Safety Requirements for Using Electric Vehicle Cables with New Energy Sources

The development of new energy electric vehicle cables

In recent years, the demand for the global power new energy cable industry has continued to rise in emerging countries. Although the epidemic has greatly affected major new energy cable companies this year, overall, this is also an opportunity for market transformation and upgrading. In the future, both the market size of power new energy cables and the copper materials for power new energy cables will be steadily increasing. The market size of the transmission and distribution industry will increase at an average annual compound growth rate of 15% to 20%, and the sales volume is expected to exceed 6 trillion yuan by 2023.

Due to the different requirements for the use of electric vehicle cables compared to traditional wires and cables, the current wire and cable standards are difficult to cover all the requirements for charging cables, so independent charging cable product standards need to be developed to promote the healthy development of the industry. Considering the mechanical performance requirements, electrical performance requirements, safety, environmental protection and service life requirements of charging cables, new types of low-smoke, halogen-free flame-retardant materials, polyester elastomers, and polyurethane materials are more suitable for the insulation and jacket materials of charging cables, which have become the development direction of charging cable products.

Safety requirements when using new energy electric vehicle cables

New energy wires and cables are usually composed of several wires or wire groups, similar to a rope-like cable. Each group of wires is insulated from each other and usually twisted around a central point, and the entire wire has a highly insulated cover. They are mainly set up in the air or underground for the transmission of telecommunications or electricity. Cables can be divided into power cables, communication cables and control cables. So, are there safety requirements when using new energy electric vehicle cables? The specific content is as follows:

• When new energy electric vehicle cables are crossed, high-voltage cables should be below low-voltage cables. If one of the cables passes through a pipeline for protection, or is separated by a baffle within a range of 1m before and after the crossing point, the smaller allowable distance is 0.25m.

• When electric vehicle cables are close to or cross with heat pipes, if there are insulation measures, the minimum distances for parallel and crossing are 0.5m and 0.25m, respectively.
  

• When electric vehicle cables cross railways or roads, they should pass through pipelines for protection, and the protective pipelines should extend 2m outside the track or road surface.
  

• The distance between new energy electric vehicle cables and building foundations should ensure that the cables are buried outside the building's drain; When electric vehicle cables are introduced into buildings, they should pass through pipelines for protection, and the protective pipelines should also extend beyond the building's drain.
  

• The distance between cables directly buried underground and the grounding of general grounding devices should be 0.25 to 0.5m; the depth of cables directly buried underground is generally not less than 0.7m, and they should be buried below the permafrost layer.