Jumper film pasting assembly structure

Abstract

The invention discloses a jumper film assembly structure, and relates to the field of jumper film pasting, the jumper film assembly structure comprises a photovoltaic cell assembly, the photovoltaic cell assembly comprises three cell strings, each cell string is composed of two adjacent cells, the number of the cell strings is three, a first jumper and a second jumper are installed at the positions of the cell strings, and the first jumper and the second jumper are connected with each other. A middle bus bar assembly is installed at the position of the battery piece string, a second lead-out wire hole and a first lead-out wire hole are formed in the intersection area of the middle bus bar assembly, the first jumper wire and the second jumper wire, and the first lead-out wire hole and the second lead-out wire hole serve as a positive electrode and a negative electrode respectively. According to the jumper film pasting assembly structure, a finished product packaging box can enter a container conveniently, the transportation efficiency can be guaranteed, jumper design exists between every two battery strings, an excellent typesetting process is achieved, the phenomenon of short circuit of battery pieces can be avoided during preparation, and the production efficiency is improved during subsequent film pasting. And the phenomenon of breakage of the back glass is avoided, and bubbles are also avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the jumper film field, in particular to a jumper film assembly structure. BACKGROUND

[0002] The existing solar photovoltaic module is characterized by being symmetrical in the length direction of the module, and the middle transverse bus bar collects the current on both sides and is connected in parallel with three bypass diodes (each diode is connected in parallel with two groups of string circuits on the left and right), and the left and right sides are respectively positive and negative lead-out; the battery strings are connected by the bus bar; the gap between the battery length strings generally adopts a secondary reflection technology (back glass glazing or back glass reflection film), so that the light irradiated from the front is reflected twice inside the front glass to improve the power of the module.

[0003] The existing conventional photovoltaic module generally has 6 strings (battery strings), and the even number of series circuits directly pass through the battery piece to flow and then flow into the middle bus bar. The existing new module circuit design is an odd number of series circuits, and in order to ensure the convenience of the connection of the junction box and the later installation of the module, a jumper is needed to meet the related circuit design.

[0004] The jumper is generally connected to the top and bottom bus bars at both ends in the length direction of the module, and is connected and fixed to the middle bus bar in the middle; there are two design positions for this line: the distance between the battery piece strings on both sides of the jumper is pulled apart, and the width of the module is increased; the existing module size is based on the design of a container cabinet, and after the width of the module is increased, the total height of the upper and lower two drags increases, which is not conducive to the entry of the module packaging box into the container, affecting packaging and transportation; the jumper design is not between every battery string, which has an impact on the module layout process; the width of the jumper is only about 4-6mm, and the length is more than 1.1m, which is extremely easy to cause deviation in the processes of laminating, vacuumizing, and hot melting of the adhesive film, affecting the appearance; in severe cases, it may cause short circuit by contacting the battery piece; The jumper is increased on the back of the original gap (1.5-2.5mm) area of the module battery piece, and the width of the module is not changed; the gap area between the battery piece strings is the back glass glazing area, and the glazing area is a low-stress position of the glass; the addition of insulating adhesive film and jumper bus bar in this area is extremely easy to cause the breakage of the back glass; the gap film technology is used to overlap the jumper, and the internal unevenness of the laminated part is easy to cause air bubbles and other defects, and in severe cases, it may also cause the breakage of the back glass.

[0005] Therefore, it is necessary to provide a jumper film assembly structure to solve the above problems. SUMMARY

[0006] The main purpose of the present application is to provide a jumper film assembly structure which can effectively solve the problems in the background art.

[0007] To achieve the above purpose, the technical scheme adopted by the present application is: A jumper wire film pasting assembly structure, comprising a photovoltaic cell assembly, the photovoltaic cell assembly comprising a cell piece string, the cell piece string being composed of two adjacent cell piece groups, the cell piece string having three strings in common, the cell piece string being provided with a jumper wire one and a jumper wire two, the cell piece string being provided with an intermediate busbar assembly, the intersection area of the intermediate busbar assembly, the jumper wire one and the jumper wire two being provided with a second lead-out wire hole and a first lead-out wire hole, the first lead-out wire hole and the second lead-out wire hole being divided into positive and negative poles.

[0008] Preferably, the intermediate busbar assembly intersects with the jumper wire one and the jumper wire two, the back of the jumper wire one and the jumper wire two being pasted with a vertical reflective film and a horizontal reflective film, the vertical reflective film being used for pasting the vertical jumper wire two and the first lead-out wire hole; the horizontal reflective film being used for pasting the horizontal jumper wire two and the first lead-out wire hole.

