CN-122026135-A - Wire harness connector and wire connecting terminal applied to photovoltaic system and connection method of wire harness connector and wire connecting terminal

Abstract

The invention discloses a wire harness connector, a wiring terminal and a connection method thereof applied to a photovoltaic system, relates to the field of photovoltaic electricity, and aims to reduce the cost of an electrical connector of the photovoltaic system and ensure the connection stability and operability of the electrical connector. The wiring terminal comprises a multi-core aluminum wire and a copper transition piece, part or all of the copper transition piece is overlapped with the multi-core aluminum wire, the overlapped area of the multi-core aluminum wire and the copper transition piece is connected by adopting an ultrasonic spot welding process, and the copper transition piece is further connected with a copper target connector or a connecting point. According to the invention, the cost reduction of aluminum-substituted copper replacement of the electrical connector of the photovoltaic system is realized, meanwhile, the connection resistance is effectively reduced, the long-term reliability of dissimilar metal connection is ensured, and the scene universality of copper-aluminum heterogeneous connection is improved.

Inventors

• Request for anonymity
• Request for anonymity
• Request for anonymity
• Request for anonymity

Assignees

• 重庆御芯微信息技术有限公司

Dates

Publication Date

20260512

Application Date

20260317

Claims (10)

1. 1. Be applied to pencil binding post of photovoltaic system, characterized in that includes: a multi-core aluminum wire; The copper transition piece is used for being connected to a target connector or a target connection point; And part or all of the copper transition piece is overlapped with the multi-core aluminum wire, and the overlapped area of the multi-core aluminum wire and the copper transition piece is connected by adopting an ultrasonic spot welding process.
2. 2. The wire harness connection terminal for a photovoltaic system according to claim 1, wherein the copper transition piece is a multicore copper wire or a copper wire loop.
3. 3. The wire harness connection terminal for a photovoltaic system according to claim 2, wherein the multicore aluminum wire is passed into or through the copper wire ring or is in contact with an outer surface of the copper wire ring so as to overlap with the copper wire ring.
4. 4. A harness terminal as claimed in claim 2 or claim 3 wherein the copper wire loop has a break in cross section.
5. 5. The wire harness connection terminal for a photovoltaic system according to claim 2, wherein the multicore copper wire and the multicore aluminum wire are layered in an overlapping region.
6. 6. The wire harness terminal as claimed in claim 1 further comprising a protective sheath surrounding at least an overlapping region of the multi-core aluminum wire and the copper transition piece.
7. 7. A harness connector for use in a photovoltaic system, comprising: a multi-core aluminum wire; A multi-core copper wire; A connector; One end of the multi-core copper wire is overlapped with the multi-core aluminum wire, the overlapped area of the multi-core aluminum wire and the multi-core copper wire is connected by adopting an ultrasonic spot welding process, and the other end of the multi-core copper wire is connected with the connector.
8. 8. A method of splicing a wire harness connection terminal applied to a photovoltaic system, the connection terminal comprising: a multi-core aluminum wire; a copper transition piece; the multi-core aluminum wire is connected with the overlapping area of the copper transition piece by adopting an ultrasonic spot welding process; The connection method comprises the following steps: the copper transition piece of the terminal is connected to a target connector or welded to a target connection point.
9. 9. The splicing method according to claim 8, wherein the copper transition piece is a multi-core copper wire, and the method for connecting the multi-core aluminum wire and the multi-core copper wire in the overlapping area comprises: layering and stacking the multi-core copper wire and the multi-core aluminum wire; and welding the overlapped area by adopting an ultrasonic spot welding process.
10. 10. The splicing method according to claim 8, wherein the copper transition piece is a copper wire loop, and the method for connecting the multi-core aluminum wire and the copper wire loop in the overlapping region comprises: Placing the multi-core aluminum wire on the surface of the copper wire ring or penetrating through the copper wire ring; and welding the overlapped area by adopting an ultrasonic spot welding process.

