| Tue Jan 05, 2016 12:01 pm |
 Post subject: Lithium Battery |
AK
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Any links to decent priced suppliers?
Seen and felt the weight of the one Lowell uses in his Elise... and its LIGHT!
Charging - Need special charger?
Just bought 2 more CTEK conditioners so would be a bit :S if needed another charger
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| Tue Jan 05, 2016 12:26 pm |
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HummuH
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Looked into it when I bought my Odyssey battery.
Pretty sure they need a specific Lithium charger (£100 for CTek) and to get the Ah required for a saloon was coming in at about £800 for battery and charger.
Racing Batteries seem quite reasonably priced but not sure their range will be meaty enough for the Impreza.
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| Tue Jan 05, 2016 12:35 pm |
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AK
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Both ours run RedTop 15s...
They are
13 AH @ 5.5kg
200x77x133
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| Tue Jan 05, 2016 12:50 pm |
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AK
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| Tue Jan 05, 2016 1:26 pm |
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James B
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That does look a great way to save a little weight. I have a brand new red top in the Alfa but when it dies i'll certainly be taking a look at this option.
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| Tue Jan 05, 2016 1:46 pm |
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HummuH
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It's only 6Ah, I needed at least 12 for the Corrado. CCA is quite low too, enough to crank a cold engine?
Plenty around the £150 mark if 6Ah will do, it seems to be once you get into double digits with decent CCA the price rockets.
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| Tue Jan 05, 2016 1:48 pm |
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AK
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Lowell - can I borrow yours for a test? See if Fee's car likes it?
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| Tue Jan 05, 2016 1:55 pm |
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AK
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RE Charging...
| Quote: | | Do not use a charger that has auto-desulfation since it will hurt Lithium Phosphate batteries. Overcharging is also an enemy to batteries. Your charger should have a float mode which prevents the battery from being overcharged. |
The CTEK chargers I have state Desulphation as one of their 8 steps :/ min
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| Tue Jan 05, 2016 2:13 pm |
Post subject: Re: Lithium Battery |
scottish scrutineer
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| AK wrote: | Any links to decent priced suppliers?
Seen and felt the weight of the one Lowell uses in his Elise... and its LIGHT!
Charging - Need special charger?
Just bought 2 more CTEK conditioners so would be a bit :S if needed another charger |
Contact Allan McDonald, a hill-climber who sells Li-Ion batteries via his site www.skyrichbattery.co.uk
Best call him on Tel 01387 751152
or allan@allanmcdonald.co.uk
You'll also find him over on Flatchat if you can avoid the flack
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Last edited by scottish scrutineer on Tue Jan 05, 2016 2:16 pm; edited 1 time in total |
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| Tue Jan 05, 2016 2:13 pm |
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HummuH
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| Wed Jan 06, 2016 7:55 am |
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nefarious
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Adam, as you know, I've just got one for the racecar.
It's all a bit confusing, because the tech is all so new its still all wrapped up in marketing BS.
From my research:
- Lithium aH ratings are roughly 1/3-1/2 of those for a lead acid battery, due to LiFePo4's ability to use more of its available capacity (traditional batteries are dead at 40% capacity, while a lithium will keep on delivery down to 5-10%).
- Like-for-like Lithium batteries deliver a bigger CCA hit than a lead acid. Also different from a trad battery, the hit gets bigger as you keep trying and the battery warms up. My new racecar one is rated at 5aH and 280CCA but happily turned over the Jaguar (4L SC V .
- Chargers. Now this is a bit of a minefield. A lithium battery likes to be charged in one solid hit and not kept on a maintenance charge, whereas most "intelligent" trad chargers tend to go through various charge and discharge cycles, and switch to a trickle charge once the battery reaches 80-90% charge. Also some fancy ones have a de-sulphurisation mode, which kills LiFePo4 batteries. As I understand it, you'd be fine with a simple/old-fashioned one that delivers a constant 3amp current at 1-2v above the battery's target voltage, so long as you switch it off as soon as the battery's charged.
I bought a cheapy Lithium-specific one off eBay for £40, but I'm also building a DC-to-DC charger (from a simple step-up module off ebay), so I can keep the lithium jobbie topped up throughout race day. In theory, I should never need the mains charger, but I thought it best to get one anyway.
ETA - here's the charger I bought http://www.ebay.co.uk/itm/121641547932?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
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| Wed Jan 06, 2016 8:01 am |
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nefarious
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| Wed Jan 06, 2016 10:20 am |
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Nez-d
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I use a Magnetti Marelli MM-ION-10
Easily cranks my Hi-comp B18
920 grams and cost £118 iirc
Bought from Allan at A&G motorcycles.
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| Wed Jan 06, 2016 10:43 am |
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AK
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Fee's car seems a no brainer - it starts quickly etc.
Mine takes a few turns to sync all sensors and what not.
Will get one for Fee's first
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| Wed Jan 06, 2016 11:16 am |
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HummuH
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| Nez-d wrote: | I use a Magnetti Marelli MM-ION-10
Easily cranks my Hi-comp B18
920 grams and cost £118 iirc
Bought from Allan at A&G motorcycles. |
That's useful to know, cheers.
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