EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
Language
EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
The application scenarios of new energy cables mainly include in-vehicle cables, charging guns/charging piles and on-board charging. The high-voltage wiring harness in the car mainly provides high-voltage and strong power for new energy vehicles. They are high-safety components of new energy vehicles, with the characteristics of large voltage/current and large line diameter, which also makes the design of high-voltage wiring harnesses in new energy vehicles face many challenges. Today, let's take a look at the wiring harness design and wire requirements of new energy vehicles. 1. The basic characteristics of the high-voltage wiring harness in the car. 1. High voltage/high current. The battery voltage of new energy vehicles can reach 600V, and the corresponding wire voltage level can reach 300A. The battery voltage of traditional fuel vehicles is generally 12V, and the corresponding wire voltage level is less than 60V. 2. There are many wires with large diameter. New energy vehicles need to use large-diameter wires in high-voltage batteries, inverters, transformers, low-voltage batteries, air-conditioning compressors, etc., and the number is very large. Second, the challenges faced by the high-voltage wiring harness in the car. Due to the number of high voltage/high current and large diameter wires, harness design presents challenges in safety, routing, shielding, weight and cost. Facing these challenges, we have summarized some countermeasures. 1. Safety In the face of safety challenges, some countermeasures need to be taken in the selection and sealing of automotive wires. 2. The layout of the high-voltage wiring harness in the wiring vehicle has the following requirements: (1) Under static load conditions, the minimum turning radius of the outer diameter of the wire is 4 times; (2) Under the condition of dynamic load, the minimum turning radius of the outer diameter of the wire is 8 times; (3) The minimum distance between the high and low voltage wires shall not be less than 100mm; (4) The distance between the outlet end of the high voltage connector and the first fixed point shall not be greater than 100mm, and the distance between adjacent fixed points shall generally not exceed 150~ 200mm; (5) The high-voltage wiring harness should be arranged at the bottom of the vehicle as much as possible; (6) The wires should be flexible wires such as silicone rubber and flexible cross-linked polyolefin wires. 3. Shielding Taking into account the factors of electromagnetic interference, the entire high-voltage system is covered by a shielding layer, because of the electromagnetic field interference caused by the high voltage and large AC of new energy vehicles, and the electromagnetic interference caused by the rapid switching of electrical components. Then, the measures for shielding electromagnetic interference of high-voltage wire harnesses include: (1) Select shielded wires. The ultra-high current and voltage of electric vehicles will produce a large electromagnetic induction phenomenon during operation. If the electromagnetic shielding problem is not well resolved, it will inevitably affect the performance of automotive electronic equipment. Therefore, choosing shielded wires as high-voltage wires for electric vehicles is a good choice for electromagnetic shielding. The shielding wire is braided from multiple strands of tinned annealed copper wire. Thin copper wires maintain design flexibility with over 90% coverage. In order to meet the processing requirements of wire opening and stripping, it is necessary to control reasonable insulation and sheath stripping force. (2) It is overall shielded, and the wire is unshielded. It is mainly used for Japanese OEMs at present. Bundleshielding refers to the use of a light braided metal shielding layer outside the wiring harness as a shielding member to prevent electromagnetic interference. .
Recommend:
