Thread: Lifepo4
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Old 2nd May 2008, 20:03
Jeremy Jeremy is offline
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Join Date: Oct 2007
Location: Salisbury
Posts: 429
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Syman,

You can choose to disagree with me if you wish, but I do actually run a bike with a 36V 10Ah Ping pack, so can discuss it with the benefit of first-hand experience.

The cells are rated at 2C continuous, as has been mentioned, but will quite happily deliver at around 4C without any problems. They stay cool, even at 4C discharge rates, in fact. I tried the battery on my Crystalyte motor last week, just as an experiment. This motor pulls around 35A from the pack at full throttle. The pack coped with this load without a problem, although the BMS did limit a couple of times.

Several people on the Endless Sphere have happily run the cells at up to 4C or more and not had serious problems. The cell weak points are the connection tabs, not the chemistry. These are fairly fragile and one ES member managed to burn through a tab when he took the BMS off and pulled 50 or 60 amps from a small pack.

I am not sure where you are getting the information that states that these packs are only OK for 10A. It certainly is not mentioned by Li Ping in his data, to the best of my knowledge.

Jeremy
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