Searching \ for '[EE[ Re: Measurement of cell voltages within a bat' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/power.htm?key=voltage
Search entire site for: '[EE[ Re: Measurement of cell voltages within a bat'.

Exact match. Not showing close matches.
PICList Thread
'[EE[ Re: Measurement of cell voltages within a bat'
2005\08\09@041518 by Vasile Surducan

face picon face
On 8/8/05, Michael Rigby-Jones <spam_OUTMichael.Rigby-JonesTakeThisOuTspambookham.com> wrote:
{Quote hidden}

 You are trying to brake a good rule of measurements: do not
influence the measured value with your measurement system. When the
battery is going to die, your system will be valuable like the battery
itself.

cheers,
Vasile

2005\08\09@084139 by Gerhard Fiedler

picon face
Vasile Surducan wrote:

>   You are trying to brake a good rule of measurements: do not
> influence the measured value with your measurement system. When the
> battery is going to die, your system will be valuable like the battery
> itself.

Not necessarily... with ~24 V nominal battery voltage, it's quite possible
to report a critical condition of the battery to a higher-order supervisor
system (that's not dependent on the battery) way before the battery is too
weak to supply the battery supervision circuit.

So while one could say that /after/ the battery died, the circuit that's
powered by the battery is not worth much anymore, it still is worth
something (and can be worth /a lot/) when the battery is still /going to
die/ -- that is, before it actually died. And probably even help prevent
that the battery in fact is going to die...

Gerhard

2005\08\09@084737 by Michael Rigby-Jones

picon face


{Quote hidden}

Exactly, this is essentialy the point of any battery monitoring system, i.e. to let the user/other systems know how much capacity is remaining, not to tell them the battery is dead.

Regards

Mike

=======================================================================
This e-mail is intended for the person it is addressed to only. The
information contained in it may be confidential and/or protected by
law. If you are not the intended recipient of this message, you must
not make any use of this information, or copy or show it to any
person. Please contact us immediately to tell us that you have
received this e-mail, and return the original to us. Any use,
forwarding, printing or copying of this message is strictly prohibited.
No part of this message can be considered a request for goods or
services.
=======================================================================

2005\08\09@151302 by Vasile Surducan

face picon face
On 8/9/05, Michael Rigby-Jones <Michael.Rigby-Jonesspamspam_OUTbookham.com> wrote:
{Quote hidden}

 Absolutely, but this will not be possible when the measuring system
is eating the battery. As long there is no charging system and the
battery is almost gone, the measuring system must be supplied from
it's own power supply.


cheers,
Vasile


{Quote hidden}

> --

2005\08\09@153955 by Michael Rigby-Jones

picon face
>> >Vasile Surducan wrote:
>> >
>> >> You are trying to brake a good rule of measurements: do not
>> >> influence the measured value with your measurement system.
>> >> When the  battery is going to die, your system will be
>> >> valuable like the battery itself.
>> >

>> >{Original Message removed}

2005\08\09@184559 by Vasile Surducan

face picon face
On 8/9/05, Michael Rigby-Jones <RemoveMEMichael.Rigby-JonesTakeThisOuTspambookham.com> wrote:
> >> >Vasile Surducan wrote:
> >> >
> >> >> You are trying to brake a good rule of measurements: do not
> >> >> influence the measured value with your measurement system.
> >> >> When the  battery is going to die, your system will be
> >> >> valuable like the battery itself.
> >> >
>
> >> >{Original Message removed}

2005\08\10@080227 by Michael Rigby-Jones

picon face


>-----Original Message-----
>From: spamBeGonepiclist-bouncesspamBeGonespammit.edu [TakeThisOuTpiclist-bouncesEraseMEspamspam_OUTmit.edu]
>Sent: 09 August 2005 23:46
>To: Microcontroller discussion list - Public.
>Subject: Re: [EE[ Re: Measurement of cell voltages within a battery
>
>
>> Vasile ,
>>
>> Have you ever taken a laptop battery apart?
>
> Sure, many of them have a simple 5 LED + button power indicator.


The ones I have taken apart contain a large quantity of devices including a microcontroller, often a real time clock and some form of battery management/protection IC, all of which is powered from the battery itself.

Regards

Mike

=======================================================================
This e-mail is intended for the person it is addressed to only. The
information contained in it may be confidential and/or protected by
law. If you are not the intended recipient of this message, you must
not make any use of this information, or copy or show it to any
person. Please contact us immediately to tell us that you have
received this e-mail, and return the original to us. Any use,
forwarding, printing or copying of this message is strictly prohibited.
No part of this message can be considered a request for goods or
services.
=======================================================================

More... (looser matching)
- Last day of these posts
- In 2005 , 2006 only
- Today
- New search...