Solar cell panel

Abstract

A solar cell panel includes a first solar cell and a second solar cell; and a plurality of leads connecting the first solar cell and the second solar cell. Each of the first solar cell and the secondsolar cell includes: a first electrode including a plurality of finger lines in a first direction and a plurality of first bus bars in a second direction crossing the first direction; and a second electrode including a plurality of second bus bars in the second direction. The plurality of leads have a diameter or width of 100 to 500 [mu]m, and include 6 or more leads arranged at one surface side of the first or second solar cell. The plurality of leads are connected to the plurality of first bus bars of the first solar cell and the plurality of second bus bars of the second solar cell by a solder layer, respectively.

Description

technical field

[0001] Embodiments of the present invention relate to solar cell panels, and more particularly, to solar cell panels including solar cells electrically connected to each other. Background technique

[0002] Recently, as existing energy sources such as oil and coal are exhausted, interest in alternative energy sources has increased. In particular, solar cells have attracted attention as next-generation cells capable of converting solar energy into electrical energy.

[0003] A plurality of solar cells are connected in series or in parallel through a plurality of ribbons, and then encapsulated by an encapsulation process to protect them, thereby forming a solar panel.

[0004] Typically, solar cells are attached using tapes having a width of about 1.5 mm. Then, since the width of the tape is so large, a shading loss occurs. For this reason, the number of ribbons used for solar cells should be reduced. For example, the number of bands may be three. Therefor...

Examples

experiment example 1

[0151] The metal electrode layer is formed by applying a low-temperature paste and heat-treating it. Low-temperature pastes include metal particles, cross-linked resins, hardeners, and solvents. The metal particles include spherical particles having a size of 0.1 to 5 um and flake-shaped particles having a long width of 2 to 10 um and a thickness of 0.2 to 5 um. In this case, relative to 100% by weight of metal particles, 80% by weight of spherical particles is included and 20% by weight of flake-shaped particles is included. The crosslinking resin is an epoxy resin, the hardener is an amine hardener, and the solvent is butyl carbitol acetate. With respect to 100% by weight of the sum of the metal particles and the cross-linked resin, 80% by weight of the metal particles, 20% by weight of the cross-linked resin, 2% by weight of the hardener, and 10% by weight solvent.

[0152] The lead wires are attached on the metal electrode layer by a wiring process that applies heat and...

experiment example 2

[0154] The pull-out strength was measured by the same method as in Experimental Example 1, except that the lead wire including the second solder layer of SnBi instead of the first solder layer was attached by the wiring process.

experiment example 3

[0156] The pull-out strength was measured by the same method as in Experimental Example 1, except that the lead wires of the third solder layer including SnIn instead of the first solder layer were attached by wiring processing.

technical field

[0001] Embodiments of the present invention relate to solar cell panels, and more particularly, to solar cell panels including solar cells electrically connected to each other. Background technique

[0002] Recently, as existing energy sources such as oil and coal are exhausted, interest in alternative energy sources has increased. In particular, solar cells have attracted attention as next-generation cells capable of converting solar energy into electrical energy.

[0003] A plurality of solar cells are connected in series or in parallel through a plurality of ribbons, and then encapsulated by an encapsulation process to protect them, thereby forming a solar panel.

[0004] Typically, solar cells are attached using tapes having a width of about 1.5 mm. Then, since the width of the tape is so large, a shading loss occurs. For this reason, the number of ribbons used for solar cells should be reduced. For example, the number of bands may be three. Therefor...

Examples

experiment example 1

[0151] The metal electrode layer is formed by applying a low-temperature paste and heat-treating it. Low-temperature pastes include metal particles, cross-linked resins, hardeners, and solvents. The metal particles include spherical particles having a size of 0.1 to 5 um and flake-shaped particles having a long width of 2 to 10 um and a thickness of 0.2 to 5 um. In this case, relative to 100% by weight of metal particles, 80% by weight of spherical particles is included and 20% by weight of flake-shaped particles is included. The crosslinking resin is an epoxy resin, the hardener is an amine hardener, and the solvent is butyl carbitol acetate. With respect to 100% by weight of the sum of the metal particles and the cross-linked resin, 80% by weight of the metal particles, 20% by weight of the cross-linked resin, 2% by weight of the hardener, and 10% by weight solvent.

[0152] The lead wires are attached on the metal electrode layer by a wiring process that applies heat and...

experiment example 2

[0154] The pull-out strength was measured by the same method as in Experimental Example 1, except that the lead wire including the second solder layer of SnBi instead of the first solder layer was attached by the wiring process.

experiment example 3

[0156] The pull-out strength was measured by the same method as in Experimental Example 1, except that the lead wires of the third solder layer including SnIn instead of the first solder layer were attached by wiring processing.

Images