WO2023179026A1

WO2023179026A1 - Y-type copper-aluminum connector for photovoltaic system

Info

Publication number: WO2023179026A1
Application number: PCT/CN2022/128930
Authority: WO
Inventors: 董鹏; 李小卫; 赵邦桂; 仲生星
Original assignee: 青海黄河上游水电开发有限责任公司西宁太阳能电力分公司; 青海黄河上游水电开发有限责任公司西安太阳能电力分公司; 国家电投集团黄河上游水电开发有限责任公司; 青海黄河上游水电开发有限责任公司
Priority date: 2022-03-22
Filing date: 2022-11-01
Publication date: 2023-09-28
Also published as: CN114792907A

Abstract

Disclosed in the present invention is a Y-type copper-aluminum connector for a photovoltaic system. The Y-type copper-aluminum connector comprises a housing and a copper-aluminum terminal; the copper-aluminum terminal is mounted in the housing, and comprises an aluminum wire end, a first copper wire end, and a second copper wire end; the first copper wire end and the second copper wire end are respectively and fixedly connected to the aluminum wire end; the aluminum wire end is made of aluminum, and the first copper wire end and the second copper wire end are both made of copper; a part of the aluminum wire end extends out of the housing for connection to an aluminum cable, and a part of the first copper wire end and a part of the second copper wire end respectively extend out of the housing for connection to copper terminal photovoltaic connector tabs. The copper-aluminum terminal of the Y-type copper-aluminum connector comprises one aluminum wire end and two copper wire ends, so that one aluminum cable can be connected to two copper terminal photovoltaic connector tabs at the same time.

Description

Y-type copper-aluminum connectors for photovoltaic systems

Technical field

The invention belongs to the technical field of connectors for photovoltaic systems, and specifically relates to a Y-shaped copper-aluminum connector for photovoltaic systems.

Background technique

The commonly used photovoltaic connectors use PV1-F1*4 copper cables. The connectors use copper terminals and photovoltaic connector male and female terminals for plugging. This structure is only suitable for the connection of copper wires. In recent years, special copper-aluminum connectors for photovoltaics have been developed on the market. The male-female plug-in structure of the copper-terminal photovoltaic connector is designed on the copper-aluminum terminal, replacing the commonly used copper-terminal photovoltaic connector joints on the market. It can be used with commonly used in the market The copper terminal photovoltaic connector joint can be plugged in to realize the connection between copper wire and aluminum wire. This method can change the copper wire at one end to an aluminum wire, reducing production costs.

However, the current copper-aluminum connectors are all one-to-one connectors, and it is not possible for one aluminum wire to be connected to two copper terminal photovoltaic connector joints at the same time, that is, it is impossible to achieve a one-to-two connection.

Contents of the invention

(1) Technical problems to be solved by the present invention

How to provide a new type of copper-aluminum connector so that one aluminum wire can be connected to two copper terminal photovoltaic connector joints at the same time.

(2) Technical solutions adopted in the present invention

A Y-shaped copper-aluminum connector for photovoltaic systems. The Y-shaped copper-aluminum connector includes a housing and copper-aluminum terminals. The copper-aluminum terminals are installed in the housing, wherein the copper-aluminum terminals include aluminum wires. end, a first copper wire end and a second copper wire end, the first copper wire end and the second copper wire end are respectively fixedly connected to the aluminum wire end, and the material of the aluminum wire end is aluminum, and the The first copper wire end and the second copper wire end are both made of copper, and a portion of the aluminum wire end extends outside the housing for connecting an aluminum cable. The portion of the first copper wire end and the Parts of the second copper wire ends respectively extend outside the housing for connecting copper terminals to photovoltaic connector joints.

Optionally, the aluminum wire end includes a first welding section, a second welding section and a crimping section that are integrally connected, and the first welding section is welded to the first section of the first copper wire end, The second welding section is welded to the first section of the second copper wire end, the crimping section is used to connect the aluminum cable, the tail section of the first copper wire end and the second copper wire The tail sections are used to connect copper terminals to photovoltaic connector joints.

