CN205621752U - Photovoltaic module and photovoltaic system - Google Patents

Abstract

The utility model discloses a photovoltaic module, including polylith battery piece and interconnection bar, the polylith the battery piece passes through interconnection bar end -to -end connection forms the battery cluster, and is a plurality of the battery cluster is in with the setting the busbar parallel connection at battery cluster both ends. Besides, the utility model also discloses a photovoltaic system, includes a plurality ofly if above -mentioned photovoltaic module, a plurality of the photovoltaic module series connection. Because it is a plurality of battery cluster and busbar parallel connection are compared with series connection between a plurality of batteries cluster among the prior art, have reduced the welding of busbar, have improved the production efficiency of subassembly.

Description

A kind of photovoltaic component and photovoltaic system

technical field

The utility model relates to the field of photovoltaic component manufacturing, in particular to a photovoltaic component and a photovoltaic system.

Background technique

Solar energy is a clean energy, and the working principle of photovoltaic modules is to directly convert solar energy into electrical energy. Crystalline silicon photovoltaic modules are generally laminated and packaged in the order of front tempered glass, front adhesive film layer, battery sheet layer, rear adhesive film layer, back plate or rear tempered glass, and a metal frame is installed around the module to facilitate assembly. Installation and fixing. Good packaging can make photovoltaic cells work continuously, efficiently and stably for a long time.

In the existing conventional component design, each component must be a complete unit, and each unit needs a separate junction box to lead out the positive and negative poles of the component circuit as terminals in series with other components; A battery string also needs to be connected in series with each other. The component circuits designed in this way are tortuous and complicated, and a bus bar welding process is required in the component production process, resulting in low production efficiency.

In addition, when a component or photovoltaic system is working, the current is tortuous, and the path it passes through is longer. The longer the path, the more work the current does in the circuit, that is, the greater the electrical loss, which reduces the component or system. Power output, that is, lowering the power generation efficiency of the components.

The module is equipped with a frame, and the frame is thicker, which makes the size of the module thicker. During the packaging and transportation of the module, a single module takes up a lot of space, the number of modules packaged and transported is limited, and the overall transportation cost is high.

On the photovoltaic system side, the installation of modules generally includes clip installation and screw installation. The method is to fix the frame of the module on the mounting bracket with clips or screws, and then connect the modules in series with each other through cables. Both of the above two installation methods require more precise alignment control of the mounting apertures or clips on the frame and the bracket, but the control is more difficult, which increases the difficulty of component installation and lowers the installation efficiency.

Utility model content

The purpose of the utility model is to provide a photovoltaic module and a photovoltaic system, which can reduce bus bar welding and improve the production efficiency of the module.

In order to solve the above-mentioned technical problems, the embodiment of the utility model provides a photovoltaic module, including a plurality of battery slices and interconnection strips, and a plurality of battery slices are connected end-to-end through the interconnection strips to form a battery string, and a plurality of the battery strings It is connected in parallel with the bus bars arranged at both ends of the battery string.

Wherein, it also includes a junction box arranged on the back plate and correspondingly connected to the bus bars at both ends of the battery string, and the lead-out wires of the junction box are used as terminals of the photovoltaic module.

Wherein, the junction box is connected to the corresponding bus bar through a through hole provided under the bus bar.

Wherein, a frame disposed on the outer periphery of the laminated battery string is also included.

Wherein, the junction box leads outward through the frame through hole or the frame through groove provided in the frame.

A photovoltaic system includes a plurality of photovoltaic components as described above, and the plurality of photovoltaic components are connected in series.

Wherein, a plurality of said photovoltaic modules are connected in series through separate cables.

Compared with the prior art, the photovoltaic module and the photovoltaic system provided by the embodiment of the utility model have the following advantages:

The photovoltaic module provided by the embodiment of the present invention includes a plurality of battery slices and interconnection strips. The plurality of battery slices are connected end-to-end through the interconnection strips to form a battery string. The bus bars at the ends are connected in parallel.

The photovoltaic system provided by the embodiment of the present invention includes a plurality of photovoltaic modules as described above, and the plurality of photovoltaic modules are connected in series.

