Copper-aluminum transition terminal and copper-aluminum terminal photovoltaic connector comprising same

Abstract

The utility model relates to the field of photovoltaic technology, in particular to a copper-aluminum transition terminal and a copper-aluminum terminal photovoltaic connector comprising the copper-aluminum transition terminal. The copper-aluminum transition terminal is of an annular structure and comprises a copper layer and an aluminum layer which are fixedly connected in sequence from inside to outside; a plurality of hollow parts are arranged on the circumferential surface of the copper-aluminum transition terminal; and a retaining part fixedly connected with the copper-aluminum transition terminal is arranged on the outer side of the hollow part, and the female head terminal or the male head terminal is fixed in the corresponding positive pole body or negative pole body through the retaining part. Specifically, the joint of the retaining part and the copper-aluminum transition terminal is provided with a fixedly connected elastic sheet. According to the utility model, the problems of voltage drop and heating caused by the increase of contact resistance and electrochemical corrosion easily generated 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 utility model relates to photovoltaic technology field especially relates to copper aluminium transition terminal and contains copper aluminium terminal photovoltaic connector of copper aluminium transition terminal. BACKGROUND

[0002] A large amount of cable will be used in photovoltaic power station system. The cable used in traditional photovoltaic system is copper core wire, occupies precious copper resource, and the use cost is also relatively high, which influences the popularization of photovoltaic system to a certain extent. The aluminum resource on the earth is extremely rich, and the cost of aluminum wire is far lower than that of copper wire and is widely used in many fields. In the connection between photovoltaic power station component array and combiner box and inverter, 6mm 2 aluminum core cable can be used to replace 4mm 2 copper core photovoltaic cable to ensure the power supply capacity, and the aluminum wire can save 30% to 40% of the cost of copper wire. According to the cost calculation of copper and aluminum materials, about 1.1 yuan per meter can be saved, and according to the cable of about 1000 million to 1500 million meters used in 1GW photovoltaic power station project, the cost saving is about 11 million to 15 million yuan, and the benefit is considerable. Therefore, how to design a connecting terminal to improve the connection reliability and stability of the aluminum wire is a technical problem to be solved. UTILITY MODEL CONTENT

[0003] The utility model provides a kind of corrosion-resistant copper aluminium terminal photovoltaic flexible connector for the above problems, which maintains the mechanical elasticity and electrical performance of the original copper device, easily connects aluminum cable, and greatly reduces the construction and maintenance cost of power station.

[0004] The technical solution of the utility model is as follows:

[0005] The copper aluminium transition terminal has a ring structure and includes a copper layer and an aluminum layer fixed and connected in sequence from inside to outside.

[0006] The copper aluminium transition terminal has a plurality of hollow parts on its circumferential surface.

[0007] The hollow part is provided with a retreat-stop part fixedly connected with the copper aluminium transition terminal, and the female terminal or the male terminal is fixed in the corresponding positive body or negative body through the retreat-stop part.

[0008] Specifically, the retreat-stop part is provided with a fixedly connected spring piece at the connection with the copper aluminium transition terminal.

[0009] A kind of corrosion-resistant copper aluminium terminal photovoltaic flexible connector includes a copper aluminium transition terminal, and the copper aluminium transition terminal is connected with corresponding female terminal and / or male terminal.

[0010] The female terminal is provided with a jack at the front end, and the jack is provided with a fixedly connected conductive ring.

[0011] The male terminal front end is provided with a plug which is pluggably and fixedly arranged in the conductive ring sleeve;

[0012] The copper-aluminum transition terminal is detachably and fixedly arranged at the female terminal tail end and / or the male terminal tail end, and is used for fixedly connecting the female terminal with the aluminum wire and / or the male terminal with the aluminum wire.

[0013] Specifically, the end face of the female terminal tail end and / or the end face of the male terminal tail end is a plane.

[0014] Specifically, the tail end of the positive electrode body is provided with a detachable and fixedly connected positive electrode nut; the aluminum wire extends into the positive electrode body through the positive electrode nut, the positive electrode inner claw and the positive electrode sealing ring in sequence, and is fixedly arranged on the positive electrode body by tightening the positive electrode nut.

[0015] Specifically, the tail end of the negative electrode body is provided with a detachable and fixedly connected negative electrode nut; the aluminum wire extends into the negative electrode body through the negative electrode nut, the negative electrode inner claw and the negative electrode sealing ring in sequence, and is fixedly arranged on the negative electrode body by tightening the negative electrode nut.

