I own an EV and know that I must keep it charged
I own an EV but it wasn't made clear to me that I must keep it from being discharged
I don't own an EV but knew that you had to keep the battery from going flat
I don't own an EV and didn't know that you needed to keep them charged
This is news to me (the 36 days from 0% SOC to battery being ruined). That's much longer than I thought.
Q. Under what conditions would an electric vehicle battery become drained beyond saving?
A. An electric car’s battery will fail totally only under extreme circumstances, according to Tesla. This occurs if the battery has been discharged “for an extended amount of time.” Chemical changes that take place will make recharging impossible.
The electronic vehicle log from the Roadster with the failed battery recorded a span of 36 days from when the state of charge reached zero percent until Tesla said a complete replacement was needed.
WTF? An extra 12V battery can solve the bricking problem and allow a bricked battery to be recovered? In what universe?
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And it seems like the experts are referring to other chemistries (for example the EV1 never had lithium batteries), in terms of recovering batteries. And it's unclear if it applies to a 6831 cell battery pack.
And the Nissan PR:
I'd like them to explain then, why the battery warranty is voided after 14 days at or near 0% charge, if the battery "will never discharge completely". Unless they have a different meaning for "discharge completely".Nissan said in a statement that the Leaf’s battery pack “will never discharge completely, thanks to an advanced battery-management system designed to protect the battery from damage.”
And, said a Nissan spokeswoman, Katherine Zachary, “Never means never.”
Because there are tons of crazy people in this world...
I thought Roadsters do in fact have a 12V battery? There seems to be a lot of confusion in that article, by "experts" as well. If a cell is damaged by sitting at 0% SOC there is no "waking it up" as far as I know. I also don't buy the statement from Nissan that "never means never". Their pack is eternal? What is meant by the statement from Tesla that “less than 10” cars are “susceptible” to bricking? How does that fit with "Ms. Brooklyn of Tesla said there was “no facility to prevent this full discharge” in the more than 2,000 Roadsters produced since 2008." Sounds as if all Roadsters are susceptible. They need to be clearer than that and get on the same page.
I guess what the idiots (sorry, 'experts') in that article are saying is that if there was a separate 12volt battery that could power the VMS/VDS then you could still have enough control to start a charge even if the ESS power level was low enough not to be able to run the internal systems. This does nothing to address the 'brick' issue in that even if you could power up the VMS/VDS to start a charge, the batteries when 'bricked' are dead enough not to accept one.
Again, from first hand experience, even with a completely dead ESS (fuse blown), Tesla rangers can plug in a maintenance power source and bring up the VMS/VDS in order to get logs and do whatever else is necessary, just fine.
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