A bypass diode pasted anti-hot spot photovoltaic curtain wall assembly

Abstract

The utility model discloses a kind of hot spot photovoltaic curtain wall components of bypass diode pasting, including front plate glass, adhesive film one, cell piece, adhesive film two, back plate glass sequentially assembled from light receiving surface, the cell piece is connected into battery string, diode pasting layer is equipped at the cell piece, wherein diode pasting layer includes conductive adhesive tape, double-sided insulating tape and bypass diode, the double-sided insulating tape is attached between two battery strings, and its two ends are respectively overlapped on the back surface edge of cell piece.The utility model adopts the mode of every 1 cell piece parallel 1 diode, when 1 cell piece occurs hot spot, only bypass this cell piece, other cell piece normal power generation, solve the problem that the overall power generation power of other components is reduced due to 1 cell piece because of hot spot phenomenon.Secondly, patch diode does not affect the packaging of photovoltaic curtain wall, does not need to be welded, only needs to be pasted, easy to operate, easy to implement, improve the security of photovoltaic curtain wall component.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, specifically to a photovoltaic curtain wall component with bypass diode mounting for preventing hot spots. Background Technology

[0002] With the increasing application of building-integrated photovoltaics (BIPV), the safety of photovoltaic (PV) curtain wall components is receiving more and more attention. Current PV curtain wall heat spot prevention measures use the same method as traditional PV modules, employing diodes in the junction box to bypass the four strings of solar cells to address the heat spot problem.

[0003] When a single cell in an existing photovoltaic module exhibits a hot spot effect, the diode in the junction box acts as a bypass, bypassing all four cells in the photovoltaic module. This results in a sharp decrease in power generation, wasting resources and increasing costs.

[0004] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a photovoltaic curtain wall component with bypass diode mounting to prevent hot spots, thus solving the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a photovoltaic curtain wall component with bypass diode mounting for preventing heat spots, comprising a front glass panel, a first encapsulant film, a solar cell, a second encapsulant film, and a back glass panel, assembled sequentially from the light-receiving surface. The solar cells are connected in series to form a solar cell string. A bypass diode mounting layer is provided at each solar cell. The bypass diode mounting layer includes conductive tape, double-sided insulating tape, and a bypass diode. The double-sided insulating tape is attached between two solar cell strings, with its two ends overlapping the back edge of the solar cell. The width of the double-sided insulating tape is greater than the gap between the solar cell strings, and the gap between the solar cell strings is greater than the width of the bypass diode. Two sections of conductive tape are respectively attached to the back of the ends of two adjacent solar cells in the same string. One section of conductive tape is attached to one end of the back of the solar cell, and the other section of conductive tape is attached to one end of the back of another solar cell. The bypass diode is attached to the insulating tape, and the polarity of the bypass diode corresponds to the polarity of the solar cell.

[0009] Preferably, the front and back glass panels are, but not limited to, ultra-clear tempered glass;

[0010] Preferably, the first and second adhesive films are, but not limited to, PVB adhesive film, SGP adhesive film, etc.

[0011] Preferably, the solar cell is, but not limited to, a crystalline silicon solar cell;

[0012] Preferably, the conductive tape is, but not limited to, single-sided adhesive conductive tape, tin-plated copper tape, etc.

[0013] Preferably, the insulating tape is, but not limited to, single-sided adhesive insulating tape, double-sided adhesive insulating tape, etc.

[0014] Preferably, the bypass diode is, but not limited to, a surface-mount bypass diode;

[0015] Preferably, the placement of the bypass diode is based on the thickness and shape of the diode, but is not limited to the back of the battery cell, between battery strings, etc.; a battery string is a circuit unit formed by connecting multiple battery cells in series or in parallel.

[0016] (III) Beneficial Effects

[0017] After adopting the above technical solution, this utility model has the following advantages compared with the prior art: This utility model provides a bypass diode-mounted anti-hotspot photovoltaic curtain wall module, which uses a parallel connection of one diode for each solar cell. When a hotspot occurs on one solar cell, only that cell is bypassed, while the other solar cells generate electricity normally, solving the problem of reduced overall power generation of the module due to a hotspot on one solar cell. Secondly, using surface-mount diodes does not affect the encapsulation of the photovoltaic curtain wall, requires no soldering, only mounting, making operation simple and implementation easy, and improving the safety of the photovoltaic curtain wall module. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of the photovoltaic curtain wall component of this utility model;

[0019] Figure 2 This is a schematic diagram of the bypass diode mounting of this utility model.

