Soon, we’ll probably be seeing Lithium Iron Phosphate (LiFePO4) batteries being used in most electric cars and bikes. This new battery type is set to dominate the market. Based upon lithium ion technology, LiFePO4 batteries offer many advantages over lithium cobalt dioxide (LiCoO2) batteries which are commonly used in laptops, mp3 players and cell phones.
In electric vehicles, LiFePO4 batteries offer greater range, power and safety. They provide full power until they are completely discharged, and recharge in just 2.5 hours. LiFePO4 chemistry is also environmentally friendly — it’s the least toxic of all the battery types.
A Graph Showing The Energy Density Of Various Batteries Types
LiFePO4 batteries were developed by Dr. John Goodenough at the University of Texas. These batteries have seen wide acceptance recently in Asian countries, but still have not made inroads in the U. S. marketplace. However, you can find these batteries being sold on eBay for electric bikes and scooters. You can now get a 52V LiFePo4 battery for an electric bike, that will give you a 65 mile range on a single charge with 60A drain rate.
For electric vehicles and plug-in electric cars, the LiFePO4 batteries will typically perform well in temperatures up to 400-degrees F, last for 6 to 7 years at a charge-discharge cycle of over 3,000.
The biggest player in the LiFePO4 marketplace for electric vehicles, however, is A123 Systems that has teamed up with GM to develop these batteries for the Chevy Volt plug-in hybrid. Another big player is Lithium Technology Corporation who has been working with GM, Toyota and U. C. Davis to develop LiFePO4 batteries for all-electric and hybrid vehicles.
Here’s a list of all the advantages of LiFePo4 batteries:
- Safe technology — will not catch fire or explode with overcharge
- Over 2000 discharge cycles life compared to typically around 300 for lead acid
- Double the usable capacity of similar amp hour lead acid batteries
- Virtually flat discharge curve means maximum power available until fully discharged (no “voltage sag” as with lead acid batteries)
- High discharge rate capability, 10C continuous, 20C pulse discharge
- Unlike lead acid batteries, can be left in a partially discharged state for extended periods without causing permanent damage
- Extremely low self discharge rate (unlike lead acid which will go flat quite quickly if left sitting for long periods)
- Does not suffer from “thermal runaway”
- Can be used safely in high ambient temperatures of up to 60C without any degradation in performance
- Maintenance free for the life of the battery
- Can be operated in any orientation
- Does not contain any toxic heavy metals such as lead, cadmium, nor any corrosive acids or alkalies thus making LiFePO4 batteries the most environmentally friendly battery chemistry available
- LiFePO4 cells are of solid construction — there are no fragile/brittle plates made of lead which can be prone to failure over time as a result of vibration
- Can be safely rapidly recharged — when fully discharged can be brought to a state of over 90% fully charged in 15 minutes
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{ 41 comments… read them below or add one }
Great new innovation!
But the following is not an advantage for this battery alone:
Can be connected in series for higher voltages or parallel for higher capacity.
Its for all batteries,
What’s really impressive is this
Can be safely rapidly recharged — when fully discharged can be brought to a state of over 90% fully charged in 15 minutes.
very nice!!!!
http://www.ee-lu.com
Where on the graph is the rating for the new battery??
cobalt lithium ion
Cephoe,
LiPO4 is phosphate, not cobalt.
@cephoe: “cobalt lithium ion”
That is incorrect. It is the “phosphate lithium ion” bar in the graph.
These appear to offer *less* range and power density than cobalt lithium ion… I’m failing to see the upside.
The chart implies/shows that this battery is inferior to cobalt and all of the comparisons are to lead acid batteries. Im not seeing the advantage of this battery type.
LiFePO4 batteries are already deployed world-wide in several hundred-thousand OLPC laptops:
http://wiki.laptop.org
http://laptopgiving.org
ciao!
Maybe the graph is a typo?
All of them on ebay come from China or Hong Kong. Do you know of any made in the US?