Optionally, a first positioning groove is provided on the side wall of the first section of the first copper wire end, and a second positioning groove is provided on the side wall of the first section of the second copper wire end; the Y-shaped copper-aluminum The connector also includes a first clamp ring and a second clamp ring. The first clamp ring is sleeved on the first positioning groove and the first clamp ring is clamped and fixed with the inner wall of the housing. The second clamp ring The clamp ring is sleeved on the second positioning groove, and the second clamp ring is clamped and fixed with the inner wall of the housing.

Optionally, the tail section of the first copper wire end and the tail section of the second copper wire end are both hollow sections, a first contact finger is provided in the tail section of the first copper wire end, and the second copper wire end is provided with a first contact finger. A second contact finger is provided in the tail section of the line end.

Optionally, the Y-shaped copper-aluminum connector further includes a first female interface and a second female interface, both of the first female interface and the second female interface are fixed on the housing, and the first female interface The tail section of the copper wire end is inserted into the first female interface, and the tail section of the second copper wire end is inserted into the second female interface, wherein the first female interface and the second female interface They are respectively used to plug into the copper terminal photovoltaic connector joints.

Optionally, the Y-shaped copper-aluminum connector further includes a crimping component, the crimping section is provided with a crimping hole extending along the axial direction, the crimping hole is used to accommodate the aluminum cable stripping After the aluminum wire core is exposed, the crimping assembly is used to compress the crimping section and the aluminum cable so that the aluminum wire core is fixedly connected to the crimping hole.

Optionally, the crimping assembly includes a plastic nut, a plastic flower basket and a waterproof sleeve. The waterproof sleeve is sleeved at the junction of the crimping section and the aluminum cable. The plastic flower basket is sleeved on the Outside the waterproof cover; the plastic nut is screwed on the outside of the plastic flower basket and fixed on the outer shell to fasten the waterproof cover and the aluminum wire core.

Optionally, the housing is provided with a threaded fixing part, and the plastic nut is threadedly connected to the threaded fixing part.

Optionally, the Y-shaped copper-aluminum connector further includes a bottom cover, the housing has an opening, and the bottom cover is closed with the opening; the bottom cover has a bottom cover through hole, and the thread is fixed The crimping section passes through the through hole of the bottom cover and is inserted into the threaded fixing portion.

Optionally, the Y-shaped copper-aluminum connector further includes a first sealing ring and a second sealing ring, a first slot is provided at the connection between the first female interface and the housing, and the first sealing ring is It is provided on the first clamping groove, a second clamping slot is provided at the connection between the second female interface and the housing, and the second sealing ring is set on the second clamping slot.

(3) Beneficial effects

The invention discloses a Y-shaped copper-aluminum connector for photovoltaic systems. Compared with the traditional one-to-one copper-aluminum connector, it has the following technical effects:

The copper-aluminum terminal of the Y-shaped copper-aluminum connector has one aluminum wire end and two copper wire ends, which enables one aluminum cable to be connected to two copper terminal photovoltaic connector joints at the same time.

In addition, the Y-shaped copper-aluminum connector has a simple structure and low raw material cost; it is easy to operate and assemble on the construction site; the bottom cover and the shell of the Y-shaped copper-aluminum connector are fused together through ultrasonic waves, and can meet the IP67 waterproof and dustproof standard ; The connector can be directly plugged into the commonly used copper terminal photovoltaic connectors on the market, and has strong versatility; the connector is small and lightweight.

Description of the drawings

Figure 1 is a schematic structural diagram of a Y-shaped copper-aluminum connector used in a photovoltaic system according to an embodiment of the present invention;

Figure 2 is an exploded schematic diagram of a Y-shaped copper-aluminum connector used in a photovoltaic system according to an embodiment of the present invention;

Figure 3 is a schematic structural diagram of a copper-aluminum terminal according to an embodiment of the present invention;

Figure 4 is a schematic cross-sectional view of a Y-shaped copper-aluminum connector used in a photovoltaic system according to an embodiment of the present invention;

Figure 5 is a schematic structural diagram of a copper-aluminum terminal according to another embodiment of the present invention;

Figure 6 is a schematic cross-sectional view of a Y-shaped copper-aluminum connector for photovoltaic systems according to another embodiment of the present invention;

Figure 7 is an exploded schematic diagram of a Y-shaped copper-aluminum connector for photovoltaic systems according to another embodiment of the present invention;

