CN110212050A - Novel structure photovoltaic cell subassembly - Google Patents

Abstract

The invention discloses a photovoltaic cell assembly with a novel structure. The photovoltaic assembly includes a plurality of battery string units connected in series, the battery string unit includes three parallel battery strings, and the battery string includes a plurality of battery cells connected in series. , a junction box with a bypass diode is connected in parallel between two adjacent series-connected parallel battery string units. The cell sheets are cut half cell sheets. The invention obtains a battery string unit by connecting three battery strings in parallel, and then connects the battery string units in series, thereby reducing the voltage of the components to 2/3 of the original, so that the number of components in the same string can be increased by 50% when the power station is installed. The number of combiner boxes can be reduced by 1/3 accordingly. For example, if there are 12 strings of batteries, the number of junction boxes of the module is also reduced from the original three to two, which can save the cost of junction boxes and combiner boxes. At the same time, 1/2 of the number of components can be connected in series in the same array, which can reduce the number of combiner boxes by 1/3.

Description

A new structure photovoltaic cell module

technical field

The invention belongs to the field of photovoltaic technology, and in particular relates to a photovoltaic cell assembly with a novel structure.

Background technique

A solar cell is a device that uses the photovoltaic effect to directly convert light energy into direct current. According to different photoelectric conversion materials, solar cells include monocrystalline silicon, polycrystalline silicon, amorphous silicon thin film, cadmium telluride thin film, copper indium gallium tin thin film, gallium arsenide, fuel sensitization, perovskite, stack and other types . The most common of these are crystalline silicon solar cells, including monocrystalline silicon solar cells and polycrystalline silicon solar cells. Photovoltaic devices that can be used for a long time are obtained by electrically interconnecting multiple solar cells and encapsulating them in glass or organic polymers, which are called photovoltaic modules. The interconnection of solar cells within the module includes series, parallel and a combination of the two.

In the prior art, the number of components in the same string of photovoltaic arrays in the photovoltaic array is limited by the open-circuit voltage of the components. In addition, the number of junction boxes and combiner boxes required is also large, which increases the production cost. For example, 3 diodes are usually required in parallel.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides a photovoltaic cell assembly with a novel structure, which reduces the number of combiner boxes and junction boxes when applied in power stations.

The technical scheme of the present invention is as follows: a photovoltaic cell assembly with a novel structure includes a plurality of battery string units connected in series, the battery string unit includes three parallel battery strings, and the battery string includes a plurality of battery sheets connected in series, A junction box with a bypass diode is connected in parallel between two adjacent series-connected battery string units.

Preferably, the cells are cut half cells.

Preferably, the number of the battery string units is even.

Preferably, there are four battery string units.

The present invention can be a double-glass module or a single-glass module.

Compared with the prior art, the beneficial effects of the present invention are embodied in:

The invention obtains a battery string unit by connecting three battery strings in parallel, and then connects the battery string units in series, thereby reducing the voltage of the component to 2/3 of the original, so that the number of components in the same string can be increased by 50% in the application of the power station. The number of combiner boxes can be reduced by 1/3 accordingly. For example, if there are 12 battery strings, the number of junction boxes of the module is also reduced from the original three to two, which can save the cost of junction boxes and combiner boxes. At the same time, 1/2 of the number of components can be connected in series in the same array, thereby reducing the number of combiner boxes by 1/3.

Description of drawings

FIG. 1 is a schematic diagram of a component circuit of the present invention.

FIG. 2 is a schematic view of the front structure of the present invention when it is a double-glass photovoltaic module.

FIG. 3 is a schematic diagram of the rear structure of the present invention when it is a double-glass photovoltaic module.

FIG. 4 is a schematic view of the front structure of the present invention when it is a single-glass photovoltaic module.

FIG. 5 is a schematic diagram of the rear structure of the present invention when it is a single-glass photovoltaic module.

Detailed ways

As shown in FIG. 2 and FIG. 3 , the present invention includes a photovoltaic module, a glass front plate and a back plate located on the front and rear sides of the photovoltaic module, and the back plate can also be a glass back plate, that is, the photovoltaic module in the present invention can be a double glass Photovoltaic modules, as shown in Figure 3, can also be single-glass photovoltaic modules, as shown in Figure 5.

As shown in FIG. 1 , the photovoltaic module in the present invention includes a plurality of battery string units 3 connected in series, the battery string unit 3 includes three battery strings 2 connected in parallel, and the battery string 2 includes a plurality of batteries connected in series Sheet 1, a junction box with a bypass diode 4 is connected in parallel between two adjacent series-connected battery string units 3.

Among them, the battery slices 1 can be cut half-cell slices, the number of battery slices in each string of battery strings can also be multiple, and the number of battery string units 3 can also be multiple. For example, as shown in FIG. 1 , in this embodiment There are 12 battery strings and 4 battery string units.

Claims (6)

1. a kind of new structure photovoltaic cell component, which is characterized in that including multiple concatenated battery string locations, the battery strings Unit includes 3 battery strings in parallel, and the battery strings include the cell piece of multiple series connections, two neighboring concatenated battery A terminal box with bypass diode in parallel between string location.

2. new structure photovoltaic cell component as described in claim 1, which is characterized in that the cell piece is to cut half-cell Piece.

3. new structure photovoltaic cell component as described in claim 1, which is characterized in that the battery string location is even number It is a.

4. new structure photovoltaic cell component as claimed in claim 3, which is characterized in that the battery string location is 2 or 4 It is a.

5. new structure photovoltaic cell component as described in claim 1, which is characterized in that the cell piece is with 3-18 root The cell piece of main grid.

6. the new structure photovoltaic cell component as described in Claims 1 to 5 is any, which is characterized in that the novel knot Structure photovoltaic cell component is single glass component or solar double-glass assemblies.