CN-121985601-A - Shadow shielding prevention solar photovoltaic module and forming process thereof

CN121985601ACN 121985601 ACN121985601 ACN 121985601ACN-121985601-A

Abstract

The invention relates to a shadow shielding-preventing solar photovoltaic module and a forming process thereof, which belong to the technical field of photovoltaics and comprise a photovoltaic frame, a backboard, a glass layer and two symmetrically arranged power supply mechanisms, wherein the power supply mechanism comprises a first photovoltaic unit and a second photovoltaic unit which are connected in parallel, each photovoltaic unit is formed by connecting a plurality of battery piece groups in series, a middle converging belt corresponding to the battery piece groups is arranged on the backboard, a diode which is reversely arranged is arranged on the middle converging belt, so that the first photovoltaic unit and the second photovoltaic unit form a same-frequency reverse circuit.

Inventors

ZHOU XINHUA
LI JIAN
DU HONGJUN
YANG JIE

Assignees

江苏宁美新能源有限公司

Dates

Publication Date: 20260505
Application Date: 20260402

Claims (10)

1.A solar photovoltaic module capable of preventing shadow shielding comprises a photovoltaic frame, wherein a backboard and a glass layer for transmitting light are fixedly arranged in the photovoltaic frame, and a positive electrode junction box and a negative electrode junction box are arranged on the backboard; the photovoltaic device is characterized in that two symmetrically arranged power supply mechanisms are arranged between the back plate and the glass layer, the positive electrode junction box and the negative electrode junction box are arranged between the power supply mechanisms, the power supply mechanisms comprise at least one photovoltaic unit group, each photovoltaic unit group comprises a first photovoltaic unit and a second photovoltaic unit which are arranged in parallel along the long side direction of the photovoltaic frame, and a bus group arranged between the first photovoltaic unit and the second photovoltaic unit, each first photovoltaic unit and each second photovoltaic unit comprises a plurality of groups of battery pieces which are arranged side by side along the wide side direction of the photovoltaic frame and are sequentially connected in series, each battery piece group comprises a plurality of photovoltaic battery pieces which are sequentially connected in series through a plurality of welding strips, each bus group comprises a first bus strip and a second bus strip which are fixed on the back plate, each battery piece group on one side is connected with the first bus strip through the welding strips, each battery piece group on the other side is connected with the second bus strip through the welding strips, each middle bus strip corresponding to each battery piece group on the back plate is arranged on the back plate in parallel to the first junction box and the second bus strip through the first bus strip, each middle bus strip is arranged on the back plate and the back plate through the bus strip, each middle bus strip is arranged on the back plate is connected with the middle bus strip through the first bus strip and the middle strip, and the middle strip is arranged on the back plate and the middle bus strip is connected with the middle strip, and the middle strip is connected with the middle strip between the middle strip and the battery piece group and the middle strip, and the photovoltaic strip is connected between the photovoltaic strip and the photovoltaic strip is connected between the photovoltaic unit and the photovoltaic unit between the photovoltaic unit. Diodes are arranged on the middle bus strips passing through the lower sides of the battery piece groups in the first photovoltaic units, the adjacent diodes in the first photovoltaic units are reversely arranged, the middle bus strips passing through the lower sides of the battery piece groups in the second photovoltaic units are removed from the middle bus strips, the two sides of the middle bus strips are connected with the first total bus strips and the second total bus strips, the diodes are arranged on the rest middle bus strips, the diodes on the adjacent battery piece groups are reversely arranged, the corresponding diodes in the first photovoltaic units and the second photovoltaic units are reversely arranged, and the first photovoltaic units and the second photovoltaic units are connected with the first total bus strips through the middle bus strips on one side and form a parallel connection circuit through the middle bus strips on the other side and the second total bus strips, and the same-frequency reverse circuit is formed.
2. The shadow shielding solar photovoltaic module according to claim 1, wherein the first photovoltaic unit and the second photovoltaic unit each comprise a first battery piece group, a second battery piece group, a third battery piece group and a fourth battery piece group which are arranged side by side along the broadside direction of the photovoltaic frame and are sequentially connected in series, the busbar group further comprises a third busbar zone arranged between the first busbar zone and the second busbar zone, two sides of the first photovoltaic unit and the second photovoltaic unit are further provided with side band groups, each side band group comprises a first busbar zone crossing the first battery piece group and the second battery piece group and a second busbar zone crossing the third battery piece group and the fourth battery piece group, two ends of the first battery piece group are respectively connected with the first busbar zone and the first busbar zone through a welding zone, two ends of the second battery piece group are respectively connected with the first busbar zone and the third busbar zone through a welding zone, two ends of the third battery piece group are respectively connected with the second busbar zone and the fourth busbar zone through a third busbar zone, two ends of the second busbar zone are respectively connected with the second busbar zone and the fourth busbar zone through a third busbar zone, the second busbar zone and the fourth busbar zone are respectively connected with the two ends of the fourth busbar zone through a welding zone.