Figure 8 is a schematic structural diagram of a Y-shaped copper-aluminum connector used in a photovoltaic system according to another embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

Before describing each embodiment of the present application in detail, first briefly describe the technical concept of the present application: the photovoltaic-specific copper-aluminum connector in the prior art can currently only realize the connection between one aluminum terminal and one copper terminal, and cannot satisfy the requirements of one aluminum terminal. Simultaneous connection with both copper terminals. To this end, this application provides a Y-shaped copper-aluminum connector for photovoltaic systems. The copper-aluminum terminals of the Y-shaped copper-aluminum connector include one aluminum wire end and two copper wire ends. The two copper wire ends are connected to Aluminum wire ends are welded, where the aluminum wire ends are used to connect aluminum cables, and the copper wire ends are used to connect copper terminal photovoltaic connector joints. In this way, one aluminum cable can be connected to two copper terminal photovoltaic connector joints at the same time, achieving one point. For the function of two.

Specifically, as shown in FIGS. 1 and 2 , the Y-shaped copper-aluminum connector for photovoltaic systems disclosed in this embodiment includes a housing 10 and copper-aluminum terminals 20 , and the copper-aluminum terminals 20 are installed in the housing 10 . As shown in Figure 3, the copper-aluminum terminal 20 includes an aluminum wire end 21, a first copper wire end 22 and a second copper wire end 23. The first copper wire end 22 and the second copper wire end 23 are respectively connected with the aluminum wire end 21. Fixed connection, the aluminum wire end 21 is made of aluminum, the first copper wire end 22 and the second copper wire end 23 are both made of copper, part of the aluminum wire end 21 extends outside the shell 10 for connecting aluminum cables 100. Parts of the first copper wire end 22 and the second copper wire end 23 respectively extend outside the housing 10 for connecting to the copper terminal photovoltaic connector joint.

Exemplarily, the aluminum wire end 21 includes a first welding section 21a, a second welding section 21b and a crimping section 21c that are integrally connected. The first welding section 21a is connected to the first section 22a of the first copper wire end 22 Welding, the second welding section 21b is welded to the first section 23a of the second copper wire end 23, the crimping section 21c is used to connect the aluminum cable 100, the tail section 22b of the first copper wire end 22 and the second copper wire end The tail sections 23b of 23 are respectively used to connect copper terminals to photovoltaic connector joints. The first welding section 21 a and the second welding section 21 b are both L-shaped, the copper-aluminum terminal 20 is Y-shaped as a whole, and the shape of the housing 10 matches the shape of the copper-aluminum terminal 20 .

As a preferred embodiment, the first welding section 21a and the first section 22a of the first copper wire end 22, and the second welding section 21b and the first section 23a of the second copper wire end 23 are all welded by high-speed friction welding.

Furthermore, a first positioning groove 22c is provided on the side wall of the first section 22a of the first copper wire end 22, and a second positioning groove 23c is provided on the side wall of the first section 23a of the second copper wire end 23. As shown in Figure 4, the Y-shaped copper-aluminum connector also includes a first clamping ring 30 and a second clamping ring 40. The first clamping ring 30 is sleeved on the first positioning groove 22c, and the first clamping ring 30 is connected to the housing 10. The inner wall is clamped and fixed, the second clamping ring 40 is sleeved on the second positioning groove 23c, and the second clamping ring 40 is clamped and fixed with the inner wall of the housing 10 . Through the fixing effect of the first clamp ring 30 and the second clamp ring 40, the connection stability between the housing 10 and the copper-aluminum terminal 20 can be improved and the occurrence of backlash failure can be prevented.

Illustratively, the tail section 22b of the first copper wire end 22 and the tail section 23b of the second copper wire end 23 are both hollow sections, and the first contact finger 24 is disposed in the tail section 22b of the first copper wire end 22. A second contact finger 25 is provided in the tail section 23b of the second copper wire end 23. By providing the first contact finger 24 and the second contact finger 25, the tail section 22b of the first copper wire end 22 and the second copper wire end can be ensured. After the tail section 23b of 23 is quickly plugged into the copper terminal photovoltaic connector joint, the insertion and extraction force meets the standard requirements, improving product safety performance.

