BIPV photovoltaic assembly

Abstract

The utility model discloses a building integrated photovoltaics (BIPV) photovoltaic assembly, which comprises a battery piece and glass pieces respectively arranged on two sides of the battery piece, and adhesive films are arranged between the corresponding sides of the glass pieces and the battery piece. The solar cell module further comprises a junction box, the junction box is provided with an external connection part and an embedded part, the embedded part is electrically connected with the cell pieces and embedded between the two adhesive films, and the external connection part is exposed out of the two adhesive films. According to the utility model, the junction box and the photovoltaic assembly are combined more firmly, the reject ratio is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the photovoltaic field, in particular to a BIPV photovoltaic component. Background Art

[0002] There are three types of installation positions for the junction box of photovoltaic modules, namely, installation on the front, back, and side of the module. Among them, BIPV photovoltaic modules are especially used in the field of curtain walls, and the junction box 2' is generally installed on the side of the module 1'. The conventional method is to use structural adhesive 3' to make the junction box 2' and the module 1' firmly bonded, such as Figure 1 However, since the side space of the component is generally only 6 to 15 mm, it is difficult to ensure the good quality rate of the junction box bonding by relying solely on structural adhesive. In addition, since the curing of structural adhesive takes more than 4 hours, the production process requires special fixtures or placement areas for positioning and temporary placement before curing to prevent the junction box from shifting or falling off, which affects the production efficiency to a certain extent. Utility Model Content

[0003] The utility model aims at the technical problems existing in the prior art and provides a BIPV photovoltaic module, which makes the connection between the junction box and the photovoltaic module more firmly, reduces the defective rate and improves the production efficiency.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a BIPV photovoltaic module, including a battery cell and a glass sheet respectively arranged on both sides of the battery cell, and an adhesive film is arranged between the glass sheet and the corresponding sides of the battery cell; it also includes a junction box, the junction box is provided with an external connection part and an internal embedded part, the internal embedded part is electrically connected to the battery cell and embedded between the two adhesive films, and the external connection part is exposed to the two adhesive films.

[0005] Furthermore, the embedded part includes two leads and a connecting piece, one end of the lead is electrically connected to the battery cell, and the other end is inserted into the connecting piece; both sides of the connecting piece are respectively bonded and connected to the adhesive film.

[0006] Furthermore, the total thickness of the two adhesive films minus the thickness of the connecting sheet is greater than or equal to 0.5 mm; and the thickness of the connecting sheet is greater than the thickness of the lead.

[0007] Furthermore, the lead extends along a first direction of the battery cell, and the connecting piece extends along a second direction of the battery cell and is perpendicular to the lead.

[0008] Furthermore, the embedded part is in sheet shape; the lead wire is made of copper or iron, and the connecting sheet is made of plastic.

[0009] Furthermore, the external connection portion includes a box body and two external wires, the box body is fixedly connected to the connecting piece and arranged along the second direction of the battery cell, and the external wires pass through the box body and are electrically connected to the corresponding leads.

[0010] Furthermore, a flip cover is hinged on the box body, and the flip cover is buckled with the box body.

[0011] Furthermore, the box body is block-shaped; the external wire is made of copper or iron, and the box body is made of plastic.

[0012] Furthermore, a dimension of the box body in the second direction of the battery cell is greater than a dimension of the connecting piece in the second direction of the battery cell.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The junction box in the utility model is provided with an external connection part and an internal embedding part, wherein the internal embedding part is electrically connected to the battery cell and embedded between the two adhesive films, and the external connection part is exposed from the two adhesive films, so that the junction box and the photovoltaic module form a whole, thereby making the combination between the two more firm, reducing the defective rate, and eliminating the curing time of the structural adhesive and the use of tooling and fixtures in the prior art, shortening the production time and improving production efficiency.

[0015] 2. In the present invention, the total thickness of the two adhesive films minus the thickness of the connecting sheet is greater than or equal to 0.5 mm, and the thickness of the connecting sheet is greater than the thickness of the lead wire to ensure that the adhesive film can completely wrap the embedded part to prevent the occurrence of adhesive deficiency and other undesirable phenomena.

