Photovoltaic bypass module, junction box and junction box assembly

Abstract

The utility model discloses a photovoltaic bypass module, junction box and junction box assembly, including first conductor, second conductor, chip and metal interconnection piece, the chip is provided on the first conductor, one end of the metal interconnection piece is connected with the chip, the other end is connected with the second conductor, also including packaging body, the packaging body is arranged outside the chip and the metal interconnection sheet, so that the chip and the metal interconnection sheet are packaged in the packaging body, one end of the third electric conductor is electrically connected with one end of the first electric conductor, one end of the fourth electric conductor is electrically connected with one end of the second electric conductor, and the other end of the third electric conductor is electrically connected with the other end of the second electric conductor. According to the structure, through the arrangement of the third electric conductor and the fourth electric conductor, the adaptability of the photovoltaic module is enhanced, that is, the sizes of the third electric conductor and the fourth electric conductor can be directly modified according to the size of the junction box, and the sizes of the first electric conductor and the second electric conductor which are directly and electrically connected with the chip do not need to be modified.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic junction boxes, and in particular to a photovoltaic bypass module, junction box, and junction box assembly. Background Technology

[0002] A photovoltaic bypass module is an important component of a photovoltaic module, primarily used to improve the reliability and efficiency of the photovoltaic system. When a cell in a photovoltaic string experiences current mismatch due to shading, damage, or performance degradation, the bypass module provides a low-resistance bypass path for that cell, allowing current to flow around the faulty cell. This reduces hot spot effects, protects other normally functioning cells from damage, and maintains the overall power generation efficiency of the photovoltaic module.

[0003] These modules typically contain one or more bypass protection modules, designed to conduct under specific conditions to bypass affected battery cells. In recent years, with technological advancements, the design of bypass modules has increasingly focused on heat dissipation performance and miniaturization to meet the application requirements of high-power photovoltaic modules.

[0004] Currently, the structure of bypass protection modules is mostly as disclosed in CN220234626U, with a PN-level chip acting as a diode, and two conductors fixedly electrically connected to two sides of the chip to act as diode pins. During application, the chip generates a lot of heat, so the conductors also have a heat dissipation function. In order to ensure that the diode is not burned out, the structure and size of the conductors have certain requirements.

[0005] As mentioned in CN220234626U, the two conductors of the current bypass protection module are rectangular, and the busbar perforation is opened on both sides of the package. When the photovoltaic bypass module is working, the chip inside the package will generate a lot of heat. This heat will be dissipated through the two conductors. The busbar perforation is very close to the chip, and the heat is very high here. However, there is no conductive material here, so the heat will bypass the busbar perforation and diffuse from the side, resulting in very slow heat dissipation and easy chip burnout.

[0006] At the same time, in the current structure, the area and size of the conductor are fixed. When the size and structure of the junction box change, the connection structure of diodes and conductors needs to be redesigned, which is very inconvenient. Utility Model Content

[0007] The technical problem solved by this utility model is to provide a photovoltaic bypass module that has strong adaptability and can be used in junction boxes of different sizes and structures.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a photovoltaic bypass module, including a first conductor, a second conductor, a chip and a metal interconnect piece, wherein the chip is disposed on the first conductor, one end of the metal interconnect piece is connected to the chip, and the other end of the metal interconnect piece is connected to the second conductor, and further includes an encapsulation body, wherein the encapsulation body is disposed outside the chip and the metal interconnect piece, such that the chip and the metal interconnect piece are encapsulated in the encapsulation body, the end of the first conductor away from the second conductor is located outside the encapsulation body, and the end of the second conductor away from the first conductor is located outside the encapsulation body;

[0009] It also includes a third conductor and a fourth conductor, one end of the third conductor being electrically connected to the end of the first conductor away from the second conductor, and one end of the fourth conductor being electrically connected to the end of the second conductor away from the first conductor.

[0010] Furthermore, the third and fourth conductors are respectively provided with a first folded edge structure and a second folded edge structure on the side facing the first and second conductors. The end of the first conductor away from the second conductor is electrically connected to the first folded edge structure, and the end of the second conductor away from the first conductor is electrically connected to the second folded edge structure.

[0011] Furthermore, it also includes a first busbar perforation and a second busbar perforation, such that the first busbar passes through the first busbar perforation and is electrically connected to the third conductor, and the second busbar passes through the second busbar perforation and is electrically connected to the fourth conductor.