Further, as shown in Figure 4, the Y-shaped copper-aluminum connector also includes a first female interface 50 and a second female interface 60. The first female interface 50 and the second female interface 60 are both fixed on the housing 10, and the first female interface 50 and the second female interface 60 are fixed on the housing 10. The tail section 22b of the copper wire end 22 is inserted into the first female interface 50, and the tail section 23b of the second copper wire end 23 is inserted into the second female interface 60, where the first female interface 50 and the second female interface 60 The shape is designed to match the shape of mainstream copper terminal photovoltaic connector joints on the market, so that the first female interface 50 and the second female interface 60 can be plugged into the copper terminal photovoltaic connector joints.

Further, the Y-shaped copper-aluminum connector also includes a first sealing ring 70 and a second sealing ring 80. A first latching groove 51 is provided at the connection between the first female interface 50 and the housing 10. The first latching groove 51 is formed around the first sealing ring 70 and the second sealing ring 80. There is an annular slot for the copper wire end 22, and the first sealing ring 70 is sleeved on the first slot 51. A second slot 61 is provided at the connection between the second female interface 60 and the housing 10 . The second slot 61 is an annular slot surrounding the second copper wire end 23 . The second sealing ring 70 is sleeved on the second slot 61 . On the groove 61, when the first female interface 50 and the second female interface 60 are inserted into the copper terminal photovoltaic connector joint, the first sealing ring 70 and the second sealing ring 80 can achieve a waterproof and dustproof effect.

Illustratively, as shown in Figures 2 and 4, the Y-shaped copper-aluminum connector also includes a crimping assembly 90. The crimping section 21c is provided with an axially extending crimping hole 21d, and the crimping hole 21d is used for Accommodating the aluminum wire core 101 exposed after the aluminum cable 100 is peeled, the crimping assembly 90 is used to press the crimping section 21c and the aluminum cable 100 so that the aluminum wire core 101 is fixedly connected to the crimping hole 21d.

Further, as shown in Figures 5 and 6, a number of elastic clamping strips 210 are also provided in the crimping hole 21d. The first end 210a of the elastic clamping strip 210 is fixedly connected to the inner wall of the crimping hole 21d. The elastic clamping strips The second end 210b of 210 opposite to the first end 210a extends obliquely along the direction close to the housing 10, and a plurality of elastic clamping strips 210 are distributed in a conical shape as a whole. When the aluminum wire core 101 is inserted into the crimping hole 21d forward, the aluminum wire core 101 contacts the second end 210b; when the aluminum wire core 101 is pulled in the direction, the aluminum wire core can be restricted due to the blocking effect of the second end 210b. 101 is pulled out to ensure the connection stability of the aluminum wire core 101.

Further, the crimping assembly 90 includes a plastic nut 91, a plastic flower basket 92 and a waterproof sleeve 93. The waterproof sleeve 93 is sleeved at the junction of the crimping section 21c and the aluminum cable 100, and the plastic flower basket 92 is sleeved outside the waterproof sleeve 93. ; The plastic nut 91 is tightened outside the plastic flower basket 92 and fixed on the shell 10 to fasten the waterproof cover 93 and the aluminum wire core 101. For example, the housing 10 is provided with a threaded fixing part 12 , the plastic nut 91 is threadedly connected to the threaded fixing part 12 , and the crimping section 21 c is inserted into the through hole 12 a of the threaded fixing part 12 .

Furthermore, the crimping section 21c protrudes from the housing 10 and is accommodated inside the threaded fixing part 12, that is, the crimping section 21c does not protrude outside the through hole of the threaded fixing part 12, and a part of the waterproof sleeve 93 is located in the threaded fixing part. 12 within the through hole 12a, the other part of the waterproof cover 93 is located outside the through hole 12a, the main body of the plastic flower basket 92 is located outside the through hole 12a, and the edge of the plastic flower basket 92 is located within the through hole 12a, so that when the plastic When the nut 91 is connected and fixed to the threaded fixing part 12, the plastic flower basket 92 and the waterproof sleeve 93 can be effectively pressed, while ensuring the overall stability of the crimping assembly 90.

