Charging pile cable as a bridge connecting the pile and the car, its performance is very important. In addition to the basic cable outdoor performance such as insulation and flame retardancy, the overall hardness of the cable should not be too high, because it must be bent frequently. The so-called charging pile cable material generally refers to elastomer-related materials, which are used for the insulation layer and the sheath layer. Material properties require oil resistance, tear resistance, weather resistance, chemical resistance, high and low-temperature resistance, and softness. At present, the more mainstream ones are TPU, TPE, and PVC elastomers.
The characteristics of TPU are high strength and good wear resistance. These two points cannot be replaced by other TPE materials. The wear resistance and strength performance of TPU are much better than TPE, but the feel is not as good as TPE. At present, the softest hardness of TPU is probably above 55A.
The main characteristics of TPU are a wide range of hardness, and as the hardness increases, its products still maintain good elasticity and wear resistance, high mechanical strength, outstanding cold resistance, good processing performance, oil resistance, water resistance, mold resistance, recycling Sex is good. Compared with TPU, TPE has higher elastic loss under high hardness.
TPE is the abbreviation of Thermoplastic Elastomer, which means thermoplastic elastomer. It is a kind of special functional material with plasticity and rubber elasticity. Thermoplastic elastomer TPE has the characteristics of the high elasticity, high strength, high resilience of rubber, and can be processed by injection molding. It is environmentally friendly, non-toxic, and safe, has a wide hardness range, has excellent coloring, soft-touch, weather resistance, and fatigue resistance. And temperature resistance can be recycled to reduce costs.
With the increasing awareness of environmental protection, the relevant environmental protection regulations such as the EU RoHS standard and REACH regulations have been gradually implemented in the electronics and electrical fields. On many occasions, it is necessary to use thermoplastic flame retardant safe and clean wires and cables, which have both plastic TPE halogen-free flame-retardant cable material with rubber characteristics that have become the focus of research and development.
The TPE material based on SEBS, by adding a large number of inorganic flame retardants to improve flame retardancy, it is prone to low strength, easy precipitation, poor resilience, poor weather resistance, and fatigue resistance, and dripping and large smoke during combustion phenomenon. These reductions in comprehensive performance have affected the service life and operational safety of the product, and have limited the application of low-smoke, halogen-free, and flame-retardant TPE materials in the field of electronic and electrical connecting wires, especially the materials used for new energy charging pile cables.
At present, most of the insulation protection materials for automobile wiring harnesses at 105°C and below are PVC materials. Domestic PVC materials for automotive wiring harnesses often have the disadvantages of matt extrusion surface and poor low-temperature performance. Given this, in addition to the special environment (such as narrow space, poor heat dissipation, frequent mutual friction, etc.) and special requirements (thin-wall, high-speed extrusion, etc.) and cost control requirements used in automotive wiring harnesses, PVC materials for automotive wiring harnesses are studied It is necessary to further improve its performance.
As sales of electric vehicles soar, new energy vehicle charging pile companies are expected to share hundreds of billions of markets. Charging piles may be the most certain piece of cake in the current new energy vehicle industry chain.
Charging piles also appear in various parking lot communities. Slow charging is generally AC charging. The relatively large DC charging current requires high power facilities in the community. The characteristics of the charging pile cable are as follows:
1. The cable must have high voltage resistance, high-temperature resistance, electromagnetic interference resistance, stable signal transmission, oil resistance, water resistance, acid and alkali resistance, UV resistance, etc. for the signal control and transmission network system of voltage and current during charging.
2. The product has good concentricity, which makes the high-voltage performance of the cable stable and reliable.
3. The minimum bending of the product in 4D, which is convenient for use between corner wiring in a narrow space. The product has high flexibility, which is very convenient for vehicle wiring.
4. The rated temperature of the product is 125℃, which is a great technological advancement and improvement for the use of one-time molded soft-grade insulation materials, and it is very i