CN218730995U

CN218730995U - Flexible solar energy component of hot spot prevention CIGS

Info

Publication number: CN218730995U
Application number: CN202221891965.0U
Authority: CN
Inventors: 吉心紫; 吉训严
Original assignee: Zhejiang Jiubang Technology Co ltd
Current assignee: Zhejiang Jiubang Technology Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2023-03-24
Anticipated expiration: 2032-07-22

Abstract

The utility model relates to a flexible solar energy component of hot spot prevention CIGS, including a plurality of battery strings, be equipped with a plurality of battery pieces in the battery string, battery piece parallel connection in the same battery string, series connection between the adjacent battery string. The utility model has the advantages that: when one or more battery pieces in the battery string are shielded, current can flow through electrodes of other battery pieces, and the phenomenon that the current is gathered on the shielded battery pieces to generate a hot spot effect is avoided; a diode is not needed, and the ultrathin requirement is met; the negative pole conducting strip has the effect of connection piece, makes the battery piece connect more firmly.

Description

Flexible solar energy component of hot spot prevention CIGS

Technical Field

The utility model relates to a photovoltaic power generation field especially relates to a flexible solar energy component of hot spot prevention CIGS.

Background

The flexible CIGS solar module has the characteristics of light weight, thin thickness and the like, and the module preparation technology is rapidly developed. Flexible CIGS modules have been incorporated into square surfaces of life in conjunction with a variety of carriers, such as curved roofs, contoured carports, street light poles, tents, and the like. When the flexible CIGS component is combined with the carrier, the flexible CIGS component is easily influenced by the carrier, and the problem of uneven light receiving exists like an integrated street lamp rod component; and is also susceptible to the environment in which the carrier is located, such as greening shading. Thus, flexible CIGS modules are susceptible to current crowding during power generation resulting in "hot spots," which can lead to cell failure at high temperatures for extended periods of time.

At present, when a flexible module is packaged, diodes are connected in parallel between battery plates to achieve the effect of reducing 'hot spots', but in the preparation process of the module, the diodes and the battery plates need to bear the effect of high temperature and high pressure, so that the diode is easily damaged to cause the inefficiency of the module, and meanwhile, the encapsulation material is also raised at the positions of the diodes, so that when an ultrathin (the thickness is less than 1.5 mm) flexible CIGS module is prepared, the diodes cannot be added, but the problem that the ultrathin flexible CIGS module is easily subjected to 'hot spots' is caused.

Disclosure of Invention

The utility model discloses mainly solved current ultra-thin flexible CIGS subassembly because of the unable problem that produces the hot spot effect easily that leads to of adding the diode of thickness demand, provided a flexible solar energy component of hot spot CIGS of preventing that need not to set up the diode.

The utility model provides a technical scheme that its technical problem adopted is, a flexible solar energy component of hot spot prevention CIGS, including a plurality of battery strings, be equipped with a plurality of battery pieces in the battery string, battery piece parallel connection in the same battery string, series connection between the adjacent battery string.

When one or more battery pieces in the battery string are shielded, current can flow through the electrodes of other battery pieces, and the phenomenon that the current is gathered on the shielded battery pieces to generate a hot spot effect is avoided.

As a preferable scheme of the scheme, the battery piece sequentially comprises a composite water-resistant film, a front adhesive film, a battery cathode metal lead, a battery, a back adhesive layer and an insulating metal back plate from top to bottom.

As a preferable scheme of the above scheme, the back glue layer is provided with an anode conducting strip and a cathode conducting strip, the anode conducting strip is electrically connected with the anode of the battery, and the cathode conducting strip is electrically connected with the cathode metal wire of the battery.

As a preferable mode of the above, the battery negative electrode metal lead is disposed on the battery negative electrode in an S shape.

As a preferable mode of the above-mentioned scheme, an insulating sheet is provided between the negative electrode conductive sheet and the battery positive electrode.

As a preferable scheme of the above scheme, adjacent battery pieces in the same battery string are connected to the same negative electrode conducting piece. The negative pole conducting strip has the effect of connection piece, makes the battery piece connect more firmly.

As a preferable scheme of the above scheme, in adjacent battery strings, the positive conductive sheet of the battery sheet in the previous battery string is connected with the negative conductive sheet of the battery sheet in the next battery string.

As a preferable scheme of the above scheme, each negative conducting strip is connected to two positive conducting strips, and each positive conducting strip is connected to two negative conducting strips.

The utility model has the advantages that: when one or more battery pieces in the battery string are shielded, current can flow through electrodes of other battery pieces, and the current is prevented from being gathered on the shielded battery pieces to generate a hot spot effect; a diode is not needed, and the ultrathin requirement is met; the negative pole conducting strip has the effect of connection piece, makes the battery piece connect more firmly.