For the photovoltaic module and the photovoltaic system, since a plurality of the battery strings are connected in parallel with the bus bars, the battery slices in the module are first connected in series in parallel, and the current is collected at the head and tail of the module respectively, reducing the The welding of bus bars improves the production efficiency of components. Due to the change of the circuit design, the circuit is simplified, the stacking of the components reduces the bus bar welding, and the production efficiency of the components is improved. In the photovoltaic system, it is only necessary to connect the modules at the end, which saves installation cables and reduces the cost of module installation; Power loss increases the power generation of modules; the voltage of a single module becomes lower, and the number of modules that can be connected in series increases under the same system voltage, which also simplifies system installation and improves system installation and control efficiency.

To sum up, the photovoltaic modules and photovoltaic systems provided by the embodiments of the utility model reduce the welding of bus bars by connecting the cells in the modules in series and then in parallel, improve the production efficiency of the modules, and reduce the production cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present utility model. Those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is a schematic diagram of the cell layout structure of a specific embodiment of the photovoltaic module provided by the embodiment of the present invention;

Fig. 2 is a schematic diagram of the rear structure of a specific embodiment of the photovoltaic module provided by the embodiment of the present invention.

detailed description

As mentioned in the background technology section, bus bars are used to connect battery strings in existing photovoltaic modules, and there are junction boxes outside the module to lead out the positive and negative leads, which makes the circuit in the module tortuous and complicated. The welding process of the bus bar has low production efficiency.

In addition, when the components are working in the photovoltaic system, the current is tortuous, and the path it passes is longer. The longer the path, the more work the current does in the circuit, that is, the greater the electrical loss, which reduces the component or system. Power output, that is, lowering the power generation efficiency of the components.

The module is equipped with a frame, and the frame is thicker, which makes the size of the module thicker. During the packaging and transportation of the module, a single module takes up a lot of space, the number of modules packaged and transported is limited, and the overall transportation cost is high.

On the photovoltaic system side, the installation of modules generally includes clip installation and screw installation. The method is to fix the frame of the module on the mounting bracket with clips or screws, and then connect the modules in series with each other through cables. Both of the above two installation methods require more precise alignment control of the mounting apertures or clips on the frame and the bracket, but the control is more difficult, which increases the difficulty of component installation and lowers the installation efficiency.

Based on this, the embodiment of the utility model provides a photovoltaic module, which includes a plurality of battery slices and interconnection strips, and a plurality of battery slices are connected end-to-end through the interconnection strips to form a battery string. The bus bars at both ends of the battery strings are connected in parallel.

In addition, the embodiment of the present utility model also provides a photovoltaic system, which includes a plurality of photovoltaic modules as described above, and the plurality of photovoltaic modules are connected in series.

To sum up, in the photovoltaic modules and photovoltaic systems provided by the embodiments of the present utility model, since a plurality of battery strings are connected in parallel with the bus bars, the battery slices in the modules are connected in series and in parallel first, respectively at the head of the module. And the tail will gather the current, which reduces the welding of bus bars and improves the production efficiency of components. Due to the change of circuit design, the circuit is simplified, and the stacking of components reduces the welding of bus bars and improves the production efficiency of components. In the photovoltaic system, it is only necessary to connect the modules at the end, which saves installation cables and reduces the cost of module installation; Power loss increases the power generation of modules; the voltage of a single module becomes lower, and the number of modules that can be connected in series increases under the same system voltage, which also simplifies system installation and improves system installation and control efficiency.

In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings.

In the following description, specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar extensions without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific implementations disclosed below.

Please refer to Figure 1-2, Figure 1 is a schematic diagram of the cell layout structure of a specific implementation of the photovoltaic module provided by the embodiment of the utility model; Figure 2 is a specific implementation of the photovoltaic module provided by the embodiment of the utility model Schematic diagram of the back structure.

In a specific embodiment, the photovoltaic module includes a plurality of battery slices 10 and interconnection bars 20, and a plurality of battery slices 10 are connected end-to-end through the interconnection bars 20 to form a battery string, and a plurality of the battery strings It is connected in parallel with the bus bars 30 provided at both ends of the battery string.

