A photovoltaic power semiconductor module and junction box assembly

Abstract

The utility model discloses a photovoltaic power semiconductor module and junction box subassembly, including diode, the both ends of diode are connected with first electrically conductive body and second electrically conductive body respectively, the first electrically conductive body is composed of multiple electrically conductive layers along the vertical direction distribution, the quality of adjacent two electrically conductive layers is not same, in this structure through the electrically conductive body who forms of the laminated setting of different material electrically conductive layer, such design utilizes the characteristic of copper excellent conductivity, guarantees when the demand of big current through, and combines the advantage of relatively cheap price of aluminum, effectively reduced the manufacturing cost of photovoltaic power semiconductor module, thereby in the cost saving while satisfied the current demand, improved the reliability and efficiency of photovoltaic system.

Description

Technical Field

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

[0002] Photovoltaic power semiconductor modules are an important component of photovoltaic modules, primarily used to improve the reliability and efficiency of photovoltaic systems. 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] Currently, photovoltaic power semiconductor modules all use copper as the conductor. Copper has excellent conductivity but is relatively expensive. Therefore, many solutions also use aluminum as the conductor in photovoltaic power semiconductor modules. Although aluminum is relatively cheaper, its conductivity is lower than that of copper. Therefore, when the required current is large, aluminum conductors cannot meet the requirements. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a photovoltaic power semiconductor module that can save costs while meeting current requirements.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a photovoltaic power semiconductor module, including a diode, with a first conductor and a second conductor respectively connected to the two ends of the diode. The first conductor is composed of multiple conductive layers distributed in a vertical direction, and the materials of adjacent conductive layers are different.

[0006] Furthermore, the second conductor consists of multiple conductive layers distributed along the vertical direction, with adjacent conductive layers made of different materials.

[0007] Furthermore, the first conductor and / or the second conductor includes a first conductive layer, a second conductive layer and a third conductive layer disposed sequentially from top to bottom;

[0008] Furthermore, the first and third conductive layers are copper conductive layers, and the second conductive layer is an aluminum conductive layer;

[0009] Alternatively, the first and third conductive layers may be aluminum conductive layers, and the second conductive layer may be a copper conductive layer.

[0010] Furthermore, the first conductor and / or the second conductor includes a first conductive layer and a second conductive layer disposed sequentially from top to bottom.

[0011] Furthermore, the first conductive layer is a copper conductive layer, and the second conductive layer is an aluminum conductive layer;

[0012] Alternatively, the first conductive layer may be an aluminum conductive layer, and the second conductive layer may be a copper conductive layer.

[0013] Furthermore, the diode is a chip with PN poles, the chip is disposed on a first electrical conductor, the lower surface of the chip is electrically connected to a first conductor, and it also includes interconnecting sheets, which are electrically connected to the upper surface of the chip and a second conductor respectively.

[0014] The interconnecting sheet is electrically connected to the conductive layer of the same material in the second conductor.

[0015] Furthermore, the diode is an axial diode, and the two ends of the axial diode are electrically connected to conductive layers of the same material as the first conductor and the second conductor, respectively.

[0016] This utility model discloses a photovoltaic junction box assembly, including the aforementioned photovoltaic power semiconductor module, comprising a box body and cables. The photovoltaic power semiconductor module is installed inside the box body, and the cables pass through the box body and are electrically connected to the photovoltaic power semiconductor module.

[0017] Furthermore, the cable is electrically connected to a conductive layer of the same material as the first conductor or the second conductor.

[0018] The beneficial effects of this utility model are as follows: In this structure, conductive layers of different materials are stacked to form a conductor. This design not only utilizes the excellent conductivity of copper to ensure that the current requirement can be met when a large current passes through, but also combines the advantage of the relatively low price of aluminum, effectively reducing the manufacturing cost of photovoltaic power semiconductor modules. Thus, while saving costs, the current requirement is met, and the reliability and efficiency of the photovoltaic system are improved. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first design scheme of the photovoltaic power semiconductor module according to an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the second design scheme of the photovoltaic power semiconductor module according to an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the structure of a photovoltaic power semiconductor module in an embodiment of this application, where the diode is a chip with a PN junction.

[0022] Figure 4 This is a schematic diagram of the structure of a photovoltaic power semiconductor module in an embodiment of this application when the diode is an axial diode.

[0023] Figure 5 This is a schematic diagram of the junction box assembly according to an embodiment of this application.

[0024] The components in the diagram are labeled as follows: chip 111, interconnect chip 112, axial diode 12, lead 121, first conductor 2, second conductor 3, first conductive layer 41, second conductive layer 42, third conductive layer 43, housing 5, and cable 6. Detailed Implementation

[0025] 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.