[0009] Preferably, the vertical reflective film and the horizontal reflective film comprise a reflective layer / tinned busbar, a PET isolation layer, a reflective layer / aluminum layer and an EVA adhesive film layer, the reflective layer / tinned busbar being used to achieve the film reflective effect by using the tinned layer reflective principle; the PET isolation layer being used to isolate the upper and lower metal conductive layers of the intermediate busbar assembly; the reflective layer / aluminum layer being used to increase the luminous intensity of the back, and the EVA adhesive film layer being used to pre-fix the back glass.

[0010] Preferably, one side of the bottom of the photovoltaic cell assembly is provided with a first edge busbar, and the other side of the bottom of the photovoltaic cell assembly is provided with a second edge busbar.

[0011] Preferably, the intermediate busbar assembly is overlapped with a film pasting jumper wire, the film pasting jumper wire is connected with an intermediate busbar assembly one, the intermediate busbar assembly one is connected with the jumper wire two and the jumper wire one, and the other side of the intermediate busbar assembly one is connected with an intermediate busbar assembly two.

[0012] Preferably, the intermediate busbar assembly intersects with the jumper wire one and the jumper wire two through a cross connection.

[0013] Preferably, the intermediate busbar assembly one is provided with a circuit module, and the lead-out parts of the jumper wire one and the jumper wire two are welded at the circuit module and electrically connected therewith.

[0014] Preferably, it further comprises a first jumper wire, a second jumper wire, a diode and an intermediate busbar, the intermediate busbar being an intermediate busbar assembly one, an intermediate busbar assembly two and an intermediate busbar assembly three, the first jumper wire being the jumper wire one, and the second jumper wire being the jumper wire two.

[0015] Preferably, the photovoltaic cell assembly is provided with a double-diode line box, the diodes are installed in the double-diode line box, the second jumper wire is in the starting state and is the working line in the normal power generation state of the photovoltaic cell assembly, the diodes are uniformly installed at the photovoltaic cell assembly, and the first jumper wire is started after the left diode is started.

[0016] Compared with the prior art, the present application provides a jumper wire film pasting assembly structure, which has the following beneficial effects: 1. The jumper wire film pasting assembly structure can integrate the jumper wire one 5, the jumper wire two 6, the middle busbar assembly three 23, the middle busbar assembly one 15, the middle busbar assembly two 16 and the vertical reflective film 12, facilitates unified design, and designs odd-numbered string circuit jumper wire design and even-numbered string circuit jumper wire design.

[0017] 2. The jumper wire film pasting assembly structure has simple and fast process layout, is beneficial to the packaging box of the finished product entering the container, can guarantee the transportation efficiency, and has the jumper wire design between each battery string, has a relatively excellent layout process, can avoid the phenomenon of battery piece short circuit during preparation, and cannot cause the phenomenon of back glass fracture and air bubbles during subsequent film pasting. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a circuit design schematic diagram of the odd-numbered string assembly of the present application; Figure 2 is a battery assembly schematic diagram of the jumper wire assembly of the present application; Figure 3 is a back surface schematic diagram of the jumper wire film pasting assembly of the present application; Figure 4 is a lead-out wire connection schematic diagram of the present application; Figure 5 is a structure schematic diagram of the vertical reflective film of the present application.

[0019] In the figure: 1, first jumper wire; 2, second jumper wire; 3, diode; 4, middle busbar; 5, jumper wire one; 6, jumper wire two; 7, first lead-out wire hole; 8, second lead-out wire hole; 9, middle busbar assembly; 10, first edge busbar; 11, second edge busbar; 12, vertical reflective film; 13, horizontal reflective film; 14, film pasting jumper wire; 15, middle busbar assembly one; 16, middle busbar assembly two; 17, reflective layer / tinned busbar; 18, PET isolation layer; 19, reflective layer / aluminum layer; 20, EVA adhesive film layer; 21, photovoltaic cell assembly; 22, battery piece string; 23, middle busbar assembly three. DETAILED DESCRIPTION

