thus it is not necessary to absorb the wavelengths of all regions. Therefore, it is possible to eliminate a temperature increase due to sunlight Ls in the long wavelength side region by providing the top surface of the contact frame 41 and the portion of the thickness t with a light shielding characteristic for the long wavelength side region. On the contrary, the incident surface collecting light flux region FLRd corresponding to the medium and short wavelength side region is positioned on the incident surface 31 with high accuracy and is totally reflected by the side surface 33, thereby generating a heat shielding effect, and the incident surface collection. It is possible to prevent the output from being reduced due to the positional deviation of the light flux region FLRd and to ensure the stabilization of the output.

<Embodiment 3>
Based on FIG. 3A and FIG. 3B, the solar cell and the concentrating solar power generation module according to the present embodiment will be described. Since the basic configuration of the solar cell and the concentrating solar power generation module according to the present embodiment is the same as that of the first embodiment and the second embodiment, the reference numerals are appropriately used and different items are mainly used. explain.

  FIG. 3A is a side view conceptually showing a focus displacement state with respect to sunlight wavelength due to temperature characteristics of a condensing lens in the solar cell and the concentrating solar power generation module according to Embodiment 3 of the present invention.

  FIG. 3B is a plan view conceptually showing a displacement state of the incident surface collecting light flux region on the incident surface of the solar cell shown in FIG. 3A.

  The condensing lens 50 according to the present embodiment is, for example, a Fresnel lens formed of silicone resin. When the temperature of the silicone resin changes, for example, from 20 ° C. to 40 ° C., for example, the refractive index for a wavelength of 650 nm changes from 1.409 (20 ° C.) to 1.403 (40 ° C.) corresponding to the change in temperature. . Note that the change in refractive index occurs for all wavelengths.

  Accordingly, the collected light flux region FLR when the temperature changes varies according to the temperature. For example, when temperature T1> temperature T2> temperature T3, the collected light beam region FLR (T1) at the temperature T1 <the collected light beam region FLR (T2) at the temperature T2 <the collected light beam region FLR (at the temperature T3). T3). Further, the relationship between the incident surface collected light beam region FLRd (T1) at the temperature T1, the incident surface collected light beam region FLRd (T2) at the temperature T2, and the incident surface collected light beam region FLRd (T3) at the temperature T3 is as follows. Incident surface collected light beam region FLRd (T1) <incident surface collected light beam region FLRd (T2) <incident surface collected light beam region FLRd (T3).

  That is, the positions of the focal point FP (T1) at the temperature T1, the focal point FP (T2) at the temperature T2, and the focal point FP (T3) at the temperature T3 are the focal point FP (T1) and the focal point in order from the incident surface 31, respectively. FP (T2) and focus FP (T3). Therefore, the focal point FP (T1), the focal point FP (T2), and the focal point FP (T3) are a set of focal points FP, and constitute a focal point group FPg.

  That is, when the temperature of the condensing lens 50 changes between the temperature T1 and the temperature T3, the focal point FP causes a focus shift Sfp, and the condensing characteristic of the condensing lens 50 is changed. Further, the incident surface collection light flux region FLRd on the incident surface 31 changes under the influence of the change in the refractive index.

  The diameter of the condenser lens 50 is, for example, 30 cm, and the distance between the condenser lens 50 and the solar cell element 11 is, for example, 30 cm. With this shape, the incident surface collecting light flux region FLRd (T1) is about 6.5 mm in diameter at a temperature T1 (for example, 40 ° C.), and the incident surface collecting light flux region FLRd (T2) is at a temperature T2 (for example, 30 ° C.). When the diameter is about 7 mm and the temperature T3 (for example, 20 ° C.), the incident surface concentrated light flux region FLRd (T3) has a diameter of about 7.5 mm, the side length w of the incident surface 31 that is rectangular is set to, for example, 9.4 mm. In this case, the incident surface collecting light flux region FLRd is always incident on the inside of the incident surface 31 even if there is a change in the condensing characteristic due to a temperature change, so that the fluctuation of the condensing characteristic can be substantially prevented. It becomes possible.

  At this time, the focal shift Sfp from the focal point FP (T1) to the focal point FP (T3) was about 10 mm. Therefore, the distance from the bottom 41b of the contact frame 41 to the irradiation surface 32 may be at least 10 mm.

