S3 battery picture wanted

Mine also next to the engine under the bonnet
 
Mine is also in the engine bay. Under the black material cover on the right in the picture.
Image
 
I'd like to see an actual picture of the battery and its specification.

Want to work on a Ultracapacitor bank to replace the battery to kill time until the car arrives.
 
you do realise its an uprated battery to support start/stop? can you do that?
 
monopole said:
you do realise its an uprated battery to support start/stop? can you do that?
Click to expand...

That's exactly why I want a picture of it with its specifications.

The Ultracapatior bank should drop around 2 voltage upon re-ignition and recover that charge in around 10 seconds.
 
http://www.partsbase.org/audi/audi-...ry-battery-mounting-battery-protection-cover/

If somebody could check the build option sticker of there car then you could work out what spec the battery is.
It will be something like J1D, J2D, J0T .
Are you going to completely redesign the cars electrical and charging system as well ?? .
Ultracapacitors are great in a Toyota world endurance car where you need to store and supply a great amount of power in a short time , not so good to replace a standard lead acid battery.

http://www.tecategroup.com/ultracapacitors-supercapacitors/ultracapacitor-FAQ.php
 
desertstorm said:
http://www.partsbase.org/audi/audi-...ry-battery-mounting-battery-protection-cover/

If somebody could check the build option sticker of there car then you could work out what spec the battery is.
It will be something like J1D, J2D, J0T .
Are you going to completely redesign the cars electrical and charging system as well ?? .
Ultracapacitors are great in a Toyota world endurance car where you need to store and supply a great amount of power in a short time , not so good to replace a standard lead acid battery.

http://www.tecategroup.com/ultracapacitors-supercapacitors/ultracapacitor-FAQ.php
Click to expand...

Thing is they have very low energy storage so if the bank is fully charged and you turn off the engine, the caps will drop in voltage very quickly if the lights are still on and/or if the sound system is on.

That wouldn't be a problem if the car was always turned off and locked out quickly.

The caps will remain at say 12 V for around a month before restarting the engine and topping it back again.

I am currently using a hybrid design with two ups batteries in parallel so I get a 12V 14AH battery supercapacitor hybrid.

Every time I turn the car on, the current is drawn from the caps and the batteries are just used to keep the car's systems working when the engine is off.

Does this car start the engine when the battery drops to low voltages? If so it will work with the ultracap bank without the need for a battery.
 
What is the purpose? What do you gain from it?
 
My current battery weighs 25 kg. The Ultracapacitor bank weighs 3 kg. Do the math.
 
Seems like a lot of effort to save 22kg, especially when the effect of losing 22 kg on acceleration and mpg will be fairly minimal, Think I would just fill up the petrol tank to half instead of full for the same effect, but then I probably wouldn't have bought an S3 if I was worried about the effect 22Kg would have on Mpg. But if it's all for a hobby and the love of tinkering then fair do's :)
 
It starts effortlessly when start/stop kicks in, but with there being so much tech on these cars I suspect start/stop would just deactivate if it detects low charge in the battery.

I've seen those ultracapacitors/battery packs before, great idea especially if you need to jump a car etc but I wouldn't risk completely replacing the factory battery on a new car.
 
So going by the spec sheet the option code for that battery would be J0T . 69Ah 360A.
You aren't saving much weight if you are running a pack weighing 3Kg of capacitors with two 7Ah UPS batteries which weigh around 2.5 Kg a piece. That would be about 8Kg.
Modern cars don't start with low voltages, the electronics don't like low voltage.
If the car has stop start then you will have big issues, those 7Ah UPS batteries are not designed for anything like what you are using them for. I would recommend something like a PC680 as a minimum

http://www.ebay.co.uk/itm/ODYSSEY-P...089?pt=LH_DefaultDomain_3&hash=item25a5e27699

I used to do robot wars many years ago and used the 7AH UPS batteries in the first bot.

http://www.ebay.co.uk/itm/LUCAS-12V...225?pt=LH_DefaultDomain_3&hash=item2319c41139

They are useless compared to the Odyssey / Hawker Genesis batteries I used later.

http://www.unipower.com/products/media/uploads/files/Hawker G16EP.pdf

The good thing about these batteries is the have no current limit on charge, so if you have a supply able to supply the current they will just suck it up. Great when you want to fast charge batteries between bouts.

It's not really worth the time or hassle trying to do this though as more than likely you will end up damaging the car as the charging system / alternator won't like it, and you will be making what should be a very reliable brand new car into something that is liable to break down any time.

Karl.
 
Does the battery in an S3 really way 25kg?
 
desertstorm said:
So going by the spec sheet the option code for that battery would be J0T . 69Ah 360A.
You aren't saving much weight if you are running a pack weighing 3Kg of capacitors with two 7Ah UPS batteries which weigh around 2.5 Kg a piece. That would be about 8Kg.
Modern cars don't start with low voltages, the electronics don't like low voltage.
If the car has stop start then you will have big issues, those 7Ah UPS batteries are not designed for anything like what you are using them for. I would recommend something like a PC680 as a minimum

http://www.ebay.co.uk/itm/ODYSSEY-P...089?pt=LH_DefaultDomain_3&hash=item25a5e27699

I used to do robot wars many years ago and used the 7AH UPS batteries in the first bot.

http://www.ebay.co.uk/itm/LUCAS-12V...225?pt=LH_DefaultDomain_3&hash=item2319c41139

They are useless compared to the Odyssey / Hawker Genesis batteries I used later.

http://www.unipower.com/products/media/uploads/files/Hawker G16EP.pdf

The good thing about these batteries is the have no current limit on charge, so if you have a supply able to supply the current they will just suck it up. Great when you want to fast charge batteries between bouts.

It's not really worth the time or hassle trying to do this though as more than likely you will end up damaging the car as the charging system / alternator won't like it, and you will be making what should be a very reliable brand new car into something that is liable to break down any time.

Karl.
Click to expand...

I will have to weigh the original battery and see if the savings are worth it.

I will also test the capacitor bank without any batteries first to see if it works for a week or so. I am still waiting for the car so I don't know what the power consumption is or if the car will start the engine when the "battery" voltage gets too low. If it does then the bank will work perfectly!

Can anyone test how much voltage the alternator generates when the engine is running?

Please keep in mind that this is just an experiment for fun. I will do it just because I can.
 
drummerdimitri said:
I am still waiting for the car so I don't know what the power consumption is or if the car will start the engine when the "battery" voltage gets too low. If it does then the bank will work perfectly!
Click to expand...

I would be amazed if the car started the engine when the battery got low, purely for safety reasons. What if it's in gear? What if it's in an enclosed garage? What if a mechanic is working on it? I just can't see unattended autonomous starting of the engine in a car that's been parked for ages being safe.

drummerdimitri said:
Can anyone test how much voltage the alternator generates when the engine is running?
Click to expand...

I've never measured my A3, but cars I've measured before have been about 14.2 to 14.4V.
 
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