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, a BIPV photovoltaic module of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the prior art;

[0018] Figure 2 It is an exploded schematic diagram of the utility model;

[0019] Figure 3 It is the front view of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the junction box and photovoltaic module of the utility model.

[0021] Figure 5 It is a side view of the utility model (exploded state);

[0022] Figure 6It is a top view of the utility model (exploded state);

[0023] In the figure: 1. battery cell; 2. glass sheet; 3. adhesive film; 4. junction box; 41. embedded part; 411. connecting piece; 412. lead; 42. external part; 421. external wire; 422. box body; 423. flip cover; 10. photovoltaic module. DETAILED DESCRIPTION

[0024] In the present utility model, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In the description, the orientation or position relationship indicated by "inside", "outside", "top", "bottom", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0025] In addition, in the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "equipped with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1-Figure 6 As shown, a BIPV photovoltaic module of the utility model includes a cell 1 and glass sheets 2 respectively arranged on both sides of the cell 1, and an adhesive film 3 is arranged between the glass sheet 2 and the corresponding sides of the cell 1. The utility model also includes a junction box 4, which is provided with an external connection part 42 and an internal embedding part 41, the internal embedding part 41 is electrically connected to the cell 1 and embedded between the two adhesive films 3, and the external connection part 42 is exposed to the two adhesive films 3, so that the junction box 4 and the photovoltaic module 10 are more firmly combined.

[0027] The embedded part 41 includes two leads 412 and a connecting piece 411. One end of the lead 412 is electrically connected to the battery cell 1, and the other end is inserted into the connecting piece 411. Both sides of the connecting piece 411 are bonded and connected to the adhesive film 3. The total thickness of the two adhesive films 3 minus the thickness of the connecting piece 411 is greater than or equal to 0.5 mm, and the thickness of the connecting piece 411 is greater than the thickness of the lead 412 to ensure that the adhesive film 3 can completely wrap the embedded part 41. The lead 412 extends along the first direction of the battery cell 1, and the connecting piece 411 extends along the second direction of the battery cell 1 and is perpendicular to the lead 412. Specifically, the first direction of the battery cell 1 is the length direction of the battery cell 1, and the second direction of the battery cell 1 is the width direction of the battery cell 1. The embedded part 41 is in a sheet shape. The lead 412 is made of copper or iron, and the connecting piece 411 is made of plastic.

[0028] The external connection part 42 includes a box body 422 and two external wires 421. The box body 422 is fixedly connected to the connecting piece 411 and arranged along the second direction of the battery cell 1. The external wires 421 are passed through the box body 422 and are electrically connected to the corresponding leads 412. A flip cover 423 is hinged on the box body 422, and the flip cover 423 is buckled with the box body 422 to facilitate the staff to operate the inside of the junction box 4. The box body 422 is block-shaped, the external wires 421 are made of copper or iron, and the box body 422 is made of plastic. The size of the box body 422 in the second direction of the battery cell 1 is larger than the size of the connecting piece 411 in the second direction of the battery cell 1.

[0029] The utility model provides a BIPV photovoltaic module, and its manufacturing process is as follows:

[0030] 1. Prepare the glass sheet 2, the battery sheet 1, the adhesive film 3 and the junction box 4. According to the structure and thickness of the embedded part 41 of the junction box 4, select an appropriate thickness of the adhesive film 3 to ensure that this part can be completely wrapped to prevent the occurrence of defects such as lack of adhesive. Specifically, the total thickness of the two adhesive films 3 minus the thickness of the embedded part 41 is greater than or equal to 0.5 mm.

[0031] 2. Dry the junction box 4. Since the junction box 4 is made of plastic materials such as PPO / PA, which have a certain degree of hygroscopicity, in order to prevent water vapor from seeping out and generating bubbles during the lamination process, a certain degree of drying is performed before lamination, which can effectively improve such bubble problems. Specifically, use a dryer to dry the junction box 4, set the temperature to 100-140°C, and set the baking time to 10-120 minutes. It is best to use it on the same day after baking. The unused junction box 4 can be sealed and stored in a sealed bag.