  As described above, in the present embodiment, the focal point group FPg formed by the focal point FP of the condensing lens 50 that is displaced in accordance with the temperature change of the condensing lens 50 is the bottom 41b of the contact frame 41 and the irradiation surface 32. It is as a structure located between. Therefore, when the focal point is displaced due to the temperature change of the condensing lens 50, it is possible to cause total reflection on the side surface 33 at a position not in contact with the contact frame body 41, thereby stabilizing the light collection efficiency. Thus, the output characteristics of the solar cell 10 can be stabilized.

  Further, since the focal point FP is located between the bottom 41b of the contact frame 41 and the irradiation surface 32, the position of the focal point FP is prevented from moving to a position corresponding to the outer periphery of the holding unit 40. Even when Ls irradiates the receiver substrate 20 exceptionally, it is possible to suppress the thermal energy density of the collected light flux region FLR on the surface of the receiver substrate 20, thereby preventing a rise in the temperature of the receiver substrate 20. And burnout can be avoided.

<Embodiment 4>
Based on FIG. 4, the solar cell and the concentrating solar power generation module according to the present embodiment will be described. Since the basic configuration of the solar cell and the concentrating solar power generation module according to the present embodiment is the same as that in the first to third embodiments, the reference numerals are appropriately used, and mainly different matters. explain.

  FIG. 4 is a tracking diagram conceptually showing the relationship between the tracking state when the concentrating photovoltaic power generation module according to Embodiment 4 of the present invention is subjected to intermittent tracking control and the incident surface concentrated light flux region formed on the incident surface. It is a state conceptual diagram, (A) is the state where the concentrating solar power generation module is directly facing the sunlight, (B) is moving the concentrating solar power generation module ahead of the sunlight (C) shows a state where the moved concentrating solar power generation module faces again by the movement of sunlight, and (D) shows that the concentrating solar power generation module is delayed by the movement of sunlight. Each of these states is shown.

  The concentrating solar power generation module 1 (solar cell 10) according to the present embodiment is configured to face the sunlight Ls by so-called tracking control. That is, since the incident direction of sunlight Ls with respect to the concentrating solar power generation module 1 (incident surface 31) varies along the solar moving direction SSD, the concentrating solar power generation module 1 is controlled by the tracking control unit 5. It is configured to be intermittently driven to rotate with respect to the sun azimuth and to be intermittently driven to tilt with respect to the solar altitude. In FIG. 4, only the state of the turning drive is shown for easy understanding, but the same drive control is executed for the tilting drive as well as the turning drive.

  In order to efficiently execute the tracking control, the tracking control for the concentrating solar power generation module 1 is executed at specified time intervals. That is, the tracking control by the tracking control unit 5 is a so-called intermittent tracking control mode. Note that the shape of the concentrating solar power generation module 1 (the diameter of the condensing lens 50 and the interval between the condensing lens 50 and the solar cell element 11) is the same as that in the fourth embodiment.

  The intermittent tracking control can be executed as follows, for example.

  The concentrating solar power generation module 1 located at a position delayed with respect to the sunlight Ls (position immediately before the same figure (A)) is driven to turn in the direction of the arrow Rot so as to face the sunlight Ls. The state ((A) in the figure) is passed, and the sunlight Ls is moved to the overtaken position and fixed ((B) in the figure).

  The turning angle when the concentrating solar power generation module 1 passes the sunlight Ls is, for example, +0.05 degrees at the maximum angle with respect to the directly facing position. When the length w of the side of the entrance surface 31 is 9.4 mm and the diameter of the entrance surface collection beam region FLRd is 7 mm, the swivel deviation dw of the entrance surface collection beam region FLRd is 1 mm with respect to the time of the front.

  The sunlight Ls faces the concentrating solar power generation module 1 moved to a position advanced with respect to the sunlight Ls (FIG. 5B) while facing the incident light collecting light flux region FLRd again (same as above). It passes through the figure (C)) and moves to a position (Drawing (D)) that has passed the concentrating solar power generation module 1.

  The turning angle when the sunlight Ls passes the concentrating solar power generation module 1 is set to, for example, -0.05 degrees at the maximum angle with respect to the directly facing position. Therefore, on the opposite side to the time when the concentrating solar power generation module 1 passes the sunlight Ls, the swivel deviation dw of the incident surface collection light flux region FLRd is 1 mm with respect to the time of facing.

