Anti-corrosion copper-aluminum terminal photovoltaic flexible connector

Abstract

The invention discloses an anti-corrosion copper-aluminum terminal photovoltaic flexible connector, and relates to the field of photovoltaic technology. Comprising a female head terminal, the front end of which is provided with a jack; the conductive ring sleeve is fixedly arranged in the jack; a plug is arranged at the front end of the male head terminal, and the plug is fixedly arranged in the conductive ring sleeve in a pluggable mode; and the copper-aluminum transition terminal is detachably and fixedly arranged at the tail end of the female head terminal and / or the tail end of the male head terminal and is used for fixedly connecting the female head terminal and the aluminum wire and / or the male head terminal and the aluminum wire. Specifically, the end face of the tail end of the female head terminal and / or the end face of the tail end of the male head terminal are / is a plane. Specifically, the copper-aluminum transition terminal comprises a copper layer and an aluminum layer which are fixedly connected in sequence from inside to outside. According to the invention, the problems of voltage drop and heating caused by high contact resistance and high electrochemical corrosion rate at the copper-aluminum joint in the photovoltaic power station system are effectively solved, and the safety and stability of the photovoltaic power station system are improved.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic technology, and in particular to an improved structure of an anti-corrosion copper-aluminum terminal photovoltaic flexible connector. Background Art

[0002] A large number of cables are used in photovoltaic power station systems. The cables used in traditional photovoltaic systems are all copper core wires, which occupy precious copper resources and are relatively expensive to use, which to some extent affects the popularity of photovoltaic systems. However, aluminum resources are extremely abundant on the earth, and the cost of aluminum wires is much lower than that of copper wires and they are widely used in many fields. When connecting the photovoltaic power station component array to the junction box and inverter, 6mm 2 Aluminum core cable replaces 4mm 2 For copper core photovoltaic cables, aluminum wires can save 30% to 40% of the cost compared to copper wires. According to the cost of copper and aluminum materials, it can save about 1.1 yuan per meter. According to the 1GW photovoltaic power station project, the cable used is about 10 million to 15 million meters, and the cost savings are about 11 million to 15 million yuan, which is a considerable benefit. Therefore, how to design a safe and reliable photovoltaic connector that can be directly used in the photovoltaic power station system is a technical problem that needs to be solved urgently. Summary of the invention

[0003] In view of the above problems, the present invention provides a corrosion-resistant copper-aluminum terminal photovoltaic flexible connector which not only maintains the mechanical elasticity and electrical properties of the original copper device, but also can easily connect aluminum cables, thereby greatly reducing the construction and maintenance costs of power stations.

[0004] The technical solution of the present invention is: A corrosion-resistant copper-aluminum terminal photovoltaic flexible connector, comprising: Female terminal with a jack at the front; A conductive ring sleeve, fixedly disposed in the jack; A male terminal, with a plug provided at the front end, the plug being pluggable and fixedly arranged in the conductive ring sleeve; The copper-aluminum transition terminal is detachably fixedly arranged at the tail end of the female terminal and / or the tail end of the male terminal, and is used to fixedly connect the female terminal and the aluminum wire and / or the male terminal and the aluminum wire.

[0005] Specifically, the end surface of the rear end of the female terminal and / or the end surface of the rear end of the male terminal are respectively in the form of a plane.

[0006] Specifically, the copper-aluminum transition terminal includes a copper layer and an aluminum layer which are fixedly connected in sequence from the inside to the outside.

[0007] Specifically, the copper-aluminum transition terminal has a ring-shaped structure.

[0008] Specifically, a plurality of hollow portions are provided on the circumferential surface of the copper-aluminum transition terminal.

[0009] Specifically, a stopper portion fixedly connected to the copper-aluminum transition terminal is provided on the outer side of the hollow portion, and the female terminal or the male terminal is fixed in the corresponding positive electrode body or the negative electrode body through the stopper portion.

[0010] Specifically, a detachably fixed positive electrode nut is provided at the tail end of the positive electrode body; the aluminum wire extends from the positive electrode nut and sequentially passes through the positive electrode inner claw and the positive electrode sealing ring into the positive electrode body, and the positive electrode nut is tightened to seal and fix the aluminum wire on the positive electrode body.

[0011] Specifically, a detachably fixed negative electrode nut is provided at the tail end of the negative electrode body; the aluminum wire extends from the negative electrode nut and sequentially passes through the negative electrode inner claw and the negative electrode sealing ring into the negative electrode body, and the negative electrode nut is tightened to seal and fix the aluminum wire on the negative electrode body.

