Solar cell module and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10784392-B2
Application number	US-201916358439-A
Country	US
Kind code	B2
Filing date	Mar 19, 2019
Priority date	Sep 28, 2016
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

A solar cell module includes: a solar cell having a front surface and a back surface; a front surface side encapsulant disposed on a front surface side of the solar cell, the front surface side encapsulant including a transparent resin sheet; a light reflector protruding from an end portion of the solar cell, the light reflector including a light reflection layer that reflects incident light, and a substrate layer that is disposed on the light reflection layer on a light incident side; and an ultraviolet absorber disposed closer to the light incident side than the light reflection layer, the light incident side being a back surface side of the front surface side encapsulant.

First claim

What is claimed is:

1. A solar cell module, comprising:
a solar cell having a front surface and a back surface;
a front surface side encapsulant disposed on a front surface side of the solar cell, the front surface side encapsulant including a transparent resin sheet;
a light reflector protruding from an end portion of the solar cell, the light reflector including a light reflection layer that reflects incident light, and a substrate layer that is disposed on the light reflection layer on a light incident side, the light incident side being a back surface side of the front surface side encapsulant;
a first ultraviolet absorber disposed closer to the light incident side than the light reflection layer; and
a first ultraviolet absorbing layer disposed between the front surface side encapsulant and the substrate layer wherein:
the first ultraviolet absorbing layer bonds the light reflector to the end portion of the solar cell and includes the first ultraviolet absorber, and
a transmittance for light having a wavelength of 360 nm in the first ultraviolet absorbing layer is at least 0.02 times and at most 0.5 times a transmittance for the light having the wavelength of 360 nm in the substrate layer.

2. The solar cell module according to claim 1 ,
wherein the substrate layer includes a second ultraviolet absorber.

3. The solar cell module according to claim 1 , further comprising:
a plurality of solar cells; and
a second ultraviolet absorbing layer covering a space between two adjacent solar cells, the second ultraviolet absorbing layer including a second ultraviolet absorber.

4. The solar cell module according to claim 1 ,
wherein the light reflector is disposed on a back surface side of the solar cell.

5. A solar cell module, comprising:
a solar cell having a front surface and a back surface;
a front surface side encapsulant disposed on a front surface side of the solar cell, the front surface side encapsulant including a transparent resin sheet;
a light reflector protruding from an end portion of the solar cell, the light reflector including a light reflection layer that reflects incident light, and a substrate layer that is disposed on the light reflection layer on a light incident side, the light incident side being a back surface side of the front surface side encapsulant;
a first ultraviolet absorber disposed closer to the light incident side than the light reflection layer; and
a first ultraviolet absorbing layer disposed between the front surface side encapsulant and the substrate layer wherein:
the first ultraviolet absorbing layer bonds the light reflector to the end portion of the solar cell,
the front surface side encapsulant includes the first ultraviolet absorber, and
a transmittance for light having a wavelength of 360 nm in the first ultraviolet absorbing layer is at most 1.2 times a transmittance for the light having the wavelength of 360 nm in the front surface side encapsulant.

6. The solar cell module according to claim 1 ,
wherein the first ultraviolet absorber is a high-molecular-weight ultraviolet absorber having a molecular weight of more than 1000.

7. The solar cell module according to claim 5 ,
wherein the substrate layer includes a second ultraviolet absorber.

8. The solar cell module according to claim 5 , further comprising:
a plurality of solar cells; and
a second ultraviolet absorbing layer covering a space between two adjacent solar cells, the second ultraviolet absorbing layer including a second ultraviolet absorber.

9. The solar cell module according to claim 5 ,
wherein the light reflector is disposed on a back surface side of the solar cell.

10. The solar cell module according to claim 5 ,
wherein the first ultraviolet absorber is a high-molecular-weight ultraviolet absorber having a molecular weight of more than 1000.

11. The solar cell module according to claim 2 , wherein the second ultraviolet absorber is a high-molecular-weight ultraviolet absorber having a molecular weight of more than 1000.

12. The solar cell module according to claim 3 , wherein the second ultraviolet absorber is a high-molecular-weight ultraviolet absorber having a molecular weight of more than 1000.

13. The solar cell module according to claim 7 , wherein the second ultraviolet absorber is a high-molecular-weight ultraviolet absorber having a molecular weight of more than 1000.

14. The solar cell module according to claim 8 , wherein the second ultraviolet absorber is a high-molecular-weight ultraviolet absorber having a molecular weight of more than 1000.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Maekawa Akimichi
• Murakami Youhei
• Hashimoto Haruhisa
• Irikawa Junpei

Classifications

• Y02E10/52

  PV systems with concentrators · CPC title

• H10F77/488

  Reflecting light-concentrating means, e.g. parabolic mirrors or concentrators using total internal reflection · CPC title

• H10F77/211

  for photovoltaic cells · CPC title

• H10F77/122

  comprising only Group IV materials · CPC title

• H10F77/42

  directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means · CPC title