Electronics

View of the world of EV charging

Avnet’s Director of Sales for Lighting and Transportation, Jason Scotzen, explores the infrastructure needed to charge millions of vehicles in homes and public spaces.

As a global organization, Avnet has privileged insight into how EV charging infrastructure is evolving around the world. Governments and private companies are pushing the move to full battery electric vehicles (BEVs) and gaining momentum. However, not all regions are developing infrastructure at the same rate.

The dynamics of refueling an internal combustion engine vehicle is fundamentally different from powering a BEV. At the very least, a public charging point will be installed next to the fuel pump. The obvious difference, however, is the time frame for refueling and recharging. This creates a demand for more charging points, not just petrol stations.

Harvey Wilson, Avnet Silica Systems Engineer working in EMEA, said: With this, the number of charging points will reach 300,000 by 2030, which is five times the number of fuel pumps in the UK. ”

According to Statista data, China now has more fast and slow charging points than any other region. Avnet’s sales director for China, Tom Wang, said the number of charging points is growing rapidly, growing by about 50% annually over the past three years. he said: The ratio of vehicles to charging points in China is about 3:1. ”

Typical electric vehicles are family cars, buses, or delivery trucks, but personal mobility vehicles with two or three wheels are preferred in India. This is where the electrification movement is most felt today. As a result, the charging market is turning to small private car ACDC chargers. Avnet’s Supplier Product Marketing and Field Application Engineering His Asia Associate His Director Sambit Sengupta said that the battery-as-a-service for this class of last-mile vehicles is to some extent behind the concept of his model. There is momentum.

In North America, things are a little different. Jason Skoczen, director of business development manager at Avnet America, said demand for charging stations to support a wider range of electric vehicles, including commercial vehicles, motorcycles and even commercial, construction and agricultural vehicles (CAVs). reported to be increasing.

The European Union’s Fit for 55 target calls for at least 60% of all road vehicles to be fully or partially electric by 2030. At that time. Germany aims to have 1 million charging points by 2030, compared to just 50,000 at present.

Certification of EV charging infrastructure is defined in the ISO 15118 standard

Avnet Abacus Central Europe Sales Director Tobias Nakel reports on market activity from several angles. He also reports on fragmentation, with many mid-sized companies bringing new and innovative designs to market.

While we need to increase the number of charging points, we also need to address diversity. Fast DC chargers are convenient for motorists, but may be essential for freight and mass transit vehicles.

Fast DC chargers require DCDC converters that can operate continuously at higher voltages. Partial discharge immunity is also important when switching high voltages. As it relates to gate drivers, isolation barriers are a known weak point in high voltage circuits. Similarly, the isolation capacitance of the DCDC converter should be lower than the engineer specifies. Physical distance between SiCs or IGBTs, gate drivers, and converters is also an important design consideration.

Security is another requirement and is addressed in specifications such as ISO15118:20. They should be studied closely and implemented correctly. The latest version supports multiple contracts and increases the overall level of security imposed.

Other considerations include choosing the right output power level for each market. For example, not all EVs can be directly connected to DC power. Charging point operators must understand the demands of their particular public site and work with electric vehicle supply equipment manufacturers to install appropriate solutions.

Since most installations have multiple charging points, there is a need for load balancing, such as controlling and optionally limiting the power supplied to specific locally connected charging points. If this is not implemented, grid surges will quickly become unsustainable.

The growth momentum of EV charging is creating new opportunities. Avnet Embedded, which works with OEMs to provide turnkey solutions, has seen a significant increase in the number of electric vehicle supply equipment manufacturers over the past two years, and expects this growth to continue for several more years.

www.avnet.com

https://electronics-sourcing.com/2022/08/05/a-global-view-on-ev-charging/ View of the world of EV charging

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