KR-20260068016-A - Hotspot Effect Improvemented Solar Cell Module

Abstract

A solar cell module with improved hotspot effect is provided. The modules may include a solar cell module in which the cells within the module are redesigned from a conventional series configuration to a parallel configuration to allow current to be diverted from the solar cell module even in irregular shading, thereby improving the hotspot effect, enhancing durability and efficiency, and reducing manufacturing costs.

Inventors

• 장남철

Assignees

• 장남철

Dates

Publication Date

20260513

Application Date

20251106

Priority Date

20241106

Claims (6)

1. A solar cell array in which multiple solar cells are arranged in rows and columns; A switching unit that blocks a row containing the shaded solar cell when shading occurs in the solar cell array; and A solar cell module comprising an energy storage unit that stores energy generated from the above solar cell array.
2. In Article 1, The above switching unit comprises at least one of a MOSFET, a BJT, a relay circuit, an IGBT, a JFET, or an SSR, in a solar cell module.
3. In Article 1, The above solar cell array comprises a first row to an nth row including a plurality of the above solar cell cells, and The switching unit comprises at least a first switch to an nth switch that controls whether the first row to the nth row is blocked, respectively. A solar cell module including n being a natural number greater than or equal to 2.
4. In Paragraph 3, The above switching unit is a solar cell module comprising a first switching module and a second switching module.
5. In Article 1, The above solar cell array comprises a first row to a second row including a plurality of the above solar cell cells, and The positive electrodes of the plurality of solar cells included in the first row are electrically connected to a first node, and The negative electrodes of the plurality of solar cells included in the first row are electrically connected to a second node, and The positive electrodes of the plurality of solar cell cells included in the second row are electrically connected to the second node, and A solar cell module comprising a plurality of negative electrodes of the solar cell included in the second row above being electrically connected to the third node.
6. In Article 1, The above switching unit comprises a first-1 switch for controlling whether there is an electrical connection between the first node and the second node, and a first-2 switch for controlling whether there is an electrical connection between the second node and the third node, in a solar cell module.

Description

Hotspot Effect Improvemented Solar Cell Module The present application relates to a solar cell module with improved hotspot effects, and more specifically, to a solar cell module in which the cells within the module are redesigned from a conventional series configuration to a parallel configuration so that current can be diverted from the solar cell module even in irregular shading. Generally, the hotspot effect refers to a phenomenon where shading of a specific cell causes it to operate in a reverse bias state, becoming a heat source instead of generating power, which damages the cell and degrades its performance. The hotspot effect can have a fatal impact on solar cells. Meanwhile, the hotspot effect is considered one of the key criteria when discussing the efficiency and durability of solar panels. According to statistics, severe hotspot effects reduce the expected lifespan of solar cell modules by at least 30%. In particular, residential solar panels are surrounded by various factors that induce the hotspot effect, such as artificial lighting including streetlights around the house and partial shading caused by leaves. However, conventional residential solar cells had the problem of being difficult to control the hotspot effect compared to solar power plants. Additionally, there was a problem where efficiency did not decrease by the same amount as the shaded cells when shading occurred in series. Accordingly, the present invention is designed to better control the hotspot effect by taking into account the specific characteristics of the installation location of the residential solar cell. In addition, the efficiency of the solar cell module can be improved while using a minimum number of diodes compared to conventional modules. FIGS. 1 and FIGS. 2 are drawings for explaining a solar cell module according to an embodiment of the present application. FIG. 3 is a drawing illustrating a case where shading occurs in a solar cell included in the fifth row of a solar cell module according to an embodiment of the present application. FIG. 4 is a drawing illustrating a case where shading occurs in the solar cell included in the fourth and fifth rows of a solar cell module according to an embodiment of the present application. FIG. 5 is an equivalent circuit diagram of a solar cell included in a solar cell module according to an embodiment of the present application. FIG. 6 is a diagram illustrating the power generation amount (simulation result) of a solar cell operating normally as an example of an equivalent circuit diagram of a solar cell included in a solar cell module according to an embodiment of the present application. FIG. 7 is a diagram illustrating an example of an equivalent circuit diagram of a solar cell included in a solar cell module according to an embodiment of the present application, and is intended to explain the amount of power generated (simulation result) of a solar cell operating abnormally due to shading. FIG. 8 is a drawing for explaining a solar cell module according to the first-1 embodiment of the present application. FIG. 9 is an example of an equivalent circuit diagram of a solar cell module according to the first-1 embodiment of the present application. FIG. 10 is a drawing for explaining a solar cell module according to the first-2 embodiment of the present application. FIG. 11 is an example of an equivalent circuit diagram of a solar cell module according to the first-2 embodiment of the present application. FIG. 12 is a drawing for explaining a solar cell module according to the 2-1 embodiment of the present application. FIG. 13 is an example of an equivalent circuit diagram of a solar cell module according to the 2-2 embodiment of the present application. FIG. 14 is a drawing for explaining a solar cell module according to the 2-2 embodiment of the present application. FIG. 15 is an example of an equivalent circuit diagram of a solar cell module according to the 2-2 embodiment of the present application. FIG. 16 is a drawing for explaining a solar cell module according to the 3-1 embodiment of the present application. FIG. 17 is an example of an equivalent circuit diagram of a solar cell module according to the 3-2 embodiment of the present application. FIG. 18 is a drawing for explaining a solar cell module according to the 3-2 embodiment of the present application. FIG. 19 is an example of an equivalent circuit diagram of a solar cell module according to the 3-2 embodiment of the present application. FIGS. 20 to 22 are drawings for explaining the simulation results of a solar cell module according to an embodiment of the present application. FIG. 23 is a diagram illustrating the case where shading occurs in the fifth row of the equivalent circuit diagram of a solar cell module according to the first-1 embodiment of the present application. FIGS. 24 and 25 are drawings for explaining the case where shading occurs in the third row of the equivalent circuit diagram of a solar