The assembly method is: first, peel off part of the aluminum cable 100 to expose the aluminum wire core 101, insert the aluminum wire core 101 into the crimping hole 21d, and sleeve the waterproof sleeve 93 to the aluminum wire core 101 and the crimping hole 21d. At the junction of , so that the aluminum wire core 101 is firmly connected to the crimping hole 21d.

As shown in Figures 5 and 6, in another embodiment, the outer wall of the crimping section 21c is provided with a threaded groove 21e, and the inner wall of the waterproof sleeve 93 is provided with a threaded protrusion 93a that matches the threaded groove 21e. , when the waterproof sleeve 93 is set on the crimping section 21c, the threaded groove 21e is engaged with the threaded protrusion 93a, which can limit the crimping section 21c in the axial direction. In this way, when the aluminum cable 100 is pulled by the outside world and the crimping section 21c is pulled, due to the blocking effect of the threaded protrusion 93a, the outside pulling force will not be transmitted to the first copper wire end 22 and the second copper wire end 23 , which can prevent the welding joint between the copper wire end and the aluminum wire end from being interfered by external forces and improve the connection stability.

As shown in Figure 7, in another embodiment, the outer wall of the threaded fixing part 12 is provided with a back-stop spring piece 12b, and the inner wall of the plastic nut 91 has a locking groove that cooperates with the back-stop spring piece 12b. When the forward direction When the plastic nut 91 is rotated to be threadedly connected and locked with the threaded fixing part 12, the anti-retraction elastic piece 12b is opened in the locking groove to prevent the plastic nut 91 from rotating in the opposite direction and prevent the plastic nut 91 from being connected to the threaded fixing part 12. produce looseness.

In another embodiment, the Y-shaped copper-aluminum connector also includes a bottom cover 13, the housing 10 has an opening 10a, and the bottom cover 13 is closed with the opening 10a; the bottom cover 13 has a bottom cover through hole, and the crimping section 21c Passing through the bottom cover through hole, the threaded fixing portion 12 is provided on the periphery of the bottom cover through hole. Among them, the bottom cover 13 and the opening 10a can be fixed by ultrasonic welding to improve the sealing of the connection and prevent water and dust. Using the bottom cover connection method, during the actual installation process, the copper-aluminum terminal 20 can be taken out of the housing 10 as a whole, and then assembled according to the above assembly method, and finally the copper-aluminum terminal 20 can be pushed into the housing 10, so that The first clamp ring 30 and the second clamp ring 40 are clamped and fixed on the inner wall of the housing 10. The tail section 22b of the first copper wire end 22 penetrates into the first female interface 50, and the tail section 22b of the second copper wire end 23 penetrates into the first female interface 50. 23b penetrates into the second female interface 60, thereby greatly improving the convenience of assembly.

As shown in Figures 6, 7, and 8, in another embodiment, the Y-shaped copper-aluminum connector further includes a first locking cap 110 and a second locking cap 120. Between the first female interface 50 and the housing 10 A first annular portion 103 is provided at the connection, and a second annular portion 104 is provided at the connection between the second female interface 60 and the housing 10 , wherein the first annular portion 103 surrounds the first slot 51 and is connected with the first slot 51 . 51 are spaced apart from each other, and the second annular portion 104 surrounds the second card groove 61 and is spaced apart from the first card groove 51 . The first locking cap 110 is threadedly connected to the first annular portion 103, so that the first female interface 50 is located inside the first locking cap 110 to play a protective role; the second locking cap 120 is threadedly connected to the second annular portion 104, The second female interface 60 is located inside the second locking cap 120 to play a protective role. In addition, the first locking cap 110 and the second locking cap 120 are also used to cooperate with the corresponding socket through threaded connection to improve The stability of Y-shaped copper-aluminum connector during use.

This embodiment discloses a Y-shaped copper-aluminum connector for photovoltaic systems. The copper-aluminum terminal has one aluminum wire end and two copper wire ends, which enables one aluminum cable to be connected to two copper terminal photovoltaic connectors at the same time. connect. In addition, the Y-shaped copper-aluminum connector has a simple structure and low raw material cost; it is easy to operate and assemble on the construction site; the bottom cover and the shell of the Y-shaped copper-aluminum connector are fused together through ultrasonic waves, and can meet the IP67 waterproof and dustproof standard ; The connector can be directly plugged into the commonly used copper terminal photovoltaic connectors on the market, and has strong versatility; the connector is small and lightweight.

