Title: hinge design of anti-leakage charging pile shell

With the increasing popularity of new energy vehicles, the construction of charging stations is advancing rapidly. As one of the important supporting facilities of new energy vehicles, the safety of charging piles has attracted much attention. Among them, the design of charging pile shell is very important. The hinge of the charging pile shell, as an inconspicuous small accessory, its safety performance is related to the safe use of the whole charging pile. Therefore, it is particularly important to research and develop the shell hinge of charging pile with excellent insulation.

I. Overview of the hinge of charging pile shell

The hinge of the charging pile shell is used to fix the connector between the charging pile shell and the box, which mainly plays the role of opening and closing. Because the charging pile is usually located in the outdoor environment and works under high voltage for a long time, it is easy to cause current leakage under the influence of bad weather. If the hinge of charging pile shell does not have good insulation performance, it will bring great security risks to users. Therefore, for charging piles, it is very important to adopt a shell hinge with good insulation and weather resistance.

Second, the selection of hinge materials for charging pile shell

At present, the common hinge materials of charging pile shell in the market mainly include metal materials (such as aluminum alloy), engineering plastics and other non-metal materials. Although the hinge made of metal material has high strength and long service life, it is easy to corrode and rust and has strong conductivity. Engineering plastics stand out among many materials because of its light weight and low cost. However, ordinary engineering plastics can not meet the requirements of temperature resistance and aging resistance of the hinge of the charging pile shell, so it must be modified before it can be applied to practical production.

Third, the application of modified engineering plastics

In order to improve the comprehensive performance index of engineering plastics, we can addInorganic fillers or organic additives. Among them, glass fiber reinforced nylon 66 is one of the most common modification methods. By adding a certain proportion of glass fiber, the mechanical strength, stiffness and dimensional stability of engineering plastic products can be significantly improved. At the same time, this kind of composite material also has excellent flame retardant and self-extinguishing ability, which can effectively reduce the fire risk. In addition, in view of the fact that the hinge of charging pile shell needs good insulation, some special functional additives can be added in the modification process to further improve its electrical performance. For example, adding silane coupling agent can improve the interfacial adhesion of composites; Adding proper amount of carbon black is helpful to reduce the surface resistivity and increase the antistatic effect.

IV. Conclusion

In a word, the new engineering plastics made of suitable materials and scientifically and reasonably modified will gradually become the mainstream trend in the future. Only in this way can we ensure that the hinge of the charging pile shell not only has enough bearing capacity and service life, but also can ensure that the product has high safety in the whole life cycle.

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