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Thanks for the reply, Ravi. If Bosch is actually certified to 2849 (even if they were grandfathered in), they should show up here, right? Here are the existing Listee companies that have ULS Listed e-Bikes: https://productiq.ulprospector.com/en/search?term=qgns I agree on your points above...

Does anyone with a Bosch powered bike have the UL sticker that has the UL file number? Just curious now.

An interesting observation is that Bosch doesn't seem to appear in the UL database anymore. I swear I saw it in there before. I checked all of the categories that @Fire_Safety listed in a previous post. Maybe I'm missing something. Bosch is shown in the NBDA database as having 2849...

I think the waterproofness requirement should be much higher. Some BMS do have humidity sensors, but all they can really do is prevent charge/discharge. I do like the idea of discharging a battery if water is detected. It would have to convert that energy to heat, which would take a while to...

Well, it helps reduce the odds of some points of failure - mostly electrical failures with some mechanical checks such as vibration and temperature swings. UL2271 (the requirement for batteries now in NYC) is more stringent than the other UL battery tests that can be used to get UL 2849 (full...

As mentioned in the posts above, UL certification does NOT guarantee safety. There have been multiple incidents with UL certified packs. To summarize, 2 of the major causes (perhaps the biggest ones) of fires are internal cell faults and water intrusion. UL does not address the first and is...

Thanks for posting this. The NYC law is somewhat ambiguous to me in terms of certified to/by/compliant with, etc. It states: "1. The electrical system for such bicycle has been certified by an accredited testing laboratory for compliance with Underwriters Laboratories (UL) standard 2849, or...

That seems like a dangerous loop hole. What i've read indicates that some of these fires have been caused by buying batteries used in other vehicles, perhaps from the used market. I believe every battery needs to have full protections built into it and not rely on the vehicle.

Could a pack really pass UL2271 if the BMS is reliant on the vehicle to tell it when to open the circuit? Perhaps in some edge case where the pack is non-removeable?

Firstly, I appreciate you posting publicly, and I know you didn't post with the intention of debating the merits of the test or if they are the right solution for the fire issues we are seeing. But, I think it is very important to get it out into the open. and that is what public forums are for...

The battery is the only significant fire concern. If a battery has been designed properly to keep the cells within voltage, current and temperature limits, it shouldn't matter with bike or device you connect it to. The pack should protect itself. UL battery testing should ensure that the...

Comfort. People want to hop in their living room on wheels with comfy seat and crank the A/C (or heat). Oh and a lot of people complain that the wind/helmet messes up their hair. Perhaps there isn't much we can do to persuade this segment of the population.