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] Example 1: like Figures 1-5 As shown, a jumper-attached film assembly structure includes a photovoltaic cell assembly 21, which includes cell strings 22, each consisting of two adjacent cells. There are three cell strings 22 in total. Jumper wire 1 5 and jumper wire 2 6 are installed at each cell string 22. A middle busbar assembly 9 is installed at each cell string 22. A second lead hole 8 and a first lead hole 7 are installed at the intersection of the middle busbar assembly 9, jumper wire 1 5, and jumper wire 2 6. The first lead hole 7 and the second lead hole 8 serve as the positive and negative electrodes, respectively. The middle busbar assembly 9 intersects with jumper wire 1 5 and jumper wire 2 6. Vertical anti-reflective film is attached to the back of jumper wire 1 5 and jumper wire 2 6. The vertical reflective film 12 and the horizontal reflective film 13 are used to apply film to the vertical jumper 6 and the first lead hole 7. The horizontal reflective film 13 is used to apply film to the horizontal jumper 6 and the first lead hole 7. The vertical reflective film 12 and the horizontal reflective film 13 include a reflective layer / tin-plated busbar 17, a PET isolation layer 18, a reflective layer / aluminum layer 19, and an EVA adhesive film layer 20. The reflective layer / tin-plated busbar 17 is used to achieve the reflective effect of the film by utilizing the reflective principle of the tin-plated layer. The PET isolation layer 18 is used to isolate the upper and lower metal conductive layers of the middle busbar assembly 9. The reflective layer / aluminum layer 19 is used to increase the light emission from the back side. EVA film layer 20 is used to pre-fix the back glass. A first edge busbar 10 is installed on one side of the bottom of the photovoltaic cell module 21, and a second edge busbar 11 is installed on the other side of the bottom of the photovoltaic cell module 21. A film-attached jumper 14 is connected to the middle busbar assembly 9. The film-attached jumper 14 is connected to the middle busbar assembly 15. The middle busbar assembly 15 is connected to the jumper 2 6 and the jumper 1 5. The other side of the middle busbar assembly 15 is connected to the middle busbar assembly 2 16. The middle busbar assembly 9 is connected to the jumper 1 5 and the jumper 2 6 through a cross-shaped connection. A circuit module is installed at the middle busbar assembly 15. The jumper 1 5 and the jumper 2 6 are connected to the middle busbar assembly 9. The lead-out portion of line 26 is soldered to the circuit module and electrically connected to it. It also includes a first jumper 1, a second jumper 2, a diode 3, and an intermediate busbar 4. The intermediate busbar 4 consists of intermediate busbar assembly 15, intermediate busbar assembly 26, and intermediate busbar assembly 33. The first jumper 1 is jumper 15, the second jumper 2 is jumper 26, and a dual diode junction box is installed at the photovoltaic cell module 21. The diode 3 is installed in the dual diode junction box. When the photovoltaic cell module 21 is in normal power generation state, the second jumper 2 is in the start state and is the working circuit. The diodes 3 are evenly installed at the photovoltaic cell module 21. After the left diode 3 is started, the first jumper 1 is started.

[0022] Example 2: like Figure 1 As shown, Figure 1 The diagram shows two jumpers, namely jumper 1 and jumper 2, which are connected in a cross shape at the middle busbar 4 in the vertical direction. The design of jumper 2 results in the two bypass diodes 3 being close together. In the later design of the junction box, there is a dual diode junction box in this area. The arrow in the diagram indicates the direction of current. When the photovoltaic module 21 is generating electricity normally, jumper 2 is in the start-up state and belongs to the working circuit. When the diode on the left side of the circuit is in the start-up state, jumper 1 is activated. Example 3: like Figure 2 As shown, the solar cell strings 22 are arranged in two groups, one on the left and one on the right, for a total of three strings. There are two jumpers between the three strings, jumper 1 5 and jumper 2 6. Jumper 1 5 and jumper 2 6 form two lead holes at the intersection area of ​​the middle busbar assembly 9. The second lead hole 8 and the middle busbar assembly 9 are the positive and negative terminals of the photovoltaic cell module 21. The first edge busbar 10 has two sections, one on the left and one on the right. The left section forms a T-shaped connection with jumper 1 5, and the right section forms an L-shaped connection.

[0023] Example 4: like Figure 3 As shown, compared with conventional film application components, the film application area and film distribution are the same. The difference is that integrated jumper film application requires welding and fixing of the first edge busbar 10 and the second edge busbar 11 to the middle busbar assembly 15, so the film application length is relatively long.

[0024] Example 5: like Figure 4 As shown, it is divided into three parts: left, middle, and right. From left to right, they are: middle busbar assembly 3 (23), middle busbar assembly 1 (15), and middle busbar assembly 2 (16). The middle busbar assembly 1 (15) has vertically attached jumpers 1 (5) and 2 (6). If the middle busbar assembly 1 (15) is integrated inside the junction box, the vertical jumpers 1 (5) and 2 (6) are divided into two sections and welded separately inside the junction box. If... Figure 4 In this method, the vertical jumper wire can be a single piece or divided into two sections for soldering.

