Lithium ion batteries like used in most mobile devices and some cars are the Lithium batteries most likely to catch on fire. The Tesla has a large cooling system for its batteries, to prevent this. LiFe-Po do not have the runaway heat problem that causes this in Li ion batteries. I don't know about other Lithium batteries.
--- In electricboats@yahoogroups.com, "rschwirz" <rschwirz@...> wrote:
>
>
> Interesting info
> I have been using Lithium Polymer Batteries for years with my the remote control model airplanes and I like them.
> They are very good.
> Model airplane enthusiast also know there comes a danger with Li-Poly batteries.
> I several cases the airplanes burst into flames while the batteries are been charged. Not only out there in the field but also in peoples basements.
> The chemicals of the Li-Poly batteries used in airplanes are only in a light weight pouch. If that pouch gets punctured and the Lithium gets exposed to air
> It will ignite into high temp flames just by coming in contact with air. That's why all the suppliers of those batteries recommend charging them outside the house in a flame retardant container. Again, those pouches are light weight and can be damaged easily in a small crash.
> I know youtube has some videos about Li-Poly fires http://www.youtube.com/results?search_query=li-poly+battery+fire&oq=Li-Poly&aq=0&aqi=g6g-C1g-sC1&aql=&gs_sm=c&gs_upl=4092l7410l0l13422l7l7l0l0l0l0l377l1822l0.1.1.4l6l0.
> There is no danger with LiFEPO4 batteries as far as I know.
>
> Robert
>
> --- In electricboats@yahoogroups.com, Bill Heintz <bheintz@> wrote:
> >
> > Perhaps af interest: from LinkedIn Green Yachts Design & Tech Group
> >
> >
> >
> >
> > Marine Lithium-Polymer Batteries Developed by ESTechnologies BV -
> > Netherlands
> > Monday, January 23, 2012
> >
> >
> > ESTechnologies has designed the first Lithium-Polymer battery with
> > Lloyds Certificate in the world. This battery is specially designed
> > and certified for Marine applications and large Energy storage systems
> > in the most harsh environment.
> > Energy storage
> > With a Lithium Polymer Battery you can create energy storage in a cost
> > effective manner, reducing fuel and therefore making a contribution
> > to a better environment. Reduction of CO2 emissions, and energy which
> > normally gets lost, will now be saved and stored by means of optimized
> > power management.
> > This makes the use of energy more efficiently. This is due to the
> > special qualities of the lithium polymer cells. Firstly, the chemical
> > composition of the battery, using non corrosive chemicals which
> > guarantees long lifetime and little wear.
> > Secondly, the use of polymer technology allows to make batteries with
> > extremely high efficiency and low impedance(lowest on the market).
> > The polymer technology and the chemical composition makes it possible
> > to realize an extremely high number of charge / discharge cycles, over
> > 5000 cycles, with a long lifetime.
> > With these cells ESTechnologies produces high voltage and high power
> > battery systems. For this purpose, 51.8 Vdc battery blocks have been
> > developed with a capacity of 100Ah or 200Ah.
> > The battery blocks are built with only 14 large single cells instead
> > of (most common), hundreds of small cells. This contributes to the
> > already high reliability of the battery systems.
> > Battery Management System
> > To guarantee the extensive lifetime of this battery, ESTechnologies
> > has also designed a unique Battery Management System with constantly
> > active balancing. Unlike any other system available on the market
> > today, this Battery Management System has superb specifications. It
> > can balance energy between cells within one battery unit and even
> > between cells of different battery units connected in one system. This
> > is all achieved with minimal losses. Special care has been taken to
> > ensure safety at all times. High DC voltage is present at large energy
> > storage systems and additional safety measures are built into the
> > battery module itself.
> > The batteries communicate with other modules and system controllers
> > like NMEA2000 devices. The 50V battery modules are constructed for
> > durability with just 14 large LiPo cells in series and a reduced
> > amount of parts.
> > Each cell has its own chemical process. Therefore a balanced system is
> > needed. EST uses an in-house developed, state of the art, active
> > balancing and monitoring board for each module. If there is an
> > imbalance in the system, a part of the energy will be transported from
> > the highest cell to the lowest cell. Result: The EST modules are
> > always 100% balanced.
> > The required voltage is realized by connecting batteries in series,
> > the required power can be obtained by connection these battery series
> > in parallel. ESTechnologies is responsible for the complete supply and
> > installation of the complete system including battery, total battery
> > management and safety features.
> > Because of working with a high DC voltage, safety has top priority and
> > is included in the overall design philosophy. The housing and
> > connectors are fully protected and have IP65 rating.
> > Further Development
> > ESTechnologies is still improving their batteries and have now made a
> > very important step forward. They have found positive improvements
> > regarding the weight of the batteries.
> > ESTechnologies has succeeded to reduce the weight of their batteries
> > with 12% from 85 kg to 75 kg. This by using a new cell which is
> > lighter and by improving the mounting frame on the inside.
> > Other Specifications of ESTechnologies batteries are:
> > • Lloyd's Certified with Lloyd's Certified power connections
> > • Certified for high DC voltage systems
> > • Have a charge and discharge efficiency of more than 95%
> > • Configurable for Mega-Watt applications
> > • Very light weighted and ultra-compact in size
> > • Designed for large energy storage systems
> > • Maintenance free
> > • Environmental friendly (100% recyclable)
> > • 10 years limited warranty
> >
>
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