Driving around in one of those electric vehicles puts the battery pack in your
back pocket.
Youtube for a video on lithium battery fire and watch the timer! Don't blink,,,
>
> From: John Woodgate
>To: EMC-PSTC@LISTSERV.IEEE.ORG
>Sent: Sunday, March 10, 2013
It is interesting to contemplate the driving need for these batteries in an
aircraft setting.
In a large commercial airliner, especially a brand new one such as the B-787
Dreamliner, the need is purely a mass savings, which translates into
improved fuel economy if one carries the fuel economy calc
In message , dated Sun, 10
Mar 2013, Ken Javor writes:
In an aircraft lithium ion battery that can source hundreds of amps
there is lots of parallel!
I'm giving up flying, then.
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
SHOCK HORROR! Dinosaur-like DNA found in chicken and turkey m
In an aircraft lithium ion battery that can source hundreds of amps there is
lots of parallel! And in truth the interior of these batteries looks very
different than a conventional one because they all consist of a large number
of individual cells (small batteries) wired together series and parall
In message , dated Sun, 10
Mar 2013, Ken Javor writes:
The battery as such is a just a bunch of cells connected in series and
parallel;
Let us hope there is not too much 'parallel', because tiny differences
in cell voltage can result in circulating currents and positive feedback
effects, w
he
steady-state emissions.
Ken Javor
Phone: (256) 650-5261
> From: Ed Price
> Date: Sun, 10 Mar 2013 03:40:06 -0700
> To:
> Subject: RE: [PSES] Immunity and emissions below 150 kHz and lithium batteries
>
> The cells that I have worked with have had a certain amount of internal
&
The battery as such is a just a bunch of cells connected in series and
parallel; the challenge is in the charger, and all it is a protection
circuit. It functions to allow charge and discharge under normal conditions,
and to inhibit charging at abnormal bus potentials, and to open if too much
curre
In message <002601ce1d88$f1f8df60$d5ea9e20$@cox.net>, dated Sun, 10 Mar
2013, Ed Price writes:
Indeed, that should be written on a wall in everbody's lab. Failures
don't always go the way we expect; everything that the product does
correctly has to be monitored for degradation, but beyond t
sage-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Sunday, March 10, 2013 4:32 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Immunity and emissions below 150 kHz and lithium
batteries
In message < <mailto:001b01ce1d7b$a14241e0$e3c6c5a0$@cox.net>
001b01ce1d7b$a1424
In message <001b01ce1d7b$a14241e0$e3c6c5a0$@cox.net>, dated Sun, 10 Mar
2013, Ed Price writes:
The battery controllers themselves sometimes proved very vulnerable,
lacking radiated immunity, but they always failed by disabling the
battery; no dying controller ever forced the cells into a conf
ce
WB6WSN
Chula Vista, CA USA
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Saturday, March 09, 2013 3:14 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Immunity and emissions below 150 kHz and lithium
batteries
In message , dated Sat, 9 Mar
20
In message , dated Sat, 9
Mar 2013, Ken Javor writes:
In my experience the charger is built into the battery as a stand-alone
unit.
Perhaps that isn't the wisest arrangement. Didn't someone post that the
battery and charger are made by different people?
--
OOO - Own Opinions Only. See www.
In my experience the charger is built into the battery as a stand-alone
unit. The battery/charger connects directly to the 28 Vdc bus.
Ken Javor
Phone: (256) 650-5261
> From: John Woodgate
> Date: Sat, 9 Mar 2013 08:13:49 +
> To:
> Subject: Re: Immunity and emissions below 150 kHz and l
tigate or eliminate)
those conditions.
Ed Price
WB6WSN
Chula Vista, CA USA
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Friday, March 08, 2013 7:43 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: Re: [PSES] Immunity and emissions below 150 k
EE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: Re: [PSES] Immunity and emissions below 150 kHz and lithium batteries
One thing that needs to be considered is RTCA/DO-160 section 20 conducted
susceptibility requirements. I don't know into what category these lithium ion
batteries fall,
or eliminate) those conditions.
Ed Price
WB6WSN
Chula Vista, CA USA
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Friday, March 08, 2013 7:43 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Immunity and emissions below 150 kHz and lithium
batteries
One thing that needs to be
In message , dated Fri, 8
Mar 2013, Ken Javor writes:
I don't know into what category these lithium ion batteries fall, but
given the consequences of failure, the military hits them with 200 V/m.
It's not the battery that's vulnerable but the charger. I suspect that
gets 200 V/m as well
In message , dated Fri, 8
Mar 2013, Ken Javor writes:
I don't know into what category these lithium ion batteries fall, but
given the consequences of failure, the military hits them with 200 V/m.
It's not the battery that is likely to be vulnerable, it's the charger.
But I suppose that get
One thing that needs to be considered is RTCA/DO-160 section 20 conducted
susceptibility requirements. I don't know into what category these lithium
ion batteries fall, but given the consequences of failure, the military hits
them with 200 V/m. I would be surprised if the commercial air community
Recently, I heard of a couple of events, lithium battery fires it seems.
Details are very nebulous for liability reasons. You know that part of the
story.
So I'm pondering as to what could have caused such an event.
Since I get to measure radiated emissions down to 9kHz, I am aware of what
th
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