[0016] Specifically, the female terminal tail end and the aluminum wire end portion are provided with a groove one for fixing the copper-aluminum transition terminal.

[0017] Specifically, the male terminal tail end and the aluminum wire end portion are provided with a groove two for fixing the copper-aluminum transition terminal.

[0018] The utility model discloses a female terminal and male terminal, the male terminal can be plugged and fixedly arranged on the female terminal through the conductive ring sleeve in the female terminal, and the female terminal and the male terminal are fixedly connected with the aluminum wire through the copper-aluminum transition terminal. The copper-aluminum transition terminal comprises a copper layer and an aluminum layer which are fixedly connected in sequence from inside to outside, and effectively solves the problems of easy electrochemical corrosion, increased contact resistance, voltage drop and heating at the copper-aluminum connecting position in the photovoltaic power station system, and improves the safety and stability of the photovoltaic power station system. DRAWINGS

[0019] Figure 1 It is the structure schematic diagram of the utility model;

[0020] Figure 2 It is the positive electrode body three -dimensional structure schematic diagram;

[0021] Figure 3 It is the positive electrode body internal structure schematic diagram;

[0022] Figure 4 It is the positive electrode body internal structure schematic diagram;

[0023] Figure 5is a three-dimensional structure schematic diagram of a female terminal and a male terminal in a connected state;

[0024] Figure 6 is a three-dimensional structure schematic diagram of a copper-aluminum transition terminal;

[0025] Figure 7 is a three-dimensional structure schematic diagram of a conductive ring sleeve;

[0026] Figure 8 is a schematic diagram of an aluminum wire and a female terminal in a connected state Figure 1 ;

[0027] Figure 9 is a schematic diagram of an aluminum wire and a female terminal in a connected state Figure 2 ;

[0028] Figure 10 is a schematic diagram of an aluminum wire and a female terminal in a connected state Figure 3 ;

[0029] Figure 11 is a schematic diagram of an aluminum wire and a female terminal in a connected state Figure 4 ;

[0030] Figure 12 is a schematic diagram of an aluminum wire and a female terminal in a connected state Figure 4 ;

[0031] In the figure, 100 is a female terminal, 110 is a conductive ring sleeve,

[0032] 200 is a male terminal,

[0033] 300 is a copper-aluminum transition terminal, 310 is a hollow part, and 320 is a retreat stop part,

[0034] 400 is a positive electrode body, 410 is a positive electrode nut, 420 is a positive electrode inner claw, and 430 is a positive electrode sealing ring,

[0035] 500 is a negative electrode body, 510 is a negative electrode nut, 520 is a negative electrode inner claw, and 530 is a negative electrode sealing ring. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0037] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like is the orientation or position relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0038] In the description of the utility model, it needs to be understood that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Reference is made below Figures 1-12 The utility model is described;

[0040] The photovoltaic connector comprises:

[0041] The female terminal 100 is provided with a socket at the front end;

[0042] The conductive ring sleeve 110 is fixedly arranged in the socket;

[0043] The conductive ring sleeve 110 is provided with a plurality of connection grooves distributed around the circumference, 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 outside the conductive ring sleeve 110.

[0044] The male terminal 200 is provided with a plug at the front end, and the plug is fixedly arranged in the conductive ring sleeve 110;

[0045] The copper-aluminum transition terminal 300 is detachably fixed (the utility model adopts the mode of crimping to be fixedly connected) at the tail end of the female terminal 100 and / or the tail end of the male terminal 200, and is used for fixedly connecting the female terminal 100 with the aluminum wire and / or the male terminal 200 with the aluminum wire.

[0046] The copper-aluminum transition terminal 300 comprises a copper layer and an aluminum layer fixedly connected in sequence from inside to outside, and has a ring structure.

[0047] The copper-aluminum transition terminal 300 is provided with a plurality of hollow parts 310 on the circumferential surface, which facilitates the 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. The hollow parts 310 are provided with a retreat-stop part 320 fixedly connected with the copper-aluminum transition terminal 300, and the female terminal 100 or the male terminal 200 is fixed in the corresponding positive body 400 or negative body 500 through the retreat-stop part 320.

[0048] The retreat-stop part is provided with a stainless steel spring fixedly connected with the connection part of the copper-aluminum transition terminal, which ensures the tension of the outward extension of the retreat-stop part.

[0049] The tail end of the female terminal 100 and the end of the aluminum wire are provided with a groove I for fixing the copper-aluminum transition terminal 300.

[0050] The tail end of the male terminal 200 and the end of the aluminum wire are provided with a groove II for fixing the copper-aluminum transition terminal 300.

