Insulation structure and insulation method for connection point of heating plate pole piece and wires

Abstract

The invention discloses an insulation structure and an insulation method for a connection point of a heating plate pole piece and wires. The insulation structure comprises the heating plate pole piece and two wires, and further comprises two current-carrying plates and a low-pressure injection molding packaging plate, the end part of the wire is welded and fixed with the upper end surface of the corresponding current-carrying plate through a welding point, the current-carrying plate is tightly attached to the upper surface of the heating plate pole piece, a plurality of heating sheet through holes are dispersedly formed in the heating plate pole piece around the current-carrying plate, and the upper surface of the current-carrying plate, the upper surface of the heating plate pole piece and the lower surface of the heating plate pole piece are coated with the low-pressure injection molding packaging plate. The insulation structure provided by the invention has excellent insulation sealing performance, high waterproof and dustproof grade and good flame-retardant effect; the drawing force between the wire and the pole piece of the heating plate is improved; the performance of the product prepared by the method is far better than that of a product insulated by a dispensing or potting process; and the method can obviously improve the production efficiency and reduce the production cost.

Description

technical field [0001] The invention relates to the technical field of electric heating, in particular to an insulation structure and an insulation method for a connection point between a pole piece of a heating plate and a wire. Background technique [0002] The heating sheet is a two-dimensional planar heating material, which has been widely used in civil heating, smart wear, lithium battery pack heating, road deicing and other special applications. According to the type of heating element, planar heating sheets are divided into carbon-based heating sheets, metal-based heating sheets, metal oxide-based heating sheets and conductive polymer-based heating sheets. [0003] Usually, planar heaters are connected with cylindrical or flat wires in practical applications. There are soldering, laser welding, ultrasonic welding, resistance welding, etc. to connect the heating plate and the wire. The pulling force of the wire and the heating plate after welding is an important test ...

AI Technical Summary

Problems solved by technology

At present, there are two ways to solve the solder joints. One is to stick insulating tape on the solder joints. This method is less reliable and will fall off after long-term use; The efficiency of this method is low, the sealing effect is average, and the drying time of the sealant is long, so it is not suitable for mass production

And these two methods did not significantly improve the pullout force of solder joints

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