A method for producing laminated busbars

Abstract

The invention discloses a production method of a laminated busbar. The production method of the laminated busbar comprises the following steps of (1) removing burrs from a conductive plate; (2) welding padding poles at the conductive plate, to be specific, firstly, tinning the padding pole, then carrying out heated tin soldering for a joint of the padding pole and the conductive plate, grinding a welding seam until the welding seam is neat and smooth, then correcting and finally tinning the whole conductive plate; (3) producing an adhesive-carrying insulating film, to be specific, regarding a two-way stretched polyester film (PET) as a base material, cutting the base material into a needed shape and a needed size, then correspondingly cutting a hot melt film with release paper and carrying out heat pressing by using a hot press; and (4) pressing the adhesive-carrying insulating film and the conductive plate by adopting a hot pressing mold, wherein the adhesive-carrying insulating film and the conductive plate can be well stuck with each other as rapid cooling can be done through a liquid circulation system in the hot pressing process. The production method of the laminated busbar can reduce the stray inductance value of the busbar efficiently; the busbar is molded for one time through the process above; the whole structure is compact; and the product quality and the production efficiency are greatly improved.

Description

【Technical field】 [0001] The invention relates to the technical field of electrical conductors in power distribution systems, in particular to a production method for laminated busbars. 【Background technique】 [0002] The current in the power distribution system is conducted through conductors, such as copper, aluminum wires, copper bars, etc. In high-power electrical equipment, the current is generally relatively large, and the conductors passing through the large current will be affected by various factors. resulting in energy loss. [0003] Traditionally, wires are used for power distribution. In the case of complex equipment, there will be more wires, which increases the weight of the system as a whole, and the assembly of wires is time-consuming and laborious; using copper bars to conduct current will have a large reactance and inrush current. When the frequency of the conducted current is high, due to the existence of the skin effect, the current will concentrate on ...

AI Technical Summary

Problems solved by technology

[0003] Traditionally, wires are used for power distribution. In the case of complex equipment, there will be more wires, which increases the weight of the system as a whole, and the assembly of wires is time-consuming and laborious; using copper bars to conduct current will have a large Reactance and Inrush Current

When the frequency of the conducted current is high, due to the existence of the skin effect, the current will concentrate on the surface of the conductor, which actually results in a very low utilization rate of the conduction current of the conductor; traditional busbars need to be installed multiple times during production , it is easy to make mistakes, and the structure is not compact, the equipment cost is high, the stray inductance is large, and the life is short. The use of traditional conductors not only occupies too much equipment space, but also has certain reliability and safety. question

[0004] At present, laminated busbars have been widely used in rail transit, electric power, new energy, ships, communications, industrial frequency conversion and other industries. However, in terms of the entire domestic industry, the technology and process are not mature enough. The conductive plate is usually made of red copper plate with ordinary numerical control punching, and then the burr is simply removed, and then the external tinning treatment is directly performed on the laminated busbar. There are many burrs on the edge of the conductive plate, and the processing size error is large.

There are also large differences in the production process and material selection of busbars, the service life and production flexibility are different, and there are large differences in technical complexity. Production and maintenance are still inconvenient, especially There are great difficulties in the production of a single large-scale laminate for trial production and R&D

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