CN107275420A - A kind of half section photovoltaic module circuit and half section photovoltaic module - Google Patents

Abstract

The invention discloses a half-slice photovoltaic component circuit, wherein the half-slice photovoltaic component circuit includes multiple sets of battery string units, each adjacent two sets of battery string units are connected in series through a first bus bar, and each set of battery string units A diode is connected in parallel to both ends of the two ends respectively through the second bus bar. Each battery string unit includes two battery strings connected in parallel, and each battery string includes a plurality of batteries connected in series. The first battery string unit in multiple groups of battery string units The first end of the battery string unit in one group is formed as the positive pole of the half-slice photovoltaic module circuit, and the tail end of the last group of battery string units in multiple groups of the battery string unit is formed as the half-slice photovoltaic module circuit the negative pole. The invention also discloses a half-slice photovoltaic module. When the half-slice photovoltaic module circuit provided by the present invention is applied to the photovoltaic module, it not only solves the hot spot effect, but also facilitates welding operation and mass production.

Description

A half-slice photovoltaic module circuit and a half-slice photovoltaic module

technical field

The invention relates to the technical field of solar cells, in particular to a half-slice photovoltaic component circuit and a half-slice photovoltaic component including the half-slice photovoltaic component circuit.

Background technique

At present, most of the photovoltaic modules use the whole cell to weld the string assembly, and the power and module conversion efficiency are limited. In order to improve the power and conversion efficiency, the half-slice technology is used to weld the string. Although the conversion efficiency is improved, there will be problems. Hot spot effect, although some products can be improved by improving the hot spot effect, but due to the great limitations in the production process, it is difficult to produce in batches, or the labor cost is too high during production, or the equipment transformation is too expensive, etc. question.

Therefore, how to not only solve the problem of hot spot effect but also carry out mass production for half-slice stringing has become a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

The present invention aims to solve at least one of the technical problems in the prior art, and provides a half-slice photovoltaic component circuit and a half-slice photovoltaic component including the half-slice photovoltaic component circuit, so as to solve the problems in the prior art.

As the first aspect of the present invention, a half-slice photovoltaic module circuit is provided, wherein the half-slice photovoltaic module circuit includes multiple sets of battery string units, and each adjacent two sets of battery string units are connected by a first bus Bars are connected in series, and a diode is connected in parallel to both ends of each set of battery string units through a second bus bar, each set of battery string units includes two parallel connected battery strings, and each battery string includes multiple batteries connected in series, the head end of the first group of battery string units in multiple groups of battery string units is formed as the positive pole of the half-slice photovoltaic module circuit, and the last group of multiple groups of battery string units is The tail end of the battery string unit is formed as the negative electrode of the half-slice photovoltaic module circuit.

Preferably, the half-slice photovoltaic module circuit includes three sets of battery string units.

Preferably, each said string of batteries comprises 24 batteries connected in series.

Preferably, each said string of batteries comprises 20 batteries connected in series.

As a second aspect of the present invention, a half-slice photovoltaic module is provided, wherein the half-slice photovoltaic module includes a glass substrate and the aforementioned half-slice photovoltaic module circuit set on the glass substrate, and the half-slice photovoltaic module circuit is provided on the glass substrate. An insulating block is arranged between the first bus bar in the slice photovoltaic module circuit and the glass substrate, and an insulating block is arranged between the second bus bar in the half-slice photovoltaic module circuit and the glass substrate. insulation strips.

Preferably, the second bus bar is glued to the insulating bar by transparent adhesive tape.

Preferably, the half-slice photovoltaic module further includes a first encapsulation film and a second encapsulation film, the first encapsulation film is located between the glass substrate and the circuit of the half-slice photovoltaic assembly, and the second encapsulation film is located between The circuit of the half-slice photovoltaic module is on the surface away from the glass substrate.

Preferably, the glass substrate includes tempered glass.