[0032] 3. Connect the junction box 4 and the cell 1, lay glass sheets 2 on both sides of the cell 1, and set adhesive films 3 between the glass sheets 2 and the corresponding sides of the cell 1, and the embedded part 41 of the junction box 4 is located between the two adhesive films 3 to form a photovoltaic module 10.

[0033] 4. A double-chamber laminator is used to laminate the photovoltaic module 10. During the lamination process, when the photovoltaic module 10 is located in the first chamber of the double-chamber laminator, the vacuuming time is increased by 30S to 200S compared with conventional photovoltaic modules, which can effectively remove the bubbles in the lamination process and also ensure that the adhesive film 3 has enough flow time to fill the boundary space of the embedded part 41 of the junction box 4. Specifically, when EVA / EPE / POE adhesive film 3 is used, the first chamber of the double-chamber laminator is set at a temperature of 120 to 140°C, the vacuuming time is 300 to 500s, and the pressurizing time is 100 to 300s. The second chamber of the double-chamber laminator is set at a temperature of 140 to 150°C, the vacuuming time is 10 to 60s, and the pressurizing time is 400 to 600s.

[0034] A BIPV photovoltaic module of the utility model embeds the embedded part 41 of the junction box between two adhesive films 3, so that the junction box 4 and the photovoltaic module 10 form a whole, thereby making the combination between the two more firmly, reducing the defective rate, and eliminating the curing time of the structural adhesive and the use of tooling fixtures in the prior art, shortening the production time and improving production efficiency.

[0035] The utility model provides a BIPV photovoltaic component, and the unrelated parts are the same as the existing technology or can be implemented by using the existing technology.

[0036] The above embodiments are only used to further illustrate a BIPV photovoltaic module of the utility model, but the utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. A BIPV photovoltaic module, comprising a cell and glass sheets respectively arranged on both sides of the cell, wherein an adhesive film is arranged between the glass sheet and the corresponding side of the cell; characterized in that: It also includes a junction box, which is provided with an external connection part and an internal embedding part, the internal embedding part is electrically connected to the battery cell and embedded between the two adhesive films, and the external connection part is exposed from the two adhesive films.

2. The BIPV photovoltaic module according to claim 1, characterized in that: The embedded part includes two leads and a connecting piece. One end of the lead is electrically connected to the battery cell, and the other end is inserted into the connecting piece. Both sides of the connecting piece are respectively bonded and connected to the adhesive film.

3. The BIPV photovoltaic module according to claim 2, characterized in that: The total thickness of the two adhesive films minus the thickness of the connecting sheet is greater than or equal to 0.5 mm; the thickness of the connecting sheet is greater than the thickness of the lead.

4. The BIPV photovoltaic module according to claim 2, characterized in that: The lead wires extend along a first direction of the battery cell, and the connecting piece extends along a second direction of the battery cell and is perpendicular to the lead wires.

5. The BIPV photovoltaic module according to claim 2, characterized in that: The embedded part is in sheet shape; the lead wire is made of copper or iron, and the connecting sheet is made of plastic.

6. The BIPV photovoltaic module according to claim 2, characterized in that: The external connection part includes a box body and two external wires. The box body is fixedly connected to the connecting piece and arranged along the second direction of the battery cell. The external wires pass through the box body and are electrically connected to the corresponding leads.

7. The BIPV photovoltaic module according to claim 6, characterized in that: A flip cover is hinged on the box body, and the flip cover is buckled with the box body.

8. The BIPV photovoltaic module according to claim 6, characterized in that: The box body is block-shaped; the external wire is made of copper or iron, and the box body is made of plastic.

9. The BIPV photovoltaic module according to claim 6, characterized in that: The size of the box body in the second direction of the battery cell is greater than the size of the connecting piece in the second direction of the battery cell.

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