How to select high voltage connector for automobile?

In the new energy vehicle industry,High voltage connector It is an extremely important part, which is applied to the whole vehicle and charging facilities. The function of the connector is very simple: build an AC bridge between the cut-off place in the circuit and the isolated circuit to make the current flow and make the circuit realize the predetermined function.

High voltage connector The main application scenarios include DC, water temperature PTC charger, heating PTC, DC charging port, power motor, high-voltage harness, maintenance switch, inverter, power battery, high-voltage box, electric air conditioner, AC charging port, etc.

Electric vehicles have very strict requirements for the performance of connectors. High plugging times, current carrying capacity, CTI value, flame retardancy and vibration resistance are the key factors in enterprise product development. At present, the power requirements for the electric drive unit of new energy vehicles are higher and higher, and the requirements for the working current and voltage of the connector are also higher and higher. The traditional connection voltage is about 14V, while that of electric vehicles High voltage connection The voltage is about 400-600v.

meanwhile,High voltage connector Generally, the sealing of the is required to reach at least IP67, and even ip6k9k is required for some special occasions of the automobile, so as to ensure that the use requirements can be met even during high-pressure flushing.

New energy vehicles use a large number of power electronic equipment, and the electromagnetic field generated by high voltage and large current will produce electromagnetic interference to other communication equipment. The whole vehicle and parts must have anti-interference and anti radiation capabilities.

When designing the high-voltage electrical connection system, the connector is required to have a 360 ° shielding layer and be effectively connected with the cable shielding layer. The shielding layer covers the whole length of the connector to ensure sufficient shielding function and minimize the resistance between shielding interfaces. Within the product life cycle, the contact resistance of shielding connection is 10m Ω.

Therefore, new energy vehicles High voltage connector It is necessary to use new materials with high temperature and high pressure resistance. At the same time, they are also higher than traditional automobile connectors in terms of sealing, shielding and waterproof, and have higher requirements for flame retardant and CTI value (Delphi requires flame retardant of at least V0 and cti600), so the cost is also higher than that of ordinary industrial connectors. At present, high-voltage connectors in the market mostly use high-performance PBT, PA, etc.

At present, there are no special industry standards and national standards for new energy vehicle connectors, resulting in uneven product quality of high-voltage connectors. Generally, large and medium-sized enterprises basically have their own production experience and standards, but some workshop enterprises build the market at price, which is difficult to ensure the quality, resulting in some quality and safety hidden dangers in the selection and use of connectors.

In the electrical connection system, the quality of connector is particularly important, which is the key factor to ensure the safety and reliability of electrical connection.

As far as the global connector market is concerned, the market concentration is high, which is basically occupied by the United States, Japan, Taiwan and other countries. The world's top ten connector manufacturers account for more than 60%, and Tyco accounts for more than 20%.

Relatively speaking, Chinese manufacturers are mainly positioned at the middle and low-end products. The market share of China's top ten manufacturers is only 18%, and the industry concentration is far from that of foreign markets.

In terms of the domestic market, there are more than 1000 connector manufacturers in China, including about 300 foreign-invested enterprises and about 700 local enterprises. It is mainly concentrated in the Yangtze River Delta and the Pearl River Delta.

Shenglan Technology Co., Ltd_ It focuses on the production of electronic connectors and research and development of precision components. Its products are widely used in consumer electronics, new energy vehicles, USB, 5g and other fields. Its industrial lines cover the Pearl River Delta, Southeast Asia and other regions. It has established long-term strategic cooperation relations with well-known enterprises such as Foxconn, Lixun precision, Huawei, Xiaomi, TCL, Hitachi Group, BYD and Great Wall Motors, with IATF 16949, ISO9001 ISO14001, QC080000 and other system certification and product safety certification, and provide professional connection and manufacturing solutions for the industry http://jctc.com.cn/