[0051] The first aluminum wire extends from the tail end of the positive body 400, and the aluminum core in the aluminum wire is fixedly connected with the female terminal 100 through the copper-aluminum transition terminal 300.

[0052] The tail end of the positive body 400 is provided with a positive nut 410 which is detachably fixedly connected through threads; the positive nut 410 is provided with a positive inner claw 420 and a positive sealing ring 430 which are connected in sequence; the aluminum wire extends from the positive nut 410, passes through the positive inner claw 420 and the positive sealing ring 430 in sequence, and extends into the positive body 400, and the aluminum wire is fixedly and sealingly arranged on the positive body 400 by tightening the positive nut 410.

[0053] The second aluminum wire extends from the tail end of the negative body 500, and the aluminum core in the aluminum wire is fixedly connected with the male terminal 200 through the copper-aluminum transition terminal 300.

[0054] The tail end of the negative body 500 is provided with a negative nut 510 which is detachably fixedly connected through threads; the negative nut 510 is provided with a negative inner claw 520 and a negative sealing ring 530 which are connected in sequence; the aluminum wire extends from the negative nut 510, passes through the negative inner claw 520 and the negative sealing ring 530 in sequence, and extends into the negative body 500, and the aluminum wire is fixedly and sealingly arranged on the negative body 500 by tightening the negative nut 510.

[0055] The positive body 400 and the negative body 500 are detachably fixedly connected through a claw, and are sealed through a sealing ring. The positive body and the negative body are respectively made of high-weather-resistant material, and have excellent waterproof and moisture-proof performance.

[0056] Further description of the structure design of the tail end of the female terminal 100 is as follows:

[0057] Embodiment one:

[0058] As shown in Figure 3 the end face of the tail end of the female terminal 100 and / or the end face of the tail end of the male terminal 200 is a plane, and the end face of the aluminum wire is also a plane.

[0059] Example Two:

[0060] As shown in Figure 8 the connecting end of the aluminum wire is provided with external threads, and the tail end of the female terminal 100 or the tail end of the male terminal 200 is provided with an internal threaded hole matched with the external threads.

[0061] Example Three:

[0062] As shown in Figure 9 the connecting 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 matched with 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.

[0063] Example Four:

[0064] As shown in Figure 10 the connecting end of the aluminum wire is arc-shaped, 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 matched with 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.

[0065] Example Five:

[0066] As shown in Figure 11 the cross section of the connecting end of the aluminum wire is rectangular, and the tail end of the female terminal 100 or the tail end of the male terminal 200 is provided with a rectangular hole matched with 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.

[0067] Example Six:

[0068] As shown in Figure 12 the connecting end of the aluminum wire is a cuboid, a square or a cylinder; the tail end of the female terminal 100 or the tail end of the male terminal 200 is provided with a connecting hole matched with the connecting end of the aluminum wire, and at least one pair of positioning holes is arranged on the inner side wall of the connecting hole, and a positioning ball is arranged in the positioning hole and is pushed towards the aluminum wire by the elastic force of a spring; a positioning groove matched with the positioning ball is arranged on the connecting end of the aluminum wire. When the connecting end of the aluminum wire is inserted into the connecting hole, the positioning ball is clamped into the positioning groove, thereby facilitating the efficient and stable fixing operation of the copper-aluminum transition terminal 300.

[0069] The aluminum wire can adopt an aluminum alloy cable, which has the advantages of low density, high strength, good corrosion resistance, low cost and the like, and the conductive performance of the aluminum alloy cable is not completely inferior to that of a pure copper cable. Through experiments, it is verified that the conductive performance of a conventional 4 square millimeter diameter copper cable is basically the same as that of a 6 square millimeter aluminum alloy cable, which can meet the requirements of a photovoltaic power station on the conductive performance of a cable, and greatly reduces the cost of the cable for the power station.

[0070] At the photovoltaic power station end, a copper-aluminum conversion connector is used to realize the connection between the aluminum alloy cable and the photovoltaic module. The copper-aluminum conversion connector has a double-layer structure of a copper layer and an aluminum layer inside, which ensures the stable and reliable electrical connection between the aluminum alloy cable and the photovoltaic module, and reduces the energy loss in the connection process. Not only the conductive performance of the joint is ensured, but also the corrosion resistance and mechanical strength thereof are improved. The specific content is as follows:

[0071] 1. Connection structure design:

[0072] The copper-aluminum conversion connector is composed of a male terminal 200 and a female terminal 100, wherein the male and female terminals are made of red copper, the front end of the female terminal is designed to contain a conductive ring sleeve 110 structure, the conductive ring sleeve 110 is made of beryllium copper, and the inner core of the male terminal is firmly embedded in the inside of the conductive ring sleeve 110. A plurality of connection grooves are uniformly distributed along the circumference of the conductive ring sleeve 110, which not only extend in a wave 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 conductive efficiency and stability.