  Therefore, whether the concentrating solar power generation module 1 overtakes the solar light Ls or the solar light Ls overtakes the concentrating solar power generation module 1, the maximum value of the turning angle is obtained. Since the swivel deviation dw with respect to the time when the incident surface concentrated light flux region FLRd is directly facing can be set to a sufficiently small value with respect to the size of the incident surface 31, an intentional positional deviation by tracking control (swivel control). Even when the operation is executed, the light collection characteristic does not fluctuate and the light collection efficiency is not lowered.

  Further, the tilt angle in the tilt drive can be ± 0.025 degrees at the maximum angle, and the tilt shift can be 0.5 mm. That is, since the tilt deviation of the incident surface collected light flux region FLRd at the maximum tilt angle with respect to the front-facing time can be set to a sufficiently small value with respect to the size of the incident surface 31, tracking control (tilt Even when an intentional positional shift operation by control) is executed, the light collection efficiency is not lowered.

  As described above, in the concentrating solar power generation module 1 according to the present embodiment, the position of the solar cell 10 (concentrating solar power generation module 1) is advanced to the destination of the sun on the solar orbit every specified time. When the intermittent tracking control mode is moved, the incident surface collection light flux region FLRd is configured to be located inside the incident surface 31.

  Therefore, even when intermittent tracking control is performed in which the sun is moved in advance to the destination of the sun, it is possible to suppress the fluctuation of the light collection characteristics of the solar cell 10 and stabilize the light collection efficiency. Thus, the highly reliable concentrating solar power generation module 1 can be obtained.

<Embodiment 5>
Based on FIG. 5, the concentrating solar power generation module according to the present embodiment will be described. Since the basic configuration of the concentrating solar power generation module according to the present embodiment is the same as that of the first to fourth embodiments, the reference numerals are appropriately used and different items will be mainly described.

  FIG. 5 shows an incident surface formed on a setting angle shift and an incident surface when an assembly error occurs between the condensing lens and the solar cell of the concentrating solar power generation module according to Embodiment 5 of the present invention. It is explanatory drawing which illustrates the relationship with a condensing light beam area | region conceptually.

  The positional deviation between the incident light collection light flux region FLRd formed on the incident surface 31 and the center (optical axis Lax) of the incident surface 31 is not limited to the above-described operation but is caused by an assembly error in the manufacturing process. May occur. That is, high-precision parallelism is required between the solar cell 10 (solar cell element 11) and the condenser lens 50. However, the condensing lens 50 may be assembled as the concentrating solar power generation module 1 in a state in which the set angle deviation α is generated by deviating from the original parallel position with respect to the solar cell 10.

  When such an assembly error of the condensing lens 50 with respect to the solar cell 10 is accompanied, the sunlight Ls (collected light beam region FLR) collected by the condensing lens 50 is displaced with respect to the incident surface 31. That is, the incident surface collection light beam region FLRds that is displaced in the lateral direction is formed on the incident surface 31 with respect to the incident surface collection light beam region FLRd having no positional deviation.

  As shown in the fourth embodiment, when the length w of the side of the entrance surface 31 is 9.4 mm and the diameter of the entrance surface collection light flux region FLRd is 7 mm, the set angle deviation α is a maximum value, for example, 0.1 degree. , The misaligned incident surface collective light flux region FLRds is displaced by a maximum of 1 mm from the original incident collective light flux region FLRd. That is, even when the condensing lens 50 is displaced in any direction, the incident surface collection light flux region FLRds can be positioned inside the incident surface 31. Therefore, it is possible to obtain a highly reliable concentrating solar power generation module 1 with improved condensing efficiency and conversion light rate without reducing condensing efficiency.

<Embodiment 6>
Based on FIG. 6A thru | or FIG. 6E, the solar cell manufacturing method which concerns on this Embodiment is demonstrated. Since the basic configuration of the solar cell according to the present embodiment is the same as in the case of Embodiments 1 to 5, the reference numerals are appropriately used to mainly describe different matters.

  FIG. 6A is a process diagram illustrating a substrate preparation process for preparing a receiver substrate on which a solar cell is placed in the solar cell manufacturing method according to Embodiment 6 of the present invention.

  FIG. 6B is a process diagram showing a resin stopper forming step of forming an inner resin stopper and an outer resin stopper in the solar cell manufacturing method according to Embodiment 6 of the present invention.

