Hi Peri,
I don't have personal experience with Tesla, but I do with other OEMs.
It is very safe to say that the BMS is preventing just that sort of
problem.
When I read the article, it was about testing to destruction, not about
how to do safe, long-term charging. Yeah, FUD again.
I agree that reading history NOW is much more enjoyable, probably
because we aren't reading those "sanitized" history books from high
school. :)
Cheers!
On 3/17/20 9:36 AM, Peri Hartman wrote:
Thanks ! So, is it reasonably safe to say, especially with Tesla, that
the BMS is preventing the kind of excess rapid charging demonstrated
in the article ? It seems preposterous that significant damage is
occurring to EV batteries. (I know it will cause slow, long term
damage.) In which case, the article is intended to scare people and,
perhaps, funded by you know who. I looked at the article again, but
there's nothing ominous in the funding list.
Insomnia: I laugh. When I was in high school, if I had insomnia
(rarely), I remember I simply opened my history book and was asleep in
a few minutes. (I really enjoy history, now, by the way.)
Peri
------ Original Message ------
From: "Peter C. Thompson via EV" <ev@lists.evdl.org>
To: ev@lists.evdl.org
Cc: "Peter C. Thompson" <pe...@cruzware.com>
Sent: 17-Mar-20 8:51:08 AM
Subject: Re: [EVDL] DC charging damages EV packs (?fact or anti-EV-hype?)
Ah, finally, an area where I am an expert. :)
The communication is defined in ISO 15118-2, the transport layers are
in 15118-3 (PLC) and 15118-8 (wifi). No one is using the wifi version
for DC - only for wireless power.
However, nowhere in the spec does the battery temp get sent. There is
a warning when the battery is over temp, but that's about it.
Most of the time, the job of protecting the battery is the BMS. The
BMS tells the EV-side charger how much power it can accept, and when
to throttle power.
Part of this is that the OEMs think that any info about the battery
is confidential information. Which is why SoC is optional, and not
always sent to the charger.
And yes, you are absolutely correct, Peri: you DON'T want to read
these specs... they are a very good cure for insomnia.
Cheers, Peter
On 3/17/20 7:05 AM, Peri Hartman via EV wrote:
Do you know more, yourself ? I don't really want to study the spec :)
Peri
------ Original Message ------
From: "paul dove" <dov...@bellsouth.net>
To: "Peri Hartman" <pe...@kotatko.com>; "Electric Vehicle Discussion
List" <ev@lists.evdl.org>
Sent: 17-Mar-20 4:52:28 AM
Subject: Re: [EVDL] DC charging damages EV packs (?fact or
anti-EV-hype?)
DC fast chargers use HCL defined in ISO 15118-8 Specification.
Volume eight is the physical and data link layer
Sent from my iPhone
On Mar 16, 2020, at 11:42 PM, Peri Hartman via EV
<ev@lists.evdl.org> wrote:
I thought the level 3 chargers took into account cell temperature
and other conditions. I know, for example, that my almost 10 year
old Leaf battery charges at only about 10kw now. Something is
communicating.
Peri
------ Original Message ------
From: "evln via EV" <ev@lists.evdl.org>
To: ev@lists.evdl.org
Cc: "evln" <e...@gmx.us>
Sent: 16-Mar-20 12:57:21 PM
Subject: [EVDL] DC charging damages EV packs (?fact or anti-EV-hype?)
https://news.ucr.edu/articles/2020/03/11/fast-charging-damages-electric-car-batteries
Fast-charging damages electric car batteries
Commercial fast-charging stations subject electric car batteries
to high
temperatures and high resistance that can cause them to crack,
leak, and
lose their ...
https://news.ucr.edu/sites/g/files/rcwecm1816/files/styles/news_article_featured_l/public/2020-03/broken%20Tesla%20battery.jpg
+
https://www.latimes.com/business/story/2020-03-03/southern-california-ev-jobs
The electric-vehicle industry is thriving in Southern California,
report
says
2020-03-03 California is already a world leader in the embryonic
electric
vehicle industry but needs more government help to flourish,
according to a
new report from the Los ...
https://ca-times.brightspotcdn.com/dims4/default/b3308bf/2147483647/strip/true/crop/2048x1152+0+0/resize/840x473!/quality/90/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F0f%2F14%2F66195340cd40e6cdeb681fd96501%2Fla-1497909600-8tndt61ti7-snap-image
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