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The high voltage system of electric vehicle has high voltage and high current circuit. Its safety and importance are self-evident. If human body contacts, it may cause injury. Therefore, the design and layout of high voltage harness of electric vehicle is very important. In addition, green travel is a concept advocated now. Now the short-distance public transport travel mode is gradually replaced by new energy vehicles, which requires higher requirements for the high-voltage cables of new energy vehicles. Here is a brief introduction to the high-voltage cables of new energy vehicles. High voltage cables are mainly composed of sheath, braid and tape, conductor and insulation (from outside to inside). Of course, considering the harsh environment where high-voltage cables are located, the requirements for different places are also different. For voltage: the main difference from common automobile cables is that the frame needs to be set according to the rated voltage of 600V. If it is applied on commercial or bus, the rated voltage can reach 1000V, which may be higher than that; The cables now used in cars driven by internal combustion engines are designed to have a rated voltage of 60 V; For temperature: at present, in addition to the higher temperature sent to the engine room or high temperature cabin in the vehicle, the withstand temperature of other electric furnaces often used is up to 105 ℃, while the high-voltage cables used in new energy are usually higher than the ordinary value, such as 125 ℃ or 150 ℃. Different places have different requirements for cables. Service life: the recognized cable standard is 3000h, which is often used in long-term aging test. There will be special requirements for those used in the high-voltage field, which may exceed 3000 h, and the cumulative operation time at the specified temperature may even reach 12000 h; Safety signs: high voltage power will bring certain risks to users. High voltage cables should be visually distinguished from ordinary cables, and safety warning signs should be marked at the same time. For more EV HV Cable and electric vehicle High-Voltage cable, please visit OMG official website: https://www.omgevcable.com/ <a href="https://www.omgevcable.com/">omgevcable</a> |
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New energy vehicles have become a convenient way of travel in our life. The charging pile used to supplement power to new energy vehicles is also the norm in our life. The charging pile can be seen running in public places such as companies and communities. However, what are the characteristics of charging pile cable materials? The following can give you a brief introduction. As a bridge connecting the pile and the vehicle, the performance of the charging pile cable is very important. In addition to the outdoor performance of basic cables such as insulation and flame retardant, the overall hardness of the cable should not be too high because it should be bent frequently. The so-called charging pile cable material generally refers to elastomer related materials, which are used for insulating layer and sheath layer. Material performance requirements include oil resistance, tear resistance, weather resistance, chemical resistance, high and low temperature resistance and softness. At present, TPU, TPE and PVC Elastomer are the mainstream. The following briefly introduces the characteristics and differences between TPU and TPE. The English name of TPU is the abbreviation of thermoplastic polyurethane, which means thermoplastic polyurethane. It is characterized by high strength and good wear resistance, which can not be replaced by other TPE materials. The wear resistance and strength of TPU are much better than TPE, but the hand feel is not as good as TPE. At present, the softest hardness of TPU is about more than 55A. The main characteristics of TPU are: a wide range of hardness, and with the increase of hardness, its products still maintain good elasticity and wear resistance, high mechanical strength, outstanding cold resistance, good processing performance, oil resistance, water resistance, mold resistance and good recycling. The elastic loss of TPE is larger than that of TPU under high hardness. TPE English name is the abbreviation of thermoplastic elastomer, which means thermoplastic elastomer. It is a kind of special functional materials with plastic plasticity and rubber elasticity. Thermoplastic elastomer TPE has the characteristics of high elasticity, high strength and high resilience of rubber, as well as injection molding processing. It has the characteristics of environmental protection, non-toxic and safety, wide hardness range, excellent coloring, soft touch, weather resistance, fatigue resistance and temperature resistance. It can be recycled and reduced cost. TPE material based on SEBS can improve the flame retardancy by adding a large amount of inorganic flame retardants. At the same time, it is prone to low strength, easy precipitation, poor resilience, poor weather resistance and fatigue resistance, dripping and large smoke in combustion. The reduction of these comprehensive properties affects the service life and operation safety of the products, and limits the application of low smoke halogen-free flame retardant TPE materials in the field of electronic and electrical connecting wires, especially the materials for new energy charging pile cables. At present, most of the insulation and protection materials of automobile harness with temperature grade of 105 ℃ and below are PVC materials. PVC materials for domestic automobile harness often have some disadvantages, such as poor extrusion surface and poor low-temperature performance. In view of this, combined with 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 of automobile harness, it is necessary to study the PVC material used for automobile harness and further improve its performance. With the continuous enhancement of people's awareness of environmental protection, EU Rosh standards, reach regulations and other relevant environmental protection regulations have been gradually implemented in the electronic and electrical fields. Thermoplastic flame retardant, safe and clean wires and cables must be used in many occasions, and TPE halogen-free flame retardant cable material with plastic and rubber characteristics has become the focus of research and development. To learn more about EV cable and charging pile cables, please visit OMG's official website: https://www.omgevcable.com/ |
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In fact, there is no strict boundary between wires and cables. Generally, products with few cores, small diameter and simple structure are called wires, those without insulation are called bare wires, and others are called cables; The conductor with larger cross-sectional area (more than 6 mm2) is called large wire, the smaller one (less than or equal to 6 mm2) is called small wire, and the insulated wire is also called cloth wire. The wire is composed of one or several soft wires, which are covered with a light and soft protective layer; The cable is composed of one or several insulated conductors, which are wrapped with a tough outer layer made of metal or rubber. Cables and wires are generally composed of three parts: core wire, insulating sheath and protective sheath. The characteristics of common cables are as follows: CEF - ethylene propylene rubber insulation, neoprene sheath, marine flame retardant power cable. CVV - PVC insulated, PVC sheathed marine flame retardant power cable. BV, BX, RV and RVV series wires are often used for oxygen cabin wires, including: Bv - copper core PVC insulated wire, with long-term allowable temperature of 65 ℃, minimum temperature of - 15 ℃, working voltage of AC 500V and DC 1000V, which can be fixed indoors and outdoors, and can be laid in open or concealed. BX - copper core rubber insulated wire, the maximum service temperature is 65 ℃, which is applied indoors. RV - PVC insulated single core flexible wire, with maximum service temperature of 65 ℃, minimum service temperature of - 15 ℃, working voltage of AC 250V and DC 500V, used as internal wiring of instruments and equipment. RVV - copper core PVC insulated and sheathed flexible wire. The allowable long-term working temperature is 105 ℃, and the working voltage is 500V AC and 1000V DC. It is used in wet, high mechanical protection requirements, frequent movement and bending. To learn more about EV cable and charging pile cables, please visit OMG's official website: https://www.omgevcable.com/ |
