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Method of improving connecting reliability between polytetrafluoroethylene strand wire and aluminum foil

A technology of polytetrafluoroethylene and multi-strand wires, which is applied in connection, circuit/collector parts, electrical components, etc., can solve problems such as insufficient welding strength, high solder joint height, and large contact resistance, so as to improve reliability , The effect of reducing the contact resistance

Inactive Publication Date: 2019-03-08
HAIYING ENTERPRISE GROUP
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for improving the reliability of the connection between polytetrafluoroethylene multi-strand wire and aluminum foil, so as to solve the problems of high solder joint height, insufficient welding strength, large contact resistance and high-temperature melting of aluminum foil in the existing welding process. question

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  • Method of improving connecting reliability between polytetrafluoroethylene strand wire and aluminum foil
  • Method of improving connecting reliability between polytetrafluoroethylene strand wire and aluminum foil
  • Method of improving connecting reliability between polytetrafluoroethylene strand wire and aluminum foil

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Embodiment 1

[0025] The invention provides a method for improving the reliability of the connection between polytetrafluoroethylene strands and aluminum foil. The process is as follows figure 1 As shown, including the following steps:

[0026] Step S11, grinding away the oxide layer on the surface of the copper foil and aluminum foil welding area;

[0027] Step S12, removing the insulating skin of the polytetrafluoroethylene strands and squashing them;

[0028] Step S13: Wrap 2 layers of flattened strands with copper foil, and weld from one end of the contact surface between the copper foil and the strands to the other end;

[0029] Step S14, overlapping the aluminum foil and the copper foil and welding their contact surfaces.

[0030] Specifically, copper foil and aluminum foil are stored in an environment where the ambient temperature does not exceed 28°C and the humidity is below 60%. Preferably, the copper foil and aluminum foil are best placed in nitrogen to slow down the oxidation speed of th...

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Abstract

The invention discloses a method of improving connecting reliability between a polytetrafluoroethylene strand wire and aluminum foil and belongs to the technical field of transformer manufacturing. The method comprises the steps of grinding off an oxidation layer from the surface of a copper foil and aluminum foil welding area, removing an insulation sheath of the polytetrafluoroethylene strand wire, flattening the polytetrafluoroethylene strand wire, wrapping the flattened strand wire with copper foil by 2 layers, welding from one end to the other end of a contact surface between the copper foil and the strand wire, superposing the aluminum foil and the copper foil, and welding a contact surface between the aluminum foil and the copper foil. Contact resistance at welding parts can be reduced effectively, and the connecting reliability between the polytetrafluoroethylene strand wire and the aluminum foil is significantly improved.

Description

Technical field [0001] The invention relates to the technical field of transformer manufacturing, in particular to a method for improving the reliability of the connection between a polytetrafluoroethylene multi-strand wire and an aluminum foil. Background technique [0002] In the manufacturing process of high-power transformers that require weight, it is sometimes necessary to select aluminum foil as the winding and use polytetrafluoroethylene stranded wire as the winding lead. The traditional welding methods of PTFE lead wire and aluminum foil are solder wire welding, laser welding and spot welding. The above welding methods have problems such as large solder joint height, insufficient welding strength, large contact resistance and high temperature melting of aluminum foil. This will cause the size of the transformer to be out of tolerance, the lead of the transformer will become loose or even fall off under the vibration environment, and the welding place will generate exces...

Claims

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Application Information

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IPC IPC(8): H01F41/00H01R43/02
CPCH01F41/00H01R43/0249
Inventor 魏晓中尤进
Owner HAIYING ENTERPRISE GROUP
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