In the half-slice photovoltaic module circuit provided by the present invention, adjacent battery strings are connected in parallel to form a battery string unit, and then a plurality of battery string units are connected in series. Reduced to I/2, and then through parallel connection, the output current of the component circuit is still I, which is compatible with the whole conventional component. In addition, the reduction of the current can reduce the internal loss, increase the power of the entire photovoltaic module circuit, thereby reducing the operating temperature of the module circuit, and at the same time reduce the hot spot effect of the photovoltaic module circuit. Since each battery string unit is connected in parallel with a bypass diode, when the photovoltaic module circuit is blocked, it can effectively bypass and protect the module. In addition, since the positive pole and the negative pole of the half-slice photovoltaic module circuit provided by the present invention are respectively located at both ends of the photovoltaic module circuit, when the photovoltaic module circuit is applied to a photovoltaic module, the welding operation is convenient, and it is convenient for mass production. Compared with conventional module production, The matching production line has little change and less investment.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a schematic structural diagram of a half-slice photovoltaic module circuit provided by the present invention.

Fig. 2 is another structural schematic diagram of the half-slice photovoltaic module circuit provided by the present invention.

Fig. 3 is a schematic diagram of the laminate structure of the half-slice photovoltaic module provided by the present invention.

FIG. 4 is a front enlarged structural schematic diagram of area C in the structural schematic diagram shown in FIG. 3 .

FIG. 5 is a rear view of the structural schematic diagram shown in FIG. 3 .

FIG. 6 is a side view of the structural schematic diagram shown in FIG. 3 .

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

As the first aspect of the present invention, a half-slice photovoltaic module circuit is provided, wherein, as shown in FIG. The string units 100 are connected in series through the first bus bar 200, and a diode 300 is connected in parallel at both ends of each group of the battery string units through the second bus bar 210, and each group of the battery string units 100 includes two parallel connected battery strings 110, each of the battery strings 110 includes a plurality of series-connected batteries 111, and the head end of the first group of the battery string units 100 in multiple groups of the battery string units 100 is formed as the half-slice photovoltaic The positive pole of the module circuit 10 and the tail end of the last group of the battery string units 100 in the multiple groups of battery string units 100 are formed as the negative pole of the half-slice photovoltaic module circuit 10 .

In the half-slice photovoltaic module circuit provided by the present invention, adjacent battery strings are connected in parallel to form a battery string unit, and then a plurality of battery string units are connected in series. Reduced to I/2, and then through parallel connection, the output current of the component circuit is still I, which is compatible with the whole conventional component. In addition, the reduction of the current can reduce the internal loss, increase the power of the entire photovoltaic module circuit, thereby reducing the operating temperature of the module circuit, and at the same time reduce the hot spot effect of the photovoltaic module circuit. Since each battery string unit is connected in parallel with a bypass diode, when the photovoltaic module circuit is blocked, it can effectively bypass and protect the module. In addition, since the positive pole and the negative pole of the half-slice photovoltaic module circuit provided by the present invention are respectively located at both ends of the photovoltaic module circuit, when the photovoltaic module circuit is applied to a photovoltaic module, the welding operation is convenient, and it is convenient for mass production. Compared with conventional module production, The matching production line has little change and less investment.

Specifically, as shown in FIGS. 1 and 2 , the half-slice photovoltaic module circuit 10 includes three sets of battery string units 100 .

Preferably, as shown in FIG. 1 , each battery string 110 includes 24 batteries 111 connected in series.

Preferably, as shown in FIG. 2 , each battery string 110 includes 20 batteries 111 connected in series.

It should be understood that the half-slice photovoltaic module circuits shown in Fig. 1 and Fig. 2 are only different in the number of batteries connected in series in each battery string, and are the same in terms of the connection relationship of multiple battery string units and the diodes connected in parallel.

As a second aspect of the present invention, a half-slice photovoltaic module is provided, wherein, as shown in FIG. 3 , the half-slice photovoltaic module includes a glass substrate 20 and the aforementioned half Sliced photovoltaic module circuit, an insulating block 21 is arranged between the first bus bar in the half-sliced photovoltaic module circuit 10 and the glass substrate, and the second bus bar in the half-sliced photovoltaic module circuit 10 An insulating strip 22 is provided between the strip and the glass substrate 20 .

The half-slice photovoltaic module provided by the present invention adopts the aforementioned half-slice photovoltaic module circuit. Compared with the whole photovoltaic module, it can not only improve the conversion efficiency and solve the problem of hot spot effect, but also because the positive electrode of the half-slice photovoltaic module circuit Both the negative electrode and the negative electrode are at both ends, which can make the welding operation convenient and facilitate mass production. Compared with conventional component production, the supporting production line has little change and low investment.

