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 Lithium Ion

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Assassin
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PostSubject: Lithium Ion   Thu Jul 28, 2011 12:34 pm

The future is here, battery technology is moving on and we are not restricted to the lead acid or calcium disulphide leisure or vehicle batteries anymore, lithium ion batteries are currently being mass produced in sizes suitable for larger 4X4's.

Li have many advantages over traditional lead acid or calcium batteries, this is mainly the abuse they can take from charging, they deal significantly better than lead acid with abusive charging regimes, so are much better suited to hostile conditions such as connection to solar panels, or cheaper unregulated 12v supplies from cheap generators. Solar panels often supply voltages of up to 17v and cheap unregulated generator 12v outlets often supply 16v, Li can cope with this.

Discharge rates are their greatest benefit, traditional batteries are scrap at 50% discharge, Li can tolerate 80% discharge without any damage to the battery, great for people running constant current draw such as fridges or other items for long periods away from a charging source. One other benefit is their flexibility, the same battery can be used as a vehicle battery or leisure battery, so standardisation on one battery size for all applications.

With mass production now being undertaken the prices have halved in one year, and continue to drop, soon they will be within reach of most overland vehicle users.

Currently, i have two fitted to each of my boats engines to replace the lead acid batteries, the increased performance is amazing, cranking twin Caterpiller diesels of nearly 1000 HP each takes a lot of power, and these crank them so fast they are nearly at tickover speed just cranking, much higher than the lead acid batteries which struggle.
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Jas
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PostSubject: Re: Lithium Ion   Fri Jul 29, 2011 3:41 am


Do you have a link to any good Lithium Ion battery's? They do sound very good.

At the moment Im using Odyssey Battery's, and so far over 5 years it has worked great. Even in -20 deg.


TJ

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Assassin
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PostSubject: Re: Lithium Ion   Sat Jul 30, 2011 11:59 am

Its a case of doing an internet search as many new companies are springing up, but great batteries for a camper, expedition vehicle, or working vehicle.
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kevinf
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PostSubject: couple of safety items regarding litium ion batteries   Thu Sep 08, 2011 10:30 pm

(1) if the battery substains damage and the various ingredients mix the possible out come is hydroflouric acid and contact which such acid can be FATAL if medical attention not sought imediately
(2) litium ion batteries involved in fires can not be extinghuised until all the fuel (ie the battery) is exhausted

hope this doesnt put anybody off using them just better to be forewarned

cheers kevin
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PostSubject: Re: Lithium Ion   Sun Sep 18, 2011 12:18 pm

This is an important point, manufacturers and suppliers recommend housing them in a fireproof box, particularly inside a vehicle when they are used an an additional battery.

I have two banks on the boat, both are housed in steel boxes as per the manufacturers recommendations.
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Jas
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PostSubject: Re: Lithium Ion   Sun Sep 18, 2011 8:12 pm


Really good Cheap fire proof boxes are MOD ammo boxes. All different shapes and sizes £4-£12 per box.

TJ

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