[0012] Specifically, a groove for fixing the copper-aluminum transition terminal is provided at the tail end of the female terminal and the end of the aluminum wire.

[0013] Specifically, a second groove for fixing the copper-aluminum transition terminal is provided at the tail end of the male terminal and the end of the aluminum wire.

[0014] The present invention comprises a female terminal and a male terminal; the male terminal is pluggable and fixedly arranged on the female terminal through a conductive ring sleeve in the female terminal; the female terminal and the male terminal are fixedly connected to the aluminum wire through a copper-aluminum transition terminal respectively. The copper-aluminum transition terminal comprises a copper layer and an aluminum layer fixedly connected in sequence from the inside to the outside, which effectively solves the problem of electrochemical corrosion, increased contact resistance, voltage drop and heating at the copper-aluminum connection in the photovoltaic power station system, and improves the safety and stability of the photovoltaic power station system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the positive electrode body; Figure 3 It is a schematic diagram of the internal structure of the positive electrode body; Figure 4 It is a schematic diagram of the internal structure of the positive electrode body; Figure 5 It is a three-dimensional structural diagram of the connection state of the female terminal and the male terminal; Figure 6 This is a schematic diagram of the three-dimensional structure of the copper-aluminum transition terminal; Figure 7 2. It is a schematic diagram of the three-dimensional structure of the conductive ring sleeve; Figure 8This is the connection status of the aluminum wire and the female terminal. Figure 1 ; Fig. 9 This is the connection status of the aluminum wire and the female terminal. Figure 2 ; Fig.10 This is the connection status of the aluminum wire and the female terminal. Figure 3 ; Fig.11 This is the connection status of the aluminum wire and the female terminal. Figure 4 ; Fig.12 This is the connection status of the aluminum wire and the female terminal. Figure 5 ; In the figure, 100 is a female terminal, 110 is a conductive ring, 200 is the male terminal, 300 is the copper-aluminum transition terminal, 310 is the hollow part, 320 is the stop part, 400 is the positive electrode body, 410 is the positive electrode nut, 420 is the positive electrode inner claw, 430 is the positive electrode sealing ring, 500 is the negative electrode body, 510 is the negative electrode nut, 520 is the negative electrode inner claw, and 530 is the negative electrode sealing ring. DETAILED DESCRIPTION

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication 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.

[0019] Reference below Figure 1-12 describe the invention; A corrosion-resistant copper-aluminum terminal photovoltaic flexible connector, comprising: The female terminal 100 has a socket at the front end; A conductive ring sleeve 110 is fixedly disposed in the jack; The conductive ring sleeve 110 is provided with a plurality of connection grooves distributed around the circumference thereof, and the connection grooves extend in a wave shape along the axial direction of the conductive ring sleeve 110 ; the female terminal 100 is fixedly sleeved on the outside of the conductive ring sleeve 110 .

[0020] The male terminal 200 has a plug at the front end, and the plug is pluggable and fixed in the conductive ring sleeve 110; The copper-aluminum transition terminal 300 is detachably fixed (fixed by crimping in this case) and is arranged at the tail end of the female terminal 100 and / or the tail end of the male terminal 200, and is used to fix the female terminal 100 and the aluminum wire and / or the male terminal 200 and the aluminum wire.

[0021] The copper-aluminum transition terminal 300 includes a copper layer and an aluminum layer which are fixedly connected in sequence from the inside to the outside, and presents a ring structure.

[0022] A plurality of hollow portions 310 are provided on the circumferential surface of the copper-aluminum transition terminal 300, which facilitates observation of the connection between the aluminum wire and the tail end of the female terminal 100 and / or the tail end of the male terminal 200. A stopper 320 fixedly connected to the copper-aluminum transition terminal 300 is provided on the outer side of the hollow portion 310, and the female terminal 100 or the male terminal 200 is fixed in the corresponding positive electrode body 400 or the negative electrode body 500 through the stopper 320.

[0023] A fixedly connected stainless steel spring sheet is provided at the connection between the stopper 320 and the copper-aluminum transition terminal to ensure the tension of the stopper extending outward.

[0024] A groove 1 for fixing the copper-aluminum transition terminal 300 is provided at the tail end of the female terminal 100 and the end of the aluminum wire.

[0025] A second groove for fixing the copper-aluminum transition terminal 300 is provided at the tail end of the male terminal 200 and the end of the aluminum wire.