It can be understood that the regions D and E in FIG. 3 are the insulating strips 22 and the insulating blocks 21 at the positions where the battery string units 100 are connected in series.

As a specific implementation, as shown in FIG. 3 , in order to realize the fixation between the second bus bar and the insulating bar 22 , a transparent adhesive tape is used between the second bus bar and the insulating bar 22 23 paste.

As another specific implementation, as shown in FIG. 4 , the half-slice photovoltaic module further includes a first encapsulation film 24 and a second encapsulation film 25, and the first encapsulation film 24 is located between the glass substrate 20 and the Between the half-slice photovoltaic module circuit 10 , the second packaging film 25 is located on the surface of the half-slice photovoltaic module circuit 10 away from the glass substrate 20 .

Preferably, the glass substrate 20 includes tempered glass.

It can be understood that the welding position of the second bus bar and the insulating bar is on the back of the battery sheet with the same polarity as the second bus bar. During the pressure bearing process, the insulating bar may shrink, and all Describe the risk of contact between the second bus bar and the back of the cell. If it is set at this position, even if there is a contact, since the polarity of the bus bar is the same as that of the back of the cell, it will not have any influence on the product itself.

As shown in FIG. 5, the half-slice photovoltaic module also includes a nameplate 26 and a junction box 27 arranged on the back of the glass substrate 20, and potting glue needs to be poured around the glass substrate 20 during packaging. A sealant is provided on the edge portion where the half-slice photovoltaic module circuit 10 is in contact with the glass substrate 20 .

It should be understood that the glass substrate 20 is a rectangular glass substrate, and a barcode label 29 is provided on the short side frame of the glass substrate 20, as shown in FIG. Imp binning tab 28.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (8)

1. a kind of half section photovoltaic module circuit, it is characterised in that the half section photovoltaic module circuit（10）Including multigroup electricity Pond string location（100）, battery string location described in per two adjacent groups（100）Between pass through the first busbar（200）It is connected in series, and The two ends of battery string location described in every group are respectively by the second busbar diode in parallel, battery string location described in every group （100）Including two battery strings being connected in parallel（110）, each battery strings（110）Including multiple batteries being connected in series （111）, multigroup battery string location（100）In first group described in battery string location（100）Head end be formed as described half Section photovoltaic module circuit（10）Positive pole, multigroup battery string location（100）In last organize described battery string location （100）Tail end be formed as the half section photovoltaic module circuit（10）Negative pole.

2. half section photovoltaic module circuit according to claim 1, it is characterised in that the half section photovoltaic module circuit （10）Including three Battery pack string locations（100）.

3. half section photovoltaic module circuit according to claim 2, it is characterised in that each battery strings（110）Bag Include 24 batteries being connected in series（111）.

4. half section photovoltaic module circuit according to claim 2, it is characterised in that each battery strings（110）Bag Include 20 batteries being connected in series（111）.

5. a kind of half section photovoltaic module, it is characterised in that the half section photovoltaic module includes glass substrate（20）And setting In the glass substrate（20）On Claims 1-4 in half section photovoltaic module circuit described in any one, the hemisection Piece photovoltaic module circuit（10）In first busbar and the glass substrate between be provided with collets（21）, it is described Half section photovoltaic module circuit（10）In second busbar and the glass substrate（20）Between be provided with insulation strip （22）.

6. half section photovoltaic module according to claim 5, it is characterised in that second busbar and the insulation strip （22）Between pass through adhesive tape（23）Paste.

7. half section photovoltaic module according to claim 5, it is characterised in that the half section photovoltaic module also includes the One packaging film（24）With the second packaging film（25）, first packaging film（24）Positioned at the glass substrate（20）With institute State half section photovoltaic module circuit（10）Between, second packaging film（25）Positioned at the half section photovoltaic module circuit （10）Away from the glass substrate（20）Surface on.

8. the half section photovoltaic module according to any one in claim 5 to 7, it is characterised in that the glass substrate （20）Including safety glass.