CN209785948U - Photovoltaic module - Google Patents

Abstract

The utility model discloses a photovoltaic module, which comprises a back plate, a cover plate, a battery string and a diode, wherein the battery string and the diode are arranged between the back plate and the cover plate, the battery string comprises a plurality of battery pieces which are connected by welding strips, the end part of the photovoltaic module is shielded by the adjacent photovoltaic module under the low-angle illumination to form a shielding area, each battery piece corresponding to the shielding area is connected with one diode in parallel, aiming at the condition that the solar irradiation angle of the photovoltaic module is smaller in the morning and evening so that the end part is shielded by the adjacent photovoltaic module to generate the hot spot phenomenon, each battery piece corresponding to the area which is easy to be shielded in the battery string is connected with one diode in parallel, the hot spot phenomenon caused by the shielding generated by the solar irradiation angle can be effectively avoided, the power loss of the photovoltaic module is reduced, the power generation performance is improved, and the diodes are arranged in a targeted way, low cost and easy popularization.

Description

Photovoltaic module

Technical Field

The utility model relates to a photovoltaic module technical field especially relates to a photovoltaic module.

Background

Referring to fig. 1, in fig. 1, the photovoltaic modules are arranged in an array, a first photovoltaic module 100 and a second photovoltaic module 200 are arranged adjacent to each other in the photovoltaic array, an arrow in the figure indicates a solar irradiation light with a small angle, D is a shielding region formed by the first photovoltaic module 100 being shielded by the adjacent second photovoltaic module 200 under the irradiation of the solar irradiation light, a current generated by a cell in the shielding region D in the first photovoltaic module 100 becomes small, a single cell has a P-N junction structure similar to a diode and has a reverse avalanche breakdown phenomenon, and when a maximum current generated by the shielded single cell is smaller than a current of a circuit, the single cell has a negative pressure and becomes a load in the circuit, and consumes power generated by other cells in a form of heat to generate a hot spot phenomenon.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the photovoltaic module that exists among the prior art and making the tip sheltered from and produce the shortcoming of hot spot phenomenon less at morning and evening sun irradiation angle, and the photovoltaic module who provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a photovoltaic module, includes and is in including backplate, apron, setting the backplate with battery cluster and diode between the apron, the battery cluster includes a plurality of battery pieces that connect through the solder strip, photovoltaic module's tip is sheltered from the formation by adjacent photovoltaic module under small-angle illumination and is sheltered from the region, shelter from every that the region corresponds the battery piece all connects in parallel one the diode.

Preferably, the diode is a planar diode.

Preferably, the battery piece is packaged between the back plate and the cover plate through an adhesive film.

Preferably, the adhesive film is PVB or POE or EVA.

Preferably, the back plate and the cover plate are both made of transparent toughened glass.

The utility model has the advantages that:

the utility model discloses to photovoltaic module the less condition that makes the tip sheltered from and produce the hot spot phenomenon by adjacent photovoltaic module of solar radiation angle in morning and evening, the parallelly connected diode of every battery piece that is correspond by the region that shelters from easily in the battery string, can effectively avoid the hot spot phenomenon that causes because of sheltering from of solar radiation angle production, reduce and reduce photovoltaic module's power loss, improve the generating performance, the diode pertinence is laid simultaneously, low cost easily promotes.

Drawings

FIG. 1 is a schematic view of a photovoltaic module with a blocked end when the sun is illuminated at a smaller angle in the prior art;

Fig. 2 is a schematic structural diagram of a first embodiment of a photovoltaic module according to the present invention;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a circuit diagram of the diode of FIG. 2;

Fig. 5 is a schematic structural diagram of a second embodiment of a photovoltaic module according to the present invention;

Fig. 6 is a connection circuit diagram of the diode of fig. 5.

In the figure: 100 first photovoltaic modules, 200 second photovoltaic modules, 1 back panel, 2 cover plates, 3 battery strings, 31 battery pieces, 31-a first idle battery pieces, 31-b second idle battery pieces, 4 diodes, 5 welding strips, 6 adhesive films, 7 junction boxes and 8 storage batteries.

Detailed Description

in order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

it will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The first embodiment is as follows:

Referring to fig. 2-4, a photovoltaic module includes a back plate 1, a cover plate 2, a battery string 3 disposed between the back plate 1 and the cover plate 2, and a diode 4, wherein the battery string 3 includes a plurality of battery pieces 31 connected by solder strips 5, and the diode 4 is connected in parallel with the battery pieces 31 at the end of the battery string 3.

in this embodiment, the battery strings 3 have six groups, each group of battery strings 3 includes ten battery pieces 31, the battery pieces 31 are fixedly connected by the solder strips 5, sixty battery pieces 31 are packaged between the back plate 1 and the cover plate 2 by the adhesive film 6, the battery pieces 31 in each group of battery strings 3 are connected in series, and the battery strings 3 are connected in parallel.

Specifically, the adhesive film 6 is PVB, POE or EVA.