[0026] The first aluminum wire extends from the tail end of the positive electrode body 400, and the aluminum core in the aluminum wire is fixedly connected to the female terminal 100 through the copper-aluminum transition terminal 300; The tail end of the positive electrode body 400 is provided with a positive electrode nut 410 which is detachably fixedly connected by a thread; the positive electrode nut 410 is provided with a positive electrode inner claw 420 and a positive electrode sealing ring 430 which are connected in sequence; the aluminum wire extends from the positive electrode nut 410 into the positive electrode body 400 through the positive electrode inner claw 420 and the positive electrode sealing ring 430 in sequence, and is tightened by the positive electrode nut 410 to seal and fix the aluminum wire on the positive electrode body 400.

[0027] The second aluminum wire extends from the tail end of the negative electrode body 500, and the aluminum core in the aluminum wire is fixedly connected to the male terminal 200 through the copper-aluminum transition terminal 300; The tail end of the negative electrode body 500 is provided with a negative electrode nut 510 which is detachably fixedly connected by a thread; the negative electrode nut 510 is provided with a negative electrode inner claw 520 and a negative electrode sealing ring 530 which are connected in sequence; the aluminum wire extends from the negative electrode nut 510 into the negative electrode body 500 through the negative electrode inner claw 520 and the negative electrode sealing ring 530 in sequence, and is tightened by the negative electrode nut 510 to seal and fix the aluminum wire on the negative electrode body 500.

[0028] The positive electrode body 400 and the negative electrode body 500 are detachably fixedly connected by a clamping claw and sealed by a sealing ring. The positive and negative electrode bodies are respectively made of highly weather-resistant materials and have excellent waterproof and moisture-proof properties.

[0029] The structural design of the female terminal 100 is further described as follows: Embodiment 1: like Figure 3 As shown, the end surface of the rear end of the female terminal 100 and / or the end surface of the rear end of the male terminal 200 are respectively in a plane, and the end surface of the aluminum wire is also in a plane.

[0030] Embodiment 2: like Figure 8 As shown, the connecting end of the aluminum wire is provided with an external thread, and the tail end of the female terminal 100 or the tail end of the male terminal 200 is provided with an internal thread hole adapted to the external thread.

[0031] Embodiment three: like Fig. 9 As shown, the connection end of the aluminum wire is conical, and the tail end of the female terminal 100 or the tail end of the male terminal 200 is provided with a conical hole adapted to the connection end of the aluminum wire, thereby improving the efficiency of connecting and positioning the aluminum wire with the female terminal 100 or the male terminal 200.

[0032] Embodiment 4: like Fig.10 As shown, the connection end of the aluminum wire is an arc-shaped structure, and the tail end of the female terminal 100 or the tail end of the male terminal 200 is provided with an arc-shaped hole adapted to the connection end of the aluminum wire, thereby improving the efficiency of connecting and positioning the aluminum wire with the female terminal 100 or the male terminal 200.

[0033] Embodiment five: like Fig.11 As shown, the cross-section of the connecting end of the aluminum wire is a rectangular structure, and the tail end of the female terminal 100 or the tail end of the male terminal 200 is provided with a rectangular hole adapted to the connecting end of the aluminum wire, thereby improving the efficiency of connecting and positioning the aluminum wire with the female terminal 100 or the male terminal 200.

[0034] Embodiment six: like Fig.12 As shown, the connection end of the aluminum wire is a rectangular parallelepiped, a cube or a cylinder; the tail end of the female terminal 100 or the tail end of the male terminal 200 is provided with a connection hole adapted to the connection end of the aluminum wire, and the inner side wall of the connection hole is provided with at least a pair of positioning holes, and a positioning ball is provided in the positioning hole, and the positioning ball is pushed toward the direction of the aluminum wire by the elastic force of the spring; the connection end of the aluminum wire is provided with a positioning groove adapted to the positioning ball. When the connection end of the aluminum wire is inserted into the connection hole, the positioning ball is stuck in the positioning groove, which facilitates the efficient and stable implementation of the fixing operation of the copper-aluminum transition terminal 300.

[0035] The aluminum wire in this case can be made of aluminum alloy cable, which has the advantages of low density, high strength, good corrosion resistance and low cost. The electrical conductivity of aluminum alloy cable is not inferior to that of pure copper cable. Experimental verification shows that the electrical conductivity of traditional 4 square millimeter diameter copper cable is basically the same as that of 6 square millimeter aluminum alloy cable, which can meet the requirements of photovoltaic power station for cable conductivity and greatly reduce the cost of cables used in power stations.