[0025] Example 6: like Figure 5 As shown, its structure consists of four layers. The first layer is a welding layer, which is a reflective layer / tin-plated busbar 17. Due to the need to consider the relationship between thickness and current carrying capacity, it is widened and thinned to 0.15*8mm. The reflective effect of the film is achieved by utilizing the reflective principle of the tin-plated layer. The second layer is a PET isolation layer 18, which serves to isolate the metal conductive layers on the upper and lower sides in the middle. The third layer is a reflective layer / aluminum layer 19, which increases the power generation on the back. The last layer is an EVA adhesive film layer 20, which serves to pre-fix the back glass.

[0026] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations and modifications are intended to be included within the scope of the application as defined in the following claims and the equivalents thereof.

Claims

1. A jumper film-mounted module structure, comprising a photovoltaic cell module (21), characterized in that: The photovoltaic cell module (21) includes a cell string (22), which is composed of two adjacent cells. There are three cells in total. A jumper wire 1 (5) and a jumper wire 2 (6) are installed at the cell string (22). An intermediate busbar assembly (9) is installed at the cell string (22). A second lead hole (8) and a first lead hole (7) are installed at the intersection of the intermediate busbar assembly (9), jumper wire 1 (5), and jumper wire 2 (6). The first lead hole (7) and the second lead hole (8) serve as the positive and negative electrodes, respectively.

2. The jumper film assembly structure according to claim 1, characterized in that: The intermediate busbar assembly (9) intersects with jumper one (5) and jumper two (6). The back of jumper one (5) and jumper two (6) are covered with a vertical reflective film (12) and a horizontal reflective film (13). The vertical reflective film (12) is used to cover the vertical jumper two (6) and the first lead hole (7). The horizontal reflective film (13) is used to cover the horizontal jumper two (6) and the first lead hole (7).

3. The jumper film assembly structure according to claim 2, characterized in that: The vertical reflective film (12) and the horizontal reflective film (13) include a reflective layer / tin-plated busbar (17), a PET isolation layer (18), a reflective layer / aluminum layer (19), and an EVA film layer (20). The reflective layer / tin-plated busbar (17) is used to achieve the reflective effect of the film by utilizing the reflective principle of the tin-plated layer. The PET isolation layer (18) is used to isolate the upper and lower metal conductive layers of the middle busbar assembly (9). The reflective layer / aluminum layer (19) is used to increase the amount of light emitted from the back. The EVA film layer (20) is used to pre-fix the back glass.

4. The jumper film assembly structure according to claim 1, characterized in that: A first edge busbar (10) is installed on one side of the bottom of the photovoltaic cell module (21), and a second edge busbar (11) is installed on the other side of the bottom of the photovoltaic cell module (21).

5. The jumper film assembly structure according to claim 4, characterized in that: A film-attached jumper (14) is attached to the intermediate busbar assembly (9). The film-attached jumper (14) is connected to an intermediate busbar assembly one (15). The intermediate busbar assembly one (15) is connected to jumper two (6) and jumper one (5). The other side of the intermediate busbar assembly one (15) is connected to intermediate busbar assembly two (16).

6. The jumper film assembly structure according to claim 5, characterized in that: The intermediate busbar assembly (9) is connected to jumper one (5) and jumper two (6) via a cross-shaped connection.

7. The jumper film assembly structure according to claim 6, characterized in that: A circuit module is installed at the intermediate busbar assembly one (15), and the lead-out parts of jumper one (5) and jumper two (6) are soldered to the circuit module and electrically connected to it.

8. The jumper film assembly structure according to claim 1, characterized in that: It also includes a first jumper (1), a second jumper (2), a diode (3) and an intermediate busbar (4), wherein the intermediate busbar (4) is an intermediate busbar assembly one (15), an intermediate busbar assembly two (16) and an intermediate busbar assembly three (23), the first jumper (1) is jumper one (5), and the second jumper (2) is jumper two (6).

9. The jumper film assembly structure according to claim 8, characterized in that: A dual diode junction box is installed at the photovoltaic cell module (21). The diode (3) is installed in the dual diode junction box. When the photovoltaic cell module (21) is in normal power generation state, the second jumper (2) is in the start state and is the working line. The diodes (3) are evenly installed at the photovoltaic cell module (21). After the left diode (3) is started, the first jumper (1) is started.

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