[0026] like Figure 1 and Figure 2 As shown, an embodiment of this application discloses a photovoltaic power semiconductor module, including a diode. The two ends of the diode are respectively connected to a first conductor 2 and a second conductor 3. The first conductor 2 is composed of multiple conductive layers distributed in a vertical direction, and the materials of adjacent conductive layers are different.

[0027] Specifically, in this structure, the first conductor 2 is designed as a multi-layer structure, and each conductive layer is made of different materials. For example, materials with good conductivity and relatively inexpensive materials can be combined together, so that the composite first conductor 2 can not only meet the requirements when a large current passes through, but also effectively reduce the manufacturing cost of photovoltaic power semiconductor modules.

[0028] In this embodiment, the second conductor 3 is composed of multiple conductive layers distributed along the vertical direction, and the materials of two adjacent conductive layers are different.

[0029] Specifically, in this structure, the second conductor 3 is also designed as a multi-layer structure, and each conductive layer uses a different material. For example, a material with good conductivity and a relatively inexpensive material can be combined together, so that the composite first conductor 2 can not only meet the requirements when a large current passes through, but also effectively reduce the manufacturing cost of the photovoltaic power semiconductor module.

[0030] Specifically, the first conductor 2 and the second conductor 3 have the following embodiments:

[0031] Example 1: As Figure 1 As shown, the first conductor 2 and / or the second conductor 3 include a first conductive layer 41, a second conductive layer 42 and a third conductive layer 43 arranged sequentially from top to bottom; the first conductive layer 41 and the third conductive layer 43 are copper conductive layers and the second conductive layer is an aluminum conductive layer, or the first conductive layer 41 and the third conductive layer 43 are aluminum conductive layers and the second conductive layer is a copper conductive layer.

[0032] In the above structural design, by setting the first conductive layer 41 and the third conductive layer 43 as copper conductive layers, and the middle second conductive layer 42 as an aluminum conductive layer, or vice versa, the excellent conductivity of copper is fully utilized to ensure that the requirements can be met when a large current passes through. At the same time, the relatively low price of aluminum is taken advantage of to reduce the overall manufacturing cost. This three-layer structure design achieves effective cost control while ensuring performance. When current passes through, the copper conductive layer is responsible for the main current conduction, while the aluminum conductive layer plays an auxiliary and cost-optimizing role. The two work together to meet the current requirements while saving costs, thereby improving the reliability and efficiency of the photovoltaic system.

[0033] Example 2: Figure 2 As shown, the first conductor 2 and / or the second conductor 3 include a first conductive layer 41 and a second conductive layer 42 arranged sequentially from top to bottom; the first conductive layer 41 is a copper conductive layer and the second conductive layer is an aluminum conductive layer; or the first conductive layer 41 is an aluminum conductive layer and the second conductive layer is a copper conductive layer.

[0034] In the design of the above structure, by using copper and aluminum respectively for the first conductive layer 41 and the second conductive layer 42, or vice versa, the advantages of copper's good conductivity—capable of stable conduction under high current—are utilized, while the lower cost of aluminum is taken advantage of, reducing the manufacturing cost of the photovoltaic power semiconductor module. This two-layer structure design effectively controls costs while meeting current requirements and improving the reliability and efficiency of the photovoltaic system. In practical applications, a structure with copper on top and aluminum on the bottom, or aluminum on top and copper on the bottom, can be selected according to specific needs to adapt to different applications.

[0035] In this embodiment, as Figure 3 As shown, the diode is a chip 111 with PN poles. The chip 111 is disposed on a first electrical conductor. The lower surface of the chip 111 is electrically connected to the first conductor 2. It also includes an interconnecting sheet 112. The interconnecting sheet 112 is electrically connected to the upper surface of the chip 111 and the second conductor 3 respectively. The interconnecting sheet 112 is electrically connected to a conductive layer of the same material in the second conductor 3.

[0036] Specifically, if the interconnect 112 is made of copper, it is electrically connected to the copper conductive layer; if the interconnect 112 is made of aluminum, it is electrically connected to the aluminum conductive layer.

[0037] In the above design, one side of chip 111 is connected to the first conductor 2, and the other side of chip 111 is electrically connected to the second conductor 3 via interconnect 112. Simultaneously, interconnect 112 is electrically connected to a conductive layer of the same material in the second conductor 3. This design helps reduce resistance and improve overall conductivity. In practical applications, this structure ensures stable and efficient current flow in the photovoltaic power semiconductor module, thereby improving the performance of the entire photovoltaic system.

[0038] In this embodiment, as Figure 4 As shown, the diode is an axial diode 12, and the two ends of the axial diode 12, the leads 121, are electrically connected to conductive layers of the same material as the first conductor 2 and the second conductor 3, respectively.