[0036] At the photovoltaic power station end, a copper-aluminum conversion connector is used to connect the aluminum alloy cable to the photovoltaic module. The copper-aluminum conversion connector uses a double-layer structure of copper and aluminum layers to ensure a stable and reliable electrical connection between the aluminum alloy cable and the photovoltaic module, while reducing energy loss during the connection process. It not only ensures the conductivity of the connector, but also improves its corrosion resistance and mechanical strength. The specific contents are as follows: 1. Connection structure design: The copper-aluminum conversion connector consists of a male terminal 200 and a female terminal 100, wherein the male and female terminals are respectively made of copper, and the front end of the female terminal is designed to include a conductive ring sleeve 110 structure, the conductive ring sleeve 110 is beryllium copper, and the male core is firmly embedded in the conductive ring sleeve 110. The conductive ring sleeve 110 is cleverly provided with a plurality of connection grooves evenly distributed along its circumference on the outside, and these connection grooves not only extend in a wavy shape along the axial direction of the conductive ring sleeve to increase the contact area with the front end of the male terminal 200, but also improve the conductivity efficiency and stability.

[0037] 2. Strong sealing design: like Figure 1As shown, a sealing mechanism, namely an elastic sealing ring, is introduced at the interface of the connector. The sealing ring is made of highly elastic and aging-resistant material to ensure a tight seal even in harsh environments and effectively prevent the intrusion of impurities such as moisture and dust.

[0038] 3. Corrosion-resistant design: In order to solve the electrochemical corrosion problem existing in the connection of copper-aluminum conductors, the present invention adopts a copper-aluminum transition terminal 300 for crimping connection, which not only has excellent conductivity but also has good corrosion resistance, and can effectively inhibit the occurrence of electrochemical corrosion.

[0039] Regarding the contents disclosed in this case, there are a few points that need to be explained: (1) The drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design; (2) In the absence of conflict, the embodiments and features of the embodiments disclosed in this case may be combined with each other to obtain new embodiments; The above are only specific implementation methods disclosed in this case, but the protection scope of the present disclosure is not limited thereto. The protection scope disclosed in this case should be based on the protection scope of the claims.

Claims

1. A corrosion-resistant copper-aluminum terminal photovoltaic flexible connector, characterized in that: include: A female terminal (100) having a socket at the front end; A conductive ring sleeve (110) fixedly disposed in the insertion hole; A male terminal (200) having a plug provided at the front end, the plug being pluggable and fixedly disposed in the conductive ring sleeve (110); The copper-aluminum transition terminal (300) is detachably fixedly arranged at the rear end of the female terminal (100) and / or the rear end of the male terminal (200), and is used to fixedly connect the female terminal (100) and the aluminum wire and / or the male terminal (200) and the aluminum wire.

2. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 1, characterized in that: The end surface of the rear end of the female terminal (100) and / or the end surface of the rear end of the male terminal (200) are respectively in the form of a plane.

3. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 1, characterized in that: The copper-aluminum transition terminal (300) comprises a copper layer and an aluminum layer which are fixedly connected in sequence from the inside to the outside.

4. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 1, characterized in that: The copper-aluminum transition terminal (300) has a ring-shaped structure.

5. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 4, characterized in that: A plurality of hollow portions (310) are provided on the circumferential surface of the copper-aluminium transition terminal (300).

6. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 5, characterized in that: A stopper (320) fixedly connected to the copper-aluminum transition terminal (300) is provided on the outside of the hollow portion (310), and the female terminal (100) or the male terminal (200) is fixed in the corresponding positive electrode body (400) or the negative electrode body (500) via the stopper (320).

7. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 6, characterized in that: The tail end of the positive electrode body (400) is provided with a detachably fixedly connected positive electrode nut (410); the aluminum wire extends from the positive electrode nut (410) into the positive electrode body (400) through the positive electrode inner claw (420) and the positive electrode sealing ring (430) in sequence, and is tightened by the positive electrode nut (410) to seal and fix the aluminum wire on the positive electrode body (400).

8. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 6, characterized in that: The tail end of the negative electrode body (500) is provided with a detachably fixed negative electrode nut (510); the aluminum wire extends from the negative electrode nut (510) into the negative electrode body (500) through the negative electrode inner claw (520) and the negative electrode sealing ring (530) in sequence, and is tightened by the negative electrode nut (510) to seal and fix the aluminum wire on the negative electrode body (500).

9. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 1, characterized in that: The tail end of the female terminal (100) and the end of the aluminum wire are provided with a groove 1 for fixing the copper-aluminum transition terminal (300).

10. The anti-corrosion copper-aluminum terminal photovoltaic flexible connector according to claim 1, characterized in that: A second groove for fixing the copper-aluminum transition terminal (300) is provided at the tail end of the male terminal (200) and the end of the aluminum wire.

Images