LiFePO4 just makes sense for EV’s - light, high energy density, long lasting, quick to recharge and available now. Not cheap yet, but widespread adoption should change that. I have an e-bike with a LiFePO4 battery pack and I love it.
The graph is not a typo. Lithium Cobalt batteries have a better energy density but can take less charge/discharge cycles. The other big advantage of LiFePO4 is that there is no thermal runaway which means a 20-pound ebike battery made of these cells won’t explode in your guts or burn your house down while it is charging. LiCo/Lipo (Lithium Cobalt/Lithium Polymer) batteries rarely burst into flames but the potential is there. If you want to see a bit of the potential of these batteries, look up Killacycle and watch the videos of it on the drag strip. The owner says that each run takes up about 10% of a full charge.
Wow, that truly is amazing news. Electric cars might actually become reasonable with stuff like this.
Jiff
http://www.FireMe.To/udi
From the article…
“Based upon lithium ion technology, LiFePO4 batteries offer many advantages over lithium cobalt dioxide (LiCoO2) batteries which are commonly used in laptops, mp3 players and cell phones. In electric vehicles, LiFePO4 batteries offer greater range, power and safety.”
But wait… the graph shows that these new phosphate Li-ion batteries have 60 Wh/Kg *LESS* energy output than Cobalt Li-ion? Yes, let’s all switch to these batteries so we can have “greater range, power and safety”? WTF?!?! NO.
Lithium Cobalt batteries do have a better power density, but as has been mentioned, are much more unstable. It’s surprisingly easy to overload a Lithium Cobalt battery, with catastrophic results.
A very high energy density really sounds like a great thing, more range with less need to charge, however that energy density has a downside as well. In the event of a runaway reaction, that energy WILL dissipate, and the higher the energy density, the more violent that reaction is going to be. A faulty charger, or someone trying to “hack” their charger to get better recharge times, can easily cause just this type of reaction.
In the RC boat racing circles, it is common to use the Lithium Cobalt batteries from power tools to run the vehicles, they have a fantastic power to weight ratio and a great discharge cycle for that purpose. Unfortunately, the rapid charging and discharging done during this racing will at times cause runaway reactions. These things explode like sticks of dynamite, so a lot of people charge them inside safes so that if they do overload they will be at least somewhat contained and hopefully not hurt anyone.
With that in mind, you are talking about a battery pack only the size of a few D cell batteries that will do significant damage when it goes off. Scale that up a little and realize that a car would have hundreds of times that amount of material that is JUST as reactive, and now instead of people containing it in a heavy casing to protect themselves, you are instead covering it with a small sheet of metal, and sitting on it, or putting your kids on top of or directly in front of it.
The lower power density, but MUCH higher stability of Lithium Phosphate sounds pretty good in comparison, now doesn’t it?
I believe we should join our efforts.
Great new invention, i like the look of it. Keep them coming!
How about using this technology for AAA, AA, batteries, etc? I keep trying to use rechargeables
but they discharge fairly fast if not used immediately after charging but even worse they seem to die many cycles before they are supposed to. I get nowhere near the 1000 to 2000 cycles advertised.
Anyway, the market for a decent rechargeable is huge, and would save having millions of toxic batteries in landfills.
Currently, the U.S. Military has total control over research for using Depleted Uranium and that includes battery development as well as H2 production. It seems wrong to exclude a known part of Science to appease the military, when we, the people, whom they supposedly serve and protect, are about to suffer terrible economic hardship, and need this knowledge to work our way out of current energy problems. Petitions are in order!
15 min recharge cycle looks fantastic. Are these batteries in production?
Very nice! I look forward to seeing a wider implementation of the technology!
This seems like a great technology. The price is a bit easier to take than traditional LION batteries. The problem with lithium though is we don’t have it here in the States, most lithium is mined in Asia.
Firefly Energy (google them) is making a lead carbon battery that will offer performance of about 4x current lead acid batteries. I’m looking forward to putting these in my electric car.