[0012] Furthermore, the first busbar perforation and the second busbar perforation are located on the upper or lower side of the package body along the extension line of the X-axis direction.

[0013] Furthermore, a groove is formed between the third conductor, the package body, and the fourth conductor for the busbar to pass through. The groove is a through hole for the first busbar and a through hole for the second busbar. The first busbar and the second busbar pass through the groove and are electrically connected to the third conductor and the fourth conductor, respectively.

[0014] Furthermore, the third conductor has a first through hole for the first busbar to pass through, and the fourth conductor has a second through hole for the second busbar to pass through. The first through hole is the first busbar through hole, and the second through hole is the second busbar through hole. The first busbar and the second busbar pass through the first through hole and the second through hole respectively and are electrically connected to the third conductor and the fourth conductor.

[0015] Furthermore, a bump is provided below one end of the metal interconnect sheet, and the bump abuts against the upper surface of the chip. The end of the metal interconnect sheet closer to the first bump is the first end, and the end of the metal interconnect sheet farther from the first bump is the second end. The first end is connected to the chip, and the second end is electrically connected to the second conductor. The first end and the second end are connected by an arc-shaped bend.

[0016] This utility model also discloses a junction box, including the photovoltaic bypass module described above, including a box body, a top cover provided on the box body, the box body and the top cover forming an accommodating space, the photovoltaic bypass module being disposed in the accommodating space, and a through hole provided at the bottom of the box body for the busbar to pass through, so that the first busbar and the second busbar pass through the through hole, the first busbar through hole and the second busbar through hole respectively, and are connected to the third conductor and the fourth conductor.

[0017] Furthermore, guide portions are provided on both sides of the through hole, extending obliquely along the bottom outer surface towards the receiving space, and the spacing between the guide portions gradually decreases from the bottom surface of the box to the receiving space.

[0018] The present invention also discloses a junction box assembly, including the junction box described above, wherein there are three junction boxes, namely a left junction box, a middle junction box and a right junction box, and further including a left cable and a right cable, wherein the left cable is electrically connected to a fourth conductor in the left junction box, and the right cable is electrically connected to a third conductor in the right junction box.

[0019] The beneficial effects of this utility model are:

[0020] 1. The structure enhances the adaptability of the photovoltaic module by setting the third and fourth conductors. That is, the size of the third and fourth conductors can be directly modified according to the size of the junction box without modifying the size of the first and second conductors that are directly electrically connected to the chip.

[0021] 2. In this structure, the first busbar via and the second busbar via are located far away from the chip position, that is, no busbar vias are provided on the first conductor and the second conductor, which can accelerate the heat dissipation of the chip and improve the uniformity of heat dissipation.

[0022] 3. In this structure, the groove allows the first and second busbars to pass directly through the groove and connect with the third and fourth conductors, thereby reducing the need for perforations. Attached Figure Description

[0023] Figure 1 This is an exploded view of a photovoltaic bypass module according to an embodiment of this application.

[0024] Figure 2This is a schematic diagram of a photovoltaic bypass module according to an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of a photovoltaic bypass module according to an embodiment of the present application, including a first folded edge structure and a second folded edge structure.

[0026] Figure 4 This is a schematic diagram of one type of busbar perforation structure of a photovoltaic bypass module according to an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of another busbar perforation structure of a photovoltaic bypass module according to an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of a junction box according to an embodiment of this application.

[0029] Figure 7 This is a schematic diagram of the bottom structure of a junction box according to an embodiment of this application.

[0030] Figure 8 This is a schematic diagram of the bottom structure of a junction box according to an embodiment of this application.

[0031] Figure 9 This is a schematic diagram of the bottom structure of a junction box according to an embodiment of this application.

[0032] Figure 10 This is a schematic diagram of the junction box assembly according to an embodiment of this application.

[0033] Figure 11 This is a schematic diagram of the structure of the metal interconnect sheet of a photovoltaic bypass module according to an embodiment of this application.

