Car-grade power inductors used in new energy vehicles
Hydrogen fuel cell vehicles use hydrogen or hydrogen-containing substances to react with oxygen in the air in the fuel cell to generate electricity to propel the vehicle. With the characteristics of cleanness, safety, long cruising range and fast fuel replenishment, all countries are actively developing hydrogen fuel vehicles.
In March 2022, the National Development and Reform Commission and the National Energy Administration jointly issued the "Mid- and Long-term Plan for the Development of Hydrogen Energy Industry (2021-2035)", which clarified the strategic position and low-carbon development direction of hydrogen energy. The "Technical Roadmap for Energy Saving and New Energy Vehicles 2.0" prepared by the China Society of Automotive Engineers predicts that in 2025, the number of hydrogen fuel cell vehicles in my country will be 100,000, and in 2035, the number of hydrogen energy battery vehicles is expected to reach 1 million. ?
As the world's largest hydrogen producer, China's annual hydrogen production capacity has reached 33 million tons. Vigorously developing hydrogen fuel vehicles has become an important national strategy. With the strong promotion of national policies, SAIC Maxus, Changan, Great Wall, Hongqi, Dongfeng and other manufacturers have successively developed and produced hydrogen fuel electric vehicles. Among them, SAIC Maxus launched and launched a self-developed hydrogen energy electric vehicle in September 2020. At the 2022 Beijing Winter Olympics, more than 1,000 hydrogen energy vehicles have been put into operation.
01-Characteristics of hydrogen fuel cell vehicles and inductor applications
Hydrogen fuel cell vehicles have high power and energy density, no pollution, zero emissions, no noise, high efficiency, and fast battery life It has features such as meeting heavy load requirements and being able to start in low-temperature environments. It is suitable for use as commercial vehicles such as buses, heavy trucks and trucks. In addition, hydrogen fuel has a wide range of sources and can be obtained by splitting water through wind energy, solar energy and nuclear energy. However, compared with traditional fuel vehicles, hydrogen fuel cell vehicles have many parts and complex layouts. How to prevent the various components in the system from interfering with each other is a big challenge.
So, as an important component of the power supply system of hydrogen fuel cell vehicles, what kind of power inductor can meet the requirements of hydrogen fuel cell vehicles?
In hydrogen fuel electric vehicles, inductors are mainly used in DC/DC converters, communication nodes of various systems, vehicle main control units, motor controllers, BMS battery management systems and other components (see block diagram in Figure 2 marked in blue). As hydrogen energy vehicles have more and more functions, systems become more complex, and integration becomes higher and higher, inductors are also developing in the direction of high efficiency, small size, and low noise
For hydrogen energy Body power system 12V-48V DC-DC converter, Kedajia automotive-grade super high current inductor VSRU series has the characteristics of high power, low temperature rise, etc., which can minimize the loss and meet the application of 12V-48V DC-DC converter. need. In addition to standard models, Kedajia can also customize other sizes of automotive-grade high-current inductors according to customer needs.
For BMS battery management systems, Kodajia’s automotive-grade integrated inductors VSAB1365, VSAB1770 series, VSBX1809 and high-current inductors VSRU series have multiple product models to meet the needs for inductor performance and size. Among them, VSAB automotive-grade one-piece inductors have the characteristics of low loss, high efficiency, wide application frequency, and strong anti-electromagnetic interference ability.
For motor drives, Kodajia’s automotive-grade integrated inductors VSAB1770, VSBX1809, VCRHS128/1210 and other series can meet the needs of motor controllers for high power and high power density, and can be customized according to user needs. Developed magnetic bar inductor.
02-Hydrogen fuel cell vehicle inductor demand trend
1. Hydrogen fuel cell vehicle electric drive system requires high power density, low loss power inductor
In order to adapt In order to meet the mounting requirements of different vehicle models and save system costs and installation space, the trend of integration of automobile electric drive systems is becoming more and more obvious. Three-in-one electric drive or even multiple-in-one electric drive platforms have become the development trend of new energy vehicles. Correspondingly, the integration of automotive electronic powertrains, control modules, and system software have also put forward higher technical requirements for the power density, size, loss, and voltage resistance of power inductor products.
For example, inductor products that require higher power density, smaller size, strong anti-interference ability, high current resistance and high voltage resistance.
2. The inductor required for hydrogen fuel cell vehicles must have strong anti-electromagnetic interference capabilities
High-voltage and high-current high-power electronic conversion devices and drive motors are used in hydrogen fuel cell vehicles. There are many electronic and electrical equipment on the car. The high-speed switching of DC/AC, DC/DC converters and IGBT power tubes in the system will cause high-speed changes in voltage and current, as well as surge current and peak voltage, causing radiation interference; in addition, the inductor The current is prone to high-frequency oscillation, and the frequency of the clock crystal oscillator inside the control unit in the system will produce high-frequency noise. These factors will produce electromagnetic interference. If this electromagnetic interference is not handled well, it will seriously affect the communication between the vehicle controller and CAN, resulting in CAN communication. Frequent error reports and unable to communicate normally. Inductor products used in hydrogen fuel cell vehicles need to have excellent anti-electromagnetic interference capabilities.
03-Kodajia recently launched a new generation of flat wire super high current inductors for hydrogen fuel cell vehicles
Kodajia has conducted an in-depth study of the technical needs of hydrogen energy vehicles for inductor products. , launched the VPEH series of automotive-grade super high current inductors, and has successfully cooperated with hydrogen fuel vehicle manufacturers and applied them in hydrogen fuel cell vehicle on-board controllers.
The VPEH series is a newly upgraded automotive grade inductor based on Kedajia CPEX super high current inductor. The product adopts Kedajia's self-made metal magnetic powder core and flat coil design, magnetic shielding structure, and strong anti-electromagnetic interference ability. The compact and high-power density structural design greatly saves the PCB installation area. VPEH series automotive grade super high current inductor products are made of high flux core material, with excellent DC bias capability and low AC loss. The products are suitable for applications with high ripple current and high voltage. The VPEH series withstands voltage Up to 2600V ac, and the electrical characteristics are very little affected by the ambient temperature. It is suitable for complex application environments such as high temperature, high voltage, and large current of hydrogen energy vehicles.
In addition to the standard series, the VPEH series electrical parameters can also be customized according to the special needs of customers, and can provide AEC-Q200 test certification.
Kedajia Electronics has been focusing on the R&D and manufacturing of power inductors for more than 20 years. The core materials are independently developed and the flat wire super high current inductor product technology is in a leading position in the world. Kedajia Electronics' automotive-grade inductors are manufactured in a factory certified by IATF16949. The company has a CNAS-accredited laboratory that can conduct testing in accordance with the AEC-Q200 passive component product verification standard.
Faced with the diversified and differentiated needs for circuit configurations in the field of hydrogen energy vehicles, Kedajia Electronics works closely with automotive electronics R&D engineers to tailor various automotive grade inductor products for customers.