See it here: http://www.ZeroGasoline.com
Depleted Uranium is not something we want to proliferate and put in cars everywhere. Car crashes are bad enough, but when a collision results in nuclear fall-out, it’s really bad. Nuclear batteries are a great idea, but unfortunately a few bad apples could also ruin the bunch, I hate to use the “T” word, but the public is not ready for radioactive fuel sources.
I appreciate the excitement about Lithium Phosphate batteries, but this article contains a few incorrect statements. First of all, I work at a major Lithium battery producer in the US as a development engineer. We are developing this very type of battery.
The reason why it ‘appears’ as though you can recharge in 15 minutes is because Lithium Phosphate batteries have a FLAT voltage curve. This means that you can’t have any clue as to what state-of-charge they are in for 90% of their capability.
Lithium Phosphate batteries have much less capacity than Lithium Ion batteries and are absolutely only preferred in applications where the battery can’t catch fire. I mean, the power to weight ratio is fairly big. Not to mention Lithium Ion batteries are much more capable in applications where high discharge and high power is needed.
This is not a revolution in battery technology, trust me. The company I work at has relegated that they’re only useful in a select small number of applications. Lithium Ion are perfectly safe when coupled with good protection electronics and good build quality.
I wish there was a silver bullet, but this certainly isn’t it.
Well at least we don’t have to destroy entire forests to mine for nickel, unlike for nickel based batteries.
Sounds good but what do u think of biofuel?
Fuel the Film
The dependence on foreign oil, especially in the recent Bush administration, hurts the U.S. economy with the roaring gas prices. That in turn affects food prices and many more. Why rely on oil? I found an amazing movie which explains all these issues very clearly, and I highly recommend watching it… and showing it at work, school, or anywhere there are large groups of people. It truly raises awareness of global warming, 9/11, and how we can turn to alternative fuel such as biofuel to save costs and moreover, combat the impeding destruction of the environment. Biofuel does not put C02 into the atmostphere like gasoline.. which causes global warming!
http://www.myspace.com/fuelthefilm
Man I’m really looking forward to a set of these in the Chevy Volt. It’s already claiming 600+ miles per tank.
I’m glad to see more and more research in these areas… not only for automobile, but for marine use. I’m building a boat now and hope to power it with electric/solar.
http://www.craftacraft.com/
This is good stuff. Can’t wait to see it all go mainstream. And to Bruce above, an electric boat would just be awesome….
Rob,
There are more of them out there than you expect. I was surprised to learn that electric “launches” (river boats and the like) were pretty popular around the beginning of the 20th century, before internal combustion really got going.
Funny how somethings come back around
Check Out LiFeBATT - These batteries are here now and are available in high quality factory-built packs. http://www.lifebatt.com
These LiFePO4 Batteries are already here and available in a fully engineered line of packs designed for the EV market. Check out LiFeBATT!
I’m in Australia and these battery packs are being used in pedal assist bikes! I’ve got the 10 amp mens bike and am very impressed. I got mine from these guys http://www.shoprider.com.au/
Lithium ion battery, LiMn Battery, li-ION battery charger. ac/dc adapter, standard battery charger
Is that 15 minute, 90 percent recharge for real? If it is that is amazing!
http://renewable-energy-tv.blogspot.com
We are planning one electric car manufacturing unit.We are looking for adopting high energy batteries for best results like longer range,good acceleration and fast recharging.please advise me.Thank you
Well, the Boston-power Sonata batteries, improve the packing of standard cobalt Li-ion so that is very safe and show a 80% charge-state in 30minutes.
Hello,We are a professional LiFePo4 EV battery supplier.
For more details please visit our website http://www.evpst.com
Thank you very much
Mike.zzf
Sales Engineer
EVPST.COM
We have been using a Lithium Cobalt Maganese blend. The lifepo4 are an excellent choice for E-Bikes.
If there is a manufacturer that can provide us with high quality Lifepo4 Batteries please do not hesitate to contact us!!
Danny L. Ray II
http://www.ampedbikes.com
this is good idea !
Stop selling its advantages and tell us the truth. Im sure it is not that perfect and I have seen some of the disadvantages listed in other sites, yet there is none here.