  FIG. 6C is a process diagram illustrating a support fixing process for fixing the support of the holding unit to the receiver substrate in the solar cell manufacturing method according to Embodiment 6 of the present invention.

  FIG. 6D is a process diagram showing a translucent resin injecting step of injecting a translucent resin into the inner resin stopper in the solar cell manufacturing method according to Embodiment 6 of the present invention.

  FIG. 6E is a process chart showing a columnar optical member mounting step in which the columnar optical member is brought into contact with the holding portion and the irradiation surface is mounted on the translucent resin in the solar cell manufacturing method according to Embodiment 6 of the present invention. It is.

  The solar cell manufacturing method according to the present embodiment includes a solar cell element 11 that photoelectrically converts sunlight Ls collected by the condensing lens 50, a receiver substrate 20 on which the solar cell element 11 is placed, and a condensing light. A columnar optical member 30 having an incident surface 31 on which the incident sunlight Ls is incident and an irradiation surface 32 that is disposed to face the solar cell element 11 and that irradiates the solar cell element 11 with the sunlight Ls; A holding unit erected on the receiver substrate 20 having a frame-shaped contact frame body 41 that is in contact with the side surface 33 and a support body 42 that is disposed apart from the columnar optical member 30 and supports the contact frame body 41. The solar cell 10 provided with the part 40 is manufactured.

  Moreover, the solar cell manufacturing method according to the present embodiment includes a substrate preparation process, a resin stopper forming process, a support fixing process, a translucent resin injection process, a columnar optical member mounting process, and a resin sealing part forming process. Prepare.

  First, the receiver board | substrate 20 which mounted the solar cell element 11 is prepared (board | substrate preparation process. FIG. 6A).

  Next, an adhesive resin is applied to the receiver substrate 20, and a support 42 is disposed outside the inner resin stopper 21 and the inner resin stopper 21 into which a translucent resin for sealing the solar cell element 11 is injected. The outer resin stopper 22 to be fixed is formed (resin stopper forming step; FIG. 6B).

  The inner resin stopper 21 is formed in a ring shape (frame shape) around the solar cell element 11 because a translucent resin for resin-sealing the solar cell element 11 is injected in a later step. Further, the outer resin stopper 22 is formed only at a position corresponding to the support 42 because the support 42 is bonded and fixed in a later step.

  The outer resin stopper 22 is formed in a ring shape (frame shape) around the inner resin stopper 21, and the translucent resin injected into the inner resin stopper 21 expands more than necessary from the inner resin stopper 21. It is also possible to adopt a form that prevents this. Further, when the outer resin stopper 22 is annular, an effect of blocking moisture that enters along the surface of the receiver substrate 20 is produced.

  The support 42 is fixed to the receiver substrate 20 by bonding the support 42 to the outer resin stopper 22 and curing the adhesive resin (support fixing process; FIG. 6C). The outer resin stopper 22 can be cured by performing a heat treatment at a temperature at which the adhesive resin forming the outer resin stopper 22 is cured. In addition, hardening with respect to the inner side resin stopper part 21 is also given together with hardening with respect to the outer side resin stopper part 22. FIG.

  A translucent resin is injected inside the inner resin stopper 21 (translucent resin injection step; FIG. 6D). As the translucent resin, as described above, an epoxy resin, a silicone resin, or the like can be applied.

  After injecting the translucent resin inside the inner resin stopper 21, the columnar optical member 30 is brought into contact with the abutting frame body 41 to place the irradiation surface 32 on the translucent resin (columnar optical member mounting). Process, FIG. 6E).

  The translucent resin is cured to form the resin sealing portion 25 (resin sealing portion forming step, not shown). By heating the translucent resin to an appropriate temperature, it is possible to perform a defoaming treatment simultaneously with curing, and the resin sealing portion 25 having excellent translucency can be formed.

  Since the irradiation surface 32 is placed on and brought into contact with the translucent resin, the irradiation surface 32 is adhered by the translucent resin of the resin sealing portion 25, and the columnar optical member 30 is securely attached to the solar cell element 11. And it is fixed with high precision. In addition, it is possible to secure further mechanical strength by injecting adhesive resin into the groove 41g and bonding and fixing the columnar optical member 30 and the holding portion 40 with the groove 41g.