[0034] The components in the diagram are labeled as follows: First conductor 1, Second conductor 2, Chip 3, Metal interconnect 4, Bump 41, First end 4a, Second end 4b, Arc-shaped bend 42, Package 5, Left cable 501, Right cable 502, Third conductor 6, First busbar perforation 61, First folded edge structure 62, Fourth conductor 7, Second busbar perforation 71, Second folded edge structure 72, Groove 8, First busbar 91, Second busbar 92, Box 10, Top cover 20, Accommodation space 30, Through hole 101, Guide part 102. Detailed Implementation

[0035] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0036] like Figure 1 and Figure 2As shown, an embodiment of this application discloses a photovoltaic bypass module, including a first conductor 1, a second conductor 2, a chip 3, and a metal interconnect. The chip 3 is disposed on the first conductor 1, one end of the metal interconnect is connected to the chip 3, and the other end of the metal interconnect is connected to the second conductor 2. The module also includes a package 5, which is disposed outside the chip 3 and the metal interconnect, such that the chip 3 and the metal interconnect are encapsulated in the package 5. The end of the first conductor 1 away from the second conductor 2 is located outside the package 5, and the end of the second conductor 2 away from the first conductor 1 is located outside the package 5.

[0037] It also includes a third conductor 6 and a fourth conductor 7, one end of the third conductor 6 being electrically connected to the end of the first conductor 1 away from the second conductor 2, and one end of the fourth conductor 7 being electrically connected to the end of the second conductor 2 away from the first conductor 1.

[0038] Specifically, during use, the configuration of the third conductor 6 and the fourth conductor 7 enhances the adaptability of the photovoltaic module. The size and shape of the third conductor 6 and the fourth conductor 7 can be directly modified during the design process according to the size of the junction box, without having to modify the size of the first conductor 1 and the second conductor 2 that are directly electrically connected to the chip 3.

[0039] Meanwhile, since the first conductor 1 and the third conductor 6 are directly connected, and the second conductor 2 and the fourth conductor 7 are directly connected, the third conductor 6 and the fourth conductor 7 can be used to dissipate heat from the chip 3. That is, when designing the first conductor 1 and the second conductor 2, only their conductivity needs to be considered, and their heat dissipation does not need to be considered. Therefore, the first conductor 1 and the second conductor 2 can be designed to be smaller, and their heat dissipation does not need to be considered, thereby reducing the volume of the package 5.

[0040] In this embodiment, as Figure 3 As shown, the third conductor 6 and the fourth conductor 7 are respectively provided with a first folded edge structure 62 and a second folded edge structure 72 on the side facing the first conductor 1 and the second conductor 2. The end of the first conductor 1 away from the second conductor 2 is electrically connected to the first folded edge structure 62, and the end of the second conductor 2 away from the first conductor 1 is electrically connected to the second folded edge structure 72.

[0041] Specifically, in the above structure, the first folding structure 62 is set at an angle to the third conductor 6, and the second folding structure 72 is set at an angle to the fourth conductor 7. The specific bending angle can be set according to the actual situation, so that when the first conductor 1 and the first folding mechanism are connected, the tilt angle of the first conductor 1 is adapted to the first folding mechanism. When the second conductor 2 and the second folding mechanism are connected, the tilt angle of the second conductor 2 is adapted to the second folding mechanism. This allows the chip 3 connected to the first conductor 1 and the second conductor 2 to be placed tilted or vertically, thereby reducing the size of the junction box and increasing the adaptability of the junction box.

[0042] In this embodiment, a first busbar perforation 61 and a second busbar perforation 71 are also included, such that the external first busbar 91 passes through the first busbar perforation 61 and is electrically connected to the third conductor 6, and the second busbar 92 passes through the second busbar perforation 71 and is electrically connected to the fourth conductor 7.

[0043] Specifically, in this structure, the first busbar 91 and the third conductor 6 are connected, and the second busbar 92 is connected to the fourth conductor 7, thereby setting the busbar away from the chip 3, which can accelerate the heat dissipation of the chip 3 and improve the uniformity of heat dissipation of the chip 3.

[0044] In this embodiment, the first busbar perforation 61 and the second busbar perforation 71 are located on the upper or lower side of the extension line of the package body 5 along the X-axis direction.

[0045] Specifically, when chip 3 dissipates heat, the heat can be directly dissipated from the positions of the first conductor 1, the second conductor 2, the third conductor 6, and the fourth conductor 7 located along the X-axis extension of the package 5, without needing to bypass the busbar. Therefore, in this structure, by biasing the first busbar through-hole 61 and the second busbar through-hole 71, chip 3 is moved away from the busbar connection area, thereby accelerating heat dissipation of chip 3 and improving the uniformity of heat dissipation.

