Does anyone have experience protecting buses inside a parking garage that use lithium ion batteries?
I can't find any specifics on design criteria (or perhaps even looking at clean agent) for these types of large commercial vehicles. Thanks in advance! Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
12 Comments
9/29/2022 08:06:30 am
Yes, I would strongly caution the direction being proposed, i.e. clean agent systems. BEBs can be a performance based effort. Reach out here if you need help.
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Connor
9/29/2022 08:15:40 am
These buses likely have battery banks similar in size to a small lithium battery energy storage system (ESS). You may want to look at NPFA 855: Standard for the Installation of Stationary Energy Storage Systems for a starting point.
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Jesse
9/29/2022 08:30:29 am
I don't think clean agent is a viable option. I'm not sure how you'd be able to effectively seal the garage. And I'm not sure if you were meaning protecting inside the battery compartment of the bus - which would put it back to the manufacturer.
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Franck
9/29/2022 08:48:03 am
I concur with your point.
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Franck
9/29/2022 08:42:27 am
No specific standard for electric buses so far, to my knowledge. There's none either for electric car so far.
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Dan Wilder
9/29/2022 09:05:46 am
Closest thing will be from 855 (0.30/2500) to contain but a clean agent isn't going to help under normal concentrations (not to mention how to keep containment)...Li-Ion off gas their own flammable gasses so preventing and keeping the larger concentration of inert gas becomes very difficult. The larger battery packs also create a greater ability for a single cell event to extend through multiple adjacent cells. Even if you can prevent the fire from igniting, without stopping the cascading thermal runaway, you risk ignition/reignition hours or day later).
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Brian Cockburn
9/29/2022 06:50:15 pm
There's a similar forum post about e-bike Li-Ion batteries: https://www.meyerfire.com/daily/best-practice-to-address-e-bike-fire-concerns#comments
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Franck
9/30/2022 04:19:59 am
In the latest edition of NFPA 13 (2022), car parking even moved to OH Gr 2.
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Brian Cockburn
9/30/2022 11:31:04 am
I've seen those changes too. Here in BC, Canada we will use the 2013 ed. and we're moving to 2019 (eventually), but that still uses OH1 for parking garages.
Franck
9/30/2022 09:27:15 am
Another "intere'sting" loss for electric buses in Germany:
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David Williams
10/11/2022 10:06:07 am
Note that the insurance rating agency may have a more restrictive requirement than NFPA or other standards. We have experience where FM is calling for a higher rating than the language in NFPA Codes.
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Melanie Willhite
8/26/2023 10:50:31 am
I am seeing the same thing as David on the FM requirements being more restrictive than the NFPA codes. My research on this similar topic (specifically for EV charging stations in parking garages) revealed the following:
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