Description

Wire harness connector and wire connecting terminal applied to photovoltaic system and connection method of wire harness connector and wire connecting terminal Technical Field The invention relates to the technical field of photovoltaic electricity, in particular to a wire harness connector applied to a photovoltaic system, a wire harness connecting terminal applied to the photovoltaic system and a connecting method applied to the wire harness connecting terminal of the photovoltaic system. Background One of the central driving forces in the photovoltaic industry is the continual reduction in electricity (i.e., per degree) costs. In BOS (Balance of System-photovoltaic) costs of a photovoltaic system, many electrical connectors (such as cables, connectors, junction boxes, etc.) are copper materials, and the electrical connectors of the photovoltaic system have become one of the main obstacles to system cost reduction because copper materials are expensive and fluctuate severely. The aluminum material has low price and rich reserves, and the aluminum material is used for replacing copper materials as electric connecting pieces, so that the feasibility scheme of system cost reduction is realized for the photovoltaic industry. However, at present, copper is still commonly or even entirely adopted in the photovoltaic industry on key conductor assemblies such as cables, MC4 connectors, PCB circuits and the like, because there is a key technical challenge between dissimilar metals of copper and aluminum that cannot be effectively solved for a long time, namely, a problem of long-term reliability of connection. This severely limits the cost reduction applications of aluminum materials to copper materials in the photovoltaic industry. Disclosure of Invention The invention aims to provide a wire harness connector, a wire connecting terminal and a connecting method thereof applied to a photovoltaic system, aiming at all or part of the problems, so as to reduce the cost of the electrical connector of the photovoltaic system and ensure the connection stability and operability of the electrical connector. The technical scheme adopted by the invention is as follows: a harness binding post for a photovoltaic system, comprising: a multi-core aluminum wire; The copper transition piece is used for being connected to a target connector or a target connection point; And part or all of the copper transition piece is overlapped with the multi-core aluminum wire, and the overlapped area of the multi-core aluminum wire and the copper transition piece is connected by adopting an ultrasonic spot welding process. The copper transition piece is a multi-core copper wire or a copper wire connecting ring. Optionally, the multi-core aluminum wire passes into or through the copper wire ring or contacts the outer surface of the copper wire ring to overlap with the copper wire ring. Optionally, the cross section of the copper wire loop has a break point. Optionally, the multi-core copper wire and the multi-core aluminum wire are layered and stacked in an overlapping area. Optionally, the wire harness connecting terminal applied to the photovoltaic system further comprises a protective sleeve, and the protective sleeve at least covers the overlapping area of the multi-core aluminum wire and the copper transition piece. In addition, the invention also provides a wire harness connector applied to a photovoltaic system, which comprises: a multi-core aluminum wire; A multi-core copper wire; A connector; One end of the multi-core copper wire is overlapped with the multi-core aluminum wire, the overlapped area of the multi-core aluminum wire and the multi-core copper wire is connected by adopting an ultrasonic spot welding process, and the other end of the multi-core copper wire is connected with the connector. In addition, the invention also provides a connection method of the wiring harness connecting terminal applied to the photovoltaic system, and the connecting terminal comprises the following steps: a multi-core aluminum wire; a copper transition piece; the multi-core aluminum wire is connected with the overlapping area of the copper transition piece by adopting an ultrasonic spot welding process; The connection method comprises the following steps: the copper transition piece of the terminal is connected to a target connector or welded to a target connection point. Optionally, the copper transition piece is a multi-core copper wire, and the connecting method of the multi-core aluminum wire and the multi-core copper wire in the overlapping area comprises the following steps: layering and stacking the multi-core copper wire and the multi-core aluminum wire; and welding the overlapped area by adopting an ultrasonic spot welding process. Or the copper transition piece is a copper wire connecting ring, and the connecting method of the multi-core aluminum wire and the copper wire connecting ring in the overlapping area comprises the following steps