Automotive Engineering - March 2024 - 22

EV energy
management
POWERS-UP
COVER STORY
the next generation of the device can handle higher temperature.
That means you can have a smaller cooling circuit. "
Medisetty added that development of higher-voltage EV platforms
may help to literally take some heat off power-electronics
cooling concerns. " Heat is a factor of the current that you're pushing.
At 800 volts, you actually have a lower current; if all things
being equal, the power levels are the same, the current is lower on
the 800-volt side, " he said. " Typically, you go to 800-volt because
you are already at the limit of the currents that you can push
through, so you want to go to higher currents. What we look at is
to try to optimize the inverter design such that you can shrink the
size of the inverter, the cooling circuit - and take cost out. That's
what we are focused on. "
To make a difference, research and eventual production-vehicle
Fourth generation of Bosch's EV motor inverter.
but at the same time we are very cost-conscious. So
this mass market acceptance of electric vehicles will
depend on how we can drive cost out.
" We continue to look at how can we optimize the
device to require less cooling but not add costs. We
continue to drive to higher device temperatures, so
components have to find a home in vehicles people want. After decades
of watching power electronics improve, Oak Ridge's Ozpineci
said he knows who will be pushing hardest for change.
" There are some smaller and newer companies that are willing to
adopt these technologies faster than traditional companies, "
Ozpineci said. " New companies showing up in the EV space, they
don't have all these investments for the old technologies, and they
said, 'Okay, well, there's this new technology that might be really
beneficial. Why don't we start from there?' "
Additional reporting by Bill Visnic
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22 March 2024
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Automotive Engineering - March 2024

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Automotive Engineering - March 2024 - INTRO
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