3. The shadow-shielding solar photovoltaic module according to claim 2, wherein the back plate is provided with a first middle busbar corresponding to the first cell group, a second middle busbar corresponding to the second cell group, a third middle busbar corresponding to the third cell group and a fourth middle busbar corresponding to the fourth cell group, the first middle busbar is electrically connected with the first busbar, the first total busbar and the positive junction box of the first photovoltaic unit in sequence, the second middle busbar is electrically connected with the first busbar, the third busbar, the first busbar and the positive junction box of the first photovoltaic unit in sequence, the third middle busbar is electrically connected with the second busbar, the third busbar and the second junction box of the second photovoltaic unit in sequence, and the fourth middle busbar is electrically connected with the first busbar, the third busbar, the second busbar and the negative junction box of the second photovoltaic unit in sequence.
4. A shadow shielding solar photovoltaic module according to claim 3, wherein the two sides of the positive electrode junction box and the negative electrode junction box are respectively provided with a connecting and converging belt, the connecting and converging belt on one side of the positive electrode junction box is connected with the first middle converging belt, the connecting and converging belt on the other side of the positive electrode junction box is connected with the second middle converging belt, the connecting and converging belt on one side of the negative electrode junction box is connected with the third middle converging belt, and the connecting and converging belt on the other side of the negative electrode junction box is connected with the fourth middle converging belt.
5. The shadow-shielding solar photovoltaic module of claim 4, wherein the diodes are uniformly distributed on the intermediate bus bar along the extending direction of the intermediate bus bar and are fixedly connected with the intermediate bus bar by welding.
6. The shadow-shielding solar photovoltaic module of claim 5, wherein the back plate is provided with mounting grooves corresponding to the middle bus strips, the back plate is covered with a first EVA adhesive film, the first EVA adhesive film extends along the outline of the back plate, and the middle bus strips with the diodes fixed therein are fixed in the mounting grooves through the first EVA adhesive film.
7. The shading-preventing solar photovoltaic module according to claim 6, wherein an insulating strip is further arranged in the mounting groove and is pressed against the middle bus bar.
8. The shadow-shielding solar photovoltaic module of claim 7, wherein a wide EVA film is arranged between the battery piece group and the insulating strip, the width of the wide EVA film is larger than that of the insulating strip, a POE film is arranged between the battery piece group and the glass layer, the battery piece group is fixedly connected with the insulating strip through the wide EVA film, and the glass layer is fixedly connected with the battery piece group through the POE film.
9. The shadow shielding-preventing solar photovoltaic module molding process as claimed in claim 8, comprising the following steps: P1, welding a corresponding number of diodes on each intermediate bus bar; P2, connecting all photovoltaic cells in the cell group in series, and forming a finished cell group; p3, paving a POE adhesive film on the glass layer; p4, sequentially placing the battery plate groups connected in series on the POE adhesive film, adjusting the interval between the battery plate groups, and fixing the battery plate groups by using adhesive tape; P5, placing a wide EVA adhesive film with the width larger than that of the insulating strips on each battery piece group; p6, placing an intermediate bus-bar welded with each diode on the insulating strip, and fixing the intermediate bus-bar by using an adhesive tape; P7, paving the first EVA adhesive film on each battery piece group, each insulating strip and each middle bus belt, and coating the battery piece groups, the insulating strips and the middle bus belts between the first EVA adhesive film and the glass layer; p8, paving a back plate on the first EVA adhesive film, and embedding the insulating strips and the middle bus strips into the mounting grooves so as to form a piece to be laminated; p9, placing the to-be-laminated piece into a laminating machine, and forming a laminated piece after segmented lamination; And P10, taking out the laminated piece after lamination from the laminating machine, and cooling to form the complete solar panel.
10. The molding process of claim 9, wherein the segmented lamination is divided into two stages, the first stage lamination is performed at a temperature of 110+ -3deg.C and the second stage lamination is performed at a temperature of 140+ -3deg.C, and the lamination pressure is gradually increased from-80 MPa to-35 MPa.