[0073] 2. Strong sealing design:

[0074] As shown in Figure 1 , a sealing mechanism, i.e. an elastic sealing ring, is introduced at the interface of the connector. The sealing ring is made of a high-elasticity and aging-resistant material, which can ensure that it remains tightly sealed even in harsh environments, effectively preventing the intrusion of moisture, dust and other impurities.

[0075] 3. Corrosion resistance design:

[0076] In view of the problem of electrochemical corrosion existing in the connection of copper-aluminum conductors, the copper-aluminum transition terminal 300 is used for crimping connection in the utility model, which not only has excellent conductive performance, but also has good corrosion resistance, and can effectively inhibit the occurrence of electrochemical corrosion.

[0077] For the content disclosed in the present case, the following points need to be explained:

[0078] (1) The embodiment disclosed in the present case only relates to the structure involved in the embodiment disclosed in the present case, and other structures can refer to the usual design;

[0079] (2) In the case of no conflict, the embodiments disclosed in the present case and the features in the embodiments can be combined with each other to obtain new embodiments;

[0080] The above is only a specific embodiment disclosed in the present case, but the protection scope of the present disclosure is not limited thereto, and the protection scope disclosed in the present case should be subject to the protection scope of the claims.

Claims

1. A copper-aluminum transition terminal characterized by, The ring structure comprises a copper layer and an aluminum layer fixedly connected in sequence from inside to outside; The circumferential surface of the copper-aluminum transition terminal (300) is provided with a plurality of hollow parts (310); The outer side of the hollow part (310) is provided with a retreat-stop part (320) fixedly connected with the copper-aluminum transition terminal (300), and the female terminal (100) or the male terminal (200) is fixed in the corresponding positive body (400) or negative body (500) through the retreat-stop part (320).

2. The copper-aluminum transition terminal of claim 1, wherein, The retreat-stop part (320) is provided with a fixedly connected elastic sheet at the connection with the copper-aluminum transition terminal (300).

3. An anti-corrosion copper-aluminum terminal photovoltaic flexible connector, characterized in that, The copper-aluminum transition terminal of claim 1 is provided with a plurality of retreat-stop parts (320) connected with the corresponding female terminal (100) and / or male terminal (200). The front end of the female terminal (100) is provided with a jack, and the jack is provided with a fixedly connected conductive ring sleeve (110) inside. The front end of the male terminal (200) is provided with a plug, and the plug is fixedly provided in the conductive ring sleeve (110) in a plug-in manner. The copper-aluminum transition terminal (300) is detachably fixedly arranged at the tail end of the female terminal (100) and / or the tail end of the male terminal (200), and is used for fixedly connecting the female terminal (100) with the aluminum wire and / or the male terminal (200) with the aluminum wire.

4. The corrosion resistant copper-aluminum terminal photovoltaic flexible connector of claim 3, wherein, The end face of the tail end of the female terminal (100) and / or the end face of the tail end of the male terminal (200) is a plane.

5. The corrosion resistant copper-aluminum terminal photovoltaic flexible connector of claim 3, wherein, The tail end of the positive body (400) is provided with a detachably fixedly connected positive nut (410), and the aluminum wire extends into the positive body (400) through the positive nut (410), a positive inner claw (420) and a positive sealing ring (430) in sequence, and is fixedly arranged on the positive body (400) by tightening the positive nut (410).

6. The corrosion resistant copper-aluminum terminal photovoltaic flexible connector of claim 5, wherein, The tail end of the negative body (500) is provided with a detachably fixedly connected negative nut (510), and the aluminum wire extends into the negative body (500) through the negative nut (510), a negative inner claw (520) and a negative sealing ring (530) in sequence, and is fixedly arranged on the negative body (500) by tightening the negative nut (510).

7. The corrosion resistant copper-aluminum terminal photovoltaic flexible connector of claim 3, wherein, The tail end of the female terminal (100) and the end of the aluminum wire are provided with a groove one for fixing the copper-aluminum transition terminal (300).

8. The corrosion resistant copper-aluminum terminal photovoltaic flexible connector of claim 3, wherein, The tail end of the male terminal (200) and the end of the aluminum wire are provided with a groove two for fixing the copper-aluminum transition terminal (300).

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