Decentralised 48V power for EV challenges

30th April 2020

Vicor UK

Alex Lynn

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Whitepaper

Manufacturers of cars, trucks, buses and motorcycles are rapidly electrifying their vehicles to increase the fuel efficiency of internal combustion engines and reduce CO2 emissions. There are many electrification choices, but most manufacturers are opting for a decentralised 48V power mild-hybrid system rather than a full-hybrid powertrain.

In the mild-hybrid system, a 48V battery is added alongside the traditional 12V battery. This increases power capability by 4x (P = V • I), which can be used for heavier loads, such as the air conditioner and catalytic converter at start up. To increase vehicle performance, the 48V system can power a hybrid motor that is used for faster, smoother acceleration while saving on fuel.

The additional power can support steering, braking and suspension systems, plus add new safety, entertainment and comfort features. Introducing a 48V mild hybrid system has tremendous upside once designed-in. Overcoming the hesitancy to modify the long-standing 12V power delivery network (PDN) may be the biggest challenge.

Changes in power delivery often require new technologies that need extensive testing and may require new suppliers that can deliver on the automotive industry’s high safety and quality standards. But the advantages far outweigh the conversion cost as the data centre industry is discovering as it moves to a 48V PDN.

For the automotive industry a 48V mild-hybrid system provides a way to rapidly introduce new vehicles with lower emissions, longer range and higher gas mileage. It also delivers new and exciting design options for higher performance and features while still reducing CO2 emissions.

Download the whitepaper to read more.