Description

Shadow shielding prevention solar photovoltaic module and forming process thereof Technical Field The invention relates to the field of solar photovoltaic modules, in particular to a shadow shielding-preventing solar photovoltaic module and a forming process thereof. Background Solar panels, also known as photovoltaic modules, are devices that utilize the photovoltaic effect of semiconductor materials to directly convert solar energy into electrical energy. The core power generation unit is a solar cell, and the main stream material is silicon, and can be divided into monocrystalline silicon with higher conversion efficiency and polycrystalline silicon with lower cost. The panel is packaged in series to form a component, and is widely applied to the fields of centralized photovoltaic power stations, distributed roof systems, space spacecraft and the like. When current solar panel is sheltered from by leaf or other debris, the electric quantity of output can receive very big influence to take place hot spot effect, when present solar panel is sheltered from, can avoid the emergence of hot spot effect through the diode, but the setting of diode can be more than one third with solar panel's voltage drop, can influence the effect of charging for energy storage battery, and current diode concentrate the prepackage at the terminal box inside, the heat dissipation is slower, can cause solar panel local high temperature, very big influence solar panel's power generation, and is very inconvenient. Disclosure of Invention The invention aims to provide a shadow shielding-proof solar photovoltaic module, which is characterized in that the area of a single solar panel is changed into one half of the original area, the existing photovoltaic module is divided into a plurality of units to be connected in parallel, the number of battery pieces connected in series of each unit is the same, the voltages are communicated, and each battery piece group of each unit is provided with a diode for protection. The photovoltaic frame is internally and fixedly provided with a back plate and a glass layer for transmitting light, and the back plate is provided with a positive electrode junction box and a negative electrode junction box; the photovoltaic device comprises a back plate, a glass layer, a photovoltaic frame, a photovoltaic cell group, a first bus strip, a second bus strip, a plurality of groups of battery cells, a first bus strip, a second bus strip, a junction box and a junction box, wherein the two symmetrically arranged power supply mechanisms are arranged between the back plate and the glass layer, the positive electrode junction box and the negative electrode junction box are arranged between the power supply mechanisms, the power supply mechanisms comprise at least one photovoltaic cell group, the photovoltaic cell group comprises a first photovoltaic cell and a second photovoltaic cell which are arranged in parallel along the long side direction of the photovoltaic frame, and a bus strip group arranged between the first photovoltaic cell and the second photovoltaic cell, the first photovoltaic cell group comprises a plurality of groups of battery cells which are arranged in parallel along the wide side direction of the photovoltaic frame and are sequentially connected in series, each battery cell group comprises a first bus strip and a second bus strip which are fixed on the back plate, the battery cell group on one side is connected with the first bus strip through the bus strip, the battery cell group on the other side is electrically connected with the first bus strip through the second bus strip through the welding strip, the bus strip on the back plate is also provided with an intermediate bus strip which is in one-to-one correspondence to the battery cell group, each intermediate bus strip is arranged on the back plate, each intermediate bus strip is arranged in parallel to the first bus strip and the second bus strip through the first bus strip and the middle strip and the second bus strip is arranged on the two sides of the bus strip, and the bus strip is arranged in parallel to the middle bus strip with the middle bus strip and the middle bus strip is arranged with the first bus strip and the bus strip is arranged between the bus strip and the bus strip. Diodes are arranged on the middle bus strips passing through the lower sides of the battery piece groups in the first photovoltaic units, the adjacent diodes in the first photovoltaic units are reversely arranged, the middle bus strips passing through the lower sides of the battery piece groups in the second photovoltaic units are removed from the middle bus strips, the two sides of the middle bus strips are connected with the first total bus strips and the second total bus strips, the diodes are arranged on the rest middle bus strips, the diodes on the adjacent battery piece groups are reversely arranged, the corresponding diodes in the first photovoltaic uni