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I have been working on LT3652 for solar panels for which I need a li-ion battery model inorder to simulate. Can u suggest me some links or models?
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Lohith,
It just happens that I have been using this same charger on a project and created a simulation for it that contains a Saft battery model that is fairly representative.? Maybe it will be useful.
I just uploaded it to the Temp directory.??Normally that battery model is set for 1200mAh?but notice that I convert that to?10 msec to give quick looks at the charger behavior for different chemistry configurations.? In the battery block there are three configurations with SOC etc that can be selected by commenting.
Tim
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Lohith Vamsee wrote:
? ?"...?I need a li-ion battery model inorder to simulate.
? ? Can u suggest me some links or models?"
There may be a few in our group's Files section. ?Download the Table of Contents file (see instructions on the group's main webpage) and search it for "lithium". ? A few matches come up. ?It's not much, but you might find one of them works.
Regards,
Andy
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Hi Tim,
Thanks for the zip, but I can't find symbols "Potentiometer2".
Richard
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I need Li-ion battery model that can be simulated in lt-spice (4.2v) rather than charging ckt...If any1 had it..plz post it to me Thanking u
On Thursday, May 29, 2014 8:27 PM, "Andy
Andrew.Ingraham@... [LTspice]" wrote:
?
Lohith Vamsee wrote:
? ?"...?I need a li-ion battery model inorder to simulate.
? ? Can u suggest me some links or models?"
There may be a few in our group's Files section. ?Download the Table of Contents file (see instructions on the group's main webpage) and search it for "lithium". ? A few matches come up. ?It's not much, but you might find one of them works.
Regards,
Andy
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Lohith,
The circuit I uploaded contains a Battery model that can be used to simulate a Li-Ion battery.
Tim
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Lohith,
could you send a copy of li-ion files: vukan@...Thx Woody
I have been working on LT3652 for solar panels for which I need a li-ion battery model inorder to simulate.
Can u suggest me some links or models?
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The writings(code) on the circuit are clumsy and i could not infer anything ......can u plz mail me only the circuit with values separately?
On Friday, May 30, 2014 12:08 AM, "thutches@... [LTspice]" wrote:
?
Lohith,
The circuit I uploaded contains a Battery model that can be used to simulate a Li-Ion battery.
Tim
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Hello M. Tutches In the file you have uploaded all comments, LTspice directives, models and subckt are on the schematic drawings. So your schematic is quasi unreadable ( for me ). Could you make your file clearer ? Bests Regards, PhB
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In message <lmchu0+ui59cn@...>, dated Sat, 31 May 2014, "basier.philippe@... [LTspice]" <LTspice@...> writes: In the file you have uploaded all comments, LTspice directives, models and
subckt are on the schematic drawings.
So your schematic is quasi unreadable ( for me ).
Could you make your file clearer I suspect that the uploaded/downloaded .asc doesn't look like the author's original. I suggest he looks at it, so as to understand the problem. What has caused it? Helmut, do you have an explanation? -- OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk Nondum ex silvis sumus John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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All I uploaded a screen shot of how the circuit looks on my screen.? If that is what is considered clumsy, well - it is what it is.
Otherwise though, I'm using Arial 10pt font.? that and some other setting in my options could be causing it to jumble up on other screens.? ??? Tim
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Hello M. John Woodgate Some years ago, I saw the sale problem. I can't remember the reason why. Very hard to try to make this schematic clearer. Bests Regards, PhB
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Phillippe, does your screen look like the screenshot I posted??
?If not, I'd like to see what the clumsy screen version of the circuit actually looks like on another screen, so please someone upload a screenshot.? Hopefully I can learn to make my circuits "not-so-clumsy", so that If I ever post something, it doesn't create total confusion and consternation.
?:-)
Thanks,
Tim
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Hello M. Tutches? or Tim Yes your file Charger.jpg is very clear. Your file .asc should be like that. Could you make a "Reset to Default Values" in LTspice ? I'm absolutly not an expert. And I write bad English. Best Regards, PhB
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In message <lmckku+11hc6fs@...>, dated Sat, 31 May 2014, "thutches@... [LTspice]" <LTspice@...> writes:
All I uploaded a screen shot of how the circuit looks on my screen.? If
that is what is considered clumsy, well - it is what it is.
The screenshot is OK. What is in the ZIP is an .asc schematic file, not a screenshot. All the text areas are superimposed on the actual circuit elements, so neither are intelligible.
Otherwise though, I'm using Arial 10pt font.? that and some other
setting in my options could be causing it to jumble up on other
screens.? ???
AHA! Setting the font size to 10 instead of the default fixes the problem. But it's then difficult to read the text. So MOVE the text blocks away from the schematic and increase the size until it can be read. -- OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk Nondum ex silvis sumus John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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I found this, but have not tried it (yet): ?
It is NOT a *SPICE model, but I plan on making one from it.
