To Power the Future, Carmakers Flip on 48-Volt Systems

from NYTs

While automakers sketch out a world of sleek and silent electric cars or even self-driving pods that are more den than dragster, the all-electric future is further off than it may appear.

Car companies, starting with Volvo last summer, have laid out plans to electrify entire lineups of vehicles. But the fine print makes it clear that the coming decade and beyond will focus not just on massive battery packs powering electric motors, but also on adding a little extra juice to the venerable internal combustion engine.

Increasingly, that juice will arrive in the form of new electrical systems built to a 48-volt standard, instead of the 12-volt systems that have dominated since the 1950s. Simpler than Prius-type drivetrains and less expensive than Tesla-scale battery power, the new electrical architecture both satisfies the demands of cars made more power hungry by their gadget load and enables the use of lower-cost hybrid drive systems.

Earlier proposals to take cars to a 42-volt standard fizzled for cost reasons, but recent regulatory developments and the hardware that will one day make autonomous cars feasible have reignited the urgency.

Besides the drop in battery prices and control electronics, other factors have made 48-volt technology worth re-examining, said Jürgen Wiesenberger, director of the hybrid electrical vehicles unit at Continental North America. “The market was not ready for them in the past because of cost, but the 2013 fuel price spike changed that,” he said.

In limited ways, 48-volt systems have already found their way into vehicles, including the Porsche Cayenne and Bentley Bentayga S.U.V.s., where they operate the antiroll bars that keep the body level when cornering hard.

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One Response to To Power the Future, Carmakers Flip on 48-Volt Systems

  1. Justin February 15, 2018 at 1:29 am #

    Car companies are starting to replace the 12-volt battery system with the new 48 volts system, which it offers more gas mileage and more power at low RPM. At this day, a lot of new cars are equipped with a lot of new technology, most of the new technology is power by electricity, such as the new infinite Q50, the car is steered by wire, which it means the fronts wheel are turning by electricity and there are no mechanically driven components connect the steering wheel to the front wheel. Especially with the new high-end luxury cars, a lot of the moving component in the luxury cars are power by electricity. The new technology put a lot of the stress on the traditional 12-volt electrical system and cause fuel efficacy problem. The new 48-volt system will help accommodate the electric need for the new technology and increase engine output.
    In the early 2000s, some of the car makers proposals the 42-volt system to replace the 12-volt system, however, the proposals were turned down due to costs. When the 2013 fuel price spike hit, it changed everything; people are more desperate for better fuel efficacy then every. The automakers start bringing the old proposals back to the table, in 2017 the Mercedes Benz bring back the straight line six (M256) with the 48 volts system the S-class. The new 48-volt system power electric AC compressor, which can run full bore when the engine is off or when it’s idling. And to the electric water pump, which generates twice the power and flow of a conventional belt- or gear-driven water pump. That increases cooling capacity, safely allowing greater power density in the engine, and it allows the pump to be operated irrespective of engine speed. There isn’t a belt anywhere on the M256, which means reduced noise and vibration. According to Mayersohn, the new 48-volt system only cost 30 percent of the full hybrid system will cost. Ms. Gustanski said the 48 volts system would cost an automaker between $650 and $1,000 to add to the vehicle and the full hybrid systems will cost $3000. The mild hybrid system will dominate the auto market before all cars become electricity fully. The 48 volts system will not just for cars; it will also be available for trucks and possible on the 18 wheeler too. The major’s car makers like Dodge and Volkswagen group had already come out there own 48 volts system. https://www.nytimes.com/2018/02/08/business/electric-cars-48-volts.html
    https://jalopnik.com/everything-you-need-to-know-about-the-upcoming-48-volt-1790364465

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