[0046] Specifically, the first busbar perforation 61 and the second busbar perforation 71 can be configured in various ways. The following are two specific embodiments:

[0047] Example 1: As Figure 4 As shown, a groove 8 is formed between the third conductor 6, the package 5 and the fourth conductor 7 for the busbar to pass through. The groove 8 is the first busbar through hole 61 and the second busbar through hole 71. The first busbar 91 and the second busbar 92 pass through the groove 8 and are electrically connected to the third conductor 6 and the fourth conductor 7 respectively.

[0048] Specifically, in this structure, the groove 8 allows the first busbar 91 and the second busbar 92 to directly pass through the groove 8 and connect to the third conductor 6 and the fourth conductor 7, thus eliminating the need for additional through holes. This also reduces the need for through hole construction on the third conductor 6 and the fourth conductor 7, and also reduces the obstruction to heat dissipation of the chip 3.

[0049] Example 2: Figure 5 As shown, the third conductor 6 has a first through hole for the first busbar 91 to pass through, and the fourth conductor 7 has a second through hole for the second busbar 92 to pass through. The first through hole is the first busbar through hole 61, and the second through hole is the second busbar through hole 71. The first busbar 91 and the second busbar 92 pass through the first through hole and the second through hole respectively and are electrically connected to the third conductor 6 and the fourth conductor 7.

[0050] In the above structure, the first and second through holes can be used to position the first busbar 91 and the second busbar 92, while also reducing the obstruction to heat dissipation of the chip 3.

[0051] In this embodiment, as Figure 11 As shown, a bump 41 is provided below one end of the metal interconnect 4. The bump 41 abuts against the upper surface of the chip 3. The end of the metal interconnect 4 near the first bump 41 is the first end 4a, and the end of the metal interconnect 4 away from the first bump 41 is the second end 4b. The first end 4a is connected to the chip 3, and the second end 4b is electrically connected to the second conductor 2. The first end 4a and the second end 4b are connected by an arc-shaped bend 42.

[0052] Specifically, the first end 4a and the second end 4b in this structure are connected by an arc-shaped bend 42, so that the first end 4a can be higher than the second end 4b. That is, the position where the first end 4a is higher than the second end 4b can be used to accommodate the chip 3, so that the first end 4a and the second end 4b can be horizontal, thereby making the connection between the first end 4a and the second end 4b and the first conductor 1 and the second conductor 2 more stable and firm.

[0053] This utility model also discloses a junction box, such as Figures 6 to 9 As shown, the photovoltaic bypass module described above includes a housing 10, with a top cover 20 on the housing 10. The housing 10 and the top cover 20 form a receiving space 30, in which the photovoltaic bypass module is disposed. The bottom of the housing 10 is provided with a through hole 101 for the busbars to pass through, so that the first busbar 91 and the second busbar 92 pass through the through hole 101, the first busbar through hole 61 and the second busbar through hole 71 respectively, and are connected to the third conductor 6 and the fourth conductor 7.

[0054] Specifically, one or two through holes 101 can be provided in this structure. When one through hole 101 is provided, the first busbar 91 and the second busbar 92 pass through the through hole 101 at the same time, and then pass through the first busbar through hole 61 and the second busbar through hole 71 and are connected to the third conductor 6 and the fourth conductor 7. When two through holes 101 are provided, the first busbar 91 and the second busbar 92 each pass through one of the through holes, and then pass through the first busbar through hole 61 and the second busbar through hole 71 respectively and are connected to the third conductor 6 and the fourth conductor 7.

[0055] In this structure, a through hole is provided at the bottom of the box 10, which allows the first busbar 91 and the second busbar 92 to be easily connected to the third conductor 6 and the fourth conductor 7, thereby improving the installation efficiency of the first busbar 91 and the second busbar 92.

[0056] In this embodiment, as Figures 6 to 9 As shown, guide portions 102 are respectively provided on both sides of the through hole 101, extending obliquely along the bottom outer surface towards the receiving space 30. The spacing between the guide portions 102 gradually decreases from the bottom surface of the box 10 towards the receiving space 30.

[0057] Specifically, in this structure, the guide part 102 can guide the installation of the first busbar 91 and the second busbar 92, so that the first busbar 91 and the second busbar 92 can be smoothly inserted into the through hole 101 without special alignment.

[0058] This utility model also discloses a junction box assembly, such as Figure 10 As shown, the device includes the aforementioned junction boxes, comprising three junction boxes: a left junction box, a middle junction box, and a right junction box. It also includes a left cable 501 and a right cable 502. The left cable 501 is electrically connected to the fourth conductor 7 in the left junction box, and the right cable 502 is electrically connected to the third conductor 6 in the right junction box.