Since a plurality of battery strings are connected in parallel with the bus bar 30, the battery slices 10 in the assembly are first connected in series in parallel, and the current is collected at the head and tail of the assembly respectively, which reduces the welding of the bus bar 30 and improves the efficiency. As for the production efficiency of components, due to the change of circuit design, the circuit is simplified, the stacking of components reduces the welding of bus bars 30, and the production efficiency of components is improved.

In a photovoltaic module, the current output by the bus bar 30 is generally output from the junction box 50 to facilitate connection with the module, so it also includes a junction box 50 arranged on the back plate and correspondingly connected to the bus bars 30 at both ends of the battery string. The lead wires of the junction box 50 serve as terminals of the photovoltaic module.

Wherein, the junction box 50 is connected to the corresponding bus bar 30 through a through hole provided under the bus bar 30 .

It should be noted that the present invention does not specifically limit the specific position of the junction box 50 on the back of the photovoltaic module and the connection method with the backboard of the photovoltaic module.

The manufactured main body of the component generally has poor mechanical properties, and its mechanical properties need to be strengthened. Generally, it also includes a frame 40 disposed on the outer periphery of the laminated battery string. In addition, it is also possible to place the main body of the component in the installation frame and lead wires outward from the side of the installation frame, which is not specifically limited in the present invention.

Wherein, the junction box 50 leads the wires outward through the through hole or through groove of the frame 40 provided on the frame 40 .

In addition, the utility model also provides a photovoltaic system, which includes a plurality of photovoltaic modules as described above, and the plurality of photovoltaic modules are connected in series.

Under the condition that the area of the assembly is the same as that of the assembly of the prior art, since the battery strings in the utility model are connected in parallel with each other, while the battery strings in the prior art are connected in series, the output of the assembly The voltage becomes lower. Under the same system voltage, the number of photovoltaic modules that can be connected in series in the embodiment of the utility model increases. From this aspect, the system installation can also be simplified, and the system installation and control efficiency can be improved.

Since the output voltage provided by a single photovoltaic module is limited, which is only equivalent to the output voltage of a battery string, it is necessary to increase the overall output voltage by connecting multiple photovoltaic modules in series.

Sometimes, because the leads of the photovoltaic modules are not long enough, multiple photovoltaic modules are connected in series through separate cables.

To sum up, for the back film of the module and the photovoltaic module provided by the embodiment of the utility model, since a plurality of the battery strings are connected in parallel with the bus bars, the battery slices in the module are first connected in series in parallel, respectively at the head of the module The head and the tail gather the current, reducing the welding of bus bars and improving the production efficiency of components. Due to the change of circuit design, the circuit is simplified, and the stacking of components reduces the welding of bus bars and improves the production efficiency of components. In the photovoltaic system, it is only necessary to connect the modules at the end, which saves installation cables and reduces the cost of module installation; Power loss increases the power generation of modules; the voltage of a single module becomes lower, and the number of modules that can be connected in series increases under the same system voltage, which also simplifies system installation and improves system installation and control efficiency.

The photovoltaic module and the photovoltaic system provided by the utility model have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (7)

1. a photovoltaic module, it is characterised in that include polylith cell piece and interconnecting strip is many Cell piece described in block connects formation battery strings, multiple described battery strings by described interconnecting strip head and the tail It is connected in parallel with the busbar being arranged on described battery strings two ends.

2. photovoltaic module as claimed in claim 1, it is characterised in that also include being arranged on The rosette of connection corresponding with the busbar at described battery strings two ends on backboard, described rosette Lead-out wire is as the terminal of described photovoltaic module.

3. photovoltaic module as claimed in claim 2, it is characterised in that described rosette is led to Cross and be arranged on the through hole under described busbar and the connection of corresponding busbar.

4. photovoltaic module as claimed in claim 3, it is characterised in that also include being arranged on Frame through the described battery strings periphery of lamination.

5. photovoltaic module as claimed in claim 4, it is characterised in that described rosette is led to Cross and be arranged on the frame through hole of described frame or frame groove to outer lead.

6. a photovoltaic system, including multiple photovoltaic groups as described in any one of claim 1-5 Part, multiple described photovoltaic modulies are connected in series.

7. photovoltaic system as claimed in claim 6, it is characterised in that multiple described photovoltaics Assembly is connected in series by separate type cable.