Photovoltaic module still includes terminal box 7, terminal box 7 fixed mounting is in the one end of backplate 1, be provided with anodal output (not shown in the figure) and negative pole output (not shown in the figure) in the terminal box 7, the one end of anodal output is connected with the anodal delivery outlet of battery cluster 3, the other end of anodal output and the anodal input port connection of battery 8, the one end of negative pole output is connected with the negative pole delivery outlet of battery cluster 3, the other end of negative pole output and the negative pole input port connection of battery 8, battery cluster 3 passes through anodal output and negative pole output and forms closed loop with battery 8, carry the electric energy that 3 work of battery cluster produced to in the battery 8.

The diodes 4 are planar diodes 4, the diodes 4 are fixed at one end of the battery strings 3, and one diode 4 is connected in parallel to the battery piece 31 corresponding to the shielded area in each group of battery strings 3 due to the small solar irradiation angle in the morning and evening. Specifically, two ends of the diode 4 are respectively connected to two poles of the battery piece 31 through conductive strips (not shown), the conductive strips are connected to the current-guiding strips (not shown) of the battery piece 31, and the conductive strips are specifically tinned copper strips.

Referring to fig. 2 to 4, the end of the photovoltaic module is shielded by the adjacent photovoltaic module under small-angle illumination to form a shielded area, in this embodiment, the shielded area is an area where the first row or the last row of the battery pieces 31 in the battery string 3 is located because the solar illumination angle is smaller in the morning and evening, that is, the battery piece corresponding to the shielded area formed by the photovoltaic module under small-angle illumination by the adjacent photovoltaic module is the first idling battery piece 31-a, and the first idling battery pieces 31-a in each group of the battery strings 3 are all connected in parallel with one diode 4.

Understandably, when the photovoltaic modules are arranged obliquely towards the sunrise direction, the end part of each group of cell strings 3 is shielded by the adjacent photovoltaic modules to form a shielding area under the condition that the solar irradiation angle is smaller in the morning; when the photovoltaic modules are obliquely arranged towards the sunset direction, the end part of each group of the cell strings 3 is shielded by the adjacent photovoltaic modules to form a shielding area under the condition that the sun irradiation angle is smaller in the afternoon.

Specifically, when the first idling cell piece 31-a stops operating, the current that can be generated by the first idling cell piece 31-a decreases, and when the maximum current that can be generated by the first idling cell piece 31-a is less than the current of the circuit, the first idling cell piece 31-a is under negative pressure and consumes the power generated by the other cell pieces 31 as heat.

In the first or last row of battery pieces 31 in the battery string 3, the diode 4 is connected in parallel, and since the diode 4 only allows current to pass through in a single direction and blocks current in the reverse direction, in this embodiment, the forward current direction of the diode 4 is the same as the current direction when the battery string 3 normally operates, so that when the first idle battery piece 31-a stops operating, the diode 4 can short-circuit the first idle battery piece 31-a, and further prevent the first idle battery piece 31-a from becoming a power receiver in a circuit, thereby eliminating the influence of the first idle battery piece 31-a on the circuit.

Example two:

Referring to fig. 5-6, the difference between the first embodiment and the second embodiment is that the area of the pv module, which is shielded by the adjacent pv modules due to the small irradiation angle of the early and late sun, is the area where the first and second rows or the last and second rows of the battery pieces 31 in the battery string 3 are located, the battery pieces corresponding to the shielded area of the pv module, which is shielded by the adjacent pv modules under small-angle illumination, are the first idle battery piece 31-a and the second idle battery piece 31-b, and the first idle battery piece 31-a and the second idle battery piece 31-b in each battery string 3 are respectively connected in parallel with one diode 4. Specifically, when both the first and second idling cells 31-a and 31-b are stopped due to shielding, the diode 4 can short-circuit the first and second idling cells 31-a and 31-b, and prevent the first and second idling cells 31-a and 31-b from becoming power receivers in the circuit, thereby eliminating the influence of the first and second idling cells 31-a and 31-b on the circuit.

The utility model discloses to photovoltaic module the less condition that makes the tip sheltered from and produce the hot spot phenomenon by adjacent photovoltaic module of solar radiation angle in morning and evening, the parallelly connected diode 4 of every battery piece 31 that is correspond by the region that shelters from easily in battery cluster 3, effectively avoid because of sheltering from and the hot spot phenomenon that causes of solar radiation angle production, reduce and reduce photovoltaic module's power loss, improve the generating performance, diode 4 pertinence is laid simultaneously, low cost easily promotes.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (5)

1. The utility model provides a photovoltaic module, its characterized in that includes backplate, apron, sets up the backplate with battery cluster and diode between the apron, the battery cluster includes a plurality of battery pieces that connect through the solder strip, photovoltaic module's tip is sheltered from the formation by adjacent photovoltaic module under low-angle illumination and is sheltered from the region, shelter from every that the region corresponds the battery piece all connects in parallel one the diode.

2. A photovoltaic module according to claim 1, wherein the diode is a planar diode.

3. the photovoltaic module of claim 1, wherein the battery piece is encapsulated between the back sheet and the cover sheet by an adhesive film.

4. The photovoltaic module of claim 3, wherein the adhesive film is PVB or POE or EVA.

5. the photovoltaic module of claim 1, wherein the back sheet and the cover sheet are both transparent tempered glass.