Drawings

Fig. 1 is a schematic structural diagram of a CIGS flexible solar module for preventing hot spots.

FIG. 2 is a schematic cross-sectional view at AA' in FIG. 1.

Fig. 3 is a wiring diagram of a battery negative electrode metal lead.

Fig. 4 is an equivalent circuit diagram of a hot spot prevention CIGS flexible solar module.

1-battery piece 2-positive electrode conducting piece 3-negative electrode conducting piece 4-composite water-resistant film 5-front glue film 6-battery negative electrode metal lead 7-battery 8-insulating piece 9-gum layer 10-insulating metal backboard.

Detailed Description

The technical solution of the present invention is further described below by way of examples and with reference to the accompanying drawings.

Example (b):

the CIGS flexible solar module for preventing hot spots in the embodiment includes, as shown in fig. 1, a plurality of cell strings, where a plurality of cells 1 are arranged in the cell strings, the cells 1 in the same cell string are connected in parallel, and adjacent cell strings are connected in series. In this embodiment, the battery pieces in the same row form a battery string, the adjacent battery pieces 1 in the same battery string are connected with the same negative conductive piece 3, in the adjacent battery string, the positive conductive piece 2 of the battery piece 1 in the previous battery string is connected with the negative conductive piece 3 of the battery piece 1 in the next battery string, each negative conductive piece 3 is connected with two positive conductive pieces 2, and each positive conductive piece 2 is connected with two negative conductive pieces 3. In this embodiment, the negative pole conducting strip has the effect of connection piece, makes the battery piece connect more firmly.

As shown in fig. 2, the battery piece is a composite water-resistant film 4, a front adhesive film 5, a battery cathode metal wire 6, a battery 7, a back adhesive layer 9 and an insulating metal back plate 10 from top to bottom, wherein the back adhesive layer 9 is provided with a cathode conductive sheet 2 and a cathode conductive sheet 3, the cathode conductive sheet 2 is electrically connected with the battery anode, i.e. the lower surface of the battery, the cathode conductive sheet 3 is electrically connected with the battery cathode metal wire 6, as shown in fig. 3, the battery cathode metal wire 6 is S-shaped and is arranged on the battery cathode, i.e. the upper surface of the battery, and meanwhile, in order to prevent the battery from short circuit, an insulating sheet 8 is further arranged between the cathode conductive sheet 3 and the battery anode.

As shown in fig. 4, E1 to E9 are battery pieces, where E1 to E3, E4 to E6, and E7 to E9 constitute three battery strings, and the three battery strings are connected in series, and in a case where all the battery pieces are not shielded, current can flow normally without being collected at a certain battery piece; when a certain cell is shielded, assuming that the shielded cell is E5, the current originally passing through E5 can pass through E4 and E6, and the current is prevented from gathering at E5 to generate a hot spot effect. Therefore, the flexible solar module for preventing hot spot CIGS in the embodiment can effectively reduce the probability of generating the hot spot effect without arranging a diode, and has the characteristics of ultra-thinness and hot spot prevention.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A hot spot prevention CIGS flexible solar module is characterized in that: including a plurality of battery clusters, be equipped with a plurality of battery pieces in the battery cluster, battery piece parallel connection in same battery cluster, series connection between the adjacent battery cluster, the battery piece is compound water film, preceding glued membrane, battery negative pole wire, battery, gum layer and insulating metal backplate from top to bottom in proper order, be equipped with anodal conducting strip and negative pole conducting strip in the gum layer, anodal conducting strip is connected with the anodal electricity of battery, the negative pole conducting strip is connected with battery negative pole wire electricity, every two anodal conducting strips are connected to the negative pole conducting strip, and two negative pole conducting strips are connected to every anodal conducting strip.

2. The CIGS flexible solar module as recited in claim 1 wherein: the battery cathode metal lead is arranged on the battery cathode in an S shape.

3. The CIGS flexible solar module as claimed in claim 2, wherein the CIGS flexible solar module is characterized in that: and an insulating sheet is arranged between the negative conducting strip and the positive electrode of the battery.

4. The CIGS flexible solar module as claimed in claim 3, wherein the CIGS flexible solar module is characterized in that: and adjacent battery pieces in the same battery string are connected with the same negative electrode conducting piece.

5. The CIGS flexible solar module as claimed in claim 4, wherein the CIGS flexible solar module is characterized in that: and the positive conducting strip of the cell in the previous cell string is connected with the negative conducting strip of the cell in the next cell string.