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ekstra   ara
 Post subject: Lithium Ion Battery banks in Electric Vehicle DC charger
PostPosted: Tue Oct 12, 2021 10:26 am 

Joined: Tue Oct 12, 2021 10:20 am
Posts: 1
All, Good afternoon. Please how are those doing AF studies for all the new EV charger installs modeling lithium ion battery energy? There doesn't seem to be good data/model equations for these. The mnfr data on these UL listed charger equipment are not forthcoming much with engineering data to do some first principles calcs? Please does NFPA 70E not cover such equipment? Talking to installers they have to commission these energized with 480VAC/3ph on the input side and 1000VDC on the output side. Appreciate any feedback. Thank you much.


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 Post subject: Re: Lithium Ion Battery banks in Electric Vehicle DC charger
PostPosted: Tue Oct 12, 2021 2:27 pm 
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Joined: Tue Jan 13, 2009 5:00 pm
Posts: 570
Normal arc flash calculations and PPE on the AC side based on the source. The charger can only supply charging current. A connected battery can supply short circuit current according to its resistance, different from vehicle to vehicle. I would suggest not doing energized work when charging.


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