The specific embodiments of the present invention have been described in detail above. Although some embodiments have been shown and described, those skilled in the art will understand that the invention can be practiced without departing from the principles and spirit of the invention as defined by the claims and their equivalents. Under the circumstances, these embodiments can be modified and improved, and these modifications and improvements should also be within the protection scope of the present invention.

Claims

A Y-shaped copper-aluminum connector for photovoltaic systems, wherein the Y-shaped copper-aluminum connector includes a shell and copper-aluminum terminals, the copper-aluminum terminals are installed in the shell, and the copper-aluminum terminals include An aluminum wire end, a first copper wire end and a second copper wire end. The first copper wire end and the second copper wire end are respectively fixedly connected to the aluminum wire end. The material of the aluminum wire end is aluminum, The material of the first copper wire end and the second copper wire end is copper, and the part of the aluminum wire end extends outside the housing for connecting aluminum cables. The parts of the first copper wire end and Parts of the second copper wire ends respectively extend outside the housing for connecting copper terminals to photovoltaic connector joints.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 1, wherein the aluminum wire end includes a first welding section, a second welding section and a crimping section that are integrally connected, and the The first welding section is welded to the first section of the first copper wire end, the second welding section is welded to the first section of the second copper wire end, and the crimping section is used to connect the aluminum cable , the tail section of the first copper wire end and the tail section of the second copper wire end are respectively used to connect the copper terminal photovoltaic connector joint.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 2, wherein a first positioning groove is provided on the side wall of the first section of the first copper wire end, and the first section of the second copper wire end is A second positioning groove is provided on the side wall; the Y-shaped copper-aluminum connector also includes a first clamp ring and a second clamp ring, the first clamp ring is set on the first positioning slot and the third A clamping ring is clamped and fixed to the inner wall of the housing, the second clamping ring is sleeved on the second positioning groove, and the second clamping ring is clamped and fixed to the inner wall of the housing.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 2, wherein the tail section of the first copper wire end and the tail section of the second copper wire end are both hollow sections, and the first copper wire end is hollow. A first contact finger is provided in the tail section of the wire end, and a second contact finger is provided in the tail section of the second copper wire end.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 2, wherein the Y-shaped copper-aluminum connector further includes a first female interface and a second female interface, the first female interface and the The second female interfaces are both fixed on the housing, and the tail section of the first copper wire end is passed through the first female interface, and the tail section of the second copper wire end is passed through the second female interface. In the interface, the first female interface and the second female interface are respectively used to plug in the copper terminal photovoltaic connector joint.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 2, wherein the Y-shaped copper-aluminum connector further includes a crimping assembly, and the crimping section is provided with a crimping rod extending along the axial direction. The crimping hole is used to accommodate the aluminum wire core exposed after the aluminum cable is peeled, and the crimping component is used to compress the crimping section and the aluminum cable so that the aluminum The wire core is fixedly connected to the crimping hole.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 6, wherein the crimping assembly includes a plastic nut, a plastic flower basket and a waterproof sleeve, and the waterproof sleeve is sleeved on the crimping section and At the junction of the aluminum cables, the plastic flower basket is set outside the waterproof cover; the plastic nut is screwed on the outside of the plastic flower basket and fixed on the shell to tighten the waterproof cover and The aluminum wire core.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 7, wherein the housing is provided with a threaded fixing part, and the plastic nut is threadedly connected to the threaded fixing part.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 8, wherein the Y-shaped copper-aluminum connector further includes a bottom cover, the housing has an opening, and the bottom cover and the opening cover The bottom cover has a bottom cover through hole, the threaded fixing part is arranged on the periphery of the bottom cover through hole, and the crimping section passes through the bottom cover through hole and is inserted into the thread Fixed inside.
The Y-shaped copper-aluminum connector for photovoltaic systems according to claim 5, wherein the Y-shaped copper-aluminum connector further includes a first sealing ring and a second sealing ring, the first female interface and the A first clamping groove is provided at the connection point of the casing, and the first sealing ring is set on the first clamping groove. A second clamping groove is provided at the connection point between the second female interface and the casing. Two sealing rings are sleeved on the second slot.