[0059] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A photovoltaic bypass module, characterized in that: The device includes a first conductor (1), a second conductor (2), a chip (3), and a metal interconnect. The chip (3) is disposed on the first conductor (1). One end of the metal interconnect is connected to the chip (3), and the other end of the metal interconnect is connected to the second conductor (2). The device also includes a package (5), which is disposed outside the chip (3) and the metal interconnect, so that the chip (3) and the metal interconnect are encapsulated in the package (5). The end of the first conductor (1) away from the second conductor (2) is located outside the package (5), and the end of the second conductor (2) away from the first conductor (1) is located outside the package (5). It also includes a third conductor (6) and a fourth conductor (7), one end of the third conductor (6) being electrically connected to the end of the first conductor (1) away from the second conductor (2), and one end of the fourth conductor (7) being electrically connected to the end of the second conductor (2) away from the first conductor (1).

2. A photovoltaic bypass module as described in claim 1, characterized in that: The third conductor (6) and the fourth conductor (7) are respectively provided with a first folded edge structure (62) and a second folded edge structure (72) on the side facing the first conductor (1) and the second conductor (2). The end of the first conductor (1) away from the second conductor (2) is electrically connected to the first folded edge structure (62), and the end of the second conductor (2) away from the first conductor (1) is electrically connected to the second folded edge structure (72).

3. A photovoltaic bypass module as described in claim 1, characterized in that: It also includes a first busbar perforation (61) and a second busbar perforation (71), such that the first busbar (91) passes through the first busbar perforation (61) and is electrically connected to the third conductor (6), and the second busbar (92) passes through the second busbar perforation (71) and is electrically connected to the fourth conductor (7).

4. A photovoltaic bypass module as described in claim 3, characterized in that: The first busbar perforation (61) and the second busbar perforation (71) are located on the upper or lower side of the package body (5) along the X-axis extension line.

5. A photovoltaic bypass module as described in claim 3, characterized in that: A groove (8) for passing through the busbar is formed between the third conductor (6), the package (5) and the fourth conductor (7). The groove (8) is the first busbar through hole (61) and the second busbar through hole (71). The first busbar (91) and the second busbar (92) pass through the groove (8) and are electrically connected to the third conductor (6) and the fourth conductor (7) respectively.

6. A photovoltaic bypass module as described in claim 3, characterized in that: The third conductor (6) has a first through hole for the first busbar (91) to pass through, and the fourth conductor (7) has a second through hole for the second busbar (92) to pass through. The first through hole is the first busbar through hole (61), and the second through hole is the second busbar through hole (71). The first busbar (91) and the second busbar (92) pass through the first through hole and the second through hole respectively and are electrically connected to the third conductor (6) and the fourth conductor (7).

7. A photovoltaic bypass module as described in claim 1, characterized in that: A bump (41) is provided below one end of the metal interconnect sheet (4). The bump (41) abuts against the upper surface of the chip (3). The end of the metal interconnect sheet (4) closer to the first bump (41) is the first end (4a), and the end of the metal interconnect sheet (4) away from the first bump (41) is the second end (4b). The first end (4a) is connected to the chip (3), and the second end (4b) is electrically connected to the second conductor (2). The first end (4a) and the second end (4b) are connected by an arc-shaped bend (42).

8. A junction box comprising the photovoltaic bypass module according to any one of claims 1 to 7, characterized in that: The device includes a housing (10) with a top cover (20) on it. The housing (10) and the top cover (20) form a receiving space (30). The photovoltaic bypass module is disposed in the receiving space (30). The bottom of the housing (10) is provided with a through hole (101) for the busbar to pass through, so that the first busbar (91) and the second busbar (92) pass through the through hole (101), the first busbar through hole (61), and the second busbar through hole (71) respectively and are connected to the third conductor (6) and the fourth conductor (7).

9. The junction box as described in claim 8, characterized in that: The through hole (101) is provided with guide portions (102) on both sides, which extend obliquely along the bottom outer surface towards the receiving space (30). The spacing of the guide portions (102) gradually decreases from the bottom surface of the box (10) to the receiving space (30).

10. A junction box assembly comprising the junction box of claim 8, characterized in that: There are three junction boxes: a left junction box, a middle junction box, and a right junction box. The junction boxes also include a left cable (501) and a right cable (502). The left cable (501) is electrically connected to the fourth conductor (7) in the left junction box, and the right cable (502) is electrically connected to the third conductor (6) in the right junction box.

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