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That is a lot of batteries...

Doug Houseman's picture
Visionary and innovator in the utility industry and grid modernization Burns & McDonnell

I have a broad background in utilities and energy. I worked for Capgemini in the Energy Practice for more than 15 years. During that time I rose to the position of CTO of the 12,000 person...

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  • Jul 1, 2022
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Chatted with a truck manufacturer about class 8 trucks yesterday and discussed the sizing of the batteries on the truck.

This manufacturer is looking at 800 or 1200 KWH for a long-haul semi-truck. They are also setting the truck up for dual (2) 500 KWH chargers.

With the charging profile they are planning that is roughly a 2 hour charge when hooked up to both chargers.

The good news for the grid is it will take about 15 minutes to come to full charge in the summer and up to 30 minutes in the winter. Ramp down may take as much as 45 minutes, depending on the battery temperature. Batteries will be liquid cooled.

Based on other information (none of what is below was discussed):

800 KWH will be approximately 8,000 pounds (4 tons)
1200 KWH will be approximately 12,000 pounds (6 tons)

Likely the system will run at between 1,000 and 1,200 volts.

Based on time studies, it is likely a 4 hour process to swap the batteries.

It will be interesting to see how this evolves.

OBTW - an average truck stop refuels between 200 and 1,200 trucks a day (I-80 in Iowa is 5,000 a day) - at 50% charger on 800KWH semi, that is 80 MWH at the low end and 480 MWH at the high end with roughly eighty (80) 500 KW chargers at the low end and 500 at the high end.

New substations anyone?

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Jim Stack's picture
Jim Stack on Jul 1, 2022

Yes the batteries used for trucking is a very large pack. The Fast Charging is a huge amount. But having a large storage battery and renewable energy like Solar at the charging hub is key. Tesla and others are even doing the Renewables and Storage at large car charging sites. It really pays off but that requires EVen more batteries.  

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