Chen Ziying, senior manager of Infineon Technologies, delivered a wonderful speech on the key technologies and application requirements of IGBT modules for electric commercial vehicles at the high-tech electric vehicle and electric logistics vehicle industry summit. He elaborated the standard system of IGBT and electric commercial vehicle. IGBT module application features and other content.
As a controllable power electronic switch, IGBT is mainly used in new energy vehicle drive systems, charging systems and other fields. Whether new energy vehicles can effectively reduce costs, whether vehicle energy efficiency can be improved, etc., are closely related to IGBT modules.
So, what are the differences in the application characteristics of IGBT modules in the field of electric commercial vehicles? At this stage, what are the requirements for electric commercial vehicles for IGBT modules?
On July 25th, Chen Ziying, senior manager of Infineon Technologies, who has been ranked first in the power semiconductor market for more than ten years, presented the "IGBT for electric commercial vehicles" at the summit of high-tech electric vehicles and electric logistics vehicles. The keynotes of the key technologies and application requirements elaborated on the standard system of IGBT and the application characteristics of IGBT modules for electric commercial vehicles.
â–²Infineon Senior Manager Chen Ziying
Many well-known, at present, China's automotive IGBT technology has just started, more than 70% of the domestic IGBT device market, especially high-end high-power semiconductors have long been monopolized by foreign companies. Among them, China's new energy vehicle IGBT module is basically from Infineon, Infineon's market share is about 70%.
Chen Ziying pointed out that IGBT is an indispensable power "core dirty" for new energy vehicles. The characteristics of high power, high withstand voltage and good energy saving effect determine that IGBT is the mainstream technology of high-end power semiconductors for a long time in the future.
“Compared with consumer-grade IGBTs, automotive IGBT modules have a series of special requirements.†Chen Ziying said that on the one hand, the car itself is a constantly changing subject, including changes in load and climate, and the vehicle may be affected. At the same time, this series of changes will affect the life of IGBT devices.
On the other hand, in addition to the changes in load and temperature, the IGBT module for vehicles requires higher performance, higher switching frequency and stronger vibration resistance.
In general, the application technology characteristics of electric commercial vehicles are frequently changing loads, large temperature changes caused by cold start, vibrations at different installation positions, and relatively high modulation frequencies.
Chen Ziying said that the above application characteristics of electric commercial vehicles have brought many challenges to IGBT modules. For example, the temperature change of the solder layer between the DCB and the substrate will cause the termination of the life of the IGBT module once the solder layer falls off.
The data shows that IGBT accounts for more than 40% of the total cost of the motor controller, accounting for 8%-10% of the cost of the new energy vehicle. Among them, most of the components used in China's new energy vehicle motor controllers are imported, resulting in the cost of China's motor controllers being 1.2-1.8 times higher than that of foreign countries. It is reported that the highest proportion of motor controller procurement costs is IGBT products.
Chen Ziying said that because of the high cost and performance requirements of electric commercial vehicles. Infineon has developed an IGBT product for electric commercial vehicles that uses pre-coated thermal materials to save 19 euros in material, space and production man-hours with the same quality and reliability. At the same time, the product has a longer life.
What needs special mention is that this conference won the strong support of Yuebo Power, BAK Automotive, Mengshi Technology, Hualiyuan, Yida Electric, and attracted SF, Jingdong, Yuantong, Yiwei Group, etc. Ten logistics companies and operators, as well as hundreds of guests from dozens of well-known domestic commercial vehicles and core parts companies such as Dongfeng, Dongfeng Special Auto, Kairui Auto, Xinchufeng and BAK Automotive gathered together.
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