  When the concentrated sunlight Ls (collected light beam region FLR) is misaligned with respect to the center of the columnar optical member 30 by the solar cell manufacturing method according to the present embodiment, the incident surface collected light beam region FLRd is incident. It is located in the area of the surface 31 to prevent fluctuations in the light collection characteristics, and the heat applied to the columnar optical member 30 by the concentrated sunlight Ls is dispersed by the contact frame 41, so that the light collection efficiency and The solar cell 10 having high heat resistance and high reliability with improved photoelectric conversion efficiency can be manufactured with high productivity (that is, easily and with high accuracy) and at low cost.

It is a see-through | perspective side view which shows roughly the schematic structure in the surface containing the optical axis of the solar cell which concerns on Embodiment 1 of this invention, and a concentrating solar power generation module. It is a perspective view which shows the external appearance of the holding | maintenance part and columnar optical member of the solar cell which were shown to FIG. 1A from diagonally upward. It is a side view which shows notionally the characteristic with respect to the sunlight wavelength of the solar cell which concerns on Embodiment 2 of this invention, and a concentrating solar power generation module. It is a side view which shows notionally the displacement state of the focus with respect to the sunlight wavelength by the temperature characteristic of the condensing lens in the solar cell which concerns on Embodiment 3 of this invention, and a concentrating solar power generation module. It is a top view which shows notionally the displacement state of the entrance plane condensing light beam area | region in the entrance plane of the solar cell shown to FIG. 3A. FIG. 6 is a tracking state conceptual diagram conceptually showing a relationship between a tracking state when the concentrating photovoltaic power generation module according to Embodiment 4 of the present invention is subjected to intermittent tracking control and an incident surface collecting light flux region formed on the incident surface. Yes, (A) shows a state in which the concentrating solar power generation module faces the sunlight, and (B) shows a state in which the concentrating solar power generation module is moved in advance with respect to the sunlight. , (C) shows the state where the moved concentrating solar power generation module faces again due to the movement of sunlight, and (D) shows the state where the concentrating solar power generation module is delayed due to the movement of sunlight. Respectively. The set angle deviation when an assembly error occurs between the condensing lens and the solar cell of the concentrating solar power generation module according to Embodiment 5 of the present invention, and the incident surface collecting light flux region formed on the incident surface It is explanatory drawing which illustrates notionally the relationship. It is process drawing which shows the board | substrate preparation process which prepares the receiver board | substrate which mounted the solar cell with the solar cell manufacturing method which concerns on Embodiment 6 of this invention. It is process drawing which shows the resin stopper part formation process which forms an inner side resin stopper part and an outer side resin stopper part with the solar cell manufacturing method which concerns on Embodiment 6 of this invention. It is process drawing which shows the support body fixing process which fixes the support body of a holding | maintenance part to a receiver board | substrate with the solar cell manufacturing method which concerns on Embodiment 6 of this invention. It is process drawing which shows the translucent resin injection | pouring process which inject | pours translucent resin inside an inner side resin stopper part with the solar cell manufacturing method which concerns on Embodiment 6 of this invention. It is process drawing which shows the columnar optical member mounting process which makes a columnar optical member contact | abut to a holding | maintenance part and mounts an irradiation surface on translucent resin with the solar cell manufacturing method which concerns on Embodiment 6 of this invention. It is sectional drawing which shows the structural example of the concentrating solar power generation module applied to the conventional tracking concentrating solar power generation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Condensing type solar power generation module 5 Tracking control part 10 Solar cell 11 Solar cell element 20 Receiver board | substrate 21 Inner resin stopper part 22 Outer resin stopper part 25 Resin sealing part 30 Columnar optical member 31 Incident surface 32 Irradiation surface 33 Side surface 40 Holding part 41 Contact frame 41b Bottom 41g Groove part 42 Support 50 Condensing lens FLR Focusing light area FLRb Middle and short wavelength side light collection area FLRc Long wavelength side light collection area FLRcs Outer side area FLRd Incident surface collection light area FLRs Minimum collection Light flux area FLR (T1) Light flux collection area (temperature T1)
FLR (T2) Light collecting area (temperature T2)
FLR (T3) Light collecting area (temperature T3)
FLRd (T1) Incident surface concentrated light flux region (temperature T1)
FLRd (T2) Incident surface collecting light flux region (temperature T2)
FLRd (T3) Incident surface collecting light flux region (temperature T3)
FP focus FPg focus group FP (T1) focus (temperature T1)
FP (T2) Focus (temperature T2)
FP (T3) Focus (temperature T3)
Lax Optical axis Ls Sunlight Sfp Focus shift SSD Solar movement direction t Thickness α Setting angle shift θ Tilt angle (tilt of side surface 33)