[0020] In the diagram: 1. Front panel glass; 2. Adhesive film one; 3. Battery cell; 4. Adhesive film two; 5. Back panel glass; 6. Bypass diode mounting layer; 7. Battery cell one; 8. Battery cell two; 9. Battery string one; 10. Battery string two; 11. Conductive tape; 12. Bypass diode; 13. Insulating tape. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-2 As shown: A photovoltaic curtain wall module with bypass diodes for preventing heat spots includes a front glass panel 1, a first film 2, a solar cell 3, a second film 4, and a back glass panel 5 assembled sequentially from the light-receiving surface. A bypass diode layer 6 is provided at the solar cell 3.

[0023] The bypass diode mounting method consists of four steps (such as...). Figure 2 ).

[0024] Step 1: Before applying the second adhesive film 4, attach a section of insulating tape 13 (using adhesive insulating tape or double-sided adhesive insulating tape) between the two battery strings. The two ends of the insulating tape 13 overlap the back edge of the battery cell 3. The width of the insulating tape 13 is greater than the gap between the battery strings, and the gap between the battery strings is greater than the width of the bypass diode 12.

[0025] Step 2: Apply two sections of conductive tape 11 to the back of the ends of two adjacent battery cells 3 in the same string. The length of the conductive tape 11 is greater than the length of the battery cell 3. One section of conductive tape 11 is applied to one end of the back of battery cell 1 7, and the other section of conductive tape 11 is applied to one end of the back of battery cell 2 8, to ensure good contact between the conductive tape 11 and the main grid line of battery cell 3.

[0026] Step 3: Attach the surface-mount bypass diode 12 to the insulating tape 13, ensuring that the positive and negative terminals of the diode are attached to the two sections of conductive tape 11 respectively. The width of the bypass diode 12 is smaller than the width of the insulating tape 13, and the polarity of the diode must correspond to the polarity of the battery cell 3.

[0027] Step 4: Apply insulating tape 13 to the upper surface of the positive and negative terminals of the bypass diode 12 on one side for fixation.

[0028] A bypass diode 12 is used to bypass a single solar cell 3, and the bypass diode 12 is attached using a combination of conductive tape 11 and insulating tape 13. The diode can be attached to the back of the solar cell 3, between solar cell strings, or other locations.

[0029] Specifically, each solar cell 3 is connected in parallel with a bypass diode 12, which can bypass each solar cell 3 individually. When a hot spot occurs in a solar cell 3, the individual solar cell 3 is bypassed, which increases the power generation of the photovoltaic curtain wall module and reduces the cost.

[0030] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A heat-spot-preventing photovoltaic curtain wall assembly with bypass diode patching, comprising, in order from a light-receiving surface, a front plate glass, a first adhesive film, a cell sheet, a second adhesive film, and a back plate glass, wherein the cell sheet is connected in series to form a cell string. A bypass diode mounting layer is provided at the battery cell, wherein the bypass diode mounting layer includes conductive tape, insulating tape, and a bypass diode. The insulating tape is attached between two battery strings, with its two ends overlapping the back edge of the battery cell. The width of the insulating tape is greater than the gap between the battery strings, and the gap between the battery strings is greater than the width of the bypass diode. Two sections of the conductive tape are respectively attached to the back of the ends of two adjacent battery cells in the same string, with one section of the conductive tape attached to one end of the back of the battery cell and the other section attached to one end of the back of another battery cell. The bypass diode is attached to the insulating tape, and the polarity of the bypass diode corresponds to the polarity of the battery cell.

2. A bypass diode attached heat-spot-preventing photovoltaic curtain wall assembly according to claim 1, characterized in that: The conductive tape is longer than the battery cell, and the bypass diode is narrower than the insulating tape.

3. A bypass diode attached heat-spot-preventing photovoltaic curtain wall assembly according to claim 1, characterized in that: The positive and negative terminals of the bypass diode are respectively attached to two sections of conductive tape, and the upper surfaces of the positive and negative terminals of the bypass diode are covered with insulating tape on one side.

4. A bypass diode attached heat-spot-preventing photovoltaic curtain wall assembly according to claim 1, characterized in that: The conductive tape is a single-sided adhesive conductive tape or a tin-plated copper tape, and the insulating tape is an adhesive insulating tape or a double-sided adhesive insulating tape.

5. A bypass diode attached heat-spot-preventing photovoltaic curtain wall assembly according to claim 1, wherein: The bypass diode is a surface-mount bypass diode.

6. A photovoltaic wall module with bypass diode mounting for preventing hot spots according to claim 1, characterized in that: The solar cells are crystalline silicon solar cells.

7. A bypass diode attached heat-spot-preventing photovoltaic curtain wall assembly according to claim 1, characterized in that: The first and second adhesive films are made of PVB or SGP adhesive film.

8. A bypass diode attached heat-spot-preventing photovoltaic curtain wall assembly according to claim 1, characterized in that: The front and back glass panels are made of ultra-clear tempered glass.

Images