Automobile certification

Today's automobile design power subsystem is a quite complex job.Why is complicated?For modern automobile, engine or motor power, the power supply requirements are more complicated and more varied than ever before, as many as 100 cars are usually equipped with a programmable electronic control unit (ECU), in order to realize from the engine and powertrain, to the infotainment system, communications and security and auxiliary driving system overall effective control.As car technology in the more complex auxiliary driving system and the rapid development of the autonomous areas, the complexity of its design will only grow.

Therefore, the auto industry has replaced the computer and communications industry as power electronic system of the fastest growing market, it is no surprise.As the on-board power electronic components of increasing complexity and control function of expanding the range of the following several design factors become crucial:

• Stability and reliability.Power electronic components must be able to withstand everyday use strict test and tolerance in extreme temperature and humidity environment.
• Service life:Consumers want their cars have a longer service life and achieve decade or more, than the life of the cell phones and other electronic equipment is much longer.
• The perturbation resistance:In the car electronic components and systems must be able to coexist with each other, and not interfere with each other.

In order to ensure the electronic components in the embedded electronic systems after no longer fails, car industry has a strict components manufacturing and testing standards.Only in accordance with such standards of components can be used in car.

Major automobile certification standards

1. AEC - Q100 certification-AEC - Q100Is a kind of integrated circuit stress test method based on the fault mechanism.Automotive electronics association (AEC)In the United States, the initial, founded jointly by the three major automobile manufacturers, aims to build a common component certification and quality system standard.AEC - Q100 is a set of new product import process, the industry standard for product certification process changes, etc.
   
2. IEC60664-1- this standard specifies the electrical clearance of different size requirements, aims to help choose the appropriate clearance, enable it to two components under different voltage tolerance on the air gap between the maximum peak voltage.According to the paschen's law, and the air resistance maximum voltage performance related to pressure.For high altitude application, with the clearance and creepage distance about the effects of the size parameters is very important, because as the altitude increases, pressure decreases.Under the special environment parameters, through the solid insulation of the electric field stress depends on the structure of the device, can according to the applicable only 2000 meters elevation of product standards through testing program for validation.If the height of more than 2000 meters above sea level, we must to Ue, Ui, Uimp regulation parameters and Ie reassess.For example, in the 5000 meters above sea level 6000 meters below the runtime, correction factor of 1.48.
   
3. VDE0884-10- the standard focuses on that the maximum transient voltage, namely device under various test conditions, in the case of no insulation breakdown tolerated by the voltage.VIOTM, for example, by IEC 60747-5-5 and VDE 0884-10 is defined as an insulator in the absence of breakdown are peak transient voltage.This standard is based on the partial discharge test rather than the breakdown voltage, and based on the high voltage.
   
4. CTI 600 encapsulation materials- relative tracking index (CTI) is used to measure the electrical breakdown of insulation materials (mark) features.Up mark refers to the insulation material surface of electrical breakdown, the heat generated by the surface material carbonization.Carbide material was stronger than the original the conductivity of insulators, which would produce a larger current, more heat, even will eventually lead to complete failure.Equipment between two conductive parts, especially in high pressure parts and components and user can touch the parts of the surface of the insulating material between the minimum requirements of the CTI value of creepage distance depends on the insulator.

For more information, please refer toAutomobile applicationPage.