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Lithium Technology Corporation Showcases New Battery Pack for Plug-in Retrofit

The LTC PHEV pack for the Prius. Click to enlarge.

Lithium Technology Corporation (LTC) has retrofit a Toyota Prius to a plug-in hybrid using a battery pack based on LTC’s new product line of large-format lithium iron phosphate (LiFePO4) cells, the largest cells of their kind in the world. (Earlier post.) The LTC battery pack replaces the OEM pack.

The 7 kWh battery pack, comprising 63 of LTC’s 3.2V, 35Ah iron phosphate cells, could support fuel economy of up to 125 miles per gallon, the company extrapolated, based on the performance of a smaller 2.2 kWh li-ion pack used in the Zytek smart for four conversion in the UK. (Earlier post.)

The large-format technology allows the use of a significantly lower number of cells. This enables greater precision in monitoring of the cells by the battery management system (BMS) to keep cells in balance for best performance and preventing damage to the battery due to over-voltage, under-voltage, over-temperature and short-circuit, according to the company.

LTC cells use LiFePO4 licensed technology, developed by Prof. John Goodenough with the University of Texas and supplied by Phostech.

The LTC Prius PHEV.

LTC decided to build the prototype itself based on interest it was hearing in the US market about plug-in hybrids, according to Dr. Klaus Brandt, the company’s CEO. The next step for LTC will be to gather operational data on the Prius PHEV.

LTC provides li-ion systems for a range of sectors, including automotive and military. At the event at which LTC unveiled the plug-in pack, the company also showcased one of the LTC-powered xBot Remote Operated Vehicles used to explore the RMS TITANIC.


Mark A

Any idea how much space this pack takes up, or how much it weighs? Also, does this pack require any sort of cooling to maintain efficiency? Cost?

Anyway, its small steps like these that are helping us towards making great strides in our future transportation, our future EV transportation. My applause is to be assumed audible.


The top picture gives a pretty good view of how large it is.


Well, their 45AH LiCoO2 batteries are 1.55kg

Maybe about 1.25kg for a 35AH LiFePO4 battery assuming little difference in weight of the components. That would be roughly 79kg or about 173lbs for the cells themselves. That rack probably adds 30-40lbs if made out of lower cost materials.


60mm diameter and 232mm length for 45AH cells.

This gives roughly: 12" x 27.5" size plus maybe about 3" of height for top to bottom spacing and the frame and then maybe 8-9" in length for the frame and intercell spacing. 15" x 36.5" is my best estimate if the cells match the size of the 45AH batteries they offer.


How are we going to "Support Our Troops" if Lithion-type batteries replace half the petroleum that is our God-Given right to run our cars on if we want to and employ right-thinking America-lovers doing their duty to God and country to fight for that petroleum? We're talking unemployed military men, their poor wives struggling to make ends meet on military pay, and their one-parent neglected children! On leave, how are military families gonna drive the kids across the country to Disneyland on batteries that discharge after a few dozen miles? How will military widows get to their distant minimum wage jobs that welfare requires them to take with cars whose batteries make them too expensive to buy? USA! USA! We're Number One! Huh?


We're going to have an acute shortage of strawmen if you keep that up, Wells.

Interesting battery pack! Now how much would it cost?

And how big will a battery only vehicle's pack be?

Michael McMillan

Many of the current electric only cars get about 200 watt hour to the mile.
7500 / 300 = 25 miles of range. ie this is a pack you want to have a generator with. It would make a great motorcycle battery though. My electric bike gets about 8-12 miles per kwh on lead acid without regen. which puts the range at 50 miles.

Freeway speeds 80 miles per hour times 200 watts per mile is:
0.2 * 80 = 16 /0.7 = 23 horsepower genpack to keep up.


By the way, I much prefer fewer higher capacity cells.


7500/200 = 37.5 miles...

Kirk Ellis


Don't worry overmuch about what our military men will do for a living.

If they aren't busy securing our energy supply from raving Islamic lunatics, they will still keep busy preventing those Islamic lunatics from reaching America as they did on 9/11. Or Iranian lunatics from developing nuclear weapons, or North Korean lunatics with nuclear weapons from bringing back the golden age of communist dictatorships.

Not to worry. There is plenty of work to do for our brave fighting men.


You know what?, we should invade Titan (Saturn's largest moon) plenty of petroleum up their! Make us some supersoldier space marines with that 500 billion dollar military budget and go and kick some “ice heads” butts on titan... Or we could just make PHEV.

I wonder which idea is more sane?


My earlier post was an attempt to achieve Memorial Day irony. Muslims surely cringe at casual assumptions that their nation's oil wealth is our energy supply to be secured through military means. It may be that US sponsored Iranian nuclear power development in the 1970's was meant solely for conserving Iranian oil for export to the USA. In other words, once again the US brings calamity upon its people.

Transportation must evolve beyond simply building a technologically better car, else we slack-skinned automatons may never achieve the status of human.


It's not just Muslims that cringe. I live just North of you with large fresh water resources. I've heard Californians discuss the need to divert some of our rivers. According to them we wouldn't really have a choice. You guys sure know how to make freinds.


There is a book I read titled "Resource Wars" that is a credible review of the worlds resources and how 9 billion people will need them over the next 50 years. Fresh water resources took up at least one chapter in the book.


Let's just hope nobody gets that stupid (George W.?) because such a move would destroy both of our countries. The US could take the resources overnight but the ensuing resistance would turn the entire continent into a police state. Correct me if I'm wrong but I think Ben Franklin said "The man who trades freedom for security does not deserve nor will he ever receive either." It's time for guys like Rumsfeld to get an education and think a little about the consequences of their actions.


With this announcement from Lithium Technology is seems to me that there now are 3 serious contenders for the US market for automotive lithium batteries 1) saft-johnson, 2) a123, and 3) Lithium Technology. This is very good news. Wonder what is the chemistry the saft automotives batteries?

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