In order to reduce the impact of motor vehicles on the environment, to meet the fuel economy and carbon dioxide emissions related to the requirements of legislation. The implementation of hybrid and electric cars is a good choice for car manufacturers. The next few years, the global demand for such alternative energy vehicles will grow.
However, electric vehicles bring environmental protection at the same time, there are also their own imperfect factors. How to shield the electric vehicle when the high-voltage operation of the electromagnetic wave problems, as well as electric vehicle wiring harness interference, wiring harness and connector sealing performance problems. So in the design and development of hybrid and electric vehicles, these problems need to be resolved, otherwise it will produce security risks.
Electromagnetic wave shielding, wiring harness interference solution. Hybrid cars have attracted much attention due to their fuel economy, but at the same time it has posed a problem for automakers, which is electromagnetic interference (EMI). It is always necessary to optimize the electromagnetic interference with electronic modules and harness designs, even in 12V systems. This harmful noise can interfere with radio reception and other vehicle signals such as AM / FM radio frequency, mobile phone use and Bluetooth performance. Hybrid electric vehicles must rely on high current high voltage inverter to drive. But the high-power inverter will produce electromagnetic interference in the frequency range of 100.0kHz to 200.0MHz. The high-power AC and DC conversion of these inverters makes the electromagnetic interference problem of hybrid vehicles more serious.
In contrast, when the AC power is converted to direct current, the battery pack is charged, the weight of the electronic device is lighter, and thus the performance of the transformer is superior to that of the transformer. In fact, the electronic device is currently the only viable technology for AC and DC conversion, driving the vehicle with a battery pack. However, these electronic devices will produce more electromagnetic interference, because the high-voltage wiring harness will act as an electromagnetic interference antenna, the electromagnetic interference transmitted to the entire body.
Conventional vehicles, the most effective way to suppress electromagnetic interference noise is often the use of capacitors, sensors, diodes and other components. But now, shielding electronic modules and harnesses becomes a more economical solution for hybrids because it is smaller and lighter than traditional suppressors.
Harness connector for the use of security problems.
To ensure the safety of drivers and maintenance technicians in high-pressure environments, we must consider a number of complex factors in the electrical system to ensure reliability and optimality. The connection system is a key component of a high voltage electrical wiring harness, especially a high power line harness design. From the safety point of view, high voltage connection system design should pay attention to two aspects, namely high voltage interlock circuit (HVIL) and the connector of the environmental seal (in the vehicle to avoid short-circuit between the high-voltage terminals).
Electric car on the harness design requirements!