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A123 Updates Next Gen Nanophosphate EXT Batteries – Solves Lithium Battery Heat Issues

A123 Grid Storage Solutions May Also Greatly Benefit From New EXT Technology That Allows For Operation In More Extreme Temperatures

Not too long ago, but before A123 almost went out of business and was saved by a Chinese automotive parts maker, they announced they had perfected a disruptive new battery technology called Nanophosphate EXT.

A123 Systems Employees Perform Quality Check On A Lithium Ion Battery Pack (We are guessing this was taken after the Fisker Incident)

This new battery technology in A123′s labs was shown to improve power capability at low temperature and life at high temperature, a problem that is currently confounding Nissan LEAF management in the extreme heat of Arizona.

“Nanophosphate EXT is expected to deliver increased performance and reliability while minimizing complexity and reducing total cost of ownership (TCO) over the life of the battery system.”

At the time of the announcement three months ago, A123 said that battery chemistry would allow for 20-30% higher power at lower temperatures than their existing Nanophosphate batteries, while also giving “superior power retention.“ Under normal conditions, early testing had shown a 90% retention of initial capacity after 2,000 full charge cycles. Even at 45C (113F), it took almost 800 full cycle discharges for the pack to lose 5%, 1,600 cycles for 90%.

However, the internal temperatures that is currently crippling LEAF batteries in Arizona, and some parts of Texas and California, is even higher than that.

Thankfully, A123 has not only done more tests at even more extreme conditions on their Nanophosphate EXT batteries, they have also lent out cells to Ohio State University (OSU) to independently verify their results. And to say the results are encouraging is an understatement, they are ‘throw away your thermal battery management system’ good.

“In high-temperature testing, A123’s Nanophosphate EXT cells are exhibiting a rate of aging that is about three to four times lower than cells from a competing manufacturer of commercially available lithium ion technology. Specifically, in testing conducted at 75 degrees Celsius (167 Fahrenheit), A123’s Nanophosphate EXT cells are showing more than twice the life compared with the competition after about 700 full DOD cycles (at an aggressive 4C discharge rage). “


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