[0039] Specifically, if the material of the tube 121 is copper, it is electrically connected to the copper conductive layer; if the material of the tube 121 is aluminum, it is electrically connected to the aluminum conductive layer.

[0040] In the above structural design, the two ends 121 of the axial diode 12 are electrically connected to conductive layers of the same material in the first conductor 2 and the second conductor 3, respectively. This design ensures smooth current transmission. Since the material of the leads 121 is the same as that of the conductive layers, the contact resistance that may arise due to material differences is effectively reduced, thereby reducing energy loss and improving current transmission efficiency. This ensures the stable operation of the photovoltaic power semiconductor module.

[0041] This utility model also discloses a photovoltaic junction box assembly, including the photovoltaic power semiconductor module described above, including a box body 5 and a cable 6. The photovoltaic power semiconductor module is installed inside the box body 5, and the cable 6 passes through the box body 5 and is electrically connected to the photovoltaic power semiconductor module.

[0042] Specifically, the photovoltaic junction box assembly of this structure integrates the photovoltaic power semiconductor module inside the box 5, which not only effectively protects the module from external environmental factors such as moisture, dust and mechanical damage, but also simplifies the installation process and improves the overall reliability and maintenance convenience of the system through the convenient connection of the cable 6 to the external circuit.

[0043] In this embodiment, the cable 6 is electrically connected to a conductive layer of the same material as the first conductor 2 or the second conductor 3.

[0044] Specifically, when cable 6 is made of copper, it is electrically connected to the copper conductive layer in either the first conductor 2 or the second conductor 3; when cable 6 is made of aluminum, it is connected to the aluminum conductive layer. This design ensures that the connection between cable 6 and the conductor has the lowest possible contact resistance, thereby reducing energy loss during transmission. Through this precise material matching connection method, the photovoltaic junction box assembly can operate more efficiently.

[0045] 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 power semiconductor module, comprising a diode, wherein a first conductor (2) and a second conductor (3) are respectively connected to the two ends of the diode, characterized in that: The first conductor (2) is composed of multiple conductive layers distributed along the vertical direction, and the materials of two adjacent conductive layers are different.

2. The photovoltaic power semiconductor module as described in claim 1, characterized in that: The second conductor (3) is composed of multiple conductive layers distributed along the vertical direction, and the materials of two adjacent conductive layers are different.

3. The photovoltaic power semiconductor module as described in claim 2, characterized in that: The first conductor (2) and / or the second conductor (3) include a first conductive layer (41), a second conductive layer (42) and a third conductive layer (43) arranged sequentially from top to bottom.

4. The photovoltaic power semiconductor module as described in claim 3, characterized in that: The first conductive layer (41) and the third conductive layer (43) are copper conductive layers, and the second conductive layer is an aluminum conductive layer; Alternatively, the first conductive layer (41) and the third conductive layer (43) may be aluminum conductive layers, and the second conductive layer may be copper conductive layers.

5. The photovoltaic power semiconductor module as described in claim 2, characterized in that: The first conductor (2) and / or the second conductor (3) include a first conductive layer (41) and a second conductive layer (42) arranged sequentially from top to bottom.

6. The photovoltaic power semiconductor module as described in claim 5, characterized in that: The first conductive layer (41) is a copper conductive layer, and the second conductive layer is an aluminum conductive layer; Alternatively, the first conductive layer (41) may be an aluminum conductive layer, and the second conductive layer may be a copper conductive layer.

7. The photovoltaic power semiconductor module according to any one of claims 3 to 6, characterized in that: The diode is a chip (111) with PN poles. The chip (111) is disposed on a first electrical conductor. The lower surface of the chip (111) is electrically connected to the first conductor (2). It also includes an interconnecting piece (112). The interconnecting piece (112) is electrically connected to the upper surface of the chip (111) and the second conductor (3) respectively. The interconnecting sheet (112) is electrically connected to the conductive layer of the same material in the second conductor (3).

8. The photovoltaic power semiconductor module as described in claim 3 or 4, characterized in that: The diode is an axial diode (12), and the two ends of the axial diode (12) (121) are electrically connected to the conductive layers of the first conductor (2) and the second conductor (3) with the same material.

9. A photovoltaic junction box assembly, comprising the photovoltaic power semiconductor module as described in any one of claims 1-4, including a housing (5) and a cable (6), characterized in that: The photovoltaic power semiconductor module is installed inside the housing (5), and the cable (6) passes through the housing (5) and is electrically connected to the photovoltaic power semiconductor module.

10. The photovoltaic junction box assembly as described in claim 9, characterized in that: The cable (6) is electrically connected to a conductive layer of the same material as the first conductor (2) or the second conductor (3).

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