--Steven Hill Excerpt: "Because the charging process for?Li+?batteries can take an hour or longer, testing a?Li+?battery charger using its natural load is time consuming and frequently impractical. To speed battery-charger testing, this article presents a simple circuit for simulating the behavior of a?Li+?battery. This circuit provides an efficient means of testing?Li+?chargers without using real batteries.
"
On Sat, May 31, 2014 at 10:21 AM, John Woodgate jmw@... [LTspice] <LTspice@...> wrote:
?
In message , dated Sat, 31 May 2014,
" thutches@... [LTspice]" < LTspice@...> writes:
>
>All I uploaded a screen shot of how the circuit looks on my screen.? If
>that is what is considered clumsy, well - it is what it is.
The screenshot is OK. What is in the ZIP is an .asc schematic file, not
a screenshot. All the text areas are superimposed on the actual circuit
elements, so neither are intelligible.
>
>
>Otherwise though, I'm using Arial 10pt font.? that and some other
>setting in my options could be causing it to jumble up on other
>screens.? ???
AHA! Setting the font size to 10 instead of the default fixes the
problem. But it's then difficult to read the text. So MOVE the text
blocks away from the schematic and increase the size until it can be
read.
--
OOO - Own Opinions Only. With best wishes. See
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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John,
The only other setting that I have that could affect this is that I use the BOLD option with Arial 10-pt font, which makes it pop a little better..
So other than resetting to defaults and redrawing my schematic for this, which is entirely tangential to the original intent of pointing out the Saft model and how I used it?to the OP, I'm beyond being able to spend time on it because it seems kind of open-ended as to what satisfies others about it should look like.
But I'll keep this in mind in the future.
Tim
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In message <lmcqgn+ui7i2a@...>, dated Sat, 31 May 2014, "thutches@... [LTspice]" <LTspice@...> writes: The only other setting that I have that could affect this is that I use
the BOLD option with Arial 10-pt font, which makes it pop a little
better.. I don't think that makes a significant difference.
So other than resetting to defaults and redrawing my schematic for
this, which is entirely tangential to the original intent of pointing
out the Saft model and how I used it?to the OP, I'm beyond being able
to spend time on it because it seems kind of open-ended as to what
satisfies others about it should look like.
I doubt that anyone expects you to, especially now I've explained how to fix it to use a larger font size and still see everything clearly.
But I'll keep this in mind in the future
The point is that LTspice (and probably most Spices) fixes the position of text on the schematic screen, I think, by the x-y position of the first character. So if the font size changes from a small number to a larger, especially to the default (which is actually the rather enormous Tahoma 28pt Bold), the text strings run over everything in their path. I don't think there is any better way of locating the text, short of setting up 'exclusion areas' around the schematic elements and setting the ends of strings to just touch the exclusion boundary. I think some printed circuit drawing programs do this, but it's very complicated to implement, because a string so placed might intersect another exclusion area along its length. -- OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk Nondum ex silvis sumus John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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hi, Good evening
I would like to thank u all for the immediate response and I've been working on it since then. The problem I encountered is - The charging/discharging is happening very fast (within 50ms) which should not have happened.Can u suggest me why it is happening so and the methods to tackle? I am using the saft battery model present in our group with LT3652 as a charger.
thank you,
regards, Lohith vamsee
On Saturday, May 31, 2014 9:09 PM, "John Woodgate jmw@... [LTspice]" wrote:
?
In message , dated Sat, 31 May 2014,
"thutches@... [LTspice]" writes:
>The only other setting that I have that could affect this is that I use
>the BOLD option with Arial 10-pt font, which makes it pop a little
>better..
I don't think that makes a significant difference.
>
>
>So other than resetting to defaults and redrawing my schematic for
>this, which is entirely tangential to the original intent of pointing
>out the Saft model and how I used it?to the OP, I'm beyond being able
>to spend time on it because it seems kind of open-ended as to what
>satisfies others about it should look like.
I doubt that anyone expects you to, especially now I've explained how to
fix it to use a larger font size and still see everything clearly.
>
>
>But I'll keep this in mind in the future
The point is that LTspice (and probably most Spices) fixes the position
of text on the schematic screen, I think, by the x-y position of the
first character. So if the font size changes from a small number to a
larger, especially to the default (which is actually the rather enormous
Tahoma 28pt Bold), the text strings run over everything in their path.
I don't think there is any better way of locating the text, short of
setting up 'exclusion areas' around the schematic elements and setting
the ends of strings to just touch the exclusion boundary. I think some
printed circuit drawing programs do this, but it's very complicated to
implement, because a string so placed might intersect another exclusion
area along its length.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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Lohith,
In the Saft model you should see where the capacity is scaled to allow fast simulation.? So 10 msec of simulation clock represents an hours of?real time at 1.6A.? This is not necessarily accurate but is useful.
To simulate normally, just place a semi-colon after 1200mah.
.param ah=1200mah * 1.2/1.6/3600/100??? ; normalized to 10msec sim time == 1hour of time
By the way there is a disconnected 25mF capacitor next to the Saft that does a decent job, I'm not sure the Saft in it's present form is setup correctly so you might want to read some Googled literature on it.
Tim
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thutches