“Caif will launch the first batch of 800V SiC power electronic systems in the production of the first batch of customers this year.”

“We are ready to produce mass production in China and Europe.”

Recently, Qifu released the latest news of its 800V power electronics. When the world’s increasing car enterprise tries to introduce an improved car power system to meet the faster charge speed of electric vehicles, the 800V high-voltage electric drive system has become a new high-end demand. Coifer, through earlier entry, racing applications, and cooperation with semiconductor companies to master the technology. In 2021, it was its 800V power electronics in the batch application market.

Batch production in two major markets in China

Power electron is an important part of the power transmission system, and the main task is to convert power. It has always been produced in batches of 400V power electrons. However, it synchronizes the development of a voltage higher electric drive system, and provides new core technologies.

According to the NE era, Qifu is currently importing multiple 800V projects into production. Among them, it provides 800V three-in-electric drive systems for a variety of models of China OEM, including power electrons. This OEM is likely to be a sports car brand under Geely; serving a 800V power electronic system for a European sports car manufacturer.

It uses new chip technology in 800V power electronics: instead of Si group with SiC-based power devices. Compared to silicon (Si) techniques employed in traditional electric vehicles, silicon carbide (SiC) power devices can improve the battery life, improve their performance and shorten the charging time.

According to the information previously released by EF, the 800V SiC three-in-electric drive system will increase 33% in output power, and the weight is reduced by 25%, and the peak efficiency is 11%.

The first SIC power electronics in Take Fer is in the Formula E Racing Series. As a Power General Assembly Partner of the French Wen Tuuri Venturi, Mahinda Racing’s power assembly partner, EF provides a complete transmission system for the team, including motor, gearbox and silicon carbide power electronic system. From it, it obtained the application experience of the SiC electric drive system. Today’s China-EU 800V project is reflected in that it is incorporated into a broader development and mass production, preparing for future passenger cars.

Electric high end, sports car and 800V

The Bert Hellwig, which is responsible for electric system development, “It is obvious that the future high-end electric vehicle or electric sports car will use 800V architecture, and 400V architecture will still be the standard of the popular market. For many years, we have been mass production, 400V technology, this year, we are preparing for the production of 800V applications. “

Why is the high-end electric vehicle or electric sports car to 800V SiC power electronics first-use models?

Observing new car strategies in the past two years, high-end electric vehicles are generally a great window for car companies to show ultrafast chargers and acceleration capabilities. Such as Porsche Taycan, Audi E-Tron GT, Tesla Model 3, and Geely Lotus in the above, the ultra-fast charge acts as a selling point, attracting everyone’s eyes.

Charging time plays an important role in ease of use of electric vehicles. If the electric vehicle becomes sustainable at a longer distance, the battery must be able to reach almost full of electricity within an hour. The basic problem of rapid charging is the heat generated by higher current. This requires that the cable is designed to be more coarsely or cooling, which will increase the weight of the vehicle and the complexity of the charging infrastructure. Therefore, the best solution is to develop a new in-vehicle power architecture that is intended to achieve higher performance.

European car companies, Tesla, 350kW ultra-fast charging network, using a new car power system. In order to ensure that power loss is lowered during DC charging, the charging voltage should match the battery voltage, and the voltage of the entire propulsion system should also match each other. In this sense, 800V power electron will become more and more standard in high performance electric vehicles.

In this representative, Porsche Taycan configured a full 800V power transmission system, battery system, including electric drive, power electronics, and electric power assembly of electric power and charging system, both match 800V voltage.

In addition, the price of high-end cars and sports cars is high, and only they can be divided into silicon carbide devices that are highly high in trial prices.

At this time, some people may be proposed: Modern Ioniq 5 (starting at 5,000 pounds in the UK) and Asia EV6 will introduce a mass production model using the 800V voltage system. This is an attempt to modern cars. But as Hellwig said, the model such as Ioniq 5 is still exception, and very state. Taycan, Audi E-TRON GT may be normal.

Back semiconductor company is constantly

On the road of EF development, application 400V and 800V electric drive system, many semiconductor companies, Roma, Cree, Danfoss Silicon Power, Visic Technologies.

In April 2019, EF’s first use SIC technology’s electric drive system has been used in French Texturi Venturi’s electric racing, and its SiC power module comes from Rom. The inverter uses a full SIC module composed of SiC MOS and SIC SBD. Compared to traditional inverters, its output power is increased to 220 kW, and the weight is reduced by 6kg, and the size is reduced by 43%. In November 2019, Qifu has reached a cooperation with Cooperation and Danfoss.

Through the strategic cooperation with Cooperative, EF wants to develop high-efficiency electric transmission equipment, which plans to officially launch the SiC Electric Power System in the market before 2022.

Cooperative Silicon and Silicon Carbide in Qifu and Denfos is a further continuation of cooperative relationships. Danfoss not only provides 400V standard products to EF, but also between the two parties to jointly develop 800V silicon carbide power modules for large quantities production projects.

Even the Danfoss’s power module can also use the power chip developed in cooperation with Cofue and Cooperative.

In May 2020, Qifu has reached a cooperation with Israeli Visic Technologies to develop EV inverters based on GaN semiconductor technology, and the key application components will be 400V drive systems that cover most of the electric vehicles.

Similar cooperation frequently appeared between electric drive suppliers, vehicle factories, and semiconductor companies, set off a battle for a field technology. [End]

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