User:Louis/sandbox dfli publish test: Difference between revisions
t Tag: Reverted |
t Tag: Reverted |
||
| Line 27: | Line 27: | ||
'''Dragonfly concedes the mechanism.''' As above, the complaint pleads that the terminal is designed so the polymer melts and the post loosens after a thermal event.<ref name="complaint" /> The certifications Dragonfly cites point the same way: the complaint states that the 100Ah battery ''"repeatedly and consistently passed the standard's most severe short-circuit test ... due to the presence of a thermal protection fail-safe."''<ref name="complaint" /> The melt-and-disconnect behavior is, on Dragonfly's own account, how the battery passes its safety test. Whether that behavior should be called a fail-safe or a flaw is a question of engineering judgment, not a question of whether the melting happens. | '''Dragonfly concedes the mechanism.''' As above, the complaint pleads that the terminal is designed so the polymer melts and the post loosens after a thermal event.<ref name="complaint" /> The certifications Dragonfly cites point the same way: the complaint states that the 100Ah battery ''"repeatedly and consistently passed the standard's most severe short-circuit test ... due to the presence of a thermal protection fail-safe."''<ref name="complaint" /> The melt-and-disconnect behavior is, on Dragonfly's own account, how the battery passes its safety test. Whether that behavior should be called a fail-safe or a flaw is a question of engineering judgment, not a question of whether the melting happens. | ||
'''Independent testing corroborates the failures.''' The technology outlet ''Hackaday'' reported on Prowse's controlled tests as they were published. A brand-new 100Ah unit's negative-terminal enclosure melted under an 80-amp discharge.<ref name="hackaday-melt">{{Cite web |url=https://hackaday.com/2026/01/16/battle-born-lfp-battery-melts-with-new-problem/ |title=Battle Born LFP Battery Melts With New Problem |publisher=Hackaday |date=2026-01-16 |access-date=2026-06-06}}</ref> A unit cycled at 49 amps, well under its 100-amp rating, drove the battery-management system into repeated disconnects while the spacer melted, and the management system ''"never puts the battery into any kind of safe mode."''<ref name="hackaday-death">{{Cite web |url=https://hackaday.com/2026/03/19/studying-a-battle-born-lfp-batterys-death-under-controlled-conditions/ |title=Studying a Battle Born LFP Battery's Death Under Controlled Conditions |publisher=Hackaday |date=2026-03-19 |access-date=2026-06-06}}</ref> A 300-amp industrial unit ''"failed violently with a cell venting and the loose BMS rattling around in the case."''<ref name="hackaday-autopsy">{{Cite web |url=https://hackaday.com/2026/02/16/performing-an-autopsy-on-15-dead-battle-born-lfp-batteries/ |title=Performing an Autopsy on 15 Dead Battle Born LFP Batteries |publisher=Hackaday |date=2026-02-16 |access-date=2026-06-06}}</ref> An earlier RV-industry report documented a field unit whose positive-terminal connection had worked loose and was measured at more than 200 degrees Fahrenheit with arcing inside the case.<ref name="rvtravel">{{Cite web |url=https://www.rvtravel.com/troubles-battle-born-batteries-youtuber-questions-safety-1240b/ |title=Troubles with Battle Born batteries? YouTuber questions safety |publisher=RV Travel |date=2025-12-18 |access-date=2026-06-06}}</ref> | |||