Claims (11)

A solar cell element that photoelectrically converts sunlight collected by the condenser lens, a receiver substrate on which the solar cell element is mounted, an incident surface on which the collected sunlight is incident, and the solar cell element A columnar optical member having an irradiation surface for irradiating sunlight to the solar cell element, and a holding unit that is erected on the receiver substrate and holds the columnar optical member,
The holding portion is disposed apart from the columnar optical member, and a frame-shaped abutting frame body that is in contact with a side surface of the columnar optical member and has a thickness from the incident surface toward the irradiation surface. A support for supporting the contact frame,
The side surface is inclined so as to totally reflect incident sunlight in the direction of the irradiated surface,
The solar cell according to claim 1, wherein the incident surface has a size such that a collected light flux region formed by the condensed sunlight is positioned inside an incident surface collected light flux region formed on the incident surface. The solar cell according to claim 1,
The side surface has an inclination angle of 8 degrees to 20 degrees with respect to a direction perpendicular to the irradiation surface. The solar cell according to claim 1 or 2, wherein
The said irradiation surface is set as the magnitude | size located inside the said solar cell element. The solar cell characterized by the above-mentioned. It is a solar cell as described in any one of Claims 1-3,
The said contact frame is made into the rectangular shape, The said support body is arrange | positioned at four corners of the said contact frame in the column shape. The solar cell characterized by the above-mentioned. A concentrating solar power generation module comprising a condensing lens that collects sunlight and enters the solar cell, and a solar cell that photoelectrically converts the sunlight collected by the condensing lens,
The said solar cell is a solar cell as described in any one of Claims 1-4. The concentrating solar power generation module characterized by the above-mentioned. The concentrating solar power generation module according to claim 5,
The concentrating solar power generation module is configured such that the minimum light collection region where the light collection region is minimum is positioned inside the columnar optical member. The concentrating solar power generation module according to claim 5 or 6,
The concentrating solar power generation module is characterized in that the thickness of the abutting frame is a thickness that shields an outer peripheral side region of a long-wavelength side concentrated light flux region formed by long-wavelength side sunlight. The concentrating solar power generation module according to claim 7,
The concentrating solar power generation module, wherein the minimum light collection region is located between a bottom portion of the contact frame and the irradiation surface. The concentrating solar power generation module according to claim 8,
The focus group formed by the focus of the condenser lens that is displaced according to the temperature change of the condenser lens is configured to be positioned between the bottom and the irradiation surface. Power generation module. The concentrating solar power generation module according to any one of claims 5 to 9,
When the intermittent tracking control mode in which the position of the solar cell is moved in advance to the destination of the sun on the solar orbit every specified time,
The concentrating solar power generation module is characterized in that the incident surface collecting light flux region is located inside the incident surface. A solar cell element that photoelectrically converts sunlight collected by the condenser lens, a receiver substrate on which the solar cell element is mounted, an incident surface on which the collected sunlight is incident, and the solar cell element And a columnar optical member having an irradiation surface for irradiating the solar cell element with sunlight, a frame-shaped contact frame that is in contact with a side surface of the columnar optical member, and the columnar optical member. A solar cell manufacturing method for manufacturing a solar cell comprising a support body that is disposed and supports the abutting frame body, and a holding portion that is erected on the receiver substrate,
A substrate preparation step of preparing the receiver substrate on which the solar cell element is placed;
An adhesive resin is applied to the receiver substrate, and an inner resin stopper that is injected with a translucent resin that seals the solar cell element, and an outer side where the support is fixed outside the inner resin stopper. A resin stopper forming step for forming the resin stopper;
A support fixing step for fixing the support to the receiver substrate by bonding the support to the outer resin stopper and curing the adhesive resin;
A translucent resin injection step of injecting the translucent resin inside the inner resin stopper,
A columnar optical member mounting step of contacting the columnar optical member with the contact frame and mounting the irradiation surface on the translucent resin;
A method for producing a solar cell, comprising: a resin sealing portion forming